CN105448551A - Telescopic change-over switch operating handle and application thereof - Google Patents

Abstract

The invention relates to a telescopic change-over switch operating handle and application thereof. The handle provided by the invention comprises a sleeve, wherein one end of the sleeve is closed, the other end of the sleeve is opened, an insulating bush wraps the sleeve, the opened end of the sleeve is exposed out of the insulating bush, and a telescopic rod is arranged in the sleeve and completely or partially extends out of the sleeve in a telescopic way. Another technical scheme of the invention is to provide the application of the above telescopic change-over switch operating handle. With the handle provided by the invention, the handle is arranged in a change-over switch on the condition that the manual operation of the change-over switch is ensured to be achieved, the installation space is saved, impact resistance and vibration resistance are achieved, the handle is convenient to use, and the appearance of the change-over switch is simpler and more attractive.

Description

A retractable transfer switch operating handle and its application

technical field

The invention relates to a telescopic operating handle of a transfer switch (hereinafter referred to as the handle), which is built into a transfer switch housing and belongs to the technical field of electric engineering.

Background technique

In the power system, two or more power supplies are used for important electrical equipment and loads to ensure the continuity of power supply. A transfer switch is a switching device that can be used for two or more power sources or load conversions. In electrical equipment, it is mostly used to switch on and off circuits infrequently, to connect power sources and loads, etc.

When using a transfer switch to realize power supply or load switching, there are usually two modes of electric operation and manual operation. The circuit (power supply or load) can be connected, broken and converted manually or electrically. When the circuit needs to be switched manually, the operating mechanism of the transfer switch needs to be operated through the manual operation handle, so as to realize the conversion of the circuit.

Nowadays, many transfer switch handles that are common are hung on the transfer switch housing. If the transfer switch is installed in a complete set of power distribution cabinets, such a handle placement method will occupy more installation positions, resulting in waste of space.

Special-purpose transfer switches usually encounter working environments such as swings, shocks, and vibrations. The external handle has the hidden danger of jumping off or slipping in the complete set of power distribution cabinets, which not only affects the operation, but also easily causes Damage to the power distribution cabinet and its internal components may even cause serious consequences.

Contents of the invention

The object of the present invention is to provide a handle that occupies a small space and is resistant to shock and vibration.

In order to achieve the above object, the technical solution of the present invention is to provide a telescopic transfer switch operating handle, which is characterized in that it includes a sleeve with one end closed and the other end open, an insulating sleeve is wrapped outside the sleeve, and the sleeve is open The end of the sleeve is exposed outside the insulating sleeve, and a telescopic rod is arranged in the sleeve, and the telescopic rod is either completely shrunk in the sleeve or partially protruded from the sleeve.

Preferably, the sleeve is a hollow structure, a circle of steps is formed on the inner wall of the sleeve close to the opening, a circle of flanges is formed at the end of the telescopic rod, and the telescopic rod extends outward toward the sleeve After being out in place, the flange on the telescopic rod is against the step on the inner wall of the sleeve.

Preferably, the middle section of the telescopic rod has an external thread I, and the side wall of the step is provided with an internal thread I matching the external thread I.

Preferably, both the external thread one and the internal thread one adopt coarse thread.

Preferably, one end of the sleeve is closed by a screw cap.

Preferably, a word slot is provided on the nut.

Preferably, a slot 2 is provided on the closed end surface of the insulating sleeve.

Another technical solution of the present invention is to provide an application of the above-mentioned retractable transfer switch operating handle, which is characterized in that the above-mentioned transfer switch operating handle is installed in the base of the transfer switch, on the cover of the base There is a hole that can accommodate the passage of the transfer switch operating handle, and an insert fixed on the base is provided below the hole. After the transfer switch operating handle is inserted from the hole, it is fastened by the insert, and the transfer switch operates When the handle is fastened in place, it is partially exposed from the cover.

Preferably, a second external thread is provided on the end of the sleeve exposed outside the insulating sleeve, and a second internal thread matching the second external thread is provided in the insert.

The handle provided by the invention is placed inside the transfer switch under the condition that the transfer switch can be manually operated, saving installation space, resisting shock and vibration, convenient to use, and making the transfer switch more concise and beautiful in appearance.

Description of drawings

Fig. 1A is a schematic diagram of the extended state of the handle provided by the present invention;

Fig. 1B is a schematic diagram of the retracted state of the handle provided by the present invention;

Fig. 2 is a schematic diagram of the telescopic rod;

Figure 3 is a schematic diagram of the sleeve;

Figure 4A is a schematic diagram of the installation state when the handle is taken out of the base;

Fig. 4B is a schematic diagram of the installation state when the handle is inserted into the base.

detailed description

In order to make the present invention more comprehensible, preferred embodiments are described in detail below with accompanying drawings.

Referring to FIG. 1A and FIG. 1B , a telescopic operating handle provided by the present invention includes a nut 1 , an insulating sleeve 2 , a sleeve 3 , and a telescopic rod 4 .

As shown in Figure 2, there is an external thread on the middle section of the telescopic rod 4, which can be matched with the internal thread on the right end of the sleeve 3 as shown in Figure 3, and the outer diameter of the left end of the telescopic rod 4 is greater than the inner diameter of the right end of the sleeve 3. When the screw thread is tightened, the telescopic rod 4 can be prevented from moving out of the sleeve 3 when stretching out. After tightening, the relative position of the telescopic rod 4 and the sleeve 3 is fixed, and radial movement will not occur.

