Angle adjustment mechanism for electrically driven trailer

Abstract

The utility model relates to an angle adjusting mechanism for electric drive trailer, including the head cover and being located between the two connecting arms of the rear end of head cover, and the head cover is rotatably connected with the connecting arm through the pivot, the head cover one side is fixedly equipped with the inner tooth circle, the second connecting arm inboard is fixedly equipped with the external gear base, this external gear base outer ring is equipped with at least one radial extension's guide groove along the circumference, the guide groove is slidably equipped with the external gear block, and still be equipped with reset spring between the guide groove and the external gear block, and the reset spring can promote the external gear block and make it slide to the engagement with the inner tooth circle to the outside, the external gear block one side still is equipped with the sliding rod that extends along the axial direction, the sliding rod front end passes through the character groove on the second connecting arm and inserts the curved groove in the handle, when the handle rotates, the curved groove can drive the sliding rod and move along the character groove, thereby adjusting the radial position of the external gear block, makes it with the inner tooth circle engagement or separates. The utility model discloses simple and compact structure, convenient operation.

Description

Technical Field

[0001] This utility model belongs to the field of electric vehicle technology, and mainly relates to an angle adjustment mechanism for an electric trailer. Background Technology

[0002] Currently, the angle adjustment mechanism of domestic folding electric drive trailers uses an axial meshing method for internal and external gears to adjust the angle. That is, the rotating shaft is fixed on the inner cover of the front of the vehicle, and the relative position of the rotating shaft and the inner cover of the front of the vehicle is fixed. The external gear is installed on the rotating shaft and can slide axially on the rotating shaft. The inner diameter of the external gear and the outer diameter of the rotating shaft are semi-circular to prevent the external gear from rotating relative to the rotating shaft. The internal gear is fixed on the outer cover of the front of the vehicle. When it is necessary to adjust the relative angle of the inner and outer covers of the front of the vehicle, the external gear needs to be pulled out along the rotating shaft to completely disengage the external gear from the internal gear. At this time, the inner and outer covers of the front of the vehicle can rotate relative to each other. After adjusting to the appropriate angle, the external gear is pushed into the internal gear along the rotating shaft to mesh with the internal gear, and the relative angle of the inner and outer covers of the front of the vehicle is fixed. Because the external and internal gears need to be separated axially during angle adjustment, sufficient operating space is required axially. This results in a wider front cover and increased weight. Additionally, the internal and external gears are in clearance fit, and even after meshing, the front cover still wobbles, directly affecting user comfort. Furthermore, the internal and external gears need to be separated axially. When there is a certain relative force between the inner and outer covers, friction causes jamming during gear separation, making angle adjustment inflexible and affecting the adjustment time. Summary of the Invention

[0003] To solve the above problems, this utility model provides a novel angle adjustment mechanism for electric drive trailers, which enables the external gear to engage and lock with the internal gear ring and then unlock by adjusting the radial position of the external gear, thereby achieving the purpose of adjusting the angle of the towing arm.

[0004] The purpose of this utility model and the technical problem it solves are achieved by the following technical solution. According to this utility model, an angle adjustment mechanism for an electric trailer includes an outer front cover fixed to the rear end of the towing arm and an inner front cover fixed to the front end of the frame body. The inner front cover is located between a first connecting arm and a second connecting arm at the rear end of the outer front cover and is rotatably connected to the two connecting arms via a rotating shaft. An internal gear ring is fixedly provided on one side of the inner front cover, and an external gear base is fixedly provided on the inner side of the second connecting arm. The external gear base has at least one radially extending guide groove in the circumferential direction. An external gear block is slidably provided in the guide groove. A return spring is also provided between the guide groove and the external gear block. The return spring can push the external gear block to slide outward to mesh with the internal gear ring. A sliding rod extending axially is also provided on one side of the external gear block. The front end of the sliding rod passes through a slot extending radially along the rotating shaft on the second connecting arm and inserts into a curved groove on the throttle. When the throttle is rotated, the curved groove can drive the sliding rod to move along the slot, thereby adjusting the radial position of the external gear block to mesh or disengage with the internal gear ring. The throttle is rotatably located on the outside of the second connecting arm.

[0005] The purpose of this utility model and the technical problems to be solved can be further achieved by the following technical measures.

[0006] In the aforementioned electric trailer angle adjustment mechanism, one end of the reset spring is located in a blind hole on the external gear block, and the other end is located in a blind hole on the guide groove.

[0007] The aforementioned angle adjustment mechanism for electric trailers has a connecting flange fixedly provided on the outer side of the first connecting arm, and the rotating shaft is rotatably connected to the first connecting arm through the connecting flange.

[0008] The aforementioned angle adjustment mechanism for an electric trailer includes a connecting flange comprising a flange body and a cylindrical mounting boss extending axially from one side of the flange body. The mounting boss is fitted into a central hole on the first connecting arm, and the rotating shaft passes through the mounting boss.

[0009] In the aforementioned electric drive trailer angle adjustment mechanism, the external gear base is fixed to the second connecting arm by screws, and the threaded hole on the external gear base for the screw to pass through is a stepped hole that allows the screw head to sink in.

[0010] In the aforementioned electric trailer angle adjustment mechanism, the rotating shaft extends out from the outside of the second connecting arm, and the throttle is rotatably mounted on the rotating shaft.

[0011] The aforementioned angle adjustment mechanism for electric trailers includes a rotating shaft comprising a small diameter section and a large diameter section. The large diameter section is used to achieve a rotatable connection between the inner and outer front covers of the vehicle. The small diameter section is located outside the second connecting arm. The throttle is pressed against the step formed between the small diameter section and the large diameter section by a stopper on the outer periphery of the small diameter section. Both ends of the large diameter section are also stopped outside the first and second connecting arms by stoppers on their outer periphery.

[0012] In the aforementioned angle adjustment mechanism for electric trailers, the stop is a retaining ring, and a retaining ring groove is provided at a corresponding position on the outer circumference of the rotating shaft.

[0013] The aforementioned angle adjustment mechanism for electric trailers has at least three guide grooves evenly distributed circumferentially on the external gear base.

[0014] The aforementioned angle adjustment mechanism for electric trailers has a concave-convex structure on the outer periphery of the throttle to increase friction.

[0015] Compared with the prior art, this utility model has significant advantages and beneficial effects. Through the above technical solution, this utility model achieves considerable technological advancement and practicality, and has broad industrial application value. It possesses at least the following advantages:

[0016] This invention achieves the engagement, locking, and disengagement / unlocking of the external gear block and the internal gear ring by adjusting the radial position of the external gear block, thereby adjusting and fixing the angle of the traction arm to meet different usage needs. Furthermore, the adjustment structure of this invention is simple and easy to operate, and it effectively solves problems such as the inability to completely lock the relative angle of the inner and outer covers of the vehicle front and jamming during the engagement and disengagement of the inner and outer gears. This improves the overall vehicle comfort, effectively shortens the angle adjustment time, reduces the size and weight of the vehicle front, and makes the entire vehicle conform to lightweight design principles. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the angle adjustment mechanism for an electric-driven trailer according to this utility model;

[0018] Figure 2 This is a schematic diagram of the front cover structure;

[0019] Figure 3 This is a schematic diagram of the connecting flange structure;

[0020] Figure 4 This is a schematic diagram of the rotating shaft structure;

[0021] Figure 5 This is a schematic diagram of the inner structure of the front cover;

[0022] Figure 6 This is a schematic diagram of the external gear base structure;

[0023] Figure 7 This is a schematic diagram of another view of the external gear base;

[0024] Figure 8 This is a schematic diagram of an external gear structure;

[0025] Figure 9 This is a schematic diagram of the throttle mechanism.

[0026] [Explanation of Key Component Symbols]

[0027] 1. Traction arm; 2. Connecting flange; 201. First mounting hole; 202. Mounting boss; 3. Rotary shaft; 301. Snap ring groove I; 302. Snap ring groove II; 303. Step; 304. Snap ring groove III; 4. Front cover; 401. Flange mounting hole; 402. Flange center hole; 403. Slotted groove; 404. First center hole; 405. First threaded hole; 5. Front cover; 501. Second threaded hole. 502. Second threaded hole; 6. Internal gear ring; 7. External gear base; 701. Second mounting hole; 702. Third center hole; 703. Guide groove; 704. First blind hole; 705. Boss; 8. External gear block; 801. External gear; 802. Sliding rod; 803. Second blind hole; 9. Throttle; 901. Fourth center hole; 902. Curved groove; 903. Five-star structure; 10. Frame body. Detailed Implementation

