CN219672434U - Automobile back door driving stay bar - Google Patents

Abstract

The utility model discloses an automobile back door driving stay bar, which comprises a movable sleeve and a fixed sleeve, wherein an upper ball socket assembly is arranged at the end part of the movable sleeve, a lower ball socket assembly is arranged at the end part of the fixed sleeve, the movable sleeve stretches out or withdraws relative to the fixed sleeve, a power area and a transmission area are arranged in the fixed sleeve, a torque motor and a gear box in transmission connection with large tooth socket torque are arranged in the power area, a transmission assembly is arranged in the transmission area, the gear box is connected with the transmission assembly through a coupler, the transmission assembly is connected with the movable sleeve, and the manual operation of a user can be kept at a small force under the action of rotation inertia in the opening process of the stay bar, so that the stay bar opening process is more convenient and smoother.

Description

Automobile back door driving stay bar

Technical Field

The utility model relates to the technical field of automobile stay bars, in particular to an automobile back door driving stay bar.

Background

At present, an electric stay bar assembly is connected with a tail gate of an automobile and is used for driving the tail gate of the automobile to open, after the tail gate of the automobile is opened, reverse torque can be applied to the electric stay bar assembly due to the weight of the electric stay bar assembly, a resistance device is usually arranged in a transmission line inside the electric stay bar assembly for controlling the tail gate of the automobile to be in an open position so as to keep the tail gate of the automobile to be in a hovering position, the resistance device usually adopts a damper arranged between a motor and a screw rod assembly, the damper comprises a damper shell, a gasket assembly formed by overlapping a plurality of gaskets, and a spring and an end cover which are abutted against the gasket assembly, so that axial compression force is applied to the gasket assembly, at least one of the gasket assemblies can be in transmission connection with the screw rod assembly, reverse torque is applied to the screw rod assembly through rotation friction, and hovering of the electric stay bar is realized,

this kind of electronic vaulting pole is because the setting of its inside attenuator, and the integral length of electronic vaulting pole has tended to have increased, leads to electronic vaulting pole inner structure too complicated, and manufacturing cost and assembly degree of difficulty are too high, and in addition, electronic vaulting pole sealing waterproof performance among the prior art is not good.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model aims to provide an automobile back door driving stay bar.

The technical aim of the utility model is realized by the following technical scheme: the utility model provides an automobile back door drive vaulting pole, includes movable sleeve and fixed sleeve, movable sleeve's tip is equipped with ball socket subassembly, fixed sleeve's tip is equipped with ball socket subassembly down, just movable sleeve is set up to be stretched out or withdraw for relative fixed sleeve, power area and drive area have been arranged in the fixed sleeve, torque motor has been arranged in the power area to and with big tooth's socket torque transmission engaged gear box, be provided with drive assembly in the drive area, through a shaft coupling joint between gear box and the drive assembly, drive assembly and movable sleeve joint.

Further, the torque motor comprises a rotor assembly and a plurality of magnetic poles arranged on the periphery of the rotor assembly, the rotor assembly comprises a plurality of rotor punching sheets, a plurality of tooth parts extend relative to the center of each rotor punching sheet, the tooth parts are provided with arc parts and trimming edges on the periphery of each tooth part, grooves for connecting the arc parts with the trimming edges are formed in the periphery of each tooth part, and the trimming edges on two adjacent tooth parts are arranged in a vertical angle mode.

Further, the transmission assembly comprises a screw rod main shaft and a driving shaft arranged on the screw rod main shaft, the driving shaft comprises a transmission section fixedly connected with the upper ball socket assembly and a nut section combined with the screw rod main shaft, and the transmission section and the nut section are integrally arranged.

Further, a cavity allowing the end part of the screw spindle to be placed in the transmission section is formed in the transmission section, a limiting ring is arranged at the end part of the screw spindle, and the limiting ring abuts against the inner boundary of the cavity and limits the driving shaft from falling off relative to the screw spindle.

Further, the sealing assembly comprises a first sealing element arranged between the movable sleeve and the fixed sleeve, the first sealing element is embedded in the opposite wall of the movable sleeve or the fixed sleeve, and the first sealing element closes a gap between the movable sleeve and the fixed sleeve and allows the movable sleeve and the fixed sleeve to move relatively.

Further, the first seal has a plurality of sealing projections arranged with respect to an axial direction, the sealing projections abutting on the other opposing wall of the movable sleeve and the stationary sleeve.

