CN118508663B - Three-phase asynchronous motor easy to wire - Google Patents

Abstract

The invention relates to the technical field of three-phase asynchronous motors, in particular to an easy-to-wire three-phase asynchronous motor, which comprises a motor body, a junction box, a junction terminal, a box cover and a binding post, wherein side wing plates are arranged on two sides of the junction terminal, a first guide rod which extends vertically is arranged below the side wing plates, the side wing plates are inserted into a first guide sleeve which is arranged in the junction box and is in the same straight line with the first guide rod through the first guide rod, a first spring is sleeved on the first guide rod and is elastically connected with the junction terminal and the junction box, the box cover comprises an outer sealing cover and an inner movable plate, at least one presser foot which extends vertically downwards is arranged below the inner movable plate, the junction terminal and the junction box in the technical scheme can be separated, the junction terminal can protrude out of an opening of the junction box through the elasticity of the first spring, and the presser foot presses down the upper side of the junction terminal to enable the junction terminal to enter the inside of the junction box when the box is arranged at the opening of the junction box.

Description

A three-phase asynchronous motor that is easy to wire

Technical Field

The invention relates to the technical field of three-phase asynchronous motors, and in particular to a three-phase asynchronous motor which is easy to connect.

Background Art

As a type of electric motor, the three-phase asynchronous motor has the advantages of simple structure, low price, reliable operation, etc. compared with other electric motors, and is used in general mechanical equipment. The existing three-phase asynchronous motor is composed of a motor body, a junction box, a terminal set inside the junction box, a threading hole and a cover plate. When using it, first remove the multiple screws of the fixed cover plate on the junction box with a screwdriver, then open the junction box, and multiple wires enter the inside of the junction box through the threading holes. Connect the multiple wires to the corresponding interface terminals, and then fix the connection with a screwdriver. Finally, cover the cover plate and tighten the screws. The operation is relatively cumbersome, and the terminal is located inside the junction box. The operating space is small, which is not conducive to complex wiring.

Summary of the invention

In view of the above problems, it is necessary to provide a three-phase asynchronous motor that is easy to connect to address the problems in the prior art.

In order to solve the problems of the prior art, the technical solution adopted by the present invention is:

A three-phase asynchronous motor that is easy to wire comprises a motor body and a junction box arranged on the motor body, wherein a junction terminal is arranged in the junction box, a plurality of junction posts are arranged on the upper side of the junction terminal, side wing plates are arranged on both sides of the junction terminal, a first vertically extending guide rod is arranged below the side wing plate, the side wing plate is inserted into a first guide sleeve arranged in the junction box and on the same straight line as the first guide rod through the first guide rod, a first spring is sleeved on the first guide rod, the first spring elastically connects the junction terminal and the junction box, and the elastic force of the first spring makes the junction terminal protrude from the opening position of the junction box; a box cover is arranged on the junction box, the box cover blocks the opening of the junction box, the box cover comprises an outer sealing cover and an inner movable plate arranged in the outer sealing cover, at least one presser foot extending vertically downward is arranged below the inner movable plate, when the box cover is installed at the opening of the junction box, the presser foot presses down the upper side of the junction terminal so that the junction terminal enters the inside of the junction box.

Preferably, a column head extending to the bottom of the terminal block is provided at the bottom of the terminal block, a power connection hole which is in the same straight line as the first guide rod is provided in the terminal box, a power connection sleeve is installed in the power connection hole, and when the column head is inserted into the power connection sleeve, the terminal block is electrically connected to the motor body.

Preferably, at least one horizontally extending side extension plate is provided on both sides of the terminal block, and a sleeve rod is provided on the side extension plate and extends horizontally toward the outer end of the terminal block in a direction perpendicular to the extension direction of the side extension plate; the terminal block is provided with a limiting slide groove with the same number as the sleeve rod, and a positioning slider is slidably installed in the limiting slide groove, and the positioning slider moves horizontally in the limiting slide groove along the axis direction of the sleeve rod. A socket is provided at one end of the positioning slider facing the side extension plate, and when the terminal block is attached to the bottom of the terminal block, the socket and the sleeve rod are in the same straight line, and the positioning slider slides in the limiting slide groove until the sleeve rod is inserted into the socket to position the terminal.

Preferably, the outer sealing cover of the box lid is internally provided with downward pressing blocks of the same number as the positioning sliders, the downward pressing blocks extend vertically downward and pass through the avoidance holes provided on the inner movable plate, and the downward pressing blocks are located above the limiting slide groove; an inclined slope is provided on the upper side of the end of the positioning slider away from the insertion hole, and when the bottom of the downward pressing block is in contact with the upper slope of the positioning slider and moves downward, it pushes the positioning slider to move toward the side of the sleeve rod.

