An automatic pulling-out temporary grounding device

Abstract

The present invention relates to an automatic pulling-out temporary grounding device, which belongs to the temporary grounding technology and solves the problems of the conventional grounding column in the prior art that the grounding is not firm and difficult to pull out. An automatic pulling-out temporary grounding device includes a reduction motor and a fixed cylinder, which are fixedly connected; the fixed cylinder is a cavity structure, the inner surface of which is welded with a guide block, and the cavity of the fixed cylinder is cooperatively connected with a grounding column, the grounding column is provided with a thread inside, and is threadedly connected to a threaded screw; the end of the grounding column away from the reduction motor is fixedly connected with a conical structure. The present invention realizes the semi-automatic temporary grounding device and saves labor, while increasing the stability and firmness of the grounding of the grounding device.

Description

Technical Field

[0001] The present invention relates to the technical field of temporary grounding, in particular to an automatic pulling-out temporary grounding device. Background Art

[0002] When special vehicles are in operation, electrical components must be reliably grounded to ensure safe electrical use within the vehicle. Traditional grounding stakes are angle iron or pointed cylinders with additional terminals that serve as ground wires for the equipment within the vehicle. Currently, grounding stakes are often driven into the topsoil manually by hammering. This type of grounding stake presents the following problems:

[0003] First, the working locations of special vehicles change frequently and are often located in the field. The geological conditions vary greatly, and fixed grounding facilities cannot be established at the working locations. In addition, for working locations with high surface hardness, the traditional hammering method is time-consuming and labor-intensive, and is prone to deformation of the grounding piles.

[0004] Second, after the grounding pile is driven into the soil layer, its surface part will become loose after a certain period of time due to the influence of the load in the environment, which will affect the voltage drainage effect of the grounding pile. In severe cases, it will damage the on-board equipment and cause major safety accidents.

[0005] Third, when the grounding pile is withdrawn, the transmission method is lateral hammering to loosen the grounding pile and the soil layer, and the grounding pile is pulled out by manpower. When the grounding pile is firmly fixed, this process is extremely difficult; the grounding pile has a certain degree of flexibility, and it is easy to cause structural damage during lateral hammering, and the vibration generated by the hammering affects the connection of the grounding end, increasing the grounding resistance. Summary of the Invention

[0006] In view of the above analysis, the present invention aims to provide an automatic temporary grounding device to solve the problems that existing grounding piles are easily deformed and loosened and the grounding process is laborious and time-consuming.

[0007] The purpose of the present invention is mainly achieved through the following technical solutions:

[0008] An automatic pulling-out vehicle-mounted temporary grounding device includes a reduction motor and a fixed cylinder, which are fixedly connected; the fixed cylinder is a cavity structure, and a guide block is provided on its inner surface, and the cavity of the fixed cylinder is cooperatively connected to a grounding column, the inner wall of the grounding column is provided with a thread, which is threadedly connected to a threaded screw; the outer wall of the grounding column is provided with a spiral groove, which is spirally connected to the guide block; the bottom end of the grounding column is fixedly connected to a conical structure.

[0009] Furthermore, the grounding column consists of an outer spiral sleeve and an inner connecting sleeve, and the outer spiral sleeve and the inner connecting sleeve are interference-connected; the spiral groove is arranged on the outer wall of the outer spiral sleeve and is spirally connected to the inner surface of the fixed tube.

[0010] Furthermore, a grounding column sealing ring is provided at one end of the inner connecting sleeve, and the outer spiral sleeve and the inner connecting sleeve are interference-connected via the grounding column sealing ring.

[0011] Furthermore, an outer oil circuit is provided in the outer spiral sleeve, a quick connector connection port is provided at the top of the outer spiral sleeve, and an inner oil circuit is provided in the inner connecting sleeve. Furthermore, an oblique hole for mounting an anti-loosening top block is provided radially through the outer spiral sleeve and the inner connecting sleeve.

[0012] Furthermore, the included angle between the axis of the anti-loosening top block installation inclined hole and the axis of the grounding column is 60 degrees to 75 degrees.

[0013] Furthermore, an anti-loosening top block is provided in the anti-loosening top block installation inclined hole, one end of the anti-loosening top block is fixedly connected to an elastic element, and the other end of the elastic element is fixedly connected to the bottom of the anti-loosening top block installation inclined hole.

[0014] Furthermore, the fixing cylinder is provided with a plurality of first screw holes at one end near the reduction motor, and the motor mounting screws are detachably installed in the first screw holes for fixing the reduction motor; the end is also provided with a plurality of second screw holes, and the fixing screws are detachably installed in the second screw holes for fixing the grounding device on the side beam of the vehicle chassis.

[0015] Furthermore, a screw plug and a screw plug sealing ring are fixedly connected to the bottom end of the inner oil circuit.

[0016] Furthermore, an oil port connection hole is provided at one end of the fixing cylinder away from the reduction motor; when the grounding column is fully drilled out, the oil port connection hole is coaxial with the quick connector connection port.

[0017] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0018] (1) The present invention uses a reduction motor to output power and a motor to drive a threaded screw to realize the pushing and retracting of the grounding column. This design avoids the traditional method of manually hammering the grounding pile, realizes the automation of the entire grounding process, avoids a large amount of manpower output, saves labor and time costs.

[0019] (2) The present invention adopts a reduction motor to output power, and the motor drives the threaded screw to realize the pushing out and retracting of the grounding column. The spiral groove on the grounding column cooperates with the guide block to make the grounding column rotate around its own axis. The combination of the two actions achieves the purpose of rotary drilling. The device can be applied to geological conditions with higher hardness. With the help of special vehicle suspension, the grounding column is provided with initial drilling force, which facilitates breaking through the hard topsoil layer and enhances environmental adaptability.

[0020] (3) The present invention welds the guide block to the inner wall of the fixed tube, and the axial spacing is equal to the pitch of the spiral groove on the outer surface of the outer spiral sleeve. That is, the guide block plays a limiting role, so that the grounding column can be extended and retracted at the same distance when the rotation angle inside the fixed tube is the same, thereby realizing the controllability and quantification of the drilling distance of the grounding column.

[0021] (4) The spiral structure on the surface of the grounding column in the present invention not only facilitates the discharge of soil during the drilling process of the grounding column, but also increases the contact area between the grounding column and the soil; the anti-loosening top block set in the temporary grounding device adopts hydraulic drive to enhance the fixing strength of the grounding column, reduce the influence of surface environmental factors on the grounding effect, and reduce safety hazards.

[0022] (5) The grounding column designed in the present invention adopts an inner and outer sleeve structure. The outer sleeve is provided with a spiral groove structure, and the inner sleeve is provided with an oil circuit structure. The two structural parts are connected by interference fit. The grounding column sealing ring ensures the normal operation of the hydraulic oil circuit system to avoid the problem of hydraulic oil leakage and malfunction. At the same time, the spiral groove structure and the oil circuit of the outer sleeve are processed and manufactured separately, which improves the processing technology of the components of the device.

[0023] (6) The grounding column of the present invention is provided with a plurality of inclined holes in the radial direction, and the angle between the axis of the inclined hole and the axis of the grounding column is 60 degrees to 75 degrees, that is, inclined upward. An anti-loosening top block is provided in the inclined hole. After the grounding column is inserted into the specified position, the anti-loosening top block pops out through the elastic element, so that the grounding column is firmly fixed in the soil at the specified position without loosening. At the same time, the anti-loosening top block pops out at an angle of inclined upward, which avoids the problem of the grounding column loosening and falling out upward.