Further, a seal assembly is included that includes a second seal abutting between the upper ball and socket assembly and the movable sleeve that blocks a gap between the drive assembly and the movable sleeve.

Further, still the butt has the shock pad between torque motor and the lower ball socket subassembly, the shock pad includes:

the first joint part is arranged on the periphery of the shock pad and is in abutting contact with the fixed sleeve;

the second joint part is arranged in the power area, the torque motor comprises a shell and an end cover, a first slot matched with the second joint part is formed in the end cover, a riveting part arranged in the first slot is formed in the shell, and the second joint part is abutted to the riveting part and is in cohesion with the first slot;

the second slot is opened towards the lower ball socket assembly, and a third joint part which is abutted in the second slot is arranged on the lower ball socket assembly.

Further, still be equipped with sensing assembly between power area and the lower ball socket subassembly, sensing assembly is including inlaying the circuit board of establishing in the ball socket subassembly down, arranges induction piece and the magnetic ring at the torque motor afterbody, the induction area that is used for supplying the magnetic ring holding is defined between circuit board and the torque motor position, form in the ball socket subassembly down and be used for supplying circuit board circuit holding and the wiring region of drawing forth, the torque motor afterbody still is equipped with the conducting strip, the conducting strip wears to locate induction area and puts into in the wiring region.

Further, the outside of ball socket subassembly is equipped with the terminal pipe of intercommunication wiring region down, the last closed wired cover of terminal pipe, terminal pipe tip is equipped with the snap ring, be equipped with in the line cover and be used for with snap ring tight fit's back-off groove.

Compared with the prior art, the utility model has the following advantages and beneficial effects: 1. the damper is omitted, the torque motor is adopted to provide the holding force of the stay bar transmission system in a stop state, the torque motor is directly connected with the gear box, the holding force is amplified through the gear box to realize hovering of the stay bar, so that the internal parts of the stay bar are reduced, the internal structure of the stay bar is simplified, the assembly efficiency is improved, the cost is reduced, and meanwhile, the manual operation of a user can be kept at a smaller force under the action of rotation inertia of the stay bar in the opening process due to the fact that the restraint of the damper is not provided, and the stay bar opening process is more convenient and smoother;

2. through setting up first sealing member between movable sleeve and fixed sleeve, set up the second sealing member between last ball socket subassembly and movable sleeve, extend the wiring pipe on the ball socket subassembly down, the outer wiring cover of wiring pipe, and the wiring pipe is put into the line cover to with the back-off groove joint in the line cover realizes the full sealedly of vaulting pole.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic cross-sectional view of the present utility model;

FIG. 3 is an enlarged view of FIG. 2A;

FIG. 4 is an enlarged view of the portion B of FIG. 2;

FIG. 5 is an enlarged view of FIG. 2C;

FIG. 6 is a partial exploded view of the present utility model;

FIG. 7 is a schematic view of a stop collar according to the present utility model;

FIG. 8 is a cross-sectional view of the lower ball and socket assembly of the present utility model;

FIG. 9 is a schematic view of a rotor sheet of the present utility model;

in the figure: 1. a movable sleeve; 1.1, a mounting groove;

2. fixing the sleeve; 3. an upper ball socket assembly;

4. a lower ball socket assembly; 4.1, wiring area; 4.2, a wiring tube; 4.21, snap ring; 4.3, wire sleeve; 4.31, a back-off groove; 4.32, annular protrusions; 4.4, a third joint;

5. a power region; 6. a transmission region;

7. a torque motor; 7.1, a shell; 7.11, a riveting part; 7.2, end caps; 7.21, a first slot; 7.3, conducting strips;

7.4, teeth; 7.41, an arc part; 7.42, trimming; 7.43, grooves;

8. a gear box;

9. a transmission assembly; 9.1, a screw spindle; 9.2, driving shaft; 9.21, a transmission section; 9.22, nut segments; 9.23, cavity; 9.24, reinforcing ribs; 9.3, limiting rings; 9.31, arm extension; 9.4, a gasket;

10. a first seal; 10.1, sealing the lobe;

11. a second seal; 11.1, connecting columns; 11.2, a ring body;

12. a shock pad; 12.1, a first joint; 12.2, a second joint; 12.3, a second slot;

13. a sensing assembly; 13.1, an induction piece; 13.2, a magnetic ring; 13.3, a circuit board; 13.4, an induction area; 14. a coupling;

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It will be understood that, although the terms upper, middle, lower, top, end, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another for ease of understanding and are not used to define any directional or sequential limitation.

