CN202363392U - Connecting-rod-type rotating shaft locking mechanism - Google Patents
Connecting-rod-type rotating shaft locking mechanism Download PDFInfo
- Publication number
- CN202363392U CN202363392U CN2011204510518U CN201120451051U CN202363392U CN 202363392 U CN202363392 U CN 202363392U CN 2011204510518 U CN2011204510518 U CN 2011204510518U CN 201120451051 U CN201120451051 U CN 201120451051U CN 202363392 U CN202363392 U CN 202363392U
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- moving contact
- shaft body
- rotary shaft
- rotating shaft
- locking mechanism
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Abstract
The utility model belongs to low-voltage electrical equipment, and relates to a connecting-rod-type rotating shaft locking mechanism of a low-voltage circuit breaker. The connecting-rod-type rotating shaft locking mechanism comprises a rotating shaft body and a moving contact, wherein the moving contact penetrates through the inner cavity of the rotating shaft body in the radial direction, can rotate around the center of the rotating shaft body, and is arranged in central symmetry; movable contact points are arranged at the front and rear ends of the moving contact respectively and correspond to contact points of upper and lower static contacts; a spout with one open end is arranged at each of the front upper part and rear lower part of the rotating shaft body, and bayonet locks penetrating through the rotating shaft body axially are arranged in the spouts and can slide along the spouts; two pair of tension springs are arranged on the two axial sides of the rotating shaft body, one ends of each pair of tension springs are connected with two ends of the bayonet locks, the other ends of each pair of tension springs are fixed, and the tension force of the tension springs enables the bayonet locks to slide towards the inner sides of the spouts; and connecting rods are connected between the two bayonet locks and the moving contact and are hinged with the moving contact, and hinged points are positioned on two sides of the center of the moving contact. According to the connecting-rod-type rotating shaft locking mechanism, the resistance to anti-open motion is small, and the precision of switching on and off positions is high.
Description
Technical field
The utility model belongs to low voltage electrical equipment, relates to the link-type rotating axis locking mechanism in a kind of low-voltage circuit breaker.
Background technology
The rotating axis component of low-voltage circuit breaker generally includes the rotary shaft body that is driven by breaker operating mechanism and is installed in the moving contact on the rotary shaft body.When work; Rotary shaft body drives moving contact and together rotates; Branch, combined floodgate between realization and the circuit breaker fixed contact; But when circuit breaker owing to faults such as short circuits overcurrent takes place, need the contact to break off rapidly, carry out separating brake to move the needed time longer and utilize the protective circuit of operating mechanism to drive rotating shaft.Therefore, in order to guarantee that the contact can break off rapidly, the existing structure rotating axis component can directly be scolded out moving contact by the electric power between the contact before operating mechanism does not also drive rotary shaft body and carries out the separating brake action usually when overcurrent.And the effect of rotating axis locking mechanism, moving contact is remained on scold open position and not again with the fixed contact conducting, wait for that rotary shaft body rotates to the separating brake position.One Chinese patent application 201010208914.9, Chinese patent 200610037996.9 and Chinese patent 201020236754.4 have all been put down in writing this type of rotating axis locking mechanism; Bayonet lock by the spring pulling is set in this type mechanism usually; Simultaneously at the moving contact back side or the rotary shaft body edge cam surface is set, utilize bayonet lock to realize that in the slip on the cam surface and location moving contact and rotary shaft body scold out the location under the state to block at circuit breaker.The defective of this type mechanism is: 1, when moving contact is scolded out, bayonet lock will slide on cam surface than long distance usually, because function of friction makes that the process resistance of scolding out is bigger, influences circuit breaker and reliably scolds out; 2, the moving contact center is unfixing, makes that the degree of freedom of moving contact in rotary shaft body is bigger, is unfavorable for accurately putting in place of moving contact branch, closing position, influences its operational reliability.
Summary of the invention
The utility model technical problem to be solved is, provide a kind of scold to start make the link-type rotating axis locking mechanism that resistance is little, the divide-shut brake accuracy is high.
The link-type rotating axis locking mechanism of the utility model includes rotary shaft body and radially runs through the rotary shaft body inner chamber and the moving contact of the axis body center rotation that can rotate; Moving contact center symmetry, its rear and front end is respectively arranged with and upper and lower two moving contacts that the fixed contact contact is corresponding; Rotary shaft body front upper part and rear lower are provided with the chute of an end opening respectively, are mounted with the bayonet lock of axial perforation rotary shaft body in the chute, and bayonet lock can slide along chute; The axial both sides of rotary shaft body are provided with two pairs of extension springs, and each end to extension spring is connected with the bayonet lock two ends, and the other end of every pair of extension spring is a stiff end, and the pulling force of extension spring makes bayonet lock to the sliding tray inner slide; Be connected with connecting rod respectively between two bayonet locks and the moving contact, be articulated and connected between connecting rod and the moving contact, pin joint is positioned at both sides, moving contact center.
The center of said moving contact is installed in the center of rotary shaft body through rotating shaft.
Said each stiff end to the extension spring that is positioned at the axial both sides of rotary shaft body is connected the two ends of a steady pin, and steady pin is stuck in the draw-in groove on the rotary shaft body.
The change in location of connecting rod when the utility model utilizes the moving contact rotation; And then the relative position of pin joint that makes connecting rod and rotating shaft is in normal condition (separating brake or "on" position) with scold out the both sides that lay respectively at extension spring active force dead point under the state; Thereby tangible existing branch, making process transfer axis body and moving contact do not relatively rotate, simultaneously in the function of scolding out the relative rotary shaft body rotation of state lower moving contact and blocking.Compare with traditional structure, the advantage applies of the utility model exists:
1, bayonet lock need not slided on cam surface in scolding open procedure, thereby its resistance of motion is less, has guaranteed to scold carrying out smoothly of open procedure, has improved reliable in action property;
2, moving contact and rotary shaft body center are provided with interconnective central shaft, make the pivot relative fixed of moving contact, have improved the precision of moving contact branch, closing position, have guaranteed operational reliability.
Description of drawings
Fig. 1 is the perspective view of the utility model under normal condition;
Fig. 2 is that the utility model is cut structural representation open at normal condition lower rotary shaft body;
Fig. 3 is the plan structure sketch map of Fig. 2;
Fig. 4 is that the utility model is in the perspective view of scolding out under the state;
Fig. 5 is that the utility model is scolding out state lower rotary shaft body to cut structural representation open.
Embodiment
As shown in the figure; This link-type rotating axis locking mechanism includes rotary shaft body 1 and radially runs through the rotary shaft body inner chamber and the moving contact 2 of the axis body center rotation that can rotate; Moving contact center symmetry, its rear and front end is respectively arranged with and the corresponding moving contact 21 in upper and lower two fixed contact contacts; Rotary shaft body 1 front upper part and rear lower are provided with the chute 11 of an end opening respectively, are mounted with the bayonet lock 3 of axial perforation rotary shaft body in the chute, and bayonet lock can slide along chute; Rotary shaft body 1 axial both sides are provided with two pairs of extension springs 4, and each end to extension spring is connected with bayonet lock 3 two ends, and the other end of every pair of extension spring is a stiff end, and the pulling force of extension spring makes bayonet lock to the sliding tray inner slide; Be connected with connecting rod 5 respectively between two bayonet locks 3 and the moving contact 2, be articulated and connected between connecting rod 5 and the moving contact 2, pin joint 22 is positioned at both sides, moving contact center.The center of moving contact 2 is installed in the center of rotary shaft body through rotating shaft 6.Each stiff end to the extension spring 4 that is positioned at the axial both sides of rotary shaft body is connected the two ends of a steady pin 7, and steady pin 7 is stuck in the draw-in groove 12 on the rotary shaft body.
The operation principle of the utility model is:
When normal operation of circuit breaker; As shown in Figure 2; Moving contact 2 is constant with the relative position of rotary shaft body 1; Moving contact 2 can together rotate with rotary shaft body 1, carries out normal separating brake or combined floodgate, and extension spring 4 this moment acts on power on the moving contact through connecting rod 5, and to make the movement tendency of moving contact 2 relative rotary shaft bodies 1 be clockwise direction;
If under the breaker closing state, have short circuit current to pass through, the electromagnetic force between contact will make moving contact 2 scold out, and drive mechanism's not action as yet of rotary shaft body 1 separating brake this moment; Rotary shaft body 1 does not rotate; Thereby relative rotary shaft bodies 1 rotation of moving contact 2, as shown in Figure 5, moving contact 2 is rotated counterclockwise under the electromagnetic force effect and the active force that overcomes extension spring makes connecting rod 5 swings; The position of the pin joint 22 relative rotary shaft bodies 1 of connecting rod and moving contact changes; When pin joint 22 was crossed the dead point of extension spring active force, extension spring power became counterclockwise the movement tendency of moving contact 2 relative rotary shaft bodies 1, thereby made moving contact 2 keep blocking scolding open position can not fall; Drive rotary shaft body 1 up to operating mechanism and rotate to the separating brake position, just make the relative position of moving contact and rotary shaft body return to normal condition.
Claims (3)
1. link-type rotating axis locking mechanism; Include rotary shaft body (1) and radially run through the rotary shaft body inner chamber and the moving contact (2) of the axis body center rotation that can rotate; Moving contact center symmetry, its rear and front end is respectively arranged with the moving contact (21) corresponding with upper and lower two fixed contact contacts; Rotary shaft body (1) front upper part and rear lower are provided with the chute (11) of an end opening respectively, are mounted with the bayonet lock (3) of axial perforation rotary shaft body in the chute, and bayonet lock can slide along chute; Rotary shaft body (1) axially is provided with two pairs of extension springs (4) in both sides; Each end to extension spring is connected with bayonet lock (3) two ends; The other end of every pair of extension spring is a stiff end, and the pulling force of extension spring makes bayonet lock to the sliding tray inner slide, it is characterized in that: be connected with connecting rod (5) respectively between two bayonet locks (3) and the moving contact (2); Be articulated and connected between connecting rod (5) and the moving contact (2), pin joint (22) is positioned at both sides, moving contact center.
2. link-type rotating axis locking mechanism according to claim 1 is characterized in that: the center of moving contact (2) is installed in the center of rotary shaft body through rotating shaft (6).
3. link-type rotating axis locking mechanism according to claim 1 and 2; It is characterized in that: each stiff end to the extension spring (4) that is positioned at the axial both sides of rotary shaft body is connected the two ends of a steady pin (7), and steady pin (7) is stuck in the draw-in groove (12) on the rotary shaft body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204510518U CN202363392U (en) | 2011-11-15 | 2011-11-15 | Connecting-rod-type rotating shaft locking mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204510518U CN202363392U (en) | 2011-11-15 | 2011-11-15 | Connecting-rod-type rotating shaft locking mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202363392U true CN202363392U (en) | 2012-08-01 |
Family
ID=46574556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204510518U Expired - Lifetime CN202363392U (en) | 2011-11-15 | 2011-11-15 | Connecting-rod-type rotating shaft locking mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202363392U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102376504A (en) * | 2011-11-15 | 2012-03-14 | 江苏大全凯帆电器股份有限公司 | Connecting rod type rotating shaft clamping mechanism |
-
2011
- 2011-11-15 CN CN2011204510518U patent/CN202363392U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102376504A (en) * | 2011-11-15 | 2012-03-14 | 江苏大全凯帆电器股份有限公司 | Connecting rod type rotating shaft clamping mechanism |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160901 Address after: Xinba Daquan 212211 Yangzhong Road, Zhenjiang City, Jiangsu province 66 Patentee after: Jiangsu Daquan Kai Kai switch Co., Ltd. Address before: 212200 Jiangsu city of Zhenjiang province Yangzhong City Development Zone, Jiangsu Yihe road Daquan Kaifan electrical Limited by Share Ltd Patentee before: Jiangsu Daqo Kfine Electric Co., Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No.66 Daquan Road, Xinba Town, Yangzhong City, Zhenjiang City, Jiangsu Province Patentee after: Jiangsu Daquan Kaifan switch Co.,Ltd. Address before: No.66 Daquan Road, Xinba Town, Yangzhong City, Zhenjiang City, Jiangsu Province Patentee before: Jiangsu Daquan Kaifan Switch Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120801 |