[0028] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended purpose of the invention, the following detailed description of the specific implementation method, structure, features and effects of the angle adjustment mechanism for electric trailers proposed according to this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0029] Please see Figure 1-9 This is a schematic diagram of the various parts of the angle adjustment mechanism for an electric trailer of this utility model. The angle adjustment mechanism includes a tow arm 1, a connecting flange 2, a rotating shaft 3, an outer front cover 4, an inner front cover 5, an internal gear ring 6, an external gear base 7, an external gear block 8, a throttle 9, and a frame body 10. The rear end of the tow arm 1 is fixedly connected to the outer front cover 4, and the front end of the frame body 10 is fixedly connected to the inner front cover 5. The outer front cover 4 and the inner front cover 5 are rotatably connected via the rotating shaft 3. The front end of the tow arm 1 is connected to the user's waist via a quick-release structure. By adjusting the relative angle between the outer front cover 4 and the inner front cover 5, the tow arm 1 can be adjusted to different heights to accommodate towers of different heights. In this embodiment, the front end of the outer front cover 4 is welded to the tow arm 1, but the connection is not limited to welding; it can also be achieved through bolts or other connecting components. In this embodiment, the inner front cover 5 is welded to the frame body 10, but this is not a limitation.

[0030] The front cover 4 is U-shaped and includes a connecting plate for welding and fixing to the traction arm 1 and two connecting arms positioned opposite each other at the rear end of the connecting plate. The first connecting arm has a flange center hole 402 and multiple flange mounting holes 401 distributed around the flange center hole 402, and is connected to the rotating shaft 3 via a connecting flange 2. The connecting flange 2 is fixed to the outside of the first connecting arm by bolts and nuts. The connecting flange 2 includes a sheet-like flange body with a through hole in the middle. A mounting boss 202 extends axially from one side of the flange body, and this mounting boss is a cylindrical structure coaxial with and having the same diameter as the through hole on the flange body. The flange body also has multiple first mounting holes 201, which are evenly distributed around the mounting boss 202. These first mounting holes 201 correspond to the flange mounting holes 401 on the front cover 4, allowing bolts to pass through and achieving connection and fixation between the connecting flange and the front cover 4. The mounting boss 202 corresponds to the center hole 402 of the flange on the front cover 4. The connecting flange 2 ensures a certain degree of concentricity with the center hole 402 of the flange on the front cover 4 through the outer diameter of the mounting boss 202. The inner diameter of the mounting flange 2 matches the rotating shaft 3 to achieve a stable connection between the rotating shaft 3 and the front cover.

[0031] The second connecting arm is provided with a first central hole 404 and a plurality of first threaded holes 405 and a plurality of slots 403 distributed around the first central hole 404, and the slots 403 all extend radially along the first central hole 404. The first central hole 404 is coaxial with the flange central hole 402 and is rotatably engaged with the rotating shaft 3. In this embodiment, the first threaded holes 405 and slots 403 are staggered on the same circumference. The external gear base 7 is fixed to the inner side of the second connecting arm of the front cover 4. The external gear base 7 is annular and has a third central hole 702 for the rotating shaft 3 to pass through. A plurality of second mounting holes 701 are distributed around the third central hole 702 on the external gear base 7. The second mounting holes 701 correspond to the first threaded holes 405 on the front cover 4. The external gear base 7 is fixed to the inner side of the second connecting arm by screws passing through the second mounting holes 701 and the first threaded holes 405. In this embodiment, the second mounting hole 701 is a stepped hole, the larger section of which can accommodate the screw head, allowing the screw head to be recessed into the stepped hole 701 to reduce the overall size.

[0032] The inner front cover 5 is located between the two connecting arms of the outer front cover 4 and has a second center hole 501 corresponding to the rotating shaft 3. The external gear base 7 is fixedly disposed on the inner side of the second connecting arm of the outer front cover 4, and the internal gear ring 6 is fixedly disposed on the side of the inner front cover 5 near the second connecting arm. Specifically, the inner front cover 5 has multiple second threaded holes 502, and the internal gear ring 6 has corresponding mounting holes, allowing the internal gear ring 6 to be fixed to the inner front cover 5 with screws.

