CN203739818U - Telescopic energy absorption spare wheel mechanism - Google Patents

Abstract

A telescopic energy-absorbing spare tire mechanism relates to the technical fields of automobile collision safety and spare tire placement, in particular to a telescopic energy-absorbing spare tire mechanism. It includes an energy-absorbing spare tire (1), a telescopic folding mechanism (3), a spare tire mounting frame (4) and a bumper (6). The energy-absorbing spare tire (1) is provided with a safety valve (2), and the telescopic folding mechanism (3) includes a pneumatic cylinder (7), a tappet (8), a left folding arm (12), a right folding arm (14) and two longitudinal beams. The spare tire mounting frame (4) includes a sliding frame (18) and a fixed slide rail (19), and the front end of the sliding frame (18) is fixedly connected to the bumper (6) through a crushable connecting beam (21). The telescoping and folding mechanism (3) controls the sliding frame (18) to extend out of a part of the vehicle. The utility model proposes a telescopic energy-absorbing spare tire mechanism, which enables the vehicle to obtain a relatively constant buffer force during the collision process, obtains a more ideal buffer collision effect, and improves the safety protection for the driver and the vehicle.

Description

A telescopic energy-absorbing spare tire mechanism

technical field

The utility model relates to the technical field of automobile collision safety and placement of spare tires, in particular to a telescopic energy-absorbing spare tire mechanism.

Background technique

With the improvement of people's living standards in our country and the development of the automobile industry, automobiles have become an important means of transportation for people's daily travel, and the number of traffic accidents and casualties have also increased significantly. Due to the influence of factors such as the driver himself, the road environment, the climate and the state of automobile technology, traffic accidents cannot be completely avoided. According to statistics, frontal collision accidents accounted for 67% of the total. Therefore, how to maximize the safety of personnel during frontal collisions and reduce the losses caused by accidents is of great significance. However, the energy-absorbing space at the front of the current passenger cars, trucks and other vehicles is relatively small, and it is easy to cause damage to the driver and passengers during a collision, and the spare tire at the lower part of the front of the car has not been fully utilized during the collision.

Chinese patent application number 201220204283.8 discloses a telescopic automobile bumper, in which the telescopic folding mechanism can well realize the shrinkage of the bumper, but the telescopic folding mechanism is driven by two pneumatic cylinders, which takes up a lot of space and power .

Most vehicles use traditional hanging spare tire racks, which take up a lot of space. This method cannot be used for vehicles with limited frame height space, such as double-decker road buses.

For the above problems now, the utility model proposes a telescopic energy-absorbing spare tire mechanism.

Utility model content

The utility model proposes a telescopic energy-absorbing spare tire mechanism, which enables the vehicle to obtain a relatively constant buffer force during the collision process, obtains a more ideal buffer collision effect, and improves the safety protection for the driver and the vehicle.

In conjunction with the accompanying drawings, the specific description is as follows:

A telescopic energy-absorbing spare tire mechanism, comprising an energy-absorbing spare tire 1, a telescopic folding mechanism 3, a spare tire mounting frame 4 and a bumper 6;

Described telescopic folding mechanism 3 comprises pneumatic cylinder 7, tappet 8, left folding arm 12, right folding arm 14 and two longitudinal beams; Described tappet 8 is provided with sliding sleeve 16, and sliding sleeve 16 is connected with tappet. 8 Clearance fit, the left and right folding arms 12, 14 are connected with the sliding sleeve 16 through the bolt 15 for the hinged hole, the bolt 15 for the hinged hole is threaded with the sliding sleeve 16, and hinged with the left and right folding arms 12, 14 The two longitudinal beams are respectively composed of a fixed section 9, a front folding section 11 and a rear folding section 10, and the other ends of the left and right folding arms 12, 14 are respectively connected with the front and rear folding sections 11, 10 are hinged, and the fixed section 9 is fixed on the chassis;

An unlocking block 17 is arranged on the tappet 8, the length of the unlocking block 17 from the outer end of the tappet 8 is L ₁ , the length of the front folding section (11) is a, L ₁ ≤ a;

The energy-absorbing spare tire 1 is provided with a safety valve 2, and the safety valve 2 is set to maintain the pressure in the energy-absorbing spare tire 1 as 90% to 95% of the ultimate pressure of the energy-absorbing spare tire 1 blowout;

The spare tire mounting frame 4 includes a sliding frame 18 and a fixed slide rail 19, the fixed sliding rail 19 is fixed on the chassis, the front end of the sliding frame 18 is fixedly connected to the bumper 6 through a crushable connecting beam 21, and the telescopic The folding mechanism 3 is hinged with the sliding frame 18 through the front folding section 11, and the sliding frame 18 is controlled to extend out of a part of the vehicle.

