CN113911064A

CN113911064A - Intelligent active pre-tightening safety belt device for commercial vehicle

Info

Publication number: CN113911064A
Application number: CN202111021867.1A
Authority: CN
Inventors: 吴伯明
Original assignee: Hubei Dongfeng Shixing Auto Parts Co ltd
Current assignee: Hubei Dongfeng Shixing Auto Parts Co ltd
Priority date: 2021-09-01
Filing date: 2021-09-01
Publication date: 2022-01-11

Abstract

The invention discloses an intelligent active pre-tightening safety belt device for a commercial vehicle, which comprises a base, a speed change mechanism, a retractor component, an automatic recovery mechanism and a locking mechanism, wherein the base is provided with a motor, the motor is connected with the base through a mounting plate, the speed change mechanism is arranged on the base, the output end of the motor is in transmission connection with the input end of the speed change mechanism, the retractor component is arranged above the base, and the output end of the speed change mechanism is connected with the retractor component. The safety problem caused by the fact that the braid is not recovered in place or the coil spring is recovered to be invalid is avoided.

Description

Intelligent active pre-tightening safety belt device for commercial vehicle

Technical Field

The invention relates to the technical field of automobile accessories, in particular to an intelligent active pre-tightening safety belt device for a commercial vehicle.

Background

The automobile seat belt is a safety device for restraining a passenger in a collision, and for avoiding a secondary collision between the passenger and a steering wheel, an instrument panel, or the like in the collision or a crash injury caused by the passenger being out of the vehicle in the collision. A vehicle seat belt, also known as a seat belt, is one type of occupant restraint device. The automobile seat belt is the most inexpensive and effective safety device recognized, and the seat belt is mandatory in many countries in the vehicle.

Most of safety belt products in the existing market have the following defects: most of the existing safety belts for commercial vehicles are not provided with motors, so that the safety belts cannot be locked by the driving of the motors, and when the vehicles run and deviate from lanes or collide, the safety belts cannot play a role in quickly pre-tightening to protect the safety of drivers and passengers before human bodies feel the collision; simultaneously when using the safety belt, when the hasp is locked or the unblock, the safety belt exists because of the meshbelt is retrieved not in place or retrieve the safety problem that the coil spring became invalid and cause, and there is the meshbelt in the safety belt use and retrieve the inability, the condition that the meshbelt was retrieved not in place, only tighten up through retrieving the torsional spring, the service life is inefficacy easily after longer, thereby influence the use sense, even arouse the safety problem because the safety belt became invalid, current safety belt does not possess the function of slope locking simultaneously, the coiler is when taking place excessive slope, can't reach the locking state, and influence the use of safety belt, simultaneously when the vehicle in-process accident leads to the safety belt to draw to the outside fast, do not possess the function of accelerating the locking, influence the security of safety belt equally.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, and provides an intelligent active pre-tightening type safety belt device for a commercial vehicle, which comprises a base, a speed change mechanism, a retractor assembly, an automatic recovery mechanism and a locking mechanism, wherein the base is provided with a motor, the motor is connected with the base through a mounting plate, the speed change mechanism is arranged on the base, the output end of the motor is in transmission connection with the input end of the speed change mechanism, the retractor assembly is arranged above the base, the output end of the speed change mechanism is connected with the retractor assembly, the lower part of the base is connected with the automatic recovery mechanism through a gasket, the automatic recovery mechanism is connected with the bottom end of the retractor assembly, the locking mechanism is arranged above the retractor assembly, and the locking mechanism is connected with the retractor assembly through a retractor bracket.

As preferred, speed change mechanism includes driving gear, driven gear, worm and drive ring gear, the driving gear set up in on the motor output, the other perpendicular meshing of driving gear one end driven gear, driven gear cover is located worm one end is served, the worm is kept away from driven gear one end with the external tooth meshing of drive ring gear, the driving gear the driven gear the worm with drive ring gear all sets up in the mounting groove, the mounting groove is seted up in the base, the driving gear constitutes with driven gear cooperation speed change mechanism's input with the motor output end transmission is connected, the worm with drive ring gear cooperation constitutes speed change mechanism's output with the coiler subassembly is connected.

