CN114079248A

CN114079248A - Closing lock for electric switching device

Info

Publication number: CN114079248A
Application number: CN202010801300.5A
Authority: CN
Inventors: 潘斌华; 李勇; 朱小民
Original assignee: Jiangsu Luokai Mechanical & Electrical Co ltd; Shanghai Liangcheng Electromechanical Technology Co ltd
Current assignee: Jiangsu Luokai Mechanical & Electrical Co ltd; Shanghai Liangcheng Electromechanical Technology Co ltd
Priority date: 2020-08-11
Filing date: 2020-08-11
Publication date: 2022-02-22

Abstract

The invention discloses a closing lock of an electric switch device, the electric switch device comprises a drawer device and a breaker body, and the relative position of the breaker body and the drawer device comprises: the circuit breaker comprises a separation position, a test position, a connection unclamped position and a connection clamping position, wherein the circuit breaker body cannot be switched on at the separation position, the circuit breaker body can be switched on at the test position, the circuit breaker body cannot be switched on at the connection unclamped position, and the circuit breaker body can be switched on at the connection clamping position. The switching-on lock is installed on the drawer device, and the switching-on lock cooperates with the trip bar of circuit breaker body, and the trip bar is locked to the switching-on lock, and the circuit breaker body can not close a floodgate, and switching-on lock release trip bar, circuit breaker body can close a floodgate, the switching-on lock is at experimental position and the in-process of connecting clamping position release trip bar, all locks the trip bar at the separation position, the in-process of connecting not clamping position and position transform.

Description

Closing lock for electric switching device

Technical Field

The present invention relates to the field of electrical devices, and more particularly to electrical switching apparatus of the withdrawable configuration.

Background

Electrical switchgear generally has a draw-out configuration, and a common electrical switchgear includes: universal circuit breakers, molded case circuit breakers, automatic transfer switches with drawer devices, medium voltage circuit breakers, medium voltage switchgear, and the like. The device with the draw-out structure comprises a body and a drawer device. The body is provided with a bridge-type contact as a body busbar, and the drawer device is provided with a contact bridge for realizing electric connection with the body busbar. The contact bridge on the drawer device is connected with the external wire inlet and outlet end. When the body is pushed into the drawer device, the body busbar is contacted with the contact bridge to form a conductive path, and the body is communicated with an external wire inlet and outlet end. When the body is pulled out of the drawer device, the body busbar is separated from the contact bridge, the conductive path is cut off, and isolation is realized, so that the test or maintenance is facilitated. The body busbar and the contact bridge form an electric connection device of the electrical device with the draw-out structure. In some products, the bridge-type contact is also arranged on the draw-out device and the contact bridge is arranged on the body, but in the configuration, the electric connection device of the electric device with the draw-out structure is still formed by the busbar and the contact bridge, and the basic principle is the same as that of the structure.

The drawbacks of the electrical connection devices used in the prior art are introduced in the patent applications with publication numbers CN111403939A, CN111403938A, and in the patent with publication numbers CN211017487U, CN211045800U, which have been filed by the applicant of the present application, and a new structure of the electrical connection device is proposed. This novel structure's electric connection device will insert the withdrawal process and part with the clamping process, the operation degree of difficulty that reduces, the clamp force that also ensures simultaneously and the area of contact of electricity connection, the electric performance of the electricity connection of effective promotion.

Since the structure of the novel electrical connection device is significantly different from that of the conventional electrical connection device, an electrical switch device using the novel electrical connection device needs to be matched with a driving operation mechanism corresponding to the electrical switch device.

Disclosure of Invention

According to an embodiment of the present invention, a closing lock of an electrical switching apparatus is provided, the electrical switching apparatus including a drawer device and a circuit breaker body, a relative position of the circuit breaker body and the drawer device including: the separating position, the test position, connect not pressing from both sides tight position and connect the tight position of clamp, female row at the separating position circuit breaker body separates with electric connector, the circuit breaker body can not close a floodgate, female row at the test position circuit breaker body separates with electric connector, the circuit breaker body can close a floodgate, female arranging and the electric connector contact of connecting not pressing from both sides tight position circuit breaker body, electric connector does not press from both sides tight female arranging, the circuit breaker body can not close a floodgate, female arranging and the electric connector contact of connecting the tight position circuit breaker body, electric connector presss from both sides tight female arranging, the circuit breaker body can close a floodgate. The switching-on lock is installed on the drawer device, and the switching-on lock cooperates with the trip bar of circuit breaker body, and the trip bar is locked to the switching-on lock, and the circuit breaker body can not close a floodgate, and switching-on lock release trip bar, circuit breaker body can close a floodgate, the switching-on lock is at experimental position and the in-process of connecting clamping position release trip bar, all locks the trip bar at the separation position, the in-process of connecting not clamping position and position transform.

In one embodiment, the closing lock is an interlock mechanism comprising: drawer interlock, drawer push rod and interlock plate. The drawer interlocking member is installed on the drawer device, the drawer interlocking member is close to the outer side of the drawer device, the outer side end and the inner side end of the drawer interlocking member form a convex interlocking part, and the middle of the drawer interlocking member forms a concave releasing part. The drawer push rod is installed on the drawer device, the drawer push rod is located on the inner side of the drawer interlocking piece, the middle of the drawer push rod is connected to the drawer device in a rotating mode through a rotating shaft, the top of the drawer push rod is a horizontal interlocking rod, the bottom of the drawer push rod is an inclined trigger rod, the drawer push rod is provided with an interlocking position and a release position, the interlocking rod is pressed downwards at the interlocking position, the interlocking rod is lifted upwards at the release position, the drawer push rod is provided with a push rod spring, and the drawer push rod is rotated towards the release position due to the spring force of the push rod spring. The interlocking plate is formed by extending the inner side wall of the supporting plate to the top.

In one embodiment, the circuit breaker body enters the drawer arrangement, passing sequentially through a disconnect position, a test position, a connection undamped position, and a connection clamped position;

at the separation position, the interlocking part at the outer side end of the drawer interlocking piece locks the trip bar, and the breaker body cannot be switched on;

the tripping rod enters a concave releasing part in the middle of the drawer interlocking piece, the tripping rod is released, and the breaker body can be switched on;

the circuit breaker body moves inwards when moving from a test position to a connection non-clamping position, the trip bar is separated from a release part of the drawer interlocking piece and is locked by an interlocking part at the inner side end of the drawer interlocking piece, the circuit breaker body cannot be switched on, the circuit breaker body continues to move inwards, the interlocking plate rotates along with the supporting plate and is contacted with a trigger bar of the drawer push rod, the drawer push rod rotates from the release position to the interlocking position, the trip bar is separated from the drawer interlocking piece but continues to be locked by the interlocking bar of the drawer push rod, and the circuit breaker body cannot be switched on;

the interlocking plate rotates along with the supporting plate and is separated from the trigger rod of the drawer push rod, the drawer push rod rotates to a release position from the interlocking position under the action of the push rod spring, the interlocking rod of the drawer push rod releases the trip rod, and the breaker body can be switched on.

In one embodiment, the circuit breaker body exits the drawer arrangement sequentially through a connection clamped position, a connection undamped position, a test position, and a disconnected position;

at the connecting and clamping position, the drawer push rod is positioned at the release position under the action of the push rod spring, the trip rod is released, and the breaker body can be switched on;

the interlocking plate rotates along with the supporting plate and is contacted with a trigger rod of the drawer push rod, the drawer push rod rotates from a release position to an interlocking position under the action of the interlocking plate, the interlocking rod of the drawer push rod locks the trip rod, and the breaker body cannot be switched on;

from a connection non-clamping position to a test position, the breaker body moves outwards, the trip bar is separated from the interlocking bar of the drawer push rod but is continuously locked by the interlocking part at the inner side end of the drawer interlocking piece, the breaker body cannot be switched on, the breaker body moves to the test position, the trip bar enters the concave release part in the middle of the drawer interlocking piece, the trip bar is released, and the breaker body can be switched on;

from the test position to the separation position, the breaker body moves outwards, the trip bar is separated from the release part of the drawer interlocking piece and is locked by the interlocking part at the outer side end of the drawer interlocking piece, and the breaker body cannot be switched on.

In one embodiment, the electrical switching apparatus has a drive mechanism comprising: drive shaft, slide plate, main shaft and layer board. One end of the driving shaft is connected with a handle, and the handle is rotated to drive the driving shaft to rotate. The sliding plate is installed on the driving shaft, the rotation of the driving shaft is converted into the translation of the sliding plate, the driving shaft drives the sliding plate to translate, and the sliding plate moves towards the inner side or the outer side of the drawer device to drive the circuit breaker body to enter or exit the drawer device. The main shaft is arranged on the drawer device, the main shaft is matched with the sliding plate, the sliding plate moves to a separation position, a test position, a connection non-clamping position and a connection clamping position, and the main shaft correspondingly rotates to a separation angle, a test angle, a connection non-clamping angle and a connection clamping angle. The layer board is installed on the drawer device, and the circuit breaker body erects on the layer board, and layer board and main shaft cooperation, main shaft rotate to separation angle, experimental angle, connect and do not press from both sides tight angle and connect and press from both sides tight angle, and the layer board drives the circuit breaker body to separation position, experimental position, connect and do not press from both sides tight position and connect and press from both sides tight position.

In one embodiment, two ends of the spindle are provided with transmission gears, the bottom of the supporting plate is circular and provided with transmission teeth, the transmission teeth are meshed with the transmission gears, the spindle rotates to drive the supporting plate to rotate, and the inner side wall of the supporting plate extends to the top to form an interlocking plate.

In one embodiment, the breaker body enters the drawer device, the main shaft rotates to the connection clamping angle, the supporting plate is driven to rotate to the connection clamping angle, the interlocking plate rotates along with the supporting plate and is separated from the trigger rod of the drawer push rod, the drawer push rod rotates from the interlocking position to the releasing position under the action of the push rod spring, the interlocking rod of the drawer push rod releases the tripping rod, and the breaker body can be switched on.

In one embodiment, the breaker body withdraws from the drawer device, the main shaft rotates from the connection clamping angle to the connection non-clamping angle to drive the supporting plate to also rotate from the connection clamping angle to the connection non-clamping angle, the interlocking plate rotates along with the supporting plate and is in contact with the trigger rod of the drawer push rod, the drawer push rod rotates from the release position to the interlocking position under the action of the interlocking plate, the interlocking rod of the drawer push rod locks the trip rod, and the breaker body cannot be switched on.

In one embodiment, the circuit breaker body enters the drawer device, and the supporting plate can rotate continuously for a release allowance angle at the connection clamping angle, so that the interlocking plate is ensured to be separated from the trigger rod of the drawer push rod. The circuit breaker body withdraws from the drawer device, and the supporting plate reversely rotates through the releasing allowance angle and returns to the connecting and clamping angle.

In one embodiment, the release margin angle is 3 degrees.

The closing lock of the electric switch device is matched with the electric switch device using the electric connection device with a new structure, and the electric connection device can be configured with a large clamping force to clamp the body busbar according to the requirement, so that the whole contact resistance of the electric device is greatly reduced, the power consumption is greatly reduced particularly in long-term use, the use cost is greatly saved, and the higher the rated current of the electric device is, the more remarkable the advantage is. On the other hand, the reduction of contact resistance for the temperature rise of product reduces, and electrical apparatus generates heat and reduces, need not consider big heat dissipation space, and the size that is strong in reducing the product improves the reliability of long-term use. The electric switch device is provided with a drawer device, a driving mechanism, a locking mechanism and an interlocking mechanism which are matched with the electric switch device, and combined with the characteristics of the electric switch device, the electric switch device has four working positions, namely a separation position, a test position, a connection unclamping position and a connection clamping position, so that the operability and the safety of the electric switch device are ensured. The switch-on lock is an interlocking mechanism, can allow the breaker body to be switched on at a test position and a connecting and clamping position, and can prevent the breaker body from being switched on in the processes of separating position, connecting and unclamping position and position conversion so as to ensure the safety.

Drawings

The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings in which like reference numerals denote like features throughout the several views, wherein:

fig. 1a and 1b show a block diagram of an electrical switching device according to an embodiment of the present invention, wherein fig. 1a shows a state that a breaker body has not entered a drawer device, and fig. 1b shows a state that the breaker body has entered the drawer device.

Figures 2a, 2b, 2c and 2d disclose block diagrams of the drive mechanism in an electrical switching apparatus according to an embodiment of the invention.

Figure 3 discloses a block diagram of a latching mechanism in an electrical switching apparatus according to an embodiment of the present invention.

Figure 4 discloses a block diagram of a drawer interlock of an interlock mechanism in an electrical switching apparatus according to one embodiment of the present invention.

Figure 5 discloses an overall construction of an electrical switching apparatus according to an embodiment of the invention.

Figure 6 discloses a side view of an electrical switching apparatus in a disengaged position in accordance with an embodiment of the present invention.

Figures 7a and 7b disclose a block diagram of the drive mechanism of an electrical switching apparatus in a disengaged position in accordance with an embodiment of the present invention.

Figure 8 discloses a side view of an electrical switching apparatus in a test position according to an embodiment of the present invention.

Figures 9a and 9b disclose a block diagram of a drive mechanism of an electrical switching apparatus according to an embodiment of the present invention in a test position.

Figure 10 discloses a side view of an electrical switching apparatus in a connection undamped position in accordance with one embodiment of the present invention.

Figures 11a and 11b disclose a block diagram of a drive mechanism of an electrical switching apparatus in a connected undamped position according to an embodiment of the present invention.

Figure 12 discloses a side view of an electrical switching apparatus in a connection clamping position in accordance with one embodiment of the present invention.

Figures 13a and 13b disclose a block diagram of a drive mechanism of an electrical switching apparatus in a connecting clamping position in accordance with an embodiment of the present invention.

Fig. 14a, 14b, 14c and 14d illustrate the mating relationship of the sliding plate and the main shaft in different positions.

Detailed Description

The invention discloses a closing lock of an electric switch device, which is realized by an interlocking mechanism in the electric switch device, and the structure and the working process of the closing lock (the interlocking mechanism) are inseparable from other related parts in the electric switch device, so that the following description is carried out on the whole of the electric switch device. Figures 1a and 1b disclose block diagrams of an electrical switching apparatus according to an embodiment of the present invention. The electric switch device includes: a drawer arrangement 101, an electrical connection arrangement 102, a drive mechanism 103, a locking mechanism 104 and an interlocking mechanism. The breaker body 105 enters or exits the drawer arrangement 101. The electrical connection device 102 is mounted on the drawer device 101, the electrical connection device 102 has a clamping mechanism, and the electrical connection device 102 communicates with a busbar 151 of the circuit breaker body 105 and an external circuit. The driving mechanism 103 is installed on the drawer device 101, and the driving mechanism 103 drives the breaker body 105 to move, so that the busbar 151 of the breaker body is in contact with or separated from the electrical connection device 102. The locking mechanism 104 is installed on the drawer device 101, and the locking mechanism 104 drives the clamping mechanism of the electrical connection device 102, so that the electrical connection device 102 clamps or releases the busbar 151 of the circuit breaker body. An interlock mechanism is mounted on the drawer arrangement, the interlock mechanism not being shown in fig. 1a and 1b, as will be shown in subsequent figures. The interlocking mechanism is matched with a tripping rod of the circuit breaker body to allow or prevent the circuit breaker body from being switched on. The electrical switching apparatus of the present invention uses the electrical connecting apparatus 102 of a different structure compared to the electrical switching apparatus of the prior art, and as to the specific structure of the electrical connecting apparatus 102, the applicant of the present application has already filed patent applications with publication numbers CN111403939A, CN111403938A, and patents with publication numbers CN211017487U, CN211045800U, which are cited in the present application, and as to the specific structure of the electrical connecting apparatus 102, reference may be made to the above-mentioned patent applications, which will not be described repeatedly herein. Since the structure and operation of the electrical connection device are different from those of the prior art, the driving mechanism, the locking mechanism and the interlocking mechanism of the electrical switching device of the present invention are also changed accordingly to adapt to the structural change of the electrical connection device. The electric switching device of the invention differs from the electric switching devices of the prior art in a general sense in that: the electrical switching device of the present invention has four positions: a disengaged position, a testing position, a connection unclamped position, and a connection clamped position. And prior art's electric switching device, because the female in-process of inserting electric connecting device of arranging of circuit breaker body, female arranging targets in place and presss from both sides tight synchronous completion, consequently only has three positions: a separation position, a test position and a connection position. In the prior art, the circuit breaker body enters a connection position, and the busbar is inserted into the electrical connection device and clamped. In the electric switch device of the invention, the bus bar enters the electric connection device and is clamped separately, so that the electric switch device has two positions in the connection state: a connection undamped position and a connection clamped position. Although the electrical switching device of the present invention has four positions, it is still necessary to satisfy the basic principle in the process of connecting the breaker body and the drawer device, i.e., to ensure safety by limiting the closing function of the breaker body: actuating mechanism drive circuit breaker body removes, and the relative position of circuit breaker body and drawer device includes:

a separation position, at which the busbar of the breaker body is separated from the electric connection device and the breaker body cannot be switched on;

the test position is that the busbar of the breaker body is separated from the electric connecting device, and the breaker body can be switched on;

connecting the unclamped position, wherein a busbar connected with the unclamped position circuit breaker body is contacted with an electric connecting device, the electric connecting device does not clamp the busbar, and the circuit breaker body cannot be switched on;

and connecting clamping positions, wherein the busbar of the breaker body is contacted with the electric connecting device at the connecting clamping positions, the electric connecting device clamps the busbar, and the breaker body can be switched on.

The structures of the actuating mechanism, the locking mechanism and the interlocking mechanism in the electric switching device according to the invention will be described separately below.

Figures 2a, 2b, 2c and 2d disclose block diagrams of the drive mechanism in an electrical switching apparatus according to an embodiment of the invention. Wherein fig. 2a discloses the structure of the slide plate, fig. 2b the structure of the spindle, fig. 2c the structure of the carrier plate and fig. 2d the structure of the assembled drive mechanism. In one embodiment, the drive mechanism comprises: a drive shaft 201, a slide plate 202, a spindle 203 and a pallet 204. One end of the driving shaft 201 is connected to a handle (not shown), and the driving shaft 201 is rotated by rotating the handle. The slide plate 202 is mounted on a drive shaft 201, and rotation of the drive shaft 201 is translated into translation of the slide plate 202. The driving shaft 210 is rotated by shaking the handle to drive the sliding plate 202 to translate, and the sliding plate 202 moves towards the inner side or the outer side of the drawer device 101 to drive the breaker body 105 to enter or exit the drawer device 101. The connection of the drive shaft to the slide plate is a conventional handle rocker structure, which is common in the art and will not be described in detail herein. In addition, for clarity and uniformity of description, the following definitions are made for directions in the present invention: the direction in which the drawer device is separated from the breaker body is the "outer side", and the direction in which the drawer device is close to the breaker body is the "inner side". The inward movement means movement toward the inside of the drawer device, the outward movement means movement toward the opening of the drawer device, the inward end means one end close to the inside, and the outward end means one end close to the outside. A main shaft 203 is mounted on the drawer arrangement 101, the main shaft 203 being rotatable and cooperating with the sliding plate 202. The slide plate 202 is moved to the separation position, the test position, the connection unclamping position, and the connection clamping position, and the main shaft 203 is rotated to the separation angle, the test angle, the connection unclamping angle, and the connection clamping angle, respectively. The tray 204 is mounted on the drawer device 101, and the tray 204 can rotate. The breaker body 105 is mounted on a pallet 204, and the pallet 204 is engaged with the main shaft 203. The main shaft 203 is rotated to a separation angle, a test angle, a connection unclamping angle, and a connection clamping angle, and the blade 204 is correspondingly rotated to a separation angle, a test angle, a connection unclamping angle, and a connection clamping angle, and brings the breaker body 105 to a separation position, a test position, a connection unclamping position, and a connection clamping position.

As shown in fig. 2a, 2b and 2d, the sliding plate 202 has a first driving groove 221, a second driving groove 222, an unlocking groove 223 and an interlocking groove 224. The main shaft 203 has a first arm 231 and a second arm 232 mounted thereon. The first suspension arm 231 has a bifurcated first driving lever 233 and an interlocking lever 234, and the second suspension arm 232 has a bifurcated second driving lever 235 and an unlocking lever 236. As shown, the first driving groove 221 and the interlocking groove 224 are aligned along a straight line, and the first driving groove 221 and the interlocking groove 224 form driving coupling with the first driving lever 233 and the interlocking lever 234 on the first arm. The opening angle of the first driving lever 233 and the interlocking lever 234 from the first cantilever 231 matches the interval of the first driving groove 221 and the interlocking groove 224. In operation, the first drive bar 233 engages the first drive slot 221 and the interlock lever 234 engages the interlock slot 224. Second drive slot 222 and unlock slot 223 are also aligned along a line and second drive slot 222 and unlock slot 223 form a drive coupling with second drive rod 235 and unlock rod 236 on the second arm. The angle of the opening of the second actuator arm 235 and the release lever 236 from the second arm 232 matches the spacing of the second actuator slot 222 and the release slot 223. In operation, the second drive bar 235 engages the second drive slot 222 and the release bar 236 engages the release slot 223. In the illustrated embodiment, the slide plate 202 further has a guide slot 225 therein, the guide slot 225 being guided when the slide plate is moved, the slide plate 202 moving along the guide slot 225.

As shown in fig. 2b, 2c and 2d, transmission gears 237 are mounted at both ends of the main shaft 203. The bottom of the supporting plate 204 is circular and has a transmission gear 241, the transmission gear 241 engages with the transmission gear 237, and the main shaft 203 rotates to drive the supporting plate 204 to rotate. Since the main shaft 203 and the supporting plate 204 are driven by the gear engagement, the rotation directions of the main shaft 203 and the supporting plate 204 are opposite. Referring to fig. 2c, the inner sidewall of the pallet 204 extends to the top to form an interlock plate 242, the inner end of the top of the pallet forms a driving groove 243, the outer end of the top of the pallet forms a connecting surface 244, and the top of the outer sidewall of the pallet is convex to form an exit driving portion 245.

Figure 3 discloses a block diagram of a latching mechanism in an electrical switching apparatus according to an embodiment of the present invention. Referring to fig. 3, the locking mechanism includes: locking gear 301, locking drive shaft 302 and locking rack 303. The lock gear 301 is installed on the drawer device, and the lock gear 301 can be rotated. A lock drive shaft 302 connects the lock gear 301 with the clamping mechanism of the electrical connection device 102. In the illustrated embodiment, the lock transmission shaft 302 is coaxial with the lock gear 301, and the lock transmission shaft 302 and the lock gear 301 rotate in synchronization. The locking gear 301 rotates, the locking transmission shaft 302 rotates along with the locking gear 301, the locking transmission shaft 302 is connected to a clamping mechanism of the electric connection device, and the locking transmission shaft 302 drives the clamping mechanism to clamp or loosen a busbar of the circuit breaker body. The structure of the clamping mechanism of the electrical connection device to clamp or release the breaker bar is described in patent applications and patents such as CN111403939A, CN111403938A, CN211017487U, CN 211045800U. A locking rack 303 is formed on the sliding plate 202, and the locking rack 303 extends from the inner end of the sliding plate 202 toward the outer side. The sliding plate moves towards the inner side, the locking rack 303 is contacted and meshed with the locking gear 301 to drive the locking gear to rotate in the clamping direction, and the locking transmission shaft 302 drives the clamping mechanism to clamp the busbar of the breaker body. The sliding plate moves outwards to drive the locking gear 301 to rotate in the loosening direction, and the locking transmission shaft 302 drives the clamping mechanism to loosen the busbar of the breaker body. The sliding plate 202 continues to move outward, and since the position of the locking gear 301 is fixed, after the sliding plate 202 moves outward a sufficient distance, the locking rack 303 is disengaged from the locking gear 301, the locking gear 301 does not rotate any more, and the clamping mechanism of the electrical connection device does not operate any more. In one embodiment, the locking rack and the locking gear can also be configured to be engaged all the time, and correspondingly, the electrical connection device has a clamping stroke large enough to meet the requirement that the electrical connection device idles when the busbar is not inserted into the electrical connection device in the separation position and the test position. Specifically, after the sliding plate 202 is moved to the outside and outside to a proper position, the locking rack 303 and the locking gear 301 may still be in the contact engagement state, in this embodiment, the clamping stroke of the electrical connection device 102 needs to be large enough, and during the movement of the sliding plate at the separation position and the test position, the electrical connection device 102 is clamped in an idle manner but still has a sufficient space distance, so that the circuit breaker body busbar 151 is not clamped in the process of entering the electrical connection device 102. The advantage of this embodiment is that the locking rack 303 and the locking gear 301 are kept engaged so that the whole system is always in a coupled state, and the re-engagement due to the assembly clearance between the parts is avoided. Such an embodiment has a more stable operation performance.

The interlocking mechanism is a closing lock of the electric switch device provided by the invention, and comprises: drawer interlock 401, drawer push rod 402, and interlock plate 242. Figure 4 discloses a block diagram of a drawer interlock of an interlock mechanism in an electrical switching apparatus according to one embodiment of the present invention. The drawer interlock 401 is installed on the drawer device such that the drawer interlock 401 is installed near the outside of the drawer device 101. Referring to fig. 4, the outer and inner ends of the drawer interlock 401 form protruding interlocking

portions

411 and 412, respectively, and the middle of the drawer interlock forms a recessed release portion 413. Referring to fig. 5, the drawer push rod 402 can be seen, and fig. 5 shows an overall structure of an electrical switch device according to an embodiment of the present invention. The drawer push rod 402 is installed on the drawer device, the drawer push rod 402 is located inside the drawer interlocking member 401, and the middle portion of the drawer push rod 402 is rotatably connected to the drawer device through a rotating shaft. At the top of the drawer push rod is a horizontal interlock lever 421 and at the bottom of the drawer push rod is a slanted trigger lever 422, the drawer push rod having an interlock position and a release position. In the locking position, the locking lever 421 is pushed down downward, and in the release position, the locking lever 421 is lifted upward, and the drawer push rod has a push rod spring (not shown), and the drawer push rod is rotated toward the release position by the spring force of the push rod spring. Interlocking plate 242 is formed by extending the inner sidewall of pallet 204 to the top, and interlocking plate 242 is shown with reference to fig. 2 c.

Figure 5 discloses an overall construction of an electrical switching apparatus according to an embodiment of the invention. Fig. 5 shows the drawer arrangement and the circuit breaker body removed to more clearly show the structure of the electrical connection device 102, the actuating mechanism, the locking mechanism and the interlocking mechanism. Due to the angle, the locking gear and the locking drive shaft in the locking mechanism are not shown in fig. 5, but the locking rack at the inner end of the sliding plate is clearly visible. The assembled drive shaft 201, slide plate 202, spindle 203 and pallet 204 are visible in fig. 5. In the embodiment shown in fig. 5, the drive mechanism further comprises a side sled 205, the side sled 205 having an entry pin 251 and an exit pin 252, the circuit breaker body being mounted on the side sled 205. The entry pin 251 and exit pin 252 of the side slide 205 cooperate with the tray 204 to drive the circuit breaker body into and out of the drawer arrangement. In fig. 5, the positions of the drawer interlocking part 401 and the drawer pushing rod 402 are shown, the drawer interlocking part 401 and the drawer pushing rod 402 are matched with a tripping rod 501 on the breaker body, and the tripping rod 501 determines whether the breaker body can be switched on. The trip bar 501 is locked, the circuit breaker body cannot be closed, the trip bar 501 is released, and the circuit breaker body can be closed.

The states of the breaker body and the drawer device in four relative positions will be described below. In the process that the breaker body enters the drawer device, the breaker body sequentially passes through a separation position, a test position, a connection unclamping position and a connection clamping position.

First is the disengaged position. The requirement at the separation position is that the busbar of the circuit breaker body is separated from the electrical connection device and the circuit breaker body cannot be closed. Figure 6 discloses a side view of an electrical switching apparatus in a disengaged position in accordance with an embodiment of the present invention. Figures 7a and 7b disclose a block diagram of the drive mechanism of an electrical switching apparatus in a disengaged position in accordance with an embodiment of the present invention. As shown in fig. 7a and 7b, in the disengaged position, the main shaft 203 is at the disengaged angle, the first driving lever 233 is located in the first driving groove 221, and the second driving lever 235 is located in the second driving groove 222. The unlocking lever 236 and the unlocking groove 223 are not separated from each other, and the interlocking lever 234 and the interlocking groove 224 are also not separated from each other. With reference to fig. 6, 7a and 7b, in the disengaged position, the spindle 203 is at a disengagement angle and the pallet 204 is also at the disengagement angle. The entry pin 251 of the side slide 205 is located in the drive recess 243 of the pallet 204. The circuit breaker body placed on the side slide is located at the separated position. In the disengaged position, the interlocking portion 411 of the outer end of the drawer interlock 401 presses and locks the trip lever 501 so that the circuit breaker body cannot be closed. In the disengaged position, the locking gear is disengaged from the locking rack, so that the locking mechanism does not act. As previously described, in the case of an electrical connection device with a sufficiently large clamping travel, it is also possible in some embodiments to arrange the locking rack and the locking gear in a constantly engaged manner.

Then the test site. The requirement at the test position is that the busbar of the circuit breaker body is separated from the electric connection device, but the circuit breaker body can be switched on. The test position is mainly used for testing the operation function of the electric switch device on the breaker body and testing the switching-on and switching-off operations, so that the breaker body is required to be capable of switching-on and switching-off operations at the test position. However, the test position is only a test for the operation function of the breaker body, and the breaker body is not connected to the main circuit, so that the busbar of the breaker body is still separated from the electrical connection device. Figure 8 discloses a side view of an electrical switching apparatus in a test position according to an embodiment of the present invention. Figures 9a and 9b disclose a block diagram of a drive mechanism of an electrical switching apparatus according to an embodiment of the present invention in a test position. As shown in fig. 9a and 9b, in the process of moving from the separated position to the test position, the sliding plate 202 moves toward the inner side of the drawer device along the guide groove 225 by the driving shaft 201, the outer side end of the first driving groove 221 pushes the first driving lever 233, and the outer side end of the second driving groove 222 pushes the second driving lever 235. Because the first suspension arm 231 and the second suspension arm 232 are fixed on the main shaft, the first driving rod and the second driving rod move under the pushing of the first driving groove and the second driving groove, so as to drive the first suspension arm and the second suspension arm to move, and drive the main shaft 203 to rotate, so that the main shaft 203 rotates to a test angle from a separation angle. In the process, the unlocking rod and the unlocking groove do not act, and the interlocking rod and the interlocking groove do not act. Referring to fig. 8, 9a and 9b, when the spindle 203 is moved from the separation position to the test position, the carrier 204 engaged with the spindle through the transmission gear 237 is also rotated from the separation angle to the test angle. It should be noted that, since the pallet 204 is engaged with the spindle 203 through a gear, the rotation directions of the pallet and the spindle are opposite, and when the spindle rotates clockwise, the pallet rotates counterclockwise. When the main shaft rotates anticlockwise, the supporting plate rotates along the pointer. The outer end of the driving recess 243 of the pallet pushes the entering shaft pin 251 of the side sliding plate 205. The pallet rotates from the separation angle to the test angle, and the breaker body is driven to move from the separation position to the test position through the side sliding plate 205. In the process of moving from the disconnecting position to the testing position, the breaker body moves inward, and the trip lever 501 also moves inward and enters the recessed release 413 in the middle of the drawer interlock 401. The release portion 413 is recessed inward, so that the trip lever 501 is released, and the circuit breaker body can perform closing operation to meet the requirement of a test position. In the test position, the locking gear and the locking rack are still disengaged, so that the locking mechanism does not act. As previously described, in the case of an electrical connection device with a sufficiently large clamping travel, it is also possible in some embodiments to arrange the locking rack and the locking gear in a constantly engaged manner.

The connection unclamped position follows. The requirement of the connection non-clamping position is that the busbar of the breaker body is in contact with the electric connecting device, the electric connecting device does not clamp the busbar, and the breaker body cannot be switched on. From the test position into the connection unclamping position, the busbar of the circuit breaker body starts to enter the area of the electrical connection device. However, before the busbar is completely inserted into the electrical connection device and clamped, the main circuit needs to be kept in an open state, and thus the breaker body cannot be closed in the process. Figure 10 discloses a side view of an electrical switching apparatus in a connection undamped position in accordance with one embodiment of the present invention. Figures 11a and 11b disclose a block diagram of a drive mechanism of an electrical switching apparatus in a connected undamped position according to an embodiment of the present invention. During the movement from the test position to the coupling undamped position, the slide plate 202 continues to move along the guide slot 225 towards the inside of the drawer arrangement by the drive shaft 201, as shown in fig. 11a and 11 b. The outer end of the first driving groove 221 pushes the first driving rod 233 until the first driving rod 233 comes out of the first driving groove 221 (refer to fig. 11 b). The outer end of the second driving groove 222 pushes the second driving rod 235 until the second driving rod 235 exits the second driving groove 222 (refer to fig. 11 b). This is done by rotating spindle 203 to the connection unclamped angle. The first and second drive rods of the spindle at the connection unclamped angle have already escaped from the first and second drive slots. Interlock lever 234 has not yet entered interlock slot 224. However, although the lock release lever 236 enters the lock release groove 223, the lock release groove 223 is a relatively long groove, and thus the lock release lever 236 and the lock release groove 223 do not work at this position. Thus, the slide plate and the main shaft temporarily do not interact with each other after reaching the connection unclamping position. Referring to fig. 10, 11a and 11b, when the main shaft 203 is rotated from the test angle to the connection unclamped angle by moving from the test position to the connection unclamped position, the pallet 204 engaged with the main shaft through the transmission gear 237 is also rotated from the test angle to the connection unclamped angle. In this process, the outer end of the driving groove 243 pushes the entrance pin 251 of the side slider 205, and the breaker body is moved from the test position to the connection unclamped position by the side slider 205. When the main shaft and the blade are rotated to the coupling unclamped angle, the side slide and the breaker body reach the coupling unclamped position, and the entry pin 251 is disengaged from the driving recess 243 and stays on the coupling surface 244 of the blade 204. The connecting surface 244 is a continuous arc surface so that when the entrance pin 251 is located on the connecting surface 244, the connecting pin 251 is not pushed any more by the continued rotation of the blade 204, i.e., the blade 204 continues to rotate and the positions of the side slide and the circuit breaker body do not move. In the process of moving from the test position to the connection non-clamping position, the breaker body moves inward, the trip lever 501 comes out of the release portion 413 of the drawer interlock 401, and is pressed and locked again by the interlock portion 412 of the inner end of the drawer interlock, so that the breaker body cannot be closed. The circuit breaker body continues to move inwardly and the interlock plate 242 on the tray 204 rotates with the tray and contacts the trigger lever 422 of the drawer push rod 402. Under the action of the interlocking plate 242, the drawer push rod 402 is rotated from the release position to the interlocking position against the spring force of the push rod spring, and the interlocking rod 421 of the drawer push rod 402 is pressed downward. After the trip lever 501 moves inward following the breaker body and is separated from the drawer interlock 401, the trip lever 501 continues to be pressed and locked by the interlock lever 421 of the drawer push rod 402, and the breaker body remains in a state where it cannot be closed. During the process of moving from the test position to the connection non-clamping position, the locking mechanism has two realization modes: in the first mode, in the process of moving from the test position to the connection non-clamping position, the sliding plate 202 and the circuit breaker body move inwards, the busbar of the circuit breaker body gradually enters the electric connection device 102, the locking rack 303 is meshed with the locking gear 301, along with the movement of the sliding plate, the locking rack synchronously drives the locking gear to rotate in the clamping direction, and the clamping mechanism of the electric connection device 102 starts to gradually clamp the busbar of the circuit breaker body. In the first mode, the locking rack 303 is long and extends a long distance from the inner end of the sliding plate, and after the sliding plate passes through the test position, the locking rack starts to be engaged with the locking gear, and the action of the busbar of the circuit breaker body entering the electrical connection device and the action of the electrical connection device clamping the busbar are performed synchronously. In the second mode, the test position is moved to the connection unclamping position, the sliding plate and the breaker body move inwards, the busbar of the breaker body gradually enters the electric connection device, but the locking rack and the locking gear still keep being separated. In the second mode, the locking rack 303 is shorter and extends a shorter distance from the inner end of the sliding plate, the locking rack and the locking gear are always separated before the sliding plate reaches the connection unclamping position, and the action of the busbar of the circuit breaker body entering the electrical connection device and the action of the electrical connection device clamping the busbar are separately performed. As previously described, in the case of an electrical connection device with a sufficiently large clamping travel, it is also possible in some embodiments to arrange the locking rack and the locking gear in a constantly engaged manner.

And finally the connection clamping position. The requirement of the connection clamping position is that a busbar of the breaker body is in contact with an electric connecting device, the electric connecting device clamps the busbar, and the breaker body can be switched on. The connection clamping position is a normal use position, the busbar of the circuit breaker body is fully contacted with the electric connecting device and clamped, and the circuit breaker body is connected into the main loop and works normally, so that the circuit breaker body can be switched on at the connection clamping position. Figure 12 discloses a side view of an electrical switching apparatus in a connection clamping position in accordance with one embodiment of the present invention. Figures 13a and 13b disclose a block diagram of a drive mechanism of an electrical switching apparatus in a connecting clamping position in accordance with an embodiment of the present invention. As shown in fig. 13a and 13b, moving from the coupling undamped position to the coupling clamped position, the sliding plate 202 continues to move along the guide slot 225 toward the inside of the drawer arrangement under the action of the drive shaft 201. At this time, the unlocking bar 236 is located in the unlocking slot 223, and since the unlocking slot 223 is a relatively long slot, before the outer end of the unlocking slot 223 contacts the unlocking bar 236, there is no interaction between the sliding plate 202 and the main shaft 203, and the main function of the sliding plate moving inwards is to enable the locking rack 303 arranged at the inner end of the sliding plate to drive the locking gear to rotate, so that the electric connection device clamps the busbar of the circuit breaker body. After locking in place, the slide plate 202 is moved to the connection clamping position, at which time the outer ends of the unlocking slots 223 contact and push the unlocking levers 236 to rotate the main shaft 203 to the connection clamping angle. Meanwhile, when the spindle is rotated to the connection clamping angle, the interlocking lever 234 enters the interlocking groove 224, but the interlocking lever 234 does not interact with the interlocking groove 224. The interlocking rod 234 enters the interlocking slot 224 so that the circuit breaker body can be locked again from closing by using the interlocking rod 234 and the interlocking slot 224 when the circuit breaker body exits. Referring to fig. 12, 13a and 13b, after moving from the connection unclamping position to the connection clamping position, the main shaft 203 rotates from the connection unclamping angle to the connection clamping angle, and the pallet 204 engaged with the main shaft through the transmission gear 237 is also driven to rotate from the connection unclamping angle to the connection clamping angle. In this process, the entrance pin 251 of the side sled 205 slides on the attachment face 244 of the blade 204, there is no interaction between the blade 204 and the entrance pin 251, and thus neither the side sled nor the circuit breaker body position moves. During movement from the connection undamped position to the connection clamped position, the pallet 204 rotates from the connection undamped angle to the connection clamped angle, and although no longer in interaction with the side slide, the interlock plate 242 rotates with the pallet 204 and disengages from the trigger lever 422 of the drawer push rod 402. At this time, the drawer push rod 402 is rotated again from the interlocking position to the release position by the push rod spring, the interlocking rod 421 of the drawer push rod 402 releases the trip lever 501, and the breaker body can be closed. In one embodiment, the plate 204 can continue to rotate a release allowance angle after the clamping angle is engaged to ensure that the interlock plate 242 can also disengage from the trigger lever 422 of the drawer push rod 402 under part dimensional or assembly tolerances. In one embodiment, the blade continues to rotate by a release margin angle of about 3 degrees.

With the locking mechanism, whichever of the aforementioned modes (long locking rack or short locking rack) is used, the locking rack engages with the locking gear during movement from the connected non-clamping position to the connected clamping position. In the process, the breaker body is not moved, the busbar of the breaker body completely enters the electric connection device, the sliding plate 202 continues to move towards the inner side, the locking rack 303 is meshed with the locking gear to drive the locking gear to continue to rotate in the clamping direction, and the clamping mechanism clamps the busbar of the breaker body.

Fig. 14a, 14b, 14c and 14d illustrate the mating relationship of the sliding plate and the main shaft in different positions. The mating of the first drive slot 221, the second drive slot 222, the unlatching slot 223, and the interlock slot 224 on the slide plate 202 with the first arm 231 of the main shaft, the first drive lever 233 on the second arm 232, the interlock lever 234, the second drive lever 235, and the interlock lever 236 during advancement of the circuit breaker body is further illustrated. In the disengaged position, shown with reference to fig. 14a, the spindle is at the disengaged angle, the first drive lever is in the first drive slot (the first drive lever and the first drive slot are obscured in fig. 14a due to the angular relationship), the second drive lever 235 is in the second drive slot 222, the unlatching lever 236 is disengaged from the unlatching slot 223 and is not actuated, and the interlock lever 234 is disengaged from the interlock slot 224 and is not actuated. Moving from the disengaged position to the testing position, the slide plate 202 is moved towards the inside of the drawer arrangement, as shown with reference to fig. 14b, the direction indicated by the arrow in fig. 14a, 14b, 14c and 14d being the direction of movement of the slide plate 202. The outboard end of the first drive slot pushes the first drive lever (the first drive lever and the first drive slot are hidden in fig. 14b due to the angular relationship), and the outboard end of the second drive slot 222 pushes the second drive lever 235, so that the spindle rotates to the test angle, the unlock lever 236 does not act on the unlock slot 223, and the interlock lever 234 does not act on the interlock slot 224. Moving from the testing position to the connected undamped position, and referring to fig. 14c, the slide plate 202 continues to move toward the inside of the drawer arrangement, with the outboard end of the first drive slot pushing the first drive rod until the first drive rod exits the first drive slot (which is obscured in fig. 14c due to the angular relationship between the first drive rod and the first drive slot), and the outboard end of the second drive slot 222 pushing the second drive rod 235 until the second drive rod exits the second drive slot. So that the spindle is rotated to a connection unclamped angle. At this time, the unlocking lever 236 enters the unlocking groove 223, but the unlocking groove 223 is a relatively long groove, so the unlocking lever 236 does not act on the unlocking groove 223, and the interlocking lever 234 does not yet enter the interlocking groove 224, so the interlocking lever 234 does not act on the interlocking groove 224. Moving from the connection undamped position to the connection clamped position, as shown with reference to fig. 14d, the slide plate 202 continues to move toward the inside of the drawer arrangement, the outboard end of the unlocking slot 223 contacts the unlocking lever 236 and pushes the unlocking lever 236 so that the spindle rotates to the connection clamped angle. When the spindle is rotated to the connection clamping angle, the interlock rod 234 enters the interlock slot 224 but the interlock rod 234 does not interact with the interlock slot 224. The interlocking bar 234 enters the interlocking slot 224 so that the inner end of the interlocking slot 224 can act on the interlocking bar 234 when exiting, so that the trip bar of the circuit breaker body is locked from closing.

The process that the breaker body withdraws from the drawer device is just opposite to the process, and the process sequentially passes through a connection clamping position, a connection non-clamping position, a test position and a separation position.

In the connection clamping position, reference is made to fig. 12, 13a and 13 b. Spindle 203 is at the connection clamp angle, interlock lever 234 is in interlock slot 224, unlock lever 236 is in unlock slot 223, the first drive lever is not active with the first drive slot, and the second drive lever is not active with the second drive slot. In the connection clamping position, the spindle 203 is at the connection clamping angle, the pallet 204 is also at the connection clamping angle, the entry pin 251 of the side slide 205 is on the connection surface 244 of the pallet 204, and the exit pin 252 of the side slide 205 is not in contact with the pallet 204. In the connection clamping position, the interlocking plate 242 is separated from the trigger lever 422 of the drawer push rod 402, the drawer push rod 402 is located at the release position under the action of the push rod spring, the interlocking lever 421 is lifted upwards, the trip lever 501 is released, and the breaker body can be closed. In one embodiment, there is a release margin angle so that during ejection the pallet 204 is first rotated back through the release margin angle and back to the connection clamping angle. In one embodiment, the blade release margin angle is about 3 degrees.

From the connection clamping position to the connection unclamping position, refer to fig. 10, 11a and 11 b. The slide plate 202 is moved along the guide groove 225 toward the outside of the drawer apparatus by the driving shaft 201, and the inner end of the interlock groove 224 pushes the interlock lever 234 until the interlock lever 234 is out of the interlock groove 224, so that the main shaft 203 is rotated to a connection unclamping angle. Before the spindle is rotated to the connection unclamping angle, the unlocking lever 236 is merely located in the unlocking slot 223 but the unlocking lever 236 does not act with the unlocking slot 223. The first driving rod does not act on the first driving groove, and the second driving rod does not act on the second driving groove. Moving from the coupling clamped position to the coupling unclamped position, the main shaft 203 is rotated from the coupling clamped angle to the coupling unclamped angle, and the blade 204 engaged with the main shaft through the transmission gear 237 is also rotated from the coupling clamped angle to the coupling unclamped angle. The entry pin 251 slides on the connection surface 244 of the blade 204, the exit pin 252 has not yet contacted the blade 204, the blade 204 does not interact with the entry pin 251 and the exit pin 252, and neither the side sled 205 nor the circuit breaker body moves. When the interlocking plate 242 rotates along with the supporting plate 204 and contacts with the trigger bar 422 of the drawer push rod 402, the drawer push rod 402 rotates from the release position to the interlocking position against the spring force of the push rod spring under the action of the interlocking plate 242, the interlocking bar 421 of the drawer push rod 402 presses and locks the trip bar 501, and the breaker body cannot be closed. The connecting and clamping position is moved to the connecting and non-clamping position, the side sliding plate and the breaker body are not moved, the sliding plate moves outwards, the locking rack 303 is meshed with the locking gear, and the locking rack 303 drives the locking gear to rotate according to the loosening direction, so that the clamping mechanism loosens the busbar of the breaker body. In the mode using the short locking rack (corresponding to the second mode), when the short locking rack reaches the connection non-clamping position, the locking rack is separated from the locking gear, and the action that the electric connection device loosens the busbar and the busbar of the circuit breaker body to exit from the electric connection device is separately performed. In the mode using the longer locking rack (corresponding to the first mode), when the longer locking rack reaches the connection unclamping position, the locking rack and the locking gear are still meshed but not separated, and the actions of releasing the busbar by the electric connection device and withdrawing the busbar of the circuit breaker body from the electric connection device are synchronously performed. As previously described, in the case of an electrical connection device with a sufficiently large clamping travel, it is also possible in some embodiments to arrange the locking rack and the locking gear in a constantly engaged manner. If in a form of constant engagement, the locking rack and the locking gear do not disengage.

From the connected non-clamped position to the test position, reference is made to fig. 8, 9a and 9 b. The sliding plate 202 moves toward the outside of the drawer device along the guide groove 225 by the driving shaft 201, and the inside end of the unlocking groove 223 pushes the unlocking lever 236, so that the main shaft 203 rotates from the connection unclamping angle to the test angle. In this process, the first driving lever 233 enters the first driving groove 221, and the second driving lever 235 enters the second driving groove 222. The inside end of the unlocking groove 223 continuously pushes the unlocking lever 236 until the unlocking lever 236 is disengaged from the unlocking groove 233, then the inside end of the first driving groove 221 continuously pushes the first driving lever 233, and the inside end of the second driving groove 222 continuously pushes the second driving lever 235, so that the main shaft 203 continuously rotates until the test angle is reached. From the connection unclamped position to the test position, the main shaft 203 is rotated from the connection unclamped angle to the test angle, and the pallet 204 engaged with the main shaft through the transmission gear 237 is also driven to rotate from the connection unclamped angle to the test angle. The withdrawing driving part 245 of the pallet 204 contacts and pushes the withdrawing shaft pin 252, so that the side sliding plate 205 drives the breaker body to move outward, and simultaneously the entering shaft pin 251 enters the driving groove 243 from the connecting surface of the pallet. The supporting plate 204 continues to rotate, the withdrawing shaft pin 252 is separated from the withdrawing driving portion 245 of the supporting plate, and then the side sliding plate 205 drives the circuit breaker body to continue moving outwards to the testing position by pushing the side end of the driving groove 243 of the supporting plate to enter the shaft pin 251. In another embodiment, the withdrawing shaft pin 252 may be always pushed by the withdrawing driving part 245 to the test position, and the entering shaft pin 251 does not participate in the withdrawing process. In the process of connecting the unclamped position to the test position, the breaker body moves outward, the trip lever 501 is separated from the interlock lever 421 of the drawer push lever 402 but is continuously pressed and locked by the interlock portion 413 of the inner end of the drawer interlock 401, and the breaker body cannot be closed. The breaker body moves to the test position, the trip bar 501 enters the recessed release portion 413 in the middle of the drawer interlock 401, the trip bar 501 is released, and the breaker body can be closed. From the connection non-clamping position to the test position, the sliding plate and the breaker body move outwards, and the busbar of the breaker body gradually withdraws from the electric connection device. Under the mode that uses longer locking rack (corresponding to aforementioned first mode), locking rack and locking gear still interlock, drive locking gear and continue to rotate according to the direction of relaxing, and clamping mechanism continues to relax, and sliding plate and circuit breaker body move to experimental position to the outside, and female arranging and the electric connector separation of circuit breaker body, locking rack and locking gear break away from. In the mode using the short locking rack (corresponding to the aforementioned second mode), the locking rack and the locking gear are already separated at the connection non-clamping position, and from the connection non-clamping position to the test position, the sliding plate and the circuit breaker body move outward, and the busbar of the circuit breaker body gradually withdraws from the electrical connection device. As previously described, in the case of an electrical connection device with a sufficiently large clamping travel, it is also possible in some embodiments to arrange the locking rack and the locking gear in a constantly engaged manner. If in a form of constant engagement, the locking rack and the locking gear do not disengage.

From the test position to the detached position, reference is made to fig. 6, 7a and 7 b. The sliding plate 202 moves toward the outside of the drawer device along the guide groove 225 by the driving shaft 201, the inner side end of the first driving groove 221 pushes the first driving lever 233, the inner side end of the second driving groove 222 pushes the second driving lever 235, so that the main shaft rotates to a separation angle, the first driving lever 233 is held in the first driving groove 221, and the second driving lever 235 is held in the second driving groove 222, ready for the next entering process. From the test position to the separation position, the main shaft rotates from the test angle to the separation angle, the supporting plate 204 meshed with the main shaft through the transmission gear 237 is also driven to rotate from the test angle to the separation angle, and the inner end of the driving groove 243 pushes the shaft pin 251, so that the side sliding plate 205 and the breaker body move to the separation position to the outer side. In another embodiment, the withdrawing shaft pin 252 may be always pushed by the withdrawing driving part 245 to the separating position, and the entering shaft pin 251 does not participate in the withdrawing process. From the test position to the separated position, the breaker body moves outward, the trip lever 501 comes out of the release portion 413 of the drawer interlock 401, and is locked by the interlock portion 411 at the outer end of the drawer interlock, so that the breaker body cannot be closed. From the test position to the separation position, the locking gear is separated from the locking rack, and the locking mechanism does not act. As previously described, in the case of an electrical connection device with a sufficiently large clamping travel, it is also possible in some embodiments to arrange the locking rack and the locking gear in a constantly engaged manner. If in a form of constant engagement, the locking rack and the locking gear do not disengage.

The embodiments described above are provided to enable persons skilled in the art to make or use the invention and that modifications or variations can be made to the embodiments described above by persons skilled in the art without departing from the inventive concept of the present invention, so that the scope of protection of the present invention is not limited by the embodiments described above but should be accorded the widest scope consistent with the innovative features set forth in the claims.

Claims

1. A closing lock for an electrical switching apparatus, the electrical switching apparatus comprising a drawer apparatus and a circuit breaker body, wherein the relative position of the circuit breaker body and the drawer apparatus comprises: the circuit breaker comprises a separation position, a test position, a connection non-clamping position and a connection clamping position, wherein a bus bar of a circuit breaker body is separated from an electric connecting device at the separation position, the circuit breaker body cannot be switched on, the bus bar of the circuit breaker body is separated from the electric connecting device at the test position, the circuit breaker body can be switched on, the bus bar of the circuit breaker body at the connection non-clamping position is contacted with the electric connecting device, the electric connecting device does not clamp the bus bar, the circuit breaker body cannot be switched on, the bus bar of the circuit breaker body at the connection clamping position is contacted with the electric connecting device, the electric connecting device clamps the bus bar, and the circuit breaker body can be switched on;

the switching-on lock is installed on the drawer device, the switching-on lock is matched with the tripping rod of the breaker body, the switching-on lock locks the tripping rod, the breaker body cannot be switched on, the switching-on lock releases the tripping rod, the breaker body can be switched on, the switching-on lock releases the tripping rod at a test position and a connecting and clamping position, and the tripping rod is locked in the processes of separating position, connecting and unclamping position and position conversion.

2. A switch-on lock for an electrical switching apparatus according to claim 1, wherein said switch-on lock is an interlock mechanism comprising:

the drawer interlocking piece is arranged on the drawer device, the drawer interlocking piece is close to the outer side of the drawer device, the outer side end and the inner side end of the drawer interlocking piece form a convex interlocking part, and the middle of the drawer interlocking piece forms a concave releasing part;

the drawer push rod is arranged on the drawer device, the drawer push rod is positioned on the inner side of the drawer interlocking piece, the middle part of the drawer push rod is rotatably connected to the drawer device through a rotating shaft, the top of the drawer push rod is a horizontal interlocking rod, the bottom of the drawer push rod is an inclined trigger rod, the drawer push rod is provided with an interlocking position and a release position, the interlocking rod is pressed downwards in the interlocking position, the interlocking rod is lifted upwards in the release position, the drawer push rod is provided with a push rod spring, and the spring force of the push rod spring enables the drawer push rod to rotate towards the release position;

and the interlocking plate is formed by extending the inner side wall of the supporting plate to the top.

3. The closing lock of an electric switching apparatus according to claim 2, wherein the breaker body enters the drawer apparatus, passing through the separation position, the test position, the connection unclamping position and the connection clamping position in this order;

4. The closing lock of the electric switching apparatus according to claim 2, wherein the breaker body exits the drawer apparatus sequentially through the connection clamping position, the connection unclamping position, the test position and the separation position;

5. The switch-on lock for an electric switching device according to claim 2, characterized in that said electric switching device has a drive mechanism comprising:

one end of the driving shaft is connected with a handle, and the driving shaft is driven to rotate by rotating the handle;

the sliding plate is arranged on the driving shaft, the rotation of the driving shaft is converted into the translation of the sliding plate, the driving shaft drives the sliding plate to translate, and the sliding plate moves towards the inner side or the outer side of the drawer device to drive the breaker body to enter or exit the drawer device;

the main shaft is arranged on the drawer device, the main shaft is matched with the sliding plate, the sliding plate moves to a separation position, a test position, a connection non-clamping position and a connection clamping position, and the main shaft correspondingly rotates to a separation angle, a test angle, a connection non-clamping angle and a connection clamping angle;

the support plate is installed on the drawer device, the breaker body is erected on the support plate, the support plate is matched with the main shaft, the main shaft rotates to a separation angle, a test angle, a connection unclamping angle and a connection clamping angle, and the support plate drives the breaker body to a separation position, a test position, a connection unclamping position and a connection clamping position.

6. The closing lock of the electric switching device according to claim 5, wherein the transmission gears are installed at both ends of the main shaft, the bottom of the support plate is circular and has transmission teeth, the transmission teeth are engaged with the transmission gears, the main shaft rotates to drive the support plate to rotate, and the inner side wall of the support plate extends to the top to form the interlocking plate.

7. The switch-on lock of an electric switching device according to claim 6,

the circuit breaker body enters the drawer device, the main shaft rotates to a connection clamping angle, the supporting plate is driven to rotate to the connection clamping angle, the interlocking plate rotates along with the supporting plate and is separated from the trigger rod of the drawer push rod, the drawer push rod rotates to a release position from an interlocking position under the action of the push rod spring, the interlocking rod of the drawer push rod releases the trip rod, and the circuit breaker body can be switched on.

8. The switch-on lock of an electric switching device according to claim 6,

the circuit breaker body withdraws from the drawer device, the main shaft rotates from a connection clamping angle to a connection non-clamping angle to drive the supporting plate to rotate from the connection clamping angle to the connection non-clamping angle, the interlocking plate rotates along with the supporting plate and is in contact with the trigger rod of the drawer push rod, the drawer push rod rotates from the release position to the interlocking position under the action of the interlocking plate, the interlocking rod of the drawer push rod locks the trip rod, and the circuit breaker body cannot be switched on.

9. The switch-on lock of an electric switching device according to claim 6,

the circuit breaker body enters the drawer device, and the supporting plate can continuously rotate for a releasing allowance angle at a connecting and clamping angle, so that the interlocking plate is ensured to be separated from the trigger rod of the drawer push rod;

the circuit breaker body withdraws from the drawer device, and the supporting plate reversely rotates through the releasing allowance angle and returns to the connecting and clamping angle.

10. The closing lock of the electric switching device according to claim 6, wherein said release margin angle is 3 degrees.