CN210744595U - Chassis car for circuit breaker - Google Patents

Abstract

The utility model relates to the technical field of circuit breakers, in particular to a chassis for a circuit breaker, which comprises a chassis body, threaded holes arranged in the middle parts of two opposite side walls of the chassis body, and a screw rod capable of passing through the two threaded holes; the screw rod is in threaded connection with the two threaded holes, an axially extending open slot is formed in the extending end of the screw rod, and a driving assembly is inserted into the open slot, wherein when the driving assembly contracts into the open slot, the driving assembly can block the open slot; when drive assembly expands from the open slot, drive assembly forms one and is suitable for the drive lead screw pivoted handle can accomodate drive assembly in the open slot when not needing to use, also can directly pull out drive assembly open slot just can directly use when needs use, does not need external box spanner, simple structure, and is easy and simple to handle.

Description

Chassis car for circuit breaker

Technical Field

The utility model relates to a technical field of circuit breaker, concretely relates to chassis for circuit breaker.

Background

Chinese patent CN206283172U is an interlocking device for chassis vehicle and breaker closing mechanism, which includes: the chassis comprises a chassis vehicle, a chassis vehicle screw rod, a chassis vehicle turning plate, a mechanism side plate, a mechanism interlocking plate and a clamping jaw; the chassis turning plate moves upwards when an external circuit breaker operator inserts the chassis turning plate and shakes in or out of the chassis, the mechanism interlocking plate is mounted on the mechanism side plate, the top of the chassis turning plate is aligned with the mechanism interlocking plate, and the mechanism interlocking plate locks a clamping jaw when moving upwards; the tripping half shaft of the mechanism can not act, so that the circuit breaker can not carry out closing operation. The utility model discloses a when the chassis car turns over the board and lifts up, turn over the board and directly withstand the interlock board of mechanism, the mechanism is simple reliable, and it is convenient to maintain.

Wherein, through behind the external sleeve of lead screw in this application, rethread hand sleeve makes the lead screw rotate in order to realize the advance of handcart, go out the demand, because lead screw and sleeve set up for the components of a whole that can function independently, during the use, need find the sleeve of this lead screw of adaptation earlier, the adaptation requirement is higher, embolias the lead screw with the sleeve and then hand sleeve, and the operation is more complicated for the circuit breaker can not be timely switching-on operation.

In order to solve the above problems, it is necessary to design a chassis for a circuit breaker that is convenient to operate.

Disclosure of Invention

In order to solve the problem that the rotation of the driving screw rod is difficult in the prior art, the utility model provides a chassis for circuit breaker solves above-mentioned problem.

The utility model provides a technical scheme that its technical problem adopted is: a chassis for a circuit breaker comprises a chassis body, threaded holes formed in the middles of two opposite side walls of the chassis body, and a screw rod capable of penetrating through the two threaded holes; the screw rod is in threaded connection with the two threaded holes, an axially extending open slot is formed in the extending end of the screw rod, and a driving assembly is inserted into the open slot, wherein when the driving assembly contracts into the open slot, the driving assembly can block the open slot; when the driving assembly is unfolded from the open slot, the driving assembly forms a handle which is suitable for driving the screw rod to rotate.

Further, the driving assembly comprises a protruding part arranged along the open slot in a sliding mode, and a hand cranking part hinged to the protruding end of the protruding part; the inner wall of the open slot is provided with a limit slot; the extending part comprises a limiting block matched with the limiting groove; when the hand-cranking part is contracted, the hand-cranking part can be retracted into the limiting groove; when the hand-cranking portion is unfolded, the hand-cranking portion can drive the screw rod to rotate through the limiting block.

Further, the extension portion includes an extension bar extending axially along the open slot;

the limiting block is fixed on the outer side wall of the extension rod and is positioned at one end, in the open slot, of the extension rod; a baffle is fixed on the inner wall of the middle part of the open slot; the baffle can block the limiting block from sliding out of the limiting groove.