Preferably, the retractor assembly comprises a retractor support, a rolling wheel, a rotating shaft, a transmission bottom ring, limiting blocking pieces, a first pawl, a second pawl and an auxiliary gasket, the retractor support is connected with the base through a locking bolt, the rolling wheel is arranged in the retractor support, an inner gear ring is arranged outside the top end of the rolling wheel and arranged in the top end of the retractor support, the rotating shaft is arranged in the rolling wheel, the bottom end of the rotating shaft is connected with the transmission column block, the transmission bottom ring is arranged outside the bottom end of the rotating shaft and connected with the bottom end of the rolling wheel, inner teeth are arranged on the inner wall of the transmission bottom ring, a plurality of limiting blocking pieces are uniformly distributed on the circumference taking the rotating shaft as the circle center, the limiting blocking pieces are arranged into an outer ring limiting blocking piece group and an inner ring limiting blocking piece group, and two groups of first pawls are symmetrically arranged in the transmission bottom ring in a left-right mode taking the rotating shaft as the symmetric center, the first pawl is arranged between the limiting blocking pieces, the second pawl is arranged in the top end of the winding wheel, the second pawl is movably arranged in a limiting groove, the limiting groove is formed in the top end of the winding wheel, a limiting rod is arranged at the top end of the second pawl, the auxiliary gasket is sleeved outside the top end of the rotating shaft, and one end of the second pawl is meshed with the inner gear ring.

Preferably, a limiting sliding groove is formed in the transmission gear ring, the limiting sliding groove is connected with the first pawl, and the auxiliary gasket is arranged at the top end of the winding wheel.

Preferably, the locking mechanism comprises a steel ball, a lever, a locking gear ring, a third pawl, an inertia block, an auxiliary locking end cover and a top shell, the top end of the retractor support is provided with a steel ball placing frame, the steel ball is arranged in the steel ball placing frame, the steel ball placing frame is hinged with the lever, the lever is arranged beside one end of the steel ball placing frame, the locking gear ring is arranged beside one end of the lever away from the steel ball placing frame, the outer ring surface of the locking gear ring is provided with external teeth, the locking gear ring is sleeved on the rotating shaft, the locking gear ring is internally provided with a positioning column, the positioning column is movably connected with the third pawl, the upper end of the third pawl is provided with the inertia block, the inertia block is arranged in the locking gear ring, the auxiliary locking end cover is sleeved on the locking gear ring, an inner gear ring is arranged in the auxiliary locking end cover and is meshed with the third pawl, the auxiliary locking end cover is sleeved with the top shell, and the top shell is connected with the retractor support through a locking bolt.

Preferably, the auxiliary gasket set up in the locking ring gear with between the take-up pulley, set up the spacing groove in the locking ring gear, set up in the spacing groove the gag lever post, automatic recovery mechanism the coiler subassembly with locking mechanism is on same central line, motor one end electric connection signal line, the safety belt is established to the take-up pulley outer winding cover.

As preferred, automatic mechanism of retrieving includes drain pan, clockwork spring, gasket and transmission column piece, set up in the drain pan clockwork spring, clockwork spring center department one end with the transmission column piece is connected, clockwork spring outer lane end with the drain pan is connected, the overcoat of transmission column piece is established the gasket, the gasket set up in clockwork spring with between the base, the drain pan pass through locking bolt with the base bottom is connected.

The invention has the beneficial effects that: the safety belt is driven by the motor to quickly tighten the safety belt, so that the safety belt can be quickly pre-tightened to protect the safety of a driver and passengers before a human body feels collision;

when the safety belt is used, and the lock catch is locked or unlocked, the motor works after receiving an instruction signal sent by a vehicle control system, and the motor drives the speed change mechanism and the automatic recovery mechanism to quickly tighten the safety belt, so that the safety problem caused by the improper recovery of the woven belt or the failure of a recovery coil spring is avoided; reach the supplementary effect of retrieving the safety belt through motor work cooperation speed change mechanism and automatic recovery mechanism simultaneously, it is powerless to avoid the meshbelt to retrieve, the meshbelt is retrieved not in place and is retrieved the safety problem that the torsional spring became invalid and cause, simultaneously the effect that utilizes the slope locking and accelerate the locking through setting up of locking mechanism reaches required locking effect, guarantee the reliability and the stability of safety belt, slope locking through in the locking mechanism sets up and reaches the locking effect when making the coiler take place certain angle slope, guarantee the reliability of safety belt, the locking effect is reached when accelerating the locking setting in the locking mechanism simultaneously makes the meshbelt outwards move with higher speed under the effect of external force, guarantee the stability of safety belt.

Drawings

The invention will now be described, by way of example, with reference to the accompanying drawings, in which:

FIG. 1 is a schematic illustration of an explosive structure according to the present invention;

FIG. 2 is a schematic illustration of an explosive structure of the present invention;

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

FIG. 4 is a schematic perspective view of the base, worm and gear ring of the present invention;

FIG. 5 is a schematic perspective view of the reel, the transmission gear ring, the locking gear ring and the inertia block of the present invention;

FIG. 6 is a schematic perspective view of the reel, the lock ring gear and the third pawl of the present invention;

FIG. 7 is a perspective view of the reel, the second pawl and the shaft of the present invention;

FIG. 8 is a schematic perspective view of the present invention;

fig. 9 is a schematic perspective view of the present invention.

In the figure: 1. a motor; 2. a base; 3. mounting a plate; 4. a gasket; 5. a driving gear; 6. a driven gear; 7. a worm; 8. a transmission gear ring; 9. mounting grooves; 10. a bottom case; 101. a drive column block; 11. a clockwork spring; 12. a retractor bracket; 13. a winding wheel; 14. a rotating shaft; 15. a drive backing ring; 16. a limiting baffle plate; 17. a first pawl; 18. an auxiliary pad; 19. a second pawl; 20. a limiting rod; 21. an inner gear ring; 22. a steel ball placing frame; 23. steel balls; 24. a lever; 25. locking the gear ring; 26. a third pawl; 27. an inertial mass; 28. auxiliary locking end covers; 29. a top shell; 30. a positioning column; 31. and a signal line.

Detailed Description

Any feature disclosed in this specification may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be configured in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the invention, it is to be noted that, unless otherwise expressly specified or limited, the terms "mounted", "provided", "connected", and the like are to be construed broadly, such as "connected", which may be fixedly connected, welded, riveted, bonded, etc., or detachably connected, screwed, keyed, pinned, etc., or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

An intelligent active pre-tightening safety belt device for a commercial vehicle, as shown in fig. 1-9, comprises a base 2, and further comprises a speed change mechanism, a retractor component, an automatic recovery mechanism and a locking mechanism, wherein a motor 1 is arranged on the base 2, the motor 1 is connected with the base 2 through a mounting plate 3, the speed change mechanism is arranged on the base 2, an output end of the motor 1 is in transmission connection with an input end of the speed change mechanism, the retractor component is arranged above the base 2, an output end of the speed change mechanism is connected with the retractor component, the lower part of the base 2 is connected with the automatic recovery mechanism through a gasket 4, the automatic recovery mechanism is connected with the bottom end of the retractor component, the locking mechanism is arranged above the retractor component and is connected with the retractor component through a retractor bracket 12. Speed change mechanism includes driving gear 5, driven gear 6, worm 7 and transmission ring gear 8, driving gear 5 set up in on the 1 output of motor, the other perpendicular meshing of 5 one ends of driving gear driven

