CN221040955U - Buffer assembly and vacuum circuit breaker - Google Patents

Abstract

Embodiments of the present disclosure provide a buffer assembly and a vacuum circuit breaker. The damper assembly includes a spindle rotatable to switch between a closed position and an open position; paired pressing arms provided on the main shaft and rotatable together with the main shaft; and a pair of buffers provided in correspondence with the pair of pressing arms, each buffer of the pair of buffers including a moving member capable of switching between a release position and a pressing position, wherein in a case where the spindle is in the closing position, the moving member of each buffer is spaced apart from the corresponding pressing arm and is in the release position, and in a process where the spindle is switched from the closing position to the opening position, the spindle is capable of driving the pair of pressing arms to rotate to press the moving member of the pair of buffers, and in a case where one of the moving members is pressed to the pressing position by the corresponding pressing arm, the other moving member is pressed to a position between the release position and the pressing position by the corresponding pressing arm.

Description

Buffer assembly and vacuum circuit breaker

Technical Field

Embodiments of the present disclosure relate generally to the technical field of electrical equipment, and more particularly, to a snubber assembly and a vacuum circuit breaker including the snubber assembly.

Background

The vacuum circuit breaker is named because the arc extinguishing medium and the insulating medium of the contact gap after arc extinguishing are both high vacuum; the arc extinguishing device has the advantages of small volume, light weight, suitability for frequent operation and no maintenance in arc extinguishing, and is more popular in power distribution networks.

The damper assembly in the vacuum circuit breaker has a large damping performance in a low-temperature environment, and in order to meet the requirement of the vacuum circuit breaker in the low-temperature environment, the damping force provided by the damper assembly needs to be properly reduced.

Disclosure of utility model

It is an object of the present disclosure to provide a snubber assembly and vacuum circuit breaker to at least partially solve the above-mentioned problems.

In a first aspect of the present disclosure, there is provided a damper assembly comprising a spindle rotatable to switch between a closed position and an open position; a pair of pressing arms provided on the spindle and rotatable with the spindle; and a pair of buffers provided in correspondence with the pair of pressing arms, each buffer of the pair of buffers including a moving member capable of switching between a release position and a pressing position, wherein the moving member of each buffer is spaced apart from the corresponding pressing arm and is in the release position with the spindle in the closing position, and the spindle is capable of rotating the pair of pressing arms to press the moving member of the pair of buffers during switching of the spindle from the closing position to the opening position, and the other moving member is pressed to one position between the release position and the pressing position with one of the moving members being pressed to the pressing position by the corresponding pressing arm.

According to the embodiment of the disclosure, in the case that the main shaft is in the closing position, the moving member of each buffer is spaced apart from the corresponding pressing arm and is in the releasing position, and in the process that the main shaft is switched from the closing position to the opening position, the main shaft can drive the pair of pressing arms to rotate to press the moving members of the pair of buffers, and in the case that one of the moving members is pressed to the pressing position by the corresponding pressing arm, the other moving member is pressed to one of the releasing position and the pressing position by the corresponding pressing arm. Thus, the damper assembly of the embodiment of the present disclosure can avoid the pressing arms of the pair of dampers from being pressed to the pressing position, thereby appropriately reducing the damping force provided by the damper assembly.

In some embodiments, the pair of buffers includes a first buffer and a second buffer, the pair of pressing arms includes a first pressing arm and a second pressing arm, the first pressing arm and the second pressing arm are disposed on the spindle and spaced apart, wherein the first pressing arm presses the moving member of the first buffer and the second pressing arm presses the moving member of the second buffer during switching of the spindle from the closing position to the opening position.

In some embodiments, the damper assembly further comprises a housing, the first damper and the second damper being disposed on a floor of the housing, wherein the distance of the moving member of the first damper from the floor is greater than the distance of the moving member of the second damper from the floor with the moving member in the released position.

In some embodiments, the first bumper and the second bumper are staggered or aligned along a direction parallel to an axial direction of the spindle.

In some embodiments, in the case where the first bumper and the second bumper are staggered in a direction parallel to the axial direction of the spindle, the first bumper is more adjacent to the spindle than the second bumper, and the length of the first pressing arm is smaller than the length of the second pressing arm.

