Anti-lifting and tilting structure of an electric tailgate

Abstract

This utility model provides an anti-tilting structure for an electric tailgate during lifting, belonging to the field of automotive parts technology. This utility model features a limit pin on a fixed base mounted on the main beam. The upper end of the follower arm is hinged to the upper part of the fixed base, the middle part of the follower arm is hinged to the inner end of the lifting arm, and the lower end of the follower arm is hinged to the lifting cylinder. Furthermore, a hook is provided at the inner end of the lifting arm. When the lifting arm deflects during the lifting of the platform, the hook on the lifting arm can engage the limit pin. The cooperation of the limit pin and the hook allows the fixed base to provide load-bearing capacity to the lifting arm, enabling the platform to obtain greater and more stable load-bearing capacity from the main beam. This prevents the platform from tilting during lifting, improving safety. Moreover, the hook can separate from the limit pin after the lifting arm deflects at a predetermined angle, meeting the needs of the platform tilting down or up, ensuring the normal operation of the electric tailgate.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, specifically to an anti-lifting and tilting structure for an electric tailgate. Background Technology

[0002] With the widespread application of tailgates on freight trucks, it is easier to transfer goods between the truck bed and the ground, improving work efficiency while reducing the workload of staff and lowering freight costs.

[0003] Furthermore, due to the development of new energy technologies, electric tailgate technology driven by electric push rods is becoming increasingly mature, and its market share is also increasing. Currently, existing electric tailgates on the market, such as the one disclosed in patent CN220720913U, have fixed beams and lifting beams on both sides of the tailgate beam that are hinged to the support platform. A lifting cylinder that drives the support platform to rise and fall is connected to the lifting beam. A fixed seat is welded to the tailgate beam, and a follower arm that swings with the lifting cylinder is hinged to the top of the fixed seat. The inner end of the lifting beam is hinged to the middle of the follower arm, and the top of the outer end of the lifting beam is hinged to the inner end of the support platform. The inner end of the lifting cylinder is hinged to the bottom of the follower arm, and the outer end of the lifting cylinder is hinged to the bottom of the outer end of the lifting beam. In addition, the inner end of the fixed beam is hinged to the tailgate beam via a connecting seat, and the outer end of the fixed beam is connected to the inner end of the carrying platform via a lifting arm. The top of the lifting arm is connected to the inner end of the carrying platform and the top of the outer end of the lifting beam via a through-pin, and the bottom of the lifting arm is hinged to the outer end of the fixed beam. During use, as the carrying platform is raised and lowered, the lifting cylinder extends and retracts, the inner end of the fixed beam rotates around the connecting seat, and after the carrying platform descends to the set position, the lifting rod moves, causing the follower arm to deflect on the fixed seat, thereby realizing the nodding or raising of the carrying platform. Although the above structure can meet the usage requirements of the electric tailgate, in actual use, if the load on the carrying platform is heavy and located at the outer end of the carrying platform, the force on the inner end of the carrying platform increases, making the load-bearing capacity of the follower arm on the lifting beam insufficient. This can cause the carrying platform to tilt due to insufficient load-bearing capacity, posing a safety risk such as cargo falling. Summary of the Invention

[0004] To address the aforementioned problems in the existing technology, this invention aims to provide an anti-tilting structure for an electric tailgate. A hook is installed at the inner end of the lifting arm, and a limit pin is installed on a fixed seat hinged to the follower arm. When the lifting arm deflects due to the lifting of the carrying platform, the lifting arm can hook the limit pin via the hook. The limit pin and hook provide load-bearing capacity to the lifting arm, limiting the deflection of the follower arm. This allows the main beam where the fixed seat is located to also provide load-bearing capacity to the carrying platform during the lifting process, thus preventing the carrying platform from tilting due to insufficient load-bearing capacity, resulting in higher safety. After the carrying platform descends to a predetermined height, the hook disengages from the limit pin, releasing the restriction on the follower arm, allowing the follower arm to deflect under the action of the lifting cylinder, thereby meeting the usage requirements of the carrying platform tilting down or up.