[0024] (7) The temporary grounding device of the present invention is easy to withdraw and retract. The grounding column can be recovered by turning off the vehicle hydraulic system and starting the reduction motor, avoiding the manual hammering and pile pulling process. The pile pulling operation can be completed quickly without damaging the grounding column structure, thereby improving the mobility of special vehicle transfers. The device reserves a connection interface for the chassis side beam, which facilitates the transportation of the device and improves the working mobility of the special vehicle.

[0025] (8) The anti-loosening top block and the elastic element in the temporary grounding device of the present invention realize the automatic retraction effect of the anti-loosening top block. When the anti-loosening top block does not pop out of the inclined hole, the elastic element is in a normal state; when the grounding column is fully extended, the anti-loosening top block pops out of the anti-loosening top block installation inclined hole by the pressure of the oil circuit, and the elastic element is stretched at this time; when the grounding column needs to be retracted, the pressure in the oil circuit is removed, and the elastic element rebounds to retract the anti-loosening top block into the inclined hole.

[0026] In the present invention, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the subsequent description, and some advantages may become obvious from the description or be understood through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are only for the purpose of illustrating particular embodiments and are not to be considered limiting of the present invention. Like reference symbols denote like parts throughout the drawings.

[0028] Figure 1 It is a partial cross-sectional view of the automatic pulling-out temporary grounding device of the present invention;

[0029] Figure 2 This is an exploded view of the automatic pulling-out temporary grounding device of the present invention after the top block is released;

[0030] Figure 3 This is a working state diagram of the automatic pulling-out temporary grounding device of the present invention;

[0031] Figure 4 This is a cross-sectional view of the automatic pulling-out temporary grounding device of the present invention;

[0032] Figure 5 This is a schematic diagram of the fixing tube of the automatic pulling-out temporary grounding device of the present invention;

[0033] Figure 6 This is a schematic diagram of the grounding column of the automatic pulling-out temporary grounding device of the present invention;

[0034] Figure 7 This is a partial enlarged view of the top structure of the automatic temporary grounding device of the present invention;

[0035] Figure 8 This is a partial enlarged view of the bottom structure of the automatic temporary grounding device of the present invention.

[0036] Reference numerals:

[0037] 1-reduction motor; 2-fixing cylinder; 3-grounding column; 4-threaded screw; 5-grounding wire connection port; 6-motor mounting screw; 7-coupling; 8-fixing screw; 9-outer spiral sleeve; 10-inner connecting sleeve; 11-oil port connection hole; 12-guide block; 13-anti-loosening top block mounting inclined hole; 14-quick connector connection port; 15-anti-loosening top block; 16-elastic element; 17-inner oil circuit; 18-screw plug; 19-screw plug sealing ring; 20-conical structure; 21-outer oil circuit; 22-grounding column sealing ring; 23-hydraulic oil pipe; 24-grounding cable; 25-vehicle chassis side beam. DETAILED DESCRIPTION

[0038] An automatic vehicle-mounted temporary grounding device will be described in further detail below in conjunction with specific embodiments. These embodiments are only used for comparison and explanation purposes, and the present invention is not limited to these embodiments.

[0039] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the term "connected" should be understood in a broad sense. For example, it can mean a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection, an electrical connection, a direct connection, or an indirect connection through an intermediate medium. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0040] The terms "top," "bottom," "above," "below," and "on" used throughout the description refer to relative positions of components of a device, such as the relative positions of top and bottom substrates within a device. It will be understood that devices are multifunctional regardless of their orientation in space.

[0041] The working surface of the present invention can be a plane or a curved surface, can be inclined, or can be horizontal. For the convenience of description, the embodiment of the present invention is placed on a horizontal surface and used on the horizontal surface, and "high and low" and "up and down" are defined in this way.

