Chain hitting device

Abstract

The invention discloses a chain hitting device which is composed of a screw seat, a screw rod, a fork seat and a limiting block, wherein the screw seat is provided with a through screw hole for assembling the screw rod; the fork seat is opposite to the screw seat; a containing groove for placing of a chain is formed between the screw seat and the fork seat; the fork seat is provided with a tip quitting part matched with the screw hole; the limiting block is fixedly arranged above the containing groove and is closely connected with the position of the fork seat, so as to form a limiting region among the limiting block, the containing groove and the fork seat; and a notch for inserting the chain into the containing groove is formed between the limiting block and the screw seat, so as to push the chain in the containing groove to the limiting region to be positioned, and be good for carrying out chain hitting or chain assembling work on the screw rod. Compared with the existing chain hitting device, the chain hitting device disclosed by the invention has the advantages of being stable in structure, difficult in damage, and more stable and convenient in operation.

Description

technical field [0001] The invention relates to a chain cutter, in particular to a chain cutter capable of removing or installing a bicycle chain. Background technique [0002] see figure 1 , figure 2 and image 3 , the bicycle chain 10 is composed of a plurality of chain links connected in series, and each chain link is composed of two symmetrical ∞-shaped outer plates 11A, 11B, two symmetrical ∞-shaped inner plates 12A, 12B, a bushing 13 and a pin 14; the two inner plates 12A, 12B are butted on the inner ends of the two outer plates 11A, 11B, and the bushing 13 is kept between the two inner plates, so that the pins 14 pass through the outer plates 11A, 11B together. , inner plates 12A, 12B and bushing 13, such as figure 1 and image 3 As shown, the width W1 and W2 specifications of the chain 10 defined by the two outer plates 11A and 11B are not invariable. Generally speaking, figure 1 The width W1 shown in the smaller size is applied to the transmission on the bicy...

AI Technical Summary

Problems solved by technology

[0009] 1. When the chain is removed or installed, the bracket 24 can be completely flat on the inner side of the corresponding inner plates 12A, 12B, but, affected by the bushing 13, the left half of the inner plates 12A, 12B The exposed area of ​​the upper part is relatively small, so that the left half of the bracket 24 can only partially abut against the inner sides of the corresponding inner plates 12A, 12B. As a result, the stresses on the left and right sides of the bracket 24 are not symmetrical. In addition, the root of the bracket 24 and the stress-bearing area where the bracket 24 contacts the inner plates 12A, 12B are not large, and the stress concentration is easy to occur. Under the unstable stress and the mutual influence of the poles, the bracket 24 is very easy to break , it cannot achieve the effect of durable

[0010] 2. When the chain is removed or installed, the chain cutter only relies on the bracket 24 to locate the chain 10, and its positioning is not good, and it will more or less have the tendency to come out of the concave arc groove 241 upwards, causing the user to It is impossible to make the screw rod 25 top stop 251 can be accurately driven out or driven into the plunger 14, and repeated adjustments are required. In this regard, it is difficult to say that it is satisfactory.

[0011] 3. Since the chain 10 has two widths W1 and W2, it is necessary to control the chain 10 to be positioned on the bracket 24 at an appropriate position when removing or installing the chain. For ordinary people, it is difficult to identify it.

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