Rear axle damping device and electric tricycle

Abstract

The utility model discloses a rear axle damping device and electric tricycle, wherein rear axle damping device includes frame and a plurality of damping mechanism, and the both sides of frame are provided with connecting assembly, and connecting assembly includes two lugs, and two lugs are arranged on frame at intervals, and the lug fixedly connected with supporting pipe, and the both sides of supporting pipe are connected with lug, and supporting pipe is in abutment with frame, damping mechanism and connecting assembly are one to one correspondence, and damping mechanism includes steel plate spring and two connecting frames, and connecting frame and lug are one to one correspondence, and connecting frame and lug are rotationally connected, and both ends of steel plate spring are rotationally connected in two connecting frames, wherein the middle part of steel plate spring is fixedly connected with rear axle, and the frame is connected with rear axle with limiting rod, and one end of limiting rod is hinged with frame, and the other end of limiting rod is hinged with rear axle. The utility model discloses rear axle damping device can improve the stress of limiting rod and lug, and improve the stability and reliability of connection.

Description

Technical Field

[0001] This utility model relates to the field of shock absorption mechanism technology, and in particular to a rear axle shock absorption device and an electric tricycle. Background Technology

[0002] In related technologies, the rear axle of electric tricycles typically uses leaf springs for shock absorption and is rotatably connected to the frame via a limiting rod, allowing the rear axle to dampen shocks while limiting its range of motion. In existing systems, the front end of the leaf spring is hinged to a hanger on the frame, and the rear end is also hinged to a hanger via a connector. When the leaf spring is compressed and bent, the connector can rotate on the frame, allowing the leaf spring to move the rear axle backward. However, the limiting rod connects the frame and the rear axle, causing a significant increase in stress at the connection points of the limiting rod and the connection between the hanger and the frame. This can even lead to failure of the limiting rod and hanger connection, affecting the reliability of the electric tricycle. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a rear axle shock absorption device that can improve the stress on the limiting rod and the lifting lug, thereby enhancing the stability and reliability of the connection.

[0004] This utility model also proposes an electric tricycle with the aforementioned rear axle shock absorption device.

[0005] According to a first aspect of the present invention, a rear axle shock absorber includes a vehicle frame and multiple shock absorber mechanisms. Connecting assemblies are provided on both sides of the vehicle frame. Each connecting assembly includes two lugs spaced apart on the vehicle frame. A support tube is fixedly connected to each lug, connecting both sides of the lug and abutting against the vehicle frame. Each shock absorber mechanism corresponds one-to-one with a connecting assembly. Each shock absorber mechanism includes a leaf spring and two connecting frames, each corresponding one-to-one with a lug. The connecting frames and lugs are rotatably connected. Both ends of the leaf spring are rotatably connected to the two connecting frames. The middle portion of the leaf spring is fixedly connected to the rear axle. A limiting rod connects the vehicle frame and the rear axle, with one end hinged to the vehicle frame and the other end hinged to the rear axle.

[0006] According to the embodiments of the present utility model, the rear axle shock absorber has at least the following beneficial effects: Connecting components are provided on both sides of the vehicle frame. Each connecting component includes two lugs, which are spaced apart on the vehicle frame. The shock absorber mechanism corresponds one-to-one with the connecting components. The shock absorber mechanism includes a leaf spring and two connecting frames. The connecting frames are rotatably connected to the lugs. By rotatably connecting both ends of the leaf spring to the two connecting frames respectively, when the leaf spring is compressed and deformed, the two ends of the leaf spring can drive the connecting frames to rotate on the lugs, allowing the leaf spring to bend upwards and deform, so that the two ends of the leaf spring can move synchronously. This allows the middle part of the leaf spring to be stable in the horizontal direction, thereby reducing the possibility of rearward displacement of the rear axle, preventing a sharp increase in force at the connection points of the limit rod, and reducing the possibility of connection failure between the limit rod and the vehicle frame. Furthermore, the connection between the two ends of the support tube and the two sides of the lugs enhances the structural strength of the support tube. The abutment between the support tube and the vehicle frame disperses the force of the leaf spring, improves the force on the lugs, and enhances the connection stability and reliability of the limit rod and the lugs.

[0007] According to some embodiments of the present invention, the connecting frame includes a first connecting rod, a second connecting rod, and two connecting plates. Both ends of the first connecting rod and the second connecting rod are connected to the two connecting plates, and the first connecting rod and the second connecting rod are respectively arranged at both ends of the connecting plates. The first connecting rod passes through the lifting lug, and the second connecting rod passes through the leaf spring.

[0008] According to some embodiments of the present invention, the lifting lug is fixedly connected with a rubber sleeve, and the first connecting rod passes through the rubber sleeve.

