CN113613428B

CN113613428B - Soft starter of magnetic control type motor

Info

Publication number: CN113613428B
Application number: CN202110863575.6A
Authority: CN
Inventors: 刘国庆; 任景旭
Original assignee: Jiangsu Jinchi Electric Co ltd
Current assignee: Jiangsu Jinchi Electric Co ltd
Priority date: 2021-07-29
Filing date: 2021-07-29
Publication date: 2023-06-30
Anticipated expiration: 2041-07-29
Also published as: CN113613428A

Abstract

The invention discloses a soft starter of a magnetic control motor, which comprises a soft starter and a control panel, wherein the control panel is arranged at the front end of the soft starter, outer support rods are in clearance fit with the outer sides of the upper end and the lower end of the inside of the soft starter, outer tooth bars are processed on the inner sides of the outer walls of the left and the right outer support rods, pressing blocks are fixedly connected at the tail ends of the outer walls of the outer support rods, a sliding assembly is arranged in the center of the inside of the rear side of the soft starter, and the control assembly is arranged at the front side of the control panel. This magnetically controlled motor's soft starter, through the cooperation between soft starter, recess, diaphragm, handle, briquetting and the gyro wheel, when needing to carry out soft starter's position adjustment, make the inside removal of gyro wheel when the briquetting outwards remove, can realize the synchronous linkage of briquetting and gyro wheel through the linkage of gear department, avoided the installation of current soft starter and the problem that does not have the linkage to lead to carrying out the position adjustment when needs control respectively between the sliding structure.

Description

Soft starter of magnetic control type motor

Technical Field

The invention relates to the technical field of motors, in particular to a soft starter of a magnetic control motor.

Background

The Soft Starter is a novel motor control device integrating the functions of Soft start, soft stop, light load energy saving and various protection of a collector, is called a Soft Starter abroad, is most known as a domestic Soft Starter and a parallel hps2 series Soft Starter, mainly comprises a three-phase anti-parallel thyristor and an electronic control circuit thereof, which are connected in series between a power supply and a controlled motor, and is a novel motor control device integrating the functions of Soft start, soft stop, light load energy saving and various protection of the collector, although the prior art can realize the use of the Soft Starter.

However, in the prior art, there is a problem that the installation of the soft starter and the sliding structure are not linked to cause separate control when the position adjustment is performed in the use process, the problem that the installation and the disassembly processes of the soft starter are complicated and inconvenient for performing the position adjustment, the problem that the position adjustment is easy to cause abrasion through sliding friction, and the problem that the clamping is unstable or the position deviation occurs in the moving process of the soft starter.

Disclosure of Invention

The invention aims to provide a soft starter of a magnetic control motor, which solves the problem that the installation and sliding structure of the soft starter proposed in the background art are not linked to cause separate control when position adjustment is carried out.

In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a soft starter of magnetic control motor, includes soft starter and control panel, control panel is installed to the front end of soft starter, the equal clearance fit in both ends outside has outer branch about the inside of soft starter the outer wall inboard of outer branch is all processed there is the external tooth strip, the outer wall end of outer branch all fixedly connected with briquetting, the inboard inner wall of briquetting all fixedly connected with rubber pad the outer wall outside of outer rack all meshes to link to each other has the gear, the inboard all fixedly connected with of inner wall of gear has the pivot, the outer wall both sides of pivot all rotate with soft starter through the bearing and link to each other, the inside center of rear side of soft starter is provided with sliding component, auxiliary component is installed to the upper and lower both sides of soft starter, control component is installed to control panel's front side.

Preferably, the sliding component comprises an inner supporting rod, a transverse plate, a rubber sleeve, a bracket, a spring, a pin shaft, a roller, an inner rack and a handle;

the inside inboard of rear side clearance fit at soft starter of a plurality of interior branch, the outer wall outside of interior branch all processes has the internal tooth strip, interior rack meshes with the gear mutually, upper and lower the inboard end of interior branch all fixedly connected with diaphragm, both sides all fixedly connected with support about the inboard of diaphragm, the inside of support all rotates with the gyro wheel through the round pin axle and links to each other, the outer wall rear end of diaphragm all fixedly connected with handle, the rubber sleeve has been cup jointed to the outer wall of handle, upper and lower the outside center of diaphragm all is provided with the spring, the both sides of spring are fixed continuous with soft starter and diaphragm respectively.

