Handle limiting device

Abstract

The invention relates to the technical field of circuit breakers and discloses a handle limiting device. The handle limiting device comprises a mounting shell and a limiting assembly. The mounting shell is arranged on the chassis, the end part of a driving lead screw on the chassis extends into the mounting shell, the end part of the handle extends into the mounting shell, and the handle is connected with the driving lead screw; the limiting assembly is arranged in the mounting shell and comprises a square block, an arc-shaped clamping rod and an annular clamping groove, the square block is arranged at the end of the driving lead screw, an embedding groove is formed in the end of the handle, the square block is inserted into the embedding groove so as to limit circumferential rotation between the handle and the driving lead screw, the clamping groove is formed in the handle, and the clamping rod is inserted into the clamping groove. The clamping groove and the driving lead screw are coaxially arranged, the clamping rod is rotationally arranged in the mounting shell and can be clamped into the clamping groove, axial movement of the handle and the driving lead screw is reliably limited through matching of the arc-shaped clamping rod and the annular clamping groove, and opening and closing of the limiting device do not need to be manually operated additionally.

Description

Technical Field

[0001] This invention belongs to the field of circuit breaker technology, specifically relating to a handle limiting device. Background Technology

[0002] As a key piece of equipment in the power system, the reliable operation and convenient handling of handcart-type circuit breakers directly affect the stability and maintenance efficiency of the power network. The movement of these circuit breakers typically relies on a mechanical rocking mechanism mounted on a chassis. The core of this mechanism includes an operating handle, a transmission shaft that engages with the handle's tenon, and a lead screw. By inserting the handle into the operating hole on the chassis panel and rotating the handle, the operator can drive the chassis in a linear motion, precisely pushing the circuit breaker to the working position or pulling it back to the test position, thus completing the closing, opening, or maintenance operations of the power system.

[0003] The existing chassis vehicle is equipped with a handle limit device to ensure stability, but the device must be manually opened and closed every time, which wastes time, reduces efficiency, and brings additional operational burden to the staff in frequent debugging or maintenance scenarios. Summary of the Invention

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention provide a handle limiting device that can automatically lock and unlock the handle, reducing the operational burden on workers.

[0005] The handle limiting device of this invention includes:

[0006] Mounting housing, the mounting housing is disposed on the chassis vehicle, the end of the drive screw on the chassis vehicle extends into the mounting housing, the end of the handle extends into the mounting housing, and the handle is connected to the drive screw; A limiting component is disposed in the mounting housing. The limiting component includes a square block, an arc-shaped locking rod, and an annular locking groove. The square block is disposed at the end of the drive screw, and the end of the handle has an insertion groove. The square block is inserted into the insertion groove to restrict the circumferential rotation between the handle and the drive screw. The locking groove is disposed on the handle and is coaxially arranged with the drive screw. The locking rod is rotatably disposed in the mounting housing and can be engaged in the locking groove to restrict the axial movement between the handle and the drive screw.

[0007] The handle limiting device of this invention precisely restricts the circumferential rotation of the handle and the drive screw through the cooperation of a square block and an embedded groove, ensuring transmission stability and preventing relative slippage during operation. The matching of an arc-shaped locking rod and an annular locking groove reliably restricts the axial movement of the handle and the drive screw, preventing accidental disengagement of the handle and improving operational safety. The integrated design of the mounting housing neatly installs all limiting components, optimizing the structural layout, reducing interference from the external environment to internal components, and extending the device's service life. Through the linkage design of the overall structure, there is no need for additional manual operation of the limiting device, simplifying the operation process, saving time and costs, and reducing the operational burden on staff in frequent debugging or maintenance scenarios.

[0008] In some embodiments, the limiting component further includes a winding member and a transmission member. The locking rod is connected to the winding member via the transmission member, and the winding member is connected to the drive screw to drive the locking rod to rotate around itself and thus engage with the locking slot.

