CN219040360U - Stroke-adjustable contactor - Google Patents

Abstract

The application relates to the technical field of contactors, in particular to a stroke-adjustable contactor, which comprises a shell, an armature, a magnetic yoke, an adjusting device and a rotation stopping assembly, wherein the armature is arranged on the shell; the magnetic yoke is connected with the shell, and the armature is arranged on the moving path of the magnetic yoke; the adjusting device comprises a cam, wherein the cam is rotationally connected with the shell of the contactor, and when the cam rotates along a preset direction, the cam pushes the magnetic yoke to move along a direction approaching to or away from the armature; the rotation stopping component is arranged on the shell and used for limiting the cam; the position of the magnetic yoke is adjusted by rotating the cam, the cam is limited by the rotation stopping assembly, the position of the magnetic yoke is fixed, the distance between the magnetic yoke and the armature is shortened or increased finally, the stroke of the contactor is adjustable, the size of the contact loss is compensated by adjusting the stroke of the contactor, and the service life of the contactor is prolonged.

Description

Stroke-adjustable contactor

Technical Field

The application relates to the technical field of circuit protection, in particular to a stroke-adjustable contactor.

Background

The contactor is widely applied to a low-voltage circuit, is an industrial necessity with safe use, convenient control, large quantity and wide range, and has the working principle that when the electromagnetic coil of the contactor is not electrified, the reaction force of the spring and the dead weight of the armature keep the contact of the movable contact at the opening position. When the electromagnetic coil is connected with control voltage (generally rated voltage) through the control loop, the electromagnetic force overcomes the reaction force of the spring to attract the armature to the magnetic yoke and drive the moving contact to move towards the fixed contact, so that the contact is closed and the circuit is connected. The conventional contactor is widely used as an electric power on-off and control circuit, and the circuit is opened and closed by using contacts.

However, with the use of the contactor, the contacts on the contactor contacts are worn, so that the contact overrun is reduced, the contact pressure is insufficient, the contact resistance between the moving contact and the fixed contact is larger, the contact heats, the breaking speed of the moving contact and the fixed contact is reduced, the arc breaking time is prolonged, the contact loss is increased, and finally the contactor is invalid.

Disclosure of Invention

In view of the above, embodiments of the present application provide a stroke-adjustable contactor, which compensates for the size of contact loss by adjusting the position of a yoke, and has the effects of prolonging the service life of the contactor and ensuring the working performance of the contactor.

The embodiment of the application provides a contactor with adjustable stroke, including casing, armature and yoke all locate in the casing, still include: an adjustment device and a rotation stopping assembly; the magnet yoke is connected with the shell, and the armature iron is arranged on the moving path of the magnet yoke; the adjusting device comprises a cam, wherein the cam is rotationally connected with the shell of the contactor, and when the cam rotates along a preset direction, the cam pushes the magnetic yoke to move along a direction approaching to or away from the armature; the rotation stopping component is arranged on the shell and used for limiting the cam.

Through the scheme, when the distance between the magnetic yoke and the armature needs to be adjusted, the cam is rotated; when the cam rotates in a preset direction, the convex part of the cam pushes the magnetic yoke to move in a direction approaching or separating from the armature so as to shorten or increase the distance between the magnetic yoke and the armature; after the magnetic yoke moves to the target position, the cam is limited by the rotation stopping assembly, so that the position of the magnetic yoke is fixed; therefore, the distance between the magnetic yoke and the armature can be adjusted, the stroke of the contactor can be adjusted, the distance between the magnetic yoke and the armature can be adjusted according to the loss of the contact on the contact, the distance between the magnetic yoke and the armature can be increased, the over-stroke of the contactor can be increased, the contact resistance between the moving contact and the fixed contact can be increased due to the fact that the pressure between the moving contact and the fixed contact is reduced after the moving contact is prevented from being contacted with the fixed contact, the breaking speed of the moving contact and the fixed contact is reduced, and the service life of the contactor can be prolonged.

In some embodiments of the present application, the outer wall of the magnetic yoke is provided with a groove, the cam is located in the groove, and when the cam rotates along a preset direction, the peripheral wall of the cam is abutted with the inner wall of the groove, and the magnetic yoke is pushed to move along a direction close to or far away from the armature.