As shown in fig. 1-9, a driving stay bar for a back door of an automobile comprises a movable sleeve 1 and a fixed sleeve 2, wherein an upper ball socket assembly 3 is arranged at the end part of the movable sleeve 1, a lower ball socket assembly 4 is arranged at the end part of the fixed sleeve 2, and the movable sleeve 1 is arranged to extend or retract relative to the fixed sleeve 2, so that the back door of the automobile is driven to be opened and closed relatively.

As can be seen from fig. 5, wherein a power zone 5 and a transmission zone 6 are arranged in the fixed sleeve 2 in the axial direction, a torque motor 7 is arranged in the power zone 5, and a gear box 8 in torque transmission engagement with a large tooth space is arranged in the transmission zone 6, a transmission assembly 9 is arranged in the transmission zone 6, the gear box 8 is engaged with the transmission assembly 9 through a coupling 14, the transmission assembly 9 is engaged with the movable sleeve 1, during operation, the torque motor 7 provides positive rotation torque and is transmitted to the transmission assembly 9 through the gear box 8 and the coupling 14, so that the movable sleeve 1 is driven to act, and in a hovering state, the torque motor 7 provides rotation preventing torque and is amplified through the gear box 8 and is transmitted to the transmission assembly 9 through the coupling 14, so that hovering of a stay bar is realized.

It should be noted that the gear box is not further explained in the present utility model, and the gear box is only required to be capable of performing the transmission and deceleration functions between the transmission assembly and the torque motor, and is optionally a multi-stage planetary gear module.

As a further embodiment of the torque motor, the torque motor comprises a rotor assembly and a plurality of magnetic poles arranged on the periphery of the rotor assembly, the rotor assembly comprises a plurality of rotor punching sheets, a plurality of tooth parts 7.4 extend from the center of the rotor punching sheets, the tooth parts 7.4 are provided with arc parts 7.41 and trimming edges 7.42 on the periphery of the tooth parts, grooves 7.43 for connecting the arc parts and the trimming edges are arranged in a vertical angle manner on the adjacent two tooth parts.

Specifically, this torque motor is four and just about central distribution, be equipped with the side cut on two adjacent tooth portions, wherein, the circular arc portion external diameter of rotor punching is phi 23.4 ± 0.03mm, two adjacent tooth portions mutually perpendicular, about the side cut 7.42 on two tooth portions 7.4 that the center is relative parallel to each other, and the interval is 22.7 ± 0.1mm, the quantity of tooth portion is six, be equipped with the side cut on four tooth portions wherein, the side cut sets up with the magnetic pole is relative, the recess specifically sets up on the side cut, and the interval on the recess edge is 2mm.

Through the improvement, the arc part on the rotor component is more adjacent to the magnetic pole, thereby improving the attractive force of the magnetic pole to the arc part, and under the action of larger attractive force, the rotor component can always keep at the self-locking position of the arc part to the magnetic pole, and in the rotating process of the rotor, the distance between the magnetic pole and the surface of the rotor component is switched back and forth from the mutually close position to the mutually far position, so that the attractive force of the magnetic pole to the rotor component has a regular magnetic attraction section, thereby increasing the cogging torque,

the groove is arranged at the adjacent joint of the trimming and the arc part, so that the attractive force of the magnetic pole can be cut off from the original change along with the angle, the phenomenon of unstable self-locking during use is avoided, the torque action section is increased in the same rotation period, and the holding effect in the rotation period is improved.

As a further embodiment of the transmission assembly 9, the transmission assembly 9 comprises a screw spindle 9.1 and a drive shaft 9.2 arranged on the screw spindle 9.1, the drive shaft 9.2 comprises a transmission section 9.21 fixedly connected with the upper ball socket assembly 3 and a nut section 9.22 combined with the screw spindle 9.1, the transmission section 9.21 is integrally arranged with the nut section 9.22, and the periphery of the nut section 9.22 is provided with a reinforcing rib 9.24 to ensure stable transmission of the drive shaft 9.2 and the screw spindle 9.1.

Preferably, the drive shaft 9.2 is made of plastic material, so as to further reduce the manufacturing cost of the stay.

