Operating mechanism and circuit breaker

Abstract

The utility model provides an operating mechanism and a circuit breaker, and relates to the technical field of low-voltage electrical appliances, the operating mechanism comprises an operating mechanism, a mechanism seat and a supporting plate, a first shaft is arranged on the mechanism seat, the mechanism seat is driven to rotate around the first shaft, the supporting plate is rotatably connected with the mechanism seat through a second shaft, the first shaft penetrates through the supporting plate, and the supporting plate is further connected with a moving contact. And an elastic piece is arranged between the first shaft and the moving contact and is used for providing contact pressure close to the static contact for the moving contact when the moving contact is in contact with the static contact. According to the operating mechanism and the circuit breaker provided by the invention, the problem of complex structure of a mechanism seat in the prior art is solved.

Description

Technical Field

[0001] The present application relates to the technical field of low-voltage electrical appliances, and in particular to an operating mechanism and a circuit breaker. Background Art

[0002] A circuit breaker is a switching device capable of closing, carrying, and interrupting current under normal circuit conditions, and closing, carrying, and interrupting current under abnormal circuit conditions within a specified timeframe. Circuit breakers are categorized by their scope of use as high-voltage and low-voltage circuit breakers. Low-voltage circuit breakers, also known as automatic switches or air switches, function as both manual switches and automatic protection against loss of voltage, undervoltage, overload, and short circuits. They are used to distribute electrical energy, infrequently start asynchronous motors, and protect power lines and motors.

[0003] The circuit breaker includes a handle, an operating mechanism in transmission connection with the handle, and a movable contact connected to the operating mechanism. The handle drives the movable contact through the operating mechanism, causing it to engage or disengage with the stationary contact to close or open the circuit breaker. Specifically, the operating mechanism includes a mechanism base and a tripping member disposed on the mechanism base. The mechanism base is driven to rotate about a rotating shaft, and the movable contact is rotationally connected to the mechanism base. The rotating shaft is movably connected, meaning that the rotating shaft of the mechanism base is coaxial with the rotation center of the movable contact. To provide contact pressure for the movable contact, a tension spring is disposed between the movable contact and the mechanism base. The fixing structure and operation mode of the tension spring make the structure of the mechanism base complex. Utility Model Content

[0004] The purpose of this application is to provide an operating mechanism and a circuit breaker to address the above-mentioned deficiencies in the prior art, so as to solve the problem of complex structure of the mechanism base in the prior art.

[0005] To achieve the above objectives, the technical solutions adopted in the embodiments of the present application are as follows:

[0006] In one aspect of an embodiment of the present application, an operating mechanism, a mechanism seat and a support plate are provided, wherein a first axis is provided on the mechanism seat, and the mechanism seat is driven to rotate around the first axis, the support plate is rotatably connected to the mechanism seat through a second axis, and the first axis passes through the support plate, and a moving contact is also connected to the support plate, and an elastic member is provided between the first axis and the moving contact, and the elastic member is used to provide contact pressure for the moving contact close to the static contact when the moving contact contacts the static contact.

[0007] As an practicable manner, a third axis is connected to one side of the support plate close to the moving contact, and the elastic member is arranged between the first axis and the third axis, wherein the first axis, the second axis and the third axis are not coplanar.

[0008] As an implementable manner, a strip groove is provided on the support plate, and the first shaft passes through the strip groove, so that one end of the support plate is movably connected to the mechanism seat.

[0009] As an implementable method, the mechanism seat is driven to rotate to bring the moving contact into contact with the static contact, and after contact, the first shaft moves in the strip groove to make one end of the support plate move relative to the first shaft, and the other end of the support plate rotates around the second shaft to make the moving contact and the static contact move relative to each other until the circuit breaker is closed.

[0010] As an implementable method, a mounting portion is provided on one side of the support plate close to the moving contact, and the moving contact is riveted to the mounting portion so that the moving contact can rotate relative to the mounting portion. The moving contact includes two contacts arranged opposite to each other and a connecting portion connecting the two contacts, and the connecting portion is connected to the mounting portion.

[0011] As an practicable manner, the mounting portion includes a boss extending out of the support plate, and the connecting portion is connected to the boss.

[0012] As an implementable manner, a baffle is further connected to the end of the support plate, and the baffle is arranged on the side of the moving contact away from the static contact to limit the position of the moving contact after the moving contact contacts the static contact.

[0013] As an implementable manner, the elastic member is a tension spring, the mechanism seat includes relatively arranged mounting plates, the first axis passes through the mounting plates on both sides, and the elastic member and the support plate are both located between the two mounting plates.

[0014] As an implementable method, the mounting plates on both sides are connected by a connecting plate, and a first abutment portion and a second abutment portion are provided on the side of the support plate close to the connecting plate. The first abutment portion is used to abut and limit the end face of the connecting plate during the rotation process, and the second abutment portion is used to abut against the quick-connect part during the rotation process.

[0015] Another aspect of the embodiments of the present application provides a circuit breaker including the above-mentioned operating mechanism.

[0016] The beneficial effects of this application include:

[0017] The present application provides an operating mechanism, a mechanism seat and a support plate, a first axis is provided on the mechanism seat, and the mechanism seat is driven to rotate around the first axis, the support plate is rotatably connected to the mechanism seat through the second axis, and the first axis passes through the support plate, so that the rotation centers of the support plate and the mechanism seat are not coaxial, and the support plate is also connected to a moving contact, so that the moving contact and the support plate rotate synchronously, an elastic member is provided between the first axis and the moving contact, the elastic member is used to provide the moving contact with the static contact when the moving contact contacts the static contact, so as to achieve stable contact between the moving contact and the static contact, and the elastic member is provided between the first axis and the moving contact, which can simplify the structure of the operating mechanism while providing contact pressure for the moving contact. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A schematic diagram of the structure of an operating mechanism provided in an embodiment of the present application;

[0020] Figure 2 This is one of the state diagrams of an operating mechanism provided in an embodiment of the present application;

[0021] Figure 3 This is a second state diagram of an operating mechanism provided in an embodiment of the present application;

[0022] Figure 4 This is a third state diagram of an operating mechanism provided in an embodiment of the present application;

[0023] Figure 5 An exploded schematic diagram of a support plate and a moving contact provided in an embodiment of the present application;

[0024] Figure 6 A schematic diagram of the connection between a support plate and a moving contact provided in an embodiment of the present application.

[0025] Icon: 100-operating mechanism; 110-mechanism seat; 120-support plate; 121-strip groove; 122-mounting part; 123-baffle; 124-first abutting part; 125-second abutting part; 131-first axis; 132-second axis; 133-third axis; 140-elastic member; 150-moving contact; 151-contact point; 152-connecting part; 210-static contact; 220-quick closing member. DETAILED DESCRIPTION

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application as claimed, but merely represents selected embodiments of the present application. It should be noted that, unless there is a conflict, the various features of the embodiments of the present application may be combined with each other, and the combined embodiments are still within the scope of protection of the present application.

[0028] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0029] In one aspect of the embodiment of the present application, Figure 1 As shown, an operating mechanism 100, a mechanism base 110 and a support plate 120 are provided. A first shaft 131 is provided on the mechanism base 110, and the mechanism base 110 is driven to rotate around the first shaft 131. The support plate 120 is rotatably connected to the mechanism base 110 through a second shaft 132, and the first shaft 131 passes through the support plate 120. The support plate 120 is also connected to a moving contact 150. An elastic member 140 is provided between the first shaft 131 and the moving contact 150. The elastic member 140 is used to provide contact pressure for the moving contact 150 close to the static contact 210 when the moving contact 150 contacts the static contact 210.

[0030] The operating mechanism 100 provided in the embodiment of the present application is applied to a circuit breaker and is used to drive the moving contact 150 to move according to the control movement of a handle or other control mechanism, so as to contact or separate from the static contact 210 to close or open the circuit breaker. Specifically, the operating mechanism 100 includes a mechanism base 110 and a support plate 120. The mechanism base 110 is connected and arranged in the housing of the circuit breaker via a first shaft 131. After the mechanism base 110 is driven, the mechanism base 110 rotates around the first shaft 131. The support plate 120 is rotatably connected to the mechanism base 110 via a second shaft 132, and the first shaft 131 passes through the support plate 120. When the mechanism base 110 is driven to rotate, it drives the support plate 120 to rotate. The support plate 120 is connected to the moving contact 150. The support plate 120 drives the moving contact 150 to rotate, so that the moving contact 150 contacts or separates from the static contact 210 during the rotation process. An elastic member 140 is provided between the first shaft 131 and the moving contact 150 , wherein the elastic member 140 is used to provide contact pressure for the moving contact 150 to approach the static contact 210 when the moving contact 150 contacts the static contact 210 , thereby achieving stable contact between the moving contact 150 and the static contact 210 .

[0031] In the embodiment of the present application, the rotation center of the mechanism base 110 is set to the first axis 131, and the rotation center of the support plate 120 is set to the second axis 132, so that the rotation centers of the mechanism base 110 and the support plate 120 are not coaxial. In this way, the elastic member 140 is set between the first axis 131 and the moving contact 150, which can simplify the structure of the operating mechanism 100 while providing contact pressure for the moving contact 150.

[0032] It can be understood that the support plate 120 is rotatably connected to the mechanism base 110 through the second axis 132, and the rotation center of the mechanism base 110 passes through the support plate 120. In order to enable the support plate 120 to rotate relative to the mechanism base 110, the hole through which the first axis 131 passes through the support plate 120 is a strip groove 121. When the mechanism base 110 and the support plate 120 rotate synchronously, the first axis 131 abuts against the side wall of the strip groove 121, and the support plate 120 rotates synchronously with the mechanism base 110 under the restriction of the first axis 131 and the second axis 132; when the mechanism base 110 and the support plate 120 rotate relative to each other, the position of the first axis 131 in the strip groove 121 changes to enable the support plate 120 to rotate relative to the mechanism base 110 around the second axis 132.

[0033] The present application provides an operating mechanism 100, a mechanism base 110 and a support plate 120, wherein a first shaft 131 is provided on the mechanism base 110, and the mechanism base 110 is driven to rotate around the first shaft 131, and the support plate 120 is rotatably connected to the mechanism base 110 through a second shaft 132, and the first shaft 131 passes through the support plate 120, so that the rotation centers of the support plate 120 and the mechanism base 110 are not coaxial, and the support plate 120 is further connected to a moving contact 150, so that the moving contact 150 is connected to the support plate 120. The plate 120 rotates synchronously, and an elastic member 140 is arranged between the first shaft 131 and the moving contact 150. The elastic member 140 is used to provide contact pressure close to the static contact 210 for the moving contact 150 when the moving contact 150 contacts the static contact 210, so as to achieve stable contact between the moving contact 150 and the static contact 210. The elastic member 140 is arranged between the first shaft 131 and the moving contact 150, which can simplify the structure of the operating mechanism 100 while providing contact pressure for the moving contact 150.

[0034] Optional, such as Figure 1 As shown, a third shaft 133 is connected to one side of the support plate 120 close to the moving contact 150 , and the elastic member 140 is disposed between the first shaft 131 and the third shaft 133 , wherein the first shaft 131 , the second shaft 132 and the third shaft 133 are not coplanar.

[0035] In the embodiment of the present application, a third shaft 133 is set, and the elastic member 140 is set between the first shaft 131 and the third shaft 133. This facilitates the setting of the elastic member 140. Specifically, the third shaft 133 is set on the side of the support plate 120 close to the moving contact 150, so that the elastic member 140 applies an elastic force to the side of the support plate 120 close to the moving contact 150, so that the elastic force on the support plate 120 is transmitted to the moving contact 150.

[0036] like Figure 1As shown, the first axis 131 , the second axis 132 and the third axis 133 are not coplanar, so that the first axis 131 , the second axis 132 and the third axis 133 enclose a triangular prism, which can improve stability during rotation.

[0037] It is understandable that if Figure 1 As shown, in order to reduce the volume occupied by the operating mechanism 100, the third shaft 133 and the first shaft 131 are arranged on the same side of the second shaft 132, and the third shaft 133 is arranged on the side of the first shaft 131 away from the second shaft 132, that is, Figure 5 As shown, the support plate 120 has an annular portion extending toward the second axis 132, and the third axis 133 is arranged in the annular portion. When the elastic member 140 is arranged between the first axis 131 and the third axis 133, the elastic member 140 makes the third axis 133 have an elastic force toward the first axis 131 or away from the first axis 131.

[0038] In one possible implementation of the embodiment of the present application, a strip groove 121 is provided on the support plate 120 , and the first shaft 131 passes through the strip groove 121 , so that one end of the support plate 120 is movably connected to the mechanism base 110 .

[0039] Optionally, the mechanism seat 110 is driven to rotate to bring the moving contact 150 into contact with the static contact 210, and after contact, the first shaft 131 moves in the strip groove 121 to make one end of the support plate 120 move relative to the first shaft 131, and the other end of the support plate 120 rotates around the second shaft 132 to make the moving contact 150 and the static contact 210 move relative to each other until the circuit breaker is closed.