Through above-mentioned scheme, along with the rotation of cam, the cam will be through exerting thrust to the inner wall of recess for the yoke is along being close to or keeping away from the direction removal of armature, and the cam is located the recess, can avoid increasing the volume of contactor.

In some embodiments of the present application, a rotating shaft is fixed on the cam, a limiting groove is arranged on the shell, and the rotating shaft is rotationally connected with the shell through the limiting groove; the rotation stopping assembly comprises a first rotation stopping piece and a second rotation stopping piece, the first rotation stopping piece is arranged on the rotating shaft, the second rotation stopping piece is arranged on the shell, the rotating shaft can axially move in the limiting groove to drive the first rotation stopping piece to be far away from or close to the second rotation stopping piece, and when the rotating shaft drives the first rotation stopping piece to move to a preset position, the first rotation stopping piece is matched with the second rotation stopping piece to prevent the rotating shaft from driving the cam to rotate.

According to the technical scheme, when the distance between the magnetic yoke and the armature needs to be adjusted, the rotating shaft is moved along the axial direction, so that the first rotation stopping piece and the second rotation stopping piece are separated from the matched state, and then the cam is rotated through the rotating shaft, so that the distance between the magnetic yoke and the armature is adjusted; after the magnetic yoke moves to the target position, the rotating shaft is moved along the axial direction, so that the first rotation stopping piece moves to a preset position to be matched with the second rotation stopping piece, and the magnetic yoke position is fixed; therefore, the distance between the magnetic yoke and the armature is adjustable, the stroke of the contactor can be adjusted, the cam is rotated by the aid of the rotating shaft, the cam is prevented from rotating by the aid of axial movement of the rotating shaft, and the device is simple in structure and convenient to operate.

In some embodiments of the present application, the first rotation stopping member includes a gear, the second rotation stopping member includes a limiting tooth, the limiting tooth is matched with the gear, the limiting tooth is disposed on the housing, and the gear is coaxially connected with the rotating shaft; when the limiting teeth are meshed with the gear, the limiting teeth prevent the gear from rotating.

According to the technical scheme, when the distance between the magnetic yoke and the armature needs to be adjusted, the rotating shaft is firstly enabled to move in the limiting groove so as to drive the gear to be far away from the limiting teeth, when the limiting teeth and the gear are in a disengaged state, the rotating shaft is rotated to drive the cam to adjust the position of the magnetic yoke, and when the magnetic yoke moves to a target position, the rotating shaft is used for driving the gear to move in a direction close to the limiting teeth until the gear is engaged with the limiting teeth, and at the moment, the limiting teeth can prevent the gear from rotating; therefore, the gear is limited through the limiting teeth, the rotating shaft can be prevented from driving the cam to rotate, the stability of the relative position between the magnetic yoke and the armature is guaranteed, and therefore the stability of the contactor in operation is guaranteed.

In some embodiments of the present application, a limiting member is disposed on the housing, and the limiting member is abutted with an outer wall of the rotating shaft, so as to prevent the rotating shaft from moving along the axial direction.

Through above-mentioned scheme, the locating part can prevent that the pivot from driving the gear and follow axial displacement to make gear and spacing tooth can keep the meshing state, guarantee the stability of relative position between yoke and the armature, thereby guarantee the stability of contactor during operation.

In some embodiments of the present application, the limiting member includes a limiting block, and the limiting block abuts against the peripheral wall of the rotating shaft.

Through the scheme, the limiting block can prevent the rotating shaft from driving the gear to axially separate from the limiting teeth under the condition that the rotating shaft is not subjected to enough external force, so that the gear and the limiting teeth can be kept in a meshed state.

In some embodiments of the present application, the stopper is equipped with the polylith, and the yoke is located between arbitrary two adjacent stoppers, and the lateral wall of the stopper that is located the yoke both sides all with the lateral wall butt of yoke.

Through above-mentioned scheme, the stopper can be spacing to the yoke, avoids the yoke to take place the skew at the removal in-process, influences the contact of yoke and armature to influence the work effect of contactor.

In some embodiments of the present application, the polylith stopper includes two piece at least elastic blocks in, and the cam is located between two arbitrary adjacent elastic blocks, and when first piece and the second piece that splines were joined in marriage, the lateral wall that is located the elastic block of cam both sides all with the lateral wall butt of cam.

