CN213905245U

CN213905245U - Thermomagnetic adjustable structure and control and protection switching device

Info

Publication number: CN213905245U
Application number: CN202120234725.2U
Authority: CN
Inventors: 朱奇敏; 翁金藏; 屠瑜权; 屠旭慰; 王林
Original assignee: Zhejiang Jonk Technology Co ltd
Current assignee: Zhejiang Jonk Technology Co ltd
Priority date: 2021-01-27
Filing date: 2021-01-27
Publication date: 2021-08-06
Anticipated expiration: 2031-01-27

Abstract

The utility model provides a pair of thermomagnetic adjustable structure and control and protection switch electrical apparatus belongs to low-voltage apparatus technical field, and thermomagnetic adjustable structure includes: a bimetal; a transmission structure; the rocker arm is rotatably arranged on the bracket; the rocker arm is matched with the transmission structure to transmit a tripping signal to the control protector; the adjusting component is arranged on the bracket; the adjusting assembly is connected with the rocker arm and drives the rocker arm to move so as to change the positions of the rocker arm and the transmission structure; the utility model discloses a thermomagnetic adjustable structure can compensate the different displacement value that causes the product by multiple comprehensive factor at any time, and fundamentally has optimized the characteristic parameter of the check-up of thermomagnetic module, has improved the efficiency of check-up greatly, has improved the first production efficiency of product, has reduced manufacturing cost.

Description

Thermomagnetic adjustable structure and control and protection switching device

Technical Field

The utility model relates to a low-voltage apparatus technical field, concretely relates to thermomagnetic adjustable structure and control and protection switch electrical apparatus.

Background

The thermomagnetic module is an important element for controlling and protecting a switching device, and the working principle is as follows: when the actual three-phase working current of the main circuit load exceeds 1.05 times of the set value, the slender bimetallic element contained in the conductor of the main circuit load expands and bends under the action of heat, the non-fixed end displaces by a certain numerical value, and the driving force generated by the displacement pushes the transmission mechanism to perform a series of actions, so that the control and protection switch electrical appliance is tripped, the main power supply is cut off, and the load is reliably protected.

In actual production, due to various interrelated reasons of errors of the machined sizes of parts, deviation of the actual current of the main circuit and deviation of the resistance value of the heating element, the preset displacement has a certain difference compared with the actually required displacement under the influence of the comprehensive factors, and rework verification is needed again.

In the verification process of the thermomagnetic module, the bimetallic strip needs to be cooled to room temperature gradually, the displacement value is reset, and the verification process is carried out again, wherein the verification process needs about 12 hours and sometimes needs to be carried out 3-4 times, so that the production efficiency is greatly reduced, and the production cost is improved.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the check-up process at thermomagnetic module among the prior art, at first need cool off to the room temperature gradually to bimetallic strip, reset this displacement value to carry out the check-up process again, and this check-up process needs 12 hours about, sometimes, needs the check-up 3-4 times, the very big reduction of this kind of mode production efficiency, has improved manufacturing cost's defect to a thermomagnetic adjustable structure is provided.

The utility model also provides a control and protection switch electrical apparatus.

In order to solve the above technical problem, the utility model provides a pair of thermomagnetic adjustable structure, include:

one end of the bimetallic strip is connected with a three-phase circuit of a power supply in series, and the other end of the bimetallic strip deforms and displaces due to temperature change;

the transmission structure is connected with the bimetallic strip and moves under the driving of the deformation displacement of the bimetallic strip;

the rocker arm is rotatably arranged on the bracket; the rocker arm is matched with the transmission structure to transmit a tripping signal to the control protector;

the adjusting component is arranged on the bracket; the adjusting component is connected with the rocker arm and drives the rocker arm to move so as to change the positions of the rocker arm and the transmission structure.

Preferably, the transmission structure includes:

the guide plate is provided with a guide hole in a molding manner; one end of the bimetallic strip is inserted into the guide hole.

As the preferred scheme, the one end of rocking arm is connected and drives rocking arm pivoted receiving part under the promotion of baffle with the baffle, and the other end is the output part with control protector complex, and the middle part is through pivot and the connecting portion of support swivelling joint.