[0009] In some embodiments, the winding member includes a sliding shell slidably connected to the inner wall of the mounting housing, a first extension plate fixed to the inner wall of the mounting housing, a first guide rod fixed to the first extension plate, a second extension plate fixed to the back of the sliding shell, the second extension plate being elastically connected to a stop block at the end of the first guide rod via a first spring, a first winding wheel being rotatably connected to the front of the sliding shell, the first winding wheel being elastically connected to the sliding shell via a coil spring, a winding rope being wound around the outside of the first winding wheel, and the other end of the winding rope being wound around the outside of the second winding wheel sleeved on the drive screw.

[0010] In some embodiments, the second winding wheel is sleeved on the end of the drive screw, and the square block is disposed on the second winding wheel; the second extension plate has a through hole adapted to the first guide rod, and the first guide rod slides through the through hole.

[0011] In some embodiments, the transmission component includes a push rod disposed on the sliding shell, a vertical rod disposed on the bottom wall of the mounting shell, and a rotating shaft rotatably disposed on the vertical rod. The two ends of the rotating shaft are respectively connected to a rotating rod and a locking rod. The push rod is in contact with the rotating rod, and the locking rod is elastically connected to the vertical rod through a second spring.

[0012] In some embodiments, the handle limiting device further includes a prompting component, which includes a stand disposed on the inner wall of the mounting housing, a bell fixed to the inner wall of the stand, and a pusher disposed within the stand. The pusher is connected to the sliding housing and is used to strike the bell when the lever disengages from the slot.

[0013] In some embodiments, the pushing member includes a mounting plate fixed to the sliding shell, a second guide rod fixed inside the mounting plate, and a slider slidably connected to the second guide rod, with a roller rotatably connected to the slider; a third guide rod is fixed inside the upright frame, and a lifting plate is slidably connected to the third guide rod; the lifting plate is elastically connected to the upright frame via a third spring; a first striking block corresponding to the bell is fixed at the bottom of the lifting plate; a triangular block is provided on the lifting plate, and the triangular block is used to cooperate with the roller to drive the lifting plate to move up and down.

[0014] In some embodiments, the mounting plate has a through groove adapted to the slider, and the slider is slidably connected in the through groove.

[0015] In some embodiments, the handle limiting device further includes a striking component, which includes a vertical plate disposed on the inner wall of the mounting housing and a translation member disposed within the vertical plate. The translation member is connected to the mounting plate and is used to strike the handle when the locking rod disengages from the locking slot.

[0016] In some embodiments, the translation member includes a third extension plate fixed to the mounting plate, an L-shaped rod fixed to the third extension plate, a slide rod slidably connected inside the upright plate, a second striking block provided at one end of the slide rod near the handle, a fourth spring connected between the second striking block and the upright plate, a metal block fixed at one end of the slide rod away from the handle, a magnetic block adapted to the metal block provided at the end of the L-shaped rod, and a stop bar for blocking the metal block fixed on the left side of the upright plate. Attached Figure Description

[0017] Figure 1 This is an overall schematic diagram of the present invention.

[0018] Figure 2 This is a schematic diagram of the limiting component in this invention. Figure 1 .

[0019] Figure 3 This is a schematic diagram of the limiting component in this invention. Figure 2 .

[0020] Figure 4 This is a schematic diagram of the winding component in this invention.

[0021] Figure 5 This is a schematic diagram of the transmission component in this invention. Figure 1 .

[0022] Figure 6 This is a schematic diagram of the transmission component in this invention. Figure 2 .

[0023] Figure 7This is a schematic diagram of the prompting component in this invention. Figure 1 .

[0024] Figure 8 This is a schematic diagram of the prompting component in this invention. Figure 2 .

[0025] Figure 9 This is a schematic diagram of the striking component in this invention. Figure 1 .

[0026] Figure 10 This is a schematic diagram of the striking component in this invention. Figure 2 .