Through the scheme, when the rotating shaft drives the gear to axially move away from the limiting teeth, the rotating shaft drives the cam to extrude the elastic block, so that the elastic block is abutted with the cam, the cam applies pressure to the side wall of the elastic block, the elastic block is deformed, at the moment, if no external force is continuously applied to the rotating shaft, the rotating shaft drives the gear and the cam to reset under the elastic action of the elastic block, and the gear is meshed with the limiting teeth; so, after the yoke removes to the target position, through the elastic block, can make the pivot drive cam and gear automatic re-setting, and the elastic block is located the both sides of cam, can prevent the cam along axial displacement to prevent the pivot to drive the gear along axial displacement, make gear and spacing tooth can keep the meshing state, make the relative position keep invariable between yoke and the armature, improve the stability of contactor work.

In some embodiments of the present application, the end of the shaft is provided with a driving part through which the shaft is moved.

Through above-mentioned scheme, the setting of drive division is more convenient for remove the pivot to make the pivot can drive the position of cam adjustment yoke.

In some embodiments of the present application, the end of the shaft is provided with a marking for indicating the circumferential position of the cam.

Through above-mentioned scheme, through the sign portion, can judge the rotation amplitude of pivot to confirm the current position of yoke, with the distance between in order to control yoke and the armature, reach through adjusting the distance between yoke and the armature, realize compensating the mesh of the size of contact loss.

According to the contactor with the adjustable stroke, the position of the magnetic yoke can be adjusted by rotating the rotating shaft to drive the cam, the rotating shaft is limited by the rotation stopping assembly, the position of the magnetic yoke is fixed, the distance between the magnetic yoke and the armature is finally shortened or increased, the stroke of the contactor can be adjusted, the stroke of the contactor can be changed, the size of the contact loss is compensated, and the contact resistance between the moving contact and the fixed contact is increased and the breaking speed of the moving contact and the fixed contact is reduced due to the fact that the pressure between the moving contact and the fixed contact is reduced after the moving contact is contacted with the fixed contact; thus, the service life of the contactor can be prolonged.

The foregoing description is only an overview of the technical solutions of the embodiments of the present application, and may be implemented according to the content of the specification, so that the technical means of the embodiments of the present application can be more clearly understood, and the following detailed description of the present application will be presented in order to make the foregoing and other objects, features and advantages of the embodiments of the present application more understandable.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of a stroke-adjustable contactor according to an embodiment of the present application;

fig. 2 is a schematic view of a part of a structure of a stroke-adjustable contactor according to an embodiment of the present application.

Description of the drawings:

1. a housing; 11. a limit groove; 12. limit teeth; 13. a limiting block; 14. an adjustment aperture; 2. a yoke; 21. a groove; 3. a rotating shaft; 31. a cam; 32. a gear; 33. a driving section; 34. a marking part; 4. an armature; 5. a moving contact support; 51. releasing the spring; 6. a moving contact; 7. and (5) a static contact.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, based on the embodiments herein, which would be apparent to one of ordinary skill in the art without making any inventive effort, are intended to be within the scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the applications herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

The terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the drawings are intended to cover, but not exclude, other matters. The word "a" or "an" does not exclude the presence of a plurality.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of the phrase "an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

The directional terms appearing in the following description are all directions shown in the drawings and are not limiting to the specific structure of the circuit breaker of the present application. For example, in the description of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

Further, expressions of directions of indication for explaining the operation and construction of the respective members of the circuit breaker of the present embodiment, such as the X-direction, the Y-direction, and the Z-direction, are not absolute but relative, and although these indications are appropriate when the respective members of the battery pack are in the positions shown in the drawings, when these positions are changed, these directions should be interpreted differently to correspond to the changes.

Furthermore, the terms first, second and the like in the description and in the claims of the present application or in the above-described figures, are used for distinguishing between different objects and not for describing a particular sequential order, and may be used to expressly or implicitly include one or more such features.

In the description of the present application, unless otherwise indicated, the meaning of "plurality" means two or more (including two), and similarly, "plural sets" means two or more (including two).