[0033] The rotating shaft 3 passes sequentially through the mounting boss 202, the second center hole 501, the third center hole 702, and the first center hole 404. One end of the rotating shaft 3 extends out from the outside of the second connecting arm, and a handle 9 is rotatably mounted on it. In this embodiment, the rotating shaft 3 has a stepped shaft structure with a large outer diameter at one end and a small outer diameter at the other end, and a step 303 is formed between the large diameter section and the small diameter section. The outer periphery of both ends of the large diameter section is provided with a circlip groove I 301 and a circlip groove II 302, respectively, and the outer periphery of the end of the small diameter section away from the large diameter section is provided with a circlip groove III 304. The rotating shaft 3 achieves connection and positioning with the inner front cover 4 and the outer front cover 5 by axially limiting the outer end face of the two connecting arms of the front cover 4 through the mounting circlips on the circlip grooves I 301 and II 302. The throttle 9 is provided with a fourth center hole 901 that is adapted to the small diameter section of the shaft 3, and is installed and positioned on the shaft 3 by the cooperation of the snap ring installed on the snap ring groove Ⅲ 304 and the step 303. In other embodiments of this utility model, the axial positioning of the throttle and the front cover 4 on the shaft 3 can also be achieved by the retaining ring or other limiting structure.

[0034] The throttle 9 also has at least one curved groove 902 distributed around the fourth center hole 901. This curved groove 902 extends from a near-center position to a far-center position, and its profile at the far-center position is concentric with the fourth center hole. Preferably, the concentric arc segments forming the curved groove 902 have an angle of approximately 10°. This concentric profile design primarily ensures reliable meshing of the internal and external gears. In this embodiment, the...

[0035] The external gear base 7 is designed with at least one radially extending guide groove 703, and each guide groove 703 contains an external gear block 8, which can slide radially within the guide groove 703. The external gear block 8 is a radially separated portion of an external gear that meshes with the internal gear ring 6, comprising a block-shaped body and external teeth 801 distributed on the outer end face of the block-shaped body. The block-shaped body is guided and engaged with the groove wall of the guide groove 703, and the external gear block 8 moves along the extending direction of the guide groove 703, allowing the external teeth 801 to mesh with the internal gear ring 6. In this embodiment, there are three guide grooves 703, evenly distributed on the outer ring of the side end face of the external gear base 7 facing the second connecting arm, and the upper end and side of each guide groove 703 are open. A return spring is also provided between the guide groove 703 and the external gear block 8 to provide radial outward movement power for the external gear block 8. Preferably, the bottom of the guide groove 703 is provided with a first blind hole 704, and one end of the return spring is located in the first blind hole 704, thereby guiding the return spring during extension and retraction. The external gear block 8 is provided with a second blind hole 803, and the other end of the return spring is located in the second blind hole 803. The arrangement of the first blind hole 704 and the second blind hole 803 realizes the limiting and extension guidance of both ends of the return spring.

[0036] The external teeth 801 of the external gear block 8 can extend out of the outer circumferential surface of the external gear base 7 and can mesh with the teeth on the internal gear ring 6 under the action of the return spring. In this embodiment of the present invention, the guide groove 703 and the external gear 8 can be provided in four or more forms, and are evenly distributed along the circumference.

[0037] The external gear block 8 also has an axially extending sliding rod 802 on one side of its block-shaped main body. The sliding rod 802 passes through the slot 403 on the front cover 4 and inserts into the curved groove 902 on the throttle 9. The sliding rod 802 can convert the rotation of the curved groove 902 into linear motion along the slot 403. Since the slot 403 extends radially, when the throttle 9 rotates, the sliding rod 802 can drive the external gear block 8 to slide radially in the guide groove 703, thereby adjusting the radial dimension of the circumference of the external gear 801, so as to achieve engagement, locking, and disengagement with the internal gear ring 6. In this invention, the external gear block 8 and the internal gear ring 6 mesh radially without clearance, which effectively solves the problem of the internal and external gears having a meshing clearance and being unable to lock completely. At the same time, it can eliminate the axial meshing and disengagement space of the internal and external gears, avoiding the friction generated between the tooth surfaces during axial meshing and disengagement, thereby reducing the resistance during the meshing and disengagement of the internal and external gears.

