Engine hood bouncing device and vehicle

Abstract

The utility model discloses an engine hood bouncing device and a vehicle, and relates to the technical field of automobile safety, the engine hood bouncing device comprises a piston cylinder, a piston rod, a gas generator and a sealing piece, the piston rod is located in the piston cylinder, the gas generator is installed at one end of the piston cylinder, and the piston rod can be pushed to move after excitation; the sealing piece is used for forming a closed cavity between the gas generator and the sealing piece, and the sealing piece is located between the piston rod and the gas generator. By reducing the number of parts, the purpose of reducing assembly procedures is achieved, production efficiency is further improved, production cost is reduced, and a better using effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile safety devices, and more specifically, to a hood pop-up device. In addition, the utility model also relates to a vehicle including the above hood pop-up device. Background Art

[0002] When an accident occurs during normal driving of an automobile, the front of the vehicle hits a pedestrian, and the pedestrian's head is likely to directly collide rigidly with the automobile hood, resulting in injury to the pedestrian's head. To effectively reduce the degree of injury caused by the rigid collision between the pedestrian's head and the hood after the collision, a buffer mechanism is designed on the hood. After the collision occurs, before the pedestrian's head comes into contact with the hood, the hood is lifted by a certain distance. The contact time between the pedestrian's head and the engine is short, and the distance from the pedestrian's head to the hood can be reduced, thereby changing the rigid collision into an elastic collision, playing a role in buffering and energy absorption, so as to reduce the harm to the pedestrian.

[0003] There are some problems with the hood pop-up devices in the prior art:

[0004] As shown in the attached... Figure 1 In the figure, the buffer pad is an independent part, which is arranged inside the piston tube, close to the end of the piston tube, and sleeved on the piston rod 2. There is a piston block 3 on the piston rod, and an annular groove is arranged on the piston rod 3. An O-ring is sleeved on the annular groove on the piston rod 3, thus forming a sealed chamber. However, in the above structure, additional processing procedures are required for the annular groove of the piston rod 3, increasing the part cost. When the O-ring is installed in the annular groove of the piston rod 3, auxiliary tools are needed, increasing the auxiliary tools and the assembly beat is slow, that is, the cost is increased.

[0005] In summary, how to reduce the processing procedures and improve the assembly efficiency is an urgent problem to be solved by those skilled in the art at present. Summary of the Utility Model

[0006] In view of this, the purpose of the utility model is to provide a hood pop-up device, which reduces the processing procedures and the number of parts and improves the assembly efficiency.

[0007] In addition, another purpose of the utility model is to provide a vehicle including the above hood pop-up device.

[0008] To achieve the above purpose, the utility model provides the following technical solutions:

[0009] A hood pop-up device, comprising:

[0010] A piston cylinder;

[0011] A piston rod, located inside the piston cylinder;

[0012] A gas generator is installed at one end of the piston cylinder. After being activated, the gas generator can push the piston rod to move.

[0013] A seal is used to form a sealed chamber between the gas generator and the seal. The seal is located between the piston rod and the gas generator.

[0014] The present utility model further includes:

[0015] An anti - detachment member is located at the other end of the piston cylinder and is used to prevent the piston rod from completely popping out of the piston cylinder.

[0016] At one end of the piston rod close to the gas generator, a piston block with a diameter larger than that of the piston rod is provided in the present utility model. The anti - detachment member can prevent the piston rod from completely popping out of the piston cylinder by limiting the piston block.

[0017] In the present utility model, the seal is made of rubber or silica gel. The seal is hemispherical, and the diameter of the seal is larger than the diameter of the piston cylinder.

[0018] At the end of the piston cylinder far from the gas generator, a funnel structure is provided for axially positioning the piston rod in the present utility model.

[0019] In the present utility model, the anti - detachment member is a protrusion provided on the inner wall of the piston cylinder.

[0020] In the present utility model, the protrusion and the piston cylinder are integrally formed by stamping.

[0021] In the present utility model, there are at least two protrusions, and the protrusions are circumferentially arranged in an array along the axis of the piston rod.

[0022] The present utility model further includes:

[0023] A sealing cover is detachably installed on the piston cylinder.

[0024] A vehicle includes the hood pop - up device according to any one of the above. The hood pop - up device is installed under the vehicle hood.

[0025] The hood pop-up device provided by the present utility model, when in use, installs the piston rod inside the piston cylinder to ensure that the piston rod can slide freely inside the piston cylinder, and seals and installs the gas generator at one end of the piston cylinder. The seal is used to form a sealed chamber between the gas generator and the seal. The seal is located between the piston rod and the gas generator. That is to say, placing the seal between the piston rod and the gas generator avoids the need to separately open a groove on the piston rod, reduces the production process of the piston rod, improves the production efficiency of the piston rod, reduces its production cost. At the same time, during assembly, no auxiliary tool is required, and only the seal needs to be placed between the piston rod and the gas generator, which is convenient and fast, greatly improving the assembly efficiency, that is, reducing the cost.

