Trailer device and automobile

Abstract

The invention discloses a trailer device and an automobile. 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 penetrates through the main shaft; the first limiting column penetrates through the main shaft; the first trigger pin is arranged on the main shaft in a penetrating manner, is provided with a first avoiding part, and is propped against the first guide spiral surface; in the rotating process of the hook body, the first guide spiral face pushes the first trigger pin so that the first receding part can move to the first limiting column, the first limiting column can move into the first receding part, and then locking of the first limiting column stretching into the first limiting groove and abutting against the first inner side face on the sliding piece is relieved; therefore, the sliding part can continue to move in the first moving direction. Therefore, the first trigger pin stops 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 hook body to rotate is small.

Description

Technical Field

[0001] The present invention relates to the automotive field, in particular to a trailer device and an automobile. Background Art

[0002] In the existing trailer device, the motor output shaft drives the lead screw to rotate through the planetary gear assembly, thereby driving the sliding member threadedly connected to the lead screw to move or driving the hook body to rotate.

[0003] When the hook body is able to rotate, the limit post blocks the movement of the sliding member along the first translation direction to lock the sliding member. At this time, the sliding member directly acts on the limit post, and the limit post directly abuts against the inner wall surface of the hook body. In this way, since the lead screw drives the sliding member to move along the first translation direction, the force of the lead screw on the sliding member is large. Therefore, the pressure of the limit post on the inner wall surface of the hook body is relatively large. In this way, the torque required to rotate the hook body is relatively large.

[0004] To this end, the present application provides a trailer device and a vehicle to at least partially solve the above problems. Summary of the invention

[0005] A series of simplified concepts are introduced in the Summary of the Invention section, which will be further described in detail in the Specific Embodiments section. The Summary of the Invention section of this application does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the scope of protection of the claimed technical solution.

[0006] In order to at least partially solve the above technical problems, the present application provides a trailer device, the trailer device comprising:

[0007] Spindle;

[0008] A hook body, the hook body is rotatably sleeved on the main shaft between a first position and a second position, and a first guiding helical surface is provided on an end surface of the hook body along the axial direction of the main shaft;

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

[0010] A first limiting column, the first limiting column is movably disposed on the main shaft along the radial direction of the main shaft;

[0011] A first trigger pin, the first trigger pin is movably disposed on the main shaft along the axial direction of the main shaft, the first trigger pin has a first avoidance portion, and the first trigger pin abuts against the first guide helical surface;

[0012] During the process of the hook body rotating from the second position to the first position, the first guide spiral surface pushes the first trigger pin to make the first avoidance portion move to the first limit column, so that the first limit column can move into the first avoidance portion, thereby releasing the lock of the sliding member by the first limit column extending into the first limit groove and abutting 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 limit groove located upstream of the first limit column 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 the present application, the first trigger pin blocks the first limit column from moving away from the first limit groove, and 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 surface of the hook body is provided with a second guiding helical surface located on the side of the first guiding helical surface.

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

[0016] A second limiting column, the second limiting column is movably disposed on the main shaft along the radial direction of the main shaft;

[0017] A second trigger pin, the second trigger pin is movably disposed on the main shaft along the axial direction of the main shaft, the second trigger pin has a second avoidance portion, and the second trigger pin abuts against the second guide helical surface;

[0018] During the process of the hook body rotating from the first position to the second position, the second guide spiral surface pushes the second trigger pin to make the second avoidance portion move to the second limit column, so that the second limit column can move into the second avoidance portion, thereby releasing the lock of the sliding member by the second limit column extending into the second limit groove and abutting against the second inner surface, so that the sliding member can continue to move along the second moving direction. The second inner surface is the second limit groove located upstream of the second limit column along the second moving direction, and the first moving direction and the second moving direction are opposite.

[0019] Optionally, the trailer device also includes an elastic member connected to the first trigger pin and the second trigger pin to apply a force to the first trigger pin so that the first trigger pin abuts against the first guide helical surface, and to apply a force to the second trigger pin so that the second trigger pin abuts against the second guide helical surface.

[0020] Optionally, the end surface 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 surface 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 open.

[0023] Optionally, an end of the second limiting groove along a direction opposite to the first moving direction is open.

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

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

[0026] The trailer device also includes a sliding limit pin, which is arranged in the sliding guide notch and the main shaft guide notch.

[0027] Optionally, the trailer device further comprises:

[0028] A lead screw, the lead screw being threadedly connected to the sliding member;

[0029] An inner gear ring connected to the lead screw;

[0030] Sun gear;

[0031] A planetary gear, the planetary gear is rotatably disposed on the hook body;

[0032] The inner ring gear and the sun gear are meshed with the planetary 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 device also includes a locking member, which is located in the locking hole;

[0035] The sliding member can move between an unlocking position and a locking position along the axial direction of the main shaft. When the sliding member is in the unlocking position, the locking member enters the sliding locking groove and leaves the hook body locking groove. The first limiting column is located in the first limiting groove and abuts against the first outer side surface of the first limiting groove.

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

[0037] The present application also provides a car, which includes the aforementioned trailer device.

[0038] According to the trailer device of the present application, the first trigger pin blocks the first limit column from moving away from the first limit groove, and 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to make the advantages of the present application more easily understood, the present application briefly described above will be described in more detail by referring to the specific embodiments shown in the accompanying drawings. It can be understood that these drawings only depict typical embodiments of the present application and therefore should not be considered as limiting the scope of protection thereof. The present application is described and explained with additional characteristics and details through the accompanying drawings.

[0040] Figure 1 It is a three-dimensional schematic diagram of a trailer device according to a preferred embodiment of the present application, wherein the hook body is located in a first position;

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

[0042] Figure 3 for Figure 1 An exploded schematic diagram of a trailer device;

[0043] Figure 4 for Figure 1 A three-dimensional schematic diagram of a sliding member of a trailer device;

[0044] Figure 5 for Figure 1 Another perspective schematic diagram of the sliding member of the trailer device;

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

[0046] Figure 7 for Figure 1 A three-dimensional schematic diagram of the main shaft of the trailer device, the trigger pin and the hook body limit column connected together;

[0047] Figure 8 for Figure 1 A three-dimensional schematic diagram of a hook body and a trigger pin of a trailer device connected together;

[0048] Fig. 9 for Figure 1 A schematic front view of the main shaft of the trailer device, without showing the end cover, hook body and fixing frame;

[0049] Fig.10 for Fig. 9 A schematic diagram of one side of the main shaft of the trailer device, without showing the end cover, hook body and fixing frame;

[0050] Fig.11 for Fig. 9 A schematic diagram of the other side of the main shaft of the trailer device, without showing the end cover, hook body and fixing frame;

[0051] Fig.12 for Fig. 9 A schematic cross-sectional view of the main shaft of the trailer device at the first limit post, without showing the fixing frame, and the sliding member is located in the first locking position;

[0052] Fig.13 for Fig. 9 A schematic cross-sectional view of the main shaft of the trailer device at the second limit post, without showing the fixing frame, and the sliding member is located in the first locking position;

[0053] Fig.14 for Fig. 9 A schematic cross-sectional view of the main shaft of the trailer device at the locking member, without showing the fixing frame, and the sliding member is located in the first locking position;

[0054] Fig.15 for Fig. 9 A schematic cross-sectional view of the main shaft of the trailer device at the first limit post, without showing the fixing frame, and the sliding member is in the unlocked position;

[0055] Fig.16 for Fig. 9 A schematic cross-sectional view of the main shaft of the trailer device at the second limit post, