Coupling for screw machine

Abstract

The utility model relates to the technical field of screw machines, in particular to a coupling for a screw machine, which comprises a first shaft, a second shaft, a first magnet and a second magnet. The first magnet and the second magnet are connected through magnetic force so that the first magnet and the second magnet can be disconnected when torsion between the first shaft and the second shaft is too large, and the outer side face of the first magnet is matched with the inner side wall of the non-circular groove so that the first magnet can rotate relative to the first shaft in the non-circular groove. The outer side face of the second shaft and the outer side face of the second magnet are circular so that the second shaft and / or the second magnet can rotate in the non-circular groove. According to the screw machine, the first magnet and the second magnet are disconnected when the torsion of the screw machine is too large so as to protect the screw machine and a screw, and the pressure of the screw machine is kept within an acceptable range when the screw machine is used by arranging the spring, so that the screw can be prevented from being slipped.

Description

TECHNICAL FIELD

[0001] The utility model relates to screw machine technical field especially relates to a shaft coupling for screw machine. BACKGROUND

[0002] On the production line, often have screw slip silk, its reason is that electric wrench torque is big when cannot automatically disconnect, or electric wrench head pressure size is not suitable, and lead to screw slip silk. Screw slip silk after difficult to take out, increase difficulty for maintenance etc. INVENTION CONTENTS

[0003] The utility model solves the technical problem, provide a kind of shaft coupling for screw machine, solve the problem of screw machine torque control and avoid screw slip silk in prior art.

[0004] The utility model solves the technical problem and adopts the scheme: a kind of shaft coupling for screw machine, including first shaft, second shaft, first magnet, second magnet, wherein the middle of first shaft is provided with non-circular groove, second shaft, first magnet, second magnet are placed in non-circular groove, second shaft is connected with second magnet, first magnet and second magnet are connected by magnetic force to disconnect first magnet and second magnet when the excessive torque between first shaft and second shaft, the outer side of first magnet is matched with the inner side wall of non-circular groove to prevent first magnet from rotating in non-circular groove relative to first shaft, the outer side of second shaft and the outer side of second magnet are both circular to enable second shaft and / or second magnet can rotate in non-circular groove.

[0005] In the above structure, non-circular groove is regular hexagon slot, its cross section is regular hexagon, and the cross section of first magnet is regular hexagon.

[0006] In the above structure, second magnet is circular, and its diameter is equal to the distance between two parallel sides in regular hexagon.

[0007] In the above structure, the diameter of the outer side of second shaft is equal to the diameter of the outer side of second magnet.

[0008] In the above structure, first shaft is connected with electric wrench head, second shaft is connected with motor for locking screw, and lubricating oil is added in the non-circular groove of first shaft to reduce the friction between second shaft and / or second magnet and non-circular groove.

[0009] In the above structure, spring is further included, spring is placed in non-circular groove, first shaft is connected with first magnet through spring, and spring is placed between first shaft and first magnet.

[0010] The technical effect of the utility model discloses: through setting up first magnet, second magnet, make screw machine when the torsion is too big first magnet and second magnet disconnect, to protect screw machine and screw, through setting up spring, make screw machine when using pressure keep in acceptable range, like this can avoid screw slip silk.

[0011] The above description is only a summary of the technical scheme of the utility model, in order to more clearly understand the technical means of the utility model, can be implemented according to the content of the specification, and in order to let the above and other purposes, characteristics and advantages of the utility model can be more obvious and easy to understand, the following preferred embodiments are held, and the detailed description is as follows in cooperation with the drawings. DRAWINGS

[0012] Figure 1 It is the perspective view of the utility model;

[0013] Figure 2 It is the exploded view of the utility model;

[0014] Figure 3 It is the internal structure diagram of the utility model.

[0015] In the drawing: 1, first shaft;2, second shaft;3, first magnet;4, second magnet;5, spring. DETAILED DESCRIPTION

[0016] In order to make the content of the utility model can be more easily clearly understood, the following according to specific embodiment and combining with the drawings, the utility model is further explained.

[0017] It should be noted that the terms "center", "upper", "lower", "front", "rear", "left", "right", "inner", "outer" and the like used herein indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model. Unless otherwise stated, the meaning of "multiple" is two or more.

