Closing spring and circuit breaker

Abstract

The utility model belongs to the technical field of switches, and discloses a closing spring and a circuit breaker, the closing spring comprises a spring piece, a screw joint piece and an adjusting assembly, the first end of the spring piece is used for connecting a spring crank arm of an operating mechanism; the first end of the screwing piece is inserted into the second end of the spring piece, and the second end of the screwing piece is used for connecting a frame body of the operating mechanism; the adjusting assembly comprises at least two threaded sleeve pieces and elastic pads, the threaded sleeve pieces are in threaded connection with the threaded connection piece, the elastic pads are clamped between every two adjacent threaded sleeve pieces, and the threaded sleeve piece close to the spring piece abuts against the second end of the spring piece. According to the closing spring provided by the utility model, the adjustment of the pre-compression amount can be conveniently completed, and the adjustment efficiency can be effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to switch technical field especially relates to a closing spring and circuit breaker. BACKGROUND

[0002] Vacuum circuit breaker is widely used as switch product, and its closing spring of operating mechanism is used to complete closing operation after energy storage, which requires that the closing spring reaches certain energy storage requirement after energy storage, otherwise it cannot complete closing operation smoothly.

[0003] In the related art, the closing speed of the vacuum circuit breaker is fixed and does not have a disassembly-free adjustment function. If the closing speed of the vacuum circuit breaker is unqualified, the closing spring needs to be disassembled as a whole, the pre-compression amount of the closing spring needs to be adjusted, and the closing spring needs to be mounted on the operating mechanism after the adjustment is completed, resulting in a complicated and low-efficiency adjustment process of the pre-compression amount of the closing spring, i.e., the closing speed of the vacuum circuit breaker. SUMMARY

[0004] An object of the utility model is to provide a closing spring, which facilitates the adjustment of the pre-compression amount and effectively improves the adjustment efficiency.

[0005] To achieve the object, the utility model adopts the following technical solutions:

[0006] A closing spring is provided and applied to a switch product, the switch product includes an operating mechanism, and the closing spring includes:

[0007] A spring part, a first end of the spring part is used to connect a spring crank of the operating mechanism;

[0008] A screw part, a first end of the screw part is inserted into a second end of the spring part, and a second end of the screw part is used to connect a frame of the operating mechanism;

[0009] An adjustment assembly, including a screw sleeve and an elastic pad, the screw sleeve is provided with at least two and is in threaded connection with the screw part, the elastic pad is clamped between two adjacent screw sleeves, and the screw sleeve close to the spring part is in abutment with the second end of the spring part.

[0010] Optionally, the screw part includes:

[0011] A first guide rod, a first end of the first guide rod is inserted into a second end of the spring part, a second end of the first guide rod is provided with external threads, and the first guide rod is in threaded connection with the screw sleeve through the external threads;

[0012] A first boss, connected with the second end of the first guide rod, used to connect the frame.

[0013] Optionally, the closing spring further comprises a connecting lug connected with the first end of the spring member, and the spring member is hinged with the spring crank via the connecting lug, and the second end of the screw member is hinged with the frame body.

[0014] Optionally, the connecting lug comprises:

[0015] a second lug abutting against the first end of the spring member, and the second lug is hinged with the spring crank;

[0016] a second guide rod, the first end of the second guide rod is connected with the second lug, the second end of the second guide rod is inserted into the first end of the spring member, and one of the second end of the second guide rod and the first end of the screw member is provided with a guide channel, and the other is slidingly inserted into the guide channel.

[0017] Optionally, the guide channel is provided on the screw member, and the guide channel penetrates the screw member along the axial direction of the screw member, the second end of the screw member is provided with a hinge hole in communication with the guide channel, and the screw member is hinged with the shaft member on the frame body via the hinge hole.

[0018] Optionally, the screw member is hinged with the frame body via a first bearing provided on the screw member;

[0019] and / or, the connecting lug is hinged with the spring crank via a second bearing provided on the connecting lug.

[0020] Optionally, the elastic pad is a spring washer.

[0021] Optionally, the outer diameter of the spring member is less than or equal to the outer diameter of the screw member.

