Analysis of housing models of modern single-stage universal gear reducers

Rackov, Мilan; Knežević, Ivan; Kuzmanović, Siniša; Čavić, Maja; Penčić, Marko

doi:10.1088/1757-899x/393/1/012048

Cited by 5 publications

(6 citation statements)

References 2 publications

(2 reference statements)

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“…But soon they increased axis heights in order to increase gear ratio, and now reducers are produced with axis height in a standard row R20/2. In the area of the most used gearbox sizes, some manufacturers produce so-called intermediate sizes with the axis heights in row R20 [6,7]. In recent time, manufacturers of gear reducers try to achieve the same axis heights in order to ensure greater exchangeability of their gear units.…”

Section: Problem Descriptionmentioning

confidence: 99%

“…In that way, the cost of both bearings on the output shaft will be smaller, mounting and dismounting will be much simpler and the shaft is allowed to be expanded properly when heated. [7,8,9] The helical gear should be positioned between the bearings, which ensure greater shaft rigidity. It is preferable the gear is positioned in the middle between the bearings to provide as even as possible the contact between two gear flanks.…”

Section: Problem Descriptionmentioning

confidence: 99%

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Design solutions overview of single-stage universal gear reducers

et al. 2020

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Today, for almost all products, the appearance is very important. Thus, for example, the appearance of universal gear reducers was not given so much attention, but today there are many very interesting solutions of shape, colour and graphic design. It should have in mind that universal gear reducers have much complex construction comparing them with special gear reducers. In the same time, they have to provide different positions and way of mounting and different speeds with different powers (torques) at the output shaft. Particularly, it should be noticed, that within all universal gear reducers single-stage gear units are nowadays increasingly used because their gear ratio values are increased (values of gear ratio can go up to 15) so that these reducers largely cover most of the two-stage gear reducers with their gear ratio values, so thereby their exploitation is significantly increased. Single-stage gear reducers are very simple products, and today there is a large number of manufacturers of such product. However, their mounting dimensions and way of mounting are not defined by a standard, so there is a variety of units with different dimensions and way of mounting. Although, most manufacturers look up to dimensions of leading manufacturers (usually SEW) in order to ensure greater exchangeability of their gear units. It is interesting to note, that most manufacturers tend to adopt the design of housing that will be substantially different from competing solutions. The reason is probably to avoid the possibility of being accused of copying someone else’s solution. However, there are manufacturers that retain almost identical housing design as a competing solution (probably they bought the licence or the solution is copied without permission). This paper considers only the design solutions of single-stage gear reducer in order to indicate the expected directions of their further development.

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Section: Problem Descriptionmentioning

confidence: 99%

Section: Problem Descriptionmentioning

confidence: 99%

Design solutions overview of single-stage universal gear reducers

et al. 2020

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“…It follows that single-stage gear reducer should be produced with high gear ratio (up to 15 [1,7]) in order to cover as large as possible range of gear ratios of two-stage gear unit.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Conceptual Solutions of Universal Helical Geared Reducers

Rackov,

Kuzmanović,

Knežević

et al. 2020

IJEMS

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Geared reducers are mechanisms designed to reduce the number of revolutions using geared elements and nowadays they present one of the most commonly used types of mechanical transmissions in mechanical engineering. Due to the different shapes of geared elements, there are different types of geared transmissions: helical, bevel, worm, special and combined transmissions. This paper analyses only helical geared transmissions, since there is a great extent of whole this matter. Helical transmissions are analysed only with external helical gearing, since internal geared pairs represent a special and very large group of gears. Within the external helical geared transmissions, only torque transmissions are analysed, while the transmissions of motion are not analysed and they represent another large group of transmissions. Only universal gear reducers with axial, or almost-axial, parallel shafts are considered (two-stage and three-stage transmissions). Although, single-stage gear reducer produced with parallel shafts are not considered by the paper in order to reduce the area of researching. Gear reducers are most commonly delivered to customer with electric motor, known as motor geared reducer, and they are studied here extensively. Gear reducer can be also delivered without motor, only with input shaft. The basic aim of this paper is to present all characteristics and specificities of motor geared reducer in one place.

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“…In the case of sand casting of the gear housing elements, a number of requirements arising from good practice in the casting process and subsequent machining operations are recommended to be followed. This includes the requirements as follows [1][2][3][4][5][6][7]:…”

Section: Introductionmentioning

confidence: 99%

Optimizing Weight of Housing Elements of Two-stage Reducer by Using the Topology Management Optimization Capabilities Integrated in SOLIDWORKS: A Case Study

Slavov

Konsulova-Bakalova

2019

Machines

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This paper presents the results of a conducted topology management optimization study based on the finite element analysis on a two-stage spur gear reducer housing body and cover using the SOLIDWORKS Simulation module. The main goal of the study is to optimize the overall weight of the reducer by thinning specific areas of the casted gearbox housing elements according to the calculated minimal strain energy. The topology optimization algorithm that is used in current research gives an optimal structural shape of the housing elements of the reducer with the largest stiffness, considering the given amount of mass that will be removed from the initial design space. The complete sequence of steps for conducting the topology management optimization study is shown, taking into account the constraints arising from the construction features and the method of manufacturing the housing elements of the gear reducer. Conclusions on the use of the topology optimization results are given and potential directions for further development of the approach are also identified.

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Analysis of housing models of modern single-stage universal gear reducers

Cited by 5 publications

References 2 publications

Design solutions overview of single-stage universal gear reducers

Design solutions overview of single-stage universal gear reducers

Analysis of Conceptual Solutions of Universal Helical Geared Reducers

Optimizing Weight of Housing Elements of Two-stage Reducer by Using the Topology Management Optimization Capabilities Integrated in SOLIDWORKS: A Case Study

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