Described fixed slide rail 19 is fixedly installed on the chassis by mounting block 20, and three rollers 25 are respectively equipped with on both sides of described sliding frame 18, and roller 25 and fixed slide rail 19 roll and cooperate, realize moving back and forth.

The crushable connecting beam 21 is a square thin tube profile, which is segmented and stepped, and is easy to crush and absorb energy.

The energy-absorbing spare tire 1 is fixed on the sliding frame 18 by the spare tire drawstring 5 .

Beneficial effect

The telescopic energy-absorbing spare tire mechanism is installed on the front chassis of the car body, and occupies less height space than the hanging spare tire mounting frame, which can well solve some vehicles with limited skeleton height space, such as double-decker Spare tire installation problems on passenger cars, etc. At the same time, the distance sensor monitors the distance to the obstacle in front at all times, and the speed sensor monitors the driving speed. When the dangerous distance is reached and the set speed value is exceeded, the telescopic energy-absorbing spare tire mechanism will extend out of the vehicle body in advance. When the vehicle collides, The first is that the traditional bumper and the crushable connecting beam act as a buffer to absorb energy. The most important thing is that the energy-absorbing spare tire in this utility model can be decompressed through the safety valve on the energy-absorbing spare tire in the event of a collision, so as to maintain the internal pressure of the energy-absorbing spare tire. The pressure is 90% to 95% of the ultimate pressure of the energy-absorbing spare tire blowout, so that the vehicle can obtain a relatively constant buffer force in the process of collision, obtain a more ideal buffer collision effect, and ensure better protection of the driver and vehicle safety. If the safety hazard is removed, the unlocking block in the telescopic folding mechanism pulls the sliding sleeve to move back, and the left and right folding arms hinged on the sliding sleeve drive the front and rear folding sections to fold and recover, so that the telescopic folding can be released with only one pneumatic cylinder The locked position when the mechanism is fully extended, the purpose of making the carriage return to the initial position. Within a safe distance and a safe speed, the retractable energy-absorbing spare tire mechanism is hidden at the bottom of the vehicle body, without increasing the overall size of the vehicle.

Description of drawings

Fig. 1 is a top view schematic diagram when the telescopic energy-absorbing spare tire mechanism of the present invention is extended to the maximum value outside the vehicle;

Fig. 2 is a schematic diagram of the front view when the telescopic energy-absorbing spare tire mechanism of the present invention is extended to the maximum value outside the vehicle;

Fig. 3 is a right view schematic diagram when the telescopic energy-absorbing spare tire mechanism of the present invention is extended to the maximum value outside the vehicle;

Fig. 4 is A-A cross-sectional view of the cooperation of the fixed slide rail and the roller in Fig. 1;

Fig. 5 is a schematic diagram of the telescopic folding mechanism described in the present invention;

Fig. 6 is an enlarged left view schematic diagram of the connection between the sliding sleeve on the tappet and the left and right folding arms according to the utility model;

Fig. 7 is a schematic diagram of the spare tire mounting frame described in the utility model;

Fig. 8 is a schematic diagram of the retractable energy-absorbing spare tire mechanism in the initial position of the utility model;

Fig. 9 is a schematic diagram of a certain moment during the extending process of the telescopic energy-absorbing spare tire mechanism described in the present invention;

Fig. 10 is a schematic diagram when the telescopic energy-absorbing spare tire mechanism of the present invention is extended to the maximum value outside the vehicle;

Fig. 11 is a schematic diagram of the main dimension parameters of the telescopic energy-absorbing spare tire mechanism of the present invention when it is extended to the maximum value outside the vehicle.

