A three-wheeled electric vehicle carriage frame fixed connection mechanism

Abstract

The utility model discloses a kind of electric tricycle carriage frame fixed connection mechanism, belong to electric tricycle fixing technical field.The mechanism includes first connecting piece, second connecting piece, fixed part and locking part, wherein, first connecting piece and second connecting piece are oppositely arranged, fixed part connects first connecting piece and second connecting piece, and is fixed by locking part.Compared with traditional technology, the advantage of the utility model is that: fixed part and first connecting piece and second connecting piece form surface contact instead of point contact, after being fixed by locking part, its fixing force is dispersed to each point on contact surface, which makes the connection stress dispersion of electric tricycle carriage and frame, so that stress distribution is more uniform.Avoids local stress concentration, thereby improves the carrying capacity and damage resistance of fixed mechanism.

Description

Technical Field

[0001] This utility model relates to the field of electric tricycle fixing technology, specifically to a fixing connection mechanism for the carriage and frame of an electric tricycle. Background Technology

[0002] Currently, the fixing mechanism for the body and frame of electric tricycles generally adopts a single-point locking method. In this method, both the body and frame are equipped with plate-shaped fasteners, each with a pin hole. A single fastener precisely inserts the plate-shaped fastener into the pin hole, thus connecting the body and frame. This fixing method is relatively simple in structure and convenient to install, meeting the fixing needs of the body and frame in daily use to a certain extent, and is therefore widely used in the electric tricycle manufacturing industry.

[0003] However, this point-fixing method has significant drawbacks. Because the fixation relies on only a single latch, the stress distribution is extremely limited. When the electric tricycle encounters extreme conditions such as strong impacts or severe bumps, localized stress concentration occurs at the contact point between the latch and the pin hole. This stress concentration accelerates the wear and damage of the fixing mechanism, and in severe cases, can even lead to latch breakage and separation of the vehicle body from the frame. This not only affects the normal operation of the vehicle but also poses a significant safety hazard to the driver and passengers, severely restricting the safety and reliability of electric tricycles.

[0004] In view of this, improvements are needed to address the aforementioned deficiencies. Utility Model Content

[0005] In view of the above-mentioned technical deficiencies, the purpose of this utility model is to provide a fixing connection mechanism for the carriage and frame of an electric tricycle, so as to solve the defect of local stress concentration in the fixing mechanism in the prior art.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The present invention provides a fixing connection mechanism for the carriage frame of an electric tricycle, characterized in that it includes: a plurality of opposing first connecting members and second connecting members, the first connecting members and second connecting members being connected by a fixing member, the fixing member being located between the first connecting members and second connecting members; wherein, the fixing member forms surface contact with the first connecting member and the second connecting member respectively, the contact surface is provided with a locking part, the locking part locking the contact surface together and bearing tensile force, the locking part being perpendicular to the long side of the fixing member.

[0007] Optionally, a plurality of locking parts are provided and are evenly distributed at equal intervals along the long side of the fastener.

[0008] Optionally, the locking part includes a screw and nuts threaded onto both ends of the screw, wherein the screw passes through the space between the first connector and the fixing member, and between the second connector and the fixing member.

[0009] Optionally, the fastener is integrally formed, and the fastener is provided with a first groove and a second groove, and the first connector and the second connector are respectively fixed in the first groove and the second groove.

[0010] Optionally, a first inclined surface is provided on both sides of the first connector, the first inclined surface is located on the side of the first connector away from the second connector, and a second inclined surface is provided at the position of the first groove corresponding to the first inclined surface for use therewith.

[0011] Optionally, the two second inclined surfaces on both sides are inclined close to each other and form a constriction on their closest end faces, and the first groove covers the first connector through the constriction.

[0012] Optionally, a first flexible member is provided in both the first groove and the second groove, and the first connector and the second connector are tightly abutted against the first flexible member.

