Trailer device and car

Abstract

The application discloses a trailer device and a car. The trailer device comprises a main shaft, a hook body, a sliding piece, a first limiting column and a first trigger pin. The hook body is sleeved on the main shaft. The sliding piece is arranged through the main shaft. The first limiting column is arranged through the main shaft. The first trigger pin is arranged through the main shaft, and the first trigger pin has a first avoiding part and abuts against a first guide spiral surface. During rotation of the hook body, the first guide spiral surface pushes the first trigger pin, so that the first avoiding part moves to the first limiting column, the first limiting column can move into the first avoiding part, and the locking of the first limiting column, which extends into the first limiting groove and abuts against the first inner side surface, to the sliding piece is released, so that the sliding piece can continue to move in the first moving direction. Thus, the first trigger pin blocks the first limiting column from moving away from the first limiting groove, and the first trigger pin abuts against the first guide spiral surface, so that the acting force of the first trigger pin on the hook body is small, and the torque for driving the rotation of the hook body is small.

Description

Technical Field

[0001] This application relates to the automotive field, and more specifically to trailer equipment and automobiles. Background Technology

[0002] In existing trailer kits, the motor output shaft drives the lead screw to rotate via a planetary gear assembly, which in turn drives the sliding parts that are threadedly connected to the lead screw to move or drives the hook to rotate.

[0003] When the hook body can rotate, the limiting post blocks the movement of the sliding member along the first translational direction, thus locking the sliding member. At this time, the sliding member acts directly on the limiting post, and the limiting post directly abuts against the inner wall surface of the hook body. Thus, because the lead screw drives the sliding member to move along the first translational direction, the force exerted by the lead screw on the sliding member is large. Therefore, the pressure of the limiting post on the inner wall surface of the hook body is relatively large. Consequently, a relatively large torque is required to rotate the hook body.

[0004] Therefore, this application provides a trailer and a vehicle to at least partially solve the above-mentioned problems. Summary of the Invention

[0005] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed embodiments section. This summary section is not intended to limit the key features and essential technical features of the claimed technical solutions, nor is it intended to determine the scope of protection of the claimed technical solutions.

[0006] To at least partially solve the above-mentioned technical problems, this application provides a trailer assembly, which includes:

[0007] spindle;

[0008] The hook body is rotatably sleeved on the main shaft between a first position and a second position, and the end face of the hook body along the axial direction of the main shaft is provided with a first guide helical surface.

[0009] A sliding member is movably disposed on the main shaft along the axial direction of the main shaft, and a first limiting groove is provided on the outer peripheral surface of the sliding member.

[0010] The first limiting post is movably inserted through the main shaft in the radial direction of the main shaft;

[0011] The first trigger pin is movably inserted through the main shaft along the axial direction of the main shaft. The first trigger pin has a first clearance portion and abuts against the first guide spiral surface.

[0012] During the rotation of the hook body from the second position to the first position, the first guide spiral surface pushes the first trigger pin, causing the first clearance part to move to the first limiting post, thereby enabling the first limiting post to move into the first clearance part, thereby releasing the locking of the first limiting post to the sliding member by the first limiting post that extends into the first limiting groove and abuts against the first inner side surface, so that the sliding member can continue to move along the first moving direction. The first inner side surface is the first limiting groove located upstream of the first limiting post along the first moving direction, and the first moving direction is parallel to the axial direction of the main shaft.

[0013] According to the trailer device of this application, the first trigger pin prevents the first limiting post from moving away from the first limiting groove, while the first trigger pin abuts against the first guide spiral surface. In this way, the force exerted by the first trigger pin on the hook body is small, and the torque driving the hook body to rotate is small.

[0014] Optionally, the end face of the hook body is provided with a second guide spiral surface located to the side of the first guide spiral surface.

[0015] The outer circumferential surface of the slider is provided with a second limiting groove that is circumferentially spaced from the first limiting groove.

[0016] The second limiting post is movably inserted through the main shaft in the radial direction of the main shaft;

[0017] The second trigger pin is movably inserted through the main shaft along the axial direction of the main shaft. The second trigger pin has a second clearance portion and abuts against the second guide spiral surface.

[0018] During the rotation of the hook body from the first position to the second position, the second guide spiral surface pushes the second trigger pin, causing the second clearance part to move to the second limiting post, thereby enabling the second limiting post to move into the second clearance part, thereby releasing the second limiting post that extends into the second limiting groove and abuts against the second inner side surface, thus allowing the sliding member to continue moving along the second moving direction. The second inner side surface is the second limiting groove located upstream of the second limiting post along the second moving direction, and the first moving direction and the second moving direction are opposite.

[0019] Optionally, the trailer assembly further includes an elastic element connected to the first trigger pin and the second trigger pin to apply a force to the first trigger pin to abut against the first guide helical surface, and to apply a force to the second trigger pin to abut against the second guide helical surface.

[0020] Optionally, the end face of the hook body has a first guide groove, and the first guide spiral surface is the bottom surface of the first guide groove.

[0021] Optionally, the end face of the hook body has a second guide groove, and the second guide spiral surface is the bottom surface of the second guide groove.

[0022] Optionally, the end of the first limiting groove along the first moving direction is an opening.

[0023] Optionally, the end of the second limiting groove in the direction opposite to the first moving direction is an opening.

[0024] Optionally, one end face of the slider along the axial direction of the main shaft is recessed to form a sliding guide notch.

[0025] The main shaft is equipped with a main shaft guide notch corresponding to the sliding guide notch.

[0026] The trailer assembly also includes a sliding limit pin, which is located within the sliding guide notch and the main shaft guide notch.

[0027] Optionally, the trailer assembly also includes:

[0028] The lead screw is threadedly connected to the sliding component;

[0029] Internal gear ring, which is connected to the lead screw;

[0030] Sun wheel;

[0031] Planetary gears are rotatably mounted on the hook body;

[0032] The internal gear ring and the sun gear both mesh with the planet gears.

[0033] Optionally, the main shaft has a locking hole, the inner circumferential surface of the hook body has a hook body locking groove, and the outer circumferential surface of the sliding member is provided with a sliding locking groove spaced apart from the first limiting groove along the axial direction of the main shaft.

[0034] The trailer assembly also includes a locking element located within a locking hole;

[0035] The slider can move between the unlocked position and the locked position along the axial direction of the main shaft. When the slider is in the unlocked position, the locking member enters the sliding locking groove and leaves the hook locking groove. The first limiting post is located in the first limiting groove and abuts against the first outer side of the first limiting groove.

[0036] When the hook body is in the first or second position and the slider is in the locked position, the locking member leaves the sliding locking groove and enters the hook body locking groove, and the slider can move along the first moving direction.

[0037] This application also provides a vehicle that includes the aforementioned trailer assembly.

[0038] According to the trailer device of this application, the first trigger pin prevents the first limiting post from moving away from the first limiting groove, while the first trigger pin abuts against the first guide spiral surface. In this way, the force exerted by the first trigger pin on the hook body is small, and the torque driving the hook body to rotate is small. Attached Figure Description

[0039] To make the advantages of this application more readily apparent, the application briefly described above will be described in more detail with reference to the specific embodiments shown in the accompanying drawings. It is to be understood that these drawings depict only typical embodiments of this application and should not be considered as limiting its scope of protection. The application is described and explained with additional features and details through the drawings.

[0040] Figure 1 This is a perspective view of a trailer assembly according to a preferred embodiment of the present application, wherein the hook is located in a first position;

[0041] Figure 2 for Figure 1 A three-dimensional schematic diagram of the trailer assembly, in which the hook is located in the second position;

[0042] Figure 3 for Figure 1 An exploded view of the trailer assembly;

[0043] Figure 4 for Figure 1 A three-dimensional schematic diagram of the sliding component of a trailer hitch;

[0044] Figure 5 for Figure 1 Another perspective view of the sliding component of the trailer assembly;

[0045] Figure 6 for Figure 1 A three-dimensional schematic diagram showing the main shaft and sliding limit pin of the trailer assembly connected together;

[0046] Figure 7 for Figure 1 A three-dimensional schematic diagram showing the connection between the main shaft, trigger pin, and hook limiting post of the trailer assembly;

[0047] Figure 8 for Figure 1 A three-dimensional schematic diagram showing the hook and trigger pin of the trailer hitch connected together;

[0048] Figure 9 for Figure 1 A front view of the main shaft of the trailer assembly, not showing the end cap, hook, and mounting bracket;

[0049] Figure 10 for Figure 9 A schematic diagram of one side of the main shaft of the trailer assembly, not showing the end cap, hook, and mounting bracket;

[0050] Figure 11 for Figure 9 A schematic diagram of the other side of the main shaft of the trailer assembly, not showing the end cap, hook, and mounting bracket;

[0051] Figure 12 for Figure 9 A cross-sectional view of the main shaft of the trailer assembly at the first limiting post, without showing the fixing frame, with the sliding member in the first locking position;

[0052] Figure 13 for Figure 9 A cross-sectional view of the main shaft of the trailer assembly at the second limiting post, without showing the fixing frame, with the sliding member in the first locking position;

[0053] Figure 14 for Figure 9 A cross-sectional view of the main shaft of the trailer assembly at the locking member, without showing the fixing frame, with the sliding member in the first locking position;

[0054] Figure 15 for Figure 9 A cross-sectional view of the main shaft of the trailer assembly at the first limiting post, without showing the fixing frame, with the sliding member in the unlocked position;

[0055] Figure 16 for Figure 9 A cross-sectional view of the main shaft of the trailer assembly at the second limiting post, without showing the fixing frame, with the sliding member in the unlocked position;

[0056] Figure 17 for Figure 9 A cross-sectional view of the main shaft of the trailer assembly at the locking member, without showing the fixing bracket, with the sliding member in the unlocked position;

[0057] Figure 18 for Figure 9 A cross-sectional view of the main shaft of the trailer assembly at the first limiting post, without showing the fixing frame, with the sliding member in the second locking position;

[0058] Figure 19 for Figure 9 A cross-sectional view of the main shaft of the trailer assembly at the second limiting post, without showing the fixing bracket, with the sliding member in the second locking position; and

[0059] Figure 20 for Figure 9 A cross-sectional view of the main shaft of the trailer assembly at the locking member, without showing the fixing bracket, with the sliding member in the second locking position.