[0042] A specific embodiment of the present invention discloses an automatic pulling-out temporary grounding device, including a reduction motor 1 and a fixed cylinder 2, which are fixedly connected; the fixed cylinder 2 is a cavity structure, and a guide block 12 is welded on its inner surface, and the cavity of the fixed cylinder 2 is cooperatively connected with a grounding column 3, and the inner wall of the grounding column 3 is provided with a thread, which is threadedly connected to the threaded screw 4; the outer wall of the grounding column 3 is provided with a spiral groove, which is spirally connected to the guide block 12; the grounding column 3 is fixedly connected to a conical structure 20 at one end away from the reduction motor 1; the reduction motor 1 is arranged at the top of the fixed cylinder 2.

[0043] Furthermore, the automatic pulling-out temporary grounding device is used for temporary grounding installation of characteristic vehicles.

[0044] Optionally, the grounding column 3 is composed of an outer spiral sleeve 9 and an inner connecting sleeve 10, and the outer spiral sleeve 9 and the inner connecting sleeve 10 are interference-connected; the spiral groove is arranged on the outer surface of the outer spiral sleeve 9.

[0045] Furthermore, multiple guide blocks 12 are provided, and the axial spacing between the two guide blocks 12 is equal to the pitch of the spiral groove on the outer wall of the outer spiral sleeve 9, that is, the guide block plays a limiting role, so that when the grounding column 3 rotates inside the fixed tube 2, the spiral groove moves along the guide block 12, thereby performing the limited extension and contraction operation of the grounding column 3, and realizing the controllability and quantification of the distance the grounding column 3 is drilled into the ground.

[0046] At the same time, the spiral groove on the grounding column 3 cooperates with the guide block 12 to make the grounding column 3 rotate around its own axis. The combination of the two actions achieves the purpose of rotary drilling. The device can be used in geological conditions with higher hardness. With the help of special vehicle suspension, the grounding column is provided with initial drilling force, which facilitates breaking through the hard topsoil layer and enhances environmental adaptability.

[0047] During implementation, the present invention uses the reduction motor 1 as the output power, and utilizes the reduction motor 1 to drive the threaded screw 4 to realize the spiral extension and retraction operation of the grounding column 3. At the same time, the spiral groove on the outer wall of the grounding column 3 cooperates with the guide block 12 to rotate so that the grounding column 3 produces an equidistant rotation around its own axis. The combination of the two actions achieves the purpose of rotating the grounding column 3 to drill into the ground. This design avoids the traditional method of manually hammering the grounding pile to install it, realizes the automation of the entire grounding process, avoids a large amount of manpower output, saves labor and time costs. At the same time, the device can be applied to geological conditions with higher hardness, and uses the special vehicle suspension to provide the grounding column with initial drilling force, which facilitates breaking through the hard topsoil layer and enhances environmental adaptability.

[0048] Furthermore, a boss is provided at the top end of the outer connecting tube 9. After the inner connecting sleeve 10 is interference fit with the outer connecting tube 9, the step of the boss is connected to the upper end of the inner connecting sleeve 10, and the inner wall of the inner connecting sleeve 10 is flush with the inner wall of the boss; the thread is provided on the inner wall of the boss and the inner wall of the inner connecting sleeve 10, and the threads of the two are continuous threads and can be seamlessly connected. The continuous thread is threadedly connected to the threaded screw 4.

[0049] Optionally, a grounding column sealing ring 22 is provided on the upper end face of the inner connecting sleeve 10. After the outer spiral sleeve 9 and the inner connecting sleeve 10 are interference-fitted, the grounding column sealing ring 22 is squeezed and sealed between the boss and the top of the inner connecting sleeve 10. This ensures the proper functioning of the entire hydraulic oil circuit system of the device and prevents hydraulic oil leakage from the oil circuit, which could cause the device to malfunction. The spiral groove structure on the outer wall of the grounding column 3 in the present invention not only facilitates soil drainage during drilling, but also increases the contact area between the grounding column and the soil. The anti-loosening top block provided in the temporary grounding device is hydraulically driven, enhancing the fixing strength of the grounding column, reducing the impact of surface environmental factors on the grounding effect, and minimizing safety hazards.

[0050] Furthermore, four inner oil passages 17 are longitudinally symmetrically arranged in the inner connecting sleeve 10, and the inner oil passages 17 pass through the inner connecting sleeve 10; the spiral groove structure on the outer wall of the outer spiral sleeve 9 and the inner oil passages 17 are separately processed and manufactured, which improves the overall processing technology of the device.

[0051] Furthermore, four outer oil passages 21 are provided inside the boss of the outer spiral sleeve 9 , which are symmetrical to each other and tilted at an angle to the grounding column.

[0052] Furthermore, four circumferentially evenly distributed quick connector connection ports 14 are provided at the top boss of the outer spiral sleeve 9, the top of the inner oil circuit 17 is connected to the bottom of the outer oil circuit 21, each outer oil circuit 21 is located below each corresponding quick connector connection port 14, and the top of the outer oil circuit 21 is connected to the bottom of the quick connector connection port 14.

[0053] Furthermore, an inclined hole 13 penetrating the outer spiral sleeve 9 and the inner connecting sleeve 10 is provided in the radial direction of the outer spiral sleeve 9 and the inner connecting sleeve 10, and the angle between the axis of the anti-loosening top block installation inclined hole 13 and the axis of the grounding column 3 is 60 degrees to 75 degrees.

[0054] Furthermore, a plurality of the anti-loosening top block mounting inclined holes 13 are symmetrically arranged around the outer spiral sleeve 9 and the inner connecting sleeve 10 , and match the positions of the inner oil passage 17 .

[0055] Specifically, the plurality of anti-loosening top block mounting oblique holes 13 are provided with anti-loosening top blocks 15, one end of the anti-loosening top block 15 is fixedly connected to an elastic element 16, the other end of the elastic element 16 is fixedly connected to the bottom wall of the anti-loosening top block mounting oblique hole 13, a movable cavity is provided between the anti-loosening top block 15 and the oblique hole 13, the movable cavity is connected to the inner layer oil circuit 17, that is, the anti-loosening top block 15 is supplied with driving force through the inner layer oil circuit 17. The angle between the axis of the anti-loosening top block mounting oblique hole 13 and the axis of the grounding column 3 is 60 degrees to 75 degrees, that is, in an upward direction. Each anti-loosening top block mounting oblique hole 13 is provided with an anti-loosening top block 15. After the grounding column 3 is inserted into the designated position, the anti-loosening top block 15 is ejected by the elastic element 16, so that the grounding column 3 is firmly fixed in the soil at the designated position, and the problem of the grounding column 3 loosening will not occur. At the same time, the ejected anti-loosening top block 15 is at an upward angle, which avoids the problem of the grounding column 3 loosening and falling out.

[0056] Specifically, when the anti-loosening block 15 does not pop out of the inclined hole 13, the elastic element 16 is in a normal state; when the grounding column 3 is fully extended, the anti-loosening block 15 pops out of the inclined hole due to the pressure of the oil circuit 17, and the elastic element 16 is stretched at this time; when the grounding column needs to be retracted, the pressure in the oil circuit is released, and the elastic element 16 rebounds, causing the anti-loosening block to retract into the inclined hole 13. The reverse working arrangement of the anti-loosening block 15 and the elastic element 16 in the temporary grounding device of the present invention achieves the automatic retraction effect of the anti-loosening block 15.

[0057] Furthermore, the end of the fixing barrel 2, away from the reduction motor 1, is provided with a grounding wire connection port 5 for connecting a grounding wire. The end of the fixing barrel 2, near the reduction motor 1, is provided with multiple first screw holes, each of which is removably fitted with motor mounting screws 6 for securing the reduction motor 1. This end is also provided with multiple second screw holes, each of which is removably fitted with fixing screws 8 for securing the grounding device to the vehicle chassis side frame 25. In other words, the top of the fixing barrel 2 is connected to the reduction motor 1 and secured via the motor mounting screws 6. A mounting platform is provided on the top of the fixing barrel 2, which allows for reliable connection to the vehicle chassis side beam 25 in both horizontal and vertical directions.