[0022] Optionally, the outer periphery of the screw member is provided with a groove and / or a protrusion.

[0023] Another purpose of the utility model lies in providing a circuit breaker comprising an operating mechanism and the closing spring.

[0024] Beneficial effects: the closing spring provided by the utility model, when the closing spring installed on the operating mechanism needs to be adjusted, firstly, except the screw sleeve part abutting against the spring part, the rest screw sleeve parts are loosened in turn in the direction away from the spring part, then, the position of the screw sleeve part abutting against the spring part is adjusted to adjust the pre-compression amount of the closing spring, when the pre-compression amount of the closing spring meets the requirement, the rest screw sleeve parts are tightened in turn in the direction close to the spring part to clamp all the elastic pads, the fixation of the adjusting assembly relative to the screw part is realized, the adjustment is facilitated, the closing spring does not need to be disassembled and assembled on the operating mechanism, and the adjustment efficiency is effectively improved, in addition, the elastic pads can prevent the screw sleeve part from being loose, and the pre-compression amount of the closing spring is accurately and reliably ensured.

[0025] The circuit breaker provided by the utility model can complete the adjustment of the pre-compression amount without disassembling and assembling the closing spring on the operating mechanism, and the adjustment efficiency is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0026] Fig. 1 is a structure schematic view of the closing spring provided by the utility model;

[0027] Fig. 2 is a structure explosion view of the closing spring provided by the utility model;

[0028] Fig. 3 is a structure schematic view of the circuit breaker provided by the utility model.

[0029] In the drawing:

[0030] 110, operating mechanism; 111, spring crank; 112, frame body; 113, shaft part; 120, closing spring; 130, pole column switch;

[0031] 200, spring part;

[0032] 300, screw part; 310, first guide rod; 320, first boss; 321, hinged hole; 322, notch;

[0033] 400, adjusting assembly; 410, screw sleeve part; 4101, recess; 411, first screw sleeve part; 412, second screw sleeve part; 420, elastic pad;

[0034] 500, connecting lug; 510, second boss; 520, second guide rod;

[0035] 600, second bearing. DETAILED DESCRIPTION

[0036] The utility model will be described in further detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are merely intended to explain the utility model and not to limit the utility model. In addition, it should be noted that only the parts related to the utility model are shown in the drawings for ease of description, not all the structures.

[0037] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0038] In the utility model, unless otherwise explicitly specified and limited, the first feature "on" or "below" the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0039] In the description of the embodiment, the terms "up", "down", "right", etc. orientation or position relationship is based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0040] Referring to Figs. 1-3 The embodiment provides a closing spring 120 applied to a switch product.

[0041] Specifically, the switch product comprises an operating mechanism 110. Exemplarily, the switch product includes but is not limited to a three-position switch or a circuit breaker.

[0042] Specifically, the closing spring 120 comprises a spring piece 200, a screw piece 300 and an adjusting assembly 400. The first end of the spring piece 200 is used to connect the spring crank 111 of the operating mechanism 110; the first end of the screw piece 300 is inserted into the second end of the spring piece 200, and the second end of the screw piece 300 is used to connect the frame 112 of the operating mechanism 110; the adjusting assembly 400 comprises a screw sleeve piece 410 and an elastic pad 420, the screw sleeve piece 410 is provided with at least two and is screwed with the screw piece 300, the elastic pad 420 is clamped between the adjacent two screw sleeve pieces 410, and the screw sleeve piece 410 close to the spring piece 200 abuts against the second end of the spring piece 200.

[0043] In the embodiment, when the closing spring 120 installed on the operating mechanism 110 needs to be adjusted, first, except for the screw sleeve piece 410 abutting against the spring piece 200, the remaining screw sleeve pieces 410 are loosened in turn away from the spring piece 200; then, the position of the screw sleeve piece 410 abutting against the spring piece 200 is adjusted to adjust the pre-compression amount of the closing spring 120. When the pre-compression amount of the closing spring 120 meets the requirements, the remaining screw sleeve pieces 410 are tightened in turn close to the spring piece 200 to clamp all the elastic pads 420, so as to fix the adjusting assembly 400 relative to the screw piece 300, facilitate the adjustment, and do not need to disassemble and assemble the closing spring 120 on the operating mechanism 110, effectively improving the adjustment efficiency. In addition, the elastic pad 420 can prevent the screw sleeve piece 410 from being loose, effectively ensuring the pre-compression amount of the closing spring 120 accurate and reliable.

[0044] In a feasible implementation, when the pre-compression amount of the closing spring 120 meets the requirements, the screw sleeve piece 410 abutting against the spring piece 200 can be fixed by a tool (not shown) to keep the screw sleeve piece 410 relatively fixed with the screw piece 300, so as to prevent the screw sleeve piece 410 from rotating when the remaining screw sleeve pieces 410 are tightened, effectively ensuring the pre-compression amount of the closing spring 120 accurate and reliable. The tool can be designed according to the specific structure of the closing spring 120, as long as it can fix the screw sleeve piece 410, which is not the focus of the embodiment, and will not be described in detail here. When the screw sleeve piece 410 is loosened, the remaining screw sleeve pieces 410 fastened with the screw sleeve piece 410 can also be fixed by the tool to loosen the screw sleeve piece 410 more easily.

[0045] Exemplarily, the adjusting assembly 400 comprises two screw sleeve members 410, i.e. a first screw sleeve member 411 and a second screw sleeve member 412, wherein the second screw sleeve member 412 abuts against the second end of the spring member 200. When adjusting the pre-compression amount of the closing spring 120, first, the second screw sleeve member 412 can be fixed by a tooling, and then the first screw sleeve member 411 is loosened; then, the tooling is removed, and the position of the second screw sleeve member 412 is adjusted; when the pre-compression amount of the closing spring 120 meets the requirement, the second screw sleeve member 412 is fixed by the tooling again, and then the second screw sleeve member 412 is tightened to complete the adjustment.

[0046] In an available embodiment, the outer periphery of the screw sleeve member 410 is provided with a groove 4101 and / or a protrusion. It can be understood that the tooling and the tool can also be provided with the groove 4101 and / or the protrusion to match the outer periphery of the screw sleeve member 410, so as to facilitate the tool to cover the outer periphery of the screw sleeve member 410 and to screw the screw sleeve member 410, and to facilitate the tooling to fix the screw sleeve member 410.

[0047] Exemplarily, the screw sleeve member 410 is provided with a plurality of grooves 4101 at intervals in the circumferential direction, so as to ensure the stable and reliable connection with the tooling and the tool.

[0048] In an available embodiment, the elastic pad 420 is provided as a spring washer, which can increase the friction between the screw member 300 and the screw sleeve member 410, and has a good relaxation effect. Of course, the elastic pad 420 can also be provided as a rubber pad or other elastic pad 420 with anti-skid effect, which is not limited in the present embodiment.

[0049] In an available embodiment, the outer diameter of the spring member 200 is less than or equal to the outer diameter of the screw sleeve member 410, so that the screw sleeve member 410 has sufficient contact area with the second end of the spring member 200, so as to ensure that the screw sleeve member 410 can stably compress the spring member 200. When the outer periphery of the screw sleeve member 410 is an irregular structure surface, the outer diameter of the screw sleeve member 410 is the diameter of the circumscribed circle of the screw sleeve member 410.

[0050] In the present embodiment, reference is made to Fig. 2 and Fig. 3As shown, the screwing piece 300 comprises a first guide rod 310 and a first boss 320, wherein the first end of the first guide rod 310 is inserted into the second end of the spring piece 200, the second end of the first guide rod 310 is provided with external threads, and the first guide rod 310 is threadedly connected with the screw sleeve piece 410 through the external threads; the first boss 320 is connected with the second end of the first guide rod 310, and the first boss 320 is used for connecting the frame body 112 of the operating mechanism 110. It can be understood that the first end of the first guide rod 310 is a smooth curved surface, which can guide the compression and release of the spring piece 200, and effectively prevent the spring piece 200 from being stuck when being compressed and released, so as to ensure that the closing spring 120 can be stably and reliably compressed and released. In addition, the first boss 320 can prevent the screw sleeve piece 410 from being separated from the first guide rod 310, and is convenient for being connected with the frame body 112 of the operating mechanism 110.