In some embodiments, the second pressing arm contacts the moving member of the second bumper with the first pressing arm contacting the moving member of the first bumper; or alternatively

The second pressing arm is spaced apart from the moving member of the second bumper with the first pressing arm contacting the moving member of the first bumper.

In some embodiments, the length of the first pressing arm is equal to the length of the second pressing arm in a case where the first bumper and the second bumper are aligned in a direction parallel to an axial direction of the spindle, so that the second pressing arm is spaced apart from the moving member of the second bumper in a case where the first pressing arm contacts the moving member of the first bumper.

In some embodiments, the bumper assembly further includes a first pad disposed between the first bumper and the base plate and a second pad disposed between the second bumper and the base plate, and the first pad has a height greater than a height of the second pad.

In some embodiments, the damper further comprises a damper chamber within which the mover is movable to switch between the release position and the pressing position.

In some embodiments, the buffer further comprises hydraulic oil disposed within the buffer chamber, and the buffer chamber comprises a vacuum chamber.

In a second aspect of the present disclosure, there is provided a vacuum circuit breaker including: a buffer assembly according to any one of the first aspects of the present disclosure; and one end of the executing component is connected with the main shaft of the buffer component, and the other end of the executing component is connected with the contact component.

It should be understood that what is described in this section is not intended to limit the key features or essential features of the embodiments of the present disclosure, nor is it intended to limit the scope of the present disclosure. Other features of the present disclosure will become apparent from the following description.

Drawings

The above and other features, advantages and aspects of embodiments of the present disclosure will become more apparent by reference to the following detailed description when taken in conjunction with the accompanying drawings. In the drawings, wherein like or similar reference numerals denote like or similar elements, in which:

FIG. 1 illustrates a cross-sectional view of a damper assembly according to some embodiments of the present disclosure;

FIG. 2 illustrates a schematic structural view of a pressing arm, a spindle, and a pair of bumpers, in which the spindle is in a tripped position, according to some embodiments of the present disclosure;

FIG. 3 illustrates a schematic structural view of a pressing arm, a spindle, and a pair of bumpers in accordance with further embodiments of the present disclosure, in which the spindle is in a tripped position;

FIG. 4 is a schematic view showing the structure of the pressing arm, spindle and a damper shown in FIG. 3, wherein the spindle is in a brake-off position;

FIG. 5 shows a schematic view of the pressing arm, spindle and another damper of FIG. 3, with the spindle in the off position;

fig. 6 illustrates a cross-sectional view of a bumper according to further embodiments of the present disclosure.

Reference numerals illustrate:

100 is a buffer assembly;

1 is a shell, 11 is a bottom plate;

2 is a main shaft;

3 is a pressing arm, 31 is a first pressing arm, 32 is a second pressing arm;

4 is a buffer, 41 is a first buffer, 42 is a second buffer, 431 is a buffer chamber, 432 is hydraulic oil, 44 is a moving member, 441 is a piston rod, 442 is a piston, and 45 is a resetting member; 51 is a first pad and 52 is a second pad.

Detailed Description

Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present disclosure are illustrated in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

The term "comprising" and variations thereof as used herein means open ended, i.e., "including but not limited to. The term "or" means "and/or" unless specifically stated otherwise. The term "based on" means "based at least in part on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment. The term "another embodiment" means "at least one additional embodiment". The terms "first," "second," and the like, may refer to different or the same object.

As described hereinabove, the damper assembly has a large damping performance in a low temperature environment, and in order to satisfy the application of the vacuum circuit breaker in a low temperature environment, it is necessary to appropriately reduce the damping force provided by the damper assembly. Embodiments of the present disclosure provide a damper assembly 100 to at least partially address the above-described problems. Hereinafter, the principles of the present disclosure will be described with reference to fig. 1 to 6.

