CN108777245B - Lever component, bottom cover, transmission mechanism and circuit breaker of low-voltage circuit breaker - Google Patents
Lever component, bottom cover, transmission mechanism and circuit breaker of low-voltage circuit breaker Download PDFInfo
- Publication number
- CN108777245B CN108777245B CN201810731227.1A CN201810731227A CN108777245B CN 108777245 B CN108777245 B CN 108777245B CN 201810731227 A CN201810731227 A CN 201810731227A CN 108777245 B CN108777245 B CN 108777245B
- Authority
- CN
- China
- Prior art keywords
- circuit breaker
- leaning
- voltage circuit
- bottom cover
- embedded
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/50—Manual reset mechanisms which may be also used for manual release
- H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/02—Housings; Casings; Bases; Mountings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
Abstract
The invention belongs to the technical field of circuit breakers, and provides a lever component of a low-voltage circuit breaker, a bottom cover (9) matched with the lever component for use, a transmission mechanism (16) comprising the lever component and the circuit breaker. The device has the advantages of stable structure, difficult running and falling, rapid assembly, high assembly accuracy and the like.
Description
Technical Field
The invention belongs to the technical field of circuit breakers, relates to a circuit breaker and an assembly structure, and in particular relates to a lever component, a bottom cover, a transmission mechanism and a circuit breaker of a low-voltage circuit breaker.
Background
The circuit breaker is a switching device capable of closing, carrying and opening a current under normal circuit conditions, and capable of closing, carrying and opening a current under abnormal circuit conditions for a prescribed time. The switching of the opening and closing state corresponds to different limit positions of the movable assembly in the movable assembly, specifically, an operator changes the space position and/or angle of the handle to change the space position and/or angle of the handle from one limit state to the other limit state, at the moment, the handle or the transmission mechanism which forms a linkage relation with the handle is driven by the connecting rod to move together, and the movable contact which forms another linkage relation with the transmission mechanism forms a folding or separating state with the fixed contact, so that the closing or opening and closing of the current is finally completed.
The structure of various low-voltage circuit breakers is substantially similar, since the operating mechanisms on which they depend are the same, with the differences generally being reflected in the structural composition of the transmission mechanism, in particular in the shape of the various parts involved and in the manner of transmission and the positional relationship with each other. But the same problem inevitably exists: the transmission assembly is difficult to assemble manually and is prone to accidental disengagement from the operating position prior to closing the cover.
The problem is mainly caused by two points:
firstly, the transmission assembly in the low-voltage circuit breaker is small in size due to the small whole size of the low-voltage circuit breaker, so that the difficulties of hand holding, visual alignment, installation and final alignment are improved;
and the second point is that the whole transmission mechanism is fixed through three points before closing the cover, and is respectively fixed by utilizing the shaft connection rod to be in shaft connection with the bottom cover, one end of the transmission mechanism is abutted against the side wall of the bottom cover by virtue of a fixed pressure spring, and the other end of the transmission mechanism is reversely pressed against the side column of the bottom cover by virtue of the elasticity of the pressure spring. Firstly, in order to improve the assembly success rate, the inner edge of the insertion hole on the bottom cover is provided with a sliding-in inclined plane, and particularly referring to fig. 1 and 2, so that the shaft connecting rod can gradually slide in to complete the assembly action when not aligning with the insertion hole, but the design leads to a shallow insertion depth of the actual interaction between the shaft connecting rod and the bottom cover, so that the shaft connecting rod can easily slide out of the insertion hole. And secondly, the compression spring is easy to bend due to vibration or deflection caused by stress under the compression state, so that the axial force of the shaft connecting rod is generated, and the shaft connecting rod is more easy to separate from the insertion hole. In addition, the other end of the transmission mechanism is abutted against the side column of the bottom cover by means of the elastic force of the pressure spring, so that the elastic strength of the handle is moderate, the elastic holding quantity of the pressure spring is not very large in design, and the abutting surface between the transmission mechanism and the side column of the bottom cover is smooth, so that the compaction and fixation mode is usually not very firm due to insufficient friction force; in some designs, the transmission mechanism is not provided with a third fixed point except for indirect fixation by a spring and plug-in fixation of the shaft connecting rod, so that the transmission mechanism is more likely to be accidentally separated from the working position.