Preferably, a plurality of second guide rods extending vertically downward are arranged below the outer sealing cover, the second guide rods pass through second guide holes arranged on the inner movable plate, and the second guide rods are inserted into first guide holes arranged at the end corners of the junction box; the outer sealing cover and the inner movable plate are connected by a plurality of telescopic rods, and a third spring is sleeved on the outside of the telescopic rods, the third spring elastically connects the outer sealing cover and the inner movable plate, and the elastic force applied by the third spring to the inner movable plate causes the inner movable plate to move downward; the elastic force applied by the third spring to the inner movable plate is greater than the elastic force applied by the first spring to the wiring terminal.

Preferably, a plurality of mounting plates are provided at the center of the inner wall of the junction box, a second spring is provided on one side of the mounting plate, the second spring elastically connects the mounting plate and the positioning slider, and the elastic force of the second spring causes the positioning slider to move to a side away from the sleeve rod.

Preferably, an inner mounting hole is provided at the bottom end of the lower pressing block, the opening of the inner mounting hole faces the inner wall of the junction box, an elastic member and a positioning plug are provided in the inner mounting hole, the elastic member elastically connects the positioning plug and the inner wall of the inner mounting hole, the elastic force of the elastic member causes the positioning plug to protrude from the outer wall of the lower pressing block, and an inclined slope is provided at the bottom of one end of the positioning plug protruding from the outer wall of the inner mounting hole; a positioning hole that horizontally passes through the junction box is provided on the inner wall of the junction box, the longitudinal section of the positioning hole is the same in shape and size as the longitudinal section of the positioning plug, and when the outer sealing cover is attached to the upper opening of the junction box, the positioning plug is inserted into the positioning hole under the elastic force of the elastic member.

Preferably, an unlocker is provided on the side of the motor body where the positioning holes are provided in the junction box, and the unlocker includes a moving block, and a plug-in block with the same number as the positioning holes and on the same horizontal line is provided on the side of the moving block facing the junction box, and at least two third guide rods extending horizontally along the length direction of the plug-in block are provided on the side of the moving block away from the plug-in block, and the moving block is inserted into the guide seat through the third guide rod, and the guide seat is provided on the motor body; a limiting head is provided at one end of the third guide rod away from the moving block, and the diameter of the limiting head is larger than the diameter of the third guide rod, and a fourth spring is sleeved on the third guide rod, and the fourth spring elastically connects the guide seat and the limiting head, and the elastic force of the fourth spring causes the moving block to move to the side away from the junction box.

Preferably, a plurality of first waist-shaped holes are provided on one side of the junction box, the first waist-shaped holes are opened upward, and a second waist-shaped hole having the same number as the first waist-shaped holes is provided at the bottom of the outer sealing cover, the second waist-shaped holes are opened downward, and the diameters of the second waist-shaped holes and the first waist-shaped holes are the same.

Compared with the prior art, the present invention has the following beneficial effects:

Firstly, the wiring terminals in the wiring box of the present invention are separable from the wiring box, and the wiring terminals can be moved upward by the elastic force of the first spring sleeved on the first guide rod, so that the upper surface of the wiring terminals protrudes from the opening of the wiring box, thereby leaving the narrow space in the wiring box, making it convenient for the staff to perform wiring operations.

Secondly, the wiring terminal in the present invention is inserted into the first guide sleeve of the wiring box through the first guide rod to limit the wiring terminal in the horizontal direction, so that the wiring terminal will not vibrate in the horizontal direction, and the sleeve rod on the side of the wiring terminal is in the same straight line as the socket on the positioning slider in the wiring box. When the box cover is installed on the wiring box, the positioning slider can be moved by the lower pressure block until the sleeve rod is inserted into the socket to limit the wiring terminal, thereby preventing the wiring terminal from vibrating in the longitudinal direction, thereby protecting the wiring on the wiring terminal.

Thirdly, a positioning block is provided in the lower pressing block in the present invention, and the positioning block is also moved down to be aligned with the positioning hole provided on the junction box and inserted into the positioning hole. The outer sealing cover is inserted into the positioning hole through the upward elastic force of the third spring and the positioning block is cooperated with to keep the outer sealing cover at the opening of the junction box. No bolt connection is required, and the operation is simple and quick.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a three-phase asynchronous motor that is easy to connect and is in a connected state;

FIG. 2 is a three-phase asynchronous motor that is easy to connect. FIG.