Preferably, the left and right inner struts and the outer struts are distributed on two sides of the spring in mirror symmetry, and the transmission ratio between the inner tooth bars and the outer tooth bars is consistent with that between the gears.

Preferably, the auxiliary assembly includes a heat radiating plate, a main wiring hole, a mounting hole, a fan, and a frame;

the utility model discloses a soft starter, including soft starter, frame, fan, main wiring hole, mounting hole, fan, main wiring hole, a plurality of the upper end rear side at soft starter is installed to the heating panel, a plurality of the frame is installed in the lower extreme rear portion left and right sides at soft starter, the four corners inside of frame has all been processed the mounting hole, the frame links to each other with soft starter is fixed, the internally mounted of frame has the fan, a plurality of the even equidistance processing of main wiring hole is inside soft starter's upper and lower both ends front side.

Preferably, the control assembly comprises a secondary wiring hole, a sanding strip, a display screen, an adjusting button and a control button;

the utility model discloses a control panel, including control panel, display screen, control panel, a plurality of secondary wiring holes even equidistance processing is inside the upper and lower both ends of control panel, the display screen is installed in control panel's front end top, the below center of display screen is provided with a plurality of adjustment buttons, the outer wall outside four corners of adjustment button all is provided with control button, adjustment button and control button all process in control panel's front end lower part, a plurality of dull polish strip all rigid coupling is in control panel's front end both sides.

Preferably, the rear side of the soft starter is internally provided with a cross beam, the cross beam is fixedly connected with the inner wall of an external electrical cabinet, grooves are formed in the inner walls of the upper end and the lower end of the cross beam, and the upper side and the lower side of the inner center of the cross beam are of an internal hollow structure.

Preferably, the inclined planes inclined inwards are formed in the upper side and the lower side of the outer wall of the cross beam, the inclined planes consistent with the inclined angle of the outer wall of the cross beam are formed in the inner wall of the rubber pad, the inclination of the inner wall of the groove is consistent with the inclination of the tail end of the outer wall of the roller, and the contact part of the inner wall of the groove and the outer wall of the roller is perfectly fit.

Compared with the prior art, the invention has the beneficial effects that: the soft starter of the magnetic control motor comprises:

through the cooperation between soft starter, the recess, the diaphragm, the handle, briquetting and the gyro wheel, when needing to carry out the position adjustment of soft starter, the user only need inwards draw the handle, make the diaphragm inwards move, the diaphragm drives the gyro wheel and presses the inner wall at the recess, simultaneously can drive the briquetting through interior rack, external tooth bar and gear and remove, make the gyro wheel inwards remove the briquetting outwards, the synchronous linkage of briquetting and gyro wheel can be realized through the linkage of gear department, the problem that does not have the linkage to lead to when carrying out the position adjustment between the installation of current soft starter and the sliding construction needs to be controlled respectively is avoided;

after the position of the soft starter is adjusted through the cooperation among the soft starter, the spring, the handle, the gear, the cross beam and the pressing block, a user can directly loosen the handle, so that the cross plate is pulled by the elasticity of the spring to outwards move and reset, the cross plate drives the inner support rod to outwards move, the inner support rod drives the outer support rod to inwards move through the gear, the pressing block is restored to be tightly pressed on the upper side and the lower side of the cross beam, the position of the soft starter is fixed, and the problem that the traditional soft starter is complicated in mounting and dismounting processes and inconvenient to adjust the position is solved;

through the cooperation between briquetting, gyro wheel, recess, soft starter and crossbeam, when soft starter carries out the position variation, the briquetting outwards removes and removes closely laminating state, and the gyro wheel presses in the inside of recess, and then the user is when moving soft starter and remove, and the gyro wheel carries out the position adjustment through the pivoted mode, intersects in the current position adjustment that carries out soft starter through the mode of spout slider, has avoided carrying out the position adjustment through sliding friction and has caused the problem of wearing and tearing easily;

through the cooperation between crossbeam, briquetting, gyro wheel, recess and the diaphragm, because the shape design of crossbeam has the inclined plane of inwards slope in its outer wall upper and lower both sides processing, consequently the briquetting is at the inside in-process of moving, and its inner wall can be perfect with the outer wall inclined plane laminating of crossbeam, realizes the purpose of compressing tightly, simultaneously at the laminating in-process between gyro wheel and the recess, also because its processing has the inclined plane of the same angle, can move to central point fast when the gyro wheel is inwards moved, has avoided carrying out the unstable or position deviation's of centre gripping problem of moving the in-process of soft starter appearance.