Further, the hand cranking portion includes: the two hinged seats are fixed on the outer wall of the extending end of the extending rod in parallel, and the handheld rod is rotatably connected between the two hinged seats; the inner side walls of the two hinged seats and the side wall of the limiting groove are in the same plane; when the handheld rod is attached to the extension rod, the handheld rod can retract into the limiting groove until the handheld rod is blocked by the hinge seat; the hand-held pole forms the handle when the hand-held pole is deployed.

Furthermore, two sides of the handheld rod are provided with buckling grooves corresponding to five fingers respectively; the hand-held rod is driven to rotate by taking the extension rod as a center through the fact that the fingers are fastened in the corresponding fastening grooves.

Furthermore, a stop block is arranged on the inner side of any hinged seat; wherein the stopper is capable of stopping the hand-held lever from being unfolded until an angle between the hand-held lever and the extension lever exceeds 90 ° when the hand-held lever is unfolded.

Furthermore, a travel switch is fixedly connected in the chassis body; and two sides of the travel switch are respectively provided with a connecting rod assembly extending to the lower part of the screw rod; the lead screw can trigger the probe corresponding to the travel switch through the corresponding connecting rod assembly.

Furthermore, a trigger block is installed at one end, far away from the extending end, of the screw rod, and the connecting rod assembly comprises a trigger seat and a linkage rod group, wherein the trigger seat is located below the screw rod, and the two ends of the linkage rod group are respectively connected with the trigger seat and a probe of the travel switch; the middle part of the trigger seat is downwards sunken with a concave part matched with the trigger block; when the screw rod is rotated, the trigger block can be linked with the connecting rod assembly to trigger the probe of the corresponding travel switch.

Furthermore, a sliding seat is arranged at the extending end of the lead screw on the chassis body; the middle part of the sliding seat is provided with a guide sleeve which is rotationally connected with the screw rod; the sliding seat is fixedly connected with a sliding rail extending to the inner part of the chassis body; when the screw rod is rotated, the sliding seat can slide through the sliding rail.

The beneficial effects of the utility model are that, the utility model provides a chassis car for circuit breaker sets up a drive assembly who is connected with the lead screw is an organic whole at the end that stretches out of lead screw, drive assembly can drive the lead screw rotates in order to realize that the lead screw stretches out the chassis body or retracts the chassis body, wherein lie in the end that stretches out of lead screw and set up an open slot, this open slot is the counter bore, drive assembly pegs graft in the open slot, and can slide along the open slot, specifically, when the lead screw does not need to rotate, drive assembly can contract and retract along the open slot and retract to the open slot in, and drive assembly can plug up the open slot, avoid external dust to get into the open slot and gather in the open slot and influence the smooth nature of the slip of drive assembly in the open slot, guaranteed the drive performance of drive assembly to the lead; when the lead screw needs to rotate, drive assembly follows open slot roll-off expands drive assembly to forming a handle shape, and through the circumferential direction handle, the drive lead screw rotates, and such design can accomodate drive assembly in the open slot when need not using, also can directly pull out the open slot with drive assembly when needs use and just can directly use, does not need external socket spanner, simple structure, and is easy and simple to handle.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic structural diagram of a preferred embodiment of a chassis for a circuit breaker according to the present invention;

FIG. 2 is a schematic structural diagram of a preferred embodiment of the drive assembly of the present invention;

FIG. 3 is a schematic view, partly in section, of a preferred embodiment of the drive assembly of the present invention in the deployed state;

FIG. 4 is a schematic view, partly in section, of the preferred embodiment of the drive assembly of the present invention in a collapsed condition;

FIG. 5 is a schematic structural view of the preferred embodiment of the present invention with the screw extended;

FIG. 6 is a schematic structural view of a preferred embodiment of the trigger probe front link assembly of the present invention;

fig. 7 is a schematic structural diagram of a preferred embodiment of the rear link assembly of the trigger probe of the present invention.