FIG3 is a second exploded view of the three-phase asynchronous motor which is easy to connect;

FIG4 is a side view of a three-phase asynchronous motor that is easy to connect in a connection state;

Fig. 5 is a partial enlarged view of the cross-sectional view taken at point A-A in Fig. 4;

FIG6 is a partial enlarged view of point B in FIG5 ;

FIG7 is a perspective view of a three-phase asynchronous motor that is easy to connect and is not connected;

FIG8 is a partial enlarged view of point C in FIG7;

FIG9 is a side view of a three-phase asynchronous motor that is easy to connect in an unconnected state;

Fig. 10 is a cross-sectional view of the section taken along line D-D of Fig. 9;

FIG. 11 is a partial enlarged view of point E in FIG. 10 .

The numbers in the figure are: 1, junction box; 11, first guide sleeve; 12, power connection hole; 121, power connection sleeve; 13, limit slide; 14, positioning slide block; 141, jack; 15, first guide hole; 16, mounting plate; 161, second spring; 17, positioning hole; 18, first waist hole; 2, terminal; 21, terminal post; 211, column head; 22, side wing plate; 221, first guide rod; 222, first spring; 23, side extension plate; 231, sleeve rod; 3, box Cover; 31, outer sealing cover; 311, second guide rod; 312, telescopic rod; 313, third spring; 314, second waist-shaped hole; 32, inner movable plate; 321, presser foot; 322, avoidance hole; 323, second guide hole; 33, lower pressure block; 331, inner mounting hole; 332, elastic member; 333, positioning plug block; 4, unlocker; 41, moving block; 411, plug block; 412, third guide rod; 413, limit head; 414, fourth spring; 42, guide seat.

DETAILED DESCRIPTION

In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

Refer to Figures 1 to 11:

A three-phase asynchronous motor that is easy to wire comprises a motor body and a terminal box 1 arranged on the motor body, wherein a terminal 2 is arranged in the terminal box 1, a plurality of terminal posts 21 are arranged on the upper side of the terminal 2, side wing plates 22 are arranged on both sides of the terminal 2, a vertically extending first guide rod 221 is arranged below the side wing plate 22, the side wing plate 22 is inserted into a first guide sleeve 11 arranged in the terminal box 1 and on the same straight line as the first guide rod 221 through the first guide rod 221, and a first spring 22 is sleeved on the first guide rod 221. 2, the first spring 222 elastically connects the wiring terminal 2 and the junction box 1, and the elastic force of the first spring 222 makes the wiring terminal 2 protrude from the opening position of the junction box 1; a box cover 3 is provided on the junction box 1, and the box cover 3 blocks the opening of the junction box 1, and the box cover 3 includes an outer sealing cover 31 and an inner movable plate 32 arranged in the outer sealing cover 31, and at least one presser foot 321 extending vertically downward is provided below the inner movable plate 32, and when the box cover 3 is installed at the opening of the junction box 1, the presser foot 321 presses down the upper side of the wiring terminal 2 so that the wiring terminal 2 enters the interior of the junction box 1.

The three-phase asynchronous motor in the present application is provided with a terminal block 2 in the junction box 1. The staff can install the wiring by connecting the connecting wire to the terminal post 21 on the terminal block 2. The terminal block 2 in this embodiment is inserted into the first guide sleeve 11 provided in the junction box 1 through the first guide rod 221 on the side wing plate 22. The terminal block 2 can move up and down in the junction box 1. When the opening of the junction box 1 is not installed with the box cover 3, the terminal block 2 can move upward by the elastic force of the first spring 222 sleeved on the first guide rod 221, so that the upper surface of the terminal block 2 protrudes from the opening of the junction box 1, thereby leaving the narrow space in the junction box 1, which is convenient for the staff to perform wiring operations. When the box cover 3 is installed at the opening of the junction box 1, the presser foot 321 provided on the inner movable plate 32 in the outer sealing cover 31 can press the upper surface of the terminal block 2, so that the terminal block 2 can compress the first spring 222 to enter the interior of the junction box 1, and the outer sealing cover 31 blocks the opening of the junction box 1 to protect the terminal block 2 inside the junction box 1. The side wing plates 22 are located on both sides of the wiring terminal 2 to ensure the operating area on the upper side of the wiring terminal 2 and avoid affecting the wiring of the staff.