Referring to patent document 1, an operating mechanism of a miniature circuit breaker is described in patent document 1, in which a transmission mechanism is an assembly of a lever, a contact support, a moving contact, and a mechanism rotation shaft, as shown in fig. 3 and 4 of the patent document. When the worker assembles, first step: tilting to align and approach the energy storage spring to the contact part of the shell; and a second step of: after touching, the positions of the rotating shaft of the mechanism and the shaft hole of the shell are found and pressed down to be inserted; and a third step of: the energy storage spring is forcefully compressed and is released after the position of the transmission mechanism is aligned, so that the lever of the transmission mechanism is abutted against the side column of the shell. In the process, as the first step is initially inclined, the energy storage spring is easy to transversely bend when the transmission mechanism gradually presses down, and if the mechanism rotating shaft and the shell shaft hole are in one-time alignment error at the moment, the energy storage spring is easy to slide between the contact part of the energy storage spring and the shell to be separated, so that the action of installing the energy storage spring in the first step fails. In addition to the above, the energy storage spring is not placed deep enough, which easily causes the transmission mechanism to float in a virtual way, and the action of the rear-section buckle closure cannot be performed and reworking is needed. Even when the installation of the energy storage spring in the first step is completed, and the rotation shaft of the mechanism in the second step is installed with the shaft hole of the shell, the energy storage spring is released manually and quickly in the third step, so that the lever of the transmission mechanism is hit on the side column, the energy storage spring is enabled to vibrate and slide transversely to be separated, and the whole installation action is failed. In addition, even if the first step, the second step and the third step are all completed, the top cover is not buckled at the moment, and the transmission mechanism is dislocated still due to factors such as vibration generated when a worker places a semi-finished product on the conveyor belt, accidental overturning or uneven pressing caused by the fact that personnel at the lower end of the assembly line pick up and re-operate the semi-finished product.
In this case, the cause of the problem and the diversity of the problem can be clarified at a plurality of angles by referring to patent documents 2 to 14.
Patent literature
Patent document 1: chinese patent CN201620033978.2, operating mechanism for miniature circuit breaker, of applicant's Zhejiang zhngtai electric apparatus company, inc.
Disclosure of Invention
The problems to be solved by the invention include:
1. the transmission mechanism is separated due to the change of the stress direction due to the vibration of the spring caused by various factors;
2. because the shaft connecting rod is positioned on the back of the sight line, the manual visual calibration is difficult, and the assembly efficiency and the assembly success rate are low;
3. the shaft connecting rod is inserted into the insertion hole too shallow, so that the transmission mechanism is easy to swing to deviate from;
4. the top cover cannot be buckled due to the clamping and virtual floating of the transmission mechanism.
The present invention provides a series of structures which can well overcome the technical problems of the prior art. In particular, the invention provides a lever member of a low voltage circuit breaker; a bottom cover correspondingly used; a transmission mechanism comprising the lever member; and a circuit breaker including the bottom cover and the transmission mechanism.
The lever component of the low-voltage circuit breaker has the following structure: the lever comprises a lever body, and a shaft connecting rod perforation, a spring mounting position and a limit position abutting surface which are arranged on the lever body; the lever body comprises a front surface and a back surface, and the shaft connecting rod through hole penetrates through the front surface and the back surface; the lever is characterized in that the limit position abutting surface is provided with an abutting surface embedded card convex or an abutting surface embedded card concave, the abutting surface embedded card convex or the abutting surface embedded card concave comprises a surface, and the surface comprises a part facing the direction of the front face of the lever body.
The bottom cover is provided with a leaning part for leaning against the extremely limited leaning surface, the leaning part comprises a leaning surface, and the leaning surface is provided with a leaning surface embedding card concave or a leaning surface embedding card convex matched with the leaning surface embedding card convex or the leaning surface embedding card concave; the bottom cover is also provided with an insertion hole and a spring limiting part.
The transmission mechanism comprises a lever component of any low-voltage type breaker.
In the case of a circuit breaker, the circuit breaker comprises the bottom cover and any transmission mechanism, and a shaft rod penetrating through the shaft rod through hole and penetrating into the insertion hole to shaft-connect the lever body with the bottom cover.
The shaft connecting rod penetrates through the shaft connecting rod through hole and is inserted into the insertion hole, so that the lever body is connected onto the bottom cover in a shaft mode, and the rotation axis of the lever body is the straight line where the shaft connecting rod is located. Since it penetrates the front and back surfaces of the lever body, one end is inserted into the insertion hole of the bottom cover, and the other end is matched with a top cover of the circuit breaker, and the bottom cover and the top cover can be buckled to form a shell of the circuit breaker.
