A buffer structure for the front bumper of a vehicle body

Abstract

The present invention discloses a buffer structure for the front bumper of a vehicle body, belonging to the technical field of bumpers, including a first cylinder body. An active rod is built inside the first cylinder body, and the active rod can move axially and radially within the first cylinder body. A plurality of first elastic parts are evenly distributed circumferentially inside the first cylinder body. The second elastic part has two ends, a first support part, and a second support part. Both the first support part and the second support part are located between the two ends. The two ends of the second elastic part are respectively fixed to the active rod and inside the first cylinder body. Through the mutual cooperation of the buffer mechanisms of the first elastic part in the axial and radial directions, the present invention provides all-round buffering for the active rod. During the complex movement process, the active rod may be simultaneously subjected to axial and radial impact forces. At this time, the first elastic part can play a role in both of these two directions, effectively reducing the impact of the impact and vibration on the vehicle.

Description

Technical Field

[0001] The present invention relates to a buffer structure for the front bumper of a vehicle body, belonging to the technical field of bumpers. Background Art

[0002] A buffer member is installed on the front bumper of a traditional electric tricycle. When the bumper is impacted, the buffer member plays a buffering role. For example, the electric tricycle frame disclosed in Chinese Patent (CN210852751U) adopts the following solution: including a main frame beam, a load-bearing beam is installed on the main frame beam, a support column is provided between the main frame beam and the load-bearing beam, one end of the main frame beam is movably installed with a horizontally arranged buffer rod, one end of the buffer rod is rotatably connected to a bumper, a buffer groove is provided on the main frame beam, a guide rod is provided in the buffer groove, and a moving plate and a spring are slidably sleeved on the guide rod.

[0003] The deficiencies of the above prior art are as follows: the buffering direction is single, only providing protection against impacts in one direction (such as forward). For impacts from other directions (such as side or backward), the bumper may not provide sufficient buffering effect, reducing the overall safety of the vehicle.

[0004] Therefore, a buffer structure for the front bumper of a vehicle body is proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a buffer structure for the front bumper of a vehicle body to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention adopts the following technical scheme: A buffer structure for the front bumper of a vehicle body, including:

[0007] A first cylinder body, which is installed between the front bumper and the vehicle body;

[0008] A movable rod, which is arranged in the first cylinder body, both ends of the movable rod extend outside the first cylinder body, and one end of them is suspended to form a suspended part;

[0009] A plurality of first elastic parts, which are circumferentially and evenly distributed in the first cylinder body. The first elastic part has two ends, a first support part and a second support part, and both the first support part and the second support part are located between the two ends; wherein, the two ends of the first elastic part are respectively fixed on the movable rod and the first cylinder body, the first support part is slidably arranged on the inner wall of the first cylinder body, and the second support part has at least two states:

[0010] When in the first state, there is a gap between the second support part and the outer wall of the movable rod;

[0011] When in the second state, the second support part abuts against the movable rod.

[0012] Preferably, one end of the first cylinder body away from the suspension part of the movable rod is connected to the movable rod through a second elastic part. The second elastic part is an annular elastic body. The outer ring wall of the second elastic part is fixedly connected to the first cylinder body, and the inner ring wall of the second elastic part is slidably connected to the movable rod.

[0013] Preferably, a first contact point is formed at the position where the first support part contacts the inner wall of the first cylinder body, and a second contact point is formed at the position where the second support part contacts the movable rod. The first contact point and the second contact point are distributed alternately.

[0014] Preferably, a vehicle front bumper buffer structure further includes a guiding assembly. The guiding assembly includes a guiding slider and a guiding groove. The first support part is slidably arranged on the inner wall of the first cylinder body through the guiding slider, and a guiding groove for the guiding slider to slide is formed on the inner wall of the first cylinder body.

[0015] Preferably, a second cylinder body is fixedly arranged on the first cylinder body. The suspension part of the movable rod extends into the second cylinder body, and a lining part and a rotating ball are arranged inside the second cylinder body;

[0016] The lining part is fixed inside the second cylinder body, the rotating ball is rotatably arranged inside the lining part, and a rotating groove for the rotating ball to rotate is formed on the lining part;

[0017] A sliding groove is formed on the rotating ball, and the axis of the sliding groove passes through the center of the ball of the rotating ball. The movable rod is slidably arranged in the sliding groove.

[0018] Preferably, an anti - detachment block is slidably arranged in the sliding groove. The anti - detachment block is fixed on the movable rod. The diameter of the anti - detachment block is larger than the rod diameter of the movable rod, and a limiting block is fixed on the sliding groove.

[0019] Preferably, a spring is arranged in the sliding groove. One end of the spring is connected to the end of the anti - detachment block, and the other end of the spring is connected to the bottom of the sliding groove.

[0020] Preferably, the cross - section of the first elastic part is rectangular.

[0021] Compared with the prior art:

[0022] Through the mutual cooperation of the buffering mechanisms of the first elastic part in the axial and radial directions, the present invention provides all - round buffering for the movable rod. During the complex movement process, the movable rod may be simultaneously subjected to axial and radial impact forces. At this time, the first elastic part can play a role in both of these two directions, effectively reducing the impact of impact and vibration on the vehicle.

[0023] When the movable rod moves axially, the movable rod pushes the upper end of the first elastic part downward. At this time, the movable rod compresses the first elastic part to move, and the first elastic part is compressed and deformed to generate buffer potential energy. The buffer potential energy generated by the compression deformation of the first elastic part is used to buffer the axial movement of the movable rod, forming a preliminary buffer effect. When the axial movement of the movable rod is relatively large, the compression stroke of the first elastic part is increased. After the second support part approaches the movable rod and displaces, it will abut against the side wall of the movable rod, forming a support point. At this time, the deformation difficulty of the first elastic part increases, forming a stronger buffer to further improve the buffer effect.

[0024] When the movable rod generates a radial deflection, the first elastic part pushed by the movable rod can still be deformed to generate buffer potential energy, so that the first elastic part can generate a buffer in the radial direction when the movable rod is subjected to a radial impact force. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a cross-sectional view of the present invention.

[0026] Figure 2 It is a schematic diagram of the force on the movable rod and the buffer body of the present invention Figure 1 。

[0027] Figure 3 It is a schematic diagram of the force on the movable rod and the buffer body of the present invention Figure 2 。

[0028] Figure 4 It is a schematic diagram of the distribution of the buffer bodies of the present invention.

[0029] Figure 5 It is a schematic diagram of the connection between the present invention and the bumper.

[0030] Figure 6 It is a cross-sectional view of the first cylinder block, the first elastic part and the guiding assembly of the present invention.

[0031] Figure 7 It is an exploded cross-sectional view of the movable rod, the rotating ball and the anti-detachment block of the present invention.

[0032] In the figure: 1. First cylinder block, 2. Movable rod, 3. First elastic part, 4. Guiding assembly, 401. Guiding slider, 402. Guide groove, 5. Second cylinder block, 6. Lining part, 7. Rotating ball, 701. Chute, 8. Anti-detachment block, 9. Spring, 10. Second elastic part, 11. Limit block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The following specific embodiments are used to illustrate the present invention, but they do not limit the invention.

[0034] Embodiment 1

[0035] As Figures 1 - 7As shown in the figure, in this embodiment, a buffer structure for the front bumper of a vehicle body is provided, which includes a first cylinder 1 installed between the front bumper and the vehicle body; a movable rod 2 is arranged in the first cylinder 1, and both ends of the movable rod 2 extend outside the first cylinder 1; among them, one end of the movable rod 2 extending outside the first cylinder 1 is suspended; a plurality of the first elastic parts 3 are evenly distributed circumferentially in the first cylinder 1. The number of the first elastic parts 3 can be set to six, and the six first elastic parts 3 are evenly distributed around the movable rod 2 to ensure effective buffering in any direction. Each first elastic part 3 has two ends, a first support part and a second support part, and both the first support part and the second support part are located between the two ends; among them, the two ends of the first elastic part 3 are respectively fixed on the movable rod 2 and inside the first cylinder 1, the first support part is slidably arranged on the inner wall of the first cylinder 1, and the second support part has at least two states.