Drawings

FIG. 1 is a rear cross-sectional schematic view of the present invention;

FIG. 2 is an enlarged schematic view of the structure shown at A in FIG. 1;

FIG. 3 is a schematic view of the front side structure of the present invention;

FIG. 4 is a schematic view of the bottom view of the present invention;

FIG. 5 is a schematic rear cross-sectional view of the present invention;

fig. 6 is a schematic diagram of a front view structure of the present invention.

In the figure: 1. soft starter 2, sliding component 201, inner strut, 202, diaphragm, 203, rubber sleeve, 204, support, 205, spring, 206, pin, 207, roller, 208, inner toothed bar, 209, handle, 3, auxiliary component, 301, heat dissipating plate, 302, main wiring hole, 303, mounting hole, 304, fan, 305, frame, 4, control component, 401, secondary wiring hole, 402, frosted bar, 403, display screen, 404, adjustment button, 405, control button, 5, outer toothed bar, 6, briquetting, 7, outer strut, 8, rubber pad, 9, beam, 10, groove, 11, control panel, 12, spindle, 13, gear.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1-6, the present invention provides a technical solution: the utility model provides a soft starter of magnetic control motor, including soft starter 1 and control panel 11, control panel 11 is installed to the front end of soft starter 1, the inside upper and lower both ends outside of soft starter 1 all clearance fit has outer branch 7, outer branch 7 can move in the inside of soft starter 1, outer rack 5 has all been processed to the outer wall inboard of left and right outer branch 7, outer rack 5 of outer wall end rigid coupling of outer branch 7 has briquetting 6 can drive gear 13 to rotate, the inboard inner wall of briquetting 6 all rigid coupling has rubber pad 8, the outer wall outside of outer rack 5 all meshes to link to have gear 13, the inboard of gear 13 all rigid coupling has pivot 12, soft starter 1 accessible pivot 12 rotates the support to gear 13, the outer wall both sides of pivot 12 all rotate with soft starter 1 through the bearing and link, the inside center in rear side of soft starter 1 is provided with sliding element 2, auxiliary element 3 is installed to the upper and lower both sides of soft starter 1, control element 4 is installed to the front side of control panel 11;

through the cooperation between soft starter 1, recess 10, diaphragm 202, handle 209, briquetting 6 and the gyro wheel 207, when needing to carry out the position adjustment of soft starter 1, the user only needs inwards to draw handle 209, make diaphragm 202 inwards move, diaphragm 202 drives gyro wheel 207 and presses the inner wall at recess 10, can drive briquetting 6 through interior rack 208, external tooth bar 5 and gear 13 simultaneously and remove, briquetting 6 outwards removes when making gyro wheel 207 inwards move, the synchronous linkage of briquetting 6 and gyro wheel 207 can be realized through the linkage of gear 13 department, the problem that needs the separate control when having avoided there is not the linkage to lead to carrying out position adjustment between the installation of current soft starter and the sliding structure is avoided.