[0009] According to some embodiments of the present invention, both sides of the connecting plate are provided with bent portions, and the bent portions are arranged to protrude away from the lifting lug.

[0010] According to some embodiments of the present invention, the bent portion is inclinedly connected to the connecting plate so that the distance between the two connecting plates gradually increases from the middle to both sides.

[0011] According to some embodiments of the present invention, the support tube is square in shape, and the upper end face of the support tube is in contact with the vehicle frame.

[0012] According to some embodiments of the present invention, the leaf spring includes multiple leaf springs, which are stacked sequentially and fixedly connected by fasteners.

[0013] According to some embodiments of the present invention, a plurality of the connecting components are provided on the same side of the vehicle frame.

[0014] According to some embodiments of this utility model, the lifting lug is welded to the vehicle frame.

[0015] The electric tricycle according to a second aspect of the present invention includes the rear axle shock absorber according to the first aspect of the present invention.

[0016] The electric tricycle according to the embodiments of the present utility model has at least the following beneficial effects: by setting the rear axle shock absorption device of the first aspect of the present utility model, the stress on the connection parts at both ends of the limit rod and the lifting lug can be improved, the possibility of connection failure can be reduced, and the reliability of the electric tricycle can be improved.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0019] Figure 1 This is a schematic diagram of the rear axle shock absorber according to the first aspect of the present invention;

[0020] Figure 2 This is a schematic diagram of the lifting lug of the rear axle shock absorber according to the first aspect of this utility model;

[0021] Figure 3 This is a schematic diagram of the connecting frame of the rear axle shock absorber according to the first aspect of this utility model;

[0022] Figure 4 This is a schematic diagram of an electric tricycle according to a second aspect embodiment of the present invention.

[0023] Figure label:

[0024] Frame 100, connecting assembly 110, hanger 111, support tube 112, rubber sleeve 113;

[0025] Shock absorption mechanism 200, leaf spring 210, spring 211, connecting frame 220, connecting plate 221, bending part 222;

[0026] Rear axle 310, limit rod 320. Detailed Implementation

[0027] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0028] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0030] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0031] Understandably, referring to Figures 1 to 4 The rear axle shock absorber of the first aspect of this utility model includes a vehicle frame 100 and a plurality of shock absorber mechanisms 200. Connecting components 110 are provided on both sides of the vehicle frame 100. Each connecting component 110 includes two lugs 111, which are spaced apart on the vehicle frame 100. A support tube 112 is fixedly connected to each lug 111, and the support tube 112 connects to both sides of the lug 111 and abuts against the vehicle frame 100. The shock absorber mechanisms 200 correspond one-to-one with the connecting components 110, providing shock absorption. Mechanism 200 includes a leaf spring 210 and two connecting frames 220. The connecting frames 220 correspond one-to-one with the lifting lugs 111 and are rotatably connected to the lifting lugs 111. The two ends of the leaf spring 210 are rotatably connected to the two connecting frames 220 respectively. The middle part of the leaf spring 210 is fixedly connected to the rear axle 310. A limit rod 320 is connected between the frame 100 and the rear axle 310. One end of the limit rod 320 is hinged to the frame 100, and the other end of the limit rod 320 is hinged to the rear axle 310.

[0032] Both sides of the frame 100 are provided with connecting components 110. The connecting components 110 include two hangers 111, which are arranged at intervals on the frame 100. The shock absorption mechanism 200 corresponds one-to-one with the connecting components 110. The shock absorption mechanism 200 includes a leaf spring 210 and two connecting frames 220. The connecting frames 220 are rotatably connected to the hangers 111. The two ends of the leaf spring 210 are rotatably connected to the two connecting frames 220 respectively.

[0033] When the steel plate is deformed under pressure, the two ends of the leaf spring 210 can drive the connecting frame 220 to rotate on the lifting lug 111, so that the leaf spring 210 can deform in the vertical direction and bend upward, so that the two ends of the leaf spring 210 can move synchronously, thereby stabilizing the middle part of the leaf spring 210 in the horizontal direction. This reduces the possibility of the rear axle 310 moving backward, prevents the force on the connecting parts at both ends of the limit rod 320 from increasing sharply, and reduces the possibility of the limit rod 320 failing to connect with the frame 100.

[0034] In addition, the two ends of the support tube 112 are connected to the two sides of the lug 111, which can enhance the structural strength of the support tube 112. Furthermore, the support tube 112 abuts against the frame 100, which can disperse the force of the leaf spring 210, allowing the force on the lug 111 to be better transmitted to the frame 100, improving the stress on the lug 111, and enhancing the connection stability and reliability of the limit rod 320 and the lug 111.