gear

6, 6 covers of driven gear are located 7 of worm serve, worm 7 is kept away from 6 one end of driven gear with the external tooth meshing of transmission ring gear 8, driving gear 5 driven gear 6 worm 7 with transmission ring gear 8 all sets up in mounting groove 9, mounting groove 9 sets up in base 2, driving gear 5 constitutes with 6 cooperations of driven gear the input of speed change mechanism with 1 output transmission of motor is connected, worm 7 with 8 cooperation of transmission ring gear constitutes speed change mechanism's output with the coiler subassembly is connected. The retractor assembly comprises a retractor support 12, a rolling wheel 13, a rotating shaft 14, a transmission bottom ring 15, a limiting blocking piece 16, a first pawl 17, a second pawl 19 and an auxiliary gasket 18, the retractor support 12 is connected with the base 2 through a locking bolt, the rolling wheel 13 is arranged in the retractor support 12, an inner gear ring 21 is arranged outside the top end of the rolling wheel 13, the inner gear ring 21 is arranged in the top end of the retractor support 12, the rotating shaft 14 is arranged in the rolling wheel 13, the bottom end of the rotating shaft 14 is connected with the transmission column block 101, the transmission bottom ring 15 is arranged outside the bottom end of the rotating shaft 14, the transmission bottom ring 15 is connected with the bottom end of the rolling wheel 13, the inner wall of the transmission bottom ring 15 is provided with inner teeth, the transmission bottom ring 15 is internally provided with the rotating shaft 14 as a plurality of circle center circumference uniformly distributed with the limiting blocking pieces 16, and the limiting blocking piece 16 is arranged into an outer ring limiting blocking piece group and an inner ring limiting blocking piece group, the two groups of first pawls 17 are symmetrically arranged in the transmission bottom ring 15 in a left-right mode by taking the rotating shaft 14 as a symmetric center, the first pawls 17 are arranged between the limiting blocking pieces 16, the second pawls 19 are arranged in the top end of the winding wheel 13, the second pawls 19 are movably arranged in limiting grooves, the limiting grooves are formed in the top end of the winding wheel 13, limiting rods 20 are arranged at the top ends of the second pawls 19, the auxiliary gaskets 18 are sleeved outside the top end of the rotating shaft 14, and one ends of the second pawls 19 are meshed with the inner gear ring 21. A limiting sliding groove is formed in the transmission gear ring 8 and connected with the first pawl 17, and the auxiliary gasket 18 is arranged at the top end of the winding wheel 13. The locking mechanism comprises a steel ball 23, a lever 24, a locking gear ring 25, a third pawl 26, an inertia block 27, an auxiliary locking end cover 28 and a top shell 29, the top end of the retractor support 12 is provided with the steel ball placing frame 22, the steel ball placing frame 22 is internally provided with the steel ball 23, the steel ball placing frame 22 is hinged with the lever 24, the lever 24 is arranged beside one end of the steel ball 23, the lever 24 is far away from the steel ball placing frame 22 and is arranged beside one end of the locking gear ring 25, the outer ring surface of the locking gear ring 25 is provided with an outer tooth, the locking gear ring 25 is sleeved on the rotating shaft 14, a positioning column 30 is arranged in the locking gear ring 25, the positioning column 30 is movably connected with the third pawl 26, the inertia block 27 is arranged at the upper end of the third pawl 26, the inertia block 27 is arranged in the locking gear ring 25, the auxiliary locking end cover 28 is sleeved on the locking gear ring 25, an inner gear ring is arranged in the auxiliary locking end cover 28 and meshed with the third pawl 26, the top shell 29 is sleeved outside the auxiliary locking end cover 28, and the top shell 29 is connected with the retractor support 12 through a locking bolt. The auxiliary gasket 18 set up in locking ring gear 25 with between the take-up pulley 13, set up the spacing groove in the locking ring gear 25, the spacing inslot sets up gag lever post 20, automatic recovery mechanism the coiler subassembly with locking mechanism is on same central line, 1 one end electric connection signal line 31 of motor, the safety belt is established to the outer winding cover of take-up pulley 13. Automatic retrieve mechanism includes drain pan 10, clockwork spring 11, gasket 4 and transmission column piece 101, set up in the drain pan 10 clockwork spring 11, clockwork spring 11 center department one end with transmission column piece 101 is connected, clockwork spring 11 outer lane end with drain pan 10 is connected, transmission column piece 101 overcoat is established gasket 4, gasket 4 set up in clockwork spring 11 with between the base 2, drain pan 10 through locking bolt with 2 bottoms of base are connected. A plurality of limit stops are uniformly distributed on the outer ring of the bottom end of the inertia block 27 and in the locking gear ring 25 beside one end of the third pawl 26. One end of the third pawl 26 is arranged to be a meshing locking end to be meshed with an inner gear ring in the auxiliary locking end cover 28, and the third pawl 26 is far away from the meshing locking end and is connected with the limiting block of the locking gear ring 25 through a return spring. The second pawl 19 is matched with the inner gear ring 21, the first pawl 17 is matched with the inner gear of the transmission bottom ring 15, the lever 24 is matched with the outer gear of the locking gear ring 25, and the third pawl 26 is matched with the inner gear ring of the auxiliary locking end cover 28 to achieve the meshing locking effect. The motor 1 drives the driving gear 5 in the speed change mechanism to be rotationally matched with the driven gear 6 to drive the worm 7 to rotate, so that force is transmitted to the transmission gear ring 8 in the retractor assembly, the transmission gear ring 8 rotates to drive the first pawl 17 to movably engage with the inner teeth of the transmission bottom ring 15, and the winding wheel 13 is driven to rotate to achieve the safety belt tightening effect. The steel ball 28 activity set up in the frame 22 is placed to the steel ball, when the coiler support 12 when below 28 degrees of arbitrary direction slope at the mounted position the steel ball 28 can't be followed fall out in the frame 22 is placed to the steel ball, when inclination is greater than 28 degrees, the steel ball 28 follow fall out in the frame 22 is placed to the steel ball to drive lever 24 rotary motion to the locking ring gear 25 external tooth circle meshing locking, and then reach the effect of locking rolling wheel 13.