Fig. 1 illustrates a cross-sectional view of a damper assembly 100 according to some embodiments of the present disclosure. As shown in fig. 1, the damper assembly 100 described herein generally includes a housing 1, a spindle 2, a pair of pressing arms 3, and a pair of dampers 4. The housing 1 serves as a mounting carrier, the pair of bumpers 4 are provided on a bottom plate 11 of the housing 1, and the spindle 2 and the pressing arm 3 are respectively located in the housing 1. The main shaft 2 is connected to an actuating assembly (not shown) in the vacuum circuit breaker, and the actuating assembly is connected to a contact assembly (not shown). The spindle 2 can be rotated under force and switched between a closing position and a opening position. Obviously, in the case that the main shaft 2 is in the closing position, the actuating assembly controls the contact assembly and connects the contact assembly, so as to close the vacuum circuit breaker; while in the case of the main shaft 2 being in the opening position, the actuating assembly controls the contact assembly and opens the contact assembly, thereby opening the vacuum circuit breaker.

With continued reference to fig. 1, in some embodiments, a pair of pressing arms 3 are provided on the spindle 2 and are rotatable with the spindle 2. The pair of buffers 4 are provided corresponding to the pair of pressing arms 3, and each buffer 4 of the pair of buffers 4 includes a moving member 44. The movable member 44 is switchable between a release position, which is a position at which the movable member 44 is not forced but not pressed, and a pressing position, which is a position at which the movable member 44 can be pressed by a maximum distance. Obviously, with the spindle 2 in the closing position, the moving member 44 of each damper 4 is spaced apart from the corresponding pressing arm 3, and the moving member 3 is in the releasing position. In the process of switching the spindle 2 from the closing position to the opening position, the spindle 2 can drive the pair of pressing arms 3 to rotate, and the pressing arms 3 press the moving pieces 44 of the pair of buffers 4, and in the case where one of the moving pieces 44 is pressed to the pressing position by the corresponding pressing arm 3, the other moving piece 44 is pressed to one position between the releasing position and the pressing position by the corresponding pressing arm 3.

With the above configuration, the damper assembly 100 of the embodiment of the present disclosure can avoid the pressing arms 3 of the pair of dampers 4 from being pressed to the pressing position, thereby appropriately reducing the damping force provided by the damper assembly 100, and further satisfying the application of the vacuum circuit breaker in a low-temperature environment. It can be seen that the buffer 4 pressed to the pressing position plays a role of buffering and also plays a role of limiting the opening of the vacuum circuit breaker; while the other buffer 4 only serves as a buffer.

Hereinafter, the operation principle of the present disclosure will be mainly exemplified in the case where the pair buffer 4 includes the first buffer 41 and the second buffer 42. Of course, the case where the number of buffers is three and includes the first buffer, the second buffer, and the third buffer is also similar as long as the first buffer is pressed to the pressing position and the second buffer and the third buffer are both pressed to one position between the release position and the pressing position.

It should be noted that the numbers, values, numbers, etc. mentioned above and as may be referred to elsewhere in the disclosure are exemplary and are not intended to limit the scope of the disclosure in any way. Any other suitable numbers, values, numbers are possible. For example, the buffer 4 may comprise a greater number, depending on the particular application scenario and requirements.

With continued reference to fig. 1, the pair of bumpers 4 includes a first bumper 41 and a second bumper 42, and the first bumper 41 and the second bumper 42 are provided on the bottom plate 11 of the housing 1, and the pair of pressing arms 3 includes a first pressing arm 31 and a second pressing arm 32, respectively. The first pressing arm 31 and the second pressing arm 32 are also provided on the spindle 2, and the first pressing arm 31 and the second pressing arm 32 are spaced apart to avoid a phenomenon of mechanical interference. Obviously, in the process of switching the spindle 2 from the closing position to the opening position, the first pressing arm 31 presses the moving member 44 of the first buffer 41, and then the second pressing arm 32 presses the moving member 44 of the second buffer 42.

Fig. 2 shows a schematic structural view of the pressing arm 3, the spindle 2, and the pair of buffers 4, with the spindle 2 in the off-gate position, according to some embodiments of the present disclosure. Fig. 3 shows a schematic structural view of the pressing arm 3, the spindle 2, and the pair of buffers 4 according to other embodiments of the present disclosure, in which the spindle 2 is in the open position. Fig. 4 shows a schematic view of the pressing arm 3, spindle 2 and a damper 4 of fig. 3, wherein the spindle 2 is in the release position. Fig. 5 shows a schematic view of the structure of the pressing arm 3, the spindle 2 and the further damper 4 shown in fig. 3, wherein the spindle 2 is in the release position. As shown in fig. 2 to 5, in the case where the spindle 2 is in the open position, one of the buffers 4 is pressed to the pressing position, and the other buffer 4 is pressed to a position between the release position and the pressing position.