[0013] Optionally, the first connector and the fixing member, as well as the second connector and the fixing member, are provided with holes for use with screws. A second flexible member is provided in the hole, and the second flexible member abuts tightly against the outer peripheral surface of the screw and the inner wall surface of the hole.

[0014] Optionally, the second flexible member has an extension on the side facing the nut, the extension being tightly abutting between the nut and the fixing member.

[0015] Optionally, two adjacent fasteners are connected by a third connector, and a reinforcing rib is fixed on the third connector and fixed to the side wall of the fastener.

[0016] The beneficial effects of this utility model are as follows: This utility model includes a first connecting member, a second connecting member, and a fixing member connecting them. The fixing member forms surface contact with the first and second connecting members rather than point contact. After being fixed by the locking part, the fixing force is distributed to various points on the contact surface. This disperses the connection stress between the electric tricycle's body and frame, resulting in a more uniform force distribution. It avoids local stress concentration, thereby improving the load-bearing capacity and damage resistance of the fixing mechanism.

[0017] Furthermore, the first connector of this utility model has a first inclined surface, and the first groove on the fixing member for covering the first connector has a second inclined surface corresponding to the first inclined surface. The two closest end faces of the second inclined surface are close to each other, so that the first groove covers the first connector. This covering increases the contact area between the fixing member and the first connector, which further disperses the connection stress. At the same time, the covering connection method also makes it less likely for the first connector to fall off the fixing member, making the connection more stable.

[0018] Finally, the present invention also provides a first flexible part and a second flexible part to provide flexible buffering for the connection between the fixing member, the first connecting member, the second connecting member and the locking part, so that when they are subjected to impact, the first flexible part and the second flexible part can buffer the impact, while also making the connection between the locking part and the other part more secure and less prone to loosening. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is an overall structural diagram of a fixed connection mechanism for the carriage and frame of an electric tricycle according to this utility model.

[0021] Figure 2 This is a three-dimensional structural diagram (excluding the vehicle body) of an electric tricycle frame fixing connection mechanism according to the present invention.

[0022] Figure 3 This utility model relates to a fixing connection mechanism for the carriage frame of an electric tricycle. Figure 2 Enlarged view of point A in the image.

[0023] Figure 4 This utility model relates to a fixing connection mechanism for the carriage frame of an electric tricycle. Figure 2 The cross-sectional view along point a.

[0024] Figure 5 This utility model relates to a fixing connection mechanism for the carriage frame of an electric tricycle. Figure 4 Enlarged view of point B in the middle.

[0025] Figure 6 This is a partial exploded perspective view (excluding the vehicle body) of an electric tricycle frame fixing connection mechanism according to the present invention.

[0026] Explanation of reference numerals in the attached figures: 1. First connector; 11. First inclined surface; 2. Second connector; 3. Third connector; 31. Reinforcing rib; 4. Fixing member; 41. First groove; 42. Second groove; 43. Second inclined surface; 5. First flexible member; 6. Second flexible member; 61. Extension; 7. Screw; 71. Nut. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] As mentioned earlier, the existing fixing mechanisms for the electric tricycle's cargo box and frame have defects. Because the fixing relies on only a single latch, the stress distribution is extremely limited. When the electric tricycle encounters extreme conditions such as strong impacts or severe bumps, localized stress concentration occurs at the contact point between the latch and the pin hole. This stress concentration accelerates the wear and damage of the fixing mechanism, and in severe cases, can even lead to latch breakage and the cargo box separating from the frame. This not only affects the normal operation of the vehicle but also poses a significant safety hazard to the driver and passengers, severely restricting the safety and reliability of electric tricycles.

[0029] To address this issue, the present invention provides a fixing connection mechanism for the fixing connection of the carriage frame of an electric tricycle, thereby solving the aforementioned problems. The present invention solves this problem in the following way.