The working principle of the specific embodiment is as follows: when the safety belt is pulled out, the clockwork spring 11 tightens up and stores elastic potential energy; when the safety belt is unlocked, the elastic potential energy of the clockwork spring 11 is released to recover the safety belt, the motor 1 works during the recovery of the woven belt and rotates through the driving gear 5, the driven gear drives the driven gear 6 to rotate through meshing, so that the worm 7 is driven to rotate, the force is transmitted to the transmission gear ring 8 in the retractor assembly, the transmission gear ring 8 rotates to drive the first pawl 17 to movably mesh with the inner teeth of the transmission bottom ring 15, and the winding wheel 13 is driven to rotate to achieve the effect that the winding wheel 13 assists in recovering the safety belt;

when the retractor assembly inclines at a certain angle and inclines by more than 28 degrees, the steel balls 23 slide outwards to drive the lever 24 to lock the outer tooth circle of the locking gear ring 25, so that the locking gear ring 25 cannot rotate, then the safety belt drives the winding wheel 13 to be pulled outwards, and at the moment, the limiting rod 20 on the second pawl 19 moves to the limit position in the limiting groove in the locking gear ring 25, so that the second pawl 19 slides outwards in the winding wheel groove at the top end of the winding wheel 13 to be meshed with and locked with the inner gear ring 21 of the retractor bracket 12, and the effect of inclined locking is achieved;

when external force acts on the safety belt, the safety belt moves outwards, and the acceleration is greater than 2.0g, the inertia block 27 is kept in an original state, the third pawl 26 moves outwards to clamp an inner gear circle of the auxiliary locking end cover 28, so that the locking gear ring 25 cannot rotate, then the safety belt drives the winding wheel 13 to pull out outwards, at the moment, the limiting rod 20 on the second pawl 19 moves to a limit position in a limiting groove in the locking gear ring 25, so that the second pawl 19 slides outwards in a winding wheel groove at the top end of the winding wheel 13 to be meshed and locked with the inner gear ring 21 of the retractor bracket 12, and the effect of accelerating locking is achieved;

when a vehicle deviates from a lane or collides during running, a signal is transmitted to the controller through the vehicle control system, the motor 1 starts to work after receiving an instruction signal sent by the controller, and the motor 1 drives the speed change mechanism and the automatic recovery mechanism to quickly tighten the safety belt, so that the safety of a driver and passengers can be protected by quickly pre-tightening before a human body feels the collision;

when the safety belt is used, and the lock catch is locked or unlocked, the motor 1 starts to work after receiving a command signal sent by a vehicle control system, the motor 1 drives the speed change mechanism and the automatic recovery mechanism to quickly tighten the safety belt, and the safety problem caused by the fact that the woven belt is not recovered in place or the recovery coil spring is invalid is avoided.

The invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed.

Claims

1. An intelligent active pre-tightening safety belt device for a commercial vehicle, comprising a base (2), characterized in that: still include speed change mechanism, coiler subassembly, automatic recovery mechanism and locking mechanism, set up motor (1) on base (2), motor (1) through mounting panel (3) with base (2) are connected, speed change mechanism set up in on base (2), motor (1) output is connected with the transmission of speed change mechanism input, the coiler subassembly set up in base (2) top, the speed change mechanism output is connected with the coiler subassembly, base (2) below is connected with automatic recovery mechanism through setting up gasket (4), automatic recovery mechanism with coiler subassembly bottom is connected, coiler subassembly top sets up locking mechanism, locking mechanism pass through coiler support (12) with the coiler subassembly is connected.

2. An intelligent active pretensioned seatbelt apparatus for a commercial vehicle according to claim 1 wherein: the speed change mechanism comprises a driving gear (5), a driven gear (6), a worm (7) and a transmission gear ring (8), wherein the driving gear (5) is sleeved on an output shaft of the motor (1), one end of the driving gear (5) is perpendicularly meshed with the driven gear (6), the driven gear (6) is sleeved on one end of the worm (7), the worm (7) is far away from one end of the driven gear (6) and is meshed with outer teeth of the transmission gear ring (8), the driving gear (5), the driven gear (6), the worm (7) and the transmission gear ring (8) are arranged in a mounting groove (9), the mounting groove (9) is arranged in the base (2), the driving gear (5) and the driven gear (6) are matched to form an input end of the speed change mechanism and are in transmission connection with an output end of the motor (1), the worm (7) and the transmission gear ring (8) are matched to form the output end of the speed change mechanism and the retractor component are connected.