The sliding assembly 2 comprises an inner supporting rod 201, a transverse plate 202, a rubber sleeve 203, a support 204, a spring 205, a pin shaft 206, a roller 207, an inner toothed bar 208 and a handle 209, wherein the inner supporting rods 201 are in clearance fit with the inner side of the rear side of the soft starter 1, the inner supporting rod 201 can move in the soft starter 1, the inner toothed bar 208 is processed on the outer side of the outer wall of the inner supporting rod 201, the inner toothed bar 208 is meshed with the gear 13, the gear 13 can drive the inner supporting rod 201 to move through the inner toothed bar 208, the transverse plate 202 is fixedly connected with the tail ends of the inner sides of the upper and lower inner supporting rods 201, the support 204 is fixedly connected with the left and right parts of the inner side of the transverse plate 202, the inner side of the support 204 is fixedly connected with the roller 207 through the pin shaft 206, the transverse plate 202 can drive the roller 207 to move through the support 204, the rear end of the outer wall of the transverse plate 202 is fixedly connected with the handle 209, the outer wall of the handle 209 is sleeved with the rubber sleeve 203, the outer side of the upper and lower transverse plates 202 is provided with the spring 205, the elastic coefficient K of 1800N/m, the two sides of the spring 205 are fixedly connected with the soft starter 1 and the transverse supporting rod 202 respectively, the left and right inner supporting rod 201 and the inner toothed bar 7 are symmetrically distributed between the inner toothed bars and the inner toothed bar 208 and the gear 13 in a mirror image ratio of the same with the gear 13;

after the position of the soft starter 1 is adjusted through the cooperation among the soft starter 1, the spring 205, the handle 209, the gear 13, the cross beam 9 and the pressing block 6, a user can directly loosen the handle 209, the cross plate 202 is pulled to move outwards and reset by the elastic force of the spring 205, the cross plate 202 drives the inner supporting rod 201 to move outwards, the inner supporting rod 201 drives the outer supporting rod 7 to move inwards through the gear 13, the pressing block 6 is restored to be tightly pressed on the upper side and the lower side of the cross beam 9, the position of the soft starter 1 is fixed, and the problem that the installation and the disassembly processes of the traditional soft starter 1 are complicated and inconvenient for position adjustment is avoided.

The auxiliary assembly 3 comprises a heat radiation plate 301, main wiring holes 302, mounting holes 303, fans 304 and frames 305, wherein the heat radiation plate 301 is arranged at the rear side of the upper end of the soft starter 1, a plurality of frames 305 are arranged at the left side and the right side of the rear part of the lower end of the soft starter 1, the mounting holes 303 are formed in the four corners of the frames 305, the frames 305 are fixedly connected with the soft starter 1, the frames 305 can support the fans 304, the fans 304 are arranged in the frames 305, and the main wiring holes 302 are uniformly and equidistantly formed in the front sides of the upper end and the lower end of the soft starter 1;

through the cooperation between briquetting 6, gyro wheel 207, recess 10, soft starter 1 and crossbeam 9, when soft starter 1 carries out the position variation, briquetting 6 outwards removes and removes closely laminating state, and gyro wheel 207 presses in the inside of recess 10, and then the user is moving soft starter 1 when moving, and gyro wheel 207 carries out the position adjustment through the pivoted mode, intersects in the current position adjustment that carries out soft starter 1 through the mode of spout slider, has avoided carrying out the position adjustment through sliding friction and has caused the problem of wearing and tearing easily.

The control assembly 4 comprises secondary wiring holes 401, grinding bars 402, a display screen 403, adjusting buttons 404 and control buttons 405, wherein the plurality of secondary wiring holes 401 are uniformly and equidistantly processed inside the upper end and the lower end of the control panel 11, the display screen 403 is installed above the front end of the control panel 11, the display screen 403 can show a specific starting state, the center below the display screen 403 is provided with the plurality of adjusting buttons 404, the four corners outside the outer wall of the adjusting buttons 404 are respectively provided with the control buttons 405, the adjusting buttons 404 and the control buttons 405 are respectively processed at the lower part of the front end of the control panel 11, the plurality of grinding bars 402 are respectively fixedly connected at the two sides of the front end of the control panel 11, the grinding bars 402 can avoid sliding at the control panel 11, a cross beam 9 is fixedly connected with the inner wall of an external electrical cabinet, grooves 10 are respectively processed on the inner walls of the upper end and the lower end of the cross beam 9, the inner center of the cross beam 9 is of an internal hollow structure, the upper side and the lower side of the outer wall of the cross beam 9 are respectively processed with inclined surfaces which incline inwards, the inner walls of the rubber pad 8 are respectively processed with inclined surfaces which are consistent with the outer wall angles of the cross beam 9, and the inclined surfaces of the inner walls 207 are respectively, and the inclined surfaces of the inner walls of the cross beam 9 are respectively contact with the inner walls 207 of the roller wheels, and the roller wheels 207 are perfectly matched with the inclined surfaces of the inner walls, and the inner walls of the inner walls, which are respectively;