In order to ensure that the terminal block 2 can move in the vertical direction and the wires connected to the terminal block 2 will not be frequently bent during movement and thus break, the following features are specifically set:

A column head 211 extending to the bottom of the terminal block 2 is provided at the bottom of the terminal block 2. A power connection hole 12 which is in the same straight line as the first guide rod 221 is provided in the terminal box 1. A power connection sleeve 121 is installed in the power connection hole 12. When the column head 211 is inserted into the power connection sleeve 121, the terminal block 2 is electrically connected to the motor body.

In this embodiment, the connection line between the motor body and the terminal block 2 is built into the power connection hole 12 at the bottom of the terminal box 1, and a power connection sleeve 121 is provided in the power connection hole 12. The coaxially connected column head 211 of the terminal block 2 is located at the bottom of the terminal block 2. When the terminal block 2 is pressed into the inside of the terminal block 1 by the presser foot 321 of the box cover 3, the column head 211 is inserted into the power connection sleeve 121 at the bottom of the terminal block 1, thereby realizing the connection of the wires between the terminal block 2 and the motor body. When the terminal block 2 protrudes from the opening of the terminal block 1 for wiring, the column head 211 of the terminal block 2 is separated from the power connection sleeve 121 of the terminal block 1, and the terminal block 2 is in an open circuit state, reducing the risk of electric shock to the user during wiring. The terminal block 2 is inserted into the first guide sleeve 11 through the first guide rod 221 to guide the movement of the terminal block 2, ensuring that when the terminal block 2 moves downward, the column head 211 can be accurately inserted into the power connection sleeve 121.

In order to prevent the terminal block 2 from shaking inside the terminal box 1 when the motor body is working, the following features are specifically provided:

At least one horizontally extending side extension plate 23 is provided on both sides of the terminal block 2, and a sleeve rod 231 is provided on the side extension plate 23 and extends horizontally toward the outer end of the terminal block 2 in a direction perpendicular to the extension direction of the side extension plate 23; the terminal block 1 is provided with the same number of limiting slide grooves 13 as the sleeve rod 231, and a positioning slider 14 is slidably installed in the limiting slide groove 13, and the positioning slider 14 moves horizontally in the limiting slide groove 13 along the axial direction of the sleeve rod 231. The positioning slider 14 is provided with a socket 141 (as shown in Figure 6) at one end of the positioning slider 14 facing the side extension plate 23. When the terminal block 2 is attached to the bottom of the terminal block 1, the socket 141 and the sleeve rod 231 are on the same straight line, and the positioning slider 14 slides in the limiting slide groove 13 until the sleeve rod 231 is inserted into the socket 141 to position the terminal block 2.

In this embodiment, the wiring terminal 2 is inserted into the first guide sleeve 11 of the junction box 1 through the first guide rod 221 to limit the wiring terminal 2 in the horizontal direction, so that the wiring terminal 2 will not vibrate in the horizontal direction. In order to prevent the wiring terminal 2 from vibrating in the vertical direction, a horizontal sleeve rod 231 is also provided on the side of the wiring terminal 2. When the wiring terminal 2 is pressed to the bottom position of the junction box 1 by the presser foot 321 of the box cover 3, the column head 211 is inserted into the power connection sleeve 121, and the sleeve rod 231 on the side of the wiring terminal 2 is in the same straight line as the socket 141 on the positioning slider 14 in the junction box 1. The positioning slider 14 moves along the limiting slide groove 13 until the sleeve rod 231 is inserted into the socket 141 to limit the wiring terminal 2, prevent the wiring terminal 2 from vibrating in the longitudinal direction, and then protect the wiring on the wiring terminal 2.

In order to achieve the purpose of automatically sleeve the positioning slide block 14 on the sleeve rod 231 after the box cover 3 seals the opening of the junction box 1, the following features are specifically provided:

The outer sealing cover 31 of the box cover 3 is internally provided with a number of lower pressing blocks 33 which is the same as the number of the positioning sliders 14. The lower pressing blocks 33 extend vertically downward and pass through the avoidance holes 322 provided on the inner movable plate 32. The lower pressing blocks 33 are located above the limiting slide groove 13. An inclined slope is provided on the upper side of the end of the positioning slider 14 away from the insertion hole 141. When the bottom of the lower pressing block 33 is in contact with the upper slope of the positioning slider 14 and moves downward, it pushes the positioning slider 14 to move toward the side of the sleeve rod 231.