3. An intelligent active pretensioned seatbelt apparatus for a commercial vehicle according to claim 2 wherein: the retractor component comprises a retractor support (12), a rolling wheel (13), a rotating shaft (14), a transmission bottom ring (15), a limiting blocking piece (16), a first pawl (17), a second pawl (19) and an auxiliary gasket (18), the retractor support (12) is connected with the base (2) through a locking bolt, the rolling wheel (13) is arranged in the retractor support (12), a ring gear (21) is arranged outside the top end of the rolling wheel (13), the ring gear (21) is arranged in the top end of the retractor support (12), the rotating shaft (14) is arranged in the rolling wheel (13), the bottom end of the rotating shaft (14) is connected with the transmission column block (101), the transmission bottom ring (15) is arranged outside the bottom end of the rotating shaft (14), the transmission bottom ring (15) is connected with the bottom end of the rolling wheel (13), and internal teeth are arranged on the inner wall of the transmission bottom ring (15), a plurality of limiting baffle sheets (16) are uniformly distributed in the transmission bottom ring (15) by taking the rotating shaft (14) as the circle center, the limiting blocking pieces (16) are arranged into an outer ring limiting blocking piece group and an inner ring limiting blocking piece group, two groups of first pawls (17) are arranged in the transmission bottom ring (15) in a left-right symmetrical mode by taking the rotating shaft (14) as a symmetrical center, the first pawl (17) is arranged between the limiting blocking pieces (16), the second pawl (19) is arranged in the top end of the winding wheel (13), the second pawl (19) is movably arranged in a limit groove, the limit groove is internally arranged in the top end of the winding wheel (13), the top end of the second pawl (19) is provided with a limiting rod (20), the auxiliary gasket (18) is sleeved on the top end of the rotating shaft (14), and one end of the second pawl (19) is meshed with the inner gear ring (21).

4. An intelligent active pre-tightening safety belt device for commercial vehicles according to claim 3, characterized in that a limiting sliding groove is formed in the transmission gear ring (8), the limiting sliding groove is connected with the first pawl (17), and the auxiliary gasket (18) is arranged at the top end of the rolling wheel (13).

5. An intelligent active pretensioned seatbelt apparatus for a commercial vehicle according to any of claim 4, wherein: the locking mechanism comprises a steel ball (23), a lever (24), a locking gear ring (25), a third pawl (26), an inertia block (27), an auxiliary locking end cover (28) and a top shell (29), the top end of the retractor support (12) is provided with the steel ball to place the frame (22), the steel ball is placed in the frame (22) to be provided with the steel ball (23), the steel ball is placed on the frame (22) to be hinged to the lever (24), the lever (24) is arranged beside one end of the steel ball (23), the lever (24) is far away from the steel ball to place the frame (22) to be arranged beside one end of the locking gear ring (25), the outer surface of the outer ring of the locking gear ring (25) is provided with outer teeth, the locking gear ring (25) is sleeved on the rotating shaft (14), a positioning column (30) is arranged in the locking gear ring (25), and the positioning column (30) is movably connected with the third pawl (26), third pawl (26) upper end sets up inertia piece (27), inertia piece (27) set up in locking ring gear (25), locking ring gear (25) overcoat is established supplementary locking end cover (28), set up the ring gear in supplementary locking end cover (28) with third pawl (26) meshing, supplementary locking end cover (28) overcoat is established top shell (29), top shell (29) through the locking bolt with coiler support (12) are connected.

6. An intelligent active pre-tensioned seatbelt apparatus for a commercial vehicle according to claim 5, wherein: auxiliary gasket (18) set up in locking ring gear (25) with between take-up pulley (13), set up the spacing groove in locking ring gear (25), the spacing inslot sets up gag lever post (20), retrieve the mechanism automatically the coiler subassembly with locking mechanism is on same central line, motor (1) one end electric connection signal line (31), the safety belt is established to take-up pulley (13) outer winding cover.

7. An intelligent active pretensioned seatbelt apparatus for a commercial vehicle according to any of claims 1-6, wherein: automatic retrieve mechanism includes drain pan (10), clockwork spring (11), gasket (4) and transmission column piece (101), set up in drain pan (10) clockwork spring (11), clockwork spring (11) center department one end with transmission column piece (101) are connected, clockwork spring (11) outer lane end with drain pan (10) are connected, transmission column piece (101) overcoat is established gasket (4), gasket (4) set up in clockwork spring (11) with between base (2), drain pan (10) through locking bolt with base (2) bottom is connected.