[0040] The specific working process of the operating mechanism 100 is as follows: Figure 2 As shown in FIG, the operating mechanism 100 is in the open state. At this time, the mechanism base 110 is driven to rotate, and the support plate 120 abuts against the side wall of the strip groove 121, so that the support plate 120 and the mechanism base 110 rotate synchronously, thereby driving the moving contact 150 to rotate and contact the static contact 210, as shown in FIG. Figure 3 As shown, at this time, the moving contact 150 contacts the upper end of the static contact 210, and the contact 151 is in the just-contact state. Then, the mechanism base 110 is driven to continue to rotate. At this time, the second shaft 132 continues to rotate with the mechanism base 110. The moving contact 150 is blocked by the static contact 210 during the movement. At this time, the moving contact 150 moves downward along the static contact 210 until it is fully closed. Figure 4 As shown, during this process, the support plate 120 rotates around the second axis 132, and the first axis 131 moves along the strip groove 121, so that the third axis 133 moves away, and then the elastic member 140 stretches, thereby providing contact pressure for the moving contact 150, so that the moving contact 150 is in close contact with the static contact 210.

[0041] By providing the strip groove 121 , when the first shaft 131 moves in the strip groove 121 , the elastic member 140 is stretched, so that the elastic member 140 has elastic potential energy for retraction, thereby providing pressure for the moving contact 150 toward the static contact 210 .

[0042] In one possible implementation of the embodiment of the present application, Figure 5 and Figure 6 As shown, a mounting portion 122 is provided on one side of the support plate 120 close to the moving contact 150. The moving contact 150 is riveted to the mounting portion 122 so that the moving contact 150 can rotate relative to the mounting portion 122. The moving contact 150 includes two contacts 151 arranged opposite to each other and a connecting portion 152 connecting the two contacts 151. The connecting portion 152 is connected to the mounting portion 122.

[0043] When the moving contact 150 includes two contacts 151, the corresponding static silver points include two corresponding to the contacts 151 one by one. In actual applications, there are certain differences in the degree of wear of the two static silver points and the states of the contacts 151. This makes the contact between the moving contact 150 and the static contact 210 unstable. In order to improve the stability of the contact between the moving contact 150 and the static contact 210, the embodiment of the present application provides a mounting portion 122 on the side of the support plate 120 close to the moving contact 150. The two moving contacts 151 are connected by a connecting portion 152. The mounting portion 122 and the connecting portion 152 are riveted so that the two contacts 151 can rotate around the riveted part. In this way, when the moving contact 150 contacts the static contact 210, the connecting portion 152 rotates so that the two contacts 151 contact the static contact 210 one by one. The contact pressure of the two contact points 151 is the same, thereby improving the stability of the contact between the moving contact 150 and the static contact 210.

[0044] Optional, such as Figure 5 and Figure 6 As shown, the mounting portion 122 includes a boss extending out of the support plate 120 , and the connecting portion 152 is connected to the boss.

[0045] As can be seen from the above, the movable contact 150 can rotate around the rivet. In order to reduce the contact area between the connecting portion 152 and the mounting portion 122 during the rotation process, the embodiment of the present application is provided with a boss, and the connecting portion 152 is connected to the boss. The boss reduces the contact area between the connecting portion 152 and the mounting portion 122. In addition, a rivet hole is formed in the boss, through which the rivet passes.

[0046] In one feasible method of the embodiment of the present application, a baffle 123 is also connected to the end of the support plate 120, and the baffle 123 is arranged on the side of the moving contact 150 away from the static contact 210 to limit the position of the moving contact 150 after the moving contact 150 contacts the static contact 210.

[0047] According to the above, the two contacts 151 of the moving contact 150 can rotate around the riveted part to ensure stable contact between the moving contact 150 and the static contact 210. In order to prevent the moving contact 150 from rotating at too large an angle and affecting normal operation, the embodiment of the present application is also provided with a baffle 123 connected to the end of the support plate 120, and the baffle 123 is arranged on the side of the moving contact 150 away from the static contact 210. In this way, when the moving contact 150 rotates at too large an angle, the baffle 123 blocks the continued rotation of the moving contact 150, thereby improving the stability of the moving contact 150 when in contact with the static contact 210.

[0048] Optional, such as Figure 1 and Figure 2 As shown, the elastic member 140 is a tension spring, the mechanism base 110 includes mounting plates arranged opposite to each other, the first shaft 131 passes through the mounting plates on both sides, and the elastic member 140 and the support plate 120 are both located between the two mounting plates.

[0049] In order to improve the stability of the mechanism base 110, the mechanism base 110 is configured to include relatively arranged mounting plates, and the first shaft 131 passes through the mounting plates on both sides, so that the mechanism base 110 has two contact points 151 with the first shaft 131. In this way, under the guidance of the first shaft 131, the mechanism base 110 has higher stability when driven to rotate.

[0050] The elastic member 140 and the support plate 120 are arranged between two mounting plates. The mounting plates on both sides have a limiting effect on the elastic member 140 and the support plate 120, so that the overall structure of the operating mechanism 100 is more stable.

