JP3279541B2 - Portable work machine bearing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to a bearing device for a portable work machine, in particular to the preamble of claim 1.

[0002]

2. Description of the Prior Art German Patent Publication No. 19,608,793.
The publication discloses a work machine, especially a pruning machine, which is portable on the back, comprising a support plate for a driving motor having a substantially triangular portion having a peripheral portion surrounding the boss and a boss portion disposed in a central region thereof. Has been described.

[0003] The support plate functions as a resilient mounting of the drive motor and its pivoting device, which elastically supports the drive motor and ensures flexible operation of the mowing machine. The support plate is formed as a heavily welded steel plate structure, which is a disadvantage, especially in the case of portable machines.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to propose a support plate for a drive motor of a manually operated pruner which is light in weight and simple to manufacture.

[0005]

SUMMARY OF THE INVENTION According to the present invention, the support plate is constructed as an integral light cast part, and the boss is reinforced by ribs connecting it to the peripheral edge. This is solved by the fact that the inner and outer peripheral edges of the ribs are alternately connected by the outer surface and the inner surface.

By integrally forming the support plate by light metal casting, the assembly process and the weld seam are eliminated. Thereby, the structural costs and the risk of temporal damage are reduced. The ribs ensure the required stiffness.

[0007] Pressure casting with magnesium or synthetic materials reduces the weight of the support plate. The same applies to the configuration of the support plate according to the claims, comprising a rounded perimeter surrounding it and a rib tapering towards this perimeter. ADVANTAGE OF THE INVENTION According to this invention, the peripheral part of an adjacent rib is alternately joined by the outer side surface and the inner side surface, and the substantially corrugated-shaped, highly closed and highly rigid support plate is obtained.

The first pair of ribs, which are directed to the corners of the support plate and reach the boundary surface, increase the bending rigidity of the support plate in the main stress direction. Circular openings, which are configured as converging openings in the three corner areas of the support plate, serve for assembling and mounting the elastic elements for elastic mounting of the drive motor.

The connection between the outer boss portion and the inner boss portion via the radial web prevents excessive accumulation of material in the area of the boss and the associated formation of casting shrinkage cavities. You.

Further features of the invention are evident from the dependent claims, the following description and the figures illustrating an embodiment of the invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

FIG. 1 shows the inner part 2 of the support plate 1. The support plate 1 has a substantially triangular shape. The support plate 1 has a central boss 3 from which the ribs extend in a substantially uniform distribution radially, i.e. radially, to a peripheral edge 4. At this time, the first rib 5
Each extend in pairs to the three corner areas of the support plate 1 and the second ribs 6 extend in pairs to the area between the corners of the surrounding rim 4 respectively. ing.

In the three corner areas, a circular opening 7 is provided with holes 8 spaced apart therefrom. The boss portion 3 includes an outer boss portion 9 and an inner boss portion 10 coaxial with the outer boss portion 9. Both boss parts 9, 10
They are connected to one another via a radial web 11 and a collar 12 (see FIG. 3). The intermediate space between the boss parts 9, 10 prevents the formation of casting shrinkage cavities that can occur due to material accumulation.

FIG. 2 shows a circular web 7 with a radial web 11, a surrounding rim 4 and a hole 8.
And the ribs 5 and 6
Is shown.

As an extension of the boss 3, an inner ring step 13 of a ball bearing (not shown) is provided. The inner ring is fixed to the boss 3 by a fixing screw (not shown) which can be screwed into a screw hole 14 coaxial with the boss 3.

A peripheral edge 4 surrounding the periphery has a cylindrical portion 15 perpendicular to a boundary surface 16 bounding the inner portion 2,
It comprises a portion 17 which is bent 90 ° with respect to the boss 3. The two portions 15 and 17 of the peripheral portion 4 are combined with the boss 3
Is almost half the height of

The circular opening 7 is configured as a merging opening. The opening 7 has a flat recess 18 together with the hole 8.
And oriented perpendicular to the interface 16.

The ribs 5, 6 are also arranged perpendicular to the interface 16 and reduce their height from the boss 3 to the surrounding rim 4. The second rib 6 has the shape of an acute isosceles triangle, the bottom of which is at the boss 3,
The sides form the inner and outer edges 21, 22, the vertices of which terminate in the inner contour of the bent part 17 of the surrounding rim 4. On the other hand, the height of the first rib 5 reaches the interface 16 over its entire length, whereby a high resistance moment is generated in the direction of the main stress.

Inner and outer peripheral edges 21, 22 of adjacent ribs 5, 6
Are alternately connected to each other by an outer surface 19 and an inner surface 20 and to the surrounding bent portion 17 of the peripheral edge 4 and to the outer boss portion 9. This produces a closed support plate 1 having a flexurally rigid, substantially corrugated surface.

FIG. 3 shows the outer boss portion 9 and the inner boss portion 1.
The boss portion 3 having 0 is shown in a section. The inner and outer boss portions are connected to each other via a radial web 11 (see FIG. 1) and a collar portion 12. further,
A part of the inner surface 20 is shown in cross section and the cylindrical part 1
5 shows the peripheral edge 4 with 5 and a bent portion 17.

FIG. 4 is a perspective view showing an outer portion of the support plate 1. The figure shows a boss 3 with a step 13 and a peripheral part 4 with a cylindrical part 15 and a bent part 17 and a circular opening 7 with a hole 8 attached to a recess 18. A part of the first rib 5 and the second rib 6,
And an outer surface 19 and an inner surface 20 connecting them.
Is shown.

The material magnesium of the support plate 1 and its shape according to the invention reduce the weight and at the same time obtain a high bending stiffness, especially at the main load surface between the boss 3 and the circular opening 7. The reduction in weight is particularly advantageous for portable machines. The cast structure selected is cost effective and durable.

[Brief description of the drawings]

FIG. 1 is a diagram showing an inner portion of a support plate.

FIG. 2 is a sectional view of the support plate taken along line AA of FIG.

FIG. 3 is a sectional view of the support plate taken along line BB of FIG. 1;

FIG. 4 is a perspective view showing an outer portion of the support plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Support plate 2 Inner part 3 Boss part 4 Peripheral part surrounding the circumference 5 First rib 6 Second rib 10 Inner boss part 11 Radial web 12 Collar part 14 Screw hole 15 Cylindrical part 16 Boundary surface 17 Bending Part 18 Recessed part 19 Outer wall part 20 Inner wall part 21 Outer edge 22 Inner edge

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A01D 34/67-34/685 F16M 5/00

Claims (10)

(57) [Claims] 1. A portable work comprising a drive motor support plate (1) having a substantially triangular portion with a peripheral edge (4) surrounding it and a boss portion (3) located in the central area thereof. In a bearing device for a machine, in particular a pruner, a plant sprayer or the like, the support plate (1) is constructed as an integral light cast part and the boss (3) connects the rib (6) to the periphery. )
And inner and outer peripheral edges (21, 22) of adjacent ribs (5, 6) are alternately connected by an outer surface (19) and an inner surface (20). . 2. The bearing device according to claim 1, wherein the support plate (1) is formed as a pressure-cast component made of magnesium. 3. A peripheral edge (4) surrounding the periphery reaches a boundary surface (16) bounding the inner portion (2) of the support plate (1), and extends toward the boss (3). Claim: 1 characterized in that it has a cylindrical part (15) which transitions into a 90 ° bent part (17), wherein both parts (15, 17) have half the height of the boss (3). Item 3. The bearing device according to item 1 or 2. 4. A first rib (5) and a second rib extending radially from a boss (3) to a peripheral edge (4).
4. A bearing device according to claim 1, wherein the ribs (6) are provided. 5. The first ribs (5) each extend in pairs to a range of three corners of the support plate (1), and the second ribs (6) surround each other in pairs. The bearing device according to claim 4, characterized in that it extends to a range between the corners of the peripheral edge (4). 6. The method according to claim 4, wherein the height of the ribs (5, 6) decreases from the boss (3) toward the surrounding edge (4). Bearing device. 7. The second rib (6) is formed as an acute isosceles triangle with the boss (3) being the base and the inner and outer peripheries (21, 22) being the sides, and the vertex of the triangle is the periphery ( 7. The bearing device according to claim 6, wherein the end of the bent portion (17) of (4) ends in the inner contour. 8. The bearing device according to claim 6, wherein the first rib extends over its entire length to the boundary surface. 9. In each of the three corners of the support plate (1), a flat recess (18) on the outer surface (19) is formed as a junction opening and directed to the boundary surface (16). 9. The bearing device according to claim 1, wherein a circular opening (7) is provided. 10. An inner boss portion (10) wherein the boss (3) has a threaded hole (14) coaxial with the outer boss portion (9).
And these boss portions are radial webs (11).
10. The bearing device according to claim 1, wherein the bearing device is connected to each other via a collar and a collar.