RU2414342C1 - Device to fix hand tool - Google Patents

Abstract

FIELD: process engineering. ^ SUBSTANCE: invention relates to machine building, particularly, to hand tool fixtures. Proposed device comprises rack with teeth arranged on tool base, said teeth representing lugs. Spacing between said lugs and that between lug faces and said base do not exceed minimum size of hand tool. Note here that said teeth are made from elastic material with elasticity creating balancing forces acting on fixed hand tool of the set. To achieve better results, coat is applied on base surface to increase friction, while, to reduce overall dimensions, the rack is arranged to turn and be placed onto the base. To increase locking force, two and more racks may be arranged in lined. ^ EFFECT: universal and convenient device for repair and scheduled work in zero-gravity conditions. ^ 4 cl, 3 dwg

Description

The invention relates to devices for fixing a hand tool and is intended for repair and maintenance work, especially work carried out at heights, in cramped conditions, as well as in zero gravity.

Known clamps of hand tools based on the magnetic properties of the material [1]. However, these clamps of a hand tool cannot ensure fixation of a tool whose material does not possess magnetic properties.

A device for storing tools is also known, containing a base wrapped around the user's hand, provided with base fastening elements and means for placing tools, which can also be considered analogs. The storage device uses magnetic elements, loops mounted coaxially with the magnetic elements, and clips in the form of adhesive tape to secure the light source [2]. However, the disadvantages of these devices for placing tools is: for magnetic clamps, selectivity to the material of which the tool is made, and their interaction with the magnetic field of the earth; when using loops in the work, it is necessary to use both hands, and also the tool can be fixed of a certain shape and size; for fixatives in the form of adhesive tape is their tendency to contaminate the surface, which makes them inoperative.

The objective of the proposed device is to increase the versatility and ease of use in zero gravity, the exclusion of permanent magnets from the design of the clamp.

The technical result is achieved in that a device for fixing a hand tool, comprising a comb mounted on the base with teeth made in the form of petals, the gap between which, as well as the gap between the ends of the petals and the base, does not exceed the minimum size of the hand tool from the kit, while the teeth are made from an elastic material, the elastic forces of which provide the creation of balancing forces acting on a fixed hand tool from the kit. To achieve a better result, a coating is applied to the surface of the base to increase the friction force, and to reduce the dimensions of the comb, it is installed with the possibility of rotation and laying it on the base. To increase the fixing force, two or more combs can be installed in parallel in a row.

Improving versatility and ease of use is achieved due to the "indifference" of the design of the device for fixing the hand tool to the properties of the material from which the hand tool is made from the kit. The design of the device makes it possible to manipulate a hand tool with one hand. Permanent magnets are excluded from the design of the device.

The essence of the invention is illustrated in figures 1-3, which show:

figure 1 is a left view;

figure 2 is a transverse section;

figure 3 is a view in isometric view.

The device for fixing the hand tool is made in the form of a base 1 with a comb 2 fixed on it with teeth in the form of petals 3, the gap between which and the base 1 does not exceed (in the free state) the minimum size of the hand tool from the kit, while the teeth in the form of petals 3 made of an elastic material, the elastic forces of which provide the creation of balancing forces acting on a fixed hand tool from the kit, i.e.:

- сумма всех сил, действующих на зафиксированный в устройстве ручной инструмент из комплекта. Основная сила, которую необходимо компенсировать, - это сила тяжести ручного инструмента, а основная компенсирующая сила - это сила трения между поверхностями ручного инструмента и поверхностью основания 1, а также поверхностями торцов лепестков. Для реализации данного устройства необходимо подобрать материал для лепестков 3 и определить их геометрические параметры. Вывод математической зависимости этих параметров от сил, фактически действующих на любой зафиксированный в устройстве ручной инструмент, является сложной задачей из-за большого количества факторов, влияющих на величины этих сил. Поэтому при подборе параметров, необходимых для удовлетворительной работы устройства для фиксации ручного инструмента, можно использовать экспериментальный метод. При подборе материала для изготовления лепестков 3 предпочтение следует отдавать материалу с минимальным накоплением остаточной деформации после длительного выдерживания в деформированном состоянии в рабочем интервале температур окружающей среды (в которой предполагается эксплуатация устройства для фиксации ручного инструмента). Для подбора геометрических параметров лепестков 3 следует выбрать из комплекта ручной инструмент, имеющий максимальную толщину и вес. По максимальной толщине ручного инструмента и свойствам материала определяется длина лепестка 3 (высота гребенки 2), а по максимальному весу - толщина и ширина лепестка 3. Количество лепестков 3 (длина гребенки 2) зависит от предполагаемого количества инструментов, требующих одновременной фиксации в устройстве. Для увеличения силы трения, как одной из главных сил, компенсирующих силу тяжести ручного инструмента, на основание 1 нанесено покрытие 4.Where