Preferably, the method further comprises the following steps: the elastic piece is arranged on the bracket; the elastic piece has the drive power that drives the rocking arm rotation and reset.

Preferably, the adjusting assembly comprises:

one end of the first supporting piece is fixedly connected with the connecting part of the rocker arm, and the other end of the first supporting piece is rotatably sleeved on the rotating shaft;

one end of the second supporting piece is rotatably sleeved on the rotating shaft, and the other end of the second supporting piece is provided with a protruding abutting end which is used for abutting against the cam; the second supporting piece is also provided with an abutting surface facing the first supporting piece;

an adjusting member disposed between the first supporting member and the second supporting member; the adjusting piece drives the first supporting piece to move circumferentially by taking the rotating shaft as a center.

Preferably, the adjusting piece is an adjusting screw rod; the first supporting piece is provided with a threaded hole; the adjusting screw rod is in threaded connection with the threaded hole of the first supporting piece, and the end part of the adjusting screw rod is abutted to the abutting surface of the second supporting piece.

Preferably, the elastic member is a torsion spring, the torsion spring is sleeved on the rotating shaft, one end of the torsion spring is abutted with the first supporting member, and the other end of the torsion spring is abutted with the cam.

Preferably, the transmission structure further includes:

and the push plate is arranged at the position where the guide plate is matched with the receiving part of the rocker arm.

The utility model also provides a control and protection switch electrical apparatus, including above-mentioned arbitrary thermomagnetic adjustable structure.

The utility model discloses technical scheme has following advantage:

1. the utility model provides a thermomagnetic adjustable structure, include: the device comprises a bimetallic strip, a transmission structure, a rocker arm and an adjusting component; when any one item of the check module of the thermomagnetic module is unqualified, the bimetallic strip does not need to be adjusted, namely, the thermomagnetic module does not need to be returned to an initial state (or cooled to room temperature), the rocker arm can be directly driven to move through the arrangement of the adjusting assembly and adjusted to a proper position, and the tripping action can be smoothly realized;

the adjusting component can compensate different displacement values caused by various comprehensive factors to the product at any time, fundamentally optimizes the characteristic parameters of the verification of the thermomagnetic module, greatly improves the verification efficiency, improves the first production efficiency of the product and reduces the production cost.

2. The utility model provides a thermomagnetic adjustable structure, the adjusting part includes: a first support member, a second support member and an adjustment member; the adjusting piece is an adjusting screw rod; in the adjusting process, only the adjusting screw rod needs to be adjusted, so that the first supporting piece and the second supporting piece are separated or gathered to form a motion track, the rocker arm is driven to move, and the verification is completed.

3. The utility model provides a control and protection switch electrical apparatus, including above-mentioned thermomagnetic adjustable structure, consequently have above-mentioned arbitrary advantage.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of the thermo-magnetic adjustable structure of the present invention.

Fig. 2 is a schematic view of a first angular perspective structure of the adjustment assembly shown in fig. 1.

Fig. 3 is a top view of a partial structure of the thermo-magnetic adjustable structure of the present invention.

FIG. 4 is a second angular perspective view of the adjustment assembly shown in FIG. 1.

Fig. 5 is a schematic view of a relationship structure between the abutting end of the second supporting member and the cam according to the present invention.

Description of reference numerals:

1. a bimetal; 2. a guide plate; 3. pushing the plate; 4. a rocker arm; 5. a first support member; 6. a second support member; 7. adjusting the screw rod; 8. a rotating shaft; 9. a support; 10. a cam; 11. a butting end; 12. fixing the screw rod; 13. a receiving section; 14. an output section; 15. a connecting portion.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Example 1

The thermomagnetic adjustable structure that this embodiment provided includes: the double-metal sheet 1, the guide plate 2, the rocker arm 4 and the adjusting component; when any one item of the check module of the thermomagnetic module is unqualified, the bimetallic strip 1 does not need to be adjusted, namely the thermomagnetic module does not need to be returned to an initial state (cooling to room temperature is not needed), the rocker arm 4 can be directly driven to move through the arrangement of the adjusting assembly and adjusted to a proper position, and the tripping action can be smoothly realized; the adjusting component can compensate different displacement values caused by various comprehensive factors to the product at any time, fundamentally optimizes the characteristic parameters of the verification of the thermomagnetic module, greatly improves the verification efficiency, improves the first production efficiency of the product and reduces the production cost.

As shown in fig. 1, one end of the bimetallic strip 1 is a fixed end connected in series with a three-phase power line, and the other end is a free end inserted into a guide hole of the guide plate 2, and the guide hole is formed on the guide plate 2; the bimetallic strip 1 is tightly attached together through a special process, two metals with different expansion coefficients are adopted, when the overload current in the circuit is a certain multiple of the rated current, the bimetallic strip 1 can generate heat and expand and bend, so that the free end generates deformation displacement with a certain numerical value, and the deformation displacement generates a driving force to drive the guide plate 2 to perform a series of actions;

the other end of the guide plate 2 is provided with a push plate 3, and one end of the push plate 3 is connected with a rocker arm 4; the rocker arm 4 is rotatably arranged on the bracket 9;

as shown in fig. 2, the swing arm 4 is provided in an arc shape, having a receiving portion 13, an output portion 14, and a connecting portion 15; the receiving part 13 is connected with the push plate 3, the rocker arm 4 is driven to rotate by the push plate 3, the output part 14 is matched with the control protector, and the connecting part 15 is fixedly connected with one end of the first supporting part 5 through a fixing screw 12; the other end of the first supporting piece 5 is sleeved on the rotating shaft 8 and is rotatably connected with the rotating shaft 8;

as shown in fig. 3, a torsion spring (not shown) is further disposed on the rotating shaft 8, and one end of the torsion spring abuts against the first support member 5; when the push plate 3 pushes the rocker arm 4 to the right (as shown by an arrow), the rocker arm 4 is connected with the first supporting piece 5, so that the first supporting piece 5 and the rocker arm 4 rotate anticlockwise (as shown by a curved arrow), the control protector is tripped, a main circuit is cut off, and reliable protection is realized on a load; when the swing arm returns to normal, the first supporting piece 5 is driven to rotate by the driving force of the torsion spring, so that the swing arm 4 is driven to rotate, and the swing arm 4 is reset.

As shown in fig. 4, the rotating shaft 8 is further sleeved with a second supporting member 6, and the second supporting member 6 has an abutting end 11 which extends toward the cam 10 and abuts against the cam 10, and also has an abutting surface which is disposed toward the first supporting member 5; a threaded hole is formed in the first support 5, an adjusting screw 7 is connected to the threaded hole in a threaded manner, and the end of the adjusting screw 7 abuts against the abutting surface of the second support 6;

as shown in fig. 5, when the adjusting screw 7 is screwed in the direction of the second support member 6, since the end of the adjusting screw 7 abuts against the abutting surface of the second support member 6, the first support member 5 moves counterclockwise around the rotating shaft 8, that is, the distance between the ends of the first support member 5 and the second support member 6 away from the rotating shaft 8 increases, and the first support member 5 moves while driving the position of the rocker arm 4 to move;

when the adjusting screw 7 is screwed in a direction away from the second support member, since the torsion spring has a driving force that drives the first support member 5 clockwise around the rotating shaft 8, the first support member 5 will move clockwise around the rotating shaft 8, that is, the distance between the ends of the first support member 5 and the second support member 6 away from the rotating shaft 8 will become smaller, and the first support member 5 will move while driving the position of the rocker arm 4 to move;

through the removal of above-mentioned adjusting screw 7, realize the removal of rocking arm 4 position, under the comprehensive factor, the deformation displacement of bimetal, when can not accurately drive rocking arm 4 drive control protector and trip, adjusting screw 7 for rocking arm 4 removes, can directly under the condition of this deformation displacement, makes rocking arm 4 can drive control protector and trip smoothly.