As shown in fig. 2, in some embodiments, the first bumper 41 and the second bumper 42 are staggered in a direction parallel to the axial direction of the spindle 2, the first bumper 41 is closer to the spindle 2 than the second bumper 42, and the length of the first pressing arm 31 is smaller than the length of the second pressing arm 32. With the moving member 44 in the release position, the distance of the moving member 44 of the first damper 41 from the base plate 11 is greater than the distance of the moving member 44 of the second damper 42 from the base plate 11, that is, the installation height of the first damper 41 is higher than the installation height of the second damper 42.

Further, in the process of switching the spindle 2 from the closing position to the opening position, the first pressing arm 31 contacts the moving piece 44 of the first buffer 41 and the second pressing arm 32 contacts the moving piece 44 of the second buffer 42, but since the movement path of the second pressing arm 32 is larger than that of the first pressing arm 31 in the case where the spindle 2 is rotated by the same angle, the second pressing arm 32 presses the second buffer 42 to the pressing position at first, and the first pressing arm 31 presses the first buffer 41 to a position between the releasing position and the pressing position. In this case, the second buffer 42 plays a role of buffering and also plays a role of limiting the opening of the vacuum circuit breaker; while the first buffer 41 only plays a role of buffering.

With continued reference to fig. 2, in other embodiments, the first bumper 41 and the second bumper 42 are offset in a direction parallel to the axial direction of the spindle 2, the first bumper 41 is closer to the spindle 2 than the second bumper 42, and the length of the first pressing arm 31 is smaller than the length of the second pressing arm 32. With the moving member 44 in the release position, the distance of the moving member 44 of the first damper 41 from the base plate 11 is greater than the distance of the moving member 44 of the second damper 42 from the base plate 11, that is, the installation height of the first damper 41 is higher than the installation height of the second damper 42.

With continued reference to fig. 2, further, in the case where the first pressing arm 31 contacts the moving member 44 of the first buffer 41 during the switching of the spindle 2 from the closing position to the opening position, the second pressing arm 32 is spaced apart from the moving member 44 of the second buffer 42, and the first pressing arm 31 presses the first buffer 41 to the pressing position at first, and the second pressing arm 32 presses the second buffer 42 to a position between the releasing position and the pressing position. In this case, the first buffer 41 plays a role of buffering and also plays a role of limiting the opening of the vacuum circuit breaker; while the second buffer 42 only serves as a buffer.

With continued reference to fig. 2, it can be seen that by adjusting the difference in length between the first pressing arm 31 and the second pressing arm 32 and the difference in mounting height between the first buffer 41 and the second buffer 42, even in the case where the first pressing arm 31 first contacts the moving member 44 of the first buffer 41, since the second pressing arm 32 has a length greater than that of the first pressing arm 31, the second pressing arm 32 can first press the second buffer 42 to the pressing position, and the first pressing arm 31 presses the first buffer 41 to a position between the release position and the pressing position. In this case, the second buffer 42 plays a role of buffering and also plays a role of limiting the opening of the vacuum circuit breaker; while the first buffer 41 only plays a role of buffering.

With continued reference to fig. 3-5, in still other embodiments, the first bumper 41 and the second bumper 42 are aligned along a direction parallel to the axial direction of the spindle 2, and the length of the first pressing arm 31 is equal to the length of the second pressing arm 32. With the moving member 44 in the release position, the distance of the moving member 44 of the first damper 41 from the base plate 11 is greater than the distance of the moving member 44 of the second damper 42 from the base plate 11, that is, the installation height of the first damper 41 is higher than the installation height of the second damper 42.

With continued reference to fig. 3 to 5, further, in the case where the first pressing arm 31 contacts the moving member 44 of the first buffer 41 during the switching of the spindle 2 from the closing position to the opening position, the second pressing arm 32 is spaced apart from the moving member 44 of the second buffer 42, and the first pressing arm 31 presses the first buffer 41 to the pressing position at first, and the second pressing arm 32 presses the second buffer 42 to a position between the releasing position and the pressing position. In this case, the first buffer 41 plays a role of buffering and also plays a role of limiting the opening of the vacuum circuit breaker; while the second buffer 42 only serves as a buffer.

