CN213753458U - Ground vehicle - Google Patents

Abstract

The embodiment of the disclosure discloses a grounding vehicle. The ground engaging vehicle described herein includes: a frame comprising a top and a bottom; a grounding switch movably coupled to the frame and including a tentacle adapted to electrically connect with a bus bar or cable in the switchgear to ground the bus bar or cable; a lifting mechanism configured to drive the grounding switch to move between the top and the bottom; a first locking part coupled to and moving with the grounding switch; and a second locking part provided at a predetermined position of the frame between the top and the bottom; wherein the second locking portion is adapted to engage with the first locking portion to lock the earthing switch in the first position between the top and the bottom when the earthing switch is moved to the first position corresponding to the predetermined position. The earthing switch described herein is capable of grounding a bus bar or cable to meet the needs of a maintenance or the like, and moreover, a user can easily and accurately park the earthing switch in the first position.

Description

Ground vehicle

Technical Field

The embodiment of the present disclosure relates to the technical field of power transmission and distribution, and more particularly, to a grounding vehicle for grounding a bus or a cable of a switch cabinet.

Background

At present, a switch cabinet (e.g., a high-voltage switch cabinet) is often adopted in an electric power system to perform the functions of switching on and off, controlling and protecting a circuit. For a dual-input single-output switchgear, there is an upper bus bar, a lower bus bar, and a cable located between the upper and lower bus bars in the switchgear. In the case of circuit maintenance, repair, etc., grounding of the upper bus, the lower bus, or the cable is required to ensure safety. Such grounding operation needs to be accomplished with a grounding vehicle. Of course, before the grounding operation is performed, it is necessary to determine that no power is supplied to the upper bus bar, the lower bus bar, or the cable, that is, an electricity testing test operation is performed.

In order to ground the upper bus bar, the lower bus bar or the cable in the switchgear, the grounding switch of the grounding vehicle needs to be lifted to change position. Accordingly, it is desirable to provide a ground engaging vehicle that can more simply achieve the lifting of the ground engaging switch.

SUMMERY OF THE UTILITY MODEL

The traditional grounding vehicle has the defects of complex structure, complex operation process, high cost and the like. Embodiments of the present disclosure provide an improved ground engaging vehicle to address, or at least partially address, the above-referenced and other potential problems.

In a first aspect of the present disclosure, a ground engaging vehicle is provided. This ground connection car includes: a frame comprising a top and a bottom; a grounding switch movably coupled to the frame and including a tentacle adapted to electrically connect with a bus bar or cable in the switchgear to ground the bus bar or cable; a lifting mechanism configured to drive the grounding switch to move between the top and the bottom; a first locking part coupled to and moving with the grounding switch; and a second locking part provided at a predetermined position of the frame between the top and the bottom; wherein the second locking portion is adapted to engage with the first locking portion to lock the earthing switch in the first position between the top and the bottom when the earthing switch is moved to the first position corresponding to the predetermined position.

Embodiments of the present disclosure provide a grounding cart, wherein the lifting mechanism can drive the grounding switch to move between the top and the bottom, thereby, various bus bars or cable configurations of the switch cabinet can be adapted. For example, the upper bus bar, the lower bus bar, and the cable can be grounded, respectively, to meet the needs of work such as maintenance.

The first and second locking portions can lock the earthing switch in a first position between the bottom and the top, which enables the earthing switch to be locked in the first position. This is advantageous for the use of a grounding trolley, for example, where a user may arrange a bus bar or a cable requiring a higher grounding frequency at a location corresponding to the first location. Thereby, the grounding trolley can be easily locked in the first position for a user to ground the corresponding bus bar or cable. This improves the efficiency of the grounding operation.

In addition, the first locking part and the second locking part can accurately and automatically lock the grounding switch at the first position, so that the workload of a user for adjusting and finding the first position can be reduced, the grounding switch can be accurately positioned at a desired position, and the grounding switch is convenient for the user to ground a bus or a cable corresponding to the first position.

In some embodiments, the second locking portion is further adapted to disengage from the first locking portion to allow the earthing switch to move towards the top or the bottom. After being locked in the first position, the first locking part and the second locking part are disengaged, and the grounding switch can continue to move towards the top position or the bottom position so as to ground the bus bar or the cable at other positions.