[0026] The vehicle provided by the present utility model includes the above hood pop-up device, has the above beneficial effects, and at the same time shortens the vehicle production cycle and reduces the assembly workload. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0028] Figure 1 Schematic diagram of the piston rod design solution in the prior art;

[0029] Figure 2 Schematic diagram of the overall structure design solution in the prior art of the present utility model;

[0030] Figure 3 Schematic diagram of the axonometric structure of the overall structure provided by the present utility model;

[0031] Figure 4 Schematic diagram of the internal axonometric structure of the overall structure provided by the present utility model;

[0032] Figure 5 Schematic diagram of the disassembled structure of the overall structure provided by the present utility model;

[0033] Figure 6 Schematic diagram of the seal structure provided by the present utility model.

[0034] Figures 1-6 Among them, the reference numerals include:

[0035] 1. Piston cylinder; 2. Piston rod; 3. Piston block; 4. Seal; 5. Gas generator; 6. Sealing cover; 7. Anti-disengagement part. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0037] The core of the present utility model is to provide a hood pop-up device, which reduces the processing procedures and the number of parts and improves the assembly efficiency. Another core of the present utility model is to provide a vehicle including the above-mentioned hood pop-up device, which has the effects of short production cycle and high production efficiency of vehicle components.

[0038] Please refer to Figures 1-6 , a hood pop-up device, including a piston cylinder 1, a piston rod 2, a gas generator 5 and a seal 4. The piston rod 2 is located inside the piston cylinder 1. The gas generator 5 is installed at one end of the piston cylinder 1 and can push the piston rod 2 to move after being activated. The seal 4 is used to form a sealed chamber between the gas generator 5 and the seal 4. The seal 4 is located between the piston rod 2 and the gas generator 5.

[0039] During use, the piston rod 2 is installed inside the piston cylinder 1 to ensure that the piston rod 2 can slide freely inside the piston cylinder 1. And the gas generator 5 is hermetically installed at one end of the piston cylinder 1. The seal 4 is used to form a sealed chamber between the gas generator 5 and the seal 4. The seal 4 is located between the piston rod 2 and the gas generator 5. That is to say, the seal 4 is placed between the piston rod 2 and the gas generator 5, avoiding the need to separately open a groove on the piston rod 2, reducing the production process of the piston rod 2, improving the production efficiency of the piston rod 2, reducing its production cost. At the same time, during assembly, no auxiliary tool is required, and only the seal 4 needs to be placed between the piston rod 2 and the gas generator 5, which is convenient and fast, greatly improving the assembly efficiency, that is, reducing the cost.

[0040] It should be noted that the specific shape and material of the seal 4 in the embodiments of the present utility model are not limited. As long as it can complete the seal between it and the gas generator 5, so that the air pressure inside the sealed cavity increases after the gas generator 5 is activated. In some embodiments, it can adopt the same shape as the cross-section of the piston cylinder 1, and the material can be selected from common sealing materials, such as rubber or silica gel, etc.

[0041] In addition, the connection method between the seal 4 and the piston rod 2 in the embodiments of the present utility model is not limited. In some embodiments, it can only be in contact with the piston rod 2 without connection, or can be detachably or fixedly installed at the end of the piston rod 2.

[0042] In addition, the embodiment of the present utility model does not limit the connection method of installing the gas generator 5 at the end of the piston cylinder 1.

[0043] Please continue to refer to Figure 3 , in order to avoid the danger caused by the piston rod 2 being completely ejected from the piston cylinder 1 after the gas generator 5 is activated, in some embodiments, a retaining member 7 is further included, which is located at the other end of the piston cylinder 1 and is used to prevent the piston rod 2 from being completely ejected from the piston cylinder 1. That is to say, by providing the retaining member 7 at the end of the piston cylinder 1 to prevent the piston rod 2 from being completely ejected from the piston cylinder 1, the danger caused by the piston rod being completely ejected from the piston cylinder 1 is avoided, which is beneficial to further improving the safety of the device during use and avoiding secondary injuries to pedestrians when the vehicle collides with pedestrians.

[0044] It should be noted that the embodiment of the present utility model does not limit the specific implementation structure between the retaining member 7 and the piston rod 2. As long as it can achieve that after the gas generator 5 is activated, the retaining member 7 prevents the piston rod 2 from being completely ejected from the piston cylinder 1.

