Buffering structure of front bumper of vehicle body

Abstract

The invention discloses a vehicle body front bumper buffer structure, which belongs to the technical field of bumpers, and comprises a first cylinder body, a movable rod is arranged in the first cylinder body, the movable rod can axially and radially move in the first cylinder body, and a plurality of first elastic parts are uniformly distributed in the first cylinder body in the circumferential direction; the second elastic part is provided with two end parts, a first supporting part and a second supporting part, the first supporting part and the second supporting part are both located between the two end parts, and the two end parts of the second elastic part are fixed in the movable rod and the first cylinder body correspondingly; through mutual cooperation of buffering mechanisms of the first elastic part in the axial direction and the radial direction, all-directional buffering is provided for the movable rod, in the complex movement process, the movable rod can be subjected to axial and radial impact force at the same time, at the moment, the first elastic part can play a role in the two directions at the same time, and therefore the buffering effect of the movable rod is improved. And the influence of impact and vibration on the vehicle is effectively reduced.

Description

Technical Field

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

[0002] A buffer is installed on the front bumper of a transmission electric tricycle. When the bumper is hit, the buffer plays a buffering role. For example, the electric tricycle frame disclosed in a Chinese patent (CN210852751U) adopts the following scheme: it includes a frame main beam, a load-bearing beam is installed on the frame main beam, a support column is provided between the frame main beam and the load-bearing beam, a horizontally arranged buffer rod is movably installed on one end of the frame main beam, one end of the buffer rod is rotatably connected to the bumper, a buffer groove is provided on the frame main beam, a guide rod is provided in the buffer groove, and a movable plate and a spring are provided on the sliding sleeve of the guide rod.

[0003] The disadvantages of the above-mentioned prior art are: the buffering direction is single, and protection is only provided for impacts from one direction (such as forward). For impacts from other directions (such as side or rear), the bumper may not provide sufficient buffering effect, thereby reducing the overall safety of the vehicle.

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

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

[0006] In order to achieve the above-mentioned object, the present invention adopts the following technical solution: a front bumper buffer structure of a vehicle body, comprising: A first cylinder body, the first cylinder body is installed between the front bumper and the vehicle body; A movable rod, the movable rod is arranged in the first cylinder body, both ends of the movable rod extend outside the first cylinder body respectively, and one end of the movable rod is suspended to form a suspension part; A plurality of first elastic parts, the plurality of first elastic parts are evenly distributed in the first cylinder body in the circumferential direction, the first elastic part has two ends, a first supporting part and a second supporting part, and the first supporting part and the second supporting part are both located between the two ends; wherein the two ends of the first elastic part are respectively fixed to the movable rod and the first cylinder body, the first supporting part is slidably arranged on the inner wall of the first cylinder body, 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; When in the second state, the second supporting portion is pressed against the movable rod.

[0007] Preferably, one end of the first cylinder away from the movable rod suspension portion is connected to the movable rod via a second elastic portion, the second elastic portion is an annular elastic body, the outer annular wall of the second elastic portion is fixedly connected to the first cylinder, and the inner annular wall of the second elastic portion is slidably connected to the movable rod.

[0008] Preferably, a first contact point is formed at a position where the first support portion contacts the inner wall of the first cylinder body, and a second contact point is formed at a position where the second support portion contacts the movable rod, and the first contact point and the second contact point are alternately distributed.

[0009] Preferably, a vehicle front bumper buffer structure also includes a guide assembly, the guide assembly includes a guide slider and a guide groove, the first support portion is slidably arranged on the inner wall of the first cylinder body through the guide slider, and the inner wall of the first cylinder body is provided with a guide groove for the guide slider to slide.

[0010] Preferably, a second cylinder is fixedly arranged on the first cylinder, the suspension portion of the movable rod extends into the second cylinder, and a lining member and a rotating ball are arranged inside the second cylinder; The lining member is fixed in the second cylinder body, the rotating ball is rotatably arranged in the lining member, and a rotating groove for the rotating ball to rotate is provided on the lining member; A sliding groove is arranged on the rotating ball, the axis of the sliding groove passes through the center of the rotating ball, and the movable rod is slidably arranged in the sliding groove.

[0011] Preferably, an anti-slip block is slidably arranged in the slide groove, the anti-slip block is fixed on the movable rod, the diameter of the anti-slip block is larger than the rod diameter of the movable rod, and a limit block is fixed on the slide groove.

