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Anti-dropping adjustment screw patent : CN201771922U

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Anti-dropping adjustment screw patent : CN201771922U

September 15, 2022
Latest company case about Anti-dropping adjustment screw patent : CN201771922U

Abstract

The utility model discloses an adjusting screw. The adjusting screw comprises a head provided with an external thread and a tail without an external thread. The outer diameter of the tail without an external thread is larger than the bottom diameter of the head provided with the external thread or outer diameter. The end surface of the tail is spherical or conical, and the end surface of the head is provided with an adjustment groove for adapting the adjustment tool. The adjustment groove is an inner hexagonal groove, a straight-shaped groove, a cross-shaped groove, a quadrangular groove, a triangular groove, a five-star-shaped groove or a quincunx-shaped groove. In the utility model, since the outer diameter of the tail without external thread is larger than the bottom diameter or the outer diameter of the head provided with external thread, a blocking ring is formed at the junction of the tail and the head, so that the nut matched with it is formed. It cannot fall off from the tail, which improves the safety and reliability of the adjusting screw during use.

adjusting screw

technical field

[0001] The utility model relates to a screw, in particular to an adjustment screw. Background technique

In mechanical equipment, adjusting screw is often used to adjust and locate the position of elastic part, for example, in small circuit breaker, the position of bimetal and elastic steel sheet is adjusted by adjusting screw. However, due to the limitation of the space of the use occasion, the length of the adjustment screw is generally short. During installation and use, due to vibration or improper adjustment, the tail of the adjustment screw is easy to fall off from the nut, resulting in adjustment and positioning failure. In addition, the falling off Leaving the adjusting screw in the circuit breaker also creates a safety hazard.

Utility model content

The technical problem to be solved by this utility model is to solve the problem that the adjustment screw is easy to fall off from the nut.

In order to solve the above-mentioned technical problem, the technical scheme adopted in the present utility model is to provide a kind of adjustment screw, and this adjustment screw comprises the head part that is provided with external thread and the tail part that is not provided with external thread, and the outer diameter of tail part is larger than head part bottom or outer diameter.

In above-mentioned scheme, the front end face of described tail is in spherical shape, conical shape or stepped shaft shape with small outside and inside big.

[0006] In the above-mentioned scheme, the tail end face of the head is provided with an adjustment groove for adapting the adjustment tool.

In such scheme, described adjustment groove is inner hexagonal groove, in-line groove, cruciform groove, quadrangular groove, triangular groove, five-star groove or quincunx groove.

The utility model, because the outer diameter of the tail that is not provided with external thread is greater than the bottom diameter or the outer diameter of the head that is provided with external thread, therefore at the junction of the tail that is not provided with external thread and the head that is provided with external thread A blocking ring is formed at the top, so that the matching nut cannot fall off from the tail, which improves the safety and reliability of the adjusting screw during use.

Description of drawings

Fig. 1 is the structural representation of the present utility model. Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in detail.

As shown in Figure 1, the adjusting screw 1 that the utility model provides comprises the head 12 that is provided with external thread and the tail 11 that is not provided with external thread, and the outer diameter of the tail 11 that is not provided with external thread is greater than that provided with external thread The bottom or outer diameter of the head 12. The end portion of the tail portion 11 is spherical, conical or stepped shaft shape with a small outside and a large inside, and the end surface of the head 12 is provided with an adjustment groove 14 for adapting the adjustment tool. Described adjustment groove 14 is a hexagonal groove, a straight groove, a cross groove, a quadrangular groove, a triangular groove, a five-star groove or a quincunx groove.

The utility model, because the outer diameter of the tail part 11 that is not provided with external thread is greater than the bottom diameter or the outer diameter of the head 12 that is provided with external thread, therefore in the tail part 11 that is not provided with external thread and the head that is provided with external thread The junction of the part 12 forms a blocking ring 13, so that the matching nut cannot fall off from the tail part 11, but can only be screwed in and out from the head in one direction, which solves the problem of the adjusting screw 1 falling off from the nut, even if It will not fall off when working on machines with high-speed vibration.

[0013] The specific application of the adjusting screw in the circuit breaker is described below.

After the utility model is combined with the nut, it is installed in the circuit breaker, wherein the nut is installed in the positioning slot corresponding to its shape and size and uses the nut as a positioning, and the adjustment screw is not provided with an external thread tail and the metal in the circuit breaker. The elastic sheet is tight and has elastic contact, and the metal elastic sheet is always applied to the end of the adjusting screw with a kind of elastic force. Therefore, under normal conditions, the adjusting screw will not move and fall out from the head with external threads, but can only move in the direction of the tail without external threads. The outer diameter of 11 is larger than that of the head 12 provided with external threads, so that a blocking ring 13 is formed at the junction of the tail 11 without external threads and the head 12 with external threads, preventing the nut from continuing to move and preventing The nut comes off the tail, which ensures the safe use of the circuit breaker.

Beneficial effect of the present utility model is:

(1), can make product meet different customer demands by the mode of changing thread specification and pitch specification, and the scope of application of product is more extensive;

(2), adjusting screw and nut combination can provide better adjustment and anti-dropping function, even if working on the machine of high-speed vibration, it will not fall off, ensuring the working stability of circuit breaker;

(3), because this adjusting screw shape only realizes by changing mould, therefore does not increase the manufacturing cost of product, has good development prospect.

The present utility model is not limited to above-mentioned best embodiment, anyone should know the structural change made under the enlightenment of the present utility model, all have identical or similar technical scheme with the present utility model, all fall into the present utility model within the scope of the new protection.

Claims (4)

Hide Dependent

The adjusting screw is characterized in that the adjusting screw comprises a tail part with an external thread on the head and without external thread, and the outer diameter of the tail part is larger than the bottom diameter or the outer diameter of the head part.

2. The adjusting screw according to claim 1, characterized in that the front end surface of the tail is in the shape of a spherical surface, a conical shape, or a stepped shaft shape with a small outside and a large inside.

3. The adjusting screw according to claim 1 or 2, characterized in that an adjusting groove for fitting an adjusting tool is provided on the rear end face of the head.

4. The adjusting screw according to claim 3, wherein the adjusting groove is an inner hexagonal groove, a straight-line groove, a cross-shaped groove, a quadrangular groove, a triangular groove, a five-star groove or a quincunx-shaped groove groove.

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