[0035] It should be noted that the connecting frame 220 and the lifting lug 111 are rotatably connected. When the leaf spring 210 is compressed, it can drive the connecting frames 220 at both ends to rotate in a direction away from each other, so that the rear axle 310 located in the middle of the leaf spring 210 can move upward. This reduces the distance that the rear axle 310 moves horizontally backward, so that the limiting rod 320 can stably limit the movement position of the rear axle 310 and reduce the force on the limiting rod 320. This reduces the possibility of failure in the connection between the limiting rod 320 and the frame 100 or the limiting rod 320 and the rear axle 310, and improves reliability.

[0036] Among them, the leaf spring 210 can be fixedly connected to the rear axle 310 by U-bolts; the limit rod 320 and the frame 100, as well as the limit rod 320 and the rear axle 310, can be connected by pins or bolts, which is not limited here.

[0037] Understandably, referring to Figure 1 and Figure 3The connecting frame 220 includes a first connecting rod (not shown in the attached drawings), a second connecting rod (not shown in the attached drawings), and two connecting plates 221. Both ends of the first and second connecting rods are connected to the two connecting plates 221, and the first and second connecting rods are respectively arranged at both ends of the connecting plates 221. The first connecting rod passes through the lifting lug 111, and the second connecting rod passes through the leaf spring 210. The first and second connecting rods are both connected to the two connecting plates 221. By setting the first connecting rod to pass through the lifting lug 111 and the second connecting rod to pass through the leaf spring 210, the connecting frame 220 can rotate stably on the lifting lug 111, and the leaf spring 210 can rotate stably on the connecting frame 220. This allows the leaf spring 210 to drive the connecting frame 220 to rotate more smoothly when deformed under pressure, improving the reliability of the connection, extending the service life of the entire rear axle damping device, and also simplifying the structure, helping to reduce manufacturing costs and improve maintenance convenience.

[0038] It should be noted that the first connecting rod and the second connecting rod can be pins, bolts, etc., which will not be elaborated here.

[0039] Specifically, refer to Figure 1 and Figure 2 A rubber sleeve 113 is fixedly connected to the lug 111, and the first connecting rod passes through the rubber sleeve 113. The rubber sleeve 113 is fixedly connected to the lug 111. By setting the first connecting rod to pass through the rubber sleeve 113, the impact force and vibration generated during rotation can be effectively absorbed and dispersed, reducing the rigid collision and friction between the first connecting rod and the lug 111, reducing the wear of the first connecting rod and the lug 111, extending the service life of the first connecting rod and the lug 111, and improving the reliability of the rear axle shock absorption device.

[0040] It should be noted that the rubber sleeve 113 can be made of rubber, engineering plastic, etc., and is not limited here.

[0041] Specifically, refer to Figure 1 and Figure 3 Both sides of the connecting plate 221 are provided with bending portions 222, which protrude away from the lifting lug 111. The two bending portions 222 are respectively arranged on both sides of the connecting plate 221 to enhance the structural strength and rigidity of the connecting plate 221, so that the connecting frame 220 can bear more of the lateral load of the leaf spring 210, reducing the possibility of deformation or damage. This makes the rotation between the connecting frame 220 and the lifting lug 111, as well as between the connecting frame 220 and the leaf spring 210, stable and reliable, and extends the service life of the connecting frame 220.

[0042] In addition, the bending portion 222 protrudes away from the lifting lug 111, which can reduce the contact area between the connecting plate 221 and the leaf spring 210, thereby reducing the rotational resistance between the leaf spring 210 and the connecting plate 221, which helps to extend the service life and improve reliability.

[0043] Specifically, refer to Figure 1 and Figure 3 The bent portion 222 is inclinedly connected to the connecting plate 221 so that the distance between the two connecting plates 221 gradually increases from the middle to both sides. By setting the bent portion 222 to be inclinedly connected to the connecting plate 221, the distance between the two connecting plates 221 gradually increases from the middle to both sides, thereby forming a conical guide space. This facilitates the installation of the leaf spring 210 between the two connecting plates 221. Through the cooperation of the two bent portions 222, the leaf spring 210 can be guided to slide smoothly between the two connecting plates 221, which facilitates the assembly of the bridge damping device and improves the convenience of maintenance.

[0044] Understandably, referring to Figure 1 and Figure 2 The support tube 112 is square in shape, and its upper end face is in contact with the frame 100. By setting the support tube 112 to a square shape and making its upper end face in contact with the frame 100, the contact area between the support tube 112 and the frame 100 can be increased, allowing the force of the leaf spring 210 to be transmitted more evenly to the frame 100. This further improves the stress distribution of the hanger 111, reduces the risk of component damage caused by local stress concentration, and thus improves the connection stability between the hanger 111 and the frame 100.