The spring mounting location provides a mounting location for the energy storage spring on the lever body. One free end of the energy storage spring is fixed on the spring installation position, and the other free end acts on the spring limiting part of the bottom cover, so that the lever body and the bottom cover form an interaction relation by the energy storage spring. When the energy storage spring is designed, in order to enable the elastic force generated along the axis of the energy storage spring to exert good effect on the rotation motion of the lever body along the rotation axis, the elastic force axis of the energy storage spring avoids the straight line design of the perforation of the shaft connecting rod, namely the rotation axis. The elastic axis is the elastic axis of the energy storage spring.
When the limit abutment surface abuts against the abutment portion, the lever member is in a limit position, and the overall circuit breaker attains a limit state, i.e., an off-current state.
The back surface of the lever body faces one side of the bottom cover, and the front surface is one side away from the bottom cover. When assembled, the face facing by the operator is the front face, and the face gradually approaching the bottom cover is the back face.
The action between the limit abutting surface and the leaning part is directly realized through the mutual contact of the contact surfaces of the limit abutting surface and the leaning part. The contact surface of the limit abutting surface is an abutting surface embedded card convex or an abutting surface embedded card concave surface, and the contact surface of the leaning part is a leaning surface embedded card concave or a leaning surface embedded card convex surface on the leaning surface.
The abutting surface is embedded into the convex surface of the card or the abutting surface is embedded into the concave surface of the card, and the part facing the plane direction of the front surface is included, so that the reactive force applied to the limiting abutting surface by the abutting surface can decompose the force facing the negative direction of the z axis under the action of the resultant force, namely when the energy storage spring applies force.
The transmission mechanism is used for transmitting the position change of the handle caused by stress to the movable contact, so that the movable contact changes the space position of the movable contact. The above process necessarily involves a series of forces and conduction processes, and the parts associated with the lever member are also attributed thereto.
The design concept of the invention is as follows: the drive mechanism is provided with multiple points of fixation to enhance its stability in the xyz three-directional axis. Specifically, the transmission mechanism is axially connected with the bottom cover through the shaft connecting rod, so that the transmission mechanism is free in one direction on the z axis and is limited in rotation on the xy plane; due to the arrangement that the abutting surface is embedded into the clamping convex or the abutting surface is embedded into the clamping concave, the reaction force applied to the limiting position abutting surface by the abutting surface can decompose the force in the negative direction of the z axis, so that the transmission mechanism is limited on the z axis.
The assembly process is as follows:
tilting the transmission mechanism, aligning the energy storage spring with the spring limiting part of the bottom cover and approaching the energy storage spring;
secondly, after the energy storage spring is contacted with the spring limiting part, the positions of the shaft connecting rod and the inserting hole are aligned together and are pressed down to be inserted, and the energy storage spring is in a forced compression state;
and thirdly, releasing the energy storage spring after aligning the position of the transmission mechanism, wherein the abutting surface embedded card convex or the abutting surface embedded card concave arranged on the abutting surface of the limit position can be in contact fit with the leaning surface embedded card concave or the leaning surface embedded card convex arranged on the leaning surface.
The transmission mechanism is fixed together in the xy plane through the contact fit of the energy storage spring and the bottom cover, the contact fit of the limit position abutting surface and the leaning surface, and the abutting fit of the shaft connecting rod and the insertion hole; the transmission mechanism is fixed together at three points on the z axis by downward limit of the bottom of the insertion hole to the shaft connecting rod, upward limit of the opposite limit abutting surface of the leaning surface and z-axis static friction force caused by the energy storage spring abutting against the side wall of the bottom cover. By action resolution we know that all actions before reaching the limit abutment surface and the abutment surface are engaged, the force applied by manual hand holding is the complement of the resultant force or the tremor prevention to achieve the steady state requirement of giving the transmission mechanism on xyz three axes. Only after the limit position abutting surface and the leaning surface are matched, a human hand can be separated from the transmission mechanism, and the stable matching relation among the components is formed.
After the steady state is established, the disturbance force on the transmission mechanism in the z axis is far smaller than the other three forces on the z axis due to the unexpected vibration of the energy storage spring, so that the position fixing of the transmission mechanism cannot be influenced. In the z-axis direction, the condition that the displacement in the z-axis direction is limited only by the tightness between the shaft connecting rod and the insertion hole does not exist originally, so that the shallower matching relationship does not have great influence on the position stability of the transmission mechanism.