[0045] In addition, the embodiment of the present utility model does not limit the specific structure of the retaining member 7 and the connection relationship with the piston cylinder 1. In some embodiments, it can adopt any structure that can prevent the piston rod 2 from being completely ejected from the piston cylinder 1, and at the same time, it can also be installed on the piston cylinder 1 by means of integral molding or welding with the piston cylinder 1.

[0046] Please continue to refer to Figure 3 and Figure 5 , in some embodiments, a piston block 3 with a diameter larger than that of the piston rod 2 is provided at one end of the piston rod 2 close to the gas generator 5. The retaining member 7 can prevent the piston rod 2 from being completely ejected from the piston cylinder 1 by limiting the piston block 3. That is to say, a piston block 3 with a diameter larger than that of the piston rod 2 is provided at one end of the piston rod 2 close to the gas generator 5, the piston cylinder 1 and the piston rod 2 are fixedly connected, and the retaining member 7 restricts the piston block 3, so as to avoid the piston rod 2 being completely ejected from the piston cylinder 1, which is beneficial to improving the safety of the device during use.

[0047] It should be noted that the embodiment of the present utility model does not limit the fixing method between the piston rod 2 and the piston block 3. In some embodiments, it can adopt the integral molding method of the piston rod 2 and the piston block 3, or the piston block 3 can be fixed on the piston rod 2 by welding.

[0048] Please continue to refer to Figure 6 , in order to further improve the sealing effect of the sealing member 4 and reduce the production cost, in some embodiments, the sealing member 4 is made of rubber or silica gel. That is to say, the sealing member 4 made of silica gel material is sealed with the piston cylinder 1. Rubber or silica gel materials are inexpensive and easier to produce, which is beneficial to reducing the production cost.

[0049] It should be noted that the limitation on the material of the seal 4 in the embodiments of the present utility model is not a fixed limitation. In some embodiments, other materials that can achieve a sealing effect may also be used.

[0050] Optionally, in some embodiments, the seal is hemispherical, and the diameter of the seal is greater than the diameter of the piston cylinder.

[0051] Please refer to Figures 3-5 , in order to further improve the stability of the piston rod 2 during the sliding process and at the same time enhance the limiting effect on the piston rod 2, the end of the piston cylinder 1 away from the gas generator 5 is a funnel structure that can position the axis of the piston rod 2. That is to say, by reducing the aperture of the end of the piston cylinder 1 away from the gas generator 5, its side is a frustum-shaped structure, and its outlet diameter is the same as the diameter of the piston rod 2, so as to achieve the fixation of the axis of the piston rod 2, make it stable during the sliding process inside the piston cylinder 1, avoid shaking and resulting in the offset of the movement of the piston rod 2, and at the same time this shape structure can also block the piston block 3 and prevent it from completely popping out of the piston cylinder 1, thereby further enhancing the safety during its use.

[0052] It should be noted that the limitation that the end of the piston cylinder 1 away from the gas generator 5 in the embodiments of the present utility model is a funnel structure that can position the axis of the piston rod 2 is not a fixed limitation. In some embodiments, other structures that can limit the axis of the piston rod 2 may also be used, as long as the axis of the piston rod 2 can be limited.

[0053] Please refer to Figure 3 , in some embodiments, the anti-disengagement member 7 is a protrusion provided on the inner wall of the piston cylinder 1. That is to say, a protrusion is provided on the inner wall of the end of the piston cylinder 1 away from the gas generator 5, and the protrusion can play a role in blocking the piston block 3, avoiding the piston rod 2 directly colliding with the piston tube and causing deformation of the piston tube, and can also prevent the piston rod 2 from directly popping out of the piston cylinder 1, which is beneficial to further enhancing the safety during its use.

[0054] It should be noted that the embodiments of the present utility model do not limit the number of protrusions. In some embodiments, a single protrusion or multiple protrusions can be used, and both can achieve the limitation of the position of the piston rod 2.

[0055] In addition, the embodiments of the present utility model do not limit the specific shape of the protrusion. As long as it can limit the piston rod 2.

[0056] In addition, the embodiments of the present utility model do not limit the formation and installation of the protrusion. In some embodiments, it can be fixedly installed on the inner wall of the piston cylinder 1, and its fixing method can be integrally formed, welded or riveted.

[0057] Please continue to refer to Figures 3-5 , in some embodiments, the protrusion is integrally stamped with the piston cylinder 1. That is to say, the protrusion is formed by stamping the piston cylinder 1 with a stamping machine and integrally formed. This method can reduce the use of materials, lower costs, and has stronger firmness. At the same time, the stamping deformation method will improve the strength of the piston cylinder 1, which is beneficial to enhancing the strength of the entire device.