[0051] In the embodiment, the closing spring 120 further comprises a connecting lug 500, the connecting lug 500 is connected with the first end of the spring piece 200, and the spring piece 200 is hinged with the spring crank arm 111 of the operating mechanism 110 through the connecting lug 500, the second end of the screwing piece 300 is hinged with the frame body 112, which is convenient for assembly and effectively prevents the spring piece 200 from being stuck when being compressed and released.

[0052] Specifically, the connecting lug 500 comprises a second boss 510 and a second guide rod 520, wherein the second boss 510 abuts against the first end of the spring piece 200, and the second boss 510 is hinged with the spring crank arm 111 of the operating mechanism 110; the first end of the second guide rod 520 is connected with the second boss 510, the second end of the second guide rod 520 is inserted into the first end of the spring piece 200, and one of the second end of the second guide rod 520 and the first end of the screwing piece 300 is provided with a guide channel (not shown), and the other is slidingly inserted into the guide channel. In the embodiment, the second guide rod 520 is slidingly matched with the screwing piece 300, which can guide the compression and release of the spring piece 200, and effectively prevent the spring piece 200 from being stuck when being compressed and released. In addition, the second boss 510 abuts against the first end of the spring piece 200, which cooperates with the second end of the spring piece 200 abutting against the screw sleeve piece 410, so as to effectively ensure that the compression and release of the spring piece 200 are stable and reliable.

[0053] In some embodiments, the screwing piece 300 is provided with a first bearing (not shown), and the screwing piece 300 is hinged with the frame body 112 through the first bearing, which is convenient for assembly and effectively ensures that the screwing piece 300 can stably and reliably rotate around the shaft piece 113 when the spring piece 200 is compressed and released. Specifically, the first bearing is arranged on the first boss 320.

[0054] In some other embodiments, the guide channel is arranged on the screw member 300 and extends through the screw member 300 along the axial direction of the screw member 300, and the second end of the screw member 300 is provided with a hinge hole 321 which is in communication with the guide channel, and the screw member 300 is hinged with the shaft member 113 on the frame 112 of the operating mechanism 110 through the hinge hole 321. It can be understood that the guide channel extends through the first guide rod 310 and the first boss 320, and the hinge hole 321 is arranged on the first boss 320. In the present embodiment, the guide channel is in communication with the hinge hole 321, which can reduce the contact area between the shaft member 113 and the hinge hole 321, facilitate assembly, and effectively ensure that the screw member 300 can stably and reliably rotate around the shaft member 113 when the spring member 200 is compressed and released. Exemplarily, the periphery of the first boss 320 is further provided with a notch 322 which is in communication with the hinge hole 321, which can further reduce the contact area between the shaft member 113 and the hinge hole 321.

[0055] Of course, the screw member 300 can also be hinged with the spring crank 111 through a sliding sleeve, a coating film or other means, which is not limited in the present embodiment.

[0056] In a feasible implementation, taking the guide channel arranged on the screw member 300 as an example, the second guide rod 520 has a stepped structure, the small end of the second guide rod 520 is slidingly inserted into the guide channel, the large end of the second guide rod 520 is connected with the second boss 510, and the large end of the second guide rod 520 can be in clearance fit with the spring member 200, so as to realize the positioning assembly of the connecting lug 500 and the spring member 200.

[0057] In a feasible implementation, the connecting lug 500 is provided with the second bearing 600, and the connecting lug 500 is hinged with the spring crank 111 through the second bearing 600, which facilitates assembly and effectively ensures that the connecting lug 500 can stably and reliably rotate relative to the spring crank 111 when the spring member 200 is compressed and released. Specifically, the second bearing 600 is arranged on the second boss 510. Exemplarily, the side of the second boss 510 away from the second guide rod 520 is provided with an ear portion for mounting the second bearing 600. Of course, the connecting lug 500 can also be hinged with the spring crank 111 through a sliding sleeve, a coating film or other means, which is not limited in the present embodiment.