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, e.g., the terms "connected" or "coupled" of a mechanical structure may refer to a physical connection, e.g., the physical connection may be a fixed connection, e.g., by a fastener, such as a screw, bolt, or other fastener; the physical connection may also be a detachable connection, such as a snap-fit or snap-fit connection; the physical connection may also be an integral connection, such as a welded, glued or integrally formed connection. "connected" or "connected" of circuit structures may refer to physical connection, electrical connection or signal connection, for example, direct connection, i.e. physical connection, or indirect connection through at least one element in the middle, so long as circuit communication is achieved, or internal communication between two elements; signal connection may refer to signal connection through a medium such as radio waves, in addition to signal connection through a circuit. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

As shown in fig. 1, the embodiment of the present application provides a stroke-adjustable contactor, which comprises a housing 1, an armature 4, a yoke 2, an adjusting device and a rotation stopping assembly; wherein, armature 4, yoke 2, adjusting device and the subassembly that splines all are located the casing 1 of contactor, and yoke 2 is connected with casing 1, and armature 4 sets up on the travel path of yoke 2, and armature 4 is connected with the moving contact support 5 of contactor, and yoke 2 is located the one side that armature 4 kept away from moving contact support 5.

In some embodiments of the present application, the moving contact support 5 is further slidingly connected with the moving contact 6 in the contactor, and a release spring 51 is arranged between the moving contact support 5 and the moving contact 6, the fixed contact 7 is arranged on one side of the moving contact 6 deviating from the release spring 51, the armature 4 and the magnetic yoke 2 are both located on one side of the fixed contact 7 deviating from the moving contact 6, and the distance between the armature 4 and the magnetic yoke 2 should be always greater than the distance between the fixed contact 7 and the moving contact 6. In practical application, after the contactor is powered on, coil current in the contactor can generate a magnetic field, the generated magnetic field can enable the magnetic yoke 2 to generate electromagnetic attraction, and the moving contact 6 is driven to move towards the fixed contact 7 through the moving contact bracket 5 until the contact of the moving contact 6 is abutted with the contact of the fixed contact 7, so that a circuit is conducted. During the moving process of the moving contact 6, the armature 4 moves along with the moving contact bracket 5 toward the yoke 2; the moving contact support 5 drives the armature 4 to continuously move towards the magnetic yoke 2, so that the release spring 51 is extruded by the moving contact support 5 and the moving contact 6 and deforms until the armature 4 is abutted against the magnetic yoke 2; at this time, the armature 4 and the yoke 2 will remain connected by the electromagnetic attraction force generated by the yoke 2, thereby enabling the circuit to remain in a conductive state. Under the condition that a circuit is in fault, a coil in the contactor is powered off, so that a magnetic field disappears, the magnet yoke 2 loses electromagnetic attraction, and at the moment, under the action of the release spring 51, the moving contact support 5 drives the armature 4 and the moving contact 6 to reset, so that the circuit is disconnected.

As shown in fig. 2, in the embodiment of the present application, the adjusting device includes a cam 31, where the cam 31 is rotationally connected with the housing 1 of the contactor, and when the cam 31 rotates in a preset direction, along with rotation of the cam 31, a peripheral wall of the cam 31 contacts with the yoke 2, so as to push the yoke 2 to move in a direction approaching or separating from the armature 4, so as to shorten or increase a distance between the yoke 2 and the armature 4; illustratively, when the peripheral wall corresponding to the convex portion of the cam 31 contacts the yoke 2, the distance between the yoke 2 and the armature 4 will be shortened; when the peripheral wall of the cam 31 corresponding to the non-protruding portion contacts the yoke 2, the distance between the yoke 2 and the armature 4 increases. A rotation stop assembly is provided on the housing 1 for limiting the cam 31 so that the yoke 2 is fixed at a target position. The anti-rotation component may be a rubber block connected to the housing through a bracket, when the position of the yoke 2 needs to be adjusted, the housing 1 may be opened, the cam 31 is rotated to adjust the position of the yoke 2, then the rubber block is abutted to the outer wall of the cam 31, the cam 31 is limited by friction between the rubber block and the cam 31, and finally the housing 1 is reset to complete the adjustment of the stroke of the contactor.