[0058] Please continue to refer to Figures 3-5 , in some embodiments, there are at least two protrusions, and the protrusions are circumferentially arrayed along the axis of the piston rod 2. That is to say, at least these two protrusions are circumferentially arrayed along the axis of the piston rod 2, so as to achieve uniform contact with the piston block 3, further improving the limiting stability of the piston block 3 and avoiding the situation where the position of the piston rod 2 is offset when limiting the piston rod 2, resulting in the failure or reduction of the bouncing effect.

[0059] Please refer to Figures 3-5 , in some embodiments, it further includes a sealing cover 6, which is detachably installed on the piston cylinder 1. That is to say, by installing the detachable sealing cover 6, it is used to seal the piston cylinder 1.

[0060] In some embodiments, a buckle corresponding to the position of the protrusion can be provided inside the sealing cover 6. Since the outside of the piston cylinder 1 at the position of the protrusion is in a groove state, the buckle can be placed inside the groove to fix the sealing cover 6.

[0061] In some embodiments, the connection between the sealing cover 6 and the piston cylinder 1 can also be achieved by the interference fit between the sealing cover 6 and the piston cylinder 1.

[0062] In addition, the present application also provides a vehicle including the above-mentioned hood pop-up device. The piston cylinder 1 for popping up the hood is provided at the hood position of the vehicle. For the structures of other parts of the vehicle, please refer to the prior art and will not be elaborated herein.

[0063] Since the vehicle is provided with the above-mentioned hood pop-up device, the production cycle of the vehicle can be shortened to improve production efficiency. That is to say, the key point of the embodiment of the present utility model is: installing the piston rod 2 inside the piston cylinder 1 to ensure that the piston rod 2 can slide freely inside the piston cylinder 1, and sealingly installing the gas generator 5 at one end of the piston cylinder 1. The seal 4 is used to form a sealed chamber between the gas generator 5 and the seal 4. The seal 4 is located between the piston rod 2 and the gas generator 5. That is to say, placing the seal 4 between the piston rod 2 and the gas generator 5 avoids the need to separately open a groove on the piston rod 2, reduces the production process of the piston rod 2, improves the production efficiency of the piston rod 2, reduces its production cost. At the same time, during assembly, no auxiliary tool is required, and only the seal 4 needs to be placed between the piston rod 2 and the gas generator 5, which is convenient and fast, greatly improving the assembly efficiency, that is, reducing the cost.

[0064] The various embodiments in this specification are described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. For the same or similar parts among the various embodiments, reference can be made to each other.

[0065] The above has introduced in detail a hood pop-up device and a vehicle provided by the present utility model. Specific examples are used in this article to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and modifications can be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

Claims

1. A hood pop-up device, characterized in that: include: Piston cylinder (1); A piston rod (2) located inside the piston cylinder (1); A gas generator (5) is installed at one end of the piston cylinder (1), and the gas generator (5) can push the piston rod (2) to move after being energized; A sealing member (4) is used to form a sealed chamber between the gas generator (5) and the sealing member (4); the sealing member (4) is located between the piston rod (2) and the gas generator (5).

2. The hood pop-up device according to claim 1, characterized in that: Also includes: An anti-dropping member (7) is located at the other end of the piston cylinder (1) and is used to prevent the piston rod (2) from completely popping out of the piston cylinder (1).

3. The hood pop-up device according to claim 2, characterized in that: A piston block (3) having a diameter greater than that of the piston rod (2) is provided at one end of the piston rod (2) close to the gas generator (5), and the anti-dropping member (7) can prevent the piston rod (2) from completely popping out of the piston cylinder (1) by limiting the position of the piston block (3).

4. The hood pop-up device according to claim 3, characterized in that: The end of the piston cylinder (1) away from the gas generator (5) is a funnel structure that can be used to position the axis of the piston rod (2).

5. The hood pop-up device according to claim 4, characterized in that: The anti-dropping member (7) is a protrusion arranged on the inner wall of the piston cylinder (1).

6. The hood pop-up device according to claim 5, characterized in that: The protrusion and the piston cylinder (1) are integrally stamped and formed.

7. The hood pop-up device according to claim 6, characterized in that: There are at least two protrusions, which are distributed in a circular array along the axis of the piston rod (2).

8. The hood pop-up device according to any one of claims 1 to 7, characterized in that: The sealing member (4) is a rubber sealing member or a silicone sealing member, the sealing member is hemispherical, and the diameter of the sealing member is greater than the diameter of the piston cylinder.

9. The hood pop-up device according to any one of claims 1 to 7, characterized in that: Also includes: A sealing cover (6) is detachably mounted on an end of the piston cylinder (1) away from the gas generator.

10. A vehicle, characterized in that: The invention comprises the hood pop-up device as described in any one of claims 1 to 9.

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