through the cooperation between crossbeam 9, briquetting 6, gyro wheel 207, recess 10 and diaphragm 202, because the shape design of crossbeam 9 is processed in its outer wall upper and lower both sides has the inclined plane of inwards slope, consequently briquetting 6 in the inside removal in-process, its inner wall can be perfect with the outer wall inclined plane laminating of crossbeam 9, realize the purpose of compressing tightly, simultaneously in the laminating in-process between gyro wheel 207 and recess 10, also because its processing has the inclined plane of the same angle, but the quick travel is to central point when gyro wheel 207 moves inwards, the problem of unstable or the deviation of position of centre gripping appears in the removal in-process that carries out soft starter has been avoided.

When the soft starter of the magnetic control motor is needed to be used, firstly, a user can install the cross beam 9 in the inner wall of the corresponding electrical cabinet, then slide the device in one side of the cross beam 9, in the normal use process, the elastic force of the spring 205 can pull the upper cross beam 202 and the lower cross beam 202 to move outwards, the cross beam 202 can drive the pressing block 6 to press the outer wall of the cross beam 9 through the transmission among the inner supporting rod 201, the outer supporting rod 7 and the gear 13, the position installation of the integral structure is realized, when the position adjustment of the soft starter 1 is needed, the user only needs to pull the handle 209 inwards, the cross beam 202 moves inwards, the cross beam 202 drives the roller 207 to press the inner wall of the groove 10, meanwhile, the inner rack 208, the outer tooth bar 5 and the gear 13 can drive the pressing block 6 to move inwards, the pressing block 6 moves outwards simultaneously, the synchronous linkage of the pressing block 6 and the roller 207 can be realized through the gear 13, the problem that the prior soft starter needs to be controlled respectively when the installation and sliding structure of the soft starter are not linked is avoided, after the position of the soft starter 1 is adjusted, a user can directly loosen the handle 209, so that the transverse plate 202 is pulled to move outwards and reset by the elastic force of the spring 205, the transverse plate 202 drives the inner support rod 201 to move outwards, the inner support rod 201 drives the outer support rod 7 to move inwards through the gear 13, the restoring press block 6 is tightly pressed on the upper side and the lower side of the cross beam 9, the position fixing of the soft starter 1 is realized, the problem that the prior soft starter 1 is complicated and inconvenient to adjust the position is avoided, meanwhile, when the position of the soft starter 1 is adjusted, the press block 6 moves outwards to release the close fitting state, the roller 207 is pressed in the groove 10, and then when the user moves the soft starter 1, the roller 207 carries out position adjustment through the pivoted mode, intersect in the current mode that carries out soft starter 1 through the spout slider, avoided carrying out the position adjustment through sliding friction and caused the problem of wearing and tearing easily, simultaneously because the shape design of crossbeam 9 has the inclined plane of inwards slope in its outer wall upper and lower both sides processing, consequently briquetting 6 is at the in-process of moving, its inner wall can be perfect with the outer wall inclined plane laminating of crossbeam 9, realize the purpose of compressing tightly, simultaneously in the laminating process between roller 207 and recess 10, also because its processing has the inclined plane of the same angle, can move to central point fast when roller 207 moves inwards, avoided carrying out the unstable or position deviation's of centre gripping problem in the moving process of soft starter.

In the description of the present invention, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "another end," "upper," "one side," "top," "inner," "front," "center," "two ends," etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "configured," "connected," "secured," "screwed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other or in interaction with each other, unless explicitly defined otherwise, the meaning of the terms described above in this application will be understood by those of ordinary skill in the art in view of the specific circumstances.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a soft starter of magnetic control formula motor, includes soft starter (1) and control panel (11), control panel (11) are installed to the front end of soft starter (1), its characterized in that: the automatic soft starter is characterized in that outer struts (7) are respectively in clearance fit with the outer sides of the upper end and the lower end of the inside of the soft starter (1), outer tooth bars (5) are respectively machined on the inner sides of the outer walls of the outer struts (7), pressing blocks (6) are respectively fixedly connected to the tail ends of the outer walls of the outer struts (7), rubber pads (8) are respectively fixedly connected to the inner walls of the inner sides of the pressing blocks (6), gears (13) are respectively connected to the outer sides of the outer walls of the outer tooth bars (5) in a meshed mode, rotating shafts (12) are respectively fixedly connected to the inner sides of the inner walls of the gears (13), two sides of the outer walls of the rotating shafts (12) are respectively connected with the soft starter (1) in a rotating mode through bearings, sliding assemblies (2) are respectively arranged in the inner centers of the rear sides of the soft starter (1), and auxiliary assemblies (3) are respectively arranged on the upper side and the lower side of the soft starter (1), and control assemblies (4) are respectively arranged on the front sides of the control panel (11).