[0036] As Figure 1 shown, when in the first state, the first elastic part 3 is in an extended state. At this time, the second support part does not contact the outer wall of the movable rod 2, so that there is a gap between the second support part and the outer wall of the movable rod 2;

[0037] As Figure 2 shown, when in the second state, the first elastic part 3 is in a compressed deformation state. After the first elastic part 3 is compressed and deformed, the second support part slides towards the side of the movable rod 2, and the second support part can be pressed tightly against the movable rod 2.

[0038] A first contact point is formed at the position where the first support part contacts the inner wall of the first cylinder 1, a second contact point is formed at the position where the second support part contacts the movable rod 2, the first contact point and the second contact point are distributed alternately, the first elastic part 3 is a multi-segment arc structure, and the cross-section of the first elastic part 3 is rectangular; for example Figure 1 shown, that is, the number of the first contact points is two, and the number of the second contact points is one.

[0039] Combined with Figures 1 - 3 shown, for the deformation of the movable rod 2 that generates buffering effects in the axial and radial directions;

[0040] Axial buffering:

[0041] As Figure 2As shown in the figure, when the movable rod 2 moves axially in the direction of the arrow, the movable rod 2 pushes the upper end of the first elastic part 3 downward. At this time, the movable rod 2 compresses the first elastic part 3 to move, and the first elastic part 3 is compressed and deformed to generate buffer potential energy. The adjacent two first support parts gradually approach, and at the same time the second support part approaches the movable rod 2 and displaces. In this process, the buffer potential energy generated by the compression deformation of the first elastic part 3 is used to buffer the axial movement of the movable rod 2, forming a preliminary buffer effect; when the axial movement of the movable rod 2 in the direction of the arrow is relatively large, the downward displacement of the upper end of the first elastic part 3 pushed by the movable rod 2 becomes larger, so that the compression stroke of the first elastic part 3 increases. After the second support part approaches the movable rod 2 and displaces, it will abut against the side wall of the movable rod 2, forming a support point (i.e., the second contact point). At this time, the deformation difficulty of the first elastic part 3 increases, forming a stronger buffer and further improving the buffer effect; in addition, after the support point is formed, a certain frictional force is also generated on the movable rod 2, which can also further increase the buffer effect to a certain extent.

[0042] In addition, it should be noted that the sliding of the second support part is realized by the guide groove 402 provided on the first cylinder body 1 (see the following content for details). The length of the guide groove 402 needs to be determined according to the deformation length of the first elastic part 3, that is, it is necessary to ensure that when the second support part abuts against the movable rod 2, the first support part can still move a certain distance in the guide groove 402.

[0043] Radial buffer:

[0044] As Figure 3 shown in the figure, when the movable rod 2 moves radially in the direction of the arrow, the movable rod 2 pushes the left part of the first elastic part 3 to deform, and at the same time the right part of the first elastic part 3 also deforms. At this time, the left part of the first elastic part 3 has a tendency to be compressed, and the right part of the first elastic part 3 has a tendency to be stretched. Thus, when the movable rod 2 is subjected to a radial impact force, the first elastic part 3 can generate a buffer in the radial direction.

[0045] Comprehensive effect of buffering:

[0046] The buffer mechanisms of the first elastic part 3 in the axial and radial directions cooperate with each other to provide comprehensive protection for the movable rod 2. In a complex movement process, the movable rod 2 may be simultaneously subjected to axial and radial impact forces. At this time, the first elastic part 3 can play a role in these two directions at the same time, effectively reducing the impact and vibration on the system.

[0047] As Figure 6As shown in the figure, in order to ensure that the first support portion slides axially along the first cylinder 1, a buffer structure for the front bumper of a vehicle body further includes a guiding assembly 4. The guiding assembly 4 includes a guiding slider 401 and a guiding groove 402. The guiding slider 401 is fixed on the first support portion of the first elastic portion 3, and the guiding slider 401 is arranged in a T shape; the guiding groove 402 is formed on the inner wall of the first cylinder 1, the length direction of the guiding groove 402 is parallel to the axis direction of the first cylinder 1, and the guiding slider 401 is slidably connected inside the guiding groove 402;

