CN214396679U - Safety belt pre-tightening device, safety belt assembly and automobile - Google Patents
Safety belt pre-tightening device, safety belt assembly and automobile Download PDFInfo
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- CN214396679U CN214396679U CN202022318343.6U CN202022318343U CN214396679U CN 214396679 U CN214396679 U CN 214396679U CN 202022318343 U CN202022318343 U CN 202022318343U CN 214396679 U CN214396679 U CN 214396679U
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Abstract
The utility model discloses a safety belt preloading device, safety belt assembly and car relates to safety belt technical field, include: one end of the air chamber is provided with an operation hole, and a sealing element is detachably arranged in the operation hole; the driving assembly is detachably arranged in the air chamber; one end of the piston cylinder is communicated with the air chamber, and the other end of the piston cylinder is open; the impact block is arranged in one end of the piston cylinder and is in sliding fit with the piston cylinder; the rack is arranged in the other end of the piston cylinder in a sliding mode and is in sliding fit with the piston cylinder; the driving assembly can drive the impact block to move towards the other end of the piston cylinder, and further pushes the rack to move towards the other end of the piston cylinder; the safety belt pre-tightening device with the detachable driving assembly is adopted to replace a black box, and the safety belt pre-tightening device can be reused after the driving assembly is replaced, so that the use cost of the automobile is reduced.
Description
Technical Field
The utility model belongs to the technical field of the safety belt, more specifically relates to a safety belt preloading device, safety belt assembly and car.
Background
In a safety system of a motor vehicle, a safety belt and its accessories are the core safety components, wherein the pretensioning device of the belt retractor is the main component for protecting the occupant. The safety belt on the market basically adopts disposable black box as preloading device, and when the car bumps, collision sensor receives collision signal after, black box spare starts and tightens up the safety belt, reduces passenger's displacement volume, alleviates personnel's injury. However, the black box element after starting cannot be reused, the whole pretensioning device must be replaced, and the cost for replacing the black box element is high, thereby increasing the use cost of the automobile.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a safety belt preloading device, safety belt assembly and car to exist not enough among the prior art, adopt the safety belt preloading device who has detachable drive assembly to replace black box, can used repeatedly after this safety belt preloading device changes drive assembly, reduced the use cost of car.
In order to achieve the above object, the utility model provides a safety belt preloading device, include:
one end of the air chamber is provided with an operation hole, and a sealing element is detachably arranged in the operation hole;
the driving assembly is detachably arranged in the air chamber;
one end of the piston cylinder is communicated with the air chamber, and the other end of the piston cylinder is open;
the impact block is arranged in one end of the piston cylinder and is in sliding fit with the piston cylinder;
the rack is arranged in the other end of the piston cylinder in a sliding mode and is in sliding fit with the piston cylinder;
the driving assembly can drive the impact block to move towards the other end of the piston cylinder, and then the rack is pushed to move towards the other end of the piston cylinder. Optionally, a partition plate is arranged in the air chamber, the partition plate divides the air chamber into an expansion chamber and an operation chamber, and a hole is formed in the partition plate.
Optionally, the driving assembly comprises a powder portion disposed through the hole in the expansion chamber and an ignition portion disposed in the operating chamber.
Optionally, the ignition device further comprises a signal wire, one end of the signal wire is connected with the ignition part, and the signal wire is used for transmitting an ignition signal.
Optionally, a first groove is formed in the inner wall of one end of the piston cylinder, a second groove is formed in the outer wall of the impact block, the first groove and the second groove are matched to enable the first groove and the second groove to accommodate a steel ball, the steel ball is embedded between the first groove and the second groove, and the impact block can be limited to slide in the piston cylinder.
Optionally, a sliding groove is formed in the inner wall of the other end of the piston cylinder, a convex block is arranged in the sliding groove in a sliding mode, and a spring is arranged between the convex block and the bottom of the sliding groove; the rack is provided with a guide groove in sliding fit with the convex block, the bottom of the guide groove is provided with a positioning groove, and the convex block can be inserted into the positioning groove under the elastic action of the spring.
