CN108631205B - Screw nut mechanism and chassis truck of circuit breaker - Google Patents
Screw nut mechanism and chassis truck of circuit breaker Download PDFInfo
- Publication number
- CN108631205B CN108631205B CN201810575276.0A CN201810575276A CN108631205B CN 108631205 B CN108631205 B CN 108631205B CN 201810575276 A CN201810575276 A CN 201810575276A CN 108631205 B CN108631205 B CN 108631205B
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- Prior art keywords
- nut
- chassis
- mounting hole
- mounting seat
- circuit breaker
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Classifications
-
- 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
-
- 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
- H02B11/02—Details
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Body Structure For Vehicles (AREA)
- Trip Switchboards (AREA)
Abstract
The invention relates to a screw nut mechanism and a chassis truck of a circuit breaker. The chassis truck of the circuit breaker comprises an end beam and a chassis, wherein an axially limited lead screw is rotationally assembled 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 lead screw is rotationally assembled in the mounting hole in an axially fixed mode, a bearing capable of bearing axial force is arranged between the nut and the mounting hole, the bearing is provided with a seat ring fixed with the mounting seat and a shaft ring fixed with the nut, the chassis truck of the circuit breaker further comprises a locking mechanism used for locking and fixing the nut on the mounting seat or the chassis, the nut is provided with an operation end extending out of the mounting hole, and the operation end is provided with a rotating matching part for an operator to rotate the nut when the locking mechanism is unlocked. The angle through the fine setting nut makes the nut follow lead screw axial displacement, drives chassis car accuracy and removes to work, test position, and is rational in infrastructure, satisfies electrical equipment to security and reliability requirement.
Description
Technical Field
The invention relates to a screw nut mechanism and a chassis truck 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 6, be equipped with the mounting hole that is used for installing lead screw 3 on the end beam 1, lead screw 3 axial spacing rotates the assembly in the mounting hole of end beam, on the stand of cubical switchboard cabinet door department both sides is gone into to end beam 1 card, nut 6 is fixed on the vertical lateral wall of establishing in chassis rear end, lead screw 3 passes nut 6 and forms lead screw nut mechanism, lead screw nut mechanism decides initial state and the target state 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 an axially limited lead screw is rotationally assembled 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 lead screw is rotationally assembled in the mounting hole in an axially fixed mode, a bearing 8 capable of bearing axial force is arranged between the nut and the mounting hole, the bearing 8 is provided with a seat ring fixed with the mounting seat and a shaft ring fixed with the nut, the chassis truck of the circuit breaker further comprises a locking mechanism used for locking and fixing the nut on the mounting seat or the chassis, the nut is provided with an operation end extending out of the mounting hole, and an operation end is provided with a rotating matching part for an operator to rotate the nut when the locking mechanism is unlocked.
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 nut is adjusted to enable the nut to axially move along the screw rod, and the nut is axially fixed in the mounting hole, so that the chassis truck can be driven to accurately move to the working and test positions in the nut moving process, the structure is reasonable, and the requirements of electrical equipment on safety and reliability are met.
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 a screw arranged on the circumferential side wall of the nut mounting seat, at least one end of the nut extends out of the shaft collar along the axial direction, and the positioning holes are threaded holes or counter bores arranged on the outer circumferential surface of the part of the nut extending out of the shaft collar at intervals.
The nut comprises a nut body, an operating end is a reducing section which is arranged on the end face of the nut body and has a radial dimension smaller than that of the nut body, a ring table is formed between the reducing section and the nut body, and the locking mechanism is a pressing cap which is inserted into the mounting hole and is pressed onto the ring table to lock and fix the nut.
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 is characterized in that the press cap is a hollow step shaft with a small front part and a large rear part, an external thread is arranged on the periphery of the small diameter section of the step shaft, an internal thread section matched with the external thread of the small diameter section of the step shaft is arranged in a backward extending mode of the mounting hole from the hole at the front end, and a rotating matching part for an operator to rotate the nut is arranged on the periphery of the front part of the large diameter section of the step shaft.
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 fixedly connected with a moving part, a mounting hole is formed in the nut mounting seat, a nut matched with the screw is fixedly rotationally assembled in the mounting hole in an axial direction, a bearing capable of bearing axial force is arranged between the nut and the mounting hole, the bearing is provided with a seat ring fixed with the mounting seat and a shaft ring fixed with the nut, a chassis truck of the circuit breaker further comprises a locking mechanism used for locking and fixing the nut onto the mounting seat or the chassis, the nut is provided with an operation end extending out of the mounting hole, and the operation end is provided with a rotation matching part for an operator to rotate the nut when the locking mechanism is unlocked.
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 a screw arranged on the circumferential side wall of the nut mounting seat, at least one end of the nut extends out of the shaft collar along the axial direction, and the positioning holes are threaded holes or counter bores arranged on the outer circumferential surface of the part of the nut extending out of the shaft collar at intervals.
The nut comprises a nut body, an operating end is a reducing section which is arranged on the end face of the nut body and has a radial dimension smaller than that of the nut body, a ring table is formed between the reducing section and the nut body, and the locking mechanism is a pressing cap which is inserted into the mounting hole and is pressed onto the ring table to lock and fix the nut.
The nut is characterized in that the press cap is a hollow step shaft with a small front part and a large rear part, an external thread is arranged on the periphery of the small diameter section of the step shaft, an internal thread section matched with the external thread of the small diameter section of the step shaft is arranged in a backward extending mode of the mounting hole from the hole at the front end, and a rotating matching part for an operator to rotate the nut is arranged on the periphery of the front part of the large diameter section of the step shaft.
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 an assembly view of the nut and nut mount of FIG. 4;
fig. 7 is a schematic structural view of a nut mount of a chassis of the circuit breaker shown in fig. 4;
fig. 8 is a schematic structural view of a nut of a chassis of the circuit breaker shown in fig. 4;
fig. 9 is an assembly view of a nut and nut mount of embodiment 2 of the chassis of the circuit breaker of the present invention.
Reference numerals illustrate: 1. an end beam; 3. a screw rod; 4. a chassis; 5. a nut mounting seat; 51. a mounting hole; 52. an internal thread segment; 6. a nut; 61. countersink; 62. a reducing section; 621. a square groove; 7. a screw; 8. a bearing; 9. and (5) pressing the cap.
Detailed Description
Embodiments of the present invention will be further described with reference to the accompanying drawings.
In a chassis carriage embodiment 1 of the circuit breaker of the invention, as shown in fig. 4 to 8, the chassis carriage of the circuit breaker comprises an end beam 1, a chassis 4, a lead screw 3 and a nut 6, wherein the lead screw 3 is axially limited and rotatably assembled on the end beam 1, a nut mounting seat 5 is fixed on the chassis 4, the chassis 4 is positioned at the rear side of the end beam 1, the chassis 4 is positioned at the front side of the chassis 4, the nut mounting seat 5 is fixed on an upright side wall at the rear end of the chassis 4 through bolts, a mounting hole 51 is arranged in the nut mounting seat 5, the nut 6 matched with the lead screw 3 is axially and fixedly assembled in the mounting hole 51, a bearing capable of bearing axial force is arranged between the nut 6 and the mounting hole 51, the bearing is provided with a fixing seat ring and a shaft ring fixed with the nut, the axis of the nut 6 (namely the axis of a thread of the nut 6) coincides with the axis of the mounting hole 51, the chassis carriage of the circuit breaker further comprises a locking mechanism for locking and fixing the nut 6 on the nut mounting seat 5, the nut is provided with an operating end extending out of the mounting hole 51, and the operating end is provided with a rotating part matched with a rotating operator when the locking mechanism is unlocked.
The nut 6 is provided with a plurality of positioning holes at intervals along the circumferential direction, and the locking mechanism is a threaded fastener which is inserted into the nut mounting seat 5 from outside to inside and forms positioning fit with the positioning holes. In this embodiment, threaded holes for installing screws 7 are formed in the circumferential side wall of the nut mounting seat 5, two threaded holes are formed in the number of the threaded holes, threaded fasteners are screws 7 inserted into the threaded holes, one end of the nut 6 extends out of a shaft collar of the bearing, and positioning holes are counter bores 61 formed in the outer circumferential surface of the portion, extending out of the shaft collar, of the nut 6 at intervals.
In this embodiment, the nut 6 includes a nut body, the nut body is a cylindrical structure, the operation end is a reduced diameter section 62 disposed on an end surface of the nut body, a radial dimension of the reduced diameter section 62 is smaller than that of the nut body, the reduced diameter section 62 extends out of the nut mounting seat 5 through the mounting hole 51, and the rotating fit portion is a square groove 621 disposed on an outer peripheral surface of the reduced diameter section 62 at intervals.
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 bearing 8 capable of bearing axial force is arranged in the mounting hole 51 of the nut mounting seat 5, the nut 6 is fixed with the shaft ring of the bearing 8, the nut mounting seat 5 is fixed on the side wall erected on the rear end of the chassis 4, the nut 6 and the nut mounting seat 5 are fixed together by the screw 7, the screw 3 is stretched into and fixed on the end beams 1 and penetrates through the nut 6, and at the moment, the nut 6 and the screw 3 form a screw-nut mechanism.
In the process of operating the chassis, if the screw 3 and the nut 6 are found to be unable to accurately reach the working and test positions due to the problem of machining precision, the screw 7 on the nut mounting seat 5 can be loosened, the square groove 621 on the reduced diameter section 62 is rotated by a special tool (such as a wrench), at this time, the nut 6 and the nut mounting seat 5 are in a loosened state, the nut 6 and the shaft collar can rotate relative to the axis of the nut mounting seat 5, fine adjustment is performed on the nut 6, and because the nut 6 is matched with the screw 3, the chassis is driven to axially move in the process of adjusting the nut 6 due to the fixation of the nut 6 and the shaft collar of the bearing 8, and the nut 6 is fixed on the nut mounting seat 5 by the screw 7 after the chassis accurately reaches the working and test positions.
According to the chassis of the circuit breaker, errors exist in machining of thread starting points on the screw rod 3 and the nut 6, under the condition that a circuit breaker body loaded on the chassis cannot accurately reach a working and testing position, the nut 6 is enabled to axially move along the screw rod 3 through fine adjustment of the angle of the nut 6, the chassis is driven to accurately move to the working and testing position in the nut moving process, 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 invention is different from embodiment 1 in that, as shown in fig. 9, the locking mechanism is a pressing cap 9 inserted into the mounting hole 51 and pressed onto the annular table between the nut body and the operating end 62, the pressing cap 9 is a hollow step shaft with small front and large back, the periphery of the small diameter section of the step shaft is provided with external threads, the mounting hole 51 extends backwards from the hole at the front end and is provided with an internal thread section 52 matched with the external threads of the small diameter section of the step shaft, and the periphery of the front part of the large diameter section of the step shaft is provided with a rotating matching part for an operator to rotate the nut.
Embodiment 3 of the chassis of the circuit breaker of the invention is different from embodiment 1 in that the holes for installing the screws on the nut mounting seat are unthreaded holes, and the positioning holes are threaded holes arranged at intervals on the outer peripheral surface of the nut.
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 (6)
1. Chassis car of circuit breaker, including end beam and chassis, rotate on the end beam and be equipped with the spacing lead screw of axial, 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 axially and fixedly assembled in the mounting hole in a rotating manner, a bearing capable of bearing axial force is arranged between the nut and the mounting hole, the bearing is provided with a seat ring fixed with the mounting seat and a shaft ring fixed with the nut, the chassis truck of the circuit breaker further comprises a locking mechanism used for locking and fixing the nut on the mounting seat or the chassis, the nut is provided with an operating end extending out of the mounting hole, and the operating end is provided with a rotating matching part for an operator to rotate the nut when the locking mechanism is unlocked;
the nut comprises a nut body, an operation end is a diameter-reducing section which is arranged on the end face of the nut body and has a radial dimension smaller than that of the nut body, a ring table is formed between the diameter-reducing section and the nut body, and a locking mechanism is a pressing cap which is inserted into the mounting hole and is pressed onto the ring table to lock and fix the nut;
the nut is characterized in that the press cap is a hollow step shaft with a small front part and a large rear part, an external thread is arranged on the periphery of the small diameter section of the step shaft, an internal thread section matched with the external thread of the small diameter section of the step shaft is arranged in a backward extending mode of the mounting hole from the hole at the front end, and a rotating matching part for an operator to rotate the nut is arranged on the periphery of the front part of the large diameter section of the step shaft.
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 a screw arranged on the circumferential side wall of the nut mounting seat, at least one end of the nut extends out of the shaft collar along the axial direction, and the positioning holes are threaded holes or counter bores arranged on the outer circumferential surface of the part of the nut extending out of the shaft collar at intervals.
4. Screw nut mechanism, including lead screw and lead screw mount pad, its characterized in that: the chassis truck of the circuit breaker further comprises a locking mechanism used for locking and fixing the nut on the mounting seat or the chassis, the nut is provided with an operating end extending out of the mounting hole, and the operating end is provided with a rotating matching part for an operator to rotate the nut when the locking mechanism is unlocked;
the nut comprises a nut body, an operation end is a diameter-reducing section which is arranged on the end face of the nut body and has a radial dimension smaller than that of the nut body, a ring table is formed between the diameter-reducing section and the nut body, and a locking mechanism is a pressing cap which is inserted into the mounting hole and is pressed onto the ring table to lock and fix the nut;
the nut is characterized in that the press cap is a hollow step shaft with a small front part and a large rear part, an external thread is arranged on the periphery of the small diameter section of the step shaft, an internal thread section matched with the external thread of the small diameter section of the step shaft is arranged in a backward extending mode of the mounting hole from the hole at the front end, and a rotating matching part for an operator to rotate the nut is arranged on the periphery of the front part of the large diameter section of the step shaft.
5. The lead screw nut mechanism of claim 4, 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.
6. The lead screw nut mechanism of claim 5, wherein: the threaded fastener is a screw arranged on the circumferential side wall of the nut mounting seat, at least one end of the nut extends out of the shaft collar along the axial direction, and the positioning holes are threaded holes or counter bores arranged on the outer circumferential surface of the part of the nut extending out of the shaft collar at intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810575276.0A CN108631205B (en) | 2018-06-06 | 2018-06-06 | Screw nut mechanism and chassis truck of circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810575276.0A CN108631205B (en) | 2018-06-06 | 2018-06-06 | Screw nut mechanism and chassis truck of circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108631205A CN108631205A (en) | 2018-10-09 |
| CN108631205B true CN108631205B (en) | 2023-09-19 |
Family
ID=63691135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810575276.0A Active CN108631205B (en) | 2018-06-06 | 2018-06-06 | Screw nut mechanism and chassis truck of circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108631205B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1047451A (en) * | 1996-07-31 | 1998-02-20 | Ntn Corp | Backlash-preventing feed screw device |
| CN202106354U (en) * | 2010-12-30 | 2012-01-11 | 成都飞机工业（集团）有限责任公司 | Replacement tool with shoulder lining |
| CN202549659U (en) * | 2012-04-20 | 2012-11-21 | 山东泰开高压开关有限公司 | Manual operator for assembly of 550kV circuit breaker |
| CN102901543A (en) * | 2011-07-28 | 2013-01-30 | 上海朝辉压力仪器有限公司 | Liquid level sensor |
| CN203521990U (en) * | 2013-09-18 | 2014-04-02 | 河南森源电气股份有限公司 | Interlock mechanism of chassis truck and switchgear door |
| CN106975964A (en) * | 2017-06-07 | 2017-07-25 | 北京精雕科技集团有限公司 | A kind of mechanical pushing linear motion device of use screw-nut transmission |
| JP6260843B1 (en) * | 2017-03-14 | 2018-01-17 | 忠 井上 | Lock nut not to loosen |
| CN208257247U (en) * | 2018-06-06 | 2018-12-18 | 河南森源电气股份有限公司 | A kind of chassis vehicle of leadscrew-nut mechanism and breaker |
-
2018
- 2018-06-06 CN CN201810575276.0A patent/CN108631205B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1047451A (en) * | 1996-07-31 | 1998-02-20 | Ntn Corp | Backlash-preventing feed screw device |
| CN202106354U (en) * | 2010-12-30 | 2012-01-11 | 成都飞机工业（集团）有限责任公司 | Replacement tool with shoulder lining |
| CN102901543A (en) * | 2011-07-28 | 2013-01-30 | 上海朝辉压力仪器有限公司 | Liquid level sensor |
| CN202549659U (en) * | 2012-04-20 | 2012-11-21 | 山东泰开高压开关有限公司 | Manual operator for assembly of 550kV circuit breaker |
| CN203521990U (en) * | 2013-09-18 | 2014-04-02 | 河南森源电气股份有限公司 | Interlock mechanism of chassis truck and switchgear door |
| JP6260843B1 (en) * | 2017-03-14 | 2018-01-17 | 忠 井上 | Lock nut not to loosen |
| CN106975964A (en) * | 2017-06-07 | 2017-07-25 | 北京精雕科技集团有限公司 | A kind of mechanical pushing linear motion device of use screw-nut transmission |
| CN208257247U (en) * | 2018-06-06 | 2018-12-18 | 河南森源电气股份有限公司 | A kind of chassis vehicle of leadscrew-nut mechanism and breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108631205A (en) | 2018-10-09 |
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