In the drawings

The chassis body 1 and the threaded hole 11;

the lead screw comprises a lead screw 2, an open slot 21, a limit slot 22, a trigger block 23 and a fixing hole 24;

the driving assembly 3, the extension part 31, the limit block 311, the extension rod 312, the baffle 313, the hand-cranking part 32, the hinge seat 321, the handheld rod 322, the buckle groove 3221 and the stop block 323;

a travel switch 4, a probe 41;

the connecting rod assembly 5, the trigger seat 51, the concave part 511 and the linkage rod group 52;

slide block 6, guide sleeve 61, slide rail 62.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention. On the contrary, the embodiments of the invention include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used only for convenience in describing and simplifying the present invention, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present invention includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present invention.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a chassis for a circuit breaker according to a preferred embodiment of the present invention; as shown in fig. 1, the utility model provides a chassis vehicle for circuit breaker, which comprises a chassis body 1 and a lead screw 2, wherein the lead screw 2 can vertically pass through the middle part of one side wall to the other opposite side wall, specifically, a threaded hole 11 is respectively arranged at the middle part of the opposite group of side walls of the chassis body 1, the lead screw 2 passes through the threaded hole 11 and is in threaded connection with the chassis body 1, the lead screw 2 can retract into the chassis body 1 or extend out of the chassis body 1 by forward and reverse rotation, i.e. the lead screw 2 can keep threaded connection with the threaded hole 11 of the extending end of the chassis body 1, and the lead screw 2 can be disconnected from the other threaded hole 11 of the chassis body 1 during extending, and during daily use, because the frequency of extending and retracting of the lead screw 2 is low, a hexagonal protrusion is generally arranged at the extending end of the lead screw 2, and only a corresponding socket wrench is found to drive the lead screw 2 to rotate before the lead screw 2 is, this need be preserved corresponding box spanner, generally can directly fix box spanner at the lateral wall of chassis body 1, nevertheless because lead screw 2 sets up with the spanner components of a whole that can function independently still and easily takes place box spanner and loses the unable pivoted condition of drive lead screw 2, in order to solve above-mentioned problem, need adopt following scheme:

the driving assembly 3 is connected with the screw rod 2 and arranged at the extending end of the screw rod 2, the driving assembly 3 can drive the screw rod 2 to rotate so as to enable the screw rod 2 to extend out of the chassis body 1 or retract into the chassis body 1, wherein an open slot 21 is formed in the extending end of the screw rod 2, the open slot 21 is a counter bore, the driving assembly 3 is inserted into the open slot 21 and can slide along the open slot 21, specifically, when the screw rod 2 does not need to rotate, the driving assembly 3 can retract and retract into the open slot 21 along the open slot 21, and the driving assembly 3 can block the open slot 21, so that external dust is prevented from entering the open slot 21 and accumulating in the open slot 21 to influence the sliding smoothness of the driving assembly 3 in the open slot 21, and the driving performance of the driving assembly 3 on the screw rod 2 is guaranteed; when the lead screw 2 needs to rotate, drive assembly 3 is followed open slot 21 roll-off expands drive assembly 3 to forming a handle shape, through the circumference turning handle, drives lead screw 2 and rotates, and such design can accomodate drive assembly 3 in open slot 21 when need not use, also can directly pull out drive assembly 3 open slot 21 when needs use and just can directly use, does not need external socket spanner, simple structure, and is easy and simple to handle.

Referring to fig. 2 to 4, fig. 2 is a schematic structural diagram of a preferred embodiment of the driving assembly of the present invention; FIG. 3 is a schematic view, partly in section, of a preferred embodiment of the drive assembly of the present invention in the deployed state; FIG. 4 is a schematic view, partly in section, of the preferred embodiment of the drive assembly of the present invention in a collapsed condition; as shown in fig. 1 to 4, optionally, drive assembly 3 includes along the extension 31 that open slot 21 slides and sets up articulates the hand portion 32 of the end that extends out of extension 31, and the taking in and the expansion of drive assembly 3 are hand portion 32 laminating extension 31 or hand portion 32 and extension 31 for an contained angle is 90 handles, and is specific through rotating hand portion 32 linkage extension 31 drives lead screw 2 and rotates and adopts following mode: the side wall of the open slot 21 is provided with a limit slot 22 protruding upwards, the extension part 31 is internally provided with a limit block 311 inserted in the limit slot 22, the limit block 311 is matched with the limit slot 22 to limit the relative circumferential rotation of the extension part 31 and the screw rod 2, so that the screw rod 2 rotates when the extension part 31 rotates, and the rotation of the extension part 31 can be realized by driving the circumferential rotation of the handle when the hand-cranking part 32 is unfolded to form a handle with the extension part 31.

