CN210039972U

CN210039972U - Oil buffer and circuit breaker with same

Info

Publication number: CN210039972U
Application number: CN201921407867.3U
Authority: CN
Inventors: 陈俊朴
Original assignee: Chengdu Huachuan Electric Parts Co Ltd
Current assignee: Chengdu Huachuan Electric Parts Co Ltd
Priority date: 2019-08-27
Filing date: 2019-08-27
Publication date: 2020-02-07
Anticipated expiration: 2029-08-27

Abstract

The utility model discloses an oil buffer, including cylinder body, movable rod and supporting sleeve, the supporting sleeve is located the cylinder body, and the oral area of cylinder body is provided with the positioning mechanism who is used for advancing the location to the supporting sleeve, movable rod and supporting sleeve sliding fit, and the movable rod is located and is provided with the spring between the bottom of the inside one end of cylinder body and cylinder body, and the movable rod is located and is provided with the buffer oil in the cavity between the inside one end of cylinder body and the cylinder body bottom, be provided with first elastic sealing cover and sealing washer between the outer wall of supporting sleeve and the inner wall of cylinder body, be provided with sealed the pad between the terminal surface of supporting sleeve and the positioning mechanism, be provided with second elastic sealing cover between the inner wall of supporting sleeve and the movable rod. Through adopting above-mentioned multiple seal structure, can improve sealed effect effectively, prevent that buffer oil from revealing. Also disclosed is a circuit breaker having an oil damper, which can improve the service life of the circuit breaker.

Description

Oil buffer and circuit breaker with same

Technical Field

The utility model relates to a buffer device field, concretely relates to oil buffer and have circuit breaker of oil buffer.

Background

In order to realize the rapid braking of a moving object with high speed or large mass without damaging the moving object, buffering is needed. The oil buffer has stable performance, high efficiency, long service life and no bounce, so the oil buffer is more commonly used. For example, in a medium-and high-voltage circuit breaker, in order to solve the problem of buffering at a high opening speed (which is required for reliably breaking a current), a method of performing long buffering by using an oil buffer is adopted, and the opening speed is significantly reduced in the latter half of the stroke, so that good motion characteristics are obtained. Current oil buffer can refer to application number 201620399384.3's utility model patent, and this kind of oil buffer adopts two sealing washers to seal, and the leakproofness is not enough good, easy oil leak.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a stronger oil buffer of leakproofness is provided, still provides a circuit breaker with oil buffer, can cushion effectively when the circuit breaker separating brake, prolongs the life of circuit breaker.

The utility model provides a technical scheme that technical problem adopted is: the oil buffer comprises a cylinder body, a movable rod and a supporting sleeve, wherein the supporting sleeve is located in the cylinder body, a positioning mechanism used for positioning the supporting sleeve is arranged at the opening of the cylinder body, the movable rod is in sliding fit with the supporting sleeve, a spring is arranged between one end of the movable rod, which is located inside the cylinder body, and the bottom of the cylinder body, a buffer oil is arranged in a cavity between one end of the movable rod, which is located inside the cylinder body, and the bottom of the cylinder body, a first elastic sealing sleeve and a sealing ring are arranged between the outer wall of the supporting sleeve and the inner wall of the cylinder body, a sealing gasket is arranged between the end face of the supporting sleeve and the positioning mechanism, and a second elastic sealing sleeve is arranged between.

Furthermore, the hole of supporting sleeve has annular fender ring, the outer wall of movable rod is provided with the location boss, movable rod and fender ring sliding fit, and the location boss is located the fender ring and is close to one side of cylinder body bottom and with fender ring pressing contact.

Furthermore, the second elastic sealing sleeve is arranged on one side of the baffle ring close to the opening of the cylinder body.

Furthermore, the outer wall of one end of the movable rod close to the bottom of the cylinder body is provided with a positioning ring, a shaft sleeve is arranged between the positioning ring and the positioning boss, the inner wall of the shaft sleeve is in sliding fit with the movable rod, and the outer wall of the shaft sleeve is in sliding fit with the inner wall of the supporting sleeve.

Further, the one end that the movable rod is close to the cylinder body bottom is provided with the spring hole, and the cylinder body bottom is provided with the spring mounting groove, the one end of spring is arranged in the spring hole, and the other end is arranged in the spring mounting groove.

Furthermore, the outer wall of the supporting sleeve is provided with two annular sealing grooves, and the first elastic sealing sleeve and the sealing ring are respectively positioned in one sealing groove.

Furthermore, the first elastic sealing sleeve is a sponge sleeve, the sealing ring is an O-shaped ring, and the second elastic sealing sleeve is a rubber sleeve.

Further, positioning mechanism is an arc elastic ring, the both ends of elastic ring are provided with the operation ear of band-pass hole, the inner wall of cylinder body is provided with annular constant head tank, the constant head tank is gone into to the outer fringe card of elastic ring.

The circuit breaker with the oil buffer comprises a circuit breaker body and a buffer seat, wherein the oil buffer is fixedly arranged on the buffer seat, and the oil buffer adopts the oil buffer.

Furthermore, a plurality of positioning holes are formed in the buffer seat, the oil buffers are multiple, and the cylinder body of each oil buffer is located in one positioning hole.

Compared with the prior art, the beneficial effects of the utility model are that: the first elastic sealing sleeve and the sealing ring are used for sealing between the outer wall of the supporting sleeve and the cylinder body, so that buffer oil is prevented from leaking between the supporting sleeve and the inner wall of the cylinder body; the second elastic sealing sleeve is used for sealing between the inner wall of the supporting sleeve and the movable rod, so that buffer oil is prevented from leaking from a fit clearance between the inner wall of the supporting sleeve and the movable rod, the sealing gasket plays a role in auxiliary sealing, and the sealing effect is enhanced. Through adopting above-mentioned multiple seal structure, can improve sealed effect effectively, prevent that buffer oil from revealing.

Drawings

FIG. 1 is a schematic view of an oil buffer;

FIG. 2 is a schematic view of a positioning mechanism of the oil damper;

FIG. 3 is a schematic diagram of a circuit breaker with an oil buffer;

reference numerals: 1, a cylinder body; 2-a movable rod; 21, positioning a boss; 22-a positioning ring; 23-shaft sleeve; 3, a supporting sleeve; 31-a baffle ring; 4-a spring; 5-buffer oil; 6-a first elastic sealing sleeve; 7, sealing rings; 8, sealing gaskets; 9-a second elastic sealing sleeve; 10-an elastic ring; 100-a circuit breaker body; 200-a buffer seat; 300-oil buffer.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

As shown in fig. 1, the utility model discloses an oil buffer, including cylinder body 1, movable rod 2 and supporting sleeve 3, supporting sleeve 3 is located cylinder body 1, and the oral area of cylinder body 1 is provided with and is used for carrying out the positioning mechanism who fixes a position supporting sleeve 3, movable rod 2 and 3 sliding fit of supporting sleeve, and movable rod 2 is provided with spring 4 between the bottom of the inside one end of cylinder body 1 and cylinder body 1, and movable rod 2 is located and is provided with buffer oil 5 in the cavity between the inside one end of cylinder body 1 and the cylinder body 1 bottom, be provided with first elastic sealing cover 6 and sealing washer 7 between the outer wall of supporting sleeve 3 and the inner wall of cylinder body 1, be provided with sealed pad 8 between the terminal surface of supporting sleeve 3 and the positioning mechanism, be provided with second elastic sealing cover 9 between the inner wall of supporting sleeve 3 and the movable rod 2.

The cylinder body 1 is cylindrical in shape, and one end is an open mouth. One end of the movable rod 2 is positioned in the cylinder body 1, and the other end is positioned outside the cylinder body and is used for transmitting the kinetic energy of the moving object to the buffer oil 5 and the spring 4 in the cylinder body 1. The supporting sleeve 3 is used for guiding and positioning the movable rod 2, the supporting sleeve 3 is in sliding fit with the movable rod 2, the movable rod 2 can move along the axial direction, meanwhile, the fit clearance between the supporting sleeve 3 and the movable rod 2 is small as much as possible, and good sealing performance is guaranteed. The supporting sleeve 3 is integrally positioned inside the cylinder body 1, the inner end of the supporting sleeve is attached to the bottom of the cylinder body 1, and the outer end of the supporting sleeve is pressed by the positioning mechanism and the sealing gasket 8 so as to be kept fixed. The spring 4 is a conventional spring, the buffer oil 5 is ordinary hydraulic oil, and the buffer oil play a buffering role at the same time. First elastic sealing sleeve 6 and second elastic sealing sleeve 9 are different from sealing washer 7, compare with sealing washer 7, and first elastic sealing sleeve 6 and second elastic sealing sleeve 9 have longer axial length, and have sufficient thickness, and have great sealed face, can guarantee sealed effect.

The first elastic sealing sleeve 6 and the sealing ring 7 are used for sealing between the outer wall of the supporting sleeve 3 and the cylinder body 1, and buffer oil 5 is prevented from leaking from the space between the supporting sleeve 3 and the inner wall of the cylinder body 1; the second elastic sealing sleeve 9 is used for sealing between the inner wall of the supporting sleeve 3 and the movable rod 2, so that the buffer oil 5 is prevented from leaking out of a fit clearance between the inner wall of the supporting sleeve 3 and the movable rod 2, and the sealing gasket 8 plays a role in auxiliary sealing and enhances the sealing effect. Through adopting above-mentioned multiple seal structure, can improve sealed effect effectively, prevent that buffer oil from revealing.

Supporting sleeve 3 has central through-hole, the inner wall of supporting sleeve 3 has bellied annular fender ring 31 of circle, the outer wall of movable rod 2 is provided with location boss 21, movable rod 2 and fender ring 31 sliding fit, and location boss 21 is located and keeps off one side that ring 31 is close to 1 bottom of cylinder body and keeps off ring 31 pressure tight contact. The spring 4 is always in a compressed state and has certain elastic force, the elastic force is transmitted to the movable rod 2, and the positioning boss 21 on the movable rod 2 is pressed to the side face of the stop ring 31, so that the movable rod 2 is kept fixed in a non-working state.

After the inner wall of the supporting sleeve 3 is provided with the convex baffle ring 31, the diameter of the inner hole of the supporting sleeve 3 at the two sides of the baffle ring 31 is larger than the inner diameter of the baffle ring 31, namely, a cavity is arranged between the baffle ring 31 and the outer end of the supporting sleeve 3, therefore, the second elastic sealing sleeve 9 is arranged at one side of the baffle ring 31 close to the opening part of the cylinder body 1, the second elastic sealing sleeve 9 is positioned in the cavity between the baffle ring 31 and the outer end of the supporting sleeve 3, and the space in the cylinder body 1 is fully utilized.

Because the axial length of fender ring 31 is limited, the movable rod 2 is shorter with the cooperation length of fender ring 31, moves steadily in order to guarantee movable rod 2, the outer wall that the one end of movable rod 2 is close to 1 bottom of cylinder body is provided with holding ring 22, be provided with axle sleeve 23 between holding ring 22 and the location boss 21, the inner wall and the 2 sliding fit of movable rod of axle sleeve 23, the outer wall of axle sleeve 23 and the inner wall sliding fit of supporting sleeve 3. The positioning ring 22 and the positioning boss 21 position the shaft sleeve 23, and ensure that the shaft sleeve 23 is always positioned between the positioning ring 22 and the positioning boss 21. Because the inner wall and the movable rod 2 sliding fit of axle sleeve 23, the outer wall of axle sleeve 23 and the inner wall sliding fit of cylinder body 1, when movable rod 2 removed, axle sleeve 23 can play the effect of direction and location to movable rod 2, guarantee the stability of movable rod 2 motion, in addition, axle sleeve 23 also can the axial slip, because buffer oil 5 not only has the cushioning effect, lubricating action still has, can reduce the sliding friction power between movable rod 2 and the axle sleeve 23 and between axle sleeve 23 and the supporting sleeve 3, slow down the wearing and tearing speed of part, and the service life is prolonged.

Spring 4 can adopt current conventional mounting means, if adopt the spring holder to install, preferably, in order to guarantee the stability of spring 4 installation, reduces the complexity of structure simultaneously, the one end that movable rod 2 is close to 1 bottom of cylinder body is provided with the spring hole, and 1 bottom of cylinder body is provided with spring mounting groove, the one end of spring 4 is arranged in the spring hole, and the other end is arranged in spring mounting groove. Spring mounting groove and spring hole radial cross-section all are circular, and its diameter and spring 4's external diameter adaptation guarantee to fix a position spring 4 steadily.

First elastic sealing cover 6 and sealing washer 7 can imbed 1 inner wall of cylinder body, and for the convenience of installation, it is preferred, the outer wall of supporting sleeve 3 is provided with two annular seal grooves of circle, first elastic sealing cover 6 and sealing washer 7 are located a seal groove respectively. First elastic sealing sleeve 6 and sealing washer 7 all with seal groove and 1 interference fit of cylinder body, extrude first elastic sealing sleeve 6 and sealing washer 7, make first elastic sealing sleeve 6 and sealing washer 7 produce elastic deformation, guarantee that first elastic sealing sleeve 6 and sealing washer 7 paste tight cylinder body 1 to play good sealed effect.

The first elastic sealing sleeve 6, the second elastic sealing sleeve 9 and the sealing gasket 8 can adopt the existing elastic sealing materials, and as the preferred technical scheme: the first elastic sealing sleeve 6 is a sponge sleeve, the sealing ring 7 is an O-shaped ring, and the second elastic sealing sleeve 9 is a rubber sleeve.

Positioning mechanism can be the annular locating plate of circle, and locating plate accessible screw thread, locating pin are connected etc. and are connected with cylinder body 1 as long as can compress tightly cylinder body 1 can, preferred, as shown in fig. 2, positioning mechanism is a curved elastic ring 10, and elastic ring 10 can adopt spring steel material, the both ends of elastic ring 10 are provided with the operating ear of band-pass hole, the inner wall of cylinder body 1 is provided with annular constant head tank, the constant head tank is gone into to the outer fringe card of elastic ring 10. The external diameter of elastic ring 10 is greater than the internal diameter of cylinder body 1, and the internal diameter is less than the internal diameter of cylinder body 1, and during the installation, two operation ears of pulling move in opposite directions, make elastic ring 10's external diameter diminish, then aim at the constant head tank with elastic ring 10, loosen two operation ears, elastic ring 10 restores original state under the effect of self elasticity, and simultaneously, the constant head tank is gone into to the outer fringe card of elastic ring 10, and the inner edge is located outside the constant head tank and compresses tightly sealed 8.

The utility model discloses oil buffer's volume can be very little, and the external diameter of cylinder body 1 can reach 22mm, and the total length can be low to 40mm, and the range of application is more extensive.

As shown in fig. 3, the circuit breaker with the oil damper includes a circuit breaker body 100 and a damper base 200, wherein the oil damper 300 is fixedly disposed on the damper base 200, and the oil damper 300 is the oil damper as described above. Breaker body 100 is current various circuit breakers, according to the breaker body 100 separating brake motion condition, fixes buffer seat 200 at breaker body 100 fixed mounting, can promote movable rod 2 and remove towards 1 bottom of cylinder body when guaranteeing breaker body 100 separating brake to transmit kinetic energy to 1 inside buffer oil 5 of cylinder body and spring 4, thereby prevent that breaker body 100 from frequently receiving great impact and life is not up to standard.

The oil damper 300 may be fixedly mounted on the damper base 200 by bolts, etc., and preferably, a plurality of positioning holes are formed in the damper base 200, the damping effect may be enhanced by the plurality of oil dampers 300, and the cylinder body 1 of each oil damper 300 is positioned in one of the positioning holes.

Claims

1. Oil buffer, including cylinder body (1), movable rod (2) and supporting sleeve (3), supporting sleeve (3) are located cylinder body (1), and the oral area of cylinder body (1) is provided with the positioning mechanism who is used for fixing a position supporting sleeve (3), movable rod (2) and supporting sleeve (3) sliding fit, and movable rod (2) are located and are provided with spring (4) between the bottom of cylinder body (1) and the inside one end of cylinder body (1), and movable rod (2) are located and are provided with in the cavity between the inside one end of cylinder body (1) and cylinder body (1) bottom and cushion oil (5), its characterized in that, be provided with first elasticity seal cover (6) and sealing washer (7) between the outer wall of supporting sleeve (3) and the inner wall of cylinder body seal cover (1), be provided with sealed pad (8) between the terminal surface of supporting sleeve (3) and the positioning mechanism, be provided with second elasticity seal cover (9) between the inner wall of supporting sleeve (3) and movable rod (2) .

2. An oil damper according to claim 1, characterized in that the inner hole of the supporting sleeve (3) is provided with a ring-shaped baffle ring (31), the outer wall of the movable rod (2) is provided with a positioning boss (21), the movable rod (2) is in sliding fit with the baffle ring (31), and the positioning boss (21) is positioned on one side of the baffle ring (31) close to the bottom of the cylinder body (1) and is in pressing contact with the baffle ring (31).

3. An oil damper according to claim 2, characterized in that the second elastic sealing sleeve (9) is arranged on the side of the baffle ring (31) close to the mouth of the cylinder (1).

4. An oil damper according to claim 2, characterized in that the outer wall of the end of the movable rod (2) close to the bottom of the cylinder body (1) is provided with a positioning ring (22), a shaft sleeve (23) is arranged between the positioning ring (22) and the positioning boss (21), the inner wall of the shaft sleeve (23) is in sliding fit with the movable rod (2), and the outer wall of the shaft sleeve (23) is in sliding fit with the inner wall of the supporting sleeve (3).

5. An oil damper according to claim 1, characterized in that one end of the movable rod (2) close to the bottom of the cylinder body (1) is provided with a spring hole, the bottom of the cylinder body (1) is provided with a spring mounting groove, one end of the spring (4) is positioned in the spring hole, and the other end is positioned in the spring mounting groove.

6. An oil buffer according to claim 1, characterized in that the outer wall of the bearing sleeve (3) is provided with two annular sealing grooves, and the first elastic sealing sleeve (6) and the sealing ring (7) are respectively located in one sealing groove.

7. An oil buffer according to claim 1, characterized in that the first elastic sealing sleeve (6) is a sponge sleeve, the sealing ring (7) is an O-ring, and the second elastic sealing sleeve (9) is a rubber sleeve.

8. An oil damper according to claim 1, characterized in that the positioning mechanism is an arc-shaped elastic ring (10), two ends of the elastic ring (10) are provided with operating lugs with through holes, the inner wall of the cylinder body (1) is provided with annular positioning grooves, and the outer edge of the elastic ring (10) is clamped into the positioning grooves.

9. The circuit breaker with the oil buffer comprises a circuit breaker body (100) and a buffer base (200), wherein the buffer base (200) is fixedly provided with the oil buffer (300), and the oil buffer (300) is characterized in that the oil buffer according to any one of claims 1 to 8 is adopted.

10. The circuit breaker with an oil damper according to claim 9, wherein a plurality of positioning holes are provided on the damper base (200), the oil damper (300) is plural, and the cylinder (1) of each oil damper (300) is located in a positioning hole.