[0012] Preferably, a spring is arranged in the slide groove, one end of the spring is connected to the end of the anti-slip block, and the other end of the spring is connected to the bottom of the slide groove.

[0013] Preferably, the cross section of the first elastic portion is rectangular.

[0014] Compared with existing technologies: The present invention provides all-round buffering for the movable rod through the mutual cooperation of the buffering mechanisms of the first elastic part in the axial and radial directions. During complex movement, the movable rod may be subjected to axial and radial impact forces at the same time. At this time, the first elastic part can play a role in these two directions at the same time, effectively reducing the impact of shock and vibration on the vehicle.

[0015] When the movable rod moves axially, the movable rod pushes the upper end of the first elastic part to move downward. At this time, the movable rod compresses the first elastic part to move, and the compression and deformation of the first elastic part generates buffering potential energy. The buffering potential energy generated by the compression and deformation of the first elastic part is used to buffer the movement of the movable rod axially, thereby forming a preliminary buffering effect. When the movable rod produces a large axial movement, the compression stroke of the first elastic part is increased, and the second support part will be pressed against the side wall of the movable rod after being displaced close to the movable rod to form a support point. At this time, the deformation difficulty of the first elastic part increases, forming a stronger buffer, thereby further improving the buffering effect.

[0016] When the movable rod is radially deflected, the first elastic part pushed by the movable rod can still deform to generate buffering potential energy, so that when the movable rod is subjected to radial impact force, the first elastic part can generate buffering in the radial direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional view of the present invention.

[0018] Figure 2 The force diagram of the movable rod and the buffer body of the present invention is shown in FIG. Figure 1 .

[0019] Figure 3 The force diagram of the movable rod and the buffer body of the present invention is shown in FIG. Figure 2 .

[0020] Figure 4 This is a schematic diagram of the buffer body distribution of the present invention.

[0021] Figure 5 It is a schematic diagram of the connection between the present invention and the bumper.

[0022] Figure 6 It is a cross-sectional view of the first cylinder body, the first elastic part and the guide assembly of the present invention.

[0023] Figure 7 It is a cross-sectional exploded view of the movable rod, the rotating ball and the anti-dropping block of the present invention.

[0024] In the figure: 1. first cylinder body, 2. movable rod, 3. first elastic part, 4. guide assembly, 401. guide slider, 402. guide groove, 5. second cylinder body, 6. lining member, 7. rotating ball, 701. slide groove, 8. anti-slip block, 9. spring, 10. second elastic part, 11. limit block. DETAILED DESCRIPTION

[0025] The present invention is described below with specific embodiments, but they are not intended to be limiting of the invention.

[0026] Embodiment 1 like Figure 1-Figure 7As shown, in this embodiment, a front bumper buffer structure of a vehicle body is provided, including a first cylinder body 1, which is installed between the front bumper and the vehicle body; the movable rod 2 is arranged in the first cylinder body 1, and the two ends of the movable rod 2 extend outside the first cylinder body 1 respectively; wherein, one end of the movable rod 2 extending outside the first cylinder body 1 is suspended; a plurality of the first elastic parts 3 are evenly distributed in the circumferential direction of the first cylinder body 1, the number of the first elastic parts 3 can be six, and the six first elastic parts 3 are evenly distributed around the movable rod 2 to ensure that effective buffering effect can be provided in any direction, the first elastic part 3 has two ends, a first supporting part and a second supporting part, and the first supporting part and the second supporting part are both 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 body 1, the first supporting part is slidably arranged on the inner wall of the first cylinder body 1, and the second supporting part has at least two states.

[0027] like Figure 1 As shown, when in the first state, the first elastic portion 3 is in an extended state, at which time, the second supporting portion does not contact the outer wall of the movable rod 2, so that there is a gap between the second supporting portion and the outer wall of the movable rod 2; like Figure 2 As shown, when in the second state, the first elastic portion 3 is in a state of compression deformation. After the first elastic portion 3 is compressed and deformed, the second support portion slides toward one side of the movable rod 2, so that the second support portion can be pressed against the movable rod 2.