The sliding assembly (2) comprises an inner supporting rod (201), a transverse plate (202), a rubber sleeve (203), a bracket (204), a spring (205), a pin shaft (206), a roller (207), an inner toothed bar (208) and a handle (209);

the inner support rods (201) are in clearance fit with the inner side of the rear side of the soft starter (1), inner tooth strips (208) are machined on the outer side of the outer wall of the inner support rods (201), the inner tooth strips (208) are meshed with the gears (13), transverse plates (202) are fixedly connected to the tail ends of the inner sides of the inner support rods (201), supports (204) are fixedly connected to the left and right inner sides of the transverse plates (202), the inner sides of the supports (204) are rotationally connected with the rollers (207) through pin shafts (206), handles (209) are fixedly connected to the rear ends of the outer walls of the transverse plates (202), rubber sleeves (203) are sleeved on the outer walls of the handles (209), springs (205) are arranged in the centers of the outer sides of the upper and lower transverse plates (202), and two sides of each spring (205) are fixedly connected with the soft starter (1) and the transverse plates (202) respectively;

the control assembly (4) comprises a secondary wiring hole (401), a frosted bar (402), a display screen (403), an adjusting button (404) and a control button (405);

a plurality of even equidistance processing in control panel (11) upper and lower both ends are inside, display screen (403) are installed in control panel (11) front end top, the below center of display screen (403) is provided with a plurality of adjustment buttons (404), the outer wall outside four corners of adjustment button (404) all is provided with control button (405), adjustment button (404) and control button (405) all process in control panel (11) front end lower part, a plurality of dull polish strip (402) all rigid coupling are in control panel (11) front end both sides.

2. A magnetically controlled motor soft starter as claimed in claim 1, wherein: the left and right inner support rods (201) and the outer support rods (7) are distributed on two sides of the spring (205) in mirror symmetry, and the transmission ratio between the inner tooth bars (208) and the outer tooth bars (5) and the gear (13) is consistent.

3. A magnetically controlled motor soft starter as claimed in claim 1, wherein: the auxiliary assembly (3) comprises a heat radiating plate (301), a main wiring hole (302), a mounting hole (303), a fan (304) and a frame (305);

the utility model discloses a soft starter, including soft starter (1) and main wiring hole (302), heating panel (301) are installed in the upper end rear side of soft starter (1), a plurality of frame (305) are installed in the lower extreme rear portion left and right sides of soft starter (1), all process mounting hole (303) in four corners inside of frame (305), frame (305) are fixed continuous with soft starter (1), the internally mounted of frame (305) has fan (304), a plurality of main wiring hole (302) even equidistance processing is inside the upper and lower both ends front side of soft starter (1).

4. A magnetically controlled motor soft starter as claimed in claim 1, wherein: the inside crossbeam (9) that is provided with of rear side of soft starter (1), crossbeam (9) are fixed continuous with the inner wall of external electrical cabinet, and the upper and lower both ends inner wall of crossbeam (9) all processes fluted (10), both sides are inside hollow structure about the inside center of crossbeam (9).

5. The magnetically controlled motor soft starter of claim 4, wherein: the inclined planes inclined inwards are formed in the upper side and the lower side of the outer wall of the cross beam (9), the inclined planes consistent with the inclined angle of the outer wall of the cross beam (9) are formed in the inner wall of the rubber pad (8), the inclination of the inner wall of the groove (10) is consistent with the inclination of the tail end of the outer wall of the roller (207), and the contact part of the inner wall of the groove (10) and the outer wall of the roller (207) is perfectly fit.