In the present embodiment, a vertical pressing block 33 is arranged below the outer sealing cover 31. When the box cover 3 is installed at the opening of the junction box 1, the pressing block 33 presses the inclined surface above the positioning slide block 14. During the process that the outer sealing cover 31 is buckled on the upper side of the junction box 1 and moves downward, the pressing block 33 can push the positioning slide block 14 to move toward the sleeve rod 231 until the sleeve rod 231 is inserted into the insertion hole 141 of the positioning slide block 14. After the box cover 3 is installed, the movable terminal 2 in the junction box 1 can be automatically limited without any additional operation, thereby ensuring the stability of the terminal 2.

In order to realize the steps of first pressing the terminal block 2 to fit the bottom of the junction box 1 and then moving the positioning slider 14 to be sleeved on the sleeve rod 231 when installing the box cover 3, the following features are specifically provided:

A plurality of second guide rods 311 extending vertically downward are arranged below the outer sealing cover 31, and the second guide rods 311 pass through second guide holes 323 arranged on the inner movable plate 32, and the second guide rods 311 are inserted into first guide holes 15 arranged at the end corners of the junction box 1; the outer sealing cover 31 and the inner movable plate 32 are connected by a plurality of telescopic rods 312, and a third spring 313 is sleeved on the outer side of the telescopic rod 312, and the third spring 313 elastically connects the outer sealing cover 31 and the inner movable plate 32, and the elastic force applied by the third spring 313 to the inner movable plate 32 causes the inner movable plate 32 to move downward; the elastic force applied by the third spring 313 to the inner movable plate 32 is greater than the elastic force applied by the first spring 222 to the terminal 2.

In this embodiment, the box cover 3 moves downward from the opening of the junction box 1, and the second guide rod 311 under the outer sealing cover 31 is inserted into the first guide hole 15 of the junction box 1 to guide the movement of the outer sealing cover 31, so as to ensure that the outer sealing cover 31 can be sleeved at the opening position of the junction box 1, and the inner movable plate 32 in the outer sealing cover 31 is slidably connected with the outer sealing cover 31 through the telescopic rod 312, and the third spring 313 on the telescopic rod 312 applies a downward elastic force to the inner movable plate 32. Therefore, when the box cover 3 is installed on the junction box 1, the pressure foot 321 under the inner movable plate 32 first contacts the wiring terminal 2 protruding from the opening of the junction box 1, Because the elastic force of the third spring 313 is greater than the elastic force of the first spring 222, the terminal 2 moves preferentially under the push of the pressure foot 321 until it fits into the bottom of the terminal box 1, and the column head 211 is inserted into the power connection sleeve 121. At this time, the inner movable plate 32 cannot move. Then the staff continues to move the outer sealing cover 31 to compress the third spring 313 of the outer sealing cover 31, and the outer sealing cover 31 continues to move downward relative to the inner movable plate 32. During this process, the pressing block 33 at the bottom of the outer sealing cover 31 contacts the positioning slider 14 of the terminal box 1, pushing the positioning slider 14 to move toward the sleeve rod 231, thereby ensuring the limiting effect of the terminal 2.

In order to solve the problem of how to ensure that the box cover 3 is removed, the positioning slider 14 can automatically detach from the sleeve rod 231 to ensure that the terminal block 2 can be moved upward, the following features are specifically set:

A plurality of mounting plates 16 are arranged at the center of the inner wall of the junction box 1 , and a second spring 161 is arranged on one side of the mounting plate 16 , which elastically connects the mounting plate 16 and the positioning slider 14 , and the elastic force of the second spring 161 causes the positioning slider 14 to move to the side away from the sleeve rod 231 .

In this embodiment, when the staff removes the box cover 3, the outer sealing cover 31 moves up relative to the inner movable plate 32, and the inner movable plate 32 remains in place under the elastic force of the third spring 313. At this time, the lower pressing block 33 is separated from the surface of the positioning slider 14, and the positioning slider 14 moves to the side away from the sleeve rod 231 under the elastic force of the second spring 161 set in the junction box 1, thereby releasing the longitudinal limitation of the terminal 2. When the inner movable plate 32 is separated from the opening of the junction box 1, the terminal 2 can move up under the elastic force of the first spring 222. The existence of the second spring 161 can ensure that the terminal 2 can maintain the function of moving up each time the box cover 3 is removed.

In order to solve the problem of how to fix the box cover 3 at the opening of the junction box 1, the following features are specifically provided:

An inner mounting hole 331 is provided at the bottom end of the lower pressing block 33, and the opening of the inner mounting hole 331 faces the inner wall of the junction box 1. An elastic member 332 and a positioning plug 333 are provided in the inner mounting hole 331. The elastic member 332 elastically connects the positioning plug 333 and the inner wall of the inner mounting hole 331. The elastic force of the elastic member 332 makes the positioning plug 333 protrude from the outer wall of the lower pressing block 33. An inclined slope is provided at the bottom of one end of the positioning plug 333 protruding from the outer wall of the lower pressing block 33; a positioning hole 17 is provided on the inner wall of the junction box 1, and the longitudinal section of the positioning hole 17 is the same in shape and size as the longitudinal section of the positioning plug 333. When the outer sealing cover 31 is attached to the upper opening of the junction box 1, the positioning plug 333 is inserted into the positioning hole 17 under the elastic force of the elastic member 332.

In the present embodiment, an inner mounting hole 331 is provided in the lower pressing block 33 of the outer sealing cover 31. The positioning plug 333 in the inner mounting hole 331 protrudes from the surface of the inner mounting hole 331 under the elastic force of the elastic member 332. When the box cover 3 is installed on the junction box 1, the inclined surface at the bottom of the positioning plug 333 fits the opening of the junction box 1, the positioning plug 333 compresses the elastic member 332 to enter the inner mounting hole 331, and the top of the positioning plug 333 fits the inner wall of the junction box 1 and moves. The elastic member 332 can be a metal elastic sheet with a certain elastic force. Or spring, as the lower pressing block 33 moves downward, the positioning slider 14 is pushed to be sleeved on the side extension plate 23, and the positioning plug block 333 also moves downward to a position aligned with the opening of the positioning hole 17 set on the junction box 1 located inside the junction box 1. At this time, the positioning plug block 333 is inserted into the positioning hole 17 under the elastic force of the elastic member 332, and the outer sealing cover 31 is inserted into the positioning hole 17 through the upward elastic force of the third spring 313 and the positioning plug block 333 is inserted into the positioning hole 17 to keep the outer sealing cover 31 at the opening of the junction box 1. No bolt connection is required, and the operation is simple and quick.

In order to solve the problem of how to release the locking of the box cover 3 by the positioning plug 333 to facilitate the removal of the box cover 3, the following features are specifically set:

An unlocker 4 is provided on the side of the motor body where the positioning holes 17 are provided in the terminal box 1. The unlocker 4 includes a moving block 41. The moving block 41 is provided with plug blocks 411 on the same horizontal line as the positioning holes 17 on the side facing the terminal box 1. At least two third guide rods 412 extending horizontally along the length direction of the plug blocks 411 are provided on the side of the moving block 41 away from the plug blocks 411. The moving block 41 is inserted into the guide seat 42 through the third guide rods 412. The guide seat 42 is provided on the motor body; a limiting head 413 is provided at one end of the third guide rod 412 away from the moving block 41. The diameter of the limiting head 413 is larger than the diameter of the third guide rod 412. A fourth spring 414 is sleeved on the third guide rod 412. The fourth spring 414 elastically connects the guide seat 42 and the limiting head 413. The elastic force of the fourth spring 414 causes the moving block 41 to move to the side away from the terminal box 1.

In this embodiment, an unlocker 4 is provided to release the locked state of the box cover 3. The moving block 41 of the unlocker 4 is slidably installed on a side of the positioning hole 17 provided on the outside of the junction box 1. The plug block 411 on the moving block 41 is aligned with the positioning hole 17. The moving block 41 is inserted in the guide seat 42 through the third guide rod 412 to ensure that the plug block 411 can enter the positioning hole 17 in a straight line. In a normal state, the moving block 41 is away from the junction box 1 under the elastic force of the fourth spring 414 sleeved on the third guide rod 412. When the box cover 3 needs to be unlocked, the staff moves the moving block 41 so that the moving block 41 compresses the fourth spring 414, and the plug block 411 enters the positioning hole 17 from the external socket of the positioning hole 17, and pushes the positioning plug block 333 in the positioning hole 17 back into the inner mounting hole 331. The outer sealing cover 31 can move up under the elastic force of the third spring 313 and detach from the opening of the junction box 1. The operation is simple and quick.

In order to facilitate the connection of the terminal 21 to the external power supply, the following features are specifically provided:

A plurality of first waist-shaped holes 18 are arranged on one side of the junction box 1, and the first waist-shaped holes 18 are opened upward. The bottom of the outer sealing cover 31 is provided with the same number of second waist-shaped holes 314 as the first waist-shaped holes 18, and the second waist-shaped holes 314 are opened downward, and the diameters of the second waist-shaped holes 314 and the first waist-shaped holes 18 are the same.