In addition, as the abutting surface embedded card convex or the abutting surface embedded card concave arranged on the limiting abutting surface and the leaning surface embedded card concave or the leaning surface embedded card convex arranged on the leaning surface can provide a certain visual reference point for an operator, the actual relative positions of the shaft connecting rod and the inserting hole can be more easily judged, and the operator can conveniently and rapidly assemble and cultivate a blind operation method with high accuracy.
The rotation axis is a z axis, and the front surface is positioned in the positive direction of the back surface on the z axis. The xy plane is perpendicular to the z axis.
Drawings
Fig. 1 is a schematic perspective view of an insertion hole.
Fig. 2 is a transverse cross-sectional view of the insertion hole.
Fig. 3 is a schematic perspective view of a lever member of one construction of the present invention.
Fig. 4 is a schematic perspective view of the lever member of fig. 3 from another perspective.
Fig. 5 is a schematic perspective view of a transmission mechanism including the lever member of fig. 3 according to the present invention.
Fig. 6 is a schematic perspective view of a low voltage circuit breaker including only the transmission mechanism of fig. 5, i.e., a perspective state view of a portion of the circuit breaker at the time of completion of installation.
Fig. 7 is a perspective view of the first step of installation.
Fig. 8 is a perspective view of the second step installation.
Fig. 9 is a perspective view of the third step installation.
Fig. 10 is a schematic diagram of the forces upon completion of the installation.
FIG. 11 is a simplified schematic view of a three-dimensional structure of one of the limit bit abutment surface and the abutment surface engagement.
FIG. 12 is a simplified schematic view of a three-dimensional structure of another of the limit bit abutment surface and abutment surface engagement.
Fig. 13 is a simplified schematic view of a three-dimensional structure of yet another configuration of the limit bit abutment surface and abutment surface engagement.
Fig. 14 is an exploded structural schematic view of the circuit breaker.
Wherein, the reference numerals are as follows:
1. a lever body;
2. a front face;
3. a back surface;
4. a side surface;
5. perforating the shaft connecting rod;
6. a spring mounting position;
7. an extremely limited abutting surface;
8. the abutting surface is embedded with a clamping convex;
9. a bottom cover;
10. a leaning part;
11. a resting surface;
12. the leaning surface is embedded into the card concave;
13. a surface;
14. an upward portion;
15. sliding into the inclined plane;
16. a transmission mechanism;
17. an energy storage spring;
18. a free end of the energy storage spring;
19. the other free end of the energy storage spring;
20. a spring limit part;
21. a shaft connecting rod;
22. an insertion hole;
23. a material reduction groove;
24. a reinforcing rib protrusion structure;
25. and a top cover.
Detailed Description
In order to make the reader better understand the design concept of the present invention, the following specific embodiments are provided so that the reader can visually understand the structure, the structure composition, the action principle and the technical effects related to the present invention. The content includes the structure, the matching relation, the static force direction, the forming mode and the result of the resultant force of each component.
It should be understood by the reader that the following examples are provided for analysis and understanding only, and the technical solution of the present invention is not limited thereto. After the reader has read the examples and understood the spirit of the invention, a series of modifications, equivalent substitutions, a mix of characteristic elements, etc. made according to the provided embodiments should be construed as being included in the spirit of the invention.
The reader should particularly note that the drawings corresponding to the specific embodiments exist in a form for assisting understanding, so that the reader can conveniently and fully understand the abstract upper concept of the technical idea related to the invention by understanding the specifically visualized lower concept. In the overall understanding of the present invention and in comparison with other technical solutions than those provided by the present invention, the representation of the drawings should not be taken as a sole reference basis, and after understanding the concept of the present invention, a series of modifications, equivalent substitutions, a mixture of characteristic elements, deletion and rearrangement of unnecessary technical characteristic elements, reasonable addition and rearrangement of unnecessary technical characteristic elements common in the prior art, and the like, which are made according to the drawings or not according to the drawings, should be understood to be included in the spirit of the present invention.
Since the technical solution of the present invention is not exhaustive, the following cases should also be understood as being included in the spirit of the present invention:
1. in the case where its structure utilizes substantially the same principle as the present technology, or achieves substantially the same function as the present technology, or obtains substantially the same advantageous effect as the present technology, its structure is deformed or its manner is a common means in the art or in a very similar technical field, and its structure is included in the spirit of the present invention.
2. The beneficial effects related to this embodiment are directed to the specific structural features in the illustrated embodiment, and the beneficial effects may be: lower position encompassed by the present teachings; it may also be new, i.e. necessarily obtained from a specific lower structure extended by an upper concept. The advantages of the present invention may be realized by the structure thereof, which is not or not fully corresponding to the above-described advantages of the embodiments or the advantages which are specifically pointed out in the spirit of the invention, but which may be reasonably derived from the design concept and spirit of the invention.
The lever component of the low-voltage circuit breaker with the structure, referring to fig. 3 and 4, the lever body 1 is provided with a front face 2, a back face 3 and a side face 4, a shaft connecting rod through hole 5 is formed in the lever body 1 in a mode of penetrating through the front face 2 and the back face 3, a spring mounting position 6 is arranged at the back face 3, a very limited abutting face 7 is arranged at the side face 4, an abutting face embedded clamping convex 8 is arranged on the very limited abutting face 7, referring to fig. 6 and 11, the bottom cover 9 comprises an abutting part 10, the abutting part 10 comprises an abutting face 11, an abutting face embedded clamping concave 12 is arranged on the abutting face 11, and when the assembly is completed and the assembly is in a breaking limit position, the abutting face embedded clamping convex 8 is embedded into the abutting face embedded clamping concave 12 to form a matching relationship, and the fixing function of a transmission mechanism 16 in a z-axis is achieved, and referring to fig. 5. The abutting surface embedded clamping convex 8 can be fixed on the extremely limited abutting surface 7 in a split mode, and the abutting surface embedded clamping convex 8 and the extremely limited abutting surface can also be of an integrated structure, and the abutting surface embedded clamping concave is the same as the abutting surface embedded clamping concave. Because of the upward portion 14 of the surface 13 of the abutment surface-engaging detent projection 8, it will be in a defined relationship with the downward portion of the surface 13 of the abutment surface-engaging detent recess 12, and when the actuator 16 is moving in the z-axis, the two opposing surfaces will exert a compressive force that will not actually move in the z-axis.
In this embodiment, the abutting surface embedded card convex 8 and the abutting surface embedded card concave 12 are in a tooth-shaped structure relationship, referring to fig. 3 and fig. 4, and in a specific design, the number of teeth may be single or multiple (referring to fig. 11); the arrangement mode can be single row, or multiple rows or staggered arrangement; in order to ensure a good fit of the tooth formation, a slide-in ramp 15 can be provided at the rim; the slide-in inclined surface 15 may be designed as a straight surface or may be designed as a curved surface. The tooth-shaped structure not only can be a positive tooth shape, but also can be a different tooth shape, such as a different tooth shape with a transverse section of H or O, and can also be embodied as a pin connection structure. The abutting surface embedded card convex 8 and the abutting surface embedded card concave 12 can form a complete matching relationship or can form a partial matching relationship, and only the abutting surface embedded card convex 8 and the abutting surface embedded card concave can form a facing relationship in the z-axis direction when being matched with each other. Further, we can know that other structures besides the tooth-shaped structure can realize the positioning relation on the z-axis as long as the above requirements can be met.
When assembled, as shown in fig. 7, the operator holds the transmission mechanism 16, at this time, the main body of the transmission mechanism 16 is in a state of tilting downward to the right, the energy storage spring 17 is positioned on the right side, and the limit position abutting surface 7 is positioned on the left side. The operator gradually brings the free end 19 of the energy storage spring 17 close to the spring stopper 20 of the bottom cover 9 in a left-up to right-down manner, and then touches and appropriately presses. Then, as shown in fig. 8, the operator can turn his head to looking up, and can also just refer to the relationship between the extreme limit abutting surface 7 and the leaning surface 11, or refer to the elastic hand feeling of the energy storage spring 17, so as to adjust the position of the transmission mechanism 16 to align the portion of the shaft connecting rod 21 located at the back surface 3 of the lever body 1 with the insertion hole 22 of the bottom cover 9, and gradually align the transmission mechanism 16 to insert the shaft connecting rod 21 into the insertion hole 22, at this time, the energy storage spring 17 is in a compressed state, so that a certain distance exists between the extreme limit abutting surface 7 and the leaning surface 11, as can be seen from fig. 9. When the position of the transmission mechanism 16 is adjusted to be in a completely flat state, the transmission mechanism 16 is slowly moved left to enable the compression elastic potential energy of the energy storage spring 17 to be slowly released to a certain extent, the final limit position abutting surface 7 contacts with the leaning surface 11, the abutting surface embedded clamping convex 8 and the leaning surface embedded clamping concave 12 form a matched relationship, and the assembly action is completed, and the state is shown in fig. 6. Providing a good operational premise for the later closing of the cap 25, see fig. 14.