[0060] Explanation of reference numerals in the attached figures

[0061] 110: Hook body 111: Hook body locking groove

[0062] 112: First guiding spiral surface; 113: Second guiding spiral surface

[0063] 114: First guide groove; 115: Second guide groove

[0064] 120: Spindle; 121: Locking hole

[0065] 122: Spindle body; 123: Spindle annular flange

[0066] 124: Main spindle guide notch; 130: Sliding component

[0067] 131: First set of segments 132: Second set of segments

[0068] 133: Third segment; 134: First limiting groove

[0069] 135: Second limiting groove; 136: First inner side surface

[0070] 137: Second inner surface 138: Sliding guide notch

[0071] 139: Sliding locking groove; 141: First limiting post

[0072] 142: Second limit pin; 143: First trigger pin

[0073] 144: First avoidance part; 145: Second trigger pin

[0074] 146: Second avoidance part; 147: First elastic element

[0075] 148: Second elastic element; 149: Sliding limit pin

[0076] 150: Planetary gear assembly; 151: Sun gear

[0077] 152: Planetary gears; 153: Internal gear ring

[0078] 154: Planetary gear shaft; 160: Locking element

[0079] 161: Motor output shaft; 162: Lead screw

[0080] 163: Hook body limiting post; 170: Fixing frame

[0081] 171: End cap; 172: Planetary gear shaft retainer

[0082] 173: Connecting plate; 174: Sealing ring

[0083] 175: Wave-shaped washer; 176: Friction plate

[0084] 177: Bushing; 178: Drive Shaft

[0085] 179: Coupling Detailed Implementation

[0086] In the following description, numerous specific details are set forth to provide a more thorough understanding of this application. However, it will be apparent to those skilled in the art that embodiments of this application may be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described to avoid confusion with embodiments of this application.

[0087] The preferred embodiments of this application will now be described with reference to the accompanying drawings. It should be noted that the terms "upper," "lower," and similar expressions used herein are for illustrative purposes only and are not intended to be limiting.

[0088] In this document, ordinal numbers such as “first” and “second” used in this application are merely identifiers and do not have any other meaning, such as a specific order.

[0089] To fully understand the embodiments of this application, a detailed structure will be presented in the following description. Obviously, the implementation of the embodiments of this application is not limited to the specific details familiar to those skilled in the art. Preferred embodiments of this application are described in detail below; however, other embodiments may be available in addition to these detailed descriptions.

[0090] This application provides a trailer hitch. The trailer hitch can be used with automobiles. A automobile can be towed using the trailer hitch.

[0091] Please refer to Figures 1 to 20 The trailer hitch includes a mounting bracket 170, a spindle 120, and fasteners. The mounting bracket 170 is used to attach to the body of a vehicle. The spindle 120 is connected to the mounting bracket 170 via fasteners. The spindle 120 has a spindle through-hole.

[0092] like Figures 3 to 20 As shown, the spindle 120 includes a spindle body 122 and a spindle annular flange 123 located at one end of the spindle body 122. The spindle annular flange 123 is configured to extend radially outward from the outer peripheral surface of the spindle body 122. The spindle annular flange 123 is used to connect to the mounting bracket 170 by fasteners. Figure 9 and Figure 13 As shown, the inner wall of the spindle through hole extends radially outward to form a locking hole 121. The locking hole 121 is a through hole.

[0093] Please return Figures 1 to 20 The trailer assembly also includes a hook 110. The hook 110 has a hook through-hole. The hook through-hole is fitted around the outer periphery of the main shaft body 122. Thus, the hook 110 can rotate around the main shaft 120 in a first position (e.g., Figure 1 The position of the hook body 110 shown) and the second position (as shown) Figure 2The hook 110 can rotate between the positions shown. When the hook 110 is in the first position, the car can be towed by the hook 110. When the hook 110 is in the second position, the hook 110 is in a retracted state. At this time, the hook 110 can be retracted into the car body, thereby protecting the hook 110.

[0094] like Figure 13 As shown, the inner wall of the hook body through hole extends radially outward to form a hook body locking groove 111. Along the axial direction of the main shaft 120, the hook body locking groove 111 is located at the locking hole 121. When the hook body 110 is in the first position and the second position, the hook body locking groove 111 communicates with the locking hole 121.

[0095] like Figure 4 , Figures 12 to 19 As shown, the trailer assembly also includes a sliding member 130. The sliding member 130 has a sleeve-like structure. The sliding member 130 passes through the main shaft through-hole. The sliding member 130 is movable along the axial direction of the main shaft 120. Thus, along the axial direction of the main shaft 120, the sliding member 130 can move between a locked position and an unlocked position. The outer circumferential surface of the sliding member 130 is radially recessed to form a limiting groove and a sliding locking groove 139. Along the axial direction of the main shaft 120, the limiting groove and the sliding locking groove 139 are spaced apart. The sliding locking groove 139 is a circumferentially closed annular structure. The limiting groove includes a first limiting groove 134.

[0096] Specifically, such as Figure 12 As shown, the sliding member 130 includes a first sleeve 131, a second sleeve 132, and a third sleeve 133. Along the axial direction of the main shaft 120, the first sleeve 131, the second sleeve 132, and the third sleeve 133 are arranged sequentially. The second sleeve 132 is located between the first sleeve 131 and the third sleeve 133, and connects the first sleeve 131 and the third sleeve 133 respectively. The outer diameter of the second sleeve 132 is smaller than the outer diameter of the first sleeve 131 and the outer diameter of the third sleeve 133. Thus, a sliding locking groove 139 is formed at the second sleeve 132.