As shown in fig. 2, in some embodiments of the present application, a rotating shaft 3 is fixed on a cam 31, a limiting groove 11 is provided on a housing 1, and the rotating shaft 3 is rotatably connected with the housing 1 through the limiting groove 11. The cam 31 is configured to apply a force to the yoke 2 to move toward the armature 4 or to move away from the armature 4 in response to the rotation of the shaft 3, and the cam 31 may be any structure capable of achieving the above-described function. By way of example, the cam 31 may be any structure in which two points are present on the circumference at unequal distances from the axis of the rotating shaft 3, such as: a circular rotating wheel connected with the rotating shaft 3 in an eccentric way, a protrusion fixed on the peripheral wall of the rotating shaft 3, and the like; the cam 31 may be any structure capable of applying a force to the yoke 2 toward the armature 4 when the peripheral wall abuts against the yoke 2, wherein the force is larger than the elastic force of the release spring 51 in the contactor so that the yoke 2 can move toward the armature 4 under the force as the rotating shaft 3 rotates. The embodiments of the present application are not limited.

The rotation stopping assembly comprises a first rotation stopping piece and a second rotation stopping piece, the first rotation stopping piece is arranged on the rotating shaft 3, the second rotation stopping piece is arranged on the shell 1, the rotating shaft 3 can axially move in the limiting groove 11 so as to drive the first rotation stopping piece to be far away from or close to the second rotation stopping piece, and when the rotating shaft 3 drives the first rotation stopping piece to move to a preset position, the first rotation stopping piece is matched with the second rotation stopping piece to prevent the rotating shaft 3 from driving the cam 31 to rotate; the first rotation stopping piece comprises a gear 32, the second rotation stopping piece comprises a limiting tooth 12, the limiting tooth 12 is matched with the gear 32, the limiting tooth 12 is arranged on the shell 1, and the gear 32 is coaxially connected with the rotating shaft 3; the rotating shaft 3 moves axially in the limiting groove 11 to drive the gear 32 to be close to or far away from the limiting teeth 12, and when the limiting teeth 12 and the gear 32 are in a meshed state, the limiting teeth 12 prevent the gear 32 from rotating. When the distance between the magnetic yoke 2 and the armature 4 needs to be adjusted, the rotating shaft 3 moves in the limiting groove 11 to drive the gear 32 to be far away from the limiting teeth 12, when the limiting teeth 12 cannot limit the gear 32, the rotating shaft 3 is rotated, the position of the magnetic yoke 2 is adjusted through the cam 31, when the magnetic yoke 2 moves to a target position, the rotating shaft 3 is reset, and at the moment, the limiting teeth 12 are meshed with the gear 32, so that the gear 32 is prevented from rotating; therefore, the limiting teeth 12 can limit the gear 32, so that when the limiting teeth 12 are meshed with the gear 32, the stability of the relative position between the magnetic yoke 2 and the armature 4 can be ensured, and the stability of the contactor during operation is ensured. The limiting groove 11 is cylindrical, and the inner peripheral wall is attached to the outer peripheral wall of the rotating shaft 3 so as to prevent the rotating shaft 3 from moving along the radial direction, and a space for the rotating shaft 3 to move along the axial direction is arranged or reserved at the end opening of the limiting groove 11; the gear 32 is fixed at the end part of the rotating shaft 3, the limiting teeth 12 are arranged at the end part of the limiting groove 11, and the limiting teeth 12 can be arranged on the inner wall of the limiting groove 11 under the condition that the diameter of the gear 32 is the same as the diameter of the rotating shaft 3; the length of the area provided with the limiting teeth 12 on the shell 1 is greater than the thickness of the gear 32, the limiting effect of the limiting teeth 12 on the gear 32 is guaranteed, the limiting teeth 12 can be provided with a plurality of limiting teeth 12, and the plurality of limiting teeth 12 are matched with tooth grooves on the gear 32 to be distributed.

In some embodiments of the present application, the outer wall of the magnetic yoke 2 is provided with the groove 21, the cam 31 is located in the groove 21, and when the cam 31 rotates along the preset direction, the peripheral wall of the cam 31 abuts against the inner wall of the groove 21, and applies a pushing force to the inner wall of the groove 21 to push the magnetic yoke 2 to move along the direction away from or close to the armature 4. It will be appreciated that the recess 21 is provided in the outer wall of the yoke 2 and the cam 31 is fitted into the recess 21, so that the increase in the volume of the contactor can be avoided. Wherein the limit groove 11 may be located at a side of the recess 21.