After the assembly is completed, the operator can continue to fine-tune the position according to specific needs, and release various stresses generated during the assembly so as to maximize the degree of engagement between the transmission mechanism 16 and the bottom cover 9.
The circuit breaker provided in this embodiment includes the bottom cover 9 and the transmission mechanism 16.
For the analysis of forces during and upon completion of the assembly described above, reference is made to fig. 10. When the energy storage spring 17 contacts the spring limit part 20 of the bottom cover 9, compression elastic potential energy E is generated p With the relative positions of the shaft connecting rod 21 and the insertion hole 22 and the gradual flattening of the transmission mechanism 16, the elastic force F of the energy storage spring 17 X-shaped bullet The direction gradually goes toward the vertical z-axis and eventually toward the negative x-axis direction. The bottom of the insertion hole 22 can apply a reaction force F in the positive direction of the z-axis to the shaft rod 21 Positive z So that the lever component cannot move downwards continuously; the bearing surface insert pocket 12 can be formed by applying a reaction force F in the negative z-axis direction to the bearing surface insert pocket protrusion 8 Negative z So that the lever component cannot move upwards; the bearing surface insert pocket 12 will also exert a positive x-axis force F on the bearing surface insert pocket protrusion 8 x is positive To counteract the spring force F of the energy-storing spring 17 X-shaped bullet In order to be able to obtain the most stable force cancellation in the x-axis, the following design can be used: the limit abutting surface 7 is positioned on the elastic force F of the energy storage spring 17 X-shaped bullet On the axis. Positioning on the y-axis is obtained by abutment of the shaft rod 21 against the insertion hole 22 y is positive 、F Negative y To be maintained. It should be noted that the elastic axis of the energy storage spring 17 does not pass through the rotation axis, so as to ensure that the applied force can have a good direct effect on the rotation of the lever body 1.
This embodiment may be further derived:
1. the limit abutting surface 7 is provided with a clamping concave which is embedded into the abutting surface instead of the abutting surface embedded into the clamping convex 8; the leaning surface 11 is not a leaning surface embedded card concave 12, but a leaning surface embedded card convex matched with the leaning surface embedded card concave.
2. A material reducing groove 23 is arranged on the front surface 2 and/or the back surface 3 of the lever body 1, wherein fig. 3 is a structure with grooves on the front surface. Thereby achieving the following three effects: [1] the material consumption is reduced; [2] the thickness is reduced; [3] forming the reinforcing rib protrusion structure 24. Aiming at [1], less materials are used for reducing the material investment, so that the weight and the cost of the part are reduced, and the method has great significance in actual production; the volume of the parts is small, but the production quantity is usually very large, so that the macroscopic cost saving is obvious. For [2], the reduction in thickness not only helps to achieve a more stable dimension, but also reduces warpage and internal stress during injection molding, since the cooling rates of the upper and lower surfaces are more uniform. For [3], when the number of the material reducing grooves 23 is plural, it can be designed that the reinforcing rib protruding structures 24 are formed between the plural material reducing grooves 23, thereby effectively improving the structural strength or optimizing the conduction of force.
3. The position of the spring mounting position 6 can be changed appropriately, and only the following steps are needed: the energy storage spring 17 is installed, and the elastic force applied by the energy storage spring can be decomposed into tangential directions along the rotation circumference of the transmission mechanism 16.
4. The abutment surface insert pocket 8 is designed as an inclined surface structure facing obliquely upwards, and referring to fig. 12, the abutment surface insert pocket 12 includes an inclined surface structure facing obliquely downwards. In this embodiment, the inclination of the contact surface into the recess 12 is important. The larger the inclination angle is relative to the z-axis, the better the limit effect in the z-axis direction is. However, because the volume of the leaning portion 10 is small, the inclined surface is short due to the overlarge angle, the perfect fit position of the surface is not easy to find, and meanwhile, the injection molding difficulty is improved, and the production cost is increased. Thus, in a specific design, the angle of inclination should be ensured between 1 ° and 60 °, preferably between 1 ° and 30 °, more preferably between 3 ° and 8 °, most preferably 5 °. Referring to fig. 13, in order to ensure consistency when the abutment surface insert card convex 8 and the abutment surface insert card concave 12 are mated with each other, they may be designed in a smoothly curved structure. By the design, the surface and the surface can easily obtain a perfect fit state, namely, the abutting surface embedded clamping convex 8 and the leaning surface embedded clamping concave 12 can easily slide into and spontaneously form a perfect fit relationship by means of the elasticity of the energy storage spring 17. However, the smooth curved surface structure also has the defect of insufficient limiting force on the z axis, so that a larger arc contact part area of two sides and a deeper embedding depth are main design concepts in design. In addition, the arc-shaped parts of the curved surface are all good in inferior arc or inferior circle, so that the two sides can be completely contacted.
