CN108571569B - Chassis carriage and screw nut mechanism of circuit breaker - Google Patents
Chassis carriage and screw nut mechanism of circuit breaker Download PDFInfo
- Publication number
- CN108571569B CN108571569B CN201810573920.0A CN201810573920A CN108571569B CN 108571569 B CN108571569 B CN 108571569B CN 201810573920 A CN201810573920 A CN 201810573920A CN 108571569 B CN108571569 B CN 108571569B
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- CN
- China
- Prior art keywords
- nut
- chassis
- mounting seat
- circuit breaker
- mounting hole
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Links
- 230000033001 locomotion Effects 0.000 claims description 4
- 238000012360 testing method Methods 0.000 abstract description 10
- 238000000034 method Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000003754 machining Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B11/00—Switchgear having carriage withdrawable for isolation
- H02B11/12—Switchgear having carriage withdrawable for isolation with isolation by horizontal withdrawal
- H02B11/167—Switchgear having carriage withdrawable for isolation with isolation by horizontal withdrawal truck type
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Trip Switchboards (AREA)
Abstract
The invention relates to a chassis truck and a screw nut mechanism of a circuit breaker. The chassis truck of the circuit breaker comprises an end beam and a chassis, wherein a screw rod is fixed on the end beam, a nut mounting seat is fixed on the chassis, a mounting hole is formed in the nut mounting seat, a nut matched with the screw rod is rotationally assembled in the mounting hole, the nut is further matched with the mounting hole in a guiding and moving mode along the axis direction of the mounting hole, and the chassis truck of the circuit breaker further comprises a locking mechanism used for locking and fixing the nut on the nut mounting seat. Under the condition that the chassis truck can not accurately reach the working and test positions, the angle of the round nut is finely adjusted to enable the nut to axially move along the screw rod, and after the nut moves in place, the chassis truck is accurately moved to the working and test positions, so that the chassis truck is reasonable in structure and meets the requirements of electrical equipment on safety and reliability.
Description
Technical Field
The invention relates to a chassis truck and a screw nut mechanism of a circuit breaker.
Background
At present, the electric power system is widely applied to a switch cabinet, and a breaker in the switch cabinet is an important element for cutting off and switching on a circuit of the electric power system. In the prior art, the circuit breaker comprises circuit breaker body and the chassis car that bears its in cubical switchboard internal motion, chassis car dress is in the circuit breaker bottom, as shown in fig. 1 through 3, chassis car includes chassis 4, end beam 1, lead screw 3 and nut a2, be equipped with the mounting hole that is used for installing lead screw 3 on the end beam 1, on the stand of cubical switchboard cabinet door department both sides is gone into to end beam 1 card, lead screw 3 is fixed in the mounting hole of end beam, can rotate, nut a2 is fixed on the vertical lateral wall of establishing in chassis rear end, lead screw 3 passes nut a2 and forms lead screw nut mechanism, lead screw nut mechanism decides initial state and the state of putting in place of chassis car, play vital function to the operation of circuit breaker in the cabinet. When the circuit breaker works, the screw rod 3 is rotated clockwise, the chassis leaves the end beam 1, the body of the circuit breaker is carried into the switch cabinet to reach the working position, and the circuit breaker is interlocked and the secondary circuit acts; the screw rod 3 is rotated anticlockwise, the chassis bears the weight of the breaker body to return to the test position from the working position, and when the chassis is clung to the end beam 1, the breaker is interlocked and the secondary circuit acts relatively, so that the breaker can be withdrawn from the switch cabinet.
In addition, chinese patent with bulletin number CN206742730U and bulletin day 2017.12.12 discloses a circuit breaker chassis, which comprises a frame, an end beam and a driving mechanism for driving the frame to horizontally move relative to the end beam, wherein the driving mechanism is a screw nut mechanism, a guiding device capable of keeping the frame to linearly move is arranged between the frame and the end beam, and the left side and the right side of the frame can be prevented from swinging in the horizontal direction in the process of driving the screw by the handle.
In the prior art, after a screw rod of a screw rod nut mechanism on a chassis truck of a circuit breaker is matched with a screw rod, adjustment cannot be generally carried out, screw thread starting points of the screw rod and the screw rod are required to be quite accurate, and processing precision requirements are high, otherwise, problems of incapacity of entering and exiting the chassis truck, related interlocking failure of the circuit breaker, unreliable secondary circuit and the like can be caused, and safety and reliability required by power equipment cannot be met. In addition, the screw nut mechanism has similar problems in other fields as a transmission mechanism.
Disclosure of Invention
The invention aims to provide a chassis truck of a circuit breaker, which solves the problem that a screw rod of a screw rod nut mechanism of the chassis truck of the circuit breaker in the prior art cannot be adjusted after being matched with a nut; the invention also aims to provide a screw nut mechanism.
In order to achieve the above purpose, the technical scheme of the chassis truck of the circuit breaker is as follows: the chassis truck of the circuit breaker comprises an end beam and a chassis, wherein a screw rod is fixed on the end beam, a nut mounting seat is fixed on the chassis, a mounting hole is formed in the nut mounting seat, a nut matched with the screw rod is rotationally assembled in the mounting hole, the nut is further matched with the mounting hole in a guiding and moving mode along the axis direction of the mounting hole, and the chassis truck of the circuit breaker further comprises a locking mechanism used for locking and fixing the nut on the nut mounting seat.
The beneficial effects are as follows: under the condition that the chassis truck can not accurately reach the working and test positions, the angle of the round nut is finely adjusted to enable the nut to axially move along the screw rod, and after the nut moves in place, the chassis truck is accurately moved to the working and test positions, so that the chassis truck is reasonable in structure and meets the requirements of electrical equipment on safety and reliability.
The nut is provided with positioning holes at intervals along the circumferential direction, and the locking mechanism is a threaded fastener which is inserted into the nut mounting seat from outside to inside and forms positioning fit with the positioning holes.
The threaded fastener is two screws arranged on the circumferential side wall of the nut mounting seat, and threaded holes or counter bores matched with the screws in a positioning mode are formed in the outer circumferential surface of the nut at intervals.
The beneficial effects are as follows: the locking mode is adopted, the structure is simple, the disassembly and the assembly are convenient, and the nut is convenient to adjust by operators.
The nut mounting seat is provided with a stop structure, and two ends of the nut are respectively matched with the chassis and the stop structure along the axial stop of the chassis and the stop structure.
The beneficial effects are as follows: in the process of rotating the adjusting nut, the nut moves along the axial direction of the screw rod to drive the chassis truck to move so that the chassis truck accurately reaches the working and testing positions, and the operation is more convenient.
The nut comprises a nut body, one end of the nut body is provided with an annular bulge with the radial dimension smaller than that of the nut body, a ring platform is formed between the annular bulge and the nut body, the mounting hole is a stepped hole, the stop structure is a stop step formed by the stepped hole, and the ring platform is in axial stop fit with the stop step.
The technical scheme of the screw nut mechanism is as follows: the screw-nut mechanism comprises a screw and a screw mounting seat, and further comprises a nut mounting seat used for being fixedly connected with a moving part, a mounting hole is formed in the nut mounting seat, a nut matched with the screw is rotationally assembled in the mounting hole, the nut is further matched with the mounting hole in a guiding and moving mode along the axis direction of the mounting hole, and the screw-nut mechanism further comprises a locking mechanism used for locking and fixing the nut on the nut mounting seat.
The nut is provided with positioning holes at intervals along the circumferential direction, and the locking mechanism is a threaded fastener which is inserted into the nut mounting seat from outside to inside and forms positioning fit with the positioning holes.
The threaded fastener is two screws arranged on the circumferential side wall of the nut mounting seat, and threaded holes or counter bores matched with the screws in a positioning mode are formed in the outer circumferential surface of the nut at intervals.
The nut mounting seat is provided with a stop structure which is used for being matched with the nut along the axial stop of the nut.
The nut comprises a nut body, one end of the nut body is provided with an annular bulge with the radial dimension smaller than that of the nut body, a ring platform is formed between the annular bulge and the nut body, the mounting hole is a stepped hole, the stop structure is a stop step formed by the stepped hole, and the ring platform is in axial stop fit with the stop step.
Drawings
Fig. 1 is a schematic structural view of a chassis of a circuit breaker in the prior art;
FIG. 2 is a schematic view of the structure of the lead screw of the chassis shown in FIG. 1;
FIG. 3 is a schematic view of a nut of the chassis of FIG. 1;
fig. 4 is a schematic structural view of embodiment 1 of the chassis of the circuit breaker of the present invention;
FIG. 5 is an enlarged view of a portion of FIG. 4A;
fig. 6 is a schematic structural view of a nut mount of a chassis of the circuit breaker shown in fig. 4;
fig. 7 is a schematic structural view of a nut of a chassis of the circuit breaker shown in fig. 4.
Reference numerals illustrate: 1. an end beam; 2. a nut a;3. a screw rod; 4. a chassis; 5. a nut mounting seat; 51. a stepped hole; 6. a nut b;61. countersink; 62. an annular protrusion; 621. a square groove; 7. and (5) a screw.
Detailed Description
Embodiments of the present invention will be further described with reference to the accompanying drawings.
In the chassis vehicle embodiment 1 of the circuit breaker, as shown in fig. 4 to 7, the chassis vehicle of the circuit breaker comprises an end beam 1, a chassis 4, a lead screw 3 and a nut b6, a nut mounting seat 5 is fixed on the chassis 4, the nut mounting seat 5 is fixed on a side wall erected at the rear end of the chassis 4 through bolts, a mounting hole is arranged in the nut mounting seat 5, a nut b6 matched with the lead screw 3 is rotationally assembled in the mounting hole, the axis of the nut b6 (namely, the axis of a thread of the nut b 6) coincides with the axis of the mounting hole, the nut b6 is guided to move and matched with the mounting hole along the extending direction of the axis of the nut b6, the lead screw 3 and the nut b6 form a lead screw and nut mechanism, and the chassis vehicle of the circuit breaker further comprises a locking mechanism for locking and fixing the nut b6 into the nut mounting seat 5.
In this embodiment, a stop structure is further disposed on the nut mounting seat 5, two ends of the nut b6 are respectively matched with the chassis 4 and the stop structure along the axial direction thereof, the nut b6 includes a nut body, the nut body is in a cylindrical structure, an operation end for an operator to rotate the nut b6 is disposed at one end of the nut body, the operation end is an annular protrusion 62 disposed on the end face of the nut, the radial dimension of the annular protrusion 62 is smaller than that of the nut body, a ring table is formed between the annular protrusion 62 and the nut body, the mounting hole is a stepped hole 51, the stop structure is a stop step formed by the stepped hole 51, the nut body is mounted in a large-diameter section of the stepped hole 51, the annular protrusion 62 extends out of the nut mounting seat 5 from a small-diameter section of the stepped hole 51, and the ring table is matched with the stop step along the axial direction of the nut b 6. Square grooves 621 are provided at intervals on the outer peripheral surface of the annular projection 62.
In this embodiment, a plurality of positioning holes are formed in the nut b6 at intervals along the circumferential direction, the locking mechanism is a threaded fastener inserted into the nut mounting seat 5 from outside to inside and forming positioning fit with the positioning holes, threaded holes for mounting the screws 7 are formed in the circumferential side wall of the nut mounting seat 5, two threaded holes are formed in the circumferential side wall of the nut mounting seat 5, the threaded fasteners are screws 7 inserted into the threaded holes, and the positioning holes are counter bores 61 uniformly distributed on the outer circumferential surface of the nut b 6.
In the use process of the embodiment, the end beams 1 of the chassis truck are clamped into the upright posts on two sides of the switch cabinet, the nut mounting seat 5 is fixed on the side wall erected on the rear end of the chassis 4, the nut b6 is mounted in the stepped hole 51 of the nut mounting seat 5, the nut b6 and the nut mounting seat 5 are fixed together by the screw 7, and the screw rod 3 extends into and is fixed on the end beams 1 and penetrates through the nut.
During the process of operating the chassis, if it is found that the screw 3 and the nut b6 cannot accurately reach the working and test positions due to the problem of machining precision, the screw 7 on the nut mount 5 can be loosened, the square groove 621 on the annular protrusion 62 is rotated by a special tool (such as a wrench), and at this time, the nut b6 and the nut mount 5 are in a loosened state, that is, the nut b6 can rotate relative to the axis of the nut mount 5, but the two still maintain a guiding and rotating fit relationship. The nut b6 is finely adjusted, as the nut 6 is matched with the screw rod 3, and the two ends of the nut are respectively matched with the stop step in the mounting hole and the chassis 4 along the axial stop of the nut, the chassis vehicle can be driven to axially move in the process of adjusting the nut b6, and the nut b6 is fixed on the nut mounting seat 5 through the screw 7 after the chassis vehicle accurately reaches the working and test positions.
According to the chassis truck of the circuit breaker, errors exist in machining of thread starting points on the screw rod 3 and the nut b6, under the condition that a circuit breaker body loaded on the chassis truck cannot accurately reach a working and testing position, the nut b6 is enabled to axially move along the screw rod 3 through fine adjustment of the angle of the nut b6, the chassis truck is driven to accurately move to the working and testing position, the structure is reasonable, and requirements of electrical equipment on safety and reliability are met.
Embodiment 2 of the chassis of the circuit breaker of the present invention is different from embodiment 1 in that a stop structure is not provided on the nut mount 5, if the circuit breaker body loaded on the chassis cannot accurately reach the working position, the nut b6 moves relative to the nut mount 5 along the axial direction of the screw rod 3 in the process of adjusting, and since the nut mount 5 and the nut b6 are guided to move along the extending direction of the axis of the nut b6, the nut mount 5 does not interfere with the movement of the nut b6, and after the nut b6 moves in place, the chassis is moved to fix the nut on the nut mount 5 by the screw 7 after the screw 7 on the nut mount 5 corresponds to the counter bore 61 on the nut.
Embodiment 3 of the chassis of the circuit breaker of the invention is different from embodiment 1 in that the locking mechanism is a flange connection structure, one end of the nut body is provided with a connecting flange, a plurality of positioning holes are circumferentially arranged on the connecting flange at intervals, a bolt hole is arranged on a stop step formed by the stepped hole 51 in the nut mounting seat 5, and the nut b6 is locked and fixed in the nut mounting seat 5 by bolts inserted in the positioning holes and the bolt hole.
Embodiment 4 of the chassis of the circuit breaker of the present invention is different from embodiment 1 in that the operation end is a columnar operation handle provided on the nut body to extend in the axial direction thereof.
Embodiment 5 of the chassis of the circuit breaker of the invention is different from embodiment 1 in that the holes for installing the screws 7 on the nut installation base 5 are unthreaded holes, and the positioning holes are threaded holes arranged at intervals on the outer peripheral surface of the nut b 6.
In other embodiments, the nut is of polygonal configuration and the corresponding mounting hole is of polygonal configuration.
The embodiment of the screw nut mechanism of the present invention is the same as any of the embodiments of the screw nut mechanism in the chassis of the circuit breaker of the present invention described above, and the description thereof will not be repeated.
Claims (10)
1. Chassis car of circuit breaker, including end beam and chassis, be fixed with lead screw on the end beam, its characterized in that: the chassis is fixedly provided with a nut mounting seat, a mounting hole is formed in the nut mounting seat, a nut matched with the screw rod is rotationally assembled in the mounting hole, the nut is also matched with the mounting hole in a guiding and moving manner along the axis direction of the mounting hole, and the chassis truck of the circuit breaker further comprises a locking mechanism for locking and fixing the nut on the nut mounting seat; the nut is used for guiding movement relative to the axis direction of the nut mounting seat when the breaker body loaded on the chassis truck cannot accurately reach the working or experimental position, and driving the chassis truck to move along the axis, so that the chassis truck can accurately reach the working or experimental position.
2. The chassis of a circuit breaker of claim 1, wherein: the nut is provided with positioning holes at intervals along the circumferential direction, and the locking mechanism is a threaded fastener which is inserted into the nut mounting seat from outside to inside and forms positioning fit with the positioning holes.
3. The chassis of a circuit breaker of claim 2, wherein: the threaded fastener is two screws arranged on the circumferential side wall of the nut mounting seat, and threaded holes or counter bores matched with the screws in a positioning mode are formed in the outer circumferential surface of the nut at intervals.
4. A chassis for a circuit breaker according to claim 1 or 2 or 3, characterized in that: the nut mounting seat is provided with a stop structure, and two ends of the nut are respectively matched with the chassis and the stop structure along the axial stop of the chassis and the stop structure.
5. The chassis of the circuit breaker of claim 4, wherein: the nut comprises a nut body, one end of the nut body is provided with an annular bulge with the radial dimension smaller than that of the nut body, a ring platform is formed between the annular bulge and the nut body, the mounting hole is a stepped hole, the stop structure is a stop step formed by the stepped hole, and the ring platform is in axial stop fit with the stop step.
6. Screw nut mechanism, including lead screw and lead screw mount pad, its characterized in that: the screw nut mechanism further comprises a locking mechanism used for locking and fixing the nut on the nut mounting seat; the nut is used for guiding movement relative to the axis direction of the nut mounting seat when the breaker body loaded on the chassis truck cannot accurately reach the working or experimental position, and driving the chassis truck to move along the axis, so that the chassis truck can accurately reach the working or experimental position.
7. The lead screw nut mechanism of claim 6, wherein: the nut is provided with positioning holes at intervals along the circumferential direction, and the locking mechanism is a threaded fastener which is inserted into the nut mounting seat from outside to inside and forms positioning fit with the positioning holes.
8. The lead screw nut mechanism of claim 7, wherein: the threaded fastener is two screws arranged on the circumferential side wall of the nut mounting seat, and threaded holes or counter bores matched with the screws in a positioning mode are formed in the outer circumferential surface of the nut at intervals.
9. The lead screw nut mechanism according to claim 6 or 7 or 8, characterized in that: the nut mounting seat is provided with a stop structure which is used for being matched with the nut along the axial stop of the nut.
10. The lead screw nut mechanism of claim 9, wherein: the nut comprises a nut body, one end of the nut body is provided with an annular bulge with the radial dimension smaller than that of the nut body, a ring platform is formed between the annular bulge and the nut body, the mounting hole is a stepped hole, the stop structure is a stop step formed by the stepped hole, and the ring platform is in axial stop fit with the stop step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810573920.0A CN108571569B (en) | 2018-06-06 | 2018-06-06 | Chassis carriage and screw nut mechanism of circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810573920.0A CN108571569B (en) | 2018-06-06 | 2018-06-06 | Chassis carriage and screw nut mechanism of circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108571569A CN108571569A (en) | 2018-09-25 |
| CN108571569B true CN108571569B (en) | 2023-11-21 |
Family
ID=63573353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810573920.0A Active CN108571569B (en) | 2018-06-06 | 2018-06-06 | Chassis carriage and screw nut mechanism of circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108571569B (en) |
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| Publication number | Publication date |
|---|---|
| CN108571569A (en) | 2018-09-25 |
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