[0058] Continuing to refer to Figs. 1-3 The present embodiment also provides a circuit breaker, which comprises the operating mechanism 110 and the closing spring 120 described above, the first end of the spring member 200 of the closing spring 120 is connected with the spring crank 111 of the operating mechanism 110, and the second end of the screw member 300 of the closing spring 120 is connected with the frame 112 of the operating mechanism 110. In the present embodiment, the adjustment of the pre-compression amount can be completed without disassembling and assembling the closing spring 120 on the operating mechanism 110, which effectively improves the adjustment efficiency.

[0059] In particular, the circuit breaker further comprises at least one pole column switch 130, for example three, and the operating mechanism 110 can control the opening and closing of the pole column switch 130. It can be understood that when the spring member 200 is released, the pole column switch 130 can be closed by the operating mechanism 110.

[0060] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the embodiments of the present application. For those skilled in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present application. Here, it is not necessary and impossible to enumerate all the embodiments. Any modification, equivalent substitution and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application claim.

Claims

1. A closing spring, applied to a switch product, said switch product including an operating mechanism (110), characterized in that, The closing spring includes: A spring member (200), the first end of which is used to connect to the spring crank arm (111) of the operating mechanism (110); A screw connector (300) is provided, the first end of which is inserted into the second end of the spring member (200), and the second end of the screw connector (300) is used to connect to the frame (112) of the operating mechanism (110); The adjusting assembly (400) includes a screw assembly (410) and an elastic pad (420). The screw assembly (410) is provided in at least two and is threadedly connected to the screw connector (300). The elastic pad (420) is sandwiched between two adjacent screw assemblies (410), and the screw assembly (410) near the spring member (200) abuts against the second end of the spring member (200).

2. The closing spring according to claim 1, characterized in that, The screw connector (300) includes: A first guide rod (310) is inserted at its first end into the second end of the spring member (200). The second end of the first guide rod (310) is provided with an external thread. The first guide rod (310) is threadedly connected to the screw assembly (410) through the external thread. The first boss (320) is connected to the second end of the first guide rod (310), and the first boss (320) is used to connect the frame (112).

3. The closing spring according to claim 1, characterized in that, It also includes a connecting lug (500) connected to the first end of the spring member (200), and the spring member (200) is hinged to the spring crank arm (111) through the connecting lug (500), and the second end of the screw member (300) is hinged to the frame (112).

4. The closing spring according to claim 3, characterized in that, The connecting ear (500) includes: The second boss (510) abuts against the first end of the spring member (200), and the second boss (510) is hinged to the spring crank arm (111); The second guide rod (520) has its first end connected to the second boss (510), and its second end inserted into the first end of the spring member (200). One of the second end of the second guide rod (520) and the first end of the screw member (300) is provided with a guide channel, and the other is slidably inserted into the guide channel.

5. The closing spring according to claim 4, characterized in that, The guide channel is provided on the screw connector (300), and the guide channel passes through the screw connector (300) along the axial direction of the screw connector (300). The second end of the screw connector (300) is provided with a hinge hole (321) communicating with the guide channel. The screw connector (300) is hinged to the shaft (113) on the frame (112) through the hinge hole (321).

6. The closing spring according to claim 3, characterized in that, The screw connector (300) is provided with a first bearing, and the screw connector (300) is hinged to the frame (112) through the first bearing; And / or, the connecting lug (500) is provided with a second bearing (600), and the connecting lug (500) is hinged to the spring crank arm (111) through the second bearing (600).

7. The closing spring according to claim 1, characterized in that, The elastic pad (420) is configured as a spring washer.

8. The closing spring according to any one of claims 1-7, characterized in that, The outer diameter of the spring (200) is less than or equal to the outer diameter of the screw assembly (410).

9. The closing spring according to any one of claims 1-7, characterized in that, The outer periphery of the screw assembly (410) is provided with a groove (4101) and / or a protrusion.

10. A circuit breaker, characterized in that, It includes an operating mechanism (110) and a closing spring (120) as described in any one of claims 1-9.

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