Frame suspension structure

Abstract

The invention discloses a frame suspension structure, which belongs to the technical field of vehicle damping, and comprises a plate spring, a fixed seat, two hinge seats, two movable sleeves and a first elastic piece, the hinge seats are fixed on a frame, and the movable sleeves sleeve the plate spring; the two ends of the first elastic piece are hinged to the two movable sleeves respectively, and the middle of the first elastic piece is located between the lug plate and the rear axle. The guide column is fixed on the frame, and a movable seat is mounted on the guide column in a sliding manner. The middle of the first elastic piece is restrained between the lug plate and the rear axle, so that the two movable sleeves arranged on the plate spring in a sleeving mode are elastically restrained by the first elastic piece and symmetrically move on the plate spring, and when jolting occurs, under the restraint of the guide column, the movable base, the second connecting plate, the movable sleeves and the first elastic piece, the movable sleeves can move on the plate spring in a sleeving mode. And the frame basically does not move in the horizontal direction, so that the buffering effect of the plate spring can be better exerted, and cargoes carried on the frame are more stable.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle shock absorption, and particularly relates to a frame suspension structure. Background Art

[0002] In the existing electric tricycle, the rear axle and the frame are generally connected by a leaf spring. The leaf spring is fixed on the bridge tube of the rear axle through a U-bolt and a pressing plate. The main function of the leaf spring is to buffer the impact received by the frame. When the leaf spring elastically deforms, it will transform from a bent state to a straight state. Although the leaf spring generally will not be completely flattened, the distance between the two end eyelets of the leaf spring will also change due to the deformation of the leaf spring. If the two eyelets are directly hinged to the frame, a large impact will be generated on the hinge when the leaf spring deforms, which makes the hinge prone to fracture.

[0003] The current solution is to hinge one eyelet to the frame and hinge a connecting plate to the other eyelet, and then hinge the connecting plate to the frame. Although the change in the distance between the two eyelets can be adapted through the connecting plate, when the leaf spring deforms, the rear axle will displace in the horizontal direction, and the rear axle and the frame will shake in the front-rear direction. Summary of the Invention

[0004] Aiming at the above existing technical deficiencies, the purpose of the present invention is to provide a frame suspension structure that can reduce or avoid the shaking of the frame in the front-rear direction during buffering.

[0005] To solve the above technical problems, the present invention adopts the following technical solutions: The present invention provides a frame suspension structure, including:

[0006] A leaf spring, with eyelets provided at both ends of the leaf spring, and a positioning hole is provided in the middle of the leaf spring;

[0007] A fixed seat, which is fixed on the rear axle. A positioning bolt passing through the positioning hole is provided on the fixed seat, and ear plates are fixed on both sides of the fixed seat;

[0008] Two hinge seats, which are fixed on the frame. The two hinge seats are respectively hinged to two first connecting plates, and the ends of the two first connecting plates away from the hinge seats are respectively hinged to the two eyelets;

[0009] Two movable sleeves, which are sleeved on the leaf spring;

[0010] A first elastic member, with both ends of the first elastic member respectively hinged to the two movable sleeves, and the middle of the first elastic member is located between the ear plate and the rear axle;

[0011] A guide post, which is fixed on the frame. A movable seat is slidably installed on the guide post. A second connecting plate is hinged to the movable sleeve, and the end of the second connecting plate away from the movable sleeve is hinged to the movable seat.

[0012] Preferably, the first elastic member includes:

[0013] A first arched portion that abuts against one side of the ear plate facing the rear axle;

[0014] Two second arched portions that are respectively connected to both ends of the first arched portion and abut against the rear axle;

[0015] Two arc portions that are respectively connected to one ends of the two second arched portions away from the first arched portion, and the movable sleeve is hinged to the arc portions.

[0016] Preferably, the movable seat includes:

[0017] Two side plates that are parallel;

[0018] Two cross plates that are parallel, both ends of the cross plates are respectively fixedly connected to the two side plates, the cross plates and the side plates enclose a square structure, and the square structure is sleeved on the guide post;

[0019] Two roller shafts that are rotatably installed at both ends of the side plates.