[0097] Please return Figure 13 The trailer assembly also includes a locking element 160. The locking element 160 may be a spherical structure. The locking element 160 is located within the locking hole 121.

[0098] Please refer to Figure 13 and Figure 19 When the sliding member 130 is in the locked position and the hook body 110 is in the first or second position, the locking member 160 disengages from the sliding locking groove 139 and enters the hook body locking groove 111. At this time, the locking member 160 is located in the connected hook body locking groove 111 and locking hole 121. The locking member 160 can lock the hook body 110, preventing the hook body 110 from rotating around the main shaft 120.

[0099] Specifically, such as Figures 12 to 14 As shown, the locking position of the slider 130 includes a first locking position. When the slider 130 is in the first locking position and the hook 110 is in the first or second position, the outer peripheral surface of the connection between the third sleeve 133 and the second sleeve 132 contacts the locking member 160 to support the locking member 160 within the communicating locking hole 121 and the hook locking groove 111.

[0100] like Figures 15 to 17 As shown, when the slider 130 is in the unlocked position, the sliding locking groove 139 is located at the locking hole 121, and the sliding locking groove 139 connects to the locking hole 121. Thus, the locking member 160 can enter the sliding locking groove 139 and exit the hook locking groove 111. At this time, the locking member 160 is located in both the sliding locking groove 139 and the locking hole 121, thereby releasing the lock on the hook body 110. Thus, the hook body 110 can rotate around the main shaft 120.

[0101] like Figures 8 to 18 As shown, the trailer assembly also includes a limiting post. The limiting post includes a first limiting post 141. The limiting groove includes a first limiting groove 134. The main shaft 120 also includes a limiting through hole. The axial direction of the limiting through hole extends along the radial direction of the main shaft 120 and communicates with the main shaft through hole. The limiting through hole is located at the annular flange 123 of the main shaft. The limiting through hole includes a first limiting through hole. The first limiting post 141 is movably disposed within the first limiting through hole along the axial direction of the first limiting through hole.

[0102] like Figure 12 As shown, when the slider 130 is in the first locked position, the first limiting post 141 extends into the first limiting groove 134.

[0103] It should be noted that, please refer to Figure 12 The sliding locking groove 139 is connected to the outer peripheral surface of the slider 130 via an arc surface or a bevel. The limiting groove is connected to the outer peripheral surface of the slider 130 via an arc surface or a bevel. Both ends of the limiting post are provided with rounded corners or chamfers.

[0104] Please continue to refer to this. Figures 8 to 20 The trailer assembly also includes a trigger pin. The spindle annular flange 123 is provided with a trigger mounting hole. The trigger mounting hole is a through hole. The axial direction of the trigger mounting hole is parallel to the axial direction of the spindle 120. The trigger mounting hole and the corresponding limiting through hole are connected. The trigger pin is movably inserted into the trigger mounting hole along its axial direction.

[0105] Please continue to refer to this. Figures 8 to 20One end face of the hook body 110 along the axial direction of the main shaft 120 is provided with a guide helical surface. The helical axis of the guide helical surface is approximately coaxial with the axis of the main shaft 120. Figure 12 As shown, the guide spiral surface includes a first guide spiral surface 112. The trigger pin includes a first trigger pin 143. The trigger mounting hole includes a first trigger mounting hole. The first trigger mounting hole communicates with a first limiting through hole. The first trigger pin 143 is movably disposed in the first trigger mounting hole along the axial direction of the first trigger mounting hole.

[0106] Please continue to refer to this. Figure 12 The first trigger pin 143 is located on the side of the first limiting post 141 away from the slider 130. The first trigger pin 143 abuts against the first guide spiral surface 112.

[0107] During the rotation of the hook body 110 around the main shaft 120 in the first and second positions, the first trigger pin 143 always abuts against the first guide spiral surface 112. The action of the first guide spiral surface 112 on the first trigger pin 143 causes the first trigger pin 143 to move along the axial direction of the main shaft 120.

[0108] The trigger pin has a clearance portion. The clearance portion can be configured such that the outer peripheral surface of the trigger pin is radially recessed inward. The clearance portion can be configured as a circumferentially closed annular structure. The clearance portion is connected to the outer peripheral surface of the trigger pin via an arc surface or a bevel. The first trigger pin 143 has a first clearance portion 144.

[0109] like Figure 12 As shown, when the hook body 110 is in the second position, the first clearance part 144 and the first limiting post 141 are misaligned. The first trigger pin 143 blocks the movement of the first limiting post 141 along the axial direction of the first limiting through hole, thereby preventing the first limiting post 141 from leaving the first limiting groove 134.

[0110] Please refer to Figure 12 and Figure 18 During the rotation of the hook body 110 from the second position to the first position, the first guide spiral surface 112 pushes the first trigger pin 143, causing the first clearance part 144 to move to the first limiting post 141. At this time, the first clearance part 144 connects to the first limiting through hole. The first limiting post 141 can move into the first clearance part 144, thereby leaving the first limiting groove 134.