[0027] Figure label: 1. Install the casing; 2. Chassis vehicle; 3. Drive screw; 4. Handle; 5. Limiting component; 51. Square block; 52. Locking rod; 53. Locking slot; 54. Rewinding component; 541. Sliding shell; 542. First extension plate; 543. First guide rod; 544. Second extension plate; 545. First spring; 546. Stop block; 547. First winding wheel; 548. Coil spring; 549. Winding rope; 55. Transmission component; 551. Push rod; 552. Rotating shaft; 553. Rotating rod; 554. Second spring; 555. Upright post; 56. Second winding wheel; 6. Prompt component; 61. Stand; 62. Bell; 63. Pushing component; 631. Mounting plate; 632. Second guide rod; 633. Slider; 634. Roller; 635. Third guide rod; 636. Lifting plate; 637. Third spring; 638. First striking block; 639. Triangular block; 7. Striking assembly; 71. Vertical plate; 72. Translation component; 721. Third extension plate; 722. L-shaped rod; 723. Slide rod; 724. Second striking block; 725. Fourth spring; 726. Metal block; 727. Magnetic block; 728. Stop bar. Detailed Implementation

[0028] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0029] like Figures 1-10As shown, the handle limiting device of this embodiment includes a mounting shell 1 and a limiting component 5. The mounting shell 1 is mounted on a chassis 2. The end of the drive screw 3 on the chassis 2 extends into the mounting shell 1, and the end of the handle 4 extends into the mounting shell 1. The handle 4 is connected to the drive screw 3. The limiting component 5 is mounted in the mounting shell 1 and includes a square block 51, an arc-shaped locking rod 52, and an annular locking groove 53. The square block 51 is located at the end of the drive screw 3, and the end of the handle 4 has an insertion groove. The square block 51 is inserted into the insertion groove to limit the circumferential rotation between the handle 4 and the drive screw 3. The locking groove 53 is located on the handle 4 and is coaxially arranged with the drive screw 3. The locking rod 52 is rotatably mounted in the mounting shell 1 and can be engaged in the locking groove 53 to limit the axial movement between the handle 4 and the drive screw 3.

[0030] The handle limiting device of this invention precisely restricts the circumferential rotation of the handle and the drive screw through the cooperation of a square block and an embedded groove, ensuring transmission stability and preventing relative slippage during operation. The matching of an arc-shaped locking rod and an annular locking groove reliably restricts the axial movement of the handle and the drive screw, preventing accidental disengagement of the handle and improving operational safety. The integrated design of the mounting housing neatly installs all limiting components, optimizing the structural layout, reducing interference from the external environment to internal components, and extending the device's service life. Through the linkage design of the overall structure, there is no need for additional manual operation of the limiting device, simplifying the operation process, saving time and costs, and reducing the operational burden on staff in frequent debugging or maintenance scenarios.

[0031] Specifically, the mounting shell 1 provides the mounting base for the overall structure. The end of the drive screw 3 extends into the mounting shell 1 and is connected to the handle 4. A square block 51 is set at the end of the drive screw 3 and inserted into the groove at the end of the handle 4 to restrict the circumferential rotation between the handle 4 and the drive screw 3, ensuring that the two rotate synchronously. An annular groove 53 is opened on the handle 4 and is coaxial with the drive screw 3. An arc-shaped locking rod 52 is rotatably set in the mounting shell 1. When the locking rod 52 is engaged in the groove 53, it restricts the axial movement between the handle 4 and the drive screw 3, thereby achieving the limiting and fixing of the handle 4.

[0032] In some embodiments, the limiting component 5 further includes a winding member 54 and a transmission member 55. The locking rod 52 is connected to the winding member 54 through the transmission member 55. The winding member 54 is connected to the drive screw 3 to drive the locking rod 52 to rotate around itself and thus engage in the locking slot 53.

[0033] The handle limiting device of this invention achieves automatic rotation of the lever through the linkage between the winding component and the transmission component, eliminating the need for manual opening and closing of the limiting device and improving operational efficiency. By directly connecting the winding component to the drive screw, the movement of the drive screw synchronously drives the limiting action, ensuring precise matching of the limiting and unlocking timings and guaranteeing operational continuity. The integrated design of the limiting components combines power transmission and limiting execution, resulting in a compact structure, reduced space occupation, and suitability for chassis vehicle installation environments.

[0034] Specifically, the winding component 54 is connected to the drive screw 3 and moves synchronously with it. When the winding component 54 is in operation, it transmits power through the transmission component 55 to drive the locking rod 52 to rotate around itself. When it is necessary to limit the movement, the locking rod 52 rotates into the locking slot 53 to lock in. When it is necessary to unlock the movement, the locking rod 52 rotates in the opposite direction to disengage from the locking slot 53. The limit and unlocking switching of the handle 4 can be completed without manual operation.