[0058] Furthermore, a screw plug 18 and a screw plug sealing ring 19 are fixedly connected to one end of the bottom end of the inner oil circuit 17 to ensure the sealing of the inner oil circuit 17 .

[0059] Furthermore, the end of the fixed cylinder 2 away from the reduction motor 1 is also provided with four oil port connection holes 11; the oil port connection holes 11 are the same size as the quick connector connection port 14. When the grounding column 3 is completely drilled out of the fixed cylinder 2, the oil port connection holes 11 and the quick connector connection port 14 are aligned, and the two are connected coaxially. The grounding column 3 reaches its maximum extension, and the travel switch of the reduction motor 1 is closed, causing the reduction motor 1 to stop. At the same time, the oil port connection holes 11 and the quick connector connection port 14 are coaxial, forming a passage, allowing the drive oil to enter the inner oil circuit 17 and the outer oil circuit 21 through the oil port connection holes 11 and the quick connector connection port 14.

[0060] Specifically, the oil port connection hole 11 is provided with a hydraulic quick connector, which can effectively connect the hydraulic oil pipe 23 with the hydraulic quick connector. When the oil port connection hole 11 is coaxially connected with the quick connector connection port 14, the working hydraulic oil is input into the grounding column 3, applying outward pressure to the anti-loosening top block 15 to make it extend, thereby enhancing the fixing effect of the grounding column 3; the grounding wire connection port 5 is coaxial with the quick connector connection port 14, and is equipped with a grounding cable 24, so that the next task after grounding can be carried out, completing the piling arrangement work of the automatic driving and pulling-out vehicle-mounted temporary grounding device.

[0061] During implementation, the special vehicle chassis suspension is raised, and the fixing cylinder 2 is securely connected to the vehicle chassis side beam 25 using fixing bolts 8. The cable of the reduction motor 1 is connected, and the reduction motor 1 can be controlled by a switch to rotate forward, reverse, and stop. Forward rotation causes the grounding post 3 to be drilled in, and reverse rotation causes the grounding post 3 to be drilled out. After the circuit is connected, the special vehicle chassis suspension is lowered, allowing the bottom cone 20 to penetrate the target topsoil layer. The reduction motor 1 is started to rotate forward, and the output shaft drives the threaded screw 4 axially through the coupling 7. The threaded screw 4 engages with the internal threads at the top of the grounding post 3, and the grounding post 3 extends into the soil. The threaded groove on the outer wall of the grounding post 3 engages with the guide block 12 at the rear of the fixing cylinder 2, and the grounding post 3 rotates as it exits the cylinder, facilitating drilling. When the quick connector connection port 5 at the top of the grounding post 3 is approximately coaxial with the oil port connection hole 11 at the rear of the fixing cylinder 2, the limit switch is closed, and the reduction motor 1 stops. At this point, the grounding post is drilled into place. Install the hydraulic quick connector, turn on the vehicle-mounted hydraulic oil supply system, and input the pressure oil into the outer oil circuit 21 and the inner oil circuit 17 respectively. Finally, the hydraulic pressure acts on the anti-loosening top block 15, and the top block is fully extended, completing the tightening of the grounding column 3; connect the grounding cable connecting plug to the grounding column 3 through the quick connector interface 5 to complete the installation of the grounding cable, and the piling work is now completed. When the special vehicle is transferred and the grounding pile needs to be pulled out, first turn off the on-board electrical equipment and the on-board hydraulic oil supply system, and the pressure oil will flow back to the on-board oil tank. The anti-loosening top block 15 returns to its original position under the action of the spring 16, remove the hydraulic oil pipe 23 and the grounding cable 24, start the reduction motor 1 to reverse the motor, and the grounding column 3 retracts into the fixed tube 2. After it is in place, the travel switch is activated, the reduction motor 1 stops, and the fixing bolt 8 is removed. The grounding device is placed back into the special vehicle cabin or on the side beam to complete the withdrawal of the grounding device.