[0030] Example 1: like Figures 1 to 6 As shown, this embodiment provides a fixing connection mechanism for the electric tricycle's carriage frame. This mechanism includes at least a first connecting member 1, a second connecting member 2, a fixing member 4, and a locking part. Two first connecting members 1 are provided, fixedly connected in parallel to the bottom of the electric tricycle carriage. Two second connecting members 2 are also provided, fixedly connected in parallel to the top of the electric tricycle frame (e.g., by welding or integral molding). The first connecting members 1 and the second connecting members 2 are connected by the fixing member 4. Specifically, the fixing member 4 is an integrally molded, "H"-shaped component, with a first groove 41 and a second groove 42 respectively. A first flexible member 5 (made of a material with certain deformation and cushioning capabilities, such as silicone) is provided in both the first groove 41 and the second groove 42. The first connecting member 1 and the second connecting member 2 are respectively disposed in the first groove 41 and the second groove 42, and tightly abut against their groove surfaces to form a contact surface (e.g., ...). Figure 3 or Figure 4 (As shown). The contact surfaces are connected together by locking parts and bear tensile force. Several locking parts are provided and are evenly spaced along the long side of the fastener 4 and perpendicular to the contact surfaces mentioned above.

[0031] In this first embodiment, as Figure 3 or Figure 4As shown, the locking part includes a screw 7 and nuts 71 threaded onto both ends of the screw 7. The screw 7 passes through the first connector 1 and the fixing member 4, as well as the second connector 2 and the fixing member 4.

[0032] Therefore, upon impact (e.g., impacting a part of the carriage or frame and bearing the impact force), the carriage or frame will transmit this impact force to the first connecting member 1 or the second connecting member 2. Since the first connecting member 1 and the second connecting member 2 form surface contact with the fixing member 4, the impact force is dispersed to the fixing member 4, resulting in a more uniform force distribution. This avoids localized stress concentration, thereby improving its load-bearing capacity and damage resistance.

[0033] In this first embodiment, as Figure 1 or Figure 2 As shown, two adjacent fasteners 4 are connected by a third connector 3, on which a reinforcing rib 31 is fixed. The reinforcing rib 31 is fixed to the side wall of the fastener 4. Therefore, when subjected to an impact (for example, when the sides of the carriage or frame are impacted, causing the carriage or frame to deform inward), the third connector 3 bears the impact force caused by this deformation, keeping the fasteners 4 on both sides stable and preventing mutual displacement. At the same time, the reinforcing rib 31 disperses this force, preventing it from concentrating on the connection surface between the third connector 3 and the fastener 4, thereby further ensuring stress dispersion and enhancing its resistance to damage.

[0034] Second embodiment: Based on the above embodiments, in order to provide a clearer and more complete explanation of the technical solutions therein, this utility model also provides an embodiment two. For example... Figure 4 As shown, in this second embodiment, a first inclined surface 11 is provided on both sides of the first connector 1. The first inclined surface 11 is located on the side of the first connector 1 away from the second connector 2 (i.e., the groove opening of the first groove 41). A second inclined surface 43 is provided on the first groove 41 corresponding to the position of the first inclined surface 11. The two second inclined surfaces 43 are inclined towards each other and form a constriction on their closest end face (i.e., the groove opening of the first groove 41). The constriction is smaller than the horizontal cross-section of the main body of the first connector 1. The first groove 41 covers the first connector 1 through the constriction.

[0035] This allows the first connector 1 and the fixing member 4 to move vertically, with the opening and the bottom of the first groove 41 creating a limiting push, thereby dispersing the pressure of the locking force generated by the displacement of the first connector 1. This improves the stability of the first connector 1 and the fixing member 4. At the same time, this covering also increases the contact area between the first groove 41 and the first connector 1, further dispersing the impact stress and improving the impact resistance of the fixing mechanism.