- the sum of all the forces acting on the manual tool from the kit fixed in the device. The main force that needs to be compensated is the gravity of the hand tool, and the main compensating force is the friction force between the surfaces of the hand tool and the surface of the base 1, as well as the surfaces of the ends of the petals. To implement this device, you need to select the material for the petals 3 and determine their geometric parameters. The derivation of the mathematical dependence of these parameters on the forces actually acting on any hand tool fixed in the device is a difficult task due to the large number of factors affecting the magnitudes of these forces. Therefore, when selecting the parameters necessary for satisfactory operation of the device for fixing the hand tool, you can use the experimental method. When selecting material for the manufacture of petals 3, preference should be given to material with minimal accumulation of residual deformation after prolonged keeping in a deformed state in the working range of ambient temperatures (in which the device for fixing a hand tool is supposed to be used). To select the geometrical parameters of the petals 3, you should choose a hand tool from the kit that has the maximum thickness and weight. The maximum thickness of the hand tool and the material properties determine the length of the petal 3 (comb height 2), and the maximum weight - the thickness and width of the petal 3. The number of petals 3 (comb length 2) depends on the estimated number of tools that require simultaneous fixation in the device. To increase the friction force, as one of the main forces that compensate for the gravity of a hand tool, a coating 4 is applied to the base 1.

The blank for the manufacture of petals 3 can be represented in the form of a cord, the cross-sectional shape can be square, rectangular, hexagonal, octagonal. In this case, the petals 3 cut from the cord are adjusted to each other with the necessary clearance and are firmly fixed to the base of the comb 5 made of metal or impact-resistant plastic. Technologically, the most advantageous is the manufacture of petals 3 from sheet material. In the rectangular workpiece, parallel slots of the required width are made from one of the larger sides, and the opposite side of the workpiece is securely fixed at the base of the comb 5. The slots are made with undercutting, which eliminates scattering into individual petals. When installing the device on the basis of 1, it is necessary that the gap between the ends of the petals 3 and the coating 4 does not exceed the minimum size of the hand tools from the kit (needles, hacksaw blade, screwdriver, etc.).

Using the above recommendations, a hammer 6 with a weight of 270 g and a thickness of 19 mm was selected from a set of hand tools designed for fixing, and rubber grade 9102 based on nitrile butadiene rubber (SKN) TU 38 005924 was chosen as the most suitable material for making the petals 3 -2002 with a thickness of 2 mm, with a blade width of 15 mm and a length of 50 mm, a stable fixation of a hand tool, for example hammer 6, was achieved. To increase the friction force between the hand tool and base 1, a coating 4 was used, for example, loop fabric KTL th 1000/6 TU U 17.6-16287311-154-2008. The correctness of the selected design parameters can be verified by holding the device for the necessary time with a fixed hand tool, such as a hammer 6 in the operating temperature range, and then checking the pulling force of the hammer 6 with a dynamometer.

It should be noted that due to the wide variation in the weight characteristics of the used hand tools, this fixation method is most effective in zero gravity conditions.

The device operates as follows. A hand tool, for example, a hammer 6 from the kit, intended for fixing, is inserted into the space between the base of the comb 5 and the base 1 with the coating 4. Some of the petals 3 that impede the hand tool, such as the hammer 6 from the kit, are bent under the force exerted on the hammer, and pass it under the base of the comb 5, the elastic forces arising at the same time, trying to return the bent petals 3 to their original position, act on the surface of the hammer 6 and press it to the base 1 with a coating 4. Forces arising is, thus, prevent movement of the hammer 6 along the surface 4 coated under the influence of gravity, i.e., balance it and there is no difficulty in manipulating with a hammer 6. A thin or miniature hand tool, such as a screwdriver 7, falling between the petals 3, also experiences a jamming effect due to the action of elastic forces tending to return the petals 3 to its original position, while the forces holding the screwdriver 7 arise on its surface. By installing the combs 2 (of the same design) in parallel in a row, it is possible to increase the total forces that impede the release of the hand tool from the kit by the number of combs 2 installed.

Thus, in the invention was achieved "indifference" of the design of the retainer to the properties of the material of which the hand tool is made. Permanent magnets are excluded from the design of the retainer. And also a device for fixing hand tools is applicable in zero gravity conditions, which solves the tasks.

Literature

1. "Practical advice to the car owner." Gornushkin Yu.G., DOSAAF, 1984.

2. Patent RU No. 2304421 C1, A45C 11/26, A45F 5/00, 02/14/2006.

3. Elementary textbook of physics. Ed. Acad. G.S. Landsberg, volume 1. M., 1971

Claims (4)

1. A device for fixing a hand tool, comprising a comb mounted on the base with teeth made in the form of petals, the gap between which, as well as the gap between the ends of the petals and the base, does not exceed the minimum size of the hand tool from the kit, while the teeth are made of elastic material, elastic forces which provide the creation of balancing forces acting on a fixed hand tool from the kit. 2. The device according to claim 1, characterized in that the surface of the base has a coating that increases the friction force. 3. The device according to claim 1, characterized in that the comb is installed with the possibility of rotation and laying it on the base. 4. The device according to claim 1, characterized in that two or more combs are installed.

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