[0048] Since the guiding slider 401 is fixed on the first support portion of the first elastic portion 3 and is designed in a T shape (for the convenience of installing the guiding slider 401 into the guiding groove 402, the T-shaped guiding slider 401 is formed by splicing two L-shaped blocks. The two L-shaped blocks are separately placed inside the guiding groove 402 and are spliced inside the guiding groove 402, which is convenient for installing the guiding slider 401), the T-shaped structure enables the guiding slider 401 to be firmly embedded in the guiding groove 402, effectively preventing deviation or shaking during the sliding process;

[0049] On the other hand, the guiding groove 402 is formed on the inner wall of the first cylinder 1, and its length direction is parallel to the axis direction of the first cylinder 1, ensuring that when the movable rod 2 moves, the first support portion can stably slide axially along the trajectory of the guiding groove 402. The cooperation between the guiding groove 402 and the guiding slider 401 can ensure that the first support portion and the inner wall of the first cylinder 1 are always in contact, avoiding the separation of the first support portion from the inner wall of the first cylinder 1, and the size and shape of the guiding groove 402 match those of the guiding slider 401, ensuring that the guiding slider 401 can smoothly slide inside the guiding groove 402.

[0050] Embodiment 2

[0051] As Figures 1 - 7 shown, on the basis of Embodiment 1, specifically, a second cylinder 5 is fixedly arranged on the first cylinder 1. One end of the movable rod 2 that is suspended extends into the second cylinder 5. An inner liner 6 and a rotating ball 7 are arranged inside the second cylinder 5. The inner liner 6 fills the entire inner cavity of the second cylinder 5, and a spherical rotating groove is formed inside the inner liner 6. The material of the inner liner 6 has good wear resistance and compressive resistance; the rotating ball 7 is rotatably connected inside the rotating groove (for the convenience of installing the rotating ball 7 in the rotating groove, the inner liner 6 is formed by splicing upper and lower parts), the outer contour of the rotating ball 7 matches the inner contour of the rotating groove, a sliding groove 701 is formed on the rotating ball 7, the axis of the sliding groove 701 coincides with the center of the rotating ball 7, and one end of the sliding groove 701 opens towards the inner cavity of the first cylinder 1; wherein, the end of the movable rod 2 extends into the sliding groove 701. When the movable rod 2 is subjected to a radial force, the end of the movable rod 2 inserted into the sliding groove 701 can swing along with the rotating ball 7, that is, swing around the center of the rotating ball 7.

[0052] When the front bumper of the electric tricycle is subjected to an external impact, the movable rod 2 will move axially and radially. Inside the first cylinder block 1, the first elastic part 3 will deform to buffer the movable rod 2. At the same time, the end of the movable rod 2 moves in the chute 701, driving the rotating ball 7 to rotate in the rotating groove of the inner lining part 6. This rotation further enhances the flexibility and adaptability of the buffer structure and can better cope with impact forces in different directions.

[0053] As Figure 7 shown, in order to prevent the end of the movable rod 2 from disengaging from the chute 701, a anti-disengagement block 8 is fixed at one end of the movable rod 2 extending into the chute 701. The diameter of the anti-disengagement block 8 is larger than the rod diameter of the movable rod 2, and the peripheral surface of the anti-disengagement block 8 is slidably connected to the groove wall of the chute 701. A limit block 11 is fixed on the chute 701, and the anti-disengagement block 8 can be restricted in the chute 701 by the limit block 11, so as to ensure that the suspension part of the movable rod 2 will not disengage from the chute 701.

[0054] A spring 9 is arranged between the bottom of the chute 701 and the anti-disengagement block 8, which can cooperate with the first elastic part 3 to form further buffering. One end of the spring 9 is connected to the end of the anti-disengagement block 8, and the other end of the spring 9 is connected to the bottom of the chute 701. When the front bumper of the electric tricycle is subjected to an external impact, the movable rod 2 will move towards one end of the chute 701, causing the spring 9 to deform.

[0055] Embodiment Three

[0056] On the basis of the above embodiment, a second elastic part 10 is arranged at the end of the first cylinder block 1. One end of the movable rod 2 penetrates out of the first cylinder block 1 from the inner ring of the second elastic part 10. The second elastic part 10 realizes sealing while being able to play a certain buffering role, so that there is a certain sealing effect between the inner ring of the second elastic part 10 and the movable rod 2. The material of the second elastic part 10 can be rubber.