[0035] In some embodiments, the winding member 54 includes a sliding shell 541 slidably connected to the inner wall of the mounting shell 1, a first extension plate 542 fixed to the inner wall of the mounting shell 1, and a first guide rod 543 fixed to the first extension plate 542. A second extension plate 544 is fixed to the back of the sliding shell 541. The second extension plate 544 is elastically connected to the stop block 546 at the end of the first guide rod 543 by a first spring 545. A first winding wheel 547 is rotatably connected to the front of the sliding shell 541. The first winding wheel 547 is elastically connected to the sliding shell 541 by a coil spring 548. A winding rope 549 is wound around the outside of the first winding wheel 547. The other end of the winding rope 549 is wound around the outside of the second winding wheel 56 sleeved on the drive screw 3.

[0036] The handle limiting device of this invention ensures smooth movement of the sliding housing and avoids jamming through the sliding engagement of the first guide rod and the sliding housing, guaranteeing the accuracy of power transmission. The elastic action of the first spring and the coil spring enables automatic reset of the sliding housing and the first winding wheel, eliminating the need for an additional drive structure, simplifying the design and improving device reliability. The winding engagement of the coiled rope and the winding wheel converts the rotational motion of the drive screw into the linear motion of the sliding housing, resulting in efficient power transmission and ensuring timely response to limiting and unlocking actions.

[0037] Specifically, in the winding component 54, the sliding shell 541 is slidably connected to the inner wall of the mounting shell 1, the first extension plate 542 is fixed to the inner wall of the mounting shell 1, the first guide rod 543 is fixed to the first extension plate 542, and the second extension plate 544 is fixed to the back of the sliding shell 541 and elastically connected to the stop block 546 at the end of the first guide rod 543 through the first spring 545; the first winding wheel 547 is rotatably connected to the front of the sliding shell 541 and elastically connected to the sliding shell 541 through the coil spring 548, and the winding rope 549 is wound around the first winding wheel 547 and the second winding wheel 56 sleeved on the drive screw 3; when the drive screw 3 rotates, it drives the second winding wheel 56 to rotate synchronously, winding or releasing the winding rope 549, thereby pulling the sliding shell 541 to slide along the first guide rod 543, and driving the locking rod 52 to rotate through the transmission component 55.

[0038] In some embodiments, the second winding wheel 56 is sleeved on the end of the drive screw 3, and the square block 51 is disposed on the second winding wheel 56; the second extension plate 544 has a through hole adapted to the first guide rod 543, and the first guide rod 543 slides through the through hole.

[0039] The handle limiting device of this invention shortens the power transmission path and improves transmission efficiency by engaging the second winding wheel with the end of the drive screw, while also facilitating precise docking between the square block and the handle. The sliding fit between the through hole and the first guide rod restricts the movement trajectory of the sliding shell, preventing deflection or jamming during movement and ensuring the stability of the winding action. The integrated design of the square block and the second winding wheel simplifies component connections, reduces assembly errors, and improves the overall assembly accuracy and operational reliability.

[0040] Specifically, the second winding wheel 56 is sleeved on the end of the drive screw 3, and the square block 51 is set on the second winding wheel 56. When the drive screw 3 rotates, it drives the second winding wheel 56 to rotate synchronously, and then drives the handle 4 to rotate synchronously through the square block 51. The through hole on the second extension plate 544 is adapted to the first guide rod 543. The first guide rod 543 slides through the through hole to provide precise guidance for the sliding of the sliding shell 541, ensuring that the sliding shell 541 moves smoothly along the axial direction of the first guide rod 543.

[0041] In some embodiments, the transmission component 55 includes a push rod 551 disposed on the sliding shell 541, a vertical rod 555 disposed on the bottom wall of the mounting shell 1, and a rotating shaft 552 rotatably disposed on the vertical rod 555. The two ends of the rotating shaft 552 are respectively connected to a rotating rod 553 and a locking rod 52. The push rod 551 is in contact with the rotating rod 553, and the locking rod 52 is elastically connected to the vertical rod 555 through a second spring 554.