[0111] Please return Figure 15When the slider 130 is in the unlocked position, the first limiting post 141 extends into the first limiting groove 134 and abuts against the first inner surface 136. The first inner surface 136 is located at one end of the first limiting groove 134 along the first moving direction D1. The first inner surface 136 is located upstream of the first limiting post 141 along the first moving direction D1. In this way, the first inner surface 136 can block the first limiting post 141, thereby preventing the slider 130 from continuing to move along the first moving direction D1. The first moving direction D1 is parallel to the axial direction of the main shaft 120.

[0112] As mentioned above, Figures 15 to 18 As shown, when the slider 130 is in the unlocked position, the hook 110 can rotate around the main shaft 120. At this time, rotating the hook 110 to the first position allows the first limiting post 141 to move into the first clearance portion 144 and then away from the first limiting groove 134. This releases the first limiting post 141 from locking the slider 130, allowing the slider 130 to continue moving along the first moving direction D1.

[0113] like Figures 18 to 20 As shown, the locking position of the slider 130 also includes a second locking position. When the trailer is not in use, the hook 110 is in the second position and the slider 130 is in the first locking position. At this time, when the slider 130 moves along the first moving direction D1, it passes through the first locking position, the unlocking position, and the second locking position in sequence. When the slider 130 is in the second locking position, the first limiting post 141 is located outside the first limiting groove 134. The outer peripheral surface of the first sleeve 131 contacts the first limiting post 141 so that the first limiting post 141 extends into the first clearance portion 144. When the slider 130 is in the second locking position, the locking member 160 contacts the outer peripheral surface of the connection between the first sleeve 131 and the second sleeve 132, thereby supporting the locking member 160 in the communicating locking hole 121 and the hook locking groove 111 to lock the hook 110 and prevent the hook 110 from rotating.

[0114] When the trailer is not in use, such as Figure 2 , Figures 12 to 14 As shown, the hook 110 is in the second position, and the slider 130 is in the first locked position. If a trailer hitch is needed, the slider 130 can be moved to the unlocked position along the first moving direction D1. At this time, as... Figures 15 to 17 As shown, the locking member 160 moves into the sliding locking groove 139, and the first limiting post 141 abuts against the first inner side surface 136 of the first limiting groove 134. In this way, the hook body 110 can rotate, and the first limiting post 141 prevents the sliding member 130 from continuing to move along the first moving direction D1.

[0115] The hook body 110 is rotated from the second position to the first position. During this process, the first guide spiral surface 112 acts on the first trigger pin 143, causing the first trigger pin 143 to move so that the first clearance part 144 moves to the first limiting post 141, thereby releasing the obstruction of the first trigger pin 143 on the first limiting post 141, and allowing the first limiting post 141 to extend into the first clearance part 144. In this way, the first limiting post 141 no longer obstructs the slider 130 from continuing to move along the first moving direction D1. At this time, the slider 130 continues to move along the first moving direction D1. During this process, the slider 130 acts on the first limiting post 141, causing the first limiting post 141 to move away from the first limiting groove 134 and contact the outer peripheral surface of the first sleeve segment 131, and extend into the second clearance part 146. At the same time, the locking member 160 is moved away from the sliding locking groove 139 to contact the outer peripheral surface of the connection between the first sleeve 131 and the second sleeve 132, thereby supporting the locking member 160 on the communicating locking hole 121 and the hook locking groove 111 to lock the hook 110 in the first position and prevent the hook 110 from rotating.

[0116] In this embodiment, the first trigger pin 143 abuts against the first guide spiral surface 112. In this way, the first trigger pin 143 prevents the first limiting post 141 from moving away from the first limiting groove 134. As a result, the force exerted by the first trigger pin 143 on the hook body 110 is small, and the torque that drives the hook body 110 to rotate is small.

[0117] Optionally, such as Figure 4 , Figure 8 , Figures 12 to 19 As shown, the guide spiral surface also includes a second guide spiral surface 113. The second guide spiral surface 113 is located to the side of the first guide spiral surface 112. The limiting groove also includes a second limiting groove 135. The second limiting groove 135 and the first limiting groove 134 are circumferentially spaced around the axis of the main shaft 120.

[0118] like Figure 13 As shown, the limiting post also includes a second limiting post 142. The second limiting post 142 and the first limiting post 141 are circumferentially spaced around the axis of the main shaft 120. The limiting through hole includes a second limiting through hole. The second limiting post 142 is movably disposed in the second limiting through hole along the axial direction of the second limiting through hole.

[0119] Please continue to refer to this. Figure 13The trigger pin includes a second trigger pin 145. The second trigger pin 145 and the first trigger pin 143 are circumferentially spaced around the axis of the main shaft 120. The trigger mounting hole includes a second trigger mounting hole. The second trigger mounting hole communicates with a second limiting through hole. The second trigger pin 145 is movably disposed in the second trigger mounting hole along the axial direction of the second trigger mounting hole. The second trigger pin 145 has a second clearance portion 146. The second trigger pin 145 abuts against a second guide helical surface 113.

[0120] like Figure 13 As shown, when the slider 130 is in the first locked position, the second limiting post 142 contacts the outer peripheral surface of the connection between the first sleeve 131 and the second sleeve 132.

