Hitachi H 45SR, Технические данные и руководство по обслуживанию

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Fig. 5
Fig. 6
8-2. Idling-Proof Mechanism
When the bull point is released from the concrete surface, sleeve (A) and the second hammer are forcibly moved
to the position illustrated in Fig. 5 by spring (C), and the striker moves out of striking position. When this occurs,
the air holes located at the position unaffected by the rebound of the striker at no load are opened and the
pressure within the air chamber remains unchanged even though the piston continues to reciprocate, thereby
preventing striking operation.
Second hammer
Striker
Sleeve (A)
Spring (C)
Air hole
Forward movement of
second hammer & striker
Air
chamber
8-3. Shock-Absorbing Mechanism
At the instance of releasing the bull point from the concrete by moving the main body up, the second hammer
contacts hammer holder (A) as shown in Fig. 6 then the cushion (damper (A)) provided between hammer holder
(A) and the front cover absorbs the striking force of the second hammer. Thus the durability of the Model H 45SR
is increased greatly because the second hammer does not strike the tool retainer directly.
Hammer holder (A)
Damper (A)
Second hammer