The junction box 1 in this embodiment is provided with a first waist-shaped hole 18, which is convenient for placing the wiring connected to the terminal post 21. When the box cover 3 is installed on the junction box 1, the second waist-shaped hole 314 is aligned with the first waist-shaped hole 18, and the inner walls of the second waist-shaped hole 314 and the first waist-shaped hole 18 contact the outer wall of the wiring to fix the wiring. At the same time, the wiring will not be squeezed, thereby ensuring the service life of the wiring and facilitating connection with an external power supply.

Working principle: The terminal block 1 is provided with a terminal block 2. The staff can connect the connecting wire to the terminal block 21 on the terminal block 2 to install the wiring. When the opening of the terminal block 1 is not installed with the box cover 3, the terminal block 2 can be moved upward by the elastic force of the first spring 222 sleeved on the first guide rod 221, so that the upper surface of the terminal block 2 protrudes from the opening of the terminal block 1, which is convenient for the staff to perform wiring operations. When the box cover 3 is installed at the opening of the terminal block 1, the presser foot 321 provided on the inner movable plate 32 in the outer sealing cover 31 can press the upper surface of the terminal block 2. The wiring terminal 2 can compress the first spring 222 and enter the wiring box 1. The sleeve rod 231 on the side of the wiring terminal 2 is in the same straight line as the socket 141 on the positioning slide block 14 in the wiring box 1. The lower pressing block 33 on the outer sealing cover 31 presses the positioning slide block 14 during the downward movement, so that the positioning slide block 14 moves along the limiting slide groove 13 until the sleeve rod 231 is inserted into the socket 141, so as to limit the wiring terminal 2. The positioning plug 333 of the lower pressing block 33 is simultaneously inserted into the positioning hole 17 of the wiring box 1 to lock the position of the box cover 3, and the staff can remove the box cover 3 using the unlocker 4.

The above embodiments only express one or several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims (5)

1. The utility model provides an easily wiring three-phase asynchronous motor, including the motor body, and terminal box (1) of setting on the motor body, be provided with binding post (2) in terminal box (1), a serial communication port, terminal (2) upside is provided with a plurality of terminal (21), terminal (2) both sides are provided with flank board (22), flank board (22) below is provided with vertical first guide bar (221) that extends, flank board (22) pass through first guide bar (221) cartridge in first uide bushing (11) that are in same straight line with first guide bar (221) that set up in terminal box (1), first spring (222) cover is equipped with on first guide bar (221), first spring (222) elastic connection terminal (2) and terminal box (1), the elasticity of first spring (222) makes terminal (2) outstanding terminal box (1) open position;

The junction box (1) is provided with a box cover (3), the box cover (3) is used for plugging an opening of the junction box (1), the box cover (3) comprises an outer sealing cover (31) and an inner movable plate (32) arranged in the outer sealing cover (31), at least one vertically downward extending presser foot (321) is arranged below the inner movable plate (32), and when the box cover (3) is arranged at the opening of the junction box (1), the upper side of a lower press-connection terminal (2) of the presser foot (321) enables the junction terminal (2) to enter the junction box (1);

The bottom of the binding post (21) is provided with a column head (211) extending to the bottom of the binding post (2), a power connection hole (12) which is in the same straight line with the first guide rod (221) is arranged in the binding box (1), a power connection sleeve (121) is arranged in the power connection hole (12), and the binding post (2) is electrically connected with the motor body when the column head (211) is inserted into the power connection sleeve (121);

at least one horizontally extending side extension plate (23) is arranged on two sides of the wiring terminal (2), and a loop bar (231) which extends horizontally to the outer end of the wiring terminal (2) perpendicular to the extending direction of the side extension plate (23) is arranged on the side extension plate (23);

The terminal box (1) is internally provided with limit sliding grooves (13) with the same number as the loop bars (231), the limit sliding grooves (13) are internally provided with positioning sliding blocks (14) in a sliding manner, the positioning sliding blocks (14) horizontally move in the limit sliding grooves (13) along the axial direction of the loop bars (231), one end of each positioning sliding block (14) facing the corresponding side extension plate (23) is provided with a jack (141), when the terminal box (2) is attached to the bottom of the terminal box (1), the jacks (141) and the loop bars (231) are in the same straight line, and the positioning sliding blocks (14) slide in the limit sliding grooves (13) until the loop bars (231) are inserted into the jacks (141) to position the terminal pins (2);