Optionally, a tapered groove is further formed in the groove bottom of the guide groove, the tapered groove is in a tapered shape with a large outer end and a small inner end, and the tapered groove is matched with the projection. Optionally, the operation hole is opened on the outer wall of the operation chamber, the operation hole includes a smooth hole portion and a threaded hole portion, the smooth hole portion is arranged at one end close to the operation chamber, the sealing element includes a sealing gasket and a sealing bolt, the sealing gasket is arranged in the smooth hole portion, and the sealing bolt is arranged in the threaded hole portion.
The utility model also provides a safety belt, include:
the above-described seatbelt pretensioner;
a seat belt;
the retractor is used for retracting the safety belt, and gear teeth matched with the rack are arranged on the periphery of the outer end of a driving shaft of the retractor;
and the collision sensor is electrically connected with the driving assembly.
The utility model also provides a car, including foretell safety belt assembly.
The utility model provides a safety belt preloading device, safety belt assembly and car, its beneficial effect lies in:
1. the pre-tightening device adopts the detachable driving assembly, so that only the driving assembly needs to be replaced after the pre-tightening device tightens the safety belt during the collision of the automobile, the whole pre-tightening device does not need to be replaced, the maintenance operation is simple and convenient, and the use cost of the automobile is reduced;
2. one end of a piston cylinder of the pre-tightening device limits the impact block through the first groove, the second groove and the steel ball, the impact block breaks through the limit by using gas impact generated after gunpowder is ignited, the structure is simple, the limit is stable, and the manufacturing cost of the pre-tightening device is reduced;
3. the elastic structure formed by the sliding groove, the spring and the bump arranged on the piston cylinder is matched with the positioning groove and the tapered groove on the rack to realize initial positioning of the rack and pre-tightening positioning after collision and pre-tightening, so that the reliability of the position of the rack when the whole automobile runs and the maintenance of the pre-tightened safety belt after collision are ensured, and the using effect of the safety belt pre-tightening device is improved.
Other features and advantages of the present invention will be described in detail in the detailed description which follows.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout the exemplary embodiments of the present invention.
Fig. 1 shows a schematic structural diagram of a seat belt pretensioner according to an embodiment of the present invention.
Fig. 2 shows an exploded view of a seat belt assembly according to an embodiment of the present invention.
Fig. 3 shows a schematic structural diagram of a seat belt assembly according to an embodiment of the present invention.
Fig. 4 shows a schematic view of the operating principle of a safety belt assembly according to an embodiment of the present invention.
Fig. 5 shows a schematic cross-sectional view of a seat belt assembly according to an embodiment of the present invention.
Fig. 6 shows a schematic view of the engagement of the striking block and the piston cylinder of a seat belt pretensioner according to an embodiment of the present invention.
Fig. 7 shows a schematic structural diagram of an air chamber of a seat belt pretensioner according to an embodiment of the present invention.
Fig. 8 shows a schematic diagram of an internal structure of a piston cylinder of a seat belt pretensioner according to an embodiment of the present invention.
Description of reference numerals:
1. a seat belt pretensioning device; 2. an air chamber; 3. an operation hole; 4. a seal member; 5. a drive assembly; 6. a piston cylinder; 7. an impact block; 8. a rack; 9. a partition plate; 10. an expansion chamber; 11. an operation chamber; 12. a guide groove; 13. a gunpowder section; 14. an ignition section; 15. a signal line; 16. a first groove; 17. a second groove; 18. a steel ball; 19. a collision sensor; 20. a drive shaft; 21. a sliding groove; 22. a bump; 23. positioning a groove; 24. a light aperture portion; 25. a threaded hole portion; 26. and (4) a retractor.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The utility model provides a safety belt preloading device, include:
one end of the air chamber is provided with an operation hole, and a sealing piece is detachably arranged in the operation hole;
the driving assembly is detachably arranged in the air chamber;
one end of the piston cylinder is communicated with the air chamber, and the other end of the piston cylinder is open;
the impact block is arranged in one end of the piston cylinder and is in sliding fit with the piston cylinder;
the rack is arranged in the other end of the piston cylinder in a sliding manner and is in sliding fit with the piston cylinder;
the driving assembly can drive the impact block to move towards the other end of the piston cylinder, and then the rack is pushed to move towards the other end of the piston cylinder.