In the figure: 1. Energy-absorbing spare tire 2. Safety valve 3. Telescopic folding mechanism 4. Spare tire mounting bracket 5. Spare tire strap 6. Bumper 7. Pneumatic cylinder 8. Tappet 9. Fixed section 10. Rear folding Section 11, front folding section 12, left folding arm 13, hinge 14, right folding arm 15, bolt for hinged hole 16, sliding sleeve 17, unlocking block 18, sliding frame 19, fixed slide rail 20, mounting block 21, Crushable connecting beam 22, sliding frame rear baffle plate 23, sliding frame upper cover plate 24, sliding frame lower supporting plate 25, roller 26, roller shaft

Detailed ways

Below in conjunction with accompanying drawing and embodiment, the specific embodiment of the utility model is further described. The following examples are only used to illustrate the technical solution of the utility model more clearly, but not to limit the protection scope of the utility model.

Referring to Fig. 1 to Fig. 7, a telescopic energy-absorbing spare tire mechanism is particularly suitable for being installed on a vehicle whose front chassis is a frame structure. And the bumper 6 is formed.

Wherein, the energy-absorbing spare tire 1 is provided with a safety valve 2, the energy-absorbing spare tire 1 is fixed on the sliding frame 18 by the spare tire drawstring 5, and when the vehicle collides, the energy-absorbing spare tire outside the vehicle is extended 1 As the main energy-absorbing element, the safety valve 2 can release the gas pressure to maintain the pressure in the energy-absorbing spare tire 1 at 90% to 95% of the limit pressure of the energy-absorbing spare tire 1 blowout, so that the vehicle can A relatively constant buffer force can be obtained in the middle, and a more ideal buffer collision effect can be obtained.

Wherein, the telescopic folding mechanism 3 includes a pneumatic cylinder 7, a tappet 8, a sliding sleeve 16, an unlocking block 17, a left folding arm 12, a right folding arm 14 and two longitudinal beams, and the tappet 8 is provided with a sliding sleeve 16. , the sliding sleeve 16 and the tappet 8 clearance fit, the left and right folding arms 12, 14 and the sliding sleeve 16 are connected by the bolt 15 for the hinged hole, the bolt 15 for the hinged hole is threaded with the sliding sleeve 16, and is connected with the left and right The right folding arms 12, 14 are hinged; the two longitudinal beams are respectively composed of a fixed section 9, a front folding section 11 and a rear folding section 10, and the other ends of the left and right folding arms 12, 14 are respectively connected to the front and rear of the two longitudinal beams. The folding sections 11 and 10 are hinged, the fixed section 9 is fixed on the chassis, and the tappet 8 is provided with an unlocking block 17 .

Wherein, the spare tire installation frame 4 includes a sliding frame 18 and a fixed slide rail 19, and the sliding frame 18 is a frame structure. Both sides of the fixed slide rail 19 are welded with mounting blocks 20 for installing the spare tire mounting frame 4 on the chassis. Three rollers 25 are respectively equipped with on both sides of the described sliding frame 18, and the described rollers 25 cooperate with the fixed slide rail 19 to realize moving forward and backward. The telescopic folding mechanism 3 is hinged with the sliding frame 18 through the front folding section 11, and controls the sliding frame 18 to extend out of the vehicle.

The front end of the sliding frame 18 is welded with a crushable connecting beam 21. The crushable connecting beam 21 is a square thin tube profile, which is segmented and stepped, easy to crush and absorb energy, and is connected with the bumper 6 by bolts. When the vehicle collides, the bumper 6 supported by the crushable connecting beam 21 is first in contact with the obstacle, and the crushable connecting beam 21 can be completely crushed to make the energy-absorbing spare tire 1 better Play the effect of cushioning and absorbing energy.

The vehicle is equipped with a distance sensor and a speed sensor. The distance signal measured by the distance sensor and the speed signal measured by the speed sensor are processed by the electronic control unit to jointly control the expansion and contraction of the pneumatic cylinder 7 .

8 to 10, the telescopic folding mechanism 3 controls the expansion and contraction of the sliding frame 18. Before the vehicle collides, the sliding frame 18 moves along the fixed slide rail 19 under the push of the tappet 8 in the pneumatic cylinder 7. The track moves forward until the front folding section 11 and the rear folding section 10 are fully unfolded, the left and right folding arms 12, 14 are on the same straight line and reach the locked position, at this time the energy-absorbing spare tire 1 protrudes out of the vehicle ahead of time First, the bumper 6 and the crushable connecting beam 21 are crushed, and then the protruding energy-absorbing spare tire 1 is decompressed through the safety valve 2, and the safety valve maintains the pressure value in the energy-absorbing spare tire 1 as the energy-absorbing spare tire. 90% to 95% of the ultimate pressure of tire 1 blowout, so that the vehicle can obtain a relatively constant buffer force during the collision process, obtain a more ideal buffer collision effect, and ensure the safety of the driver and the vehicle.

