CN109038345B

CN109038345B - Circuit breaker drawer seat

Info

Publication number: CN109038345B
Application number: CN201811159679.3A
Authority: CN
Inventors: 钱锦丰; 陈斌; 朱永清
Original assignee: Changshu Switchgear Manufacturing Co Ltd
Current assignee: Changshu Switchgear Manufacturing Co Ltd
Priority date: 2018-09-30
Filing date: 2018-09-30
Publication date: 2020-10-02
Anticipated expiration: 2038-09-30
Also published as: CN109038345A

Abstract

The utility model provides a circuit breaker drawer seat, drawer seat includes an outside casing, handle, clutching mechanism, drive assembly and lead screw, and clutching mechanism is used for establishing or breaking off transmission relation, characteristics between drive assembly and lead screw: the external shell is provided with a locking plate; the clutch mechanism and the screw rod rotate synchronously, and the clutch mechanism can slide vertically on the screw rod; a return spring provides driving force combined with the transmission assembly for the clutch mechanism; the locking tab is laterally movable between a first position and a second position; when the locking plate is in the first position, the clutch mechanism and the transmission assembly establish a transmission relation; when the lock plate moves from the first position to the second position, the lock plate pushes the clutch mechanism to vertically move on the screw rod; the locking plate is in the second position, and clutching mechanism and drive assembly disconnection transmission relation, handle and clutching mechanism joint, and the locking plate supports in the lateral direction and leans on the side of handle. The operator does not need to prop the clutch mechanism when rotating the handle, and the operation is simpler and more labor-saving.

Description

Circuit breaker drawer seat

Technical Field

The invention belongs to the technical field of circuit breakers, and particularly relates to a circuit breaker drawer base.

Background

Due to the convenience of detection and maintenance, the withdrawable universal circuit breaker is widely used. The drawable universal circuit breaker is divided into a circuit breaker body and a drawer seat, the drawer seat is directly connected with an external power supply, and the circuit breaker body can be pushed or drawn in the drawer seat through transmission of the drawer seat so as to realize connection and disconnection of the circuit breaker body and the drawer seat. As a large-capacity switching element, there is a certain risk in advancing or withdrawing the circuit breaker body, for example, an arc generated by a circuit fault and secondary phenomena pose a great threat to the personal safety of peripheral operators; in addition, as the capacity of the circuit breaker is continuously increased, the driving force required for the push-in or pull-out operation is more and more increased. Therefore, in order to overcome the above disadvantages, a more reliable and effective drawer base transmission structure is required, which can replace the manual operation to operate the pushing or pulling of the circuit breaker body in the drawer base.

In the existing electric drawer seat with the clutch, when an operator realizes manual driving through a handle, the spring force existing in the clutch often needs to be overcome, so that the operator needs to forcibly overcome the elastic force of the spring in the manual operation, and the difficulty is brought to the operation.

Disclosure of Invention

The invention aims to provide a circuit breaker drawer base which can realize the switching between electric drive and manual drive through an arranged clutch mechanism, when an insertion handle is switched to the manual drive, the elastic force of a return spring acts on a lock sheet, so that an operator does not need to push against the clutch mechanism when rotating the handle, and the operation is simpler and more labor-saving.

The invention aims to achieve the aim that the drawer seat of the circuit breaker comprises an external shell, a handle, a clutch mechanism, a transmission assembly and a screw rod, wherein the clutch mechanism is used for establishing or disconnecting a transmission relation between the transmission assembly and the screw rod; the clutch mechanism and the screw rod realize synchronous rotation, and the clutch mechanism can vertically slide on the screw rod; a return spring provides the clutch mechanism with driving force combined with the transmission assembly; the locking tab is laterally movable between a first position and a second position; when the lock plate is in the first position, the clutch mechanism and the transmission component establish a transmission relation; when the lock plate moves from the first position to the second position, the lock plate pushes the clutch mechanism to vertically move on the screw rod; the locking plate is in the second position, clutching mechanism and drive assembly disconnection transmission relation, the handle with clutching mechanism joint, the locking plate support in the lateral direction and lean on the side at the handle.

In a specific embodiment of the invention, the locking plate is provided with a handle through hole, an abutting part is arranged on one side of the handle through hole, which faces inwards, around the handle through hole, and an abutting tapered wedge surface is further arranged on the abutting part and is used for pushing the clutch mechanism to be separated from the transmission assembly.

In another embodiment of the present invention, the locking tab is manually actuated, and the handle is inserted after the locking tab is manually moved from the first position to the second position.

In another embodiment of the invention, the locking plate is actuated by a handle, the handle is inserted, and the handle actuates the locking plate from the first position to the second position.

In another specific embodiment of the present invention, the abutting portion further includes an abutting plane, and when the locking plate enters the second position, the abutting plane abuts against the clutch mechanism; the locking plate comprises a return spring, and the return spring provides the locking plate with a return force moving from the second position to the first position.

In another specific embodiment of the present invention, the clutch mechanism includes a linkage member and a clutch slider, the clutch slider is located on the linkage member and can slide relative to the linkage member, the transmission assembly includes a transmission gear, one end of the return spring abuts against the screw rod, and the other end abuts against the clutch slider.

In a further specific embodiment of the present invention, the clutch mechanism further includes a clutch elastic member, one end of the clutch elastic member abuts against the linkage member, and the other end of the clutch elastic member abuts against the clutch sliding member; the two opposite sides of the cylindrical surface of the linkage piece are provided with sliding grooves which are closed grooves, two ends of the clutch sliding piece extend out of the sliding grooves, and the sliding of the clutch sliding piece is limited by the sliding grooves.

In a more specific embodiment of the present invention, the drawer base includes a bottom plate, the outer casing is installed on a front side of the bottom plate, a fixing bracket is disposed on the locking plate, the return spring is installed on the fixing bracket, the return spring is horizontally disposed with respect to the locking plate, two ends of the return spring are clamped to two opposite inner sides of the fixing bracket, a diameter of the return spring is greater than a thickness of the fixing bracket, and when the locking plate moves horizontally, the return spring collides with an extending portion of the outer casing and is pressed by the extending portion.

In yet another specific embodiment of the present invention, a pushing outer edge boss is disposed on an outward side of the lock plate, a pushing wedge surface is disposed on the pushing outer edge boss, and the handle head at the end of the handle pushes the pushing wedge surface to drive the lock plate to move.

In yet another specific embodiment of the present invention, the clutch slider includes a sliding cylinder, a fitting rod and a fitting head, the fitting rod is inserted into the sliding cylinder and protrudes out of two sides of the sliding cylinder; the matching head is sleeved at the two ends of the matching rod.

In yet another embodiment of the present invention, the sliding cylinder is a cylinder, the engaging rod radially passes through the corresponding hole on the sliding cylinder and the two ends of the engaging rod extend through the pair of sliding grooves, and the engaging head is sleeved on the two ends of the engaging rod.

In yet another specific embodiment of the present invention, the linkage member is a circular tubular part, one end of the linkage member is provided with a fastening hole matched with the screw rod, the other end of the linkage member is provided with a handle fastening hole matched with the handle, and an accommodating cavity for accommodating the clutch elastic member and the clutch sliding member is arranged between the fastening hole and the handle fastening hole.

In yet another embodiment of the invention, the handle of the locking tab abuts against the side of the handle through the inside of the hole when the handle is inserted into position.

According to the invention, the switching between electric drive and manual drive is realized through the clutch mechanism, when the handle is inserted and the manual drive is switched, the elastic force of the return spring acts on the lock sheet, so that an operator does not need to push the clutch mechanism when rotating the handle, and the operation is simpler and more labor-saving.

Drawings

Fig. 1 is a schematic view of a drawer base of the circuit breaker according to the present invention.

Fig. 2 is a schematic view of a drawer base portion of the circuit breaker of the present invention.

Fig. 3 is a schematic view of an electric driving transmission chain of a drawer base of the circuit breaker according to the present invention.

FIG. 4 is a schematic view of the structure of the clutch mechanism, the lead screw and the transmission gear.

FIG. 5 is an exploded view of the clutch mechanism of the present invention.

FIG. 6 is a cross-sectional view of the clutch mechanism of the present invention.

FIG. 7 is a schematic view of a transmission gear according to the present invention.

Fig. 8 is a schematic sectional view of the clutch mechanism of the present invention.

FIG. 9 is a schematic view of the clutch mechanism engaged with the transmission gear according to the present invention.

Fig. 10 is a schematic view of the clutch mechanism of the present invention disengaged from the transmission gear.

FIG. 11 is a side sectional view of the clutch mechanism, lead screw, and transmission gear of the present invention.

Fig. 12 is a schematic view of the state in which the lead screw and the clutch mechanism are separated in the present invention.

FIG. 13 is a schematic view showing a connection state of a lead screw and a clutch mechanism according to the present invention.

Fig. 14 is a schematic view of the outer housing and locking tab of the present invention.

Fig. 15 is a schematic view of a locking tab of the present invention.

Fig. 16 is a schematic view of the handle of the present invention as it is inserted.

Fig. 17 is a schematic view of the present invention after the handle is fully inserted.

In the figure: 1. a drawer seat, 11, a bottom plate, 12, a side plate; 2. the transmission shaft, 21, a traction sheet, 22, a tooth sheet and 23, a rotating shaft mounting bracket; 3. a motor; 4. the transmission assembly, 41, the transmission gear, 411, the outer edge teeth, 412, the annular boss and 4121, the clamping and matching cavity; 5. the clutch mechanism, 51, the linkage piece, 511, the clamping hole, 512, the accommodating cavity, 5121, the step, 513, the handle clamping hole, 514, the chute, 52, the clutch elastic piece, 53, the clutch sliding piece, 531, the sliding body, 5311, the second spring abuts against the protrusion, 5312, the hole, 532, the matching rod, 533 and the matching head; 6. the screw rod is 61, the screw rod head is 611, and the first spring abuts against the protrusion; 7. a carriage; 8. a fixing plate; 9. a return spring; 100. a handle, 101, a handle head; 200. the outer shell, 201, the extension part, 202, the chute cavity, 203, the protrusion; 300. the locking piece, 301, the fixing support, 302, the return spring, 303, the pushing outer edge boss, 3031, the pushing inclined wedge surface, 304, the handle passing hole, 305, the abutting part, 3051, the abutting inclined wedge surface and 3052, the abutting plane.

Detailed Description

The applicant shall describe in detail the specific embodiments of the present invention in the following with reference to the attached drawings, but the description of the embodiments by the applicant is not a limitation of the technical solution, and any changes made in the form of the inventive concept rather than the essential change shall be regarded as the protection scope of the present invention.

The invention relates to a circuit breaker, in particular to a circuit breaker, which comprises a circuit breaker body and a drawer base 1; drawer seat 1 electricity connect outside electric wire netting, and this internal contact system that includes of circuit breaker can realize switching on or breaking off of circuit, when the circuit breaker body impels back in the drawer seat 1, the circuit breaker body realizes the electricity with drawer seat 1 and is connected. The circuit breaker is thus able to make or break an electrical connection of the load to the grid through the combined opening and closing of its contact system.

As shown in fig. 1, the drawer base 1 includes a bottom plate 11 and a pair of side plates 12, and the side plates 12 are installed on both sides of the bottom plate 11. And the chassis of the drawer seat 1 is respectively connected with the bottom plate 11 and the side plate 12 and is positioned at the rear of the drawer seat. On the drawer base 1, specifically, a transmission shaft 2 and a transmission assembly 4 are arranged on a bottom plate 11; the motor 3 is mounted on the transmission assembly 4, but may of course be mounted on the base plate 11. When the circuit breaker is switched to an electric drive mode, the motor 3 finally drives the transmission shaft 2 to rotate through the motion transmission of the transmission assembly 4, the transmission shaft 2 drives the circuit breaker body to move relative to the drawer base 1, and the connection or the separation between the circuit breaker body and the drawer base 1 is realized.

As shown in fig. 2 and 3, on the drawer base 1. Specifically, the bottom plate 11 is also provided with a clutch mechanism 5, a screw rod 6 and a carriage 7; the clutch mechanism 5 is positioned between the screw rod 6 and the transmission assembly 4, the screw rod 6 is rotatably arranged on the bottom plate 11, and the carriage 7 is slidably arranged on the bottom plate 11. The clutch mechanism 5 realizes the connection or separation between the transmission assembly 4 and the screw rod 6, thereby realizing the switching between electric drive and manual drive. That is, when the clutch mechanism 5 is in the "closed" state, the transmission assembly 4 is connected to the lead screw 6 through the clutch mechanism 5, so as to realize the synchronous rotation of the transmission assembly 4 and the lead screw 6, the lead screw 6 is driven to rotate by the movement of the transmission assembly 4, the carriage 7 is driven to slide back and forth by the rotation of the lead screw 6, the carriage 7 drives the transmission shaft 2 to rotate through the matching of the tooth holes, and finally the transmission shaft 2 drives the circuit breaker body to move. In order to ensure that the screw rod 6 can reliably rotate, a fixing plate 8 is sleeved on the screw rod 6, the fixing plate 8 is fixed on a bottom plate 11, and the screw rod 6 penetrates through a hole in the fixing plate 8 and can freely rotate relative to the fixing plate 8. The setting of fixed plate 8 for the rotation of lead screw 6 is more stable, has prevented that lead screw 6 from rotating the rocking that the in-process produced.

The rotating shaft 2 comprises a shaft body, a toothed sheet 22 is fixed on the shaft body, the toothed sheet 22 is fan-shaped, teeth are arranged on the outer edge surface of the toothed sheet 22, a toothed hole is formed in the carriage 7, and when the toothed sheet 22 is meshed with the carriage 7, the linkage relationship between the toothed sheet 22 and the carriage 7 is established. The two ends of the shaft body are fixedly provided with traction sheets 21, the traction sheets 21 are metal sheets, and clamping grooves are formed in the traction sheets and used for driving bosses on the two sides of the circuit breaker body to move. And a pair of rotating shaft mounting brackets 23 are also mounted on the rotating shaft 2 and used for ensuring that the rotating shaft 2 is rotatably arranged, and the rotating shaft mounting brackets 23 press the shaft body of the rotating shaft 2 and are fixed on the bottom plate 11.

The transmission assembly 4 is a gear set in the embodiment, but the transmission assembly 4 may also be a chain transmission structure or other structures capable of transmitting motion. The transmission assembly 4 comprises a housing and a gear set located inside the housing, so that the rotational installation of the gears in the gear set can be satisfied. The transmission assembly 4 comprises a transmission gear 41 for cooperating with the clutch mechanism 5. As shown in fig. 7, the transmission gear 41 is annular, the annular surface is provided with an outer edge tooth 411, and an annular boss 412 on the side of the transmission gear 41 close to the screw rod 6 is provided with a clamping concave cavity 4121.

Fig. 4, 5 and 6 are schematic structural diagrams of the clutch mechanism 5 and schematic matching diagrams of the clutch mechanism 5, the transmission assembly 4 and the lead screw 6. Specifically, the clutch mechanism 5 includes a linkage member 51, a clutch elastic member 52 and a clutch slider 53. The linkage 51 is a circular tubular component, which is a hollow tube, and the linkage 51 can also be called a sleeve. One end of the linkage piece 51 is provided with a clamping hole 511 matched with the screw rod 6, the other end of the linkage piece 51 is provided with a handle clamping hole 513 matched with the handle 100, and an accommodating cavity 512 for accommodating the clutch elastic piece 52 and the clutch sliding piece 53 is arranged between the clamping hole 511 and the handle clamping hole 513. The accommodating cavity 512 is a cylindrical inner cavity. The two opposite sides of the cylindrical surface of the linkage 51 are provided with sliding grooves 514, and the pair of sliding grooves 514 are closed grooves. Preferably, the pair of sliding grooves 514 are opposite in position and are correspondingly consistent in position in the length direction of the linkage 51. The clutch elastic member 52 provides the clutch sliding member 53 with a driving force combined with the transmission assembly 4, the clutch elastic member 52 is preferably a cylindrical spring, and the clutch elastic member 52 is preferably mounted in a manner that: one end of the clutch elastic member 52 abuts against the step 5121 of the inner surface of the link member 51, and the other end abuts against the clutch slider 53. The clutch slider 53 is also disposed in the accommodating chamber 513, the clutch slider 53 includes a sliding cylinder 531, a matching rod 532 and a matching head 533, the sliding cylinder 531 is a cylinder, and the matching rod 532 is clamped into the sliding cylinder 531 and protrudes out of two sides of the sliding cylinder 531. The fitting head 533 is sleeved at two ends of the fitting rod 532. The above connection relationship provides assemblability among the sliding cylinder 531, the engaging rod 532 and the engaging head 533. The sliding cylinder 531 is first placed in the accommodating cavity 512, then the engaging rod 532 radially passes through the corresponding hole 5312 of the sliding cylinder 531 and the two ends of the engaging rod 532 penetrate through the pair of sliding slots 514, and then the engaging heads 533 are mounted on the two ends of the engaging rod 532.

As shown in fig. 8 to 13, the clutch mechanism 5 is used to connect or disconnect the transmission relationship between the transmission assembly 4 and the lead screw 6. The screw rod 6 is in a round rod shape, one end of the screw rod 6 facing the clutch mechanism 5 is provided with a screw rod head 61, and the screw rod head 61 is also provided with a first spring abutting protrusion 611 for abutting against a spring. The screw rod head 61 is hexagonal, and can be in other shapes suitable for clamping. The clamping hole 511 of the linkage part 51 of the clutch mechanism 5 is clamped on the screw rod head 61 of the screw rod 6, so that the linkage part 51 and the screw rod 6 can form a synchronous rotating relation. When the clutch sliding piece 53 is in the first position, the clutch sliding piece 53 is clamped with the transmission assembly 4; when the clutch slider 53 is in the second position, the clutch slider 53 is disengaged from the transmission assembly 4. When the clutch mechanism 5 is in an "on" state, the clutch slider 53 is in a first position state, at this time, the clutch slider 53 is on the right side in the drawing, the engaging head 533 on the clutch slider 53 slides in the pair of sliding grooves 514 under the traction of the engaging rod 532 and is embedded into the engaging cavity 4121, so that the engagement between the clutch slider 53 and the transmission gear 41 is realized, and the clutch slider 53 and the transmission gear 41 move synchronously after being engaged. At the same time, since the engaging rod 532 is caught in the pair of slide grooves 514, the link member 51 follows the clutch slider 53 to rotate, and the lead screw 6 is rotated. The clamping concave cavity 4121 is arranged in a flaring mode. The angle of the flare is 0 ° to 180 °, preferably 0 ° to 120 °, more preferably 60 °, to facilitate self-release of the two in the event of jamming. Similarly, the engagement head 533 is preferably a roller, which also facilitates disengagement of the two. This arrangement makes the motor 3 be jammed when the drive system of the drawer base is jammed, and the motor 3 is seriously damaged. In the creation of the present invention, as shown in fig. 9, when the lead screw 6 is locked by the transmission chain, the lead screw 6 itself cannot rotate, so that the link 51 cannot rotate, and then the clutch slider 53 cannot rotate, so that the engaging head 533 on the clutch slider 53 cannot rotate, and further the engaging head 533 generates an acting force F in the direction shown in fig. 9 on the engaging cavity 4121. The force F has a component F2 in the axial direction and a component F1 in the rotational direction. And the presence of the component F2 converts the driving force of the motor 3 into a separating force of the clutch slider 53 and the transmission gear 41, which overcomes the clutch elastic member 52 to disengage the clutch slider 53 from the transmission gear 41. After the motor is disconnected, the transmission gear 41 can rotate freely, so that the motor 3 cannot be jammed and burnt.

For the improvement of the scheme, a return spring 9 can be additionally arranged. A return spring 9 has one end abutting on the first spring abutting projection 611 and the other end abutting on the second spring abutting projection 5311 on the sliding body 531. The return spring 9 passes through a hole in the center of the step 5121. So that the return spring 9 generates a spring force between the screw 6 and the clutch slider 53. Due to the addition of the return spring 9, in the self-unlocking process, the component force F2 needs to overcome the elastic forces of the clutch elastic element 52 and the return spring 9 to realize the unlocking action.

The invention also relates to a circuit breaker drawer base, which is provided with the circuit breaker drawer base, wherein the drawer base 1 comprises an external shell 200, a handle 100, a clutch mechanism 5, a transmission assembly 4 and a screw rod 6, the clutch mechanism 5 is used for establishing or breaking a transmission relation between the transmission assembly 4 and the screw rod 6, and a locking plate 300 is arranged on the external shell 200; under the normal working state, the clutch mechanism 5 and the screw rod 6 realize synchronous rotation, and the clutch mechanism 5 can slide on the screw rod 5; a return spring 9 provides the clutch mechanism 5 with a driving force combined with the transmission assembly 4; after the handle 100 is inserted, the handle 100 pushes the locking plate 300, the locking plate 300 moves and separates the clutch mechanism 5 from the transmission component 4, after the handle 100 is inserted in place, the locking plate 300 abuts against the handle 100, and the clutch mechanism 5 abuts against the locking plate 300 in the telescopic direction, so that the locking plate 300 bears the outward thrust of the reset spring 9 on the clutch mechanism 5.

Continuing with fig. 12, the handle 100 is a trigger device for switching between electric drive and manual drive, i.e. after the handle 100 is inserted and the handle 100 is pushed into place, the locking plate 300 separates the clutch mechanism 5 from the transmission assembly 4, and in particular, the clutch slider 53 of the clutch mechanism 5 is disengaged from the transmission gear 41 of the transmission assembly 4. At this time, the clutch mechanism 5 is in the "on" state, and the circuit breaker is in the manual driving mode, and the handle 100 drives the circuit breaker body to move in the drawer base 1. When the manual mode needs to be switched to the electric mode, an operator only needs to pull out the handle 100, at this time, due to the pulling-out of the handle 100, the locking plate 300 is reset under the action of self-restoring force, so that the locking plate 300 no longer blocks the linkage 51 of the clutch mechanism 5, the reset spring 9 pushes out the clutch mechanism 5, and the clutch sliding part 53 of the clutch mechanism 5 is combined with the transmission gear 41 of the transmission assembly 4. At this time, the clutch mechanism 5 is in an "on" state. The circuit breaker switches to an electric drive mode. So that the circuit breaker body is driven by the motor 3 to move in the drawer base 1.

The handle 100 comprises a handle head 101, the handle head 101 is hexagonal and used for being clamped with the handle clamping hole 513, and therefore the shape of the handle head 101 is matched with that of the handle clamping hole 513, so that the handle head and the handle clamping hole can rotate synchronously after being clamped, and the handle can not be separated. The shapes of the two are not limited to hexagon, and can be other shapes capable of being clamped. Such as square, triangular, pentagonal, hexagonal, etc.

As shown in fig. 11 and 13, during the pushing-in process of the handle head 101, the handle head 101 pushes the locking plate 300 to move, and during the moving process, the locking plate 300 overcomes the elastic force of the return spring 9 and pushes the clutch mechanism 5 to disengage from the transmission assembly 4, i.e. to compress the return spring 9. Specifically, after the locking plate 300 pushes the linkage 51 on the clutch mechanism 5 to move leftward, the pair of sliding grooves 514 on the linkage 51 move along with the linkage 51 and drive the clutch slider 53 to disengage from the engaging cavity 4121, so that the clutch mechanism 5 and the transmission gear 41 are disengaged from each other. After the handle 100 is pulled out, the clutch slider 53 moves to the right side of the figure under the bias of the return spring 9 until the engaging head 533 of the clutch slider 53 is inserted into the snap-fit cavity 4121, so that the clutch mechanism 5 and the transmission gear 41 are in a transmission relationship.

Based on the idea of the invention or the technical teaching, if the screw rod 6 and the clutch mechanism 5 are provided with the matching structure of the snap fit cavity and the matching head, specifically, the screw rod 6 is provided with the snap fit cavity, the snap fit cavity is an angle expanding cavity, and the clutch mechanism 5 is the same as the above scheme but has an opposite direction, and the matching head 533 on the clutch slider 53 and the snap fit cavity on the screw rod 6 realize the snap fit. When the clutch mechanism 5 is in an on state, the matching head 533 on the clutch sliding piece 53 is clamped into the clamping cavity of the screw rod 6 to realize synchronous rotating clamping connection; when the lead screw 6 is locked and can not rotate, the matching head 533 is driven by the motor 3 to be withdrawn from the clamping concave cavity outwards, so that the motor 3 is prevented from being locked. Features of the first embodiment may also be employed with this embodiment, for example: the clutch elastic member 52 has one end abutting against the link member 51 and the other end abutting against the clutch slider 53. The elastic clutch member 52 is a cylindrical spring, and one end of the elastic clutch member 52 abuts against the step 5121 on the inner surface of the accommodating chamber 512, and the other end abuts against the sliding clutch member 53. The clamping concave cavity 4121 is arranged in a flaring mode. The angle of the flare is 0 ° to 180 °, preferably 0 ° to 120 °, more preferably 60 °, to facilitate self-release of the two in the event of jamming. The above-described embodiments are simple modifications, and can achieve the effects expected by the present invention. Belonging to the protection scope of the invention.

As shown in fig. 14 and 15. The drawer base 1 further comprises an outer casing 200, wherein the outer casing 200 is a plastic part, and is usually formed by injection molding. The external housing 200 is installed on the front side of the bottom plate 11, specifically, an installation flange is installed on one side of the bottom plate 11 close to the front side of the circuit breaker, and the external housing 200 is installed on the installation flange. The locking piece 300 is slidably disposed on the outer housing 200, but the locking piece 300 may be rotatably disposed. The locking plate 300 may be a plastic piece, a fixing bracket 301 is disposed on the locking plate 300, a return spring 302 is mounted on the fixing bracket 301, and the fixing bracket 301 is in a frame shape. The return spring 302 is horizontally arranged relative to the locking plate 300, and two ends of the return spring 302 are clamped on two opposite inner sides of the fixing bracket 301. And the diameter of the return spring 302 is larger than the thickness of the fixing bracket 301, so that when the locking plate 300 moves horizontally, the return spring 302 collides with the protrusion 201 of the outer case 200 and the protrusion 201 presses the return spring 302. So that when the locking plate 300 is moved to one side, the return spring 302 is compressed after being pressed by the protrusion 201 of the outer housing 200, and generates an elastic force for returning the locking plate 300. The outer housing 200 has a sliding groove cavity 202 for the sliding arrangement of the locking plate 300, and the outer housing 200 has a protrusion 203 protruding into the sliding groove of the locking plate 300, and the protrusion 203 cooperates with the sliding groove of the locking plate 300 to limit the sliding distance of the locking plate 300. More specifically, the sliding groove cavity 202 is a cavity facing the bottom plate 11, and the other side of the locking plate 300 is attached to the mounting flange of the bottom plate 11 after being placed therein, so that the locking plate 300 cannot be separated after the housing 200 is mounted.

When the locking plate 300 is in the initial position, i.e. the position not pushed by the handle 100, this position may be referred to as the first position, and when said locking plate 300 is pushed by said handle 100 and disengages said clutch mechanism 5 from the transmission assembly 4, the position of the locking plate 300 is referred to as the second position. The movement of the locking tab 300 between the first and second positions may be sliding or rotating. Meanwhile, the moving mode of the locking plate 300 can be driven by manpower or the locking plate 300 can be moved by inserting or pulling out the handle 100. The following description is provided to illustrate the technical solution of the handle 100 moving the locking plate 300. When the locking plate 300 is driven by manual force, the operator pulls the locking plate 300 from the first position to the second position, and then inserts the handle 100 to abut against the locking plate 300 in the transverse direction, thereby preventing the locking plate 300 from leaving the second position. When the handle 100 is used to drive the locking plate 300, the handle 100 drives the locking plate 300 to move in the process of inserting the handle 100, and after the locking plate 300 moves to the second position, the handle 100 is inserted in place, and the handle 100 abuts against the locking plate 300 in the transverse direction. When the locking plate 300 is in the first position, the clutch mechanism 5 and the transmission assembly 4 establish a transmission relationship; when the locking plate 300 is in the second position, the clutch mechanism 5 is disengaged from the driving assembly 5.

Under the normal working state, the clutch mechanism 5 and the screw rod 6 realize synchronous rotation, and the clutch mechanism 5 can slide on the screw rod 6; a return spring 9 provides the clutch mechanism 5 with a driving force combined with the transmission assembly 4; the locking tab 300 is laterally movable between a first position and a second position; when the locking piece 300 is in the first position, the clutch mechanism 5 is combined with the transmission assembly 4; when the handle 100 is inserted in place, the locking plate 300 is in the second position, the locking plate 300 abuts against the side surface of the handle 100, and the acting force of the return spring 9 acts on the locking plate 300 through the clutch mechanism 5 in the vertical direction. The transverse direction refers to the transverse section direction of the screw rod 6, or the horizontal direction of the circuit breaker. Correspondingly, the vertical direction refers to the axial direction along the screw rod 6, or the front and back direction along the circuit breaker.

The locking piece 300 is provided with a handle through hole 304, and the side of the locking piece 300 facing the outside is provided with a pushing outer edge boss 303. Specifically, a pushing outer edge boss 303 is arranged on one side of the handle passing hole 304 facing the outside, a pushing inclined wedge surface 3031 is arranged on the pushing outer edge boss 303, and the handle head 101 pushes the pushing inclined wedge surface 3031 to drive the locking plate 300 to move; an abutting part 305 is arranged on one side of the handle passing through hole 304 facing inwards, an abutting wedge surface 3051 is further arranged on the abutting part 305, preferably, an abutting plane 3052 is further arranged on the abutting part 305, and the abutting wedge surface 3051 is connected with the abutting plane 3052, namely the clutch mechanism 5 abuts against the abutting plane before the abutting wedge surface 3051, and when the handle moves to the second position, the clutch mechanism 5 abuts against the abutting plane. For the solution of manually driving the locking piece 300, the abutting portion 305 and the abutting wedge surface 3051 are required, and the pressing outer edge boss 303 and the pressing wedge surface 3031 are used for cooperating with the handle 100, which can be omitted. Moreover, the abutting plane 3052 is a preferable scheme, that is, when the abutting plane 3052 is disposed on the abutting portion 305, when the locking plate 300 moves to the second position, the clutch mechanism 5 abuts against the abutting plane 3052, and the specific linkage member 51 abuts against the abutting plane 3052, because the abutting plane 3052 is a plane, the elastic force of the return spring 9 in the vertical direction is not resolved into the transverse direction, so that the driving force for driving the locking plate 300 to move is greatly reduced, and the operation is facilitated.

The specific action of the handle 100 to drive the locking piece 300 is as follows: when the locking piece 300 is at the initial position, the handle passing hole 304 and the handle clamping hole 513 are arranged in a staggered manner. The handle 100 is inserted. When the handle head 101 is plugged into the handle through hole 304, the handle head 101 pushes the pushing wedge surface 3031 first, so that the handle through hole 304 is aligned with the handle clamping hole 513. During the alignment process, during the process that the handle head 101 pushes the pushing wedge surface 3031 and drives the locking plate 300 to move, the abutting part 305 on the handle head moves along with the locking plate 300, and the abutting wedge surface 3051 on the abutting part 305 pushes the linkage piece 51 to move towards the inside of the circuit breaker, so that the linkage piece 51 drives the clutch sliding piece 53 to be separated from the contact with the clamping concave cavity 4121. At this time, the movement of the circuit breaker body relative to the drawer base 1 is converted to the driving by the handle 100. Specifically, the abutting wedge surface 3051 pushes the linkage member 51 to retract toward the inside of the circuit breaker in the vertical direction, and the pair of sliding grooves 514 on the linkage member 51 push the clutch slider 53 in the sliding groove 514, so that the engaging head 533 on the clutch slider 53 is disengaged from the engaging cavity 4121, and the clutch mechanism 5 is in the "disengaged" state.

When the handle 100 is inserted into position, the handle 100 is in a stable state. At this time, the locking piece 300 laterally abuts against the handle 100. Specifically, the handle of the locking plate 300 abuts against the side of the handle 100 through the inner side of the hole 304, so that the locking plate 300 cannot return to the original state, i.e., the return spring 302 cannot return the locking plate 300. The locking tab 300 is now stabilized in the second position. And the link member 51 of the clutch mechanism 5 abuts against the lock plate 300. The link 51 is prevented from extending because of abutment. Therefore, the engaging rod 532 and the engaging head 533 of the clutch slider 53 are blocked by the pair of sliding grooves 514 of the link 51, and the vertical force of the return spring 9 is applied to the lock plate 300 through the clutch slider 53 and the link 51. Therefore, when the operator manually drives the movement of the circuit breaker body with respect to the drawer base 1 by shaking the handle 100, the driving operation can be completed by applying a force for shaking the handle 100 without pressing the handle 100 against the elastic force of the return spring 9.

In the case where the handle 100 drives the circuit breaker body to move relative to the drawer base as described above, the handle 100 is pulled out, and at this time, the locking piece 300 is returned to the first position by the restoring force of the restoring spring 302. Meanwhile, the abutting portion 305 no longer abuts against the linkage member 51, so that the return spring 9 pushes out the clutch sliding member 53, the linkage member 51 and the clutch elastic member 52, and forces the clutch sliding member 53 to be clamped into the clamping cavity 4121, thereby realizing the driving connection of the clutch mechanism 5 and the transmission assembly 4. So that the clutch 5 is in the "on" state. The circuit breaker is rotated to an electrically driven mode. If the abutting portion 305 only has the abutting wedge surface 3051 but not the abutting plane 3052, the vertical acting force of the return spring 9 can generate a transverse component force through the abutting wedge surface 3051, and the component force can cause the locking plate 300 to return, and at this time, the return spring 302 does not need to be provided to provide the return force.

On one hand, the invention creates the characteristic that the clamping concave cavity 4121 is arranged in an angle expanding manner, so that when the transmission structure in the drawer seat 1 is clamped, the clutch mechanism 5 can be separated from the transmission assembly 4 or the screw rod 6, and the motor 3 can drive the transmission gear 41 of the transmission assembly 4 to idle, so that the motor 3 cannot be clamped and burnt.

On the other hand, since the handle 100 is inserted in place, the force of the return spring 9 is converted into a restoring force of the latch in the transverse plane of the circuit breaker, which is blocked by the side of the handle 100. When the handle 100 is rotated by a manual force, the operator does not need to overcome the force from the return spring 9 in the vertical direction of the circuit breaker, i.e., the handle 100 does not come out by itself. Making it easier and simpler for the operator to shake the handle 100.

Claims

1. The utility model provides a circuit breaker drawer seat, drawer seat (1) includes an outside casing (200), handle (100), clutching mechanism (5), drive assembly (4) and lead screw (6), clutching mechanism (5) be used for establishing or break off the transmission relation between drive assembly (4) and lead screw (6), its characterized in that: a locking plate (300) is arranged on the outer shell (200); the clutch mechanism (5) and the screw rod (6) realize synchronous rotation, and the clutch mechanism (5) can vertically slide on the screw rod (6); a return spring (9) provides driving force for the clutch mechanism (5) to be combined with the transmission assembly (4); the locking tab (300) is laterally movable between a first position and a second position; when the locking plate (300) is in the first position, the clutch mechanism (5) and the transmission component (4) establish a transmission relation; in the process that the locking plate (300) moves from the first position to the second position, the locking plate (300) pushes the clutch mechanism (5) to vertically move on the screw rod (6); locking plate (300) are in the second position, clutching mechanism (5) and drive assembly (4) disconnection transmission relation, handle (100) with clutching mechanism (5) joint, locking plate (300) support and lean on the side at handle (100) on the transverse direction.

2. The circuit breaker drawer base according to claim 1, wherein the locking plate (300) is provided with a handle through hole (304), an abutting portion (305) is provided at one side of the handle through hole (304) facing inward, the abutting portion (305) is further provided with an abutting wedge surface (3051), and the abutting wedge surface (3051) is used for pushing the clutch mechanism (5) to be disengaged from the transmission assembly (4).

3. The circuit breaker drawer base according to claim 1, wherein the locking tab (300) is manually actuated, and the handle (100) is inserted after the locking tab (300) is manually moved from the first position to the second position.

4. The circuit breaker drawer base according to claim 1, wherein the locking tab (300) is actuated by a handle (100) and inserted into the handle (100), the locking tab (300) being actuated by the handle (100) to move from the first position to the second position.

5. The circuit breaker drawer holder according to claim 2, wherein the abutting portion (305) further comprises an abutting surface (3052), and when the locking plate (300) enters the second position, the abutting surface (3052) abuts against the clutch mechanism (5); the locking plate (300) comprises a return spring (302), and the return spring (302) provides the locking plate (300) with a return force for moving from the second position to the second position.

6. The circuit breaker drawer base according to claim 1, characterized in that the clutch mechanism (5) comprises a linkage member (51) and a clutch slider (53), the clutch slider (53) is located on the linkage member (51) and can slide relative to the linkage member (51), the transmission assembly (4) comprises a transmission gear (41), one end of the return spring (9) is abutted against the lead screw (6), and the other end is abutted against the clutch slider (53).

7. The circuit breaker drawer base according to claim 6, characterized in that the clutch mechanism (5) further comprises a clutch elastic member (52), one end of the clutch elastic member (52) abuts against the linkage member (51), and the other end abuts against the clutch sliding member (53); the clutch mechanism is characterized in that sliding grooves (514) are formed in two opposite sides of the cylindrical surface of the linkage piece (51), the sliding grooves (514) are closed grooves, two ends of the clutch sliding piece (53) extend out of the sliding grooves (514), and the sliding of the clutch sliding piece (53) is limited by the sliding grooves (514).

8. A circuit breaker drawer base according to claim 5, characterized in that the drawer base (1) comprises a base plate (11), the outer casing (200) is mounted on the front side of the base plate (11), a fixing bracket (301) is arranged on the locking plate (300), the return spring (302) is arranged on the fixing bracket (301), the return spring (302) is horizontally arranged relative to the locking plate (300), and the two ends of the return spring (302) are clamped at the two opposite inner sides of the fixed bracket (301), the diameter of the return spring (302) is larger than the thickness of the fixed bracket (301), when the locking piece (300) moves horizontally, the return spring (302) collides with the protrusion (201) of the outer housing (200), and the protrusion (201) presses the return spring (302).

9. The drawer base of the circuit breaker according to claim 4, wherein a pushing outer edge boss (303) is provided on one side of the locking piece (300) facing to the outside, a pushing inclined wedge surface (3031) is provided on the pushing outer edge boss (303), and the handle head (101) at the end of the handle (100) pushes the pushing inclined wedge surface (3031) to drive the locking piece (300) to move.

10. The circuit breaker drawer base according to claim 7, characterized in that the clutch slider (53) comprises a sliding cylinder (531), a coupling rod (532) and a coupling head (533), the coupling rod (532) is inserted into the sliding cylinder (531) and protrudes out of both sides of the sliding cylinder (531); the matching head (533) is sleeved at two ends of the matching rod (532).

11. The circuit breaker drawer base according to claim 10, wherein the sliding cylinder (531) is a cylinder, the engaging rod (532) radially passes through the corresponding hole (5312) of the sliding cylinder (531) and both ends of the engaging rod (532) extend through the sliding slot (514), and then the engaging head (533) is sleeved on both ends of the engaging rod (532).

12. The circuit breaker drawer base according to claim 7, characterized in that the linkage member (51) is a circular tubular part, one end of the linkage member (51) is provided with a clamping hole (511) matched with the screw rod (6), the other end of the linkage member (51) is provided with a handle clamping hole (513) matched with the handle (100), and an accommodating cavity (512) for accommodating the clutch elastic member (52) and the clutch sliding member (53) is arranged between the clamping hole (511) and the handle clamping hole (513).

13. The circuit breaker drawer base according to claim 3 or 4, characterized in that the inside of the handle passing hole (304) of the locking tab (300) abuts against the side of the handle (100) when the handle (100) is inserted into position.