Specifically, the safety belt pre-tightening device is provided with an air chamber, one end of the air chamber is provided with an operation hole, a detachable sealing element is arranged in the operation hole, a driving assembly in the air chamber can be replaced by detaching the sealing element, the air chamber is also communicated with one end of a piston cylinder, an impact block is arranged at one end, close to the air chamber, in the piston cylinder, and a rack is arranged at one end, far away from the air chamber, in the piston cylinder; when the driving assembly obtains a signal, the driving assembly promotes the gas in the gas chamber to rapidly expand, the gas enters the piston cylinder after being filled in the gas chamber, and pushes the impact block in the piston cylinder to move in the direction far away from the gas chamber, and the pushed impact block is contacted with the rack in the piston cylinder and pushes the rack to slide together in the direction far away from the gas chamber; the sliding of the rack can be matched with the gear teeth on the input shaft of the retractor to drive the retractor to retract, so that the safety belt is pre-tightened.
Optionally, a partition is arranged in the air chamber, the partition divides the air chamber into an expansion chamber and an operation chamber, and a hole is formed in the partition.
Specifically, the partition plate is arranged in the air chamber, the expansion chamber is smaller than the air chamber, the air can more easily fill the space of the whole expansion chamber in a short time, the pressure of the generated air in the small space is higher, and the thrust with high speed and high stress can be generated to push the impact block, so that the displacement of a passenger is limited at a high speed in the automobile collision, and the injury degree of the passenger is reduced; when the gas in the expansion chamber expands, the partition board blocks the expanded gas from entering the operation chamber, so that the integrity of the signal wire and the sealing element in the operation chamber is prevented from being influenced, and the signal wire and the sealing element are protected.
Alternatively, the driving assembly includes a powder portion penetrating the expansion chamber and an ignition portion provided in the operation chamber.
Specifically, the powder part is arranged in the expansion chamber, and the powder part is started in a smaller space, so that the gas expansion speed can be increased; the ignition part is arranged in the operation chamber, so that the ignition part cannot be damaged when the gunpowder part is started, and the cost for replacing the driving assembly is reduced; the expansion chamber provided with the gunpowder part and the operation chamber provided with the starting part are made of different materials, the materials for forming the expansion chamber need to resist high temperature and high pressure, the materials for forming the operation chamber need to be low, different materials can be selected according to different use requirements, and the production cost of the safety belt pre-tightening device is effectively reduced.
In another example, the drive assembly may also be a gas one-way generator.
Specifically, a gas output port of the gas one-way generator is connected with a hole formed in the partition plate, gas generated by the gas one-way generator directly enters the expansion chamber, and a control unit of the gas one-way generator is arranged in the operation chamber.
Optionally, the ignition device further comprises a signal wire, one end of the signal wire is connected with the ignition part, and the signal wire is used for transmitting an ignition signal.
Specifically, the signal line is used for transmitting an ignition signal, the signal line is stable in transmission, small in interference from the outside, simple in connection and capable of reducing the production cost of the safety belt pre-tightening device.
In another example, the ignition signal may also be communicated through the communication module.
Specifically, a signal receiver may be installed in the ignition portion, and the ignition command may be transmitted by a wireless signal.
Optionally, a first groove is formed in the inner wall of one end of the piston cylinder, a second groove is formed in the outer wall of the impact block, the first groove and the second groove are matched to enable the steel ball to be contained between the first groove and the second groove, the steel ball is embedded between the first groove and the second groove, and sliding of the impact block in the piston cylinder can be limited.
Specifically, the first groove and the second groove are one deep and one shallow, when the powder part is ignited in the expansion chamber, and after the expansion chamber is filled with gas, the gas applies pressure to the impact block, so that the steel ball can forcibly break through the limit of the shallow groove to move towards the rack, and the rack is further pushed.
Optionally, a sliding groove is formed in the inner wall of the other end of the piston cylinder, a convex block is arranged in the sliding groove in a sliding mode, and a spring is arranged between the convex block and the bottom of the sliding groove; the rack is provided with a guide groove in sliding fit with the convex block, the bottom of the guide groove is provided with a positioning groove, and the convex block can be inserted into the positioning groove under the elastic action of the spring.
Specifically, the convex block can be just inserted into the positioning groove under the elastic force action of the bottom spring to form the self-locking of the rack; when the striking block pushes the rack to move to the position far away from the air chamber, the convex block popped up by the spring is just inserted into the positioning groove at the bottom of the rack guide groove, the rack is locked, and the pre-tightening state of the safety belt is kept.
Optionally, a tapered groove is further formed in the bottom of the guide groove, the tapered groove is tapered with a large outer end and a small inner end, and the tapered groove is matched with the projection.
Specifically, the cooperation of taper groove and lug can realize the location of rack on initial position, and during initial condition, the lug inserts the taper inslot, avoids the slip of rack in the piston cylinder, and when striking piece promoted the rack, because the cell wall of taper groove is the taper, the cell wall of taper groove can promote the lug and move to compression spring's direction, and then the initial positioning state of unblock rack.
Optionally, the operation hole is opened on the outer wall of the operation chamber, the operation hole includes a smooth hole portion and a threaded hole portion, the smooth hole portion is disposed at one end close to the operation chamber, the sealing member includes a sealing gasket and a sealing bolt, the sealing gasket is disposed in the smooth hole portion, and the sealing bolt is disposed in the threaded hole portion.
Specifically, the operation hole is formed in the outer wall of the operation chamber, a smooth hole part is formed in one end, close to the operation chamber, of the operation hole, a sealing gasket is arranged in the smooth hole part, the sealing gasket can further guarantee that expansion gas in the air chamber is not released to the outside of the air chamber, guarantee that the expansion gas can push the impact block and the rack to move to achieve pre-tightening of the safety belt, and avoid the expansion gas from diffusing into the cab to affect the comfort of a passenger; meanwhile, the structure is convenient to disassemble and convenient for replacing the driving assembly.
The utility model also provides a safety belt, include:
the above-described seatbelt pretensioner;
a seat belt;
the retractor is used for retracting the safety belt, and gear teeth matched with the rack are arranged on the periphery of the outer end of a driving shaft of the retractor;
and the collision sensor is electrically connected with the driving assembly.
Specifically, collision sensor when receiving collision signal, gives safety belt preloading device with safety belt pretension instruction transmission, and safety belt preloading device passes through drive assembly and produces high-pressure gas in the air chamber, promotes the striking piece and then promotes the rack and remove, through the meshing transmission of rack and the teeth of a cogwheel, drives the drive shaft rotation of coiler, realizes the pretension roll-up of safety belt, reduces the passenger displacement volume, reduces the injury degree of passenger in the collision.
The utility model also provides a car, including foretell safety belt assembly.