The inside of an external sealing cover (31) of the box cover (3) is provided with lower pressing blocks (33) with the same number as the positioning sliding blocks (14), the lower pressing blocks (33) vertically extend downwards and penetrate through avoidance holes (322) arranged on the inner movable plate (32), and the lower pressing blocks (33) are positioned above the limiting sliding grooves (13);

the upper side of one end of the positioning slide block (14) far away from the jack (141) is provided with an inclined slope, and when the bottom of the lower pressing block (33) is attached to the upper side slope of the positioning slide block (14) to move downwards, the positioning slide block (14) is pushed to move towards one side of the sleeve rod (231);

A plurality of second guide rods (311) extending vertically downwards are arranged below the outer sealing cover (31), the second guide rods (311) penetrate through second guide holes (323) formed in the inner movable plate (32), and the second guide rods (311) are inserted into first guide holes (15) formed in the end corners of the junction box (1);

The outer sealing cover (31) is connected with the inner movable plate (32) through a plurality of telescopic rods (312), a third spring (313) is sleeved outside the telescopic rods (312), the third spring (313) is elastically connected with the outer sealing cover (31) and the inner movable plate (32), and the elastic force exerted by the third spring (313) on the inner movable plate (32) enables the inner movable plate (32) to move downwards;

The third spring (313) applies a larger elastic force to the inner movable plate (32) than the first spring (222) applies to the terminal (2).

2. The three-phase asynchronous motor easy to wire according to claim 1, wherein a plurality of mounting plates (16) are arranged in the center of the inner wall of the junction box (1), a second spring (161) is arranged on one side of each mounting plate (16), the second spring (161) is elastically connected with the mounting plates (16) and the positioning sliding blocks (14), and the positioning sliding blocks (14) are moved to the side far away from the loop bars (231) by the elastic force of the second spring (161).

3. The three-phase asynchronous motor easy to wire according to claim 2, wherein an inner mounting hole (331) is formed in the bottom end of the lower pressing block (33), an opening of the inner mounting hole (331) faces the inner wall of the junction box (1), an elastic piece (332) and a positioning insert block (333) are arranged in the inner mounting hole (331), the elastic piece (332) is elastically connected with the positioning insert block (333) and the inner wall of the inner mounting hole (331), the elastic piece (332) enables the positioning insert block (333) to protrude out of the outer wall of the lower pressing block (33), and an inclined surface is formed in the bottom of one end of the positioning insert block (333) protruding out of the outer wall of the inner mounting hole (331);

The connecting box is characterized in that a positioning hole (17) horizontally penetrating through the connecting box (1) is formed in the inner wall of the connecting box (1), the longitudinal section of the positioning hole (17) is identical to the longitudinal section of the positioning insert block (333), and when the external sealing cover (31) is attached to the upper opening of the connecting box (1), the positioning insert block (333) is inserted into the positioning hole (17) under the elastic action of the elastic piece (332).

4. A three-phase asynchronous motor easy to wire according to claim 3, characterized in that the motor body is provided with an unlocking device (4) at the side of the junction box (1) provided with the positioning holes (17), the unlocking device (4) comprises moving blocks (41), the side of the moving blocks (41) facing the junction box (1) is provided with inserting blocks (411) which are the same in number and on the same horizontal line as the positioning holes (17), the side of the moving blocks (41) far away from the inserting blocks (411) is provided with at least two third guide rods (412) horizontally extending along the length direction of the inserting blocks (411), the moving blocks (41) are inserted on guide seats (42) through the third guide rods (412), and the guide seats (42) are arranged on the motor body;

One end of the third guide rod (412) far away from the movable block (41) is provided with a limiting head (413), the diameter of the limiting head (413) is larger than that of the third guide rod (412), a fourth spring (414) is sleeved on the third guide rod (412), the fourth spring (414) is elastically connected with the guide seat (42) and the limiting head (413), and the elastic force of the fourth spring (414) enables the movable block (41) to move towards one side far away from the junction box (1).

5. The three-phase asynchronous motor easy to wire according to claim 1, wherein a plurality of first waist-shaped holes (18) are formed in one side of the junction box (1), openings of the first waist-shaped holes (18) are arranged upwards, second waist-shaped holes (314) with the same number as the first waist-shaped holes (18) are formed in the bottom of the outer sealing cover (31), the openings of the second waist-shaped holes (314) are arranged downwards, and the diameters of the second waist-shaped holes (314) and the diameters of the first waist-shaped holes (18) are the same.