A rotary structure of a semi-automatic electric tow hook and an electric tow hook

Abstract

The utility model discloses a solve the problem that the existing hook needs electric locking, exist unstable, provide a kind of rotation structure and electric hook of semi-automatic electric hook, wherein rotation structure, including power element, transmission structure and locking structure;Wherein the rotary output end of power element is connected with transmission structure, drives transmission structure to rotate;Transmission structure is also connected with locking structure;Locking structure includes locking shaft, locking sleeve and locking column;Locking shaft is rotatably arranged in the inside of hollow locking sleeve, and locking shaft is also connected with transmission structure;Locking sleeve is provided with several square holes, and cylindrical locking column is movably arranged in the hole, and the axis of locking column is parallel with the axis of locking shaft;The size of hole corresponds with the axial section of locking column;Locking shaft is also provided with the structure of protruding or recessed corresponding with locking column, so that locking column moves along the radial direction of locking sleeve in hole when locking shaft rotates, realizes the stable locking or release of external hook.

Description

Technical Field

[0001] This utility model relates to the field of automobile tow hook technology, and in particular to a rotary structure electric tow hook for a semi-automatic electric tow hook. Background Technology

[0002] A trailer hitch, also known as a tow bar, trailer boom, or sometimes simply a tow hook, is a device that connects a vehicle to other vehicles or equipment. It is primarily used for towing other vehicles or goods. Currently, trailer hitches on passenger vehicles are mainly used for towing trailers such as RVs, or for mounting brackets to secure luggage or bicycles, meeting the needs of people on vacations or for outdoor cycling trips.

[0003] Since tow hooks are typically exposed at the rear of a vehicle, they are prone to collisions with passing objects and also affect the vehicle's overall appearance. Therefore, rotating tow hooks were developed, allowing them to be rotated and retracted when not in use, as shown in patent application publication number CN120327155A. However, existing rotating tow hook structures usually control the tow hook's rotation and locking via a motor. Furthermore, when towed, the tow hook experiences pulling forces in multiple directions. This means that the force in the tow hook's rotation direction increases the torque on the motor during locking, affecting the motor's lifespan and the locking effectiveness. Therefore, a physically locking semi-automatic electric tow hook rotation structure and an electric tow hook are needed. Summary of the Invention

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a rotating structure for a semi-automatic electric tow hook and an electric tow hook.

[0005] To solve the above problems, the present invention adopts the following solution:

[0006] A rotating structure for a semi-automatic electric tow hook includes a power component, a transmission structure, and a locking structure. The rotation output end of the power component is connected to the transmission structure, driving the transmission structure to rotate. The transmission structure is also connected to the locking structure. The locking structure includes a locking shaft, a locking sleeve, and a locking pin. The locking sleeve is a hollow cylinder. The locking shaft is rotatably disposed inside the locking sleeve and is also connected to the transmission structure. The locking sleeve has several square openings that penetrate the inner and outer sides of the locking sleeve. The cylindrical locking pin is movably disposed within the openings, with its axis parallel to the axis of the locking shaft. The size of the openings corresponds to the axial section of the locking pin. The locking shaft also has protrusions or recesses corresponding to the locking pin, so that when the locking shaft rotates, the locking pin moves radially within the openings of the locking sleeve.

[0007] Furthermore, the thickness of the opening portion of the locking sleeve is less than the diameter of the locking pin.

[0008] Furthermore, the locking shaft is provided with an arc-shaped groove corresponding to the number of openings.

[0009] Furthermore, the slopes of the arc surfaces on both sides of the arc groove are inconsistent; the slope and arc dimensions of the arc groove near the left or right side correspond to the outer shape of the locking post, while the slope of the arc groove on the other side is gentler than that side.

[0010] Furthermore, the opening on the locking sleeve is provided with an inwardly protruding rib structure, which is located at both ends of the opening and abuts against both ends of the locking pin.

[0011] Furthermore, the transmission structure includes a spline sleeve, a first transmission component, a second transmission component, and a connecting rod; wherein the spline sleeve is connected to the power component via a spline; both ends of the spline sleeve are provided with wing structures protruding radially outward; the inner side of the first transmission component is provided with a first concave hole corresponding to the spline sleeve and its wing structure, and the spline sleeve is embedded in the first concave hole; the first transmission component is also rotatably connected to the connecting rod, and the connecting rod passes through the second transmission component and the locking shaft in sequence before being fixedly connected to the locking sleeve; the second transmission component is rotatably sleeved on the outside of the connecting rod, and the second transmission component is also provided with a first locking structure that engages with the first transmission component, and the other side of the second transmission component is provided with a second locking structure that engages with the locking shaft.

