Chain saw with saw chain tension device
A tensioning device and saw chain technology, which is applied in the field of chain saws, can solve problems such as saw chain falling off, and achieve the effects of labor-saving operation, good stability, and low manufacturing cost
Active Publication Date: 2012-05-02
POSITEC POWER TOOLS (SUZHOU) CO LTD
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AI Technical Summary
Problems solved by technology
Since there is no anti-loosening structure in the tensioning assembly, the chain plate changes from a compressed state to a loose state due to factors such as vibration during normal operation of the chain saw, causing the saw chain to fall off the chain plate and causing danger
Method used
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Embodiment Construction
[0037] refer to figure 1 As shown, the chain saw 5 involved in the specific embodiment of the present invention includes a housing 6, and a sprocket 7 for driving the saw chain 11 is rotatably supported in the housing 6, wherein the sprocket 7 is driven by a transmission The device is driven to rotate by a power device (not shown in the figure), and the power drive device can be set as a motor or an engine. The chain saw 5 also includes a chain plate 9, one end of the chain plate 9 is supported in the housing 6, and the other end extends out of the housing 6 in the longitudinal direction of the chain plate 9, and the saw chain 11 is sleeved on the sprocket 7 And on the chain plate 9, and can be guided along the chain plate 9 edge circulation. In order to adjust the tension of the saw chain 11, the chain plate 9 can move relative to the housing 6 along the longitudinal extension direction of the chain plate 9, so that the distance between the chain plate 9 and the sprocket 7 c...
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The invention discloses a chain saw with a saw chain tension device. The chain saw comprises a shell, a chain wheel arranged in the shell and used for driving a saw chain, a chain plate for guiding the movement of the saw chain, a protective hood covering the chain wheel and partial chain plate and a saw chain tension device, wherein the saw chain tension device comprises a force bearing piece connected with the chain plate, an active piece for driving the force bearing piece so as to drive the chain plate to move longitudinally, a rotating device for driving the active piece and a transmission mechanism arranged between the rotating device and the active piece; the protective hood is provided with a first meshing part; the rotating device is provided with an abutting part; the transmission mechanism is provided with an anti-looseness device, and the anti-looseness device comprises an acting part selectively meshed with the abutting part and a second meshing part selectively matched and locked with the first meshing part; and the transmission mechanism further comprises a friction clutch device, the friction clutch device comprises mutually sheathed first friction piece and second friction piece, and a radial friction force is generated between the first friction piece and the second friction piece. The saw chain tension device can enable the saw chain to be tensioned and the chain plate to be compressed at the same time, and the looseness of the chain plate after tensioning can be effectively prevented. The saw chain tension device has the advantages of labor-saving performance in operation and good structure stability.
Description
technical field [0001] The invention relates to a chain saw, in particular to a chain saw with a saw chain tensioning device. Background technique [0002] European Patent Application Publication No. EP2036688A2 discloses a saw chain structure in which a single hand wheel is used to tension the saw chain and press the guide plate, but the other hand wheel needs to be rotated in reverse when the saw chain is replaced. The chainsaw comprises a sprocket rotatably supported in a housing for a saw chain guided on a chain plate, a tensioning assembly for tensioning the chain saw, the tensioning assembly comprising a chain plate A shaft wheel mechanism that moves longitudinally. The shaft wheel mechanism is provided with a wall with ribs on the surface to facilitate the reverse rotation operation when replacing the saw chain. groove, so that when the shaft-wheel mechanism is rotated, the spiral groove pushes the protrusion to move and drives the chain plate to move longitudinally ...
Claims
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IPC IPC(8): B23D57/02
Inventor 邓伟杨勇何明明
Owner POSITEC POWER TOOLS (SUZHOU) CO LTD