[0121] like Figure 16 As shown, when the slider 130 is in the unlocked position, the second limiting post 142 extends into the second limiting groove 135 and abuts against the second inner surface 137. The second inner surface 137 is located at one end of the second limiting groove 135 along the second moving direction D2. This second inner surface 137 is located upstream of the second limiting post 142 along the second moving direction D2. In this way, the second inner surface 137 can block the second limiting post 142, thereby preventing the slider 130 from continuing to move along the second moving direction D2. The second moving direction D2 is opposite to the first moving direction D1.

[0122] like Figure 19 As shown, when the slider 130 is in the second locked position, the second limiting post 142 extends into the second limiting groove 135.

[0123] like Figure 18 and Figure 19 As shown, when the trailer hitch is in use, the hook 110 is in the first position and the slider 130 is in the second locked position. If it is necessary to retract the trailer hitch, the slider 130 can be moved to the unlocked position along the second moving direction D2. At this time, as... Figure 16 As shown, the locking member 160 moves to the sliding locking groove 139, and the second limiting post 142 abuts against the second inner side surface 137 of the second limiting groove 135. In this way, the hook body 110 can rotate, and the second limiting post 142 prevents the sliding member 130 from continuing to move along the second moving direction D2.

[0124] Please refer to Figure 16 and Figure 13 This causes the hook body 110 to rotate from the first position to the second position. At this time, the action of the second guide spiral surface 113 on the second trigger pin 145 causes the second trigger pin 145 to move, thereby moving the second clearance part 146 to the second limit post 142, so as to release the obstruction of the second trigger pin 145 on the second limit post 142, so that the second limit post 142 can extend into the second clearance part 146.

[0125] Thus, the second limiting post 142 no longer obstructs the sliding member 130 from continuing to move along the second moving direction D2. At this time, the sliding member 130 continues to move along the second moving direction D2. During this process, the action of the sliding member 130 on the second limiting post 142 causes the second limiting post 142 to move away from the second limiting groove 135 and contact the outer peripheral surface of the connection between the first sleeve segment 131 and the second sleeve segment 132, and extend into the second clearance part 146. At the same time, the locking member 160 moves away from the sliding locking groove 139 to contact the outer peripheral surface of the connection between the second sleeve segment 132 and the third sleeve segment 133, thereby supporting the locking member 160 on the communicating locking hole 121 and the hook locking groove 111 to lock the hook 110 in the second position and prevent the hook 110 from rotating. Therefore, the second trigger pin 145 abuts against the second guide spiral surface 113, and the force exerted by the second trigger pin 145 on the hook body 110 is small, resulting in a smaller torque that drives the hook body 110 to rotate.

[0126] It is understood that, in the embodiment not shown, when the hook is in the second position, the car can be towed by the hook. When the hook is in the first position, the hook is in a retracted state.

[0127] Optionally, such as Figures 8 to 19 As shown, the trailer assembly also includes elastic elements. These elastic elements include a first elastic element 147 and a second elastic element 148. The first elastic element 147 is connected to the first trigger pin 143 and the fixing bracket 170 to apply a force to the first trigger pin 143, causing it to abut against the first guide spiral surface 112. The second elastic element 148 is connected to the first trigger pin 143 and the fixing bracket 170 to apply a force to the second trigger pin 145, causing it to abut against the second guide spiral surface 113. This facilitates the abutment of the trigger pin against the guide spiral surface. Furthermore, the elasticity of the elements is low, reducing the pressure of the trigger pin on the hook body 110.

[0128] like Figure 8 , Figure 9 and Figure 16 As shown, the end face of the hook body 110 is recessed along the axial direction of the main shaft 120 to form a guide groove. The guide groove includes a first guide groove 114 and a second guide groove 115. The first guide helical surface 112 is the bottom surface of the first guide groove 114. The second guide helical surface 113 is the bottom surface of the second guide groove 115. In this way, the first trigger pin 143 extends into the first guide groove 114, and the contact between the first trigger pin 143 and the first guide helical surface 112 is more stable. The second trigger pin 145 extends into the second guide groove 115, and the contact between the second trigger pin 145 and the second guide helical surface 113 is more stable.

[0129] Optionally, such asFigure 8 and Figure 12 As shown, the end of the first limiting groove 134 along the first moving direction D1 is open. This opening connects to the sliding locking groove 139. This facilitates the machining of the first limiting groove 134.

[0130] Optionally, such as Figure 13 As shown, the end of the second limiting groove 135 along the second moving direction D2 is open. That is, the second limiting groove 135 penetrates the first sleeve segment 131 along the second moving direction D2. This facilitates the machining of the second limiting groove 135.

[0131] like Figure 11 As shown, the end face of the slider 130 along the second moving direction D2 is recessed along the axial direction of the main shaft 120 to form a sliding guide notch 138. The main shaft 120 is provided with a main shaft guide notch 124 corresponding to the sliding guide notch 138. When the slider 130 passes through the main shaft 120, the sliding guide notch 138 and the main shaft guide notch 124 are opposite to each other to form a complete circular hole.

[0132] like Figure 3 , Figure 6 and Figure 11 As shown, the trailer assembly also includes a sliding limit pin 149. The sliding limit pin 149 is disposed within the sliding guide notch 138 and the main shaft guide notch 124. Thus, the sliding limit pin 149 can prevent the sliding member 130 from rotating about the axis of the main shaft 120. The sliding limit pin 149 can guide the movement of the sliding member 130 along the axial direction of the main shaft 120, making the movement of the sliding member 130 smoother. Furthermore, the sliding guide notch 138 and the main shaft guide notch 124 facilitate the installation of the sliding limit pin 149.

