Title:
WORK MACHINE
Document Type and Number:
WIPO Patent Application WO/2023/189401
Kind Code:
A1
Abstract:
The present invention improves cooling performance. In a hammer drill body 10, a dust collection port 22A, a first air intake port 22B, and a second air intake port 22C are formed in a lower housing section 22, and an exhaust port 23A is formed in an upper housing section 23 that houses a transmission mechanism 50. A fan 62 having a cooling fan 63 and a dust collection fan 65 is provided in the lower housing section 22. Cooling air W1 is generated by rotation of the cooling fan 63, and dust collection air W2 is generated by rotation of the dust collection fan 65. Here, a fan guide 70 is provided in the lower housing section 22, and the fan guide 70 has rectification elements 76-1 to 76-5. The rectification elements 76-1 to 76-5 rectify the cooling air W1 blown from the cooling fan 63 and the dust collection air W2 blown from the dust collection fan 65, and cause the cooling air W1 and the dust collection air W2 to flow to the exhaust port 23A. This allows for cooling of the transmission mechanism 50 disposed in the upper housing section 23.
Inventors:
TAGAMI HIROYUKI (JP)
ICHIHASHI NAOTO (JP)
ICHIHASHI NAOTO (JP)
Application Number:
PCT/JP2023/009233
Publication Date:
October 05, 2023
Filing Date:
March 10, 2023
Export Citation:
Assignee:
KOKI HOLDINGS CO LTD (JP)
International Classes:
B25D17/18; B23B47/34; B23Q11/00; B25F5/00
Foreign References:
| JP2020104218A | 2020-07-09 | |||
| JP2021186924A | 2021-12-13 |
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