[0042] The handle limiting device of this invention efficiently converts the linear motion of the sliding shell into the rotational motion of the locking lever through lever transmission of the push rod, rotating rod, and rotating shaft. The power transmission is direct and has low loss, ensuring sensitive limiting action. The elastic reset effect of the second spring enables automatic return of the locking lever, eliminating the need for an additional drive structure, simplifying the design and improving the device's automatic response capability. The stable support of the rotating shaft by the upright rod ensures smooth rotational motion, preventing deviation during locking lever rotation and improving the accuracy of limiting and unlocking.

[0043] Specifically, in the transmission component 55, the push rod 551 is mounted on the sliding shell 541 and slides synchronously with the sliding shell 541; the upright rod 555 is fixed to the bottom wall of the mounting shell 1, the rotating shaft 552 is rotatably connected to the upright rod 555, the rotating rod 553 and the locking rod 52 are respectively fixed at both ends of the rotating shaft 552, and the locking rod 52 is elastically connected to the upright rod 555 through the second spring 554; when the sliding shell 541 slides, it drives the push rod 551 to push the rotating rod 553, so that the rotating shaft 552 rotates around the upright rod 555, thereby driving the locking rod 52 to rotate synchronously, so as to realize the engagement or disengagement of the locking rod 52 with the locking groove 53.

[0044] In some embodiments, the handle limiting device further includes a prompting component 6, which includes a stand 61 disposed on the inner wall of the mounting housing 1, a bell 62 fixed on the inner wall of the stand 61, and a pusher 63 disposed in the stand 61. The pusher 63 is connected to the sliding housing 541 and is used to strike the bell 62 when the lever 52 is disengaged from the slot 53.

[0045] The handle limiting device of this invention, through the linkage between the pushing component and the sliding shell, achieves simultaneous triggering of sound prompts and unlocking actions, providing clear feedback without additional operation and facilitating operator judgment of the handle status. The bell-shaped sound design provides clear auditory prompts, particularly suitable for operation scenarios with obstructed vision, improving operational convenience and safety. The integrated design of the prompt components allows for collaborative operation with existing limiting structures without occupying additional operating space, exhibiting strong structural compatibility and requiring no alteration to the original main layout.

[0046] Specifically, in the prompting component 6, the stand 61 is fixed to the inner wall of the mounting shell 1, the bell 62 is fixed to the inner wall of the stand 61, and the pusher 63 is connected to the sliding shell 541 and moves synchronously with it; when the locking rod 52 needs to disengage from the locking slot 53, the sliding shell 541 drives the pusher 63 to move, and the pusher 63 drives the striking structure to strike the bell 62 through mechanical transmission, thus emitting a sound prompt.

[0047] In some embodiments, the pushing member 63 includes a mounting plate 631 fixed on the sliding shell 541, a second guide rod 632 fixed inside the mounting plate 631, and a slider 633 slidably connected to the second guide rod 632. A roller 634 is rotatably connected to the slider 633. A third guide rod 635 is fixed inside the upright frame 61. A lifting plate 636 is slidably connected to the third guide rod 635. The lifting plate 636 is elastically connected to the upright frame 61 through a third spring 637. A first striking block 638 corresponding to the bell 62 is fixed at the bottom of the lifting plate 636. A triangular block 639 is provided on the lifting plate 636. The triangular block 639 is used to cooperate with the roller 634 to drive the lifting plate 636 to move up and down.

[0048] The handle limiting device in this embodiment of the invention converts horizontal movement into a vertical striking action through the engagement of a roller and the inclined surface of a triangular block. The transmission structure is simple and efficient, ensuring accurate triggering of the audible alert. Multiple guide rods provide limiting guidance, ensuring stable movement trajectories for each component, preventing jamming, and improving the operational reliability of the alerting assembly. The energy storage and reset function of the third spring enables rapid impact of the striking block, resulting in clear bell sound, enhanced alert effect, and convenient status identification for the operator.