If the potential safety hazard is removed, the unlocking block 17 on the recovered tappet 8 drives the sliding sleeve 16 to move back, thereby driving the left and right folding arms 12, 14 hinged on the sliding sleeve 16 to pull the front and rear folding sections 11, 10 for folding and recycling , to achieve the purpose of only using one pneumatic cylinder to release the locking position when the telescopic folding mechanism 3 is fully extended, so that the sliding frame 18 returns to the initial position. In a safe distance and a safe vehicle speed, the sliding frame 18 is hidden in the bottom of the vehicle body. When the energy-absorbing spare tire 1 needs to be taken out or loaded, the bumper 6 can be removed.

Referring to FIG. 11 , it can be seen that the length L ₁ of the unlocking block 17 from the outer end of the tappet 8 and the lengths of the front folding section 11 and the rear folding section 10 are both a. In order to ensure that the telescoping and folding mechanism 3 is fully extended, the sliding sleeve 16 should not be restricted by the unlocking block 17 when moving to the front terminal point. Therefore, the length between the unlocking block 17 and the outer end of the tappet 8 is determined: L ₁ ≤ a is based on ignoring the dimensions of hinges and sleeves.

According to the size of the spare tire of the specific model and the size of the front space of the vehicle body, determine other structural dimensions, the amount of air intake of the cylinder, the value of the safe distance, the value of the safe speed, the delay control of the electronic control unit, etc.

Claims (4)

1. A telescopic energy-absorbing spare tire mechanism, comprising an energy-absorbing spare tire (1), a telescopic folding mechanism (3), a spare tire mounting frame (4) and a bumper (6), characterized in that: The telescopic folding mechanism (3) includes a pneumatic cylinder (7), a tappet (8), a left folding arm (12), a right folding arm (14) and two longitudinal beams; A sliding sleeve (16) is provided, and the sliding sleeve (16) and the tappet (8) are in clearance fit, and the left and right folding arms (12, 14) and the sliding sleeve (16) are connected by the bolts (15) used for reaming holes, The bolts (15) used for hinged holes are threadedly connected with the sliding sleeve (16) and hinged with the left and right folding arms (12, 14); the two longitudinal beams are respectively composed of the fixed section (9) and the front folding section ( 11) and the rear folding section (10), the other ends of the left and right folding arms (12, 14) are respectively hinged with the front and rear folding sections (11, 10) of the two longitudinal beams, and the fixed section (9) is fixed on on the chassis; An unlocking block (17) is arranged on the tappet (8), the length of the unlocking block (17) from the outer end of the tappet (8) is L ₁ , the length of the front folding section (11) is a, L ₁ ≤ a; The energy-absorbing spare tire (1) is provided with a safety valve (2), and the safety valve (2) is set to maintain the pressure in the energy-absorbing spare tire (1) as the limit pressure of the energy-absorbing spare tire (1) bursting 90% ~ 95% of; The spare tire installation frame (4) includes a sliding frame (18) and a fixed slide rail (19), the fixed slide rail (19) is fixed on the chassis, and the front end of the sliding frame (18) passes through a crushable connecting beam (21 ) is fixedly connected with the bumper (6), the telescopic folding mechanism (3) is hinged with the sliding frame (18) through the front folding section (11), and controls the sliding frame (18) to protrude a part outside the vehicle. 2. A telescopic energy-absorbing spare tire mechanism according to claim 1, characterized in that: the fixed sliding rail (19) is fixed on the chassis through the mounting block (20), and the sliding frame ( 18) Three rollers (25) are installed on both sides, and the rollers (25) roll and cooperate with the fixed slide rail (19) to realize forward and backward movement. 3. A telescopic energy-absorbing spare tire mechanism according to claim 1, characterized in that: the crushable connecting beam (21) is a square thin tube profile, which is segmented and stepped, and is easy to crush and absorb able. 4. A telescopic energy-absorbing spare tire mechanism according to claim 1, characterized in that: the energy-absorbing spare tire (1) is fixed on the sliding frame (18) by a spare tire strap (5).