Concrete vibrator

Patent metadata

Field	Value
Publication number	US-12366077-B2
Application number	US-202217676906-A
Country	US
Kind code	B2
Filing date	Feb 22, 2022
Priority date	Mar 12, 2021
Publication date	Jul 22, 2025
Grant date	Jul 22, 2025

Abstract

A concrete vibrator can further reduce vibration. The concrete vibrator includes a motor, a flexible shaft drivable by the motor, an unbalanced weight drivable with the flexible shaft, a flexible hose at least partially covering the unbalanced weight and the flexible shaft, a body housing accommodating the motor, and an elastic member between the body housing and the flexible hose.

First claim

What is claimed is:

1. A concrete vibrator, comprising:
a motor;
a shaft drivable by the motor;
an imbalance member drivable with the shaft;
a hose at least partially covering the imbalance member and the shaft;
a housing accommodating the motor; and
a holder attached to a front end of the housing;
an elastic member between the housing and an outer surface of the holder.

2. The concrete vibrator according to claim 1 , wherein
the elastic member has a ring shape.

3. The concrete vibrator according to claim 1 , wherein
the elastic member has a half ring shape.

4. The concrete vibrator according to claim 1 , wherein
the hose includes a hose holder,
the holder is connected to the hose with the hose holder, and
the elastic member is in contact with the housing.

5. The concrete vibrator according to claim 1 , wherein
the elastic member is in contact with the holder on an outer surface of the elastic member, and the outer surface excludes a radially outward outer side surface of the elastic member.

6. The concrete vibrator according to claim 5 , wherein
the elastic member includes a protrusion on the outer surface in contact with the holder.

7. The concrete vibrator according to claim 1 , wherein
the elastic member is in contact with the housing, and
the housing has one or more recesses on a surface of the housing in contact with the elastic member.

8. A concrete vibrator, comprising:
a motor including a rotational motor shaft;
a housing accommodating the motor;
a spindle connected to the motor shaft;
a flexible shaft drivable with the spindle;
an imbalance member drivable with the flexible shaft;
a hose at least partially covering the imbalance member and the flexible shaft, the hose being movable relative to the housing;
a coupling between the rotational motor shaft and the spindle, the coupling including,
a front hub connected the spindle,
a rear hub connected to the rotational motor shaft, and
an elastic element between the front hub and the rear hub.

9. The concrete vibrator according to claim 8 , wherein
the front hub and the rear hub include hub tabs, and
the elastic element has grooves receiving the hub tabs.

10. The concrete vibrator according to claim 4 , wherein
the elastic member is in contact with the holder on an outer surface of the elastic member, and the outer surface excludes a radially outward outer side surface of the elastic member.

11. The concrete vibrator according to claim 2 , wherein
the elastic member is in contact with the housing, and
the housing has one or more recesses on a surface of the housing in contact with the elastic member.

12. The concrete vibrator according to claim 3 , wherein
the elastic member is in contact with the housing, and
the housing has one or more recesses on a surface of the housing in contact with the elastic member.

13. The concrete vibrator according to claim 1 , wherein
the holder includes
a front flange protruding radially outward, and
a rear flange protruding radially outward, the rear flange disposed rearward from the front flange, and

the elastic member is disposed between the front flange and the rear flange.

14. The concrete vibrator according to claim 1 , further comprising:
a spindle connected to the shaft; and
a bearing holding the spindle,
wherein the holder holds the bearing.

15. The concrete vibrator according to claim 1 , wherein the holder being coaxial with the hose.

Assignees

• Makita Corp

Inventors

• Yueda Ryuki

Classifications

• B01F31/44 Primary

  with stirrers performing an oscillatory, vibratory or shaking movement (B01F31/40, B01F31/42 take precedence) · CPC title

• B01F35/3204

  Motor driven, i.e. by means of an electric or IC motor · CPC title

• B01F2101/28

  Mixing cement, mortar, clay, plaster or concrete ingredients · CPC title

• H02K7/063

  integrally combined with motor parts, e.g. motors with eccentric rotors · CPC title

• E04G21/08 Primary

  Internal vibrators {, e.g. needle vibrators (combined with vacuum E04G21/061)} · CPC title