[0005] The specific technical solution is as follows:

[0006] An anti-tilting structure for an electric tailgate includes a main beam, a support platform, a fixed seat, a follower arm, a lifting arm, a support arm, and a lifting cylinder. The main beam is mounted on a vehicle frame, and fixed seats are provided at both ends of the main beam. The upper end of the fixed seat is hinged to the upper end of the follower arm, the middle part of the follower arm is hinged to the inner end of the lifting arm, the upper part of the outer end of the lifting arm is hinged to the inner end of the support platform, the lower end of the follower arm is hinged to one end of the lifting cylinder, and the other end of the lifting cylinder is hinged to the lower part of the outer end of the lifting arm. At the same time, both ends of the support arm are respectively hinged between the main beam and the inner end of the support platform. The structure features a limit pin on the side of the fixed seat that is hinged to the follower arm, and a hook on the inner end of the lifting arm. The hook selectively engages the limit pin. During the lifting and lowering of the support platform, the hook engages the limit pin. When the support platform descends to a predetermined height and needs to tilt down or up, the hook separates from the limit pin.

[0007] In the above-mentioned anti-tilting structure for an electric tailgate, the opening of the hook is arranged downwards, and the groove of the hook is an arc-shaped groove, with the center of the arc-shaped groove located on the hinge axis of the hinge point of the lifting arm on the follower arm.

[0008] In the above-mentioned anti-tilting structure for an electric tailgate, a limiting pin is provided at the lower end of the fixed base and below the hinge point of the lifting arm on the follower arm, and a hook is provided in the extension direction of the inner end of the lifting arm. Furthermore, the hook and the outer end of the lifting arm are respectively located on both sides of the hinge point where the lifting arm is hinged to the follower arm.

[0009] In the aforementioned anti-tipping structure for an electric tailgate, the hook and the lifting arm are an integrated structure.

[0010] In the above-mentioned anti-tilting structure for an electric tailgate, a recessed notch is provided in the middle of the fixed seat and on the side close to the bearing platform. During the lifting and lowering of the bearing platform, the hinged part of the lifting arm that is hinged to the follower arm is located within the notch.

[0011] The above-mentioned anti-tilting structure for an electric tailgate includes a fixed base comprising two fixed plates arranged at intervals, wherein the inner end of the lifting arm extends into the interval between the two fixed plates.

[0012] In the above-mentioned anti-lifting tilting structure of an electric tailgate, each fixed plate has an assembly hole at its lower part, and the assembly holes of the two fixed plates on the same fixed seat are arranged coaxially along the arrangement direction of the main beam. The two ends of the limiting pin are respectively installed in the assembly holes on the two fixed plates.

[0013] In the above-mentioned anti-lifting tilting structure of an electric tailgate, each fixed plate has a protrusion at its lower part and on the side facing the bearing platform, and mounting holes are provided on the protrusion.

[0014] The positive effects of the above technical solution are:

[0015] The aforementioned anti-tilting structure of the electric tailgate utilizes a hook at the inner end of the lifting arm and a limit pin on the fixed seat hinged to the follower arm. The inner end of the lifting arm is hinged to the middle of the follower arm. This allows the lifting arm to engage the limit pin via the hook when the lifting arm deflects due to the lifting of the platform, limiting the deflection of the follower arm. The hook and limit pin work together to connect the lifting arm to the main beam where the fixed seat is located, enabling the main beam to provide load-bearing capacity to the platform. This ensures greater load capacity and stability during lifting, effectively preventing tilting due to insufficient load-bearing capacity and improving safety. Furthermore, after the platform descends to a predetermined height, the lifting arm deflects, causing the hook and limit pin to separate, releasing the restriction on the follower arm. This allows the follower arm to deflect under the action of the lifting cylinder, meeting the platform's tilting requirements. Attached Figure Description

[0016] Figure 1 This is a structural diagram of an embodiment of an anti-lifting tilting structure for an electric tailgate according to the present invention;

[0017] Figure 2 This is a schematic diagram of the installation of the lifting arm on the fixed base of an anti-lifting tilting structure for an electric tailgate according to this utility model.

[0018] Figure 3 This is a structural diagram of the lifting arm of an anti-lifting tilting structure for an electric tailgate according to this utility model;

[0019] Figure 4This is a structural diagram of the fixing seat of an anti-lifting and tilting structure for an electric tailgate according to this utility model.

[0020] In the attached diagram: 1. Main beam; 2. Load-bearing platform; 3. Fixed seat; 31. Limit pin; 32. Fixed plate; 321. Notch; 322. Assembly hole; 323. Protrusion; 4. Follower arm; 5. Lifting arm; 51. Hook; 511. Groove; 6. Lifting arm; 7. Lifting cylinder. Detailed Implementation

[0021] To make the technical means, creative features, objectives, and effects of this utility model easier to understand, the following embodiments are provided in conjunction with the appendix. Figure 1 To be continued Figure 4 The technical solution provided by this utility model is described in detail, but the following content is not intended to limit this utility model.