[0028] The first support portion contacts the inner wall of the first cylinder 1 to form a first contact point, and the second support portion contacts the movable rod 2 to form a second contact point. The first contact point and the second contact point are alternately distributed. The first elastic portion 3 is a multi-section arc structure, and the cross section of the first elastic portion 3 is a rectangle; for example Figure 1 As shown, the number of the first contact points is two, and the number of the second contact point is one.

[0029] Combination Figure 1-Figure 3 As shown, the deformation of the movable rod 2 in the axial and radial directions due to the buffering effect; Axial cushioning: like Figure 2As shown, when the movable rod 2 generates an axial movement in the direction of the arrow, the movable rod 2 pushes the upper end of the first elastic part 3 to move downward. At this time, the movable rod 2 compresses the first elastic part 3 to move, and the compression deformation of the first elastic part 3 generates buffering potential energy. The two adjacent first support parts gradually approach each other, and at the same time, the second support part moves close to the movable rod 2. In this process, the compression deformation of the first elastic part 3 is used to generate buffering potential energy to axially buffer the movement of the movable rod 2, forming a preliminary buffering effect; when the movable rod 2 generates a large axial movement in the direction of the arrow, the movable rod 2 pushes the upper end of the first elastic part 3 to move downward, so that the compression stroke of the first elastic part 3 increases, and the second support part will be pressed against the side wall of the movable rod 2 after being displaced close to the movable rod 2, forming a supporting 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 buffering effect; in addition, after the supporting point is formed, a certain friction force is also generated on the movable rod 2, which can also further increase the buffering effect to a certain extent.

[0030] In addition, it should be noted that the sliding of the second support portion is achieved through a guide groove 402 provided on the first cylinder body 1 (see the following content for details), and the length setting of the guide groove 402 needs to be determined according to the deformation length of the first elastic portion 3, that is, it is necessary to ensure that when the second support portion is pressed against the movable rod 2, the first support portion can still move a certain distance in the guide groove 402.

[0031] Radial Cushioning: like Figure 3 As shown, when the movable rod 2 produces radial movement in the direction of the arrow, the movable rod 2 pushes the first elastic part 3 on the left side to deform, and at the same time the first elastic part 3 on the right side also deforms. At this time, the first elastic part 3 on the left side tends to compress, and the first elastic part 3 on the right side tends to stretch, so that when the movable rod 2 is subjected to radial impact force, the first elastic part 3 can generate radial buffering.

[0032] The comprehensive effect of buffering: The buffering mechanisms of the first elastic part 3 in the axial and radial directions cooperate with each other to provide all-round protection for the movable rod 2. During complex movement, the movable rod 2 may be subjected to axial and radial impact forces at the same time. At this time, the first elastic part 3 can play a role in these two directions at the same time, effectively reducing the impact of shock and vibration on the system.

[0033] like Figure 6As shown, in order to ensure that the first support portion slides axially along the first cylinder body 1, a vehicle front bumper buffer structure further includes a guide assembly 4, the guide assembly 4 includes a guide slider 401 and a guide groove 402, the guide slider 401 is fixed on the first support portion of the first elastic portion 3, and the guide slider 401 is arranged in a T-shape; the guide groove 402 is provided on the inner wall of the first cylinder body 1, the length direction of the guide groove 402 is parallel to the axial direction of the first cylinder body 1, and the guide slider 401 is slidably connected inside the guide groove 402; Since the guide slider 401 is fixed on the first supporting portion of the first elastic portion 3, its shape is designed to be T-shaped (in order to facilitate the installation of the guide slider 401 into the guide groove 402, the T-shaped guide slider 401 is formed by splicing two L-shaped blocks, and the two L-shaped blocks are separately placed in the guide groove 402, and the two L-shaped blocks are spliced ​​in the guide groove 402 to facilitate the installation of the guide slider 401). The T-shaped structure enables the guide slider 401 to be firmly embedded in the guide groove 402, effectively preventing deviation or shaking during the sliding process; On the other hand, the guide groove 402 is opened on the inner wall of the first cylinder body 1, and its length direction is parallel to the axial direction of the first cylinder body 1, ensuring that when the movable rod 2 moves, the first support part can stably slide axially along the trajectory of the guide groove 402. The cooperation between the guide groove 402 and the guide slider 401 can ensure that the first support part is always in contact with the inner wall of the first cylinder body 1, avoiding separation of the first support part from the inner wall of the first cylinder body 1, and the size and shape of the guide groove 402 match the guide slider 401, ensuring that the guide slider 401 can slide smoothly inside the guide groove 402.