In order to make the handle firm and reliable during manual operation, the thread between the telescopic rod 4 and the sleeve 3 uses a coarse thread, and must have a certain thread length to withstand the axial force and torque received when the manual operation switch.

As shown in Figure 3, the left end of the sleeve 3 has an internal thread, which is used to cooperate with the external thread on the nut 1. After the nut 1 is installed on the sleeve 3, the axial movement of the telescopic rod 4 can be restricted, preventing The telescoping rod 4 moves out of the sleeve 3 when retracted. There is a "one" groove on the nut 1, which can be tightened with a screwdriver during installation, so as to facilitate the application of force during disassembly. The wall thickness of the sleeve 3 should be appropriate, both to be able to withstand the force and moment transmitted by the telescopic rod 4, and to ensure that the outer diameter of the handle should not be too large.

The external thread at the right end of the sleeve 3 is used to cooperate with the insert 6 in the base 7, the handle can be installed in the base 7 of the transfer switch, and the handle can be completely fixed on the base 7 to prevent possible swing, shock and vibration.

The outside of the sleeve 3 presses the insulating sleeve 2 to play the role of insulation protection and convenient grip. The insulating cover 2 also has a "one" word groove, which can be tightened or unscrewed with a screwdriver when the handle is installed too tightly or too loosely. The surface of the insulating sleeve 2 is made into a grid or a frosted shape, so as to increase friction and facilitate the application of force during operation.

The installation position of the handle provided by the present invention is shown in FIG. 4A and FIG. 4B , and is mainly composed of the following parts: a cover 5 , an insert 6 , and a base 7 . A hole is made on the cover 5 for inserting the handle, and the insert 6 fixed in the base 7 is used for fastening the handle. After the handle is tightened and installed in the base 7, the handle has a certain length to stretch out from the cover 5, so that the handle can be twisted out by hand when it is convenient to take.

When manual operation is required, rotate the handle to loosen the thread between the insert 6 and the sleeve 3, and then the handle can be taken out; then extend the telescopic rod 4 from the sleeve 3, and rotate the telescopic rod 4 to make the telescopic rod 4 The thread between the sleeve 3 and the sleeve 3 is fastened, so that the telescopic rod 4 remains in the extended state and is no longer retracted; at this time, it can be inserted into the handle connection hole of the changeover switch for manual operation.

After the manual operation is finished, unscrew the threaded connection between the telescopic rod 4 and the sleeve 3, insert the handle from the hole on the cover 5 into the insert 6 in the base 7, at this time the telescopic rod 4 is pushed back to the sleeve by the insert 6 3 inside; the thread on the outside of the sleeve 3 cooperates with the thread on the insert 6, and the telescopic operating handle is fixed in the base 7 after tightening.

To sum up, the present invention aims at the handle of the transfer switch and its use, utilizes the limited space, designs and invents a space-saving, convenient to use, simple in structure, and can prevent shock and vibration. The utilization rate and safety performance have been greatly improved.

Claims (9)

1. A retractable transfer switch operating handle, characterized in that it comprises a sleeve (3) that is closed at one end and open at the other end, and is wrapped with an insulating sleeve (2) outside the sleeve (3), and the sleeve (3) The end of the opening is exposed outside the insulating sleeve (2), and a telescopic rod (4) is provided in the sleeve (3), and the telescopic rod (4) is either fully shrunk in the sleeve (3) or partially protruded from the sleeve ( 3) Outside. 2. A telescopic transfer switch operating handle according to claim 1, characterized in that, the sleeve (3) is a hollow structure, and a hole is formed on the inner wall of the sleeve (3) close to the opening. A ring of steps is formed at the end of the telescopic rod (4). After the telescopic rod (4) stretches out to the outside of the sleeve (3) and is in place, the flange on the telescopic rod (4) It is against the step on the inner wall of the sleeve (3). 3. A kind of retractable transfer switch operating handle as claimed in claim 2, characterized in that, the middle section of the telescopic rod (4) has an external thread 1, and the side wall of the step is provided with a An external thread and a mating internal thread. 4 . The telescopic transfer switch operating handle according to claim 3 , wherein both the external thread one and the internal thread one adopt coarse thread. 5. A retractable transfer switch operating handle according to claim 1, characterized in that one end of the sleeve (3) is closed by a nut (1). 6. A retractable transfer switch operating handle as claimed in claim 5, characterized in that a slot 1 is provided on the nut (1). 7. A retractable transfer switch operating handle according to claim 1, characterized in that, a slot 2 is provided on the closed end surface of the insulating sleeve (2). 8. An application of the telescopic transfer switch operating handle as claimed in claim 1, characterized in that the transfer switch operating handle as claimed in claim 1 is installed in the base (7) of the transfer switch, The cover (5) of the base (7) has a hole that can accommodate the passage of the operating handle of the transfer switch, and an insert (6) fixed on the base (7) is provided below the hole, and the transfer switch After the operating handle is inserted into the hole, it is fastened by the insert (6). After the operating handle of the transfer switch is fastened in place, part of it is exposed outside the cover (5). 9. The application of the changeover switch operating handle as claimed in claim 8, characterized in that, the end of the sleeve (3) exposed outside the insulating sleeve (2) is provided with two external threads, and Part (6) is provided with an internal thread two matched with the external thread two.