Examples
As shown in fig. 1 to 8, the present invention provides a seat belt pretensioner 1, including:
one end of the air chamber 2 is provided with an operation hole 3, and a sealing element 4 is detachably arranged in the operation hole 3;
the driving assembly 5 is detachably arranged in the air chamber 2;
one end of the piston cylinder 6 is communicated with the air chamber 2, and the other end is open;
the impact block 7 is arranged in one end of the piston cylinder 6;
the rack 8 is arranged in the other end of the piston cylinder 6 in a sliding mode and is in sliding fit with the piston cylinder 6;
the driving assembly 5 can drive the impact block 7 to move towards the other end of the piston cylinder 6, and further push the rack to move towards the other end of the piston cylinder 6.
In this embodiment, a partition 9 is provided in the gas chamber 2, and the partition 9 divides the gas chamber 2 into an expansion chamber 10 and an operation chamber 11, and the partition is provided with a hole.
In the present embodiment, the driving assembly 5 includes the explosive portion 13 and the ignition portion 14, the explosive portion 13 is disposed through the hole in the expansion chamber 10, and the ignition portion 14 is disposed in the operation chamber 11.
In the present embodiment, a signal line 15 is further included, one end of which is connected to the ignition portion 14, and the signal line 15 is used for transmitting an ignition signal.
In this embodiment, a first groove 16 is formed in the inner wall of one end of the piston cylinder 6, a second groove 17 is formed in the outer wall of the impact block 7, the first groove 16 and the second groove 17 are matched to enable a steel ball 18 to be contained between the first groove 16 and the second groove 17, and the steel ball 18 is embedded between the first groove 16 and the second groove 17 to limit the sliding of the impact block 7 in the piston cylinder 6.
In this embodiment, a sliding groove 21 is provided on the inner wall of the other end 20 of the piston cylinder 6, a protrusion 22 is slidably provided in the sliding groove 21, and a spring is provided between the protrusion 22 and the bottom of the sliding groove 21; the rack 8 is provided with a guide groove 12 in sliding fit with the projection 22, the bottom of the guide groove 12 is provided with a positioning groove 23, and the projection 22 can be inserted into the positioning groove 23 under the elastic force of the spring.
In this embodiment, the bottom of the guiding groove 12 is further provided with a tapered groove, which has a larger outer end and a smaller inner end, and is engaged with the protrusion 22.
In this embodiment, the operation hole 3 is opened on the outer wall of the operation chamber 11, the operation hole 3 includes a smooth hole portion 24 and a threaded hole portion 25, the smooth hole portion 24 is disposed at one end close to the operation chamber 11, the sealing member 4 includes a sealing pad and a sealing bolt, the sealing pad is disposed in the smooth hole portion 24, and the sealing bolt is disposed in the threaded hole portion 25.
The utility model also provides a safety belt, include:
the above-described seatbelt pretensioner 1;
a seat belt;
a retractor 26 for retracting the seat belt, wherein gear teeth matched with the rack 8 are arranged on the outer periphery of the outer end of the driving shaft 20 of the retractor 26;
and the collision sensor 19 is electrically connected with the driving assembly 5.
The utility model also provides a car, including foretell safety belt assembly.
To sum up, the utility model provides a safety belt preloading device 1 is when the safety belt assembly uses, if the car bumps, collision sensor 19 detects the collision signal, and transmit the collision signal to ignition portion 14 as ignition signal through signal line 15, ignition portion 14 receives and ignites powder portion 13 after the ignition signal, the gas rapid expansion of inflation room 10, expanding gas promotes striking block 7 and removes, striking block 7 pushes rack 8 to retractor 26's drive shaft 20, drive shaft 20 through rack 8 and the meshing drive belt of the teeth of a cogwheel moves retractor 26 rotates, and then the roll-up safety belt, realize the pretension of safety belt, thereby reduce passenger's displacement, reduce the injury degree of passenger in the collision. After the collision, the driving assembly 5 cannot be used again, and the driving assembly 5 can be replaced by removing the sealing member 4 on the side of the air chamber 2 to open the operation hole 3, so that the function of the seat belt pretensioner 1 is restored, which saves the cost of using the automobile compared with the replacement of the entire seat belt pretensioner 1.