[0018] Unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected;It can be mechanical connection, or electrical connection;It can be directly connected, or indirectly connected through intermediate medium, it can be the communication inside two elements.For those skilled in the art, the specific meaning of the above terms in the utility model can be understood through specific circumstances.

[0019] With reference to the drawings, a kind of for screw machine coupling, including first shaft 1, second shaft 2, first magnet 3, second magnet 4, spring 5, wherein the middle of first shaft 1 is provided with non-circular slot, second shaft 2, first magnet 3, second magnet 4, spring 5 are placed in non-circular slot, first shaft 1 with first magnet 3 is connected by spring 5, second shaft 2 is connected with second magnet 4, spring 5 is placed between first shaft 1, first magnet 3, first magnet 3 with second magnet 4 is connected by magnetic force to disconnect first magnet 3 with second magnet 4 when excessive torsion between first shaft 1, second shaft 2, the outer side of first magnet 3 with the inner side wall of non-circular slot match to prevent first magnet 3 can rotate in non-circular slot relative to first shaft 1, the outer side of second shaft 2, the outer side of second magnet 4 are circular to enable second shaft 2 and / or second magnet 4 can rotate in non-circular slot.

[0020] Further, non-circular slot is regular hexagonal slot, and the cross section of the regular hexagonal slot is regular hexagonal, and the cross section of the first magnet 3 is regular hexagonal.

[0021] Further, the second magnet 4 is circular, and the diameter of the second magnet 4 is equal to the distance between two parallel sides of the regular hexagonal.

[0022] Further, the diameter of the outer side of the second shaft 2 is equal to the diameter of the outer side of the second magnet 4.

[0023] Further, the first shaft 1 is connected with the electric screwdriver head, the second shaft 2 is connected with the motor for locking screws, and lubricating oil is added in the non-circular slot of the first shaft 1 to reduce the friction between the second shaft 2 and / or the second magnet 4 and the non-circular slot.

[0024] The utility model discloses a first magnet 3, second magnet 4 are set to make screw machine disconnect first magnet 3 with second magnet 4 when excessive torsion, to protect screw machine and screw, by setting spring 5, make screw machine when using pressure keep in acceptable range, once torsion is greater than the elasticity of spring 5, spring 5 will automatically compress, make electric screwdriver head jump out screw recess, like this can avoid screw to be slipped silk.

[0025] The above-described embodiments are only preferred embodiments of the utility model, and cannot be used to limit the protection scope of the utility model, and any non-substantial changes and modifications made by the person skilled in the art on the basis of the utility model are all within the protection scope of the utility model.

Claims

1. A coupling for a screw machine, characterized by: The application relates to a device for locking a screwdriver, comprising a first shaft, a second shaft, a first magnet and a second magnet, wherein a non-circular slot is arranged in the middle of the first shaft, the second shaft, the first magnet and the second magnet are placed in the non-circular slot, the second shaft is connected with the second magnet, the first magnet is connected with the second magnet through magnetic force so that the first magnet and the second magnet are disconnected when the torsion between the first shaft and the second shaft is too large, the outer side of the first magnet matches the inner side wall of the non-circular slot so that the first magnet cannot rotate in the non-circular slot relative to the first shaft, the outer side of the second shaft and the outer side of the second magnet are circular so that the second shaft and / or the second magnet can rotate in the non-circular slot.

2. The coupling of claim 1 wherein: The non-circular slot is a regular hexagonal slot, the cross section of the non-circular slot is a regular hexagon, and the cross section of the first magnet is a regular hexagon.

3. The coupling of claim 2 wherein: The second magnet is circular, and the diameter of the second magnet is equal to the distance between two parallel sides of the regular hexagon.

4. The coupling of claim 1 wherein: The diameter of the outer side of the second shaft is equal to the diameter of the outer side of the second magnet.

5. The coupling of claim 1 wherein: The first shaft is connected with an electric screwdriver head, the second shaft is connected with an electric motor for locking a screw, and lubricating oil is added in the non-circular slot of the first shaft so as to reduce the friction between the second shaft and / or the second magnet and the non-circular slot.

6. The coupling of claim 1 wherein: The device further comprises a spring, the spring is placed in the non-circular slot, the first shaft is connected with the first magnet through the spring, and the spring is placed between the first shaft and the first magnet.

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