JPH077805U - Vibrating drill - Google Patents

Abstract

(57) [Summary] [Object] The present invention can suppress the temperature rise of the holder by providing the holder in the cooling air passage and prevent the housing from melting. [Structure] The temperature rise of the holder 6 is suppressed by hitting the ribs 6a provided on the holder 6 with cooling air.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an impact tool such as a vibration drill.

[0002]

[Prior art]

 The conventional vibrating drill will be described with reference to FIG. 4. When the tip tool 11 attached to the chuck of the vibrating drill is pressed against the work material, the ratchet 4 a provided on the gear 4 and the holder 6 are integrally assembled. The ratchet 5 engaged with each other causes the tip tool 11 to vibrate by reciprocating the spindle 2 in the axial direction of the tool.

[0003]

[Problems to be solved by the device]

 In conventional vibration drills, when the tip tool is pressed against the work material, the ratchet installed on the gear of the gear mechanism and the ratchet integrated in the holder violently mesh and vibrate the tip tool. Was there. For this reason, heat is generated in the ratchet portion, so the holder in which the ratchet is integrally incorporated is formed of a metal material.

When a hole is drilled for a long time, there is a problem that the heat generated in the ratchet is transmitted through the metal holder and the housing around the holder is melted.

An object of the present invention is to prevent the housing from melting due to the heat generated by the ratchet engagement.

[0006]

[Means for solving the problem]

 In order to achieve the above object, the present invention is achieved by providing a holder in a cooling air passage so that the surface of the holder receives cooling air.

[0007]

[Action]

 When the holder configured as described above is exposed to the cooling air, it operates so as to remove heat from the holder.

[0008]

【Example】

 An embodiment will be described with reference to the drawings. FIG. 1 is a vertical sectional side view of a vibrating drill incorporating a holder having a rib according to an embodiment of the present invention. FIG. 2 is a perspective view showing the outer shape of a holder having ribs. In the figure, a rib 6a is provided on the back surface of the holder 6, and a part of the cooling fan 9 is covered with an arc. Therefore, the cooling air generated by the rotation of the cooling fan 9 absorbs heat while hitting the holder 6 and the ribs 6a, and is discharged from the wind window 7c provided in the housing 7.

1 and 2, the holder 6 is provided with the rib 6a, but as shown in FIG. 3, the rib 7a provided with the cooling fan 9 near the holder 6 and the space surrounded by the holder 6, That is, the same effect can be obtained by disposing the cooling air in the air passage.

[0010]

[Effect of device]

 According to the present invention, the holder is cooled, so that the melting of the housing can be prevented.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of a vibrating drill according to an embodiment of the present invention.

FIG. 2 is a perspective view showing an appearance of a holder having a rib according to the present invention.

FIG. 3 is a vertical sectional side view of a vibration drill according to another embodiment of the present invention.

FIG. 4 is a vertical sectional side view showing a conventional vibration drill.

[Explanation of symbols]

1 is a chuck, 2 is a spindle, 3 is a ball bearing, 4 is a gear, 4a is a ratchet part, 5a is a ratchet part, 6 is a holder, 6a is a rib, 7 is a housing, 7a is a rib, 7b is a rib, and 7c is a wind window. , 8 is a motor, 9 is a fan, and 10 is a push button.

Claims (4)

[Scope of utility model registration request] 1. A motor having a cooling fan that is driven to rotate by the supply of electric power, a gear mechanism unit that transmits the rotation of the motor to a tip tool, a rotary ratchet provided on the gear mechanism unit, and the rotary ratchet. In a vibrating drill including a metal holding member having a fixed ratchet that meshes with a resin housing containing the metal holding member and the like, and an outlet provided in the resin housing for discharging cooling air. A vibrating drill, wherein the metal holding member is provided in an air passage of the cooling air. 2. The vibration drill according to claim 1, wherein the metal holding member is provided with a protrusion. 3. The vibration drill according to claim 2, wherein the protruding portion of the metal holding member is a partition wall forming a part of the air passage. 4. The vibration drill according to claim 1, wherein the partition wall forming the air passage is formed by a rib provided on the housing.