[0034] Embodiment 2 like Figure 1-Figure 7 As shown, on the basis of the first embodiment, specifically, a second cylinder body 5 is fixedly arranged on the first cylinder body 1, one end of the movable rod 2 suspendedly arranged extends into the second cylinder body 5, a lining member 6 and a rotating ball 7 are arranged inside the second cylinder body 5, the lining member 6 fills the inner cavity of the entire second cylinder body 5, and a spherical rotating groove is provided inside the lining member 6, and the material of the lining member 6 has good wear resistance and pressure resistance; the rotating ball 7 is rotatably connected inside the rotating groove (in order to facilitate the installation of the rotating ball 7 in the rotating groove, the lining member 6 is composed of two parts, the upper and lower parts, the outer contour of the rotating ball 7 is matched with the inner contour of the rotating groove, and a sliding groove 701 is provided on the rotating ball 7, the axis of the sliding groove 701 coincides with the ball center of the rotating ball 7, and one end of the sliding groove 701 opens toward the inner cavity of the first cylinder body 1; wherein, the end of the movable rod 2 extends into the inside of the sliding groove 701, and when the movable rod 2 is subjected to radial force, the end of the movable rod 2 inserted into the sliding groove 701 can swing with the rotating ball 7, that is, swing around the ball center of the rotating ball 7.

[0035] When the front bumper of the electric tricycle is subjected to external impact, the movable rod 2 will move axially and radially. Inside the first cylinder body 1, the first elastic part 3 will be deformed to cushion the movable rod 2. At the same time, the end of the movable rod 2 moves in the slide groove 701, driving the rotating ball 7 to rotate in the rotating groove of the 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.

[0036] like Figure 7 As shown, in order to prevent the end of the movable rod 2 from falling out of the slide groove 701, an anti-falling block 8 is fixed to one end of the movable rod 2 extending to the slide groove 701. The diameter of the anti-falling block 8 is larger than the rod diameter of the movable rod 2, and the circumferential surface of the anti-falling block 8 is slidably connected to the groove wall of the slide groove 701. A limiting block 11 is fixed on the slide groove 701. The anti-falling block 8 can be limited in the slide groove 701 by the limiting block 11, thereby ensuring that the suspended part of the movable rod 2 will not fall out of the slide groove 701.

[0037] A spring 9 is arranged between the bottom of the slide groove 701 and the anti-slip 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-slip block 8, and the other end of the spring 9 is connected to the bottom of the slide groove 701. When the front bumper of the electric tricycle is subjected to external impact, the movable rod 2 will move toward one end of the slide groove 701, causing the spring 9 to deform.

[0038] Embodiment 3 On the basis of the above embodiment, a second elastic part 10 is provided at the end of the first cylinder body 1, and one end of the movable rod 2 passes through the first cylinder body 1 from the inner circle of the second elastic part 10. The second elastic part 10 can achieve sealing on the basis of being able to play a certain buffering role, so that there is a certain sealing effect between the inner circle of the second elastic part 10 and the movable rod 2. The material of the second elastic part 10 can be rubber.

[0039] Furthermore, the buffer structure in the present application is mainly used at the connection between the vehicle body and the bumper, such as Figure 5 As shown, when there is no buffer structure of the present application, the two ends of the bumper will be directly connected to the vehicle body, and will directly act on the vehicle body during buffering; when connected, the movable rod 2 is fixed to the bumper, and the second cylinder body 5 is fixed to the vehicle body; in addition, due to the existence of the buffer structure in the present application, in order to avoid shaking of the bumper during actual use, during actual installation, other parts of the bumper need to have fixed points connected to the front of the vehicle, and these fixed points only serve to connect the bumper to the front of the vehicle to prevent it from shaking, and do not have the actual effect of bearing impact.

[0040] 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 replaced by equivalents. Any modification or partial replacement that does not depart from the spirit and scope of the present invention should be included in 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 supporting portion is pressed tightly against the movable rod (2).

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: 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.

4. 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.

5. 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).

6. The vehicle front bumper buffer structure according to claim 5, 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).

7. The vehicle front bumper buffer structure according to claim 6, 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).

8. 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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