Optionally, the extension portion 31 includes an extension rod 312 extending axially along the open slot 21, the lead screw 2 is driven to rotate by rotation of the extension rod 312, the hand-cranking portion 32 is installed at an extension end of the extension rod 312, the limit block 311 is installed at the other end of the extension rod 312, during a sliding process of the extension rod 312 in the open slot 21, if the extension rod 312 slides out of the open slot 21, the extension rod 312 and the lead screw 2 are still arranged in a separated manner, that is, the hand-cranking portion 32 may be lost after being detached, in order to solve the above problem, a baffle 313 extending inwards from the limit slot 22 is arranged at an axial center of the open slot 21, that is, a sliding range of the extension rod 312 is a distance from a slot bottom of the open slot 21 to the baffle 313, when the extension rod 312 slides out of the open slot 21, the extension rod can be naturally blocked by the baffle 313 and cannot slide out of the open slot, namely, the screw rod 2 can be driven to rotate rapidly by the hand-cranking portion 32.

In this embodiment, if the baffle 313 is directly installed in the limiting groove 22, the protruding rod 312 cannot touch the groove bottom of the opening groove 21 when being installed, the opening groove 21 is axially provided with a fixing hole 24, when being installed, the protruding rod 312 is firstly installed in the opening groove 21, after the limiting block 311 passes through the fixing hole 24, the baffle 313 is inserted into the limiting groove 22, after the baffle 313 moves to the position of the fixing hole 24, the baffle 313 directly passes through the fixing hole 24 through a screw, which is an installation form for fixing the position of the baffle 313, and a plurality of fixing holes may be additionally provided to adjust the position of the baffle 313.

Optionally, the hand cranking portion 32 includes: the two hinged seats 321 are arranged in parallel, the handheld rod 322 is rotatably connected between the two hinged seats 321, the two hinged seats 321 are fixed on the outer wall of the extension rod 312, and the two hinged seats 321 are respectively positioned on two sides of the limit groove 22, specifically, when the handheld rod 322 rotates around the hinged point of the handheld rod 322 and the hinged seats 321 to be attached to the extension rod 312, the shape of the handheld rod 322 corresponds to the limit groove 22, the handheld rod 322 can retract into the limit groove 22, namely, the handheld rod 322 is in a storage state, at this time, the extension rod 312 blocks the open groove 21, the handheld rod 322 blocks the limit groove 22, otherwise, when the handheld rod 322 and the extension rod 312 form an angle, the handheld rod 322 is in an expansion state, further, when the handheld rod 322 and the extension rod 312 form an angle of 90 degrees, the effect of driving the extension rod 312 to rotate through the handheld rod 322 is the best, so as to facilitate the handheld rod 322 to be quickly switched between the storage state and the expansion state, thereby being convenient for the screw rod 2 to be driven to rotate quickly.

In this embodiment, the two hinged seats 321 have the greatest proximity, and only the inner side walls of the hinged seats 321 and the side walls of the limiting groove 22 are coplanar, and after the handheld rod 322 retracts into the limiting groove 22, the two hinged seats 321 can protrude out of the limiting groove 22, so that the extension rod 312 slides out of the handheld rod 322 in a storage state, specifically, the two hinged seats 321 form a handle to provide a stress point, and the extension rod 312 can be easily taken out by manually holding the hinged seats 321 with an outward force.