In some embodiments, the lift mechanism is configured to drive the grounding switch to move to a top position adjacent the top, a bottom position adjacent the bottom, and a first position between the top and the bottom. Thus, the grounding switch can perform grounding operation on the bus bar or the cable in the top position, the bottom position and the first position respectively.

In some embodiments, the first locking portion comprises a groove; the second locking portion includes a latch adapted to engage the recess to lock the grounding switch in the first position between the top and the bottom. Adopt the structure of recess and bolt, simple structure can also guarantee that earthing switch stops accurately on the first position.

In some embodiments, the first locking portion comprises a locking block having a groove disposed thereon; and the second locking portion includes: a seat fixedly connected to the frame and coupled with the latch such that the latch is movable between a locked position and an unlocked position relative to the seat; a resilient member abutting the latch to bias the latch toward the locked position. The latch is caused to default to a locked position by a resilient member abutting the latch. After the bolt is touched by the locking block, the bolt retracts relative to the seat body, and when the locking block moves continuously along with the grounding switch, the groove corresponds to the bolt, the bolt extends out relative to the seat body under the action of the elastic component, so that the joint between the bolt and the groove is completed.

In some embodiments, the second locking portion further comprises: a rotating shaft rotatably mounted to the frame; a cam fixedly coupled to the shaft and configured to drive the shoot bolt from the locked position toward the unlocked position. When it is desired to continue moving the earthing switch from the first position, the cam may be actuated by rotating the shaft to move the deadbolt from the locked position toward the unlocked position. Therefore, the locking structure which is simple in structure, high in reliability and easy to operate is achieved.

In some embodiments, the second locking portion further comprises: a projection fixed to the rotation shaft; a stop assembly, comprising: a guide post fixed to the frame; a limiting plate movably coupled to the guide post; and the spring is sleeved on the guide post, and one end of the spring abuts against the limiting plate, so that the limiting plate abuts against the lug. The limiting plate is abutted against the lug, so that the stability of the position of the rotating shaft can be ensured, and the bolt is ensured to be maintained at a locking position or an unlocking position.

In some embodiments, the locking block further comprises: a first reset pin configured to drive the cam to rotate to return the latch pin from the unlocked position to the locked position when the ground switch moves from the first position toward the bottom; and the second reset pin is configured to drive the cam to rotate when the grounding switch moves from the first position to the top part so as to enable the bolt to return to the locking position from the unlocking position. After the deadbolt disengages from the groove, a reset pin on the lock block may drive the deadbolt from the unlocked position back to the locked position as the ground switch moves. Thus, the deadbolt still automatically locks the earthing switch in the first position during subsequent movement towards the first position.

In some embodiments, the lift mechanism comprises: a nut fixedly connected to the ground switch; a lead screw rotatably mounted to the frame and configured to couple with the nut to drive movement of the grounding switch via the nut. The grounding switch can be driven to move to the top position, the bottom position and the first position by utilizing the screw rod and nut structure, and the lifting mechanism with a simple structure is obtained.

In some embodiments, the lift mechanism further comprises: a driven bevel gear fixedly connected to the lead screw; and the driving bevel gear is meshed with the driven bevel gear. The use of a bevel gear to drive rotation of the lead screw has a cost advantage, while also facilitating the user to rotate the lead screw using the handle.

In some embodiments, the threads of the lead screw are trapezoidal threads. By means of the trapezoidal thread, the grounding switch can be guaranteed to be stably parked at the current position, and the backing-off cannot occur.

In some embodiments, the test bed further comprises a translation mechanism configured to drive the ground engaging vehicle to move between the work position and the test position; wherein, in the working position, the tentacle is electrically connected with the bus or the cable; and in the test position, the tentacles are electrically disconnected from the bus or cable.

In some embodiments, the ground engaging vehicle further comprises: an indicator coupled to the frame and configured to provide a live indication when the bus bar or cable is live. Therefore, the grounding vehicle provided by the embodiment of the disclosure has a grounding function and an electricity testing function. The operation flow is simplified, and the traditional two trolleys of the grounding trolley and the electricity testing trolley are not needed.

In some embodiments, further comprising: a test window connected to the frame configured to provide a test terminal for testing whether the bus bar or cable is live. Therefore, the user can also test the electricity of the bus and the cable in the switch cabinet through the test window.