[0020] Preferably, a second elastic member is hinged on the hinge seat, the second elastic member is arc-shaped, the middle portion of the second elastic member abuts against the vehicle frame, and one end of the second elastic member away from the hinge seat passes through the gap between the roller shaft and the cross plate.

[0021] Preferably, when the distance between the movable seat and the vehicle frame is reduced, the roller shaft elastically deforms the second elastic member.

[0022] Preferably, a wear-resistant lining is fixed on one side of the square structure close to the guide post.

[0023] Preferably, the leaf spring includes a first leaf spring, a second leaf spring, a third leaf spring, and a fourth leaf spring stacked in sequence, the length of the third leaf spring is less than that of the second leaf spring, the movable sleeve includes a sleeve shell and two pressure rollers rotatably installed in the sleeve shell, the first leaf spring and the second leaf spring are located between the two pressure rollers, and the end of the third leaf spring can abut against the pressure roller.

[0024] Preferably, a limit bolt is installed on the ear plate by threading, and the first elastic member is located between the fixed seat and the limit bolt.

[0025] Preferably, there are two first elastic members in total, and the two first elastic members are symmetrically arranged on both sides of the leaf spring.

[0026] The beneficial effects of the present invention are as follows: The middle part of the first elastic member provided in the present invention is constrained between the ear plate and the rear axle. Therefore, the two movable sleeves sleeved on the leaf spring are elastically constrained by the first elastic member and symmetrically move on the leaf spring. The present invention is provided with a guide post, a movable seat and a second connecting plate. When encountering bumps, under the constraints of the guide post, the movable seat, the second connecting plate, the movable sleeve and the first elastic member, the vehicle frame basically does not move horizontally, so that the buffering effect of the leaf spring can be better exerted, making the goods carried on the vehicle frame more stable; The second elastic member further provided in the present invention forms a multi-stage buffering effect with the leaf spring and the first elastic member. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0028] Figure 1 It is a perspective view of a vehicle frame suspension structure provided by an embodiment of the present invention.

[0029] Figure 2 is Figure 1 a partial enlarged view of A in

[0030] Figure 3 It is a front view of the present invention.

[0031] Figure 4 is Figure 3 a partial enlarged view of B in

[0032] Figure 5 It is a side view of the present invention.

[0033] Figure 6 It is a top view of the present invention.

[0034] Figure 7 is Figure 6 a cross-sectional view taken along the line A-A in

[0035] Figure 8 is Figure 7 a partial enlarged view of C in

[0036] Figure 9 is Figure 8 a schematic diagram of the change of the position shown when the vehicle frame descends.

[0037] Description of the reference numerals:

[0038] 1. Leaf spring, 2. Eye, 3. Positioning hole, 4. Fixed seat, 5. Positioning bolt, 6. Hinge seat, 7. Frame, 8. First connecting plate, 9. Movable sleeve, 10. First elastic member, 11. Guide post, 12. Movable seat, 13. Second connecting plate, 14. Rear axle, 15. First arched portion, 16. Second arched portion, 17. Arc portion, 18. Side plate, 19. Cross plate, 20. Roller shaft, 21. Second elastic member, 22. First spring plate, 23. Second spring plate, 24. Third spring plate, 25. Fourth spring plate, 26. Sleeve housing, 27. Pressing roller, 28. Limit bolt, 29. Wear-resistant lining plate, 30. Ear plate. Detailed implementation manner

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0040] Embodiment 1:

[0041] As Figures 1 to 9 shown, Embodiment 1 of the present invention provides a frame suspension structure for connecting the rear axle 14 and the frame 7, including a fixed seat 4 fixed on the rear axle 14, a leaf spring 1 arranged on the fixed seat 4, and two hinge seats 6 fixed on the lower surface of the frame 7. The leaf spring 1 is a multi-layer structure, including a first spring plate 22, a second spring plate 23, a third spring plate 24, and a fourth spring plate 25 stacked in sequence from top to bottom, and the lengths are gradually shortened. As Figure 3 shown, the length of the third spring plate 24 is less than the length of the second spring plate 23.