Since the lever parts are rotated about the shaft rod 21, each part moves on a circular arc line when the two limit positions are changed. Because one free end 18 of the energy storage spring 17 is fixed on the lever body 1 and moves along with the arc line; while the other free end 19 is fixed to the spring stopper 20 of the bottom cover 9 without moving. It is therefore necessary to create a lateral deflection in the xy-plane, and when it deflects, a tendency to rebound due to the resilience created, which if excessive, can lead to instability of the operation of the whole transmission member, adversely affecting the energy storage spring 17 itself, as well as the two free ends of the energy storage spring 17. In the present embodiment, therefore, the maximum lateral offset angle of the charge spring 17 is set to 14 ° or less.
The lever component is made of various materials, and thermoplastic plastics are generally selected for facilitating one-step injection molding. Specifically, polyamide plastics such as general nylon or high-temperature nylon plastics, specifically PA6, PA66, PA46, PPA and the like can be selected; polyphenylene sulfide plastic can also be selected; meanwhile, polyester plastics such as PBT plastic, PET plastic and the like can also be selected. Preferred materials are PBT plastic and PET plastic.
Actual specific verification test:
test one
Participation test personnel: 10 skilled workers (the time of the operation is more than or equal to 1 year, and the total assembly of the complete circuit breaker is more than or equal to 10 ten thousand).
Test sample: bottom cover, drive mechanism, top cap.
Test amount: 30 ten thousand groups.
Single person assembly speed: 6 groups per minute.
Test group: a is a structure in the prior art (smooth plane contact between a limit position abutting surface and a leaning surface), B is a structure in the patent (the abutting surface embedded clamping convex (8) is an inclined surface structure which is inclined upwards, and the slope is 5 degrees).
Results:
test II
Participation test personnel: 10 skilled workers (the time of the operation is more than or equal to 1 year, and the total assembly of the complete circuit breaker is more than or equal to 10 ten thousand).
Test sample: bottom cover, drive mechanism, top cap.
Test time: and 5 hours.
Counting criteria: successful.
Test group: a is a structure in the prior art (smooth plane contact between a limit position abutting surface and a leaning surface), B is a structure in the patent (the abutting surface embedded clamping convex (8) is an inclined surface structure which is inclined upwards, and the slope is 5 degrees).
Results:
Claims (10)
1. the low-voltage circuit breaker comprises a lever component and a bottom cover, wherein the lever component comprises a lever body (1), and a shaft connecting rod through hole (5), a spring mounting position (6) and a limit position abutting surface (7) which are arranged on the lever body (1); the lever body (1) comprises a front surface (2) and a back surface (3), and the shaft connecting rod perforation (5) penetrates through the front surface (2) and the back surface (3); the lever is characterized in that the limit position abutting surface (7) is provided with an abutting surface embedded card convex (8) or an abutting surface embedded card concave, the abutting surface embedded card convex (8) or the abutting surface embedded card concave comprises a surface (13), and the surface (13) comprises a part facing the direction of the front surface (2) of the lever body (1); the bottom cover is provided with a leaning part (10) for leaning against the limit position leaning against surface (7), the leaning part (10) comprises a leaning surface (11), and a leaning surface embedding card concave (12) or a leaning surface embedding card convex matched with the leaning surface embedding card convex (8) or the leaning surface embedding card concave are arranged on the leaning surface (11).
2. Low voltage circuit breaker according to claim 1, characterized in that the abutment surface is embedded in a detent (8) or in a tooth-like structure.
3. The low-voltage circuit breaker according to claim 1, characterized in that the abutment surface is embedded in the detent projection (8) or in the abutment surface is embedded in the detent recess in a beveled-up configuration.
4. The low-voltage circuit breaker according to claim 1, characterized in that the abutment surface insert detent (8) or abutment surface insert detent is of smoothly curved configuration.
5. Low-voltage circuit breaker according to claim 1, characterized in that a blanking recess (23) is provided on the front face (2) and/or the rear face (3) of the lever body (1).
6. The low voltage circuit breaker according to claim 5, characterized in that the number of said relief grooves (23) is plural, and that a rib protrusion structure (24) is formed between plural of said relief grooves (23).
7. The low voltage circuit breaker according to claim 1, characterized in that the bottom cover (9) is further provided with an insertion hole (22) and a spring stopper (20).