[0049] Specifically, in the sliding component 63, the mounting plate 631 is fixed on the sliding shell 541, the second guide rod 632 is fixed inside the mounting plate 631, the slider 633 is slidably connected to the second guide rod 632, and the roller 634 is rotatably connected to the slider 633; ​​the third guide rod 635 is fixed inside the upright frame 61, the lifting plate 636 is slidably connected to the third guide rod 635 and elastically connected to the upright frame 61 through the third spring 637, the first striking block 638 is fixed to the bottom of the lifting plate 636, and the triangular block 639 is set on the lifting plate 636; when the sliding shell 541 moves the mounting plate 631, the roller 634 and the triangular block 639 cooperate to squeeze, driving the lifting plate 636 to move upward along the third guide rod 635 and compressing the third spring 637; when the roller 634 disengages from the triangular block 639, the third spring 637 resets and drives the lifting plate 636 to move downward, and the first striking block 638 strikes the bell 62 to produce a sound.

[0050] In some embodiments, the mounting plate 631 has a through groove adapted to the slider 633, and the slider 633 is slidably connected in the through groove.

[0051] The handle limiting device of this invention provides adaptive adjustment space for the slider through the sliding fit between the through groove and the slider, eliminating the risk of interference during movement and ensuring smooth operation of the pushing component. Through structural adaptation design, no additional guide components are needed, simplifying the structure while improving movement flexibility, reducing component wear, and extending the device's service life. The limiting effect of the through groove prevents the slider from detaching from the mounting plate, ensuring stable power transmission and reliable triggering of the indicator component.

[0052] Specifically, the mounting plate 631 has a through groove adapted to the slider 633, and the slider 633 is slidably connected in the through groove; when the roller 634 and the triangular block 639 move together, the slider 633 can adaptively adjust its position along the through groove to avoid motion interference, ensure that the roller 634 rolls smoothly and drives the lifting plate 636 to move.

[0053] In some embodiments, the handle limiting device further includes a striking component 7, which includes a vertical plate 71 disposed on the inner wall of the mounting housing 1 and a translation member 72 disposed in the vertical plate 71. The translation member 72 is connected to the mounting plate 631 and is used to strike the handle 4 when the locking lever 52 is disengaged from the locking slot 53.

[0054] The handle limiting device of this invention, through the linkage between the translation component and the mounting plate, achieves simultaneous triggering of tactile cues, unlocking actions, and auditory cues, forming dual cues and improving the accuracy of status recognition. The tactile design with vibration feedback is suitable for noisy environments or scenarios with limited hearing, compensating for the shortcomings of single auditory cues and enhancing operational safety. The independent integration of the tapping component allows it to work collaboratively with existing structures without affecting the limiting and auditory cues functions, offering strong structural scalability and adaptability to diverse operational needs.

[0055] Specifically, in the striking assembly 7, the upright plate 71 is fixed to the inner wall of the mounting shell 1, and the translation component 72 is connected to the mounting plate 631 and moves synchronously with it; when the locking rod 52 disengages from the locking slot 53, the mounting plate 631 drives the translation component 72 to move, and the translation component 72 drives the second striking block 724 to move quickly through mechanical transmission, impacting the handle 4 to generate vibration feedback.

[0056] In some embodiments, the translation member 72 includes a third extension plate 721 fixed on the mounting plate 631, an L-shaped rod 722 fixed on the third extension plate 721, a slide rod 723 slidably connected inside the upright plate 71, a second striking block 724 provided at one end of the slide rod 723 near the handle 4, a fourth spring 725 connected between the second striking block 724 and the upright plate 71, a metal block 726 fixed at one end of the slide rod 723 away from the handle 4, a magnetic block 727 adapted to the metal block 726 provided at the end of the L-shaped rod 722, and a stop bar 728 for blocking the metal block 726 fixed on the left side of the upright plate 71.

[0057] The handle limiting device in this embodiment of the invention achieves rapid power transmission and release through the magnetic attraction between the magnetic block and the metal block, driving the second striking block to generate a strong impact with clear vibration feedback. The energy storage function of the fourth spring ensures sufficient impact force, allowing the operator to clearly perceive the impact even under complex working conditions, thus improving the reliability of the prompt. The limit unlocking design of the stop lever precisely controls the impact timing, ensuring complete synchronization between vibration feedback and the handle's unlocked state, avoiding false prompts and improving operational accuracy.