It should be noted that, when the rotating shaft 3 drives the cam 31 to rotate along the preset direction, the cam 31 pushes the yoke 2 to move along the direction away from the armature 4, an elastic member that enables the yoke 2 to move along the direction close to the armature 4 can be disposed between the yoke 2 and the housing 1, at this time, if the rotating shaft 3 drives the cam 31 to rotate along the opposite direction of the preset direction, the circumferential wall of the cam 31 does not apply a pushing force to the yoke 2, and the yoke 2 will move along the direction close to the armature 4 under the action of the elastic member. Therefore, the rotating shaft 3 can be rotated to drive the cam 31 to adjust the position of the magnetic yoke 2, so that the distance between the magnetic yoke 2 and the armature 4 is shortened or increased, the stroke of the contactor is changed, and the purpose of compensating the size of the contact loss is achieved. The preset direction may be either clockwise or counterclockwise, which is not limited in this embodiment of the present application.

As shown in fig. 2, in some embodiments of the present application, a limiting member is disposed on the housing 1, and the limiting member abuts against an outer wall of the rotating shaft 3, so as to prevent the rotating shaft 3 from moving along an axial direction, so that the gear 32 and the limiting teeth 12 can maintain an engaged state. The limiting part may be a spring bean-jumping device arranged on the casing 1, when the spring bean-jumping device is in a natural state, the outer peripheral wall of the spring bean-jumping device is abutted against the outer wall of the end part of the rotating shaft 3 to prevent the rotating shaft 3 from moving axially, wherein a hole for accommodating the spring bean-jumping device is formed in the casing 1 in a matching manner, when the rotating shaft 3 receives a large enough external force, the rotating shaft 3 axially drives the gear 32 to be far away from the limiting teeth 12, the spring bean-jumping device is extruded, so that the spring bean-jumping device moves into the hole, and when the rotating shaft 3 axially drives the gear 32 to move to the gear 32 to be meshed with the limiting teeth 12, the spring bean-jumping device stretches out of the hole under the action of elastic force to prevent the rotating shaft 3 from moving axially.

In some embodiments of the present application, the locating part includes stopper 13, stopper 13 and the outer peripheral wall butt of pivot 3, wherein, pivot 3 can run through stopper 13 to with the little interference fit of stopper 13, under the condition that pivot 3 does not receive sufficient external force, stopper 13 can prevent that pivot 3 from driving the gear and keeping away from spacing tooth 12 along the axial like this, makes gear 32 and spacing tooth 12 can keep the meshing state. The stopper 13 is equipped with the polylith, and yoke 2 is located between arbitrary two adjacent stopper 13, and the lateral wall of the stopper 13 that is located yoke 2 both sides all with the lateral wall butt of yoke 2 to carry out spacing to yoke 2, avoid yoke 2 at the removal in-process, the position takes place the skew, influences the contact of yoke 2 and armature 4, thereby influences the work effect of contactor. The plurality of limiting blocks 13 comprise at least two elastic blocks, the cam 31 is positioned between any two adjacent elastic blocks, and when the first rotation stopping piece and the second rotation stopping piece are matched, namely, when the gear 32 and the limiting teeth 12 are in a meshed state, the side walls of the elastic blocks positioned at two sides of the cam 31 are abutted with the side walls of the cam 31; it can be understood that when the rotating shaft 3 drives the gear 32 to axially separate from the limiting teeth 12, the rotating shaft 3 can drive the cam 31 to squeeze the elastic block, so that the side wall of the elastic block, which is abutted against the cam 31, is deformed, at this time, if no external force is applied to the rotating shaft 3, the rotating shaft 3 drives the gear 32 and the cam 31 to reset under the action of the elastic force of the elastic block, so that the gear 32 and the limiting teeth 12 are meshed; so, after yoke 2 removes to the target position, through the elastic block, can make pivot 3 drive cam 31 and gear 32 automatic re-setting, and the elastic block is located the both sides of cam 31, can prevent cam 31 along axial displacement through spacing to cam 31 to prevent pivot 3 along axial displacement, realize further spacing to pivot 3, make the relative position keep invariable between yoke 2 and the armature 4, improve the stability of contactor work. It should be noted that the elastic block may be a rubber block, and the thickness of the cam 31 is the same as the width of the yoke 2, and at this time, the two limiting blocks 13 may be two, that is, the two limiting blocks are all elastic blocks and are respectively disposed on two sides of the cam 3 and the yoke 2.