[0036] Example 3: Based on the above embodiments, in order to provide a clearer and more complete explanation of the technical solutions therein, this utility model also provides Embodiment Three. For example... Figures 4 to 5 As shown in this embodiment, the first connector 1, the second connector 2, and the fixing member 4 are all provided with holes for connection with the locking part. A second flexible member 6 (the second flexible member 6, like the first flexible member 5, is made of a material with certain deformation and buffering capabilities, such as silicone) is provided on the wall of these holes. Like the first flexible member 5, the second flexible member 6 can increase the frictional force between the components and simultaneously provide shock absorption and cushioning against impact, making it less prone to displacement. When the screw 7 of the locking part is inserted into the aforementioned holes, the outer wall surface of the screw 7, the second flexible member 6, and the inner wall surface of the hole are tightly pressed together and abutted against each other. Finally, it is locked in place by the nut 71, further strengthening the impact resistance of the aforementioned fixing mechanism under impact and making the connection of the locking part more secure and less prone to loosening.

[0037] In this third embodiment, as Figure 5 As shown, in one preferred embodiment, an extension 61 is provided on the side of the second flexible member 6 facing the nut 71, and the extension 61 abuts tightly between the nut 71 and the fixing member 4. This makes the connection between the nut 71 and the screw 7 more secure.

[0038] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of this utility model and its equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A fixing and connecting mechanism for the carriage frame of an electric tricycle, characterized in that, include: A plurality of opposing first connectors (1) and second connectors (2) are provided, the first connectors (1) and second connectors (2) are connected by a fastener (4), the fastener (4) being located between the first connectors (1) and second connectors (2); The fixing member (4) forms a contact surface with the first connecting member (1) and the second connecting member (2) respectively. The contact surface is provided with a locking part, which locks the contact surface together and bears the tensile force. The locking part is perpendicular to the long side of the fixing member (4).

2. The electric tricycle carriage frame fixing connection mechanism as described in claim 1, characterized in that, The locking part is provided in several parts and is evenly distributed at equal distances along the long side of the fixing member (4).

3. The electric tricycle carriage frame fixing connection mechanism as described in claim 1, characterized in that, The locking part includes a screw (7) and a nut (71) threaded onto both ends of the screw (7). The screw (7) passes through between the first connector (1) and the fixing member (4), and between the second connector (2) and the fixing member (4).

4. The electric tricycle carriage frame fixing connection mechanism as described in claim 1, characterized in that, The fixing member (4) is integrally formed, and the fixing member (4) is provided with a first groove (41) and a second groove (42). The first connecting member (1) and the second connecting member (2) are respectively fixed in the first groove (41) and the second groove (42).

5. The electric tricycle carriage frame fixing connection mechanism as described in claim 4, characterized in that, The first connector (1) has a first inclined surface (11) on both sides. The first inclined surface (11) is located on the side of the first connector (1) away from the second connector (2). The first groove (41) has a second inclined surface (43) at the position corresponding to the first inclined surface (11) for use.

6. The electric tricycle carriage frame fixing connection mechanism as described in claim 5, characterized in that, The second inclined surfaces (43) on both sides are inclined close to each other and form a constriction on their closest end faces. The first groove (41) covers the first connector (1) through the constriction.

7. The electric tricycle carriage frame fixing connection mechanism as described in claim 4, characterized in that, The first groove (41) and the second groove (42) are each provided with a first flexible member (5), and the first connector (1) and the second connector (2) are tightly abutted against the first flexible member (5).

8. The electric tricycle carriage frame fixing connection mechanism as described in claim 3, characterized in that, The first connector (1) and the fixing member (4), as well as the second connector (2) and the fixing member (4), are provided with holes for use with screws (7). A second flexible member (6) is provided in the hole, and the second flexible member (6) is in close contact with the outer peripheral surface of the screw (7) and the inner wall surface of the hole.

9. The electric tricycle carriage frame fixing connection mechanism as described in claim 8, characterized in that, The second flexible member (6) has an extension (61) on the side facing the nut (71), and the extension (61) is tightly abutted between the nut (71) and the fixing member (4).

10. The electric tricycle carriage frame fixing connection mechanism as described in claim 1, characterized in that, The two adjacent fasteners (4) are connected by a third connector (3), and a reinforcing rib (31) is fixed on the third connector (3). The reinforcing rib (31) is fixed on the side wall of the fastener (4).

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