While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (10)
1. A seat belt pretensioner, comprising:
one end of the air chamber is provided with an operation hole, and a sealing element is detachably arranged in the operation hole;
the driving assembly is detachably arranged in the air chamber;
one end of the piston cylinder is communicated with the air chamber, and the other end of the piston cylinder is open;
the impact block is arranged in one end of the piston cylinder and is in sliding fit with the piston cylinder;
the rack is arranged in the other end of the piston cylinder in a sliding mode and is in sliding fit with the piston cylinder;
the driving assembly can drive the impact block to move towards the other end of the piston cylinder, and then the rack is pushed to move towards the other end of the piston cylinder.
2. The seatbelt pretensioner according to claim 1, wherein a partition is provided in the air chamber, the partition dividing the air chamber into an expansion chamber and an operation chamber, the partition having an aperture.
3. The seatbelt pretensioner of claim 2, wherein the drive assembly includes a pyrotechnic portion disposed through the aperture in the expansion chamber and an ignition portion disposed in the operating chamber.
4. The seatbelt pretensioner according to claim 3, further comprising a signal line having one end connected to the ignition portion, the signal line being configured to transmit an ignition signal.
5. The safety belt pre-tightening device according to claim 1, wherein a first groove is formed in an inner wall of the one end of the piston cylinder, a second groove is formed in an outer wall of the impact block, the first groove and the second groove are matched with each other, so that a steel ball can be accommodated between the first groove and the second groove, and the steel ball is embedded between the first groove and the second groove, so that the sliding of the impact block in the piston cylinder can be limited.
6. The seatbelt pretensioner according to claim 1, wherein a sliding groove is formed on an inner wall of the other end of the piston cylinder, a protrusion is slidably disposed in the sliding groove, and a spring is disposed between the protrusion and a groove bottom of the sliding groove; the rack is provided with a guide groove in sliding fit with the convex block, the bottom of the guide groove is provided with a positioning groove, and the convex block can be inserted into the positioning groove under the elastic action of the spring.
7. The seatbelt pretensioner according to claim 6, wherein a tapered groove having a larger outer end and a smaller inner end is further formed at a bottom of the guide groove, and the tapered groove is engaged with the protrusion.
8. The seatbelt pretensioner according to claim 2, wherein the operation hole is opened in an outer wall of the operation chamber, the operation hole includes a smooth hole portion provided near one end of the operation chamber and a threaded hole portion in which the seal is provided, and the sealing member includes a seal gasket and a seal bolt.
9. A seat belt assembly, comprising:
the seat belt pretensioner of any of claims 1 to 8;
a seat belt;
the retractor is used for retracting the safety belt, and gear teeth matched with the rack are arranged on the periphery of the outer end of a driving shaft of the retractor;
and the collision sensor is electrically connected with the driving assembly.
10. An automobile comprising the seatbelt assembly according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022318343.6U CN214396679U (en) | 2020-10-16 | 2020-10-16 | Safety belt pre-tightening device, safety belt assembly and automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022318343.6U CN214396679U (en) | 2020-10-16 | 2020-10-16 | Safety belt pre-tightening device, safety belt assembly and automobile |
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| Publication Number | Publication Date |
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| CN214396679U true CN214396679U (en) | 2021-10-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022318343.6U Active CN214396679U (en) | 2020-10-16 | 2020-10-16 | Safety belt pre-tightening device, safety belt assembly and automobile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115107693A (en) * | 2022-06-30 | 2022-09-27 | 长沙理工大学 | Safety equipment for vehicle |
-
2020
- 2020-10-16 CN CN202022318343.6U patent/CN214396679U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115107693A (en) * | 2022-06-30 | 2022-09-27 | 长沙理工大学 | Safety equipment for vehicle |
| CN115107693B (en) * | 2022-06-30 | 2023-06-02 | 长沙理工大学 | Safety equipment for vehicle |
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