JPH0646255Y2 - Connection structure between rod and housing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a mower having, for example, a rod gripped by an operator and a clutch housing in which a base end portion of the rod is fitted and connected via a cylindrical rubber damper. The present invention relates to a connection structure of a rod and a housing that can be applied to the like.

(Prior Art) A cylindrical rubber damper is interposed between the base end of the rod of a conventional mower and the boss cylinder of the clutch housing. It is connected to the clutch housing via a rubber damper. In that case, in order to prevent the rubber damper from rotating and coming off, a low box-shaped protrusion is formed on the outer peripheral surface of the rubber damper in the longitudinal direction, and this protrusion is placed inside the window provided on the cylinder part of the clutch housing boss. The one fitted from is already adopted. However, when the rubber damper is mounted in the clutch housing, the protrusion has to be forcibly fitted into the window hole in a state where the rubber damper is deformed so as to reduce the diameter, which is troublesome for assembling. Also, the die casting mold for making the clutch housing becomes complicated. That is, since it is necessary to open a window in the boss cylinder of the clutch housing, a core that can be pulled out in the lateral direction must be provided.

(Object of the Invention) An object of the present invention is to provide a connection structure capable of reliably preventing the rubber damper from rotating and coming off while preventing the die-cast type of the clutch housing from becoming complicated.

(Structure of the Invention) The present invention has a rod and a housing in which the base end portion of the rod is fitted and connected via a cylindrical rubber damper, wherein the rubber damper is fitted along the rod and along the rod. A split groove for tightening that is opened to the tip side of the is provided, and a longitudinal projection that is integrally provided on the outer peripheral surface of the rubber damper is inserted into the split groove, and a tightening bolt that crosses the split groove is provided on the projection. Alternatively, the connection structure between the rod and the housing is characterized in that the rubber damper is retained through the notch.

(Example) In FIG. 1, 1 is an engine, 2 is a rod gripped by an operator, and 3 is a disc-shaped cutting blade. The rod 2 is provided with a grip 4 to be gripped by an operator, a loop handle 5, a hanger 6 for the operator to hang on the shoulder, a shoulder band 7, etc., and the base end 2a is provided with a clutch housing 11 via a cylindrical rubber damper 10. Insert it into the boss cylinder part 11a of the
By tightening in the direction in which the interval is narrowed by
2a and the boss cylinder portion 11a are firmly connected. 14 is a clutch drum and 15 is a flexible shaft.

2 to 4 showing the clutch housing portion, a pair of thick flanges 17 are integrally provided on both sides of the split groove 12 of the boss cylinder portion 11a, and the flange 17 has a boss cylinder portion.
A screw hole 18 and a cutout hole 19 which are orthogonal to the longitudinal direction of 11a are provided. A longitudinal projection 20 (spacer) protruding from the outer peripheral surface of the rubber damper 10 is fitted in the split groove 12, and is tightened through a notch 21 (FIGS. 5 and 6) and a through hole 19 provided in the projection 20. The bolt 13 is inserted, and the bolt 13 is screwed into the screw hole 18. Install the rubber damper 10 in the boss cylinder 11a as shown by arrow A in FIG.
The split groove 12 is open toward the reverse A direction (left side) in FIG. 2 so that it can be inserted in the direction.

To connect the rod 2 and the clutch housing 11, the rubber damper 10 is previously inserted in the boss cylinder portion 11a of the clutch housing 11 in the direction of arrow A in FIG. At that time, the protrusion 20 on the outer peripheral surface of the rubber damper 10 is fitted into the split groove 12. Second rubber damper 10
When you insert it up to step 22 in the figure, cutout 21 and flange of protrusion 20
The 17 holes 19 are aligned. When the base end 2a of the rod 2 is inserted into the rubber damper 10 in this state and the bolt 13 is tightened, the diameter of the rubber damper 10 is reduced and the clutch housing boss cylinder 11
The base end portion 2a of the rod 2 can be elastically supported in a floating state.

(Effects of the Invention) As described above, according to the present invention, the split groove 12 for tightening that opens along the rod 2 and to the tip side of the rod 2 is formed on the boss cylinder portion 11a of the clutch housing 11 into which the rubber damper 10 is fitted. And a longitudinal projection 20 integrally provided on the outer peripheral surface of the rubber damper 10 is fitted in the split groove 12, and a tightening bolt 13 that traverses the split groove 12 is passed through a hole or notch 21 provided in the projection 20. Rubber damper 10
The clutch housing 11
The work of inserting the rubber damper 10 inside becomes extremely easy. That is, before inserting the bolt 13, attach the rubber damper 10 to the second
It may be inserted in the direction of arrow A in the figure. Also clutch housing 11
The die-casting mold for molding is preferably a two-piece structure that opens in the left-right direction in FIG. 2, eliminating the need for a core to be pulled out in the lateral direction, and simplifying the structure of the die-casting mold. The protrusion 20 can be integrally formed at the same time as the main body of the rubber damper 10, and the split groove 12 need only be a little wider than the conventional split groove.
Easy to manufacture.

Although a hole may be provided in a part of the protrusion 12, it can be easily formed by notching the end edge as shown in the drawing and using it for retaining.

[Brief description of drawings]

FIG. 1 is a schematic side view of a vertical section of a grass wing machine to which the present invention is applied,
2 is a longitudinal sectional view of the clutch housing portion in FIG. 1, and FIGS. 3 and 4 are views taken in the direction of arrows III and IV in FIG. 2, respectively.
FIG. 5 is a vertical sectional view of the rubber damper, and FIG. 6 is a view taken in the direction of arrow VI of FIG. 2 ... rod, 2a ... base end, 10 ... rubber damper, 11 ...
Clutch housing, 12 …… Split groove, 13 …… Tightening bolt,
20 …… Protrusion, 21 …… Notch

Claims (1)

[Scope of utility model registration request] 1. A rod having a housing and a housing in which a base end portion of the rod is fitted and connected via a cylindrical rubber damper, wherein the rubber damper fits along a boss cylinder portion of the housing and a distal end side of the rod. A split groove for tightening that is opened to the inside is provided, and a projection in the longitudinal direction that is integrally provided on the outer peripheral surface of the rubber damper is inserted into the split groove, and a tightening bolt that traverses the split groove is inserted in the hole or notch provided in the projection. The connection structure between the rod and the housing is characterized in that the rubber dampers are retained through the stoppers.