As shown in fig. 2, in some embodiments of the present application, a driving part 33 is provided at an end of the rotating shaft 3, the rotating shaft 3 is moved by the driving part 33, and an identification part 34 is provided at the end of the rotating shaft 3, and the identification part 34 is used for indicating a circumferential position of the cam 31, so as to identify a rotation amplitude of the rotating shaft 3. The driving part 33 may be disposed at an end of the rotating shaft 3 where the gear 32 is disposed, so that pushing the rotating shaft 3 can make the rotating shaft 3 drive the gear 32 to move along a direction away from the limiting teeth 12; the marking portion 34 may be provided at an end portion of the rotating shaft 3 where the adjusting key is provided, and the moving and rotating of the rotating shaft 3 may be performed simultaneously or separately, which is not limited in the embodiment of the present application. Through drive portion 33, can be more convenient for remove pivot 3 like this to make pivot 3 can drive cam 31 adjustment yoke 2's position, when rotating pivot 3, can judge the rotation range of pivot 3 through sign portion 34, thereby confirm yoke 2 current position, in order to control the distance between yoke 2 and armature 4, reach through the distance between adjustment yoke 2 and armature 4, realize compensating the mesh of the size of contact loss.

In some embodiments of the present application, the driving part 33 may be connected to the end of the rotating shaft 3, and in practical application, the rotating shaft 3 is moved or rotated by pinching the cam 3 with a hand or a tool; the driving part 33 may also be an adjusting groove, which may be formed in a straight shape or a cross shape in cooperation with a screwdriver, and in practical application, the rotating shaft 3 is moved or rotated by inserting the matched screwdriver into the adjusting groove. When the driving portion 33 is a linear adjusting slot, the marking portion 34 may be a triangular slot, and is disposed at one end of the adjusting slot, and forms an arrow mark with the adjusting slot, and when the contactor leaves the factory, the arrow formed by the marking portion 34 and the adjusting slot should point upward, that is, the direction in which the yoke 2 moves toward the armature 4.

As shown in fig. 2, in some embodiments of the present application, an end portion of the rotating shaft 3 is located in the housing 1, and an adjusting hole 14 is formed on a side wall of the housing 1, where the adjusting hole 14 faces the marking portion 34. In practical application, a tool or a hand can be inserted into the adjusting hole 14, and then the driving part 33 moves or rotates the rotating shaft 3, so that the situation that the rotating shaft 3 moves and/or rotates due to misoperation can be avoided, and the position of the magnetic yoke 2 changes, and finally the working effect of the contactor is affected. Wherein, the two side walls of the shell 1 are provided with the adjusting holes 14, so that when the rotating shaft 3 cannot be reset under the elastic action of the elastic block, an external force can be applied to the rotating shaft 3 through the adjusting holes 14 arranged on one side of the shell 1 far away from the gear 32, so that the rotating shaft 3 moves to the gear 32 along the axial direction to be meshed with the limiting teeth 12.