[0062] The temporary grounding device of the present invention is easy to withdraw and operate. The grounding column can be recovered by turning off the vehicle-mounted hydraulic system and starting the reduction motor, avoiding the manual hammering and pile pulling process. The pile pulling operation can be completed quickly without damaging the grounding column structure, thereby improving the mobility of special vehicle transfers. The device reserves a connection interface for the chassis side beam, which facilitates the transportation of the device and improves the working mobility of the special vehicle.

[0063] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed by the present invention should be covered by the scope of protection of the present invention.

Claims

1. An automatic temporary grounding device, characterized in that: It comprises a reduction motor (1) and a fixed cylinder (2), which are fixedly connected; The fixed cylinder (2) is a cavity structure, and a guide block (12) is provided on its inner surface. The cavity of the fixed cylinder (2) is connected to a grounding column (3). The inner wall of the grounding column (3) is provided with a thread, which is threadedly connected to the threaded screw (4); the outer wall of the grounding column (3) is provided with a spiral groove, which is threadedly connected to the guide block (12). The bottom end of the grounding column (3) is fixedly connected to a cone structure (20); The grounding column (3) is composed of an outer spiral sleeve (9) and an inner connecting sleeve (10), and the outer spiral sleeve (9) and the inner connecting sleeve (10) are interference-connected; The spiral groove is provided on the outer wall of the outer spiral sleeve (9) and is spirally connected to the inner surface of the fixed cylinder (2); An outer oil circuit (21) is provided in the outer spiral sleeve (9), and a quick connector connection port (14) is provided at the top of the outer spiral sleeve (9); an inner oil circuit (17) is provided in the inner connecting sleeve (10); The outer spiral sleeve (9) and the inner connecting sleeve (10) are provided with anti-loosening top block mounting inclined holes (13) in the radial direction; An anti-loosening top block (15) is provided in the anti-loosening top block installation inclined hole (13), one end of the anti-loosening top block (15) is fixedly connected to an elastic element (16), and the other end of the elastic element (16) is fixedly connected to the bottom of the anti-loosening top block installation inclined hole (13); The threaded screw (4) cooperates with the internal thread of the top of the grounding column (3), and the thread groove on the outer wall of the grounding column (3) cooperates with the guide block (12) at the tail of the fixed cylinder (2).

2. The automatic temporary grounding device according to claim 1, characterized in that: A grounding column sealing ring (22) is provided at one end of the inner connecting sleeve (10), and the outer spiral sleeve (9) and the inner connecting sleeve (10) are interference-connected via the grounding column sealing ring (22).

3. The automatic temporary grounding device according to claim 2, characterized in that: The included angle between the axis of the anti-loosening top block installation inclined hole (13) and the axis of the grounding column (3) is 60 degrees to 75 degrees.

4. The automatic temporary grounding device according to claim 1, characterized in that: The fixing cylinder (2) has a plurality of first screw holes at one end near the reduction motor (1), wherein the first screw holes are detachably mounted with motor mounting screws (6) for fixing the reduction motor (1); the same end is also provided with a plurality of second screw holes, wherein the second screw holes are detachably mounted with fixing screws (8) for fixing the grounding device on the vehicle chassis side beam (25).

5. The automatic temporary grounding device according to claim 1, characterized in that: The bottom end of the inner oil circuit (17) is fixedly connected to a screw plug (18) and a screw plug sealing ring (19).

6. The automatic temporary grounding device according to claim 1, characterized in that: An oil port connection hole (11) is also provided at one end of the fixing cylinder (2) away from the reduction motor (1); when the grounding column (3) is fully drilled out, the oil port connection hole (11) is coaxial with the quick connector connection port (14).

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