[0058] Specifically, in the translation component 72, the third extension plate 721 is fixed on the mounting plate 631, the L-shaped rod 722 is fixed on the third extension plate 721, the slide rod 723 is slidably connected inside the upright plate 71, the second striking block 724 is located at the end of the slide rod 723 near the handle 4, the fourth spring 725 is connected between the second striking block 724 and the upright plate 71, the metal block 726 is fixed at the end of the slide rod 723 away from the handle 4, the magnetic block 727 is located at the end of the L-shaped rod 722, and the stop bar 728 is fixed on the left side of the upright plate 71. When the mounting plate 631 moves the L-shaped rod 722, the magnetic block 727 attracts the metal block 726 and pulls the slide rod 723 to move, compressing the fourth spring 725. When the metal block 726 is blocked by the stop bar 728, the magnetic block 727 disengages from the metal block 726, the fourth spring 725 resets and drives the slide rod 723 to move quickly, and the second striking block 724 strikes the handle 4.

[0059] Furthermore, the chassis 2 is equipped with a locking plate, which is used to lock the drive screw 3.

[0060] Furthermore, the elasticity of the coil spring 548 can drive the first winding wheel 547 to rotate automatically, thereby tightening the winding rope 549 and eliminating any slack in the winding rope 549.

[0061] Furthermore, the elastic force of the first spring 545 provides the sliding housing 541 with a tendency to return to its original position toward the second winding wheel 56. After the sliding housing 541 is pulled and slid by the winding rope 549, it can automatically return to its original position through the elastic force of the first spring 545.

[0062] Furthermore, the elastic force of the second spring 554 provides the locking rod 52 with a rotational tendency toward the locking slot 53. After the locking rod 52 is driven away from the locking slot 53 by the transmission component 55, it can automatically rotate and lock into the locking slot 53 by the elastic force of the second spring 554.

[0063] Furthermore, it also includes an interlocking plate, which is mounted on the chassis 2 and adapted to the drive screw 3. The interlocking plate can engage with the drive screw 3 when the circuit breaker reaches the working position or the test position to restrict the circumferential rotation of the drive screw 3.

[0064] Furthermore, when the interlocking plate engages and locks with the drive screw 3, the drive screw 3 drives the second winding wheel 56 to complete the winding action of the rope 549, so that the sliding shell 541 drives the transmission component 55 to drive the locking rod 52 to remain engaged in the slot 53.

[0065] Furthermore, when the interlocking plate disengages from the drive screw 3 and is released from its locking position, the winding rope 549 can be released as the drive screw 3 rotates, causing the sliding shell 541 to slide along the first guide rod 543 and drive the locking rod 52 to disengage from the slot 53 via the transmission component 55.

[0066] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0067] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0068] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0069] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0070] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0071] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A handle limiting device, characterized in that, include: Mounting housing (1), the mounting housing (1) is mounted on chassis vehicle (2), the end of the drive screw (3) on chassis vehicle (2) extends into the mounting housing (1), the end of the handle (4) extends into the mounting housing (1), and the handle (4) is connected to the drive screw (3). A limiting component (5) is disposed in the mounting housing (1). The limiting component (5) includes a square block (51), an arc-shaped locking rod (52), and an annular locking groove (53). The square block (51) is disposed at the end of the drive screw (3). An embedding groove is provided at the end of the handle (4). The square block (51) is inserted into the embedding groove to restrict the circumferential rotation between the handle (4) and the drive screw (3). The locking groove (53) is provided on the handle (4). The locking groove (53) is coaxially disposed with the drive screw (3). The locking rod (52) is rotatably disposed in the mounting housing (1). The locking rod (52) can be locked into the locking groove (53) to restrict the axial movement between the handle (4) and the drive screw (3).