8. The low voltage circuit breaker according to claim 7, characterized in that an energy storage spring (17) is mounted at the spring mounting location (6), the spring axis of the energy storage spring (17) not passing through the line of the shaft rod penetration (5).
9. Low-voltage circuit breaker according to claim 8, characterized in that the limit stop abutment surface (7) is located on the elastic axis of the energy storage spring (17).
10. The low voltage circuit breaker according to any of claims 1 to 9, characterized in that the lever member is made of thermoplastic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810731227.1A CN108777245B (en) | 2018-07-05 | 2018-07-05 | Lever component, bottom cover, transmission mechanism and circuit breaker of low-voltage circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810731227.1A CN108777245B (en) | 2018-07-05 | 2018-07-05 | Lever component, bottom cover, transmission mechanism and circuit breaker of low-voltage circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108777245A CN108777245A (en) | 2018-11-09 |
| CN108777245B true CN108777245B (en) | 2023-05-30 |
Family
ID=64031084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810731227.1A Active CN108777245B (en) | 2018-07-05 | 2018-07-05 | Lever component, bottom cover, transmission mechanism and circuit breaker of low-voltage circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108777245B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208655547U (en) * | 2018-07-05 | 2019-03-26 | 杭州本松新材料技术股份有限公司 | Lever part, transmission mechanism and the breaker of low-pressure type breaker |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2687249B1 (en) * | 1992-02-07 | 1994-04-01 | Merlin Gerin | CONTROL MECHANISM OF A MOLDED BOX CIRCUIT BREAKER. |
| CN203631449U (en) * | 2013-12-26 | 2014-06-04 | 二一三电器(上海)有限公司 | Operating mechanism of miniature circuit breaker |
| CN203967000U (en) * | 2014-08-04 | 2014-11-26 | 浙江人民电器有限公司 | Miniature circuit breaker |
| CN106531579B (en) * | 2015-09-11 | 2019-10-22 | 浙江正泰电器股份有限公司 | The actuating mechanism of residual current action breaker |
| CN206441682U (en) * | 2017-01-03 | 2017-08-25 | 浙江正泰电器股份有限公司 | Miniature circuit breaker |
| CN206877923U (en) * | 2017-05-11 | 2018-01-12 | 浙江正泰电器股份有限公司 | The assembly equipment of breaker lever assembly |
-
2018
- 2018-07-05 CN CN201810731227.1A patent/CN108777245B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208655547U (en) * | 2018-07-05 | 2019-03-26 | 杭州本松新材料技术股份有限公司 | Lever part, transmission mechanism and the breaker of low-pressure type breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108777245A (en) | 2018-11-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1108003C (en) | Connector | |
| CN104520074B (en) | Electrical equipment, battery pack and electric device | |
| US11885361B2 (en) | Connector | |
| WO2005097423B1 (en) | Upper bumper configuration for a power tool | |
| EP1311028A3 (en) | Connector for flat flexible cable | |
| GB2082245A (en) | Angle or ball joint | |
| CN110268496B (en) | Switch with a switch body | |
| CN108777245B (en) | Lever component, bottom cover, transmission mechanism and circuit breaker of low-voltage circuit breaker | |
| US6929491B1 (en) | Card connector | |
| CN108711540B (en) | Lever component, bottom cover, transmission mechanism and circuit breaker of low-voltage circuit breaker | |
| CN210575627U (en) | Clamping device of miniature light-touch switch assembling equipment | |
| CN208655547U (en) | Lever part, transmission mechanism and the breaker of low-pressure type breaker | |
| CN208706554U (en) | Lever part, bottom cover, transmission mechanism and the breaker of low-pressure type breaker | |
| US6471536B1 (en) | Zero Insertion Force socket having mechanical fastening device | |
| CN206245898U (en) | A kind of U-shaped coded lock | |
| CN109631296B (en) | Split air conditioner and panel fixing structure thereof | |
| CN208555661U (en) | Formed punch locking member and punching equipment comprising it | |
| CN211654888U (en) | Battery pack | |
| CN105552668B (en) | Two flat translational pins | |
| CN2245276Y (en) | Card-returning structure with safety protective effect | |
| CN220192938U (en) | Buckle formula round brush and cleaning machines people | |
| CN210760167U (en) | Automobile air conditioner air outlet blade adjusting device | |
| CN219228035U (en) | Control box and electronic equipment | |
| CN214706313U (en) | WTB connector | |
| TWI729833B (en) | Push-type switch structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |