JP3195437U - Torsional vibration absorption structure - Google Patents

Abstract

A torsion vibration absorbing structure having a simple structure, a small occupied volume, and a low implementation cost is provided. A torsion vibration absorbing structure includes an outer tube and an inner tube. The inner tube 12 is coaxially installed in the outer tube 11, the cross sections of the outer tube 11 and the inner tube 12 are uniformly polygonal, and there are a plurality of elasticities between the tube walls of the outer tube 11 and the inner tube 12. A mat 13 is installed. In the present invention, a plurality of elastic gel bodies are installed between the outer tube 11 and the inner tube 12, thereby buffering the amount of vibration between the outer tube 11 and the inner tube 12 by a torsion method, thereby reducing the vibration effect. To achieve. Therefore, in addition to the vibration reduction for the axial force, the vibration reduction in each angle direction is also achieved. [Selection] Figure 1

Description

  The present invention relates to a torsional vibration absorbing structure that achieves a vibration reduction effect by buffering the amount of vibration by a torsion method.

  Many conventional vibration absorbers, especially those applied to automobiles, use a spring structure to achieve the purpose of vibration reduction. The spring structure installed between the seat or tire and the shelf board suppresses impacts and vibrations from bad roads.

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  However, there is room for improvement in the seismic reduction effect of the spring structure, in particular, with the above-described conventional vibration reduction technology. By the way, since the vibration reduction by the spring is limited to the axial vibration reduction, the space of a certain height in the axial direction is occupied, making it difficult to reduce the size of the vibration reduction structure. In addition, there is a problem that the structure of the spring structure is complicated and the implementation cost is high.

  Therefore, the present inventor considered that the above-mentioned drawbacks can be improved, and as a result of intensive studies, the present inventor has come up with a proposal for the present invention to effectively improve the above-described problems by rational design.

  The present invention has been made to solve the above-described conventional problems, and in order to solve the above problems, the present invention mainly aims to provide a torsion vibration absorbing structure. In other words, the application of the seismic reduction structure is not limited to the axial direction, but can be applied to different angles. At the same time, the structure is simplified, the occupied volume is small, and the implementation cost is low.

  In order to solve the above-described problems and achieve the object, a torsional vibration absorbing structure according to the present invention includes an outer tube and an inner tube, and the inner tube is installed coaxially in the outer tube, and the outer tube and A cross section of the inner pipe is uniformly polygonal, and a plurality of elastic mats are installed between the outer pipe and the pipe wall of the inner pipe.

  According to the present invention, a plurality of elastic gel bodies are installed between the outer tube and the inner tube, so that the amount of vibration is buffered by the torsion method to achieve the vibration reduction effect. As a result, it is possible to reduce the vibration in the direction of each angle in addition to the vibration reduction in the axial direction. Further, the present invention is greatly different from the conventional structure, and has the advantages that the structure is simplified, the occupied volume is small, and the implementation cost is low.

1 is an external perspective view showing a torsion vibration absorbing structure according to a first embodiment of the present invention. It is sectional drawing of the torsion vibration absorption structure which concerns on 1st embodiment of this invention. It is an external appearance perspective view which uses the torsion vibration absorption structure of this invention for the shelf board of a walk auxiliary vehicle. FIG. 4 is a partial development view shown in FIG. 3. FIG. 4 is another partial development view shown in FIG. 3. 1 is a schematic external view of a part in which an embodiment of the present invention is applied to a walking auxiliary vehicle.

  Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings. The present invention is not limited to the embodiments described below.

  First, a first embodiment of the torsion vibration absorbing structure of the present invention will be described. The configuration of the first embodiment of the present invention is shown in FIGS. As shown in FIGS. 1 and 2, the preferred embodiment of the torsional vibration absorbing structure 10 of the present invention includes an outer tube 11 and an inner tube 12. The outer tube 11 is hollow and the inner tube 12 is an outer tube 11. The outer tube 11 and the inner tube 12 have a uniform polygonal cross section, and a plurality of elastic mats 13 are installed between the tube walls of the outer tube 11 and the inner tube 12. . Both the outer tube 11 and the inner tube 12 according to the embodiment have a rectangular parallelepiped shape, the cross section is a uniform square, and the inner tube 12 is rotated by 45 ° with respect to the outer tube 11, and the edge of the inner tube 12 is outer. It faces the tube wall of the tube 11. Each elastic mat 13 is installed between the edge of the outer tube 11 and the tube wall of the inner tube 12, and the inner tube 12 is hollow, and an object is installed and combined. The number of the elastic mats 13 is four, and is installed on the average between the edge of the outer tube 11 and the tube wall of the inner tube 12, and the axial length of the inner tube 12 is the axial direction of the outer tube 11. The one end or two ends of the inner tube 12 protrudes from the outer tube 11.

  The above is description of the main members and form which concern on embodiment of this invention. FIGS. 1 to 4 illustrate usage and effects according to an embodiment of the present invention. The torsional vibration absorbing structure 10 according to the present invention is applied to a rear wheel of a walking assistance vehicle. The walking auxiliary vehicle includes a shelf board 20, front wheels 40 and rear wheels 50 are respectively installed at the front end and the rear end of the shelf board, and the rod body 21 extends from the rear end of the shelf board 20 along the vehicle width direction. The two ends of the rod body 21 are connected to the torsion vibration absorbing structure 10 according to the present invention. The rod body 21 is a rectangular rod and is inserted into the hollow inner tube 12, the outer tube 11 is covered with an insertion tube 22, and a connecting rod 23 extends backward from the insertion tube 22. Then, the connecting rod 23 is coupled to the rear wheel 50. For this reason, the rear wheel 50 is suspended independently from the shelf 20 by the insertion tube 22 and the torsion vibration absorbing structure 10.

  Next, the position limiting plate 24 is covered at both ends of the torsional vibration absorbing structure 10 of the rod body 21 according to the embodiment, and the position limiting plate 24 positioned on the inner side is welded to the rod body 21 and the outer side. The position limiting plate 24 positioned at is fixed by being screwed by a fixing bolt 25. An inner thread iron plate 26 is welded in the rod body 21 and is combined with the inner thread iron plate 26 by a fixing bolt 25 to restrict axial movement of the torsion vibration absorbing structure 10 on the rod body 21. .

  In the present invention, the torsion vibration absorbing structure is used when the rear wheel 50 passes through the uneven road surface, in addition to replacing the conventional spring member installed between the seat and the shelf board by installing the torsion vibration absorbing structure 10. 10 achieves buffering and vibration reduction between the rear wheel 50 and the shelf 20 by swinging the rear wheel 50 in the height direction, and the vibration is transmitted to the shelf 20 and does not affect the passenger sitting on the seat. Like that. Incidentally, the structure of the torsion vibration absorbing structure 10 is not only a vibration reducing effect in the height direction, but also a so-called vibration reducing effect that achieves a vibration reducing effect if the force applied is parallel to the connecting rod 23 or the rod body 21. It has the feature of fullness of earthquake direction and good seismic reduction effect. In addition, the torsional vibration absorbing structure 10 occupies a smaller space than the conventional spring member, and is advantageous for downsizing the walking assistance vehicle.

  In particular, in the present invention, the elastic mat 13 installed between the outer pipe 11 and the inner pipe 12 is used as a vibration reducing member, so that the present invention generates almost no noise during buffering and vibration reduction compared to the conventional spring member. It has a silent effect.