[0038] When the electric drive vehicle of this utility model is in operation, the outer front cover 4 and the inner front cover 5 achieve circumferential anti-rotation engagement through the meshing of the outer gear block 8 and the inner gear ring 6, so that the traction arm 1 and the vehicle body 10 maintain a constant angle. When it is necessary to adjust the angle of the traction arm 1, the throttle 9 is turned, which drives all the outer gear blocks 8 to slide radially inward synchronously, so that the outer gear blocks 8 separate from the inner gear ring 6, and the inner front cover 5 and the outer front cover 4 can rotate relative to each other. After the outer front cover 4 is rotated to the required angle, the throttle 9 is released, and the outer gear blocks 8 slide radially outward under the action of the return spring, and mesh and lock with the inner gear ring 6 again.

[0039] In this embodiment of the present invention, the axial direction is the axial direction of the rotating shaft 3, and the radial direction is the radial direction of the rotating shaft 3.

[0040] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An angle adjustment mechanism for an electric trailer, comprising an outer front cover fixed to the rear end of a tow arm and an inner front cover fixed to the front end of a frame body, the inner front cover being located between a first connecting arm and a second connecting arm at the rear end of the outer front cover, and rotatably connected to the two connecting arms via a pivot; characterized in that: An internal gear ring is fixedly mounted on one side of the inner cover of the vehicle head, and an external gear base is fixedly mounted on the inner side of the second connecting arm. The external gear base has at least one radially extending guide groove in the circumferential direction. An external gear block is slidably mounted in the guide groove. A return spring is also provided between the guide groove and the external gear block. The return spring can push the external gear block to slide outward to mesh with the internal gear ring. A sliding rod extending axially is also provided on one side of the external gear block. The front end of the sliding rod passes through a slot extending radially along the axis of rotation on the second connecting arm and is inserted into a curved groove on the throttle. When the throttle is rotated, the curved groove can drive the sliding rod to move along the slot, thereby adjusting the radial position of the external gear block to mesh with or disengage from the internal gear ring. The throttle is rotated on the outside of the second connecting arm.

2. The angle adjustment mechanism for an electric trailer according to claim 1, characterized in that: One end of the reset spring is located in a blind hole on the external gear block, and the other end is located in a blind hole on the guide groove.

3. The angle adjustment mechanism for an electric trailer according to claim 1, characterized in that: A connecting flange is fixedly provided on the outer side of the first connecting arm, and the rotating shaft is rotatably connected to the first connecting arm through the connecting flange.

4. The angle adjustment mechanism for an electric trailer according to claim 3, characterized in that: The connecting flange includes a flange body and a cylindrical mounting boss formed by extending axially from one side of the flange body. The mounting boss is fitted into a central hole on the first connecting arm, and the rotating shaft passes through the mounting boss.

5. The angle adjustment mechanism for an electric trailer according to claim 1, characterized in that: The external gear base is fixed to the second connecting arm by screws, and the threaded hole on the external gear base for the screw to pass through is a stepped hole that allows the screw head to be recessed.

6. The angle adjustment mechanism for an electric trailer according to claim 1, characterized in that: The rotating shaft extends from the outside of the second connecting arm, and the throttle is rotatably mounted on the rotating shaft.

7. The angle adjustment mechanism for an electric trailer according to claim 6, characterized in that: The pivot includes a small diameter section and a large diameter section. The large diameter section is used to realize the rotational connection between the inner cover and the outer cover of the vehicle. The small diameter section is located outside the second connecting arm. The throttle is pressed against the step formed between the small diameter section and the large diameter section by the stop members on the outer periphery of the small diameter section. Both ends of the large diameter section are also stopped outside the first connecting arm and the second connecting arm by the stop members set on its outer periphery.

8. The angle adjustment mechanism for an electric trailer according to claim 7, characterized in that: The stop is a retaining ring, and a retaining ring groove is provided at a corresponding position on the outer circumference of the rotating shaft.

9. The angle adjustment mechanism for an electric trailer according to any one of claims 1-8, characterized in that: The external gear base has at least three guide grooves evenly distributed along its circumference.

10. The angle adjustment mechanism for an electric trailer according to claim 9, characterized in that: The throttle has a concave-convex structure on its outer periphery to increase friction.

Images