[0133] Please return Figure 3 The trailer assembly also includes a motor output shaft 161, a drive shaft 178, a lead screw 162, a planetary gear assembly 150, an end cover 171, a planetary gear shaft retainer 172, a connecting plate 173, a bushing 177, and a coupling 179. The planetary gear assembly 150 includes an internal gear ring 153, a sun gear 151, planetary gears 152, and a planetary gear shaft 154.

[0134] like Figures 1 to 3 As shown, the motor output shaft 161 is rotatably mounted through the mounting bracket 170. The motor output shaft 161 is used to connect to a drive component, such as a drive motor of an automobile. Alternatively, the motor output shaft 161 may be the output shaft of a drive motor.

[0135] Please refer to Figures 1 to 20 The end cap 171 is connected to the hook body 110 by fasteners to form the planetary gear cavity.

[0136] like Figure 12As shown, the slider 130 has a threaded through hole. A lead screw 162 is threaded into the threaded through hole of the slider 130. The lead screw 162 passes through a bushing 177 into the main shaft 120. One end of the lead screw 162 extends outside the main shaft 120 and into the planetary gear cavity. A connecting plate 173 is located within the planetary gear cavity and is connected to (e.g., via a spline) the lead screw 162. Thus, the lead screw 162 and the connecting plate 173 rotate together.

[0137] like Figure 4 and Figure 7 As shown, both the planetary gear assembly 150 and the planetary gear shaft holder 172 are located within the planetary gear cavity. The internal gear ring 153 is connected to the connecting plate 173 so that it rotates together with the connecting plate 173.

[0138] like Figure 3 , Figures 9 to 12 As shown, a drive shaft 178 passes through a lead screw 162 and extends into the planetary gear cavity. The drive shaft 178 is connected to the sun gear 151 and rotates together with it. Planetary gears 152 are rotatably mounted on a planetary gear shaft holder 172 via a planetary gear shaft 154. The planetary gear shaft holder 172 is fixedly connected to an end cover 171. Thus, the planetary gear shaft holder 172 and the end cover 171 rotate together. The planetary gears 152 mesh with the sun gear 151 and the internal gear ring 153.

[0139] like Figure 3 and Figure 9 As shown, the motor output shaft 161 is connected to the drive shaft 178 via a coupling 179. Thus, the motor output shaft 161 can drive the drive shaft 178 to rotate, thereby driving the planetary gear assembly. When the hook body 110 is locked and cannot rotate, and neither the first limiting pin 141 nor the second limiting pin 142 obstructs the movement of the sliding member 130 along the axial direction of the main shaft 120, the internal gear ring 153 drives the lead screw 162 to rotate. At this time, due to the action of the sliding limiting pin 149, the sliding member 130 moves along the circumferential direction of the main shaft 120.

[0140] When the hook body 110 can rotate and the first limiting post 141 blocks the sliding member 130 from moving along the first moving direction D1, or when the hook body 110 can rotate and the second limiting post 142 blocks the sliding member 130 from moving along the second moving direction D2, the planetary gear 152 drives the planetary gear shaft fixing frame 172 to rotate, and then drives the hook body 110 to rotate through the end cover 171.

[0141] Thus, when the trailer is not in use, the hook 110 is in the second position and the slider 130 is in the first locked position to lock the hook 110. If the trailer needs to be used, the motor output shaft 161 can be rotated around the first rotation direction, thereby sequentially performing the actions of releasing the lock on the hook 110, rotating the hook 110 from the second position to the first position, and locking the hook 110 in the first position.

[0142] When the trailer is in use, the hook 110 is in the first position and the slider 130 is in the second locked position to lock the hook 110. If it is necessary to retract the trailer, the motor output shaft 161 can be rotated in the opposite direction to the first rotation direction, thereby sequentially performing the actions of releasing the lock on the hook 110, rotating the hook 110 from the first position to the second position, and locking the hook 110 in the second position.

[0143] Alternatively, please refer to Figure 3 , Figure 7 and Figure 9 The trailer hitch also includes a hook limiting post 163, a sealing ring 174, a wave-shaped washer 175, and a friction plate 176. The axial direction of the hook limiting post 163 is parallel to the axial direction of the main shaft 120. The hook limiting post 163 passes through the annular flange 123 of the main shaft and extends to the side of the annular flange 123 near the hook 110. The hook limiting post 163 prevents the hook 110 in the first position from rotating away from the second position. It is understood that the vehicle body or the main shaft 120 is provided with a structure for preventing the hook in the second position from rotating away from the first position.

[0144] The sealing ring 174, the corrugated washer 175, and the friction plate 176 are arranged sequentially along the axial direction of the main shaft 120. The sealing ring 174, the corrugated washer 175, and the friction plate 176 are all fitted onto the main shaft body 122. The sealing ring 174 is located on the side of the corrugated washer 175 closest to the connecting plate 173. The sealing ring 174 is located between the hook body 110 and the end cap 171 to seal the gap between the hook body 110 and the end cap 171.

[0145] This application also provides a vehicle. The vehicle includes the aforementioned trailer assembly.