[0042] The rear axle 14 generally includes structures such as a differential housing, a bridge tube, and a transmission. The leaf spring 1 is arranged on the bridge tube. Therefore, the rear axle 14 is simplified to a circular tube in the accompanying drawings. The fixed seat 4 is welded to the bridge tube of the rear axle 14. A positioning hole 3 is opened on the fixed seat 4, and a corresponding positioning hole 3 is opened in the middle of the leaf spring 1. A positioning bolt 5 passing through the positioning hole 3 is used to install the leaf spring 1 on the fixed seat 4.

[0043] At both ends of the first spring plate 22, there are provided coiled ears 2. A first connecting plate 8 is hinged on the hinge seat 6. One end of each of the two first connecting plates 8 away from the corresponding hinge seat 6 is respectively hinged to the two coiled ears 2. Through the above arrangement, the weight of the vehicle frame 7 is transmitted to the leaf spring 1 through the hinge seat 6 and the first connecting plate 8. Since the first connecting plate 8 can swing around the hinge axis, it can adapt to the change in the distance between the two coiled ears 2 of the leaf spring 1. In order to further stabilize the position of the vehicle frame 7, so that when the leaf spring 1 undergoes elastic deformation, the vehicle frame 7 mainly moves up and down without significant horizontal shaking, the present invention further designs a guide post 11 and a first elastic member 10.

[0044] As Figure 1 and Figure 5 shown, on both sides of the fixed seat 4, there are symmetrically fixed ear plates 30. On both sides of the leaf spring 1, there are symmetrically arranged first elastic members 10. The middle part of the first elastic member 10 is located between the ear plate 30 and the rear axle 14. At the same time, a limit bolt 28 is threadedly installed on the ear plate 30, and the first elastic member 10 is located between the fixed seat 4 and the limit bolt 28. On the leaf spring 1, there are also symmetrically sleeved with two movable sleeves 9. As Figure 7 shown, the movable sleeve 9 includes two pressure rollers 27 respectively located on the upper and lower sides of the leaf spring 1 and a sleeve housing 26 for maintaining the distance between the two pressure rollers 27. The two pressure rollers 27 are rotatably installed on the sleeve housing 26. Specifically, the distance between the two pressure rollers 27 can only accommodate the thickness of the first spring plate 22 and the second spring plate 23, that is, the movable sleeve 9 is sleeved on the first spring plate 22 and the second spring plate 23, and the movable sleeve 9 can only move between the coiled ear 2 and the third spring plate 24. When the pressure roller 27 moves towards the third spring plate 24, the end of the third spring plate 24 can abut against the pressure roller 27.

[0045] As Figure 3 shown, both ends of the first elastic member 10 are respectively hinged on the two movable sleeves 9. The guide post 11 is fixed on the vehicle frame 7. The guide post 11 is located between the two hinge seats 6 and is equidistant from the two hinge seats 6. A movable seat 12 is slidably installed on the guide post 11. On the movable sleeve 9, there are symmetrically hinged second connecting plates 13. One end of each of the two second connecting plates 13 away from the movable sleeve 9 is symmetrically hinged on the movable seat 12. Since the middle part of the first elastic member 10 is constrained between the ear plate 30 and the rear axle 14, the two movable sleeves 9 are elastically constrained by the first elastic member 10 and have a tendency to symmetrically move closer to the middle. Due to the arrangement of the guide post 11, the movable seat 12 and the second connecting plates 13, when there is a bump, the vehicle frame 7 basically does not move horizontally, so that the buffering effect of the leaf spring 1 can be better exerted, making the goods carried on the vehicle frame 7 more stable.