2. The handle limiting device according to claim 1, characterized in that, The limiting component (5) also includes a winding component (54) and a transmission component (55). The locking rod (52) is connected to the winding component (54) through the transmission component (55). The winding component (54) is connected to the drive screw (3) to drive the locking rod (52) to rotate around itself and thus engage in the locking slot (53).

3. The handle limiting device according to claim 2, characterized in that, The winding component (54) includes a sliding shell (541) slidably connected to the inner wall of the mounting shell (1), a first extension plate (542) fixed to the inner wall of the mounting shell (1), and a first guide rod (543) fixed to the first extension plate (542). A second extension plate (544) is fixed to the back of the sliding shell (541). The second extension plate (544) is elastically connected to the stop block (546) at the end of the first guide rod (543) through a first spring (545). A first winding wheel (547) is rotatably connected to the front of the sliding shell (541). The first winding wheel (547) is elastically connected to the sliding shell (541) through a coil spring (548). A winding rope (549) is wound around the outside of the first winding wheel (547). The other end of the winding rope (549) is wound around the outside of the second winding wheel (56) sleeved on the drive screw (3).

4. The handle limiting device according to claim 3, characterized in that, The second winding wheel (56) is sleeved on the end of the drive screw (3), and the square block (51) is disposed on the second winding wheel (56); the second extension plate (544) has a through hole adapted to the first guide rod (543), and the first guide rod (543) slides through the through hole.

5. The handle limiting device according to claim 4, characterized in that, The transmission component (55) includes a push rod (551) disposed on the sliding shell (541), a vertical rod (555) disposed on the bottom wall of the mounting shell (1), and a rotating shaft (552) rotatably disposed on the vertical rod (555). The two ends of the rotating shaft (552) are respectively connected to a rotating rod (553) and a locking rod (52). The push rod (551) is in contact with the rotating rod (553), and the locking rod (52) is elastically connected to the vertical rod (555) through a second spring (554).

6. The handle limiting device according to claim 5, characterized in that, It also includes a prompting component (6), which includes a stand (61) disposed on the inner wall of the mounting housing (1), a bell (62) fixed on the inner wall of the stand (61), and a pusher (63) disposed in the stand (61). The pusher (63) is connected to the sliding housing (541) and is used to strike the bell (62) when the lever (52) is disengaged from the slot (53).

7. The handle limiting device according to claim 6, characterized in that, The pushing component (63) includes a mounting plate (631) fixed on the sliding shell (541), a second guide rod (632) fixed inside the mounting plate (631), and a slider (633) slidably connected to the second guide rod (632). A roller (634) is rotatably connected to the slider (633). A third guide rod (635) is fixed inside the stand (61). A lifting plate (636) is slidably connected to the third guide rod (635). The lifting plate (636) is elastically connected to the stand (61) through a third spring (637). A first striking block (638) corresponding to the bell (62) is fixed at the bottom of the lifting plate (636). A triangular block (639) is provided on the lifting plate (636). The triangular block (639) is used to cooperate with the roller (634) to drive the lifting plate (636) to move up and down.

8. The handle limiting device according to claim 7, characterized in that, The mounting plate (631) has a through groove adapted to the slider (633), and the slider (633) is slidably connected in the through groove.

9. The handle limiting device according to claim 7, characterized in that, It also includes a striking component (7), which includes a vertical plate (71) disposed on the inner wall of the mounting housing (1) and a translation component (72) disposed in the vertical plate (71). The translation component (72) is connected to the mounting plate (631) and is used to strike the handle (4) when the lever (52) is disengaged from the slot (53).

10. The handle limiting device according to claim 9, characterized in that, The translation component (72) includes a third extension plate (721) fixed on the mounting plate (631) and an L-shaped rod (722) fixed on the third extension plate (721). A slide rod (723) is slidably connected inside the upright plate (71). A second striking block (724) is provided at one end of the slide rod (723) near the handle (4). A fourth spring (725) is connected between the second striking block (724) and the upright plate (71). A metal block (726) is fixed at one end of the slide rod (723) away from the handle (4). A magnetic block (727) adapted to the metal block (726) is provided at the end of the L-shaped rod (722). A stop bar (728) for blocking the metal block (726) is fixed on the left side of the upright plate (71).

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