The working principle of the embodiment of the application is as follows: when the distance between the magnet yoke 2 and the armature 4 needs to be adjusted, the driving part 33 enables the rotating shaft 3 to drive the gear 32 to move along the axial direction, after the gear 32 is separated from the limiting teeth 12, the rotating shaft 3 is rotated to drive the cam 31 to rotate, when the cam 31 rotates along the preset direction, the protruding part of the cam 31 pushes the magnet yoke 2 to move towards the armature 4, and when the cam 31 rotates along the reverse direction of the preset direction, the magnet yoke 2 moves towards the direction away from the armature 4 under the action of gravity so as to increase the distance between the magnet yoke 2 and the armature 4, thereby increasing the over travel of the contactor. After the magnetic yoke 2 moves to the target position, the external force applied to the rotating shaft 3 is removed, the rotating shaft 3 moves axially until the gear 32 is meshed with the limiting teeth 12 under the action of the elastic force of the rotation stopping assembly, at the moment, the limiting teeth 12 limit the gear 32, and the limiting piece 13 limits the rotating shaft 3, so that the position of the magnetic yoke 2 is fixed, and the stroke of the contactor is adjusted; therefore, the distance between the magnetic yoke and the armature can be adjusted, and the stroke of the contactor can be adjusted; in practical application, after the over-travel refers to complete closing of the contactor, the fixed contact is moved away, the moving contact continues to move by a distance which can be understood as the thickness of a contact on the moving contact, therefore, according to the loss of the contact on the contact, the distance between the magnetic yoke 2 and the armature 4 is adjusted, the size of the loss of the contact can be compensated, the contact resistance between the moving contact 6 and the fixed contact 7 is increased due to the fact that the pressure between the moving contact 6 and the fixed contact 7 is reduced after the moving contact 6 is contacted with the fixed contact 7, the breaking speed of the moving contact 6 and the fixed contact 7 is reduced, and the service life of the contactor can be prolonged.

Those skilled in the art will appreciate that while some embodiments herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the present application and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.

The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.

Claims (10)

1. The utility model provides a stroke adjustable contactor, includes casing, armature and yoke, the armature with the yoke is all located in the casing, its characterized in that still includes: an adjustment device and a rotation stopping assembly; wherein,,

the magnet yoke is connected with the shell, and the armature is arranged on the moving path of the magnet yoke;

the adjusting device comprises a cam, wherein the cam is rotationally connected with a shell of the contactor, and when the cam rotates along a preset direction, the cam pushes the magnetic yoke to move along a direction approaching to or separating from the armature;

the rotation stopping assembly is arranged on the shell and used for limiting the cam.

2. The stroke-adjustable contactor according to claim 1, wherein the outer wall of the yoke is provided with a groove, the cam is located in the groove, and when the cam rotates in a preset direction, the peripheral wall of the cam abuts against the inner wall of the groove and pushes the yoke to move in a direction approaching or separating from the armature.

3. The stroke-adjustable contactor according to claim 1, wherein a rotating shaft is fixed to the cam, a limit groove is formed in the housing, and the rotating shaft is rotatably connected with the housing through the limit groove;

the rotation stopping assembly comprises a first rotation stopping piece and a second rotation stopping piece, the first rotation stopping piece is arranged on the rotating shaft, the second rotation stopping piece is arranged on the shell, the rotating shaft can axially move in the limiting groove to drive the first rotation stopping piece to be far away from or close to the second rotation stopping piece, and when the rotating shaft drives the first rotation stopping piece to move to a preset position, the first rotation stopping piece is matched with the second rotation stopping piece to prevent the rotating shaft from driving the cam to rotate.

4. The stroke-adjustable contactor according to claim 3, wherein said first rotation stop comprises a gear, said second rotation stop comprises a spacing tooth, said spacing tooth being mated with said gear, said spacing tooth being disposed on said housing, said gear being coaxially connected with said shaft; when the limiting teeth are in a meshed state with the gear, the limiting teeth prevent the gear from rotating.

5. A stroke-adjustable contactor according to claim 3, wherein the housing is provided with a stopper which abuts against an outer wall of the shaft and is adapted to prevent the shaft from moving in an axial direction without the shaft being subjected to an external force.

6. The stroke-adjustable contactor according to claim 5, wherein said stopper comprises a stopper abutting against an outer peripheral wall of said rotary shaft.

7. The stroke-adjustable contactor according to claim 6, wherein the stopper has a plurality of stopper pieces, the yoke is located between any two adjacent stopper pieces, and side walls of the stopper pieces located on both sides of the yoke are abutted against side walls of the yoke.

8. The stroke-adjustable contactor according to claim 7, wherein a plurality of the stoppers include at least two elastic blocks, the cam is located between any two adjacent elastic blocks, and when the first rotation stopper and the second rotation stopper are engaged, side walls of the elastic blocks located on both sides of the cam are abutted against side walls of the cam.

9. A stroke adjustable contactor according to claim 3, wherein the end of the shaft is provided with a drive portion by which the shaft is moved.

10. A stroke adjustable contactor according to claim 3, wherein the end of the shaft is provided with a marking for indicating the circumferential position of the cam.

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