[0051] Among them, since the elastic member 140 is arranged between the first shaft 131 and the third shaft 133, the elasticity is set as a tension spring according to the characteristics of the shaft. In this way, hooks are set at both ends of the tension spring to fix the tension spring between the first shaft 131 and the third shaft 133. The tension spring has the advantage of easy installation.

[0052] In one possible implementation of the embodiment of the present application, Figure 5 and Figure 6 As shown, the mounting plates on both sides are connected by a connecting plate, and a first abutting portion 124 and a second abutting portion 125 are provided on one side of the support plate 120 close to the connecting plate. The first abutting portion 124 is used to abut against the end face of the connecting plate to limit the position during the rotation process, and the second abutting portion 125 is used to abut against the quick-connect member 220 during the rotation process.

[0053] Specifically, such as Figure 3As shown, during the closing process, the second abutting portion 125 abuts against the quick-closing member 220 of the handle, thereby synchronously closing the handle and the operating mechanism 100. During the opening process, the first abutting portion 124 abuts against the end surface of the connecting plate of the mechanism base 110, allowing the moving contact 150 to quickly separate from the static contact 210, thereby improving the breaking rate.

[0054] The present application also discloses a circuit breaker including the aforementioned operating mechanism 100. The circuit breaker has the same structure and benefits as the operating mechanism 100 in the aforementioned embodiment. The structure and benefits of the operating mechanism 100 have been described in detail in the aforementioned embodiment and will not be repeated here.

[0055] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. An operating mechanism, characterized in that: The invention comprises a mechanism seat (110) and a support plate (120), wherein a first shaft (131) is provided on the mechanism seat (110), and the mechanism seat (110) is driven to rotate around the first shaft (131), and the support plate (120) is rotatably connected to the mechanism seat (110) via a second shaft (132), and the first shaft (131) passes through the support plate (120), and the support plate (120) is also connected to a moving contact (150), and an elastic member (140) is provided between the first shaft (131) and the moving contact (150), and the elastic member (140) is used to provide the moving contact (150) with contact pressure close to the static contact (210) when the moving contact (150) contacts the static contact (210).

2. The operating mechanism according to claim 1, wherein: A third shaft (133) is connected to one side of the support plate (120) close to the moving contact (150), and the elastic member (140) is arranged between the first shaft (131) and the third shaft (133), wherein the first shaft (131), the second shaft (132) and the third shaft (133) are not coplanar.

3. The operating mechanism according to claim 2, wherein: A strip groove (121) is provided on the support plate (120), and the first shaft (131) passes through the strip groove (121), so that one end of the support plate (120) and the mechanism seat (110) are movably connected.

4. The operating mechanism according to claim 3, wherein: The mechanism seat (110) is driven to rotate and brings the moving contact (150) into contact with the static contact (210). After the contact, the first shaft (131) moves in the strip groove (121) to make one end of the support plate (120) move relative to the first shaft (131), and the other end of the support plate (120) rotates around the second shaft (132) to make the moving contact (150) and the static contact (210) move relative to each other until the switch is closed.

5. The operating mechanism according to claim 1, wherein: A mounting portion (122) is provided on one side of the support plate (120) close to the movable contact (150); the movable contact (150) is riveted to the mounting portion (122) so that the movable contact (150) can rotate relative to the mounting portion (122); the movable contact (150) includes two contacts (151) arranged opposite to each other and a connecting portion (152) connecting the two contacts (151); and the connecting portion (152) is connected to the mounting portion (122).

6. The operating mechanism according to claim 5, wherein: The mounting portion (122) includes a boss extending out of the support plate (120), and the connecting portion (152) is connected to the boss.

7. The operating mechanism according to claim 3, wherein: The end of the support plate (120) is also connected to a baffle (123), and the baffle (123) is arranged on a side of the moving contact (150) away from the static contact (210) to limit the position of the moving contact (150) after the moving contact (150) contacts the static contact (210).

8. The operating mechanism according to claim 2, wherein: The elastic member (140) is a tension spring, the mechanism seat (110) includes mounting plates arranged opposite to each other, the first shaft (131) passes through the mounting plates on both sides, and the elastic member (140) and the support plate (120) are both located between the two mounting plates.

9. The operating mechanism according to claim 8, wherein: The mounting plates at both sides are connected via a connecting plate. A first abutting portion (124) and a second abutting portion (125) are provided on one side of the support plate (120) close to the connecting plate. The first abutting portion (124) is used to abut against the end surface of the connecting plate for position limiting during rotation, and the second abutting portion (125) is used to abut against the quick-connecting member (220) during rotation.

10. A circuit breaker, characterized in that: The invention comprises an operating mechanism (100) according to any one of claims 1 to 9.

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