Method of use and principles

The working principle of the overload protection characteristic of the thermomagnetic module is that when the actual three-phase working current of the load of the main circuit exceeds 1.05 times of a set value, the bimetallic element expands and bends under heat, the free end generates deformation displacement with a certain numerical value, and the pushing force generated by the deformation displacement pushes the guide plate 2, the push plate 3, the rocker arm 4 and other parts to perform a series of actions, so that the control protector is tripped to cut off the main circuit, and the load is reliably protected;

when the device is used, cold synchronization debugging is firstly carried out, the bimetallic strip 1 and other parts are adjusted, and the drive structure can reliably simulate tripping under the same stroke distance (the stroke distance is simulated by a special clamp). The method can enter a power-on debugging stage, the main loop judges whether each related item is qualified or not according to the requirement of GB/T14048.9 by a specified current value, and when any one item specified by the flow is unqualified, the thermomagnetic modules of the batch need to be further adjusted; at this time, the adjusting screw 7 is adjusted so that the first supporting member 5 and the second supporting member 6 make a movement locus of being separated or gathered. The mode can directly adjust the thermomagnetic module without returning the thermomagnetic module to an initial state, thereby fundamentally optimizing the characteristic parameters of the thermomagnetic module and greatly improving the production efficiency of verification.

Example 2

The control and protection switching device provided by the embodiment comprises the thermomagnetic adjustable structure described in the embodiment 1; the control and protection switch electric appliance can be an electric appliance such as a circuit breaker.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims

1. A thermomagnetic adjustable structure, comprising:

one end of the bimetallic strip (1) is connected with a three-phase circuit of a power supply in series, and the other end of the bimetallic strip deforms and displaces due to temperature change;

the transmission structure is connected with the bimetallic strip (1) and moves under the driving of the deformation displacement of the bimetallic strip (1);

the rocker arm (4) is rotatably arranged on the bracket (9); the rocker arm (4) is matched with the transmission structure to transmit a tripping signal to the control protector;

the adjusting component is arranged on the bracket (9); the adjusting component is connected with the rocker arm (4) and drives the rocker arm (4) to move so as to change the positions of the rocker arm (4) and the transmission structure.

2. A thermomagnetic adjustable structure according to claim 1, wherein the transmission structure comprises:

the guide plate (2) is provided with a guide hole in a molding manner; one end of the bimetallic strip (1) is inserted into the guide hole.

3. A thermomagnetic adjustable structure according to claim 2, wherein one end of the rocker arm (4) is a receiving part (13) which is connected with the guide plate (2) and drives the rocker arm (4) to rotate under the pushing of the guide plate (2), the other end is an output part (14) which is matched with the control protector, and the middle part is a connecting part (15) which is rotatably connected with the bracket (9) through the rotating shaft (8).

4. A thermomagnetic adjustable structure according to claim 3, further comprising: the elastic piece is arranged on the bracket (9); the elastic piece has a driving force for driving the rocker arm (4) to rotate and reset.

5. A thermomagnetic adjustable structure according to claim 4, wherein the adjustment assembly comprises:

one end of the first supporting piece (5) is fixedly connected with the connecting part (15) of the rocker arm (4), and the other end of the first supporting piece is rotatably sleeved on the rotating shaft (8);

one end of the second supporting piece (6) is rotatably sleeved on the rotating shaft (8), and the other end of the second supporting piece is provided with a protruding abutting end (11) which is used for abutting against the cam (10); the second supporting piece (6) is also provided with an abutting surface facing the first supporting piece (5);

an adjustment member provided between the first support member (5) and the second support member (6); the adjusting piece drives the first supporting piece to move circumferentially by taking the rotating shaft (8) as a center.

6. Thermomagnetic adjustable structure according to claim 5, characterized in that the adjustment member is an adjustment screw (7); the first supporting piece (5) is provided with a threaded hole; the adjusting screw rod (7) is in threaded connection with a threaded hole of the first supporting piece (5), and the end part of the adjusting screw rod is abutted against the abutting surface of the second supporting piece (6).

7. A thermomagnetic adjustable structure according to claim 6, wherein the elastic member is a torsion spring, the torsion spring is sleeved on the rotating shaft (8), one end of the torsion spring abuts against the first supporting member (5), and the other end of the torsion spring abuts against the cam (10).

8. A thermomagnetic adjustable structure according to claim 2, wherein the transmission structure further comprises:

a push plate (3) provided at a position where the guide plate (2) is fitted with the receiving portion (13) of the rocker arm (4).

9. Control and protection switching device, characterized in that it comprises a thermomagnetic adjustable structure according to any one of claims 1 to 8.