Preferably, in order to further facilitate the rotation of the driving screw rod 2, two sides of the handheld rod 322 are provided with fastening grooves 3221 corresponding to five fingers respectively; specifically, the right side of the handheld lever 322 is provided with four retaining grooves 3221, which correspond to the distance between the index finger, the middle finger, the ring finger and the little finger, respectively, the left side of the handheld lever 322 is provided with one retaining groove 3221, and the retaining grooves 3221 correspond to the thumb, so that the handheld lever 322 can be held by one hand to exert force when the handheld lever 322 is used, meanwhile, the hand can have a larger contact area with the handheld lever 322, the friction force between the hand and the handheld portion is larger, the controllability for driving the handheld lever 322 to rotate in the circumferential direction is better, and the force exerting direction of the hand needs to be adjusted according to the rotation of the handheld lever 322 to different positions.

Optionally, the longitudinal section of the hinge seat 321 is composed of a semicircle and a rectangle, a pin shaft located in a rectangular region is fixed between the two hinge seats 321, the pin shaft passes through an end portion of the handheld rod 322, and an end of the handheld rod 322 only rotates in the rectangular region during the unfolding process, so that a stopper 323 can be arranged in the semicircular region, when the handheld rod 322 rotates to 90 ° with the extension rod 312, the stopper 323 can contact with the handheld rod 322, the stopper 323 is arranged at the position so as to prevent the handheld rod 322 from unfolding, but at the same time, the angle between the handheld rod 322 and the extension rod 312 can be limited to only rotate to 90 °, if the angle exceeds 90 ° can be blocked by the stopper 323, and thus when the handheld rod 322 is manually rotated, the best driving effect can be achieved, so as to improve the controllability of the manual screw rod 2.

Please refer to fig. 5, fig. 5 is a schematic structural diagram of the preferred embodiment of the present invention when the screw rod is extended; as shown in fig. 1 to 5, optionally, a travel switch 4 is fixedly connected in the chassis body 1, a probe 41 extends from each of the upper and lower sides of the travel switch 4, the corresponding probe 41 is toggled to trigger the on/off of the travel switch 4, the probe 41 is correspondingly connected to a link assembly 5, the two link assemblies 5 respectively correspond to the two threaded holes 11, and the link assembly 5 is located inside the chassis body 1, in the rotation process of the lead screw 2, the lead screw 2 can pull the two link assemblies 5 to sequentially trigger the two probes 41, specifically, in the process of extending the lead screw 2 out of the chassis body 1, the probe 41 linked with the extending end of the lead screw 2 is then triggered, in the process of retracting the lead screw 2 into the chassis body 1, the probe linked with the extending end of the lead screw 2 is then triggered.

Referring to fig. 6 and 7, fig. 6 is a schematic structural view of a preferred embodiment of the front connecting rod assembly of the trigger probe according to the present invention; FIG. 7 is a schematic structural view of a preferred embodiment of the rear link assembly of the trigger probe of the present invention; as shown in fig. 1 to 7, optionally, a trigger block 23 is mounted at one end of the screw rod 2 away from the extended end, and the link assembly 5 includes a trigger seat 51 located below the screw rod 2, and a linkage rod group 52 having two ends respectively connected to the trigger seat 51 and the probe 41 of the travel switch 4; the middle part of the trigger seat 51 is downwards sunken with a concave part 511 matched with the trigger block 23; when the screw rod 2 is rotated, the trigger block 23 can make the trigger base laterally move by pulling the concave part 511, and the probe 41 of the corresponding travel switch 4 is triggered in a linkage manner through the linkage rod group 52 after the trigger base laterally moves.

It should be noted that, in the process that the screw rod 2 extends out of the chassis body 1, the screw rod 2 is only meshed with the threaded hole 11 of the extending end, the extending linearity of the screw rod 2 cannot be guaranteed, and if the screw rod 2 deviates from the straight line and extends out of the chassis body 1, the structure of the corresponding threaded hole 11 is damaged, in order to solve the above problems, the following scheme is adopted, wherein the sliding seat 6 is arranged at the extending end of the screw rod 2 of the chassis body 1; the middle part of the sliding seat 6 is provided with a guide sleeve 61 which is rotationally connected with the screw rod 2, and the screw rod 2 is supported at two points through the guide sleeve 61 and the threaded hole 11 at the extending end, so that the extending linearity of the screw rod 2 is ensured; the sliding seat 6 is fixedly connected with a sliding rail 62 extending into the chassis body 1, the sliding seat 6 can only slide along the sliding rail 62 in the extending process through the arrangement of the sliding rail 62, the extending track of the screw rod 2 is further limited, and the screw rod 2 is prevented from deviating.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, a schematic representation of the term does not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims (9)