In the above-described embodiment, in the case where the first buffer 41 and the second buffer 42 are offset in the direction parallel to the axial direction of the main shaft 2, the vacuum circuit breaker can satisfy the low temperature environment application by the length difference of the first pressing arm 31 and the second pressing arm 32 or the mounting height difference of the first buffer 41 and the second buffer 42, thereby making the low temperature environment range to which the vacuum circuit breaker is applicable larger.

In some embodiments, to satisfy the installation height of the first bumper 41 being higher than the installation height of the second bumper 42, the bumper assembly 100 further includes a first pad 51 disposed between the first bumper 41 and the floor 11 and a second pad 52 disposed between the second bumper 42 and the floor 11, and the height of the first pad 51 should be greater than the height of the second pad 52.

Fig. 6 shows a cross-sectional view of a bumper 4 according to further embodiments of the present disclosure. As shown in fig. 6, the first buffer 41 and the second buffer 42 have the same structure. The buffer 4 has a buffer chamber 431 provided in a housing, and the buffer chamber 431 is filled with hydraulic oil 432 and provided with a reset member 45. One end of the restoring member 45 is disposed at an inner bottom surface of the buffer chamber 431, and the other end of the restoring member 45 is connected to the moving member 44. The moving member 44 is movable within the buffer chamber 431 to switch between a release position and a pressing position, wherein in the case where the moving member 44 is switched from the release position to the pressing position, the moving member 44 presses the reset member 45 and compresses the reset member 45; while the return member 45 drives the moving member 44 to switch from the pressing position to the release position in the case where the return member 45 releases the energy.

The reset member 45 according to embodiments of the present disclosure may be any of a variety of types of reset members 45 currently known or available in the future, as embodiments of the present disclosure are not limited in this regard. For example, in some embodiments, the return 45 may be a return spring.

With continued reference to fig. 6, in some embodiments, the buffer chamber 431 is filled with hydraulic oil 432, and when the moving member 44 is switched from the release position to the pressing position, the moving member 44 compresses the hydraulic oil 432, thereby increasing motion damping during the opening process of the vacuum circuit breaker and reducing the opening rebound amplitude of the vacuum circuit breaker. Obviously, in a low temperature environment, the hydraulic oil 432 is affected by a low temperature to cause a strong damping effect thereof, and thus the buffer chamber 431 includes a vacuum chamber, that is, the buffer chamber 431 performs a vacuuming operation before the hydraulic oil 432 is injected, and then the hydraulic oil 432 is injected, thereby preventing the hydraulic oil 432 from being affected by a low temperature.

With continued reference to fig. 6, in some embodiments, the mover 44 includes a piston rod 441 and a piston 442. A part of the piston rod 441 is located outside the housing, and the piston rod 441 located outside the housing can be in contact with the pressing arm 3. A further part of the piston rod 441 is located inside the housing and within the buffer chamber 431, the piston rod 441 located within the buffer chamber 431 being able to be in contact with the piston 442. The piston 442 is also located in the buffer chamber 431, and the other end of the piston 442 is connected to the restoring element 45, the piston rod 441 being able to drive the piston 442 to move in the buffer chamber 431, wherein the piston 442 presses the hydraulic oil 432 and can press the restoring element 45, when the piston rod 441 is able to drive the piston 442 to move downward.

Embodiments of the present disclosure also provide a vacuum circuit breaker including: a damper assembly 100 according to any one of the first aspects of the present disclosure; and an actuating assembly, one end of which is connected with the spindle 2 of the damper assembly 100, and the other end of which is connected with the contact assembly. Obviously, in the case that the main shaft 2 is in the closing position, the actuating assembly controls the contact assembly and connects the contact assembly, so as to close the vacuum circuit breaker; while in the case of the main shaft 2 being in the opening position, the actuating assembly controls the contact assembly and opens the contact assembly, thereby opening the vacuum circuit breaker.

The snubber assembly 100 according to the embodiment of the present disclosure may be applied to various vacuum circuit breakers to satisfy the application of the vacuum circuit breakers in low temperature environments. It should be appreciated that the damper assembly 100 according to embodiments of the present disclosure may also be applied to other electrical components, as well, embodiments of the present disclosure are not limited in this regard.

The foregoing description of the embodiments of the present disclosure has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the technical improvement in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims (11)

1. A damper assembly (100), the damper assembly (100) comprising:

A main shaft (2) rotatable to switch between a closing position and a opening position;

A pair of pressing arms (3) provided on the spindle (2) and rotatable together with the spindle (2); and

-A pair of buffers (4) arranged in correspondence with the pair of pressing arms (3), each buffer (4) of the pair of buffers (4) comprising a moving member (44) switchable between a release position and a pressing position, wherein in case of the spindle (2) being in the closing position, the moving member (44) of each buffer (4) is spaced apart from the respective pressing arm (3) and in the release position, and in case of the spindle (2) being switched from the closing position to the opening position, the spindle (2) is able to bring the pair of pressing arms (3) into rotation to press the moving member (44) of the pair of buffers (4), and in case of one of the moving members (44) being pressed by the respective pressing arm (3) to the pressing position, the other moving member (44) is pressed by the respective pressing arm (3) to a position between the release position and the pressing position.

2. Buffer assembly (100) according to claim 1, wherein the pair of buffers (4) comprises a first buffer (41) and a second buffer (42), the pair of pressing arms (3) comprises a first pressing arm (31) and a second pressing arm (32), the first pressing arm (31) and the second pressing arm (32) being arranged on the spindle (2) and spaced apart, wherein during switching of the spindle (2) from the closing position to the opening position the first pressing arm (31) presses the moving part (44) of the first buffer (41) and the second pressing arm (32) presses the moving part (44) of the second buffer (42).

3. The damper assembly (100) according to claim 2, wherein the damper assembly (100) further comprises a housing (1), the first damper (41) and the second damper (42) being arranged on a floor (11) of the housing (1), wherein the distance of the moving member (44) of the first damper (41) from the floor (11) is greater than the distance of the moving member (44) of the second damper (42) from the floor (11) with the moving member (44) in the release position.

4. A damper assembly (100) according to claim 3, wherein the first damper (41) and the second damper (42) are staggered or aligned along a direction parallel to the axial direction of the spindle (2).

5. The damper assembly (100) according to claim 4, wherein, in a case where the first damper (41) and the second damper (42) are staggered in a direction parallel to the axial direction of the spindle (2), the first damper (41) is closer to the spindle (2) than the second damper (42), and the length of the first pressing arm (31) is smaller than the length of the second pressing arm (32).

6. The damper assembly (100) according to claim 5, wherein the second pressing arm (32) contacts the moving member (44) of the second damper (42) with the first pressing arm (31) contacting the moving member (44) of the first damper (41); or alternatively

The second pressing arm (32) is spaced apart from the moving member (44) of the second bumper (42) with the first pressing arm (31) contacting the moving member (44) of the first bumper (41).

7. The damper assembly (100) according to claim 4, wherein, with the first damper (41) and the second damper (42) aligned in a direction parallel to the axial direction of the spindle (2), the length of the first pressing arm (31) is equal to the length of the second pressing arm (32), such that the second pressing arm (32) is spaced apart from the moving member (44) of the second damper (42) with the first pressing arm (31) contacting the moving member (44) of the first damper (41).

8. A bumper assembly (100) according to claim 3, wherein the bumper assembly (100) further comprises a first pad (51) disposed between the first bumper (41) and the floor (11) and a second pad (52) disposed between the second bumper (42) and the floor (11), and wherein the first pad (51) has a height greater than the second pad (52).

9. The damper assembly (100) of claim 2, wherein the damper (4) further comprises a damper chamber (431), the mover (44) being movable within the damper chamber (431) to switch between the release position and the pressing position.

10. The damper assembly (100) of claim 9, wherein the damper (4) further comprises a hydraulic oil (432) disposed within the damper chamber (431), and the damper chamber (431) comprises a vacuum chamber.

11. A vacuum circuit breaker, characterized in that the vacuum circuit breaker comprises:

The damper assembly (100) of any one of claims 1 to 10; and

And one end of the execution assembly is connected with the main shaft (2) of the buffer assembly (100), and the other end of the execution assembly is connected with the contact assembly.