It should be understood that the summary is not intended to identify key or essential features of the embodiments of the disclosure, nor is it intended to be used to limit the scope of the disclosure. Other features of the present invention will become readily apparent from the following description.

Drawings

The above and other objects, features and advantages of the present disclosure will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout the exemplary embodiments of the present disclosure.

Fig. 1 shows a schematic perspective view of a ground engaging vehicle according to an embodiment of the present disclosure;

FIG. 2 shows a perspective view of another angle of the ground engaging vehicle of FIG. 1;

fig. 3 shows a front view of the grounding cart of fig. 1 with a portion of the frame removed and the grounding switch 20 in a first position 302;

fig. 4 shows a rear view of the grounding cart of fig. 1 with a portion of the frame removed and the grounding switch 20 in a first position 302;

fig. 5 to 8 show perspective views of the first and second locking portions of the ground engaging vehicle of fig. 1;

fig. 9 shows a schematic view of a translation mechanism 50 of a ground engaging vehicle according to an embodiment of the present disclosure; and

fig. 10 illustrates a ground engaging vehicle side view in accordance with an embodiment of the present disclosure.

The same or similar reference numbers will be used throughout the drawings to refer to the same or like elements.

Detailed Description

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

The present disclosure will now be described with reference to several example embodiments. It should be understood that these examples are described only for the purpose of enabling those skilled in the art to better understand and thereby enable the present disclosure, and are not intended to set forth any limitations on the scope of the technical solutions of the present disclosure.

As used herein, the term "include" and its variants are to be read as open-ended terms meaning "including, but not limited to. The term "based on" will be read as "based at least in part on". The terms "one embodiment" and "an embodiment" should be understood as "at least one embodiment". The term "another embodiment" should be understood as "at least one other embodiment". The terms "first," "second," and the like may refer to different or the same object. Other explicit and implicit definitions may be included below. The definitions of the terms are consistent throughout the specification unless the context clearly dictates otherwise.

In general, a grounding vehicle is used to ground the bus bar or the cable in the switch cabinet. For a switchgear cabinet of a dual-input single-output configuration, there is an upper bus bar, a cable and a lower bus bar arranged from top to bottom. In order to ground the upper bus, the cable, or the lower bus, the ground switch mounted on the ground vehicle needs to be raised and lowered.

In general, according to an embodiment of the present disclosure, a ground engaging vehicle includes a frame 10, a ground engaging switch 20, a lifting mechanism 30, a first locking portion 41, and a second locking portion 42.

As shown in fig. 1 to 3, the ground engaging vehicle includes a frame 10, and the frame 10 includes a top portion 101 and a bottom portion 103. In some embodiments, the frame 10 may be a rectangular parallelepiped frame for supporting and/or housing the earthing switch 20 and the lifting mechanism 30. In some embodiments, as shown in fig. 1 and 2, the bottom 103 of the ground engaging cart may be provided with rolling wheels to facilitate the user pushing and pulling the ground engaging cart into and out of the switchgear.

The grounding switch 20 is movably coupled to the frame 10 to move to different heights (e.g., a top position 301, a first position 302, and a bottom position 303) relative to the frame 10. The grounding switch 20 comprises a contact 201, and the contact 201 is used for being electrically connected with a bus bar or a cable in the switch cabinet. A bus bar or cable is a conductor used in a switchgear for transmitting power. After the tentacle 201 is electrically connected with the bus bar or the cable in the switch cabinet, the user may operate the grounding knife switch of the grounding switch 20 to close the grounding path, thereby grounding the bus bar or the cable. In some embodiments, the ground terminal 203 of the grounding cart may be electrically connected with the ground cable of the switchgear when the grounding cart is pushed into the switchgear and in the operating position. Thus, when the grounding knife switch of the grounding switch 20 is closed, the bus bar or the cable may be connected to the conductive bar 2031 of the grounding vehicle, the grounding terminal 203, and the grounding flat cable of the switch cabinet via the tentacle 201.

In some embodiments, the upper bus bar, the cable and the lower bus bar in the switch cabinet are respectively provided with a/B/C three-phase terminals, and correspondingly, the number of the tentacles 201 of the grounding switch 20 is three. For example, when the ground switch 20 is moved to a position corresponding to the upper bus bar, the tentacles 201 may electrically connect the a/B/C three-phase terminals of the upper bus bar to the ground switch 20, respectively, so that the ground switch 20 grounds the upper bus bar. The situation in which the cables and the lower busbar in the switchgear are grounded is similar to the upper busbar.