1. A chassis for a circuit breaker comprises a chassis body, threaded holes formed in the middles of two opposite side walls of the chassis body, and a screw rod capable of penetrating through the two threaded holes;

the screw rod is in threaded connection with the two threaded holes, and is characterized in that,

the extending end of the screw rod is provided with an axially extending open slot, an

A driving component is inserted in the open slot, wherein

When the driving component is contracted in the open slot, the driving component can block the open slot;

when the driving assembly is unfolded from the open slot, the driving assembly forms a handle which is suitable for driving the screw rod to rotate.

2. The circuit breaker chassis of claim 1,

the driving assembly comprises a protruding part arranged along the open slot in a sliding manner, and a hand-cranking part hinged to the protruding end of the protruding part;

the inner wall of the open slot is provided with a limit slot;

the extending part comprises a limiting block matched with the limiting groove; wherein

When the hand-cranking part is contracted, the hand-cranking part can be retracted into the limiting groove;

when the hand-cranking portion is unfolded, the hand-cranking portion can drive the screw rod to rotate through the limiting block.

3. The chassis for circuit breakers of claim 2, wherein,

the extension part comprises an extension rod extending along the axial direction of the open slot;

the limiting block is fixed on the outer side wall of the extension rod and is positioned at one end, in the open slot, of the extension rod;

a baffle is fixed on the inner wall of the middle part of the open slot; wherein

The baffle can block the limiting block from sliding out of the limiting groove.

4. The chassis for circuit breakers of claim 3, wherein,

the hand cranking portion includes: the two hinged seats are fixed on the outer wall of the extending end of the extending rod in parallel, and the handheld rod is rotatably connected between the two hinged seats;

the inner side walls of the two hinged seats and the side wall of the limiting groove are in the same plane;

when the handheld rod is attached to the extension rod, the handheld rod can retract into the limiting groove until the handheld rod is blocked by the hinge seat;

the hand-held pole forms the handle when the hand-held pole is deployed.

5. The circuit breaker chassis of claim 4,

two sides of the handheld rod are provided with buckling grooves corresponding to the five fingers respectively; wherein

The hand-held rod is driven to rotate by taking the extension rod as a center through the fact that the fingers are fastened in the corresponding fastening grooves.

6. The chassis for circuit breakers of claim 5, wherein,

a stop block is arranged on the inner side of any hinged seat; wherein

When the handheld rod is unfolded, the stop block can block the handheld rod from being unfolded until the angle between the handheld rod and the extension rod exceeds 90 degrees.

7. The chassis for circuit breakers of claim 6, wherein,

a travel switch is fixedly connected in the chassis body; and

two sides of the travel switch are respectively provided with a connecting rod assembly extending to the lower part of the screw rod; wherein

The lead screw can trigger the probe corresponding to the travel switch through the corresponding connecting rod assembly.

8. The chassis for circuit breakers of claim 7, wherein,

a trigger block is arranged at one end of the screw rod far away from the extending end,

the connecting rod assembly comprises a trigger seat positioned below the screw rod and a linkage rod group of a probe, wherein two ends of the linkage rod group are respectively connected with the trigger seat and the travel switch; and

a concave part matched with the trigger block is downwards sunken in the middle of the trigger seat; wherein

When the screw rod is rotated, the trigger block can be linked with the connecting rod assembly to trigger the corresponding probe of the travel switch.

9. The chassis for circuit breakers of claim 8, wherein,

the extending end of the lead screw, which is positioned on the chassis body, is provided with a sliding seat; and

a guide sleeve rotatably connected with the screw rod is arranged in the middle of the sliding seat;

the sliding seat is fixedly connected with a sliding rail extending to the inner part of the chassis body; wherein

When the screw rod is rotated, the sliding seat can slide through the sliding rail.

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