  In addition, as shown in FIGS. 5, 6, and 1 to 3, the torsion vibration absorbing structure 10 according to the present invention is applied to the front wheel 40 of the walking assist vehicle by a different installation method. As shown in the figure, an insertion tube 31 having a tubular structure is installed on two sides of the front end of the shelf plate 20 in the vehicle width direction, and the insertion tube 31 has a square tube structure. The torsion vibration absorbing structure 10 according to the invention is covered. A suspension arm 32 is connected and fixed to the two ends of the inner tube 12 of the torsional vibration absorbing structure 10. The suspension arm ends of the two suspension arms 32 are connected by a shaft 33, and the shaft 33 extends outward in the vehicle width direction. The first connecting arm 34 is extended toward the front, the front wheel 40 is mounted on the first connecting arm 34, and the front wheel 40 is pivotally mounted on the suspension arm 32 by the shaft 33.

  As a result, on the uneven road surface, the suspension arm 32 swings in the height direction due to the torsional vibration absorbing structure 10, and the shaft 33 holds the front wheel 40 perpendicular to the road surface, and the suspension arm 32 swings the front wheel 40. Inclined so that it does not stand on the road surface. In order to prevent the shaft 33 from arbitrarily swinging with respect to the suspension arm 32, a second connecting arm 35 extends upward in the height direction of the shaft 33, and the second connecting arm 35 has a vehicle width direction. A third connecting arm 36 extending along the axis is hinged to the shelf board 20. As a result, the shelf board 20, the suspension arm 32, the second connection arm 35, and the third connection arm 36 constitute a quadrilateral equilibrium structure, and the front wheel 40 and the suspension arm 32 swing up and down with respect to the shelf board 20. Achieving buffering and vibration reduction effects. Further, the shaft 33 is effectively prevented from swinging arbitrarily, and the front wheel 40 is suspended independently from the shelf 20 by the torsion vibration absorbing structure 10 and the suspension arm 32.

  Further, regarding the installation of the suspension arm 32, a square tube 15 is further drilled in the inner tube 12 of the torsion vibration absorbing structure 10, and a rectangular concave hole 321 is installed in the suspension arm 32 and the square tube 15 is provided. Installed. After the bolt 37 has penetrated the suspension arm 32, the suspension arm 32 is screwed with a nut 38 to fix the suspension arm 32 to the square tube 15. Naturally, without using the square tube 15, the inner tube 12 of the torsion vibration absorbing structure 10 extends along the axial direction from the outer tube 11, and the rectangular concave hole 321 of the suspension arm 32 extends into the outer tube 11. The inner tube 12 may be directly covered.

  Note that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 10 Torsional vibration absorption structure 11 Outer tube 12 Inner tube 13 Elastic mat 15 Square tube 20 Shelf plate 21 Rod body 22 Insertion tube 23 Connecting rod 24 Position limit plate 25 Fixing bolt 26 Inner thread iron plate 31 Insertion tube 32 Suspension Arm 321 Recessed hole 33 Shaft 34 First connecting arm 35 Second connecting arm 36 Third connecting arm 37 Bolt 38 Nut 40 Front wheel 50 Rear wheel

Claims (6)

  An outer tube and an inner tube are provided, and the inner tube is coaxially installed in the outer tube, and the outer tube and the inner tube have a uniform polygonal cross section. The outer tube and the inner tube A torsional vibration absorbing structure characterized in that a plurality of elastic mats are installed between the walls.   The torsion vibration absorbing structure according to claim 1, wherein the outer tube and the inner tube are equally rectangular.   The inner tube is rotated by 45 ° with respect to the outer tube, and the edge of the inner tube and the tube wall of the outer tube face each other, and each elastic mat is located between the edge of the outer tube and the tube wall of the inner tube. The torsional vibration absorbing structure according to claim 2, wherein the torsional vibration absorbing structure is installed on the torsional vibration absorbing structure.   The torsional vibration absorbing structure according to claim 3, wherein the inner tube is hollow.   The torsional vibration absorbing structure according to claim 3, wherein the number of the elastic mats is four, and the elastic mats are installed on an average between the outer tube and the inner tube.   The torsional vibration absorbing structure according to claim 3, wherein the axial length of the inner tube is longer than the axial length of the outer tube.