In order to achieve the elevation of the earthing switch 20 with respect to the frame 10, an elevating mechanism 30 is provided in the frame 10. The elevator mechanism 30 will drive the earthing switch 20 to move between the top 101 and the bottom 103. In some embodiments, as shown in fig. 3, for a switchgear cabinet having an upper bus bar, a cable, and a lower bus bar, the lift mechanism 30 may drive the grounding switch 20 to move to a top position 301 adjacent the top 101, a bottom position 303 adjacent the bottom 103, and a first position 302 between the top 101 and the bottom 103.

In some embodiments, the lifting mechanism 30 may include a nut 31 and a lead screw 32. As shown in fig. 3 and 4, a nut 31 is fixedly connected with the earthing switch 20, and a lead screw 32 is rotatably mounted to the frame 10 and coupled with the nut 31. Thereby, the ground switch 20 is driven to move up and down by the rotation of the screw shaft 32. In some embodiments, the grounding switch 20 may be disposed on a support plate to which the coupling nut 31 is fixed. Thus, the rotation of the screw 32 will cause the support plate to move up and down, thereby effecting up and down movement of the earthing switch 20.

In some embodiments, the lift mechanism 30 further includes a driven bevel gear 33 and a drive bevel gear 34. The driven bevel gear 33 is fixedly connected with the screw rod 32, and the driving bevel gear 34 is engaged with the driven bevel gear 33. In a specific operation process, a user can rotate the driving bevel gear 34 through the handle, so as to drive the driven bevel gear 33 to rotate, the rotation of the driven bevel gear 33 drives the screw rod 32 to rotate, and therefore the lifting of the grounding switch 20 can be realized.

In some embodiments, the threads of the lead screw 32 are trapezoidal threads. With the trapezoidal thread, it can be ensured that the earthing switch 20 is stably parked at the present position without the occurrence of backlash.

It should be understood that the foregoing description of the lift mechanism 30 including the lead screw 32 and the nut 31 is merely exemplary. Instead of manually rotating the lead screw 32, a motor may be used to drive the rotation of the lead screw 32.

As shown in fig. 2, the ground engaging cart may further include an indicator 61 connected to the frame 10. Indicator 61 is used to provide a live indication when the bus bar or cable is live. In some embodiments, indicator 61 may be a high voltage charge indicator. If the indicator 61 indicates that the bus or cable is live, the user needs to first power off the bus or cable before grounding of the bus or cable can be performed.

In some embodiments, the indicator 61 may include an indicator light and a capacitive sensor (e.g., a high voltage capacitive sensor) integrated on a post insulator of the grounding switch 20 that is electrically connected to the tentacle 201 of the grounding switch 20. Therefore, when the bus or the cable in the switch cabinet is electrified, the capacitive sensor outputs a low voltage by means of capacitive voltage division, the low voltage lights the indicator light, and the lighting of the indicator light indicates that the bus or the cable is electrified, and at this time, the closing operation of the grounding knife switch of the grounding switch 20 cannot be performed.

Traditional ground connection operation needs two dollies of earth connection car and test the electric test car, and the earth connection car according to this disclosed embodiment has ground connection function and tests the electric test function simultaneously. The grounding operation process is simplified, and the situation that a user confuses a grounding vehicle and an electricity testing test vehicle in use is avoided.

As shown in fig. 4, the first locking portion 41 of the ground engaging vehicle is coupled with the ground engaging switch 20 and moves with the ground engaging switch 20, for example, the first locking portion 41 may be fixed on the support plate. The second locking portion 42 is provided at a predetermined position of the frame 10 (for example, at a middle position of the frame 10) between the top portion 101 and the bottom portion 103. When the earthing switch 20 is moved to the first position 302 corresponding to the predetermined position, the second locking portion 42 can be engaged with the first locking portion 41, thereby locking the earthing switch 20 at the first position 302 between the top portion 101 and the bottom portion 103.

This is advantageous for use with a ground engaging vehicle. For example, the user may arrange a bus or cable having a higher grounding frequency at a position corresponding to the first position. Thus, a user may easily park the grounding switch 20 in the first position to facilitate the user grounding the corresponding bus bar or cable. Furthermore, the first locking portion 41 and the second locking portion 42 can ensure that the earthing switch 20 is automatically and accurately locked at the first position 302, which can reduce the effort of the user to adjust the position of the earthing switch 20.

In some embodiments, the second locking portion 42 may be disengaged from the first locking portion 41 to allow the earthing switch 20 to move towards the top 101 or the bottom 103. When the user needs to change the position of the earthing switch 20 after the earthing operation of the earthing switch 20 is completed at the first position 302, the user needs to pull the earthing cart from the working position to the trial position so that the tentacle is out of electrical contact with the bus bar or the cable, then disengage the second locking portion 42 from the first locking portion 41, and change the position of the earthing switch 20 (for example, move to the top position 301 or the bottom position 303) using the elevating mechanism 30.

In some embodiments, the first locking portion 41 may include a recess 411 and the second locking portion 42 may include a latch 421. The latch 421 is adapted to engage the recess 411 to lock the ground switch 20 in the first position 302 between the top portion 101 and the bottom portion 103. It should be understood that the positions of the first locking part 41 and the second locking part 42 may be changed, for example, the first locking part 41 may be provided on the frame 10, and the second locking part 42 may be coupled to the ground switch 20.

In some embodiments, as shown in fig. 4-8, the first locking portion 41 may include a locking block 412 and have a groove 411 disposed thereon. The second locking part 42 may include a holder body 420 and an elastic member 422. Body 420 is fixedly connected to frame 10 and coupled with latch 421 such that latch 421 is movable between a locked position and an unlocked position relative to body 420.

As shown in fig. 5 and 6, the second locking portion 42 (e.g., latch 421) is in a locked position. The resilient member 422 has one end abutting the latch 421 and the other end abutting the frame 10, thereby biasing the latch 421 toward the locked position. The elastic member 422 may be a compression spring.

In some embodiments, the second locking portion 42 may further include a rotating shaft 423 and a cam 424. The rotating shaft 423 is rotatably mounted to the frame 10, and the cam 424 is fixedly connected to the rotating shaft 423. Thus, rotation of the shaft 423 rotates the cam 424, which drives the latch 421 from the locked position toward the unlocked position. In this context, a locked position means that latch 421 extends from seat 420; the unlocked position means that latch 421 is retracted relative to housing 420.

In some embodiments, the second locking portion 42 may further include a tab 4231 and a stop assembly. The projection 4231 is fixedly connected with the rotating shaft 423; the stopper assembly includes a guide post 431, a stopper plate 432, and a spring 433.

Referring to fig. 5 to 8, the fixed end of the guide post 431 is fixed to the frame 10, and the stopper plate 432 is movably coupled to the guide post 431 (e.g., the guide post 431 passes through a through-hole provided on the stopper plate 432). The spring 433 is sleeved on the guide post 431, and one end of the spring 433 abuts against the limiting plate 432, so that the limiting plate 432 abuts against the projection 4231. Thus, the stopper plate 432 can slide relative to the guide post 431, and the spring 433 urges the stopper plate 432 toward the free end of the guide post 431 to abut the stopper plate 432 against the boss 4231. To avoid the stopper plate 432 from disengaging from the guide post 431, in some example embodiments, the free end of the guide post 431 may be provided with an annular boss to avoid the stopper plate 432 from disengaging from the guide post 431 (refer to fig. 5 to 7).

In some embodiments, the cam 424 may have a first cam surface 4241, a second cam surface 4242, and a transition surface connecting the two surfaces. In order that the cam 424 may drive the latch 421 to move between the locking position and the unlocking position, the first cam surface 4241 is spaced apart from the central axis X of the rotating shaft 423 by a distance greater than the second cam surface 4242 is spaced apart from the central axis X of the rotating shaft 423. Alternatively, the first and second cam surfaces 4241 and 4242 are respectively provided at different positions in the radial direction of the rotation shaft 423.

In some embodiments, the latch 421 may include a roller 4211. When the latch 421 is in the locked position, the second cam surface 4242 abuts the roller 4211, and the boss 4231 abuts the stopper plate 432. Thereby, it is ensured that the latch 421 is maintained in the locked position.

