DD200496A1 - PROTECTIVE ENGINE MOUNTING WITH DAMPERING ELEMENT FOR BUEROOM MACHINES - Google Patents

Abstract

The motor suspension is particularly suitable for transportable office machines because of their load capacity against heavy shocks, in which the motor and its suspension is endangered by the improper transport at the workplace. The motor suspension should dampen engine noise and vibrations in addition to the high load capacity against shock with low parts and assembly costs and allow a slight self-adjustment of the engine to the machine frame. This is achieved by the shape of the engine brackets and their support and attachment in the machine frame and the cross-sectional reduction of the Daempfungselemente. Fig.1

Description

YaiQ Robotron - Optima. iS-569-nei Michel

speed

Title of the invention

Protected motor suspension with damping element for office machines.

field of use

The invention relates to a protective insulated motor suspension with damping element for office machines ₃ typewriters in particular «It should dampen the vibration and noise of the engine and prevent the destruction of the engine mounting in extreme shock loads of office equipment.

Characteristic of the known technical solutions

The use of elastic material damping elements between the engine and rigid engine mounts

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or Lagerungen is known from a variety of applications · 'They have the task ₃ ^J vibration and noise to attenuate,' or to reduce the transmission to the devices. However, the motors are largely fixed in their position and can not follow small position deviations from the desired position. That requires a very accurate attitude.

It is known from DE-OS 2 219 182 an engine mount, in which in addition to a support member, an abutment is mounted _ä in particular to reduce tangential and radial vibrations. The supporting member fastened to the bearing block with its outer ring has an inner ring to which the motor is fixed and which is connected by ribs radially and tangentially elastically to the outer ring. The abutment has Begrenzungsfläc e ¹ " ¹ Ήά" - "d 'ie on the inner Rin ^ of the support song existing stops and is adjustably attached to the bearing block'. There is a play between the boundary surfaces and the stops in the tangential and radial direction. "The tangential clearance can be adjusted by adjusting the abutment, while the radial play is determined by the dimensions of the stops and the boundary surfaces. The motor suspension leaves besides the reduction of radial and tangential vibrations On the other hand, however, it offers no protection against strong shock loads, especially in the axial direction. By placing the stops on the boundary surfaces of the abutments, noises and vibrations of the engine are transmitted to the office machine. With changing engine loads, noise also occurs due to the impact of the stops on the boundary surfaces. In the office typewriter SGE 65 from Olympia AG / DE, the engine is mounted in each case with the interposition of a damping element in engine brackets, which on the

The single-sided clamping connection is teilearm, but 'has the disadvantage that one side of the support beam loosely on the machine frame rests »This leads to swelling engine load rattling noises.With the two-sided clamp connection is indeed by the fixed support avoiding the rattling noise on the machine frame '' Ss but a higher share excessive effort and a longer assembly time associated with it. the serious Each part, however, is _s that the engine mount is destroyed by strong shock loads in radial and especially asialer direction by the large engine ground. large

-O

Jerky loads occur in portable office machines due to improper handling during transport * The noise of the engine and its vibrations are little damped and still relatively strong on the less elastic motor bracket and transferred from this to the office machine because of soft-elastic material existing respective damping element made of solid materialV

Object of the invention

The object of the invention is to provide an engine mount with damping element which can withstand high shock loads due to the mass of the installed engine with low parts and assembly costs. Furthermore, a high attenuation of noise and vibration of the engine is sought _? or the reduction of their transmission to the office machine, and a slight self - adjustment of the motor to the machine frame V. ... "

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Explanation of the essence of the invention

The invention has for its object to provide by the support and attachment of the engine brackets on the machine frame and the outer shape and reduction of the radial cross section of the damping elements a non-destructive engine mount, which dampens the engine noise and vibration and reduces their transfer to the office machine and a limited Self-adjustment of the engine in the machine frame allows, to better use the elasticity of material between the projections of the motor bracket and the cooperating slots of the machine frame is on all sides a game present the radial Quershnitt the damping element by asdLal running breakthroughs reduced «The engine bracket is only by a on one its supporting beam acting screw mounted in the machine frame and clamped under elastic deformation * For clamping is between the aforementioned support beam and another Trägerba One approach to the engine hanger is arranged / supported on the machine frame * The other carrier beam is supported in a breakthrough of the machine frame from V '

The openings of the damping element are formed as slots. They have on at least one longitudinal surface a projection which applies at high loads-on the opposite surface of the elongated hole.

The damping element has a shoulder for the system on the end shield of the engine and a collar for the system on the engine hanger. The heel is separated from the covenant by the level of breakthroughs and faces the covenant.

The webs located between the recesses of the damping element are smaller in their entire surface than the abutment surface of the damping element on the circumference of the shoulder on the end shield of the engine.