[0022] Figure 1 This is a structural diagram of an embodiment of an anti-lifting tilting structure for an electric tailgate according to the present invention; Figure 2 This is a schematic diagram showing the installation of the lifting arm on the fixed base of an anti-tilting structure for an electric tailgate according to this utility model. Figure 1 and Figure 2 As shown, the electric tailgate in the anti-tipping structure of the electric tailgate provided in this embodiment includes: a main beam 1, a bearing platform 2, a fixed base 3, a follower arm 4, a lifting arm 5, a support arm 6, and a lifting cylinder 7. The anti-tipping structure includes a limiting pin 31 and a hook 51, and the hook 51 is provided on the lifting arm 5, and the limiting pin 31 is set on the fixed base 3. At this time, the main beam 1 is installed on the frame. Both ends of the main beam 1 are equipped with fixed seats 3. The upper end of the fixed seat 3 is hinged to the upper end of the follower arm 4. The middle part of the follower arm 4 is hinged to the inner end of the lifting arm 5. The upper part of the outer end of the lifting arm 5 is hinged to the inner end of the carrying platform 2. The lower end of the follower arm 4 is hinged to one end of the lifting cylinder 7. The other end of the lifting cylinder 7 is hinged to the lower part of the outer end of the lifting arm 5. At the same time, the two ends of the lifting arm 6 are respectively hinged between the inner ends of the main beam 1 and the carrying platform 2, so that when the lifting cylinder 7 extends and retracts, the lifting arm 5 and the lifting arm 6 can realize the lifting and lowering of the carrying platform 2, which meets the needs of the carrying platform 2 to transfer goods between the carriage and the ground. In addition, when the carrying platform 2 descends to the predetermined height, the lifting cylinder 7 continues to operate, and the swaying of the follower arm 4 on the fixed seat 3 enables the carrying platform 2 to tilt up or down, facilitating the loading and unloading of goods on the carrying platform 2. Its structure is the same as or similar to the structure of existing electric tailgates on the market, such as the electric tailgates disclosed in patent documents such as CN220720913U and CN116923229A. Since it belongs to the prior art, its specific structure and operating principle will not be described in detail here.

[0023] Specifically, the limiting pin 31 is set on the side of the fixed base 3 that is hinged to the follower arm 4. At the same time, a hook 51 is set on the inner end of the lifting arm 5. The hook 51 selectively hooks the limiting pin 31. At this time, during the lifting and lowering process of the carrying platform 2, the hook 51 hooks the limiting pin 31. When the carrying platform 2 needs to lower or raise its head after descending to the predetermined height, the hook 51 separates from the limiting pin 31. That is, when the carrying platform 2 is lifted and lowered, after the hook 51 hooks the limiting pin 31, the fixed base 3 provides the bearing force to the lifting arm 5. That is, the main beam 1 installed on the fixed base 3 can also provide the bearing force to the carrying platform 2. This avoids the problem of the carrying platform 2 tilting due to the insufficient bearing force caused by the follower arm 4 deflecting, which is easily caused by the follower arm 4 providing the bearing force alone. This maintains the stability of the carrying platform 2 during the lifting and lowering process and improves the safety of the electric tailgate during the lifting and lowering process. After the carrying platform 2 descends to the predetermined height, the hook 51 follows the rotation of the lifting arm 5 and separates from the limit pin 31, so that the follower arm 4 can deflect under the action of the lifting cylinder 7, thereby meeting the usage requirements of the carrying platform 2 to lower or raise its head.

[0024] Figure 3 This is a structural diagram of the lifting arm of an anti-tilting structure for an electric tailgate according to this utility model. Figure 1 , Figure 2 as well as Figure 3 As shown, the opening of the hook 51 on the lifting arm 5 is arranged downwards, and the groove 511 of the hook 51 is an arc-shaped groove. At this time, the center of the arc-shaped groove is located on the hinge axis of the hinge point of the lifting arm 5 on the follower arm 4. That is, the distance between each part in the arc-shaped groove and the hinge axis of the hinge point of the lifting arm 5 on the follower arm 4 is the same. Thus, during the lifting and lowering process of the carrying platform 2, when the lifting arm 5 deflects around its hinge point on the follower arm 4, the groove 511 of the hook 51 can continuously cooperate with the limit pin 31. This can prevent the follower arm 4 from deflecting and ensure that the lifting arm 5 itself can deflect. This provides a stable and sufficiently large load-bearing capacity for the carrying platform 2 while also meeting the lifting and lowering requirements of the carrying platform 2.