[0045] Understandably, referring to Figure 1 The leaf spring 210 includes multiple leaf plates 211, which are stacked sequentially and fixedly connected by fasteners (not shown in the attached drawings). By stacking multiple leaf plates 211 together, the leaf spring 210 can deform more effectively, improving its shock absorption performance and elastic adaptability. This allows the electric tricycle to achieve better cushioning under different driving conditions, thus enhancing ride comfort.

[0046] In addition, the stacked combination of multiple leaf springs 211 can flexibly adjust the overall stiffness and load-bearing capacity of the leaf spring 210 according to actual needs. By increasing or decreasing the number of leaf springs 211 or replacing leaf springs 211 with different specifications, the needs of different models of electric tricycles and different usage scenarios can be met, thus enhancing the versatility of the rear axle shock absorption device.

[0047] It should be noted that the fasteners can be bolts, screws, etc., so that multiple springs 211 can be fixedly connected together, which will not be described in detail here.

[0048] Understandably, referring to Figure 4 Multiple connecting components 110 are provided on the same side of the frame 100. The connecting components 110 correspond one-to-one with the shock absorption mechanism 200, so that multiple leaf springs 210 can absorb more vibration or load of the frame 100, thereby improving the shock absorption capacity of the frame 100 and making the electric tricycle ride more smoothly.

[0049] It should be noted that the number of connecting components 110 on both sides of the frame 100 is the same, so that the shock absorption capacity on both sides of the frame 100 is consistent, thus improving the riding comfort.

[0050] Understandably, referring to Figure 1 The lifting lug 111 is welded to the frame 100. The connection between the lifting lug 111 and the frame 100 by welding forms a solid whole between the lifting lug 111 and the frame 100, reducing the risk of loosening or falling off at the connection point and improving the reliability and stability of the connection.

[0051] Understandably, referring to Figure 4 The electric tricycle of the second aspect of this utility model includes the rear axle shock absorption device of the first aspect of this utility model. Since the electric tricycle of this utility model has the technical features of all the above embodiments, it also has the beneficial effects of all the above embodiments, which will not be repeated here.

[0052] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A rear axle shock absorber, characterized in that, include: The frame has connecting components on both sides. Each connecting component includes two lugs, which are spaced apart on the frame. Each lug is fixedly connected to a support tube, which connects to both sides of the lug and abuts against the frame. Multiple shock-absorbing mechanisms are provided, each corresponding to a connecting component. Each shock-absorbing mechanism includes a leaf spring and two connecting frames. Each connecting frame corresponds to a lifting lug, and the connecting frame and the lifting lug are rotatably connected. Both ends of the leaf spring are rotatably connected to the two connecting frames respectively. The leaf spring is fixedly connected to the rear axle at its middle part. A limit rod is connected between the vehicle frame and the rear axle. One end of the limit rod is hinged to the vehicle frame, and the other end of the limit rod is hinged to the rear axle.

2. The rear axle damping device according to claim 1, characterized in that, The connecting frame includes a first connecting rod, a second connecting rod, and two connecting plates. Both ends of the first connecting rod and the second connecting rod are connected to the two connecting plates, and the first connecting rod and the second connecting rod are respectively arranged at both ends of the connecting plates. The first connecting rod passes through the lifting lug, and the second connecting rod passes through the leaf spring.

3. The rear axle damping device according to claim 2, characterized in that, The lifting lug is fixedly connected to a rubber sleeve, and the first connecting rod passes through the rubber sleeve.

4. The rear axle damping device according to claim 2, characterized in that, Both sides of the connecting plate are provided with bent portions, which protrude in a direction away from the lifting lug.

5. The rear axle damping device according to claim 4, characterized in that, The bent portion is inclinedly connected to the connecting plate so that the distance between the two connecting plates gradually increases from the middle to both sides.

6. The rear axle damping device according to claim 1, characterized in that, The support tube is square in shape, and its upper end face is in contact with the vehicle frame.

7. The rear axle damping device according to claim 1, characterized in that, The leaf spring includes multiple leaf springs, which are stacked sequentially and fixedly connected by fasteners.

8. The rear axle damping device according to claim 1, characterized in that, Multiple connecting components are provided on the same side of the vehicle frame.

9. The rear axle damping device according to claim 1, characterized in that, The lifting lug is welded to the vehicle frame.

10. An electric tricycle, characterized in that, It includes a rear axle damping device as described in any one of claims 1 to 9.

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