Ausiührungsbeispiel

The engine mount according to the invention will be explained with reference to drawings * In the Zeichnunssn zeisen ι

Fig. "Ti the engine mount with motor in the axial direction

_seen;

Fig. 2: the engine mount in the view T, from the side

- seen the fixing screw, '

Fig. 3: the damping element in the engine hanger with the engine

- and

FigV 4: the top view of the side of the damping element _}

- which faces the engine hanger. '

In the machine frame 1 2 engine brackets 3 are attached to the front and back of the engine. While the motor bracket 3 is advantageously made of a stronger elastic plastic material, the damping element 4 is made of a relatively soft elastic plastic material, both plastic materials are • electrically insulating »In the machine frame 1 are located. Breakthroughs la and slots 1b. The motor bracket 3 stuck with support beams 3a and 3b in the apertures 1a and'mit projections 3c in the slots ib. The slots 1b may also be formed as holes, as far as the insertion of the pre-assembled with the engine motor bracket is not difficult in the machine frame, "On the support beam 3a

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a metal plate 3d is threadedly mounted, in which a screw 5 supported on the machine frame 1 engages _{3 in} order to fix and brace the respective motor bracket 3 on the machine frame 1. The engine bracket is clamped 'by the support beam 3a is pulled by the' adjustment of the screw 5 upwards, wherein the motor bracket 3 with a lug 3e on the machine frame applies and with the other support beam 3b at the lower edge of the opening la the support beam 3a is predominantly deformed elastically In order not to exceed the strength values during clamping, the deflection is limited by the contact of the support beam 3a at the upper edge of the opening 1a. 1, the motor bracket 3 is shown in the untensioned state immediately after the screw 5 is screwed in. There is a limited play between the projections 3c and the slots To The support beams 3a, 3o, the projections 3c and the projection 3e are located on the outer ring 3f. The inner ring 3h is connected to the outer ring 3f via the webs 3g, which may also be non-circular in shape in accordance with the shape of the receiving element on the motor 2. The hexagonal projection 2a on which the front and rear end plate of the motor 2 are used as receiving elements . .Dämpfungselement 4 is attached. As already mentioned _3, the damping member 4 of relatively soft resilient plastics material, the addition of heat resistance class of the motor 2 Istv the damping element 4 is suitably temperature-resistant in its radial cross-section is not full, an optimum noise attenuation and reduction of Transmission of vibrations to achieve Breakthroughs 4a arranged in the radial direction, wherein the entire surface of the webs between the apertures 4a is smaller than the surface of the at the periphery of the neck 2a

The apertures 4a, which are advantageously designed as oblong holes, have projections 4b which, in the case of strong temporary deformations of the damping element 4, bear against the counter surface of the opening 4a due to extreme loads in the radial direction motor bracket 3 is inserted. in the insertion of damping elements 4 lie mil said collar 4c on the side faces of the motor bracket 3 at _a motor side they lie each with a shoulder 4d on the bearing plate on * the paragraph. 4ά is located below the plane of the radial cross-section-reducing openings _s 4a while the collar 4c is about * the shoulder 4d is opposite to the rear surface of the collar 4c VorV Due to the arrangement of paragraph 4d, the transmission of noise and vibration from the engine 2 to the motor bracket 3 4c to collar in this Propagation direction effective l steamed V

While the engine noise and vibrations are largely damped by the damping elements 4 and are impeded in their propagation and less by the limited to the webs 3g connection between the inner ring 3h and the outer ring 3f ₃ , the impact-like extreme radial and axial loads mainly from the engine brackets. 3 received and intercepted by the fastening in the machine frame 1 is not. "at a relatively small part of the dampening elements 4 bear by the Zusammenfedem of the openings 4a for trapping these shock loads in ·" the webs between the openings 4a v / ground thereby destroying ₃ - because the inner surfaces of the damping elements · 4 can perform only small displacements to their outer surfaces due to the mutual arrangement of the engine bracket 3 _s in the engine brackets 3 Vliegen The elasticity of the engine bracket 3 can also smaller Selbsteinsteilungen of the engine 2 to the machine frame first

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to V lifting the elastic deformation of the webs 3g and the outer ring 3f is also the game between the projections 3c and the slots 'ITd used' The possibility of self-adjustment facilitates the assembly _s since the effort for the very accurate adjustment of the engine. 2 is saved, and allows the adaptation of the motor 2 to any changes in position in the operating state,

Claims (4)

- 9 claim for invention 1 ". Insulated motor suspension with damping elements
for office machines, in particular typewriters
the motor yoke made of a stronger elastic material and the damping elements made of a relatively soft elastic material, characterized in that
intermediate projections (3c) of the motor bracket (3) and the
Slots (1b) of the Maschinenengsstelis (1) on all sides
Game and that the radial cross section of the Därnpfungselenients (4) by axially extending apertures (4a) is reduced * - 2.V protective insulated engine mount with damping elements according to item 1, characterized in that the engine bracket (3)
fastened only in the machine frame (1) by a screw (5) acting on the beam (3a) and in contact with an attachment (3e) on the machine frame (1) and a support beam (3b) in an opening (1a) of the Machine frame (1) is clamped, 3. Insulated engine mount with damping elements according to the item 1, characterized in that the openings
(4a) -in the damping element (4) are formed as slots, at least on a longitudinal surface a projection
(4b) we are. ' 4V insulated motor suspension with damping elements according to items 1 and 3, characterized in that the motor ' (2) bears with the bearing plate on a shoulder (4d), the
through the plane of the apertures (4a) of the engine bracket (3) adjacent collar (4c) is separate and this opposite. - 231336 4 5. Protective insulation engine suspension with damping elements according to points 1 and 3, characterized in that the total area of the webs between the openings (4 &) is small than the contact surface of the damping element (4) at the periphery of the neck (4). 2a). For this -2-page drawings O ^