[0025] More specifically, the limiting pin 31, used in conjunction with the hook 51, is located at the lower end of the fixed base 3 and below the hinge point of the lifting arm 5 on the follower arm 4. The hook 51 is located in the extension direction of the inner end of the lifting arm 5. Furthermore, the hook 51 and the outer end of the lifting arm 5 are located on either side of the hinge point where the lifting arm 5 is hinged to the follower arm 4, such that when the outer end of the lifting arm 5 deflects upward, the hook 51 deflects downward, and vice versa. When the limiting pin 31 located below the hinge point where the lifting arm 5 is hinged to the follower arm 4 is in use, the hook 51 will separate from the limiting pin 31 only after the outer end of the lifting arm 5 is deflected downward to a predetermined angle. At this time, the lifting arm 5 after being deflected downward to a predetermined angle is in perfect coordination with the state after the carrying platform 2 has descended to a predetermined height. This allows the follower arm 4 in this state to no longer be affected by the hook 51 and the limiting pin 31. The follower arm 4 can deflect under the action of the lifting cylinder 7, thereby realizing the downward or upward movement of the carrying platform 2.

[0026] More specifically, the hook 51 on the lifting arm 5 is an integral structure with the lifting arm 5, which ensures the structural strength of the hook 51. When the groove 511 of the hook 51 and the limit pin 31 are engaged, the load-bearing capacity provided by the limit pin 31 through the hook 51 can be more reliable and stable, thereby avoiding the problem that the load-bearing platform 2 is prone to tilting during the lifting process due to insufficient load-bearing capacity, and further improving the safety of the electric tailgate.

[0027] Figure 4 This is a structural diagram of the fixing base for an anti-lifting and tilting structure of an electric tailgate according to this utility model. Figure 2 and Figure 4 As shown, a recessed notch 321 is provided in the middle of the fixed base 3 and on the side near the bearing platform 2. The notch 321 forms a clearance space on the side of the fixed base 3 near the bearing platform 2. During the lifting and lowering of the bearing platform 2, the hinge part of the lifting arm 5 is hinged to the follower arm 4 and is located in the notch 321. At this time, since the upper end of the follower arm 4 is hinged to the upper part of the fixed base 3 and the inner end of the lifting arm 5 is hinged to the middle of the follower arm 4, when the bearing platform 2 needs to maintain the vertical state of the follower arm 4 during the lifting and lowering process, the notch 321 can provide clearance space for the hinge part of the lifting arm 5 on the follower arm 4. This avoids the problem that the fixed base 3 blocks the hinge part of the lifting arm 5 on the follower arm 4, which would prevent the follower arm 4 from being arranged vertically. The structural design is more reasonable.

[0028] More specifically, each fixed seat 3 on the main beam 1 includes two fixed plates 32. These fixed plates 32 are spaced apart along the main beam 1's orientation, and the inner end of the lifting arm 5 extends into the gap between the two fixed plates 32. The space between the two fixed plates 32 provides installation and deflection space for the inner end of the lifting arm 5. Furthermore, this arrangement ensures that both sides of the inner end of the lifting arm 5 have supporting fixed plates 32, thereby improving the stability of the lifting arm 5 hinged to the fixed seat 3 and resulting in a more rational structural design.

[0029] More specifically, each fixed plate 32 has an assembly hole 322 at its lower part, and the assembly holes 322 of the two fixed plates 32 on the same fixed seat 3 are arranged coaxially along the arrangement direction of the main beam 1. At this time, the two ends of the limiting pin 31 are respectively installed in the assembly holes 322 on the two fixed plates 32, so that both ends of the limiting pin 31 have corresponding support parts, which improves the stability of the limiting pin 31 after installation and avoids problems such as bending or tilting when only one end of the limiting pin 31 is fixed, which would affect the cooperation effect with the hook 51. This provides conditions for providing a larger and more stable load-bearing capacity for the bearing platform 2 through the cooperation of the limiting pin 31 and the hook 51 of the lifting arm 5.

[0030] More specifically, each fixed plate 32 has a protrusion 323 at its lower part and on the side facing the support platform 2, and the mounting hole 322 is set on the protrusion 323. The protrusion 323 expands the structural area of ​​the lower part of the fixed plate 32, which facilitates the arrangement and processing of the mounting hole 322. At the same time, it also has enough margin to accommodate the larger mounting hole 322, ensuring that the limit pin 31 installed through the mounting hole 322 has higher structural strength and better anti-tilting effect during the lifting and lowering process of the support platform 2.