[0012] Furthermore, the first snap-fit ​​structure includes a first convex strip group and a first groove group. The first convex strip group protrudes from one end of the first transmission member near the second transmission member, and the first groove group is correspondingly disposed on the second transmission member. The first convex strip group includes a plurality of convex strips, one end of which points to the axis of the first transmission member. The second groove group includes a plurality of grooves, which match the convex strips.

[0013] Furthermore, in the first group of protrusions, the length of at least one protrusion is different from the lengths of the other protrusions.

[0014] Furthermore, the grooves in the first groove group are fan-shaped grooves.

[0015] An electric tow hook includes the aforementioned rotating structure and a tow hook, wherein one end of the tow hook is rotatably disposed outside a locking sleeve in the rotating structure; the structure in which the tow hook is located outside the locking sleeve is further provided with a locking groove corresponding to a locking pin; the rotating structure is also fixedly connected to an external vehicle frame.

[0016] The beneficial effects of this utility model are as follows:

[0017] By setting a locking structure, the external tow hook can be locked or released. Combined with the operator's manual operation, the tow hook can be rotated semi-automatically, and the locking of the tow hook is relatively stable.

[0018] By incorporating a fan-shaped groove group into the transmission structure, a rotation margin is maintained to prevent vehicle vibrations and other factors from affecting the locking state of the tow hook.

[0019] By including a convex strip of inconsistent length in the first convex strip group, the mating angle between the first rotating component and the second transmission component is ensured;

[0020] By setting a limiting strip extending along a curve on the outside of the second transmission component, and in conjunction with a detection rod and a displacement switch, the rotation angle of the second transmission component can be detected. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the electric tow hook in Example 1;

[0022] Figure 2 This is an exploded view of the electric tow hook in Example 1;

[0023] Figure 3 This is an exploded view of the electric tow hook from another angle in Example 1;

[0024] Figure 4 This is a cross-sectional schematic diagram of the locking structure in Example 1;

[0025] Figure 5 This is a schematic diagram of the locking structure and transmission structure of Example 1;

[0026] Figure 6 This is a schematic diagram of the second transmission component in Embodiment 1;

[0027] Figure 7 Left view of the second transmission component in Embodiment 1

[0028] Figure 8 This is a bottom view of the second transmission component in Embodiment 1;

[0029] Figure 9 This is a schematic diagram of the first transmission component and spline sleeve in Embodiment 1.

[0030] Figure 10 This is a schematic diagram of the locking shaft and locking pin in embodiment 1.

[0031] Figure 11 This is a schematic diagram of the second transmission component from another angle in Embodiment 1.

[0032] Explanation of reference numerals in the attached drawings: Power component 1, Spline 11, Transmission structure 2, Spline sleeve 21, First transmission component 22, Second transmission component 23, Connecting rod 24, First convex strip group 25, First groove group 26, Second convex strip group 27, Second groove group 28, Wing structure 29, First concave hole 210, Detection rod 211, Limiting strip 212, Displacement switch 213, Locking structure 3, Locking shaft 31, Locking sleeve 32, Locking post 33, Opening 34, Arc groove 35, Coil spring 36, Tow hook 4, Locking groove 41. Detailed Implementation

[0033] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0034] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the figures only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0035] Example 1:

[0036] like Figures 1-11As shown, a rotating structure of a semi-automatic electric tow hook includes a power component 1, a transmission structure 2, and a locking structure 3. In this example, the power component 1 is a motor; the rotation output end of the power component 1 is connected to the transmission structure 2, driving the transmission structure 2 to rotate; the transmission structure 2 is also connected to the locking structure 3; the locking structure 3 includes a locking shaft 31, a locking sleeve 32, and a locking pin 33; the locking sleeve 32 is a hollow cylinder; the locking shaft 31 is rotatably disposed inside the locking sleeve 32, and the locking shaft 31 is also connected to the transmission structure 2; the locking sleeve 32 is provided with... The locking sleeve 32 has several square openings 34 that penetrate the inner and outer sides. A cylindrical locking pin 33 is movably disposed within the openings 34, with the axis of the locking pin 33 parallel to the axis of the locking shaft 31. The size of the openings 34 corresponds to the axial section of the locking pin 33. The outer surface of the locking shaft 31 is also provided with a protrusion or recess corresponding to the locking pin 33, so that when the locking shaft 31 rotates, the locking pin 33 moves radially within the openings 34 of the locking sleeve 32. The thickness of the opening portion of the locking sleeve 32 is less than the diameter of the locking pin 33. When the locking shaft 31 rotates, the outer surface of the locking shaft 31 has a protruding or recessed structure. When the locking pin 33 moves against the outer side of the locking shaft 31, it will move within the opening 34 on the locking sleeve 32 as the outer side of the locking shaft 31 undulates. When the locking pin 33 moves to the maximum distance from the axis of the locking sleeve 32 within the opening 34, a part of the locking pin 33 protrudes from the opening 34 onto the outer side of the locking sleeve 32, thereby locking the hook 4 outside the locking sleeve 32. During locking, the locking pin 33 generates radial pressure on the locking shaft 31, making the locking shaft 31 less prone to deflection and the locking effect more stable. In this example, since the power component 1 can only drive the transmission structure 2 and the locking structure 3 to move, while the external hook 4 still needs to be rotated with the help of external force or its own gravity, it is called semi-automatic.

[0037] The locking shaft 31 is provided with arc-shaped grooves 35 corresponding to the number of openings 34. In this example, there are three arc-shaped grooves 35 on the locking shaft 31 and three openings 34 on the locking sleeve 32. The three arc-shaped grooves 35 on the locking shaft 31 are arranged at a 120° angle to each other. The slopes of the arc surfaces on both sides of the arc-shaped groove 35 are not the same. The slope and arc size of the arc-shaped groove 35 on the left or right side correspond to the outer shape of the locking post 33. The slope of the arc-shaped groove 35 on the other side is gentler than that side. This makes it easier for the locking post 33 to roll into or out of the arc-shaped groove 35 along the side with the gentler slope, making the mutual movement between the locking post 33 and the arc-shaped groove 35 smoother and reducing the feeling of jerking.

[0038] The opening 34 on the locking sleeve 32 is provided with an inwardly protruding rib structure. The rib structure is located at both ends of the opening 34 and abuts against both ends of the locking pin 33. On the one hand, this allows the locking pin 33 to move radially along the locking sleeve 32 within the opening 34, and on the other hand, it reduces the sliding friction between the locking sleeve 32 and the locking pin 33.

[0039] The transmission structure 2 includes a spline sleeve 21, a first transmission component 22, a second transmission component 23, and a connecting rod 24. The spline sleeve 21 is connected to the power component 1 via a spline 11. Both ends of the spline sleeve 21 have radially outwardly projecting wing structures 29. The inner side of the first transmission component 22 has a first recess 210 corresponding to the spline sleeve 21 and its wing structures 29. The spline sleeve 21 is embedded in the first recess 210, thus driving the first transmission component 22 to rotate. The first transmission component 22 is also rotatably connected to the connecting rod 24. In this example, one end of the connecting rod 24 is inserted into the first transmission component 23. In the moving part 22, the other end of the connecting rod 24 passes through the second transmission part 23 and the locking shaft 31 in sequence and is fixedly connected to the locking sleeve 32 by a threaded connection. It should be noted that the locking sleeve 32 is hollow inside, but one end of the locking sleeve 32 is closed and the other end is open. The closed end is fixedly connected to the connecting rod 24. The second transmission part 23 is rotatably sleeved on the outside of the connecting rod 24. The second transmission part 23 is also provided with a first snap-fit ​​structure that engages with the first transmission part 22. The other side of the second transmission part 23 is provided with a second snap-fit ​​structure that engages with the locking shaft 31. It should be noted that the second snap-fit ​​structure is similar in principle to the first snap-fit ​​structure. Taking the first snap-fit ​​structure as an example, the first snap-fit ​​structure includes a first protruding strip group 25 and a first groove group 26. The first protruding strip group 25 protrudes from one end of the first transmission member 22 near the second transmission member 23, and the first groove group 26 is correspondingly disposed on the second transmission member 23. The first protruding strip group 25 includes several protruding strips, one end of which points to the axis of the first transmission member 22, or these protruding strips are distributed in a fan-shaped manner along the axis. The second groove group 28 includes several grooves, which match the protruding strips. The grooves in the first groove group 26 are fan-shaped, which provides a certain margin for the first protrusion in the first groove to rotate, so that the first transmission member 22 will not drive the second transmission member 23 to move in the initial stage of forward or reverse rotation, thus avoiding the second transmission member 23 from malfunctioning due to factors such as vehicle vibration. Similarly, a second protrusion group 27 and a second groove group 28 are also provided between the second transmission member 23 and the locking shaft 31. The grooves in the second groove group 28 are fan-shaped, which provides a margin for the rotation of the second transmission member 23 and keeps the locking shaft 31 in a stable state.

[0040] In the first convex strip group 25, the length of at least one convex strip is different from the length of the other convex strips, and the corresponding groove in the first groove group 26 is also different from the shape of the other grooves. In this way, the mating angle between the first rotating member and the second transmission member 23 can be ensured. A limiting strip 212 along a curved trajectory is also provided on the outer side of the second transmission member 23. The limiting strip 212 protrudes from the outer side of the second transmission member 23. The distances from the two ends of the curved trajectory to the end face of the second transmission member 23 near the first transmission member 22 are different. A detection rod 211 is also provided between the second transmission member 23 and the locking sleeve 32. The detection rod 211 is embedded in the slot on the inner side of the locking sleeve 32. The outer side of the detection rod 211 is also provided with a raised protrusion that abuts against the limiting strip 212. As the second transmission member 23 rotates, the detection rod 211 moves along the trajectory of the limiting strip 212 in the axial direction of the second transmission member 23. A displacement switch 213 is also fixedly installed on the vehicle in the area facing the end of the detection rod 211. As the detection rod 211 moves, the end of the detection rod 211 will contact the displacement switch 213 to detect the rotation angle of the second transmission member 23.

[0041] A coil spring 36 is also provided between the locking sleeve 32 and the locking shaft 31, which can reset the initial state between the locking sleeve 32 and the locking shaft 31 and has a certain degree of stability. In this example, the locking pin 33 moves outward to block the external tow hook 4. After the locking pin 33 locks the tow hook 4, the force applied by the locking pin 33 to the locking shaft 31 is mainly radial pressure. At this time, the locking shaft 31 is not easy to rotate. Therefore, only a slight spring force of the coil spring 36 is needed to achieve locking, without the need for external forces such as motors to achieve locking. In this example, the motor, which is the power component 1, only rotates when the tow hook 4 is released from locking, reducing the vehicle's power consumption when the tow hook 4 is normally locked.

[0042] An electric tow hook includes the aforementioned rotating structure and a tow hook 4, wherein one end of the tow hook 4 is rotatably disposed outside the locking sleeve 32 in the rotating structure; the structure in which the tow hook 4 is located outside the locking sleeve 32 is also provided with a locking groove 41 corresponding to the locking pin 33; the rotating structure is also fixedly connected to an external vehicle frame; when the locking pin 33 is embedded in the locking groove 41, the rotation of the tow hook 4 is locked, and vice versa, the tow hook 4 is unlocked, and the angle of the tow hook 4 can be adjusted by manually rotating the tow hook 4.

[0043] During implementation, the locking structure 3 is set to lock or release the external tow hook 4. Combined with the operator's manual operation, the tow hook 4 rotates semi-automatically, and the locked state of the tow hook 4 is relatively stable, without the need for the power component 1 to maintain power output for locking. The transmission structure 2 includes a fan-shaped groove group to retain rotation margin and avoid the impact of vehicle vibration on the locked state of the tow hook 4. The first convex strip group 25 includes a convex strip of inconsistent length to ensure the fitting angle between the first rotating component and the second transmission component 23. The limit strip 212 extending along the curve on the outside of the second transmission component 23, together with the detection rod 211 and the displacement switch 213, enables the detection of the rotation angle of the second transmission component 23.

[0044] The above description is merely a specific example of this utility model and does not constitute any limitation on this utility model. Obviously, those skilled in the art, after understanding the content and principle of this utility model, may make various modifications and changes in form and details without departing from the principle and structure of this utility model. However, these modifications and changes based on the concept of this utility model are still within the protection scope of the claims of this utility model.