[0146] In this embodiment, the vehicle includes the aforementioned trailer hitch. The first trigger pin 143 abuts against the first guide spiral surface 112. Thus, the first trigger pin 143 prevents the first limiting post 141 from moving away from the first limiting groove 134. As a result, the force exerted by the first trigger pin 143 on the hook body 110 is small, and the torque driving the hook body 110 to rotate is small.

[0147] This application has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit this application to the scope of the described embodiments. Furthermore, those skilled in the art will understand that this application is not limited to the above embodiments, and many more variations and modifications can be made based on the teachings of this application, all of which fall within the scope of protection claimed in this application. The scope of protection of this application is defined by the appended claims and their equivalents.

[0148] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for descriptive purposes only and is not intended to limit the scope of this application. Terms such as “component” as used herein may refer to a single part or a combination of multiple parts. Terms such as “installation” or “installation” as used herein may refer to a component being directly attached to another component or a component being attached to another component via an intermediary. A feature described in one embodiment herein may be applied, alone or in combination with other features, to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.

Claims

1. A trailer assembly, characterized in that, The trailer assembly includes: spindle; The hook body is rotatably sleeved on the main shaft between a first position and a second position, and the end face of the hook body along the axial direction of the main shaft is provided with a first guide helical surface; A sliding member is movably disposed on the main shaft along the axial direction of the main shaft, and a first limiting groove is provided on the outer peripheral surface of the sliding member; The first limiting post is movably inserted through the main shaft in the radial direction of the main shaft; A first trigger pin is movably inserted through the main shaft along the axial direction of the main shaft. The first trigger pin has a first clearance portion and abuts against the first guide spiral surface. During the rotation of the hook from the second position to the first position, the first guide spiral surface pushes the first trigger pin, causing the first clearance part to move to the first limiting post, thereby enabling the first limiting post to move into the first clearance part, thereby releasing the locking of the first limiting post, which extends into the first limiting groove and abuts against the first inner side, on the sliding member, so that the sliding member can continue to move along the first moving direction. The first inner side is the first limiting groove located upstream of the first limiting post along the first moving direction, and the first moving direction is parallel to the axial direction of the main shaft.

2. The trailer assembly according to claim 1, characterized in that, The end face of the hook body is provided with a second guide spiral surface located to the side of the first guide spiral surface. The outer peripheral surface of the slider is provided with a second limiting groove that is circumferentially spaced from the first limiting groove. The second limiting post is movably inserted through the main shaft in the radial direction of the main shaft; The second trigger pin is movably inserted through the main shaft along the axial direction of the main shaft. The second trigger pin has a second clearance portion and abuts against the second guide spiral surface. During the rotation of the hook from the first position to the second position, the second guide spiral surface pushes the second trigger pin, causing the second clearance part to move to the second limiting post, thereby enabling the second limiting post to move into the second clearance part, thereby releasing the second limiting post that extends into the second limiting groove and abuts against the second inner side surface, thus allowing the sliding member to continue moving along the second moving direction. The second inner side surface is the second limiting groove located upstream of the second limiting post along the second moving direction, and the first moving direction and the second moving direction are opposite.

3. The trailer assembly according to claim 2, characterized in that, The trailer assembly further includes an elastic element connected to the first trigger pin and the second trigger pin, for applying a force to the first trigger pin to abut against the first guide spiral surface, and applying a force to the second trigger pin to abut against the second guide spiral surface.

4. The trailer assembly according to claim 1, characterized in that, The end face of the hook has a first guide groove, and the first guide spiral surface is the bottom surface of the first guide groove.

5. The trailer assembly according to claim 2, characterized in that, The end face of the hook has a second guide groove, and the second guide spiral surface is the bottom surface of the second guide groove.

6. The trailer assembly according to claim 1, characterized in that, The end of the first limiting groove along the first moving direction is open.

7. The trailer assembly according to claim 2, characterized in that, The end of the second limiting groove in the direction opposite to the first moving direction is open.

8. The trailer assembly according to claim 1, characterized in that, One end face of the slider is recessed along the axial direction of the main shaft to form a sliding guide notch. The main shaft is provided with a main shaft guide notch corresponding to the sliding guide notch. The trailer assembly also includes a sliding limit pin, which is disposed within the sliding guide notch and the main shaft guide notch.

9. The trailer assembly according to claim 1, characterized in that, The trailer assembly also includes: A lead screw, which is threadedly connected to the sliding member; An internal gear ring, which is connected to the lead screw; Sun wheel; Planetary gears, which are rotatably disposed on the hook body; The internal gear ring and the sun gear both mesh with the planet gears.

10. The trailer assembly according to claim 1, characterized in that, The main shaft has a locking hole, the inner circumferential surface of the hook body has a hook body locking groove, and the outer circumferential surface of the sliding member is provided with a sliding locking groove spaced apart from the first limiting groove along the axial direction of the main shaft. The trailer assembly also includes a locking element located within the locking hole; The slider can move between the unlocked position and the locked position along the axial direction of the main shaft. When the slider is in the unlocked position, the locking member enters the sliding locking groove and leaves the hook locking groove. The first limiting post is located in the first limiting groove and abuts against the first outer side of the first limiting groove. When the hook is in the first position or the second position and the slider is in the locked position, the locking member leaves the sliding locking groove and enters the hook locking groove, and the slider can move along the first moving direction.

11. A car, characterized in that, The vehicle includes: The trailer assembly according to any one of claims 1 to 10.

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