[0046] Embodiment Two:

[0047] On the basis of Embodiment One, as Figure 3 and Figure 4As shown in the figure, the first elastic member 10 of the present invention includes a first arched portion 15, two second arched portions 16, and two arc-shaped portions 17. Among them, the first arched portion 15 abuts against one side of the ear plate 30 facing the rear axle 14; and the two second arched portions 16 are respectively connected to both ends of the first arched portion 15 and abut against the rear axle 14. The movable sleeve 9 is hinged to one end of the arc-shaped portion 17, and the other end of the arc-shaped portion 17 is connected to the second arched portion 16. In actual manufacturing, the first elastic member 10 is processed from an elastic plate. The first elastic member 10, the ear plate 30, and the movable sleeve 9 cooperate to fix the leaf spring 1 on the fixed seat 4.

[0048] When the vehicle frame 7 moves downward, the leaf spring 1 will deform from an arc shape to a straight shape, which increases the distance between the two coiled ears 2. Similarly, the distance between both ends of the third spring plate 24 will also increase, which increases the distance between the two movable sleeves 9. The two ends of the first elastic member 10 are pulled by the movable sleeves 9, resulting in elastic deformation and an increase in the distance. In this way, the first arched portion 15 will receive an upward pulling force, thereby increasing the abutting force with the ear plate 30, firmly fixing the leaf spring 1 on the fixed seat 4, and the elastic deformation of the first elastic member 10 also plays a certain buffering role.

[0049] Embodiment Three:

[0050] Based on Embodiment One and Embodiment Two, as Figure 1 、 Figure 7 and Figure 8 shown in the figure, the movable seat 12 provided by the present invention includes two parallel side plates 18 and two parallel cross plates 19. The cross plates 19 are perpendicular to the side plates 18, and both ends of the cross plates 19 are fixedly connected to the two side plates 18 respectively. In this way, the cross plates 19 and the side plates 18 cooperate to form a square frame structure, and the guide post 11 passes through the square frame structure to achieve the sliding fit between the movable seat 12 and the guide post 11. In order to reduce the wear of the sliding friction between the movable seat 12 and the guide post 11, a wear-resistant lining plate 29 is fixed on one side of the square frame structure close to the guide post 11.

[0051] Two roller shafts 20 are rotatably installed between the side plates 18, and the two roller shafts 20 are symmetrically arranged on the side plates 18. One end of the second connecting plate 13 is rotatably installed on the roller shaft 20.

[0052] Through the above settings, when there is a bump, the vehicle frame 7 will vibrate up and down. During this process, the guide post 11 and the movable seat 12 slide relative to each other, and the sliding friction generates a damping effect, thereby accelerating the elimination of vibration and making the vehicle frame 7 more stable.

[0053] Embodiment Four:

[0054] Based on the above embodiments, the present invention also hinges a second elastic member 21 on the hinge seat 6. As Figures 7 to 9As shown, the second elastic member 21 is arc-shaped. The middle part of the second elastic member 21 abuts against the upper and lower sides of the vehicle frame 7, and one end of the second elastic member 21 away from the hinge seat 6 passes through the gap between the roller shaft 20 and the cross plate 19. The second elastic member 21 has a tendency to push the roller shaft 20 downward. When the vehicle frame 7 moves downward, the distance between the movable seat 12 and the vehicle frame 7 shrinks, the roller shaft 20 moves toward the vehicle frame 7, compressing the second elastic member 21 and causing elastic deformation of the second elastic member 21. By providing the first elastic member 10 and the second elastic member 21, a multi-stage buffering and shock-absorbing effect can be achieved.

[0055] As a possible implementation, a through groove may be formed in the cross plate 19. When the second elastic member 21 is pressed by the roller shaft 20 to a certain extent, the second elastic member 21 will squeeze against the wear-resistant lining plate 29 through the through groove, increasing the friction between the wear-resistant lining plate 29 and the guide post 11, thereby further improving the damping effect and consuming vibration.

[0056] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these changes and modifications.

Claims

1. A frame suspension structure, characterized in that: include: A leaf spring (1), wherein both ends of the leaf spring (1) are provided with ears (2), and a positioning hole (3) is opened in the middle of the leaf spring (1); A fixing seat (4), the fixing seat (4) being fixed on the rear axle (14), the fixing seat (4) being provided with a positioning bolt (5) passing through the positioning hole (3), and ear plates (30) being fixed on both sides of the fixing seat (4); Two hinged seats (6), the hinged seats (6) are fixed on the vehicle frame (7), the two hinged seats (6) are respectively hinged to two first connecting plates (8), and the ends of the two first connecting plates (8) away from the hinged seats (6) are respectively hinged to two rolled ears (2); Two movable sleeves (9), wherein the movable sleeves (9) are sleeved on the leaf spring (1); A first elastic member (10), wherein two ends of the first elastic member (10) are respectively hinged on two movable sleeves (9), and a middle portion of the first elastic member (10) is located between the ear plate (30) and the rear axle (14); A guide column (11), wherein the guide column (11) is fixed on the vehicle frame (7), a movable seat (12) is slidably mounted on the guide column (11), a second connecting plate (13) is hinged on the movable sleeve (9), and an end of the second connecting plate (13) away from the movable sleeve (9) is hinged on the movable seat (12).

2. A vehicle frame suspension structure as claimed in claim 1, characterized in that: The first elastic member (10) comprises: A first arched portion (15), the first arched portion (15) abutting against a side of the ear plate (30) facing the rear bridge (14); Two second arched portions (16), the two second arched portions (16) being respectively connected to two ends of the first arched portion (15) and resting against the rear bridge (14); Two arc-shaped portions (17), the two arc-shaped portions (17) are respectively connected to one end of the two second arched portions (16) away from the first arched portion (15), and the movable sleeve (9) is hinged on the arc-shaped portions (17).

3. A vehicle frame suspension structure as claimed in claim 1, characterized in that: The movable seat (12) comprises: Two side panels (18), the two side panels (18) are parallel; Two transverse plates (19), the two transverse plates (19) are parallel, the two ends of the transverse plates (19) are respectively fixedly connected to the two side plates (18), the transverse plates (19) and the side plates (18) form a square frame structure, and the square frame structure is sleeved on the guide column (11); Two roller shafts (20) are rotatably mounted on both ends of the side plate (18).

4. A vehicle frame suspension structure as claimed in claim 3, characterized in that: A second elastic member (21) is hinged on the hinge seat (6), the second elastic member (21) is arc-shaped, the middle part of the second elastic member (21) is against the frame (7), and the end of the second elastic member (21) away from the hinge seat (6) passes through the gap between the roller shaft (20) and the cross plate (19).

5. A frame suspension structure as claimed in claim 4, characterized in that: When the distance between the movable seat (12) and the vehicle frame (7) is reduced, the roller shaft (20) causes the second elastic member (21) to deform elastically.

6. A vehicle frame suspension structure as claimed in claim 3, characterized in that: A wear-resistant lining plate (29) is fixed on one side of the square frame structure close to the guide column (11).

7. A vehicle frame suspension structure as claimed in claim 1, characterized in that: The leaf spring (1) comprises a first spring plate (22), a second spring plate (23), a third spring plate (24) and a fourth spring plate (25) which are stacked in sequence, the length of the third spring plate (24) being shorter than the length of the second spring plate (23), the movable sleeve (9) comprising a sleeve shell (26) and two pressure rollers (27) rotatably mounted in the sleeve shell (26), the first spring plate (22) and the second spring plate (23) being located between the two pressure rollers (27), and the end of the third spring plate (24) being able to abut against the pressure roller (27).

8. A vehicle frame suspension structure as claimed in claim 1, characterized in that: A limiting bolt (28) is threadedly mounted on the ear plate (30), and the first elastic member (10) is located between the fixing seat (4) and the limiting bolt (28).

9. A vehicle frame suspension structure as claimed in claim 1, characterized in that: There are two first elastic members (10) in total, and the two first elastic members (10) are symmetrically arranged on both sides of the leaf spring (1).

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