Specifically, the transmission section 9.21 is provided with a cavity 9.23 which allows the end part of the screw spindle 9.1 to be placed in the transmission section, the end part of the screw spindle 9.1 is provided with a limiting ring 9.3, the limiting ring 9.3 abuts against the inner boundary of the cavity 9.23, and the driving shaft 9.2 is limited to deviate from the screw spindle 9.1.

The two ends of the limiting ring 9.3 are provided with washers 9.4, one washer 9.4 is extruded between the end part of the screw spindle 9.1 and the limiting ring 9.3, the other washer 9.4 is extruded between the limiting ring 9.3 and the inner boundary of the cavity 9.23, the limiting ring 9.3 is provided with spreading arms 9.31 uniformly distributed on the periphery of the limiting ring, one ends of the spreading arms 9.31 extend on the limiting ring 9.3, the other ends of the spreading arms are arranged in a circumferential direction and form free ends, the free ends and the limiting ring 9.3 are provided with protruding parts for propping against the inner wall of the driving shaft 9.2, and the spreading arms 9.31 can be folded and unfolded relatively to the limiting ring 9.3, so that certain resistance is applied in the relative rotation process of the screw spindle 9.1 and the driving shaft 9.2, and the transmission stability of the two is ensured.

As shown in fig. 4, as an optimization of the sealing in the stay bar of the present utility model, the stay bar further comprises a sealing assembly, wherein the sealing assembly comprises a first sealing element 10 arranged between the movable sleeve 1 and the fixed sleeve 2, the first sealing element 10 is embedded in the opposite wall of the movable sleeve 1 or the fixed sleeve 2, the first sealing element 10 closes the gap between the movable sleeve 1 and the fixed sleeve 2, and the first sealing element 10 is made of an elastic material, so that the first sealing element 10 can elastically deform, thereby allowing the movable sleeve 1 and the fixed sleeve 2 to move relatively.

The first seal 10 may be disposed on the movable sleeve 1 or on the fixed sleeve 2.

In particular, the first seal 10 has a plurality of sealing projections 10.1 arranged with respect to the axial direction, the sealing projections 10.1 being arranged in the form of an annular ring, the sealing projections 10.1 abutting against the other opposite wall of the movable sleeve 1 and the stationary sleeve 2, so as to form a multi-seal on the first seal 10, so as to achieve a sealing engagement between the movable sleeve 1 and the stationary sleeve 2.

As shown in fig. 3, as an optimization of the seal between the upper ball and socket assembly 3 and the movable sleeve 1, the seal assembly comprises a second seal 11 abutting between the upper ball and socket assembly 3 and the movable sleeve 1, the second seal 11 obstructing the gap between the transmission assembly 9 and the movable sleeve 1.

Wherein the end of the movable sleeve 1 is provided with a mounting groove 1.1 for placing the upper ball socket assembly 3 therein, and the driving shaft 9.2 and the upper ball socket assembly 3 are jointed in the mounting groove 1.1.

Specifically, the second sealing member 11 is an annular gasket, and a plurality of connecting columns 11.1 extend on the end face of the second sealing member 11, a plurality of hole sites are arranged at the position, close to the outer boundary, of the mounting groove 1.1, the hole sites on the mounting groove 1.1 are tightly matched with the connecting columns 11.1 in a plugging mode, and the upper ball socket assembly 3 is abutted to the connecting columns 11.1.

Preferably, the second seal 11 also has annular bodies 11.2 extending radially on both sides of the connecting post 11.1, i.e. the annular bodies 11.2 extend towards the boundary of the mounting groove 1.1 and the mating of the drive shaft 9.2 with the upper socket assembly 3 or the threading of the drive shaft 9.2 into the mounting groove 1.1, so that the seal between the movable sleeve 1 and the upper socket assembly 3 is achieved by the second seal 11.

As shown in fig. 5 and 6, as the sealing optimization between the lower ball socket assembly 4 and the fixed sleeve 2, a wiring area 4.1 for accommodating and leading out a circuit board 13.3 is formed inside the lower ball socket assembly 4, a wiring tube 4.2 communicated with the wiring area 4.1 is arranged outside the lower ball socket assembly 4, a wire sleeve 4.3 is closed on the wiring tube 4.2, a clamping ring 4.21 is arranged at the end part of the wiring tube 4.2, and a back-off groove 4.31 used for being tightly matched with the clamping ring 4.21 is arranged in the wire sleeve 4.3.

Alternatively, the lower ball socket assembly 4 is fitted with the fixed sleeve 2 and welded to achieve a seal between the lower ball socket assembly 4 and the fixed sleeve 2.

Specifically, a plurality of annular protrusions are further arranged in the opening end of the wire tube, are distributed at intervals in the axial direction, and are tightly abutted against the wiring tube 4.2.

Through the improvement, with the outside of the integrative setting of wire casing 4.2 at ball socket subassembly 4 down for wire casing 4.3 can be external on wire casing 4.2, and when wire casing 4.3 was placed with ascending gesture, its outside water can descend along wire casing 4.3 and wire casing 4.2, and left wire casing 4.2, and when wire casing 4.3 was placed with the decurrent gesture, its outside water can be separated by a plurality of annular protruding and back-off groove 4.31, realizes the sealed of ball socket subassembly 4 down.

As shown in fig. 6, as an embodiment of the torque motor 7 mounted in the fixed sleeve 2, a damper 12 is further abutted between the torque motor 7 and the lower ball and socket assembly 4, and the damper 12 includes:

a first joint 12.1, wherein the first joint 12.1 is arranged on the periphery of the shock pad 12 and is abutted against the fixed sleeve 2;

the second joint part 12.2, the second joint part 12.2 is placed in the power area 5, the torque motor 7 comprises a shell 7.1 and an end cover 7.2, a first slot 7.21 matched with the second joint part 12.2 is arranged on the end cover 7.2, a riveting part 7.11 placed in the first slot 7.21 is arranged on the shell 7.1, and the second joint part 12.2 is abutted against the riveting part 7.11 and is clasped in the first slot 7.21;

the second slot 12.3, the second slot 12.3 opens towards the lower ball and socket assembly 4, and the lower ball and socket assembly 4 is provided with a third joint part 4.4 abutting in the second slot 12.3.

Through above improvement, set up shock pad 12 under between ball socket assembly 4 and the torque motor 7, and shock pad 12 can be with fixed sleeve 2 joint for the space arrangement of vaulting pole afterbody is compacter, effectively reduces noise and the vibrations that torque motor 7 produced in the course of the work.

Specifically, a sensing assembly 13 is further arranged between the power area 5 and the lower ball socket assembly 4, the sensing assembly 13 comprises a circuit board 13.3 embedded in the lower ball socket assembly 4, an induction part 13.1 and a magnetic ring 13.2 are arranged at the tail part of the torque motor 7, an induction area 13.4 for accommodating the magnetic ring 13.2 is defined between the circuit board 13.3 and the torque motor 7, a wiring area 4.1 for accommodating and leading out a circuit of the circuit board 13.3 is formed in the lower ball socket assembly 4, a conducting strip 7.3 is further arranged at the tail part of the torque motor 7, the conducting strip 7.3 penetrates through the induction area 13.4 and is embedded in the wiring area 4.1, a shock pad 12 is enclosed at the periphery of the induction area 13.4, and a safe induction distance between the magnetic ring 13.2 and the induction part 13.1 is ensured through the conducting strip 7.3 and the shock pad 12.

The present embodiment is only for explanation of the present utility model and is not to be construed as limiting the present utility model, and modifications to the present embodiment, which may not creatively contribute to the present utility model as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present utility model.

Claims (10)

1. The utility model provides an automobile back door drive vaulting pole, includes activity sleeve pipe (1) and fixed sleeve (2), the tip of activity sleeve pipe (1) is equipped with ball and socket assembly (3), the tip of fixed sleeve (2) is equipped with ball and socket assembly (4) down, just activity sleeve pipe (1) are set up to stretch out or withdraw relative fixed sleeve pipe (2), a serial communication port, arrange power region (5) and drive region (6) in fixed sleeve pipe (2), torque motor (7) have been arranged in power region (5) to and with big tooth's socket torque transmission engaged gear box (8), be provided with drive assembly (9) in drive region (6), joint through a shaft coupling (14) between gear box (8) and drive assembly (9), drive assembly (9) are articulated with activity sleeve pipe (1).

2. An automotive tailgate drive stay according to claim 1, wherein: the torque motor comprises a rotor assembly and a plurality of magnetic poles arranged on the periphery of the rotor assembly, the rotor assembly comprises a plurality of rotor punching sheets, a plurality of tooth parts (7.4) extend from the center of each rotor punching sheet, the tooth parts (7.4) are provided with arc parts (7.41) and trimming edges (7.42) on the periphery of each tooth part, grooves (7.43) for connecting the arc parts with the trimming edges are formed in the mode that the trimming edges on two adjacent tooth parts (7.4) are arranged in a vertical angle.