[0057] Furthermore, the buffer structure in this application is mainly applied to the connection between the vehicle body and the bumper. As Figure 5 shown, when both ends of the bumper are directly connected to the vehicle body without the buffer structure in this application, it will directly act on the vehicle body during buffering; during connection, the movable rod 2 is fixed to the bumper, and the second cylinder block 5 is fixed to the vehicle body; in addition, due to the existence of the buffer structure in this application, in order to avoid the bumper shaking during actual use, during actual installation, other parts of the bumper need to have fixed points connected to the front of the vehicle. These fixed points only serve to connect the bumper to the front of the vehicle without shaking and do not have the actual effect of bearing impact.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the present invention can still be modified or equivalently replaced. Any modification or partial replacement without departing from the spirit and scope of the present invention shall be covered by the scope of the claims of the present invention.

Claims

1. A vehicle front bumper buffer structure, characterized in that: include: A first cylinder body (1), the first cylinder body (1) being installed between the front bumper and the vehicle body; A movable rod (2), the movable rod (2) being arranged in the first cylinder body (1), the two ends of the movable rod (2) respectively extending outside the first cylinder body (1), and one end thereof being suspended to form a suspended portion; A plurality of first elastic parts (3), the plurality of first elastic parts (3) are evenly distributed in the circumferential direction in the first cylinder (1), the first elastic part (3) having two ends, a first supporting part and a second supporting part, the first supporting part and the second supporting part both being located between the two ends; wherein the two ends of the first elastic part (3) are respectively fixed in the movable rod (2) and the first cylinder (1), the first supporting part is slidably arranged on the inner wall of the first cylinder (1), and the second supporting part has at least two states: When in the first state, there is a gap between the second supporting portion and the outer wall of the movable rod (2); When in the second state, the second support portion is tightly pressed against the movable rod (2); A first contact point is formed at a position where the first support portion contacts the inner wall of the first cylinder (1), and a second contact point is formed at a position where the second support portion contacts the movable rod (2), and the first contact point and the second contact point are distributed alternately.

2. A vehicle front bumper buffer structure according to claim 1, characterized in that: An end of the first cylinder (1) away from the suspension portion of the movable rod (2) is connected to the movable rod (2) via a second elastic portion (10); the second elastic portion (10) is an annular elastic body; an outer annular wall of the second elastic portion (10) is fixedly connected to the first cylinder (1); and an inner annular wall of the second elastic portion (10) is slidably connected to the movable rod (2).

3. The vehicle front bumper buffer structure according to claim 1, characterized in that: The invention also comprises a guide assembly (4), wherein the guide assembly (4) comprises a guide slider (401) and a guide groove (402), wherein the first support portion is slidably arranged on the inner wall of the first cylinder body (1) via the guide slider (401), and the inner wall of the first cylinder body (1) is provided with a guide groove (402) for the guide slider (401) to slide.

4. The vehicle front bumper buffer structure according to claim 1, characterized in that: A second cylinder (5) is fixedly arranged on the first cylinder (1), the suspension portion of the movable rod (2) extends into the second cylinder (5), and an inner lining (6) and a rotating ball (7) are arranged inside the second cylinder (5); The lining member (6) is fixed in the second cylinder body (5), the rotating ball (7) is rotatably arranged in the lining member (6), and a rotating groove for the rotating ball (7) to rotate is provided on the lining member (6); The rotating ball (7) is provided with a slide groove (701), the axis of the slide groove (701) passes through the center of the rotating ball (7), and the movable rod (2) is slidably arranged in the slide groove (701).

5. The vehicle front bumper buffer structure according to claim 4, characterized in that: An anti-slip block (8) is slidably arranged in the slide groove (701), the anti-slip block (8) is fixed on the movable rod (2), the diameter of the anti-slip block (8) is larger than the rod diameter of the movable rod (2), and a limiting block (11) is fixed on the slide groove (701).

6. The vehicle front bumper buffer structure according to claim 5, characterized in that: A spring (9) is arranged in the slide groove (701), one end of the spring (9) is connected to the end of the anti-slip block (8), and the other end of the spring (9) is connected to the bottom of the slide groove (701).

7. The vehicle front bumper buffer structure according to claim 1, characterized in that: The cross section of the first elastic portion (3) is rectangular.

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