[0031] The anti-tilting structure for the electric tailgate provided in this embodiment includes a hook 51 and a limiting pin 31. A limiting pin 31 is provided on a fixed base 3 mounted on the main beam 1. Simultaneously, the upper end of the follower arm 4 is hinged to the upper part of the fixed base 3, the middle part of the follower arm 4 is hinged to the inner end of the lifting arm 5, and the lower end of the follower arm 4 is hinged to the lifting cylinder 7. Furthermore, a hook 51 is provided at the inner end of the lifting arm 5, so that when the lifting arm 5 deflects due to the lifting of the carrying platform 2, the hook 51 on the lifting arm 5 can engage the limiting pin 31. Through the limiting pin 31 and the hook... The 51 engagement allows the fixed seat 3 to provide load-bearing capacity for the lifting arm 5, enabling the carrying platform 2 to obtain greater and more stable load-bearing capacity from the main beam 1. This avoids the problem of the carrying platform 2 tilting downwards during the lifting process, improving safety. In addition, after the carrying platform 2 descends to a predetermined height to deflect the lifting arm 5 at a predetermined angle, the hook 51 can be separated from the limit pin 31 to release the restriction on the follower arm 4, allowing the follower arm 4 to deflect under the action of the lifting cylinder 7. This satisfies the usage requirements of the carrying platform 2 to lower or raise its head, ensuring the normal use of the electric tailgate.

[0032] The above are merely preferred embodiments of the present utility model and are not intended to limit the implementation methods and protection scope of the present utility model. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An anti-tilting structure for an electric tailgate, the electric tailgate comprising a main beam, a support platform, a fixed seat, a follower arm, a lifting arm, a support arm, and a lifting cylinder, wherein the main beam is mounted on a vehicle frame, and the fixed seat is provided at both ends of the main beam; the upper end of the fixed seat is hinged to the upper end of the follower arm; the middle part of the follower arm is hinged to the inner end of the lifting arm; the upper part of the outer end of the lifting arm is hinged to the inner end of the support platform; the lower end of the follower arm is hinged to one end of the lifting cylinder; and the other end of the lifting cylinder is hinged to the lower part of the outer end of the lifting arm; simultaneously, both ends of the support arm are respectively hinged between the main beam and the inner end of the support platform, characterized in that... A limit pin is provided on one side of the fixed base that is hinged to the follower arm. At the same time, a hook is provided at the inner end of the lifting arm. The hook selectively hooks the limit pin. During the lifting and lowering process of the carrying platform, the hook hooks the limit pin. When the carrying platform descends to a predetermined height and needs to lower or raise its head, the hook separates from the limit pin.

2. The anti-lifting tilting structure of the electric tailgate according to claim 1, characterized in that, The hook has its opening facing downwards, and the groove of the hook is an arc-shaped groove, with the center of the arc-shaped groove located on the hinge axis of the lifting arm at the hinge point on the follower arm.

3. The anti-lifting tilting structure of the electric tailgate according to claim 1, characterized in that, The limiting pin is located at the lower end of the fixed base and below the hinge point of the lifting arm on the follower arm. The hook is located in the extension direction of the inner end of the lifting arm. The hook and the outer end of the lifting arm are located on both sides of the hinge point where the lifting arm is hinged to the follower arm.

4. The anti-lifting tilting structure of the electric tailgate according to claim 3, characterized in that, The hook and the lifting arm are an integral structure.

5. The anti-lifting tilting structure of the electric tailgate according to claim 1, characterized in that, The fixed base has a recessed notch in the middle and on the side close to the bearing platform, and during the lifting and lowering of the bearing platform, the hinge part of the lifting arm that is hinged to the follower arm is located in the notch.

6. The anti-lifting tilting structure of the electric tailgate according to claim 1, characterized in that, The mounting base includes two mounting plates, which are arranged at a distance from each other, and the inner end of the lifting arm extends into the gap between the two mounting plates.

7. The anti-lifting tilting structure of the electric tailgate according to claim 6, characterized in that, Each of the fixing plates has an assembly hole at its lower part, and the assembly holes of the two fixing plates on the same fixing seat are arranged coaxially along the arrangement direction of the main beam. The two ends of the limiting pin are respectively installed in the assembly holes of the two fixing plates.

8. The anti-lifting tilting structure of the electric tailgate according to claim 7, characterized in that, Each of the fixed plates has a protrusion at its lower part and on the side facing the support platform, and the mounting hole is provided on the protrusion.

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