Claims

1. A rotating structure for a semi-automatic electric tow hook, characterized in that, It includes a power component (1), a transmission structure (2), and a locking structure (3); wherein the rotation output end of the power component (1) is connected to the transmission structure (2) to drive the transmission structure (2) to rotate; the transmission structure (2) is also connected to the locking structure (3); the locking structure (3) includes a locking shaft (31), a locking sleeve (32), and a locking pin (33); the locking sleeve (32) is a hollow cylinder; the locking shaft (31) is rotatably disposed inside the locking sleeve (32), and the locking shaft (31) is also connected to the transmission structure (2); the locking sleeve (32) The upper part is provided with several square openings (34), which penetrate the inner and outer sides of the locking sleeve (32). The cylindrical locking pin (33) is movably disposed in the opening (34), and the axis of the locking pin (33) is parallel to the axis of the locking shaft (31). The size of the opening (34) corresponds to the axial section of the locking pin (33). The locking shaft (31) is also provided with a protrusion or recess structure corresponding to the locking pin (33), so that when the locking shaft (31) rotates, the locking pin (33) moves radially along the locking sleeve (32) in the opening (34).

2. The rotating structure of a semi-automatic electric tow hook according to claim 1, characterized in that, The thickness of the opening (34) of the locking sleeve (32) is less than the diameter of the locking post (33).

3. The rotating structure of a semi-automatic electric tow hook according to claim 1, characterized in that, The locking shaft (31) is provided with an arc groove (35) corresponding to the number of openings (34).

4. The rotating structure of a semi-automatic electric tow hook according to claim 3, characterized in that, The slopes of the arc surfaces on both sides of the arc groove (35) are not consistent; the slope and arc size of the arc groove (35) near the left or right side correspond to the outer shape of the locking post (33), while the slope of the arc groove (35) on the other side is gentler than that side.

5. The rotating structure of a semi-automatic electric tow hook according to claim 4, characterized in that, The opening (34) on the locking sleeve (32) is provided with an inwardly protruding rib structure, which is located at both ends of the opening (34) and abuts against both ends of the locking post (33).

6. The rotating structure of a semi-automatic electric tow hook according to claim 1, characterized in that, The transmission structure (2) includes a spline sleeve (21), a first transmission component (22), a second transmission component (23), and a connecting rod (24); wherein the spline sleeve (21) is connected to the power component (1) via a spline (11); both ends of the spline sleeve (21) are provided with wing structures (29) protruding radially outward; the inner side of the first transmission component (22) is provided with a first recess (210) corresponding to the spline sleeve (21) and its wing structure (29), and the spline sleeve (21) is embedded in the first recess (210). 0) Inside; the first transmission member (22) is also rotatably connected to the connecting rod (24), and the connecting rod (24) passes through the second transmission member (23) and the locking shaft (31) in sequence and is fixedly connected to the locking sleeve (32); the second transmission member (23) is rotatably sleeved on the outside of the connecting rod (24), and the second transmission member (23) is also provided with a first snap-fit ​​structure that engages with the first transmission member (22), and the other side of the second transmission member (23) is provided with a second snap-fit ​​structure that engages with the locking shaft (31).

7. The rotating structure of a semi-automatic electric tow hook according to claim 6, characterized in that, The first snap-fit ​​structure includes a first convex strip group (25) and a first groove group (26). The first convex strip group (25) protrudes from one end of the first transmission member (22) near the second transmission member (23), and the first groove group (26) is correspondingly disposed on the second transmission member (23). The first convex strip group (25) includes a plurality of convex strips, one end of which points to the axis of the first transmission member (22). The second groove group (28) includes a plurality of grooves, which match the convex strips.

8. The rotating structure of a semi-automatic electric tow hook according to claim 7, characterized in that, In the first convex strip group (25), the length of at least one convex strip is inconsistent with the length of the other convex strips.

9. The rotating structure of a semi-automatic electric tow hook according to claim 7, characterized in that, The grooves in the first groove group (26) are fan-shaped grooves.

10. An electric tow hook, characterized in that, The rotating structure includes any one of claims 1 to 9, and further includes a tow hook (4), wherein one end of the tow hook (4) is rotatably disposed outside the locking sleeve (32) in the rotating structure; the structure in which the tow hook (4) is located outside the locking sleeve (32) is also provided with a locking groove (41) corresponding to the locking post (33); the rotating structure is also attached to an external vehicle frame.

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