3. An automotive tailgate drive stay according to claim 1, wherein: the transmission assembly (9) comprises a screw spindle (9.1) and a driving shaft (9.2) arranged on the screw spindle (9.1), wherein the driving shaft (9.2) comprises a transmission section (9.21) fixedly connected with the upper ball socket assembly (3) and a nut section (9.22) combined with the screw spindle (9.1), and the transmission section (9.21) and the nut section (9.22) are integrally arranged.

4. A vehicle tailgate drive stay according to claim 3 wherein: the transmission section (9.21) is internally provided with a cavity (9.23) allowing the end part of the screw spindle (9.1) to be placed in the cavity, the end part of the screw spindle (9.1) is provided with a limiting ring (9.3), the limiting ring (9.3) is propped against the inner boundary of the cavity (9.23), and the driving shaft (9.2) is limited to be separated from the screw spindle (9.1).

5. An automotive tailgate drive stay according to claim 1, wherein: still include seal assembly, seal assembly is including setting up first sealing member (10) between activity sleeve pipe (1) and fixed sleeve pipe (2), first sealing member (10) inlay and establish in the relative wall of activity sleeve pipe (1) or fixed sleeve pipe (2), just first sealing member (10) closure clearance between activity sleeve pipe (1) and fixed sleeve pipe (2), and allow activity sleeve pipe (1) and fixed sleeve pipe (2) are relative movable.

6. An automotive tailgate drive stay according to claim 5 wherein: the first seal (10) has a plurality of sealing projections (10.1) arranged in relation to the axial direction, the sealing projections (10.1) abutting against the other opposing wall of the movable sleeve (1) and the stationary sleeve (2).

7. An automotive tailgate drive stay according to claim 1, wherein: the ball joint comprises a ball joint assembly (3), a movable sleeve (1) and a sealing assembly, wherein the ball joint assembly comprises a first sealing element (11) which is abutted between the ball joint assembly (3) and the movable sleeve (1), and the first sealing element (11) is blocked in a gap between the transmission assembly (9) and the movable sleeve (1).

8. An automotive tailgate drive stay according to claim 1, wherein: still butt has shock pad (12) between torque motor (7) and lower ball socket subassembly (4), shock pad (12) include:

a first joint part (12.1), wherein the first joint part (12.1) is arranged on the periphery of the shock pad (12) and is in abutting contact with the fixed sleeve (2);

the torque motor (7) comprises a shell (7.1) and an end cover (7.2), wherein a first slot (7.21) matched with the second joint (12.2) is formed in the end cover (7.2), a riveting part (7.11) placed in the first slot (7.21) is formed in the shell (7.1), and the second joint (12.2) is abutted to the riveting part (7.11) and is cohesive in the first slot (7.21);

the second slot (12.3), the second slot (12.3) is opened towards the lower ball socket assembly (4), and a third joint part (4.4) which is abutted in the second slot (12.3) is arranged on the lower ball socket assembly (4).

9. An automotive tailgate drive stay according to claim 1, wherein: the sensor comprises a power area (5) and a lower ball socket assembly (4), wherein a sensing assembly (13) is further arranged between the power area (5) and the lower ball socket assembly (4), the sensing assembly (13) comprises a circuit board (13.3) embedded in the lower ball socket assembly (4), a sensing piece (13.1) and a magnetic ring (13.2) are arranged at the tail of a torque motor (7), a sensing area (13.4) for accommodating the magnetic ring (13.2) is defined between the circuit board (13.3) and the torque motor (7), a wiring area (4.1) for accommodating and leading out a circuit of the circuit board (13.3) is formed in the lower ball socket assembly (4), a conducting strip (7.3) is further arranged at the tail of the torque motor (7), and the conducting strip (7.3) penetrates through the sensing area (13.4) and is arranged in the wiring area (4.1).

10. An automotive tailgate drive stay according to claim 9 wherein: the outside of ball socket subassembly (4) down is equipped with wiring pipe (4.2) of intercommunication wiring district (4.1), close wired cover (4.3) on wiring pipe (4.2), wiring pipe (4.2) tip is equipped with snap ring (4.21), be equipped with in line cover (4.3) be used for with snap ring (4.21) tight fit's back-off groove (4.31).