When it is desired to move the latch 421 to the unlocked position, the user may rotate the shaft 423 (rotation of the shaft 423 will rotate the cam 424) such that the roller 4211 moves along the transition surface of the cam 424; meanwhile, the rotating shaft 423 also drives the boss 4231 to rotate, and the rotation of the boss 4231 pushes the limit plate 432, so that the limit plate 432 compresses the spring 433 and moves along the guide post 431. Finally, the first cam surface 4241 abuts against the roller 4211, and the boss 4231 rotates by a certain angle and then abuts against the stopper plate 432 again, as shown in fig. 7 and 8. Thus, latch 421 is held in the unlocked position.

In some embodiments, the retainer plate 432 may be arched to stably abut against the boss 4231. In some exemplary embodiments, a sliding groove 4201 may be formed on the seat body 420, and the guiding pin on the latch 421 may slide along the sliding groove 4201, so that the seat body 420 may provide a guide for the movement of the latch 421, and the sliding groove 4201 may also play a role in positioning the position of the latch 421, that is, when the guiding pin of the latch 421 moves to two ends of the sliding groove 4201, the latch 421 is in the unlocked position and the locked position, respectively.

In some embodiments, to improve efficiency of use, the latch 421 of the ground engaging vehicle may be automatically reset to the locked position after the first locking portion 41 and the second locking portion 42 are disengaged. Specifically, the locking block 412 may include a first reset pin 413 and a second reset pin 414.

Referring to fig. 6, when the grounding switch 20 moves from the first position 302 toward the top position 301 (when the latch 421 is in the unlocked position) with the first locking portion 41 and the second locking portion 42 disengaged, the second reset pin 414 can drive the cam 424 to rotate to return the latch 421 from the unlocked position to the locked position. For example, the reset plate 4232 may be fixedly coupled to the rotating shaft 423, and the second reset pin 414 may drive the reset plate 4232 to rotate, whereby the rotating shaft 423 and the cam 424 thereon and the boss 4231 will rotate together. At this time, the latch 421 will translate from the unlocking position to the locking position (for example, the guide pin on the latch 421 slides along the sliding groove 4201) relative to the holder body 420 under the driving of the elastic force of the elastic member 422. During this movement, the rollers 4211 may move against the transition surface of the cam 424.

Referring to fig. 8, when the grounding switch 20 is moved from the first position 302 toward the bottom position 303 (when the latch 421 is in the unlocked position) with the first and second locking portions 41 and 42 disengaged, the first reset pin 413 on the locking block 412 rotates the toggle cam 424 with the movement of the grounding switch 20. At this time, the latch 421 will translate from the unlocking position to the locking position (for example, the guide pin on the latch 421 slides along the sliding groove 4201) relative to the holder body 420 under the driving of the elastic force of the elastic member 422. During this movement, the rollers 4211 may move against the transition surface of the cam 424.

During the rotation of the boss 4231, it pushes the stopper plate 432, so that the stopper plate 432 compresses the spring 433 and moves along the guiding column 431. Finally, when the second cam surface 4242 or the first cam surface 4241 abuts against the roller 4211 (corresponding to the latch 421 being in the locked position or in the unlocked position, respectively), the limit plate 432 will abut against the boss 4231 to limit the rotation of the rotating shaft 423.

Referring again to fig. 4, when the ground switch moves from the top position 301 or the bottom position 303 toward the first position 302, the locking block 412 will first push the latch 421, and the latch 421 will compress the elastic member 422 and move toward the unlocked position relative to the seat 420, and with further movement of the ground switch 20, when the groove 411 of the locking block 412 moves to be opposite to the latch 421, the latch 421 moves outward from the unlocked position and is inserted into the groove 411 under the elastic force of the elastic member 422, so as to lock the locking block 412, that is, lock the ground switch 20 at the first position 302.

In some embodiments, the second cam surface 4242 may further comprise a translation surface portion for guiding the movement of the latch 421 when the lock block 412 is translated against the latch 421 to the unlocked position and when the latch 421 is translated to the locked position under the driving of the elastic force of the elastic member 422.

In some embodiments, the ground engaging cart further includes a test window 62 connected to the frame 10. The test window 62 is used to provide a test terminal for testing whether the bus bar or cable is live. Thus, a user can conduct electricity testing on the bus bars and cables in the switch cabinet through the testing window.

In some embodiments, the ground engaging cart further includes a translation mechanism 50. The translation mechanism 50 is used for driving the grounding vehicle to move between the working position and the testing position. In the working position, the tentacle 201 is electrically connected with a bus or a cable; in the test position, the tentacles 201 are electrically disconnected from the bus or cable. When changing the position of the grounding switch 20, the user needs to translate the grounding vehicle from the working position to the testing position, then change the position of the grounding switch 20 through the lifting mechanism 30, and then push the grounding vehicle into the working position.

In some embodiments, as shown in fig. 8, translation mechanism 50 may include a hand lever 51, a worm 52, a worm gear 53, a shaft 54, and a rocker arm 55. One end of the hand lever 51 is fixedly connected with the worm 52, and the worm wheel 53 and the rocker arm 55 are respectively fixedly connected with the shaft 54. The worm 52 meshes with a worm wheel 53.

Thus, the user can rotate the hand lever 51 to rotate the worm 52, and the worm 52 rotates the worm wheel 53, the shaft 54, and the swing arm 55. In this way, by means of the rollers at the end of the rocker arm 55 and the slide grooves in the switchgear cabinet, a translational movement of the ground engaging vehicle between the working position and the test position can be achieved.

The user may use the handle to rock the rotating components of the ground engaging vehicle. For example, with respect to the elevating mechanism 30, a first hole may be provided on the frame 10, and a user may insert a handle into the first hole to rotate the driving bevel gear 34, whereby the ground switch 20 may be elevated by the elevating mechanism 30.

For the translation mechanism, in some exemplary embodiments, the frame 10 may further be provided with a second hole, and the user may insert a handle into the second hole to rotate the hand rocker 51, so that the ground vehicle may be driven to translate between the test position and the working position.

After the earthing switch 20 is locked at the first position 302, in order to release the engagement between the first locking portion 41 and the second locking portion 42, the frame 10 may be further provided with a third hole into which a user may insert an unlocking handle to rotate the rotating shaft 423. Thus, latch 421 may be translated to the unlocked position to allow grounding switch 20 to continue to move.

In some embodiments, the earthing cart may be further provided with an operation hole for operating the earthing knife-switch of the earthing switch 20. Referring to fig. 10, a side view of a ground engaging cart is shown illustrating fourth, fifth and sixth apertures 2041, 2042 and 2043 for operating a ground engaging knife switch, according to an embodiment of the present disclosure. The fourth hole 2041 corresponds to the top position 301 of the grounding switch 20, the fifth hole 2042 corresponds to the first position 302 of the grounding switch 20, and the sixth hole 2043 corresponds to the bottom position 303 of the grounding switch 20. Thus, when the earthing switch 20 is in one of the top position 301, the first position 302 and the bottom position 303, the user can insert the earthing handle into the corresponding hole to operate the closing or opening of the earthing switch.

In some embodiments, the ground engaging cart may also be provided with an interlocking baffle structure. For example, when the user inserts the handle into the first hole for lifting operation, the second hole, the fourth hole 2041, the fifth hole 2042 and the sixth hole 2043 are all blocked by the blocking plate to prevent the user from operating the translation mechanism 50 and the grounding switch by mistake. When the user inserts the handle into the second hole for the translation operation, the first hole, the fourth hole 2041, the fifth hole 2042, and the sixth hole 2043 are all blocked by the blocking plate to prevent the user from misoperation of the lifting mechanism 30 and the grounding switch. In some embodiments, when the user closes the grounding knife switch through the grounding handle, the first hole and the second hole are blocked by the baffle plate, so as to avoid the lifting operation and the translation operation of the user.

It is to be understood that the above detailed embodiments of the present disclosure are merely illustrative of or explaining the principles of the present disclosure and are not limiting of the invention. Therefore, any modification, equivalent replacement, and improvement made within the spirit and principle of the present disclosure should be included in the protection scope of the present invention. Also, it is intended that the appended claims cover all such changes and modifications that fall within the true scope and range of equivalents of the claims.

Claims (14)

1. An earth engaging vehicle, comprising:

a frame (10) comprising a top portion (101) and a bottom portion (103);

a grounding switch (20) movably coupled to the frame (10) and comprising a tentacle (201), the tentacle (201) being adapted to electrically connect with a bus bar or a cable in a switchgear cabinet to ground the bus bar or the cable;

a lifting mechanism (30) configured to drive the grounding switch (20) to move between the top portion (101) and the bottom portion (103);

a first locking portion (41) coupled to the grounding switch (20) and moving with the grounding switch (20); and

a second locking portion (42) provided at a predetermined position of the frame (10) between the top portion (101) and the bottom portion (103);

wherein the second locking portion (42) is adapted to engage with the first locking portion (41) to lock the earthing switch (20) in the first position (302) between the top portion (101) and the bottom portion (103) when the earthing switch (20) is moved to the first position (302) corresponding to the predetermined position.

2. The ground engaging vehicle of claim 1,

the second locking portion (42) is further adapted to disengage from the first locking portion (41) to allow the grounding switch (20) to move towards the top portion (101) or the bottom portion (103).

3. The ground engaging vehicle of claim 1,

the lifting mechanism (30) is configured to drive the grounding switch (20) to move to a top position (301) adjacent the top portion (101), a bottom position (303) adjacent the bottom portion (103), and the first position (302) between the top portion (101) and the bottom portion (103).

4. Ground engaging vehicle according to one of claims 1 to 3,

the first locking portion (41) includes a groove (411);

the second locking portion (42) comprises a latch (421) adapted to engage with the recess (411) to lock the earthing switch (20) in the first position (302) between the top (101) and the bottom (103).

5. Ground engaging vehicle according to claim 4,

the first locking portion (41) includes a locking block (412) on which the groove (411) is provided; and is

The second locking portion (42) includes:

a seat (420) fixedly connected to the frame (10) and coupled with the latch (421) such that the latch (421) is movable between a locked position and an unlocked position relative to the seat (420);

a resilient member (422) abutting the latch (421) to bias the latch (421) towards the locked position.

6. A ground engaging vehicle according to claim 5, characterized in that the second locking portion (42) further comprises:

a rotating shaft (423) rotatably mounted to the frame (10);

a cam (424) fixedly connected to the shaft (423) configured to drive the latch (421) to move from the locked position toward the unlocked position.

7. The ground engaging vehicle of claim 6, wherein said second locking portion (42) further comprises:

a boss (4231) fixed to the rotating shaft (423);

a stop assembly, comprising:

a guide post (431) fixed to the frame (10);

a limit plate (432) movably coupled to the guide post (431);

and the spring (433) is sleeved on the guide post (431) and one end of the spring abuts against the limiting plate (432) so that the limiting plate (432) abuts against the projection (4231).

8. The ground engaging vehicle of claim 7, wherein the locking block (412) further comprises:

a first reset pin (413) configured to drive the cam (424) to rotate to return the latch (421) from the unlocked position to the locked position when the grounding switch (20) moves from the first position (302) toward the bottom (103);

a second reset pin (414) configured to drive the cam (424) to rotate to return the latch (421) from the unlocked position to the locked position when the grounding switch (20) is moved from the first position (302) toward the top portion (101).

9. The ground engaging vehicle according to any of claims 1-3, characterized in that the lifting mechanism (30) comprises:

a nut (31) fixedly connected to the grounding switch (20);

a lead screw (32) rotatably mounted to the frame (10) and configured to couple with the nut (31) to drive the grounding switch (20) to move via the nut (31).

10. The ground engaging vehicle of claim 9, wherein said lift mechanism (30) further comprises:

a driven bevel gear (33) fixedly connected to the lead screw (32);

and a driving bevel gear (34) engaged with the driven bevel gear (33).

11. The ground engaging trolley of claim 9, wherein the thread of the lead screw (32) is a trapezoidal thread.

12. The grounding trolley according to any of claims 1-3, further comprising a translation mechanism (50) configured to drive the grounding trolley to move between a working position and a testing position;

wherein in the working position, the tentacle (201) is electrically connected with the bus bar or the cable; and in the test position, the tentacle (201) is electrically disconnected from the bus or the cable.

13. The ground engaging vehicle of any of claims 1-3, further comprising: an indicator (61) connected to the frame (10) configured to provide a live indication when the bus bar or the cable is live.

14. The ground engaging vehicle of claim 13, further comprising: a test window (62) connected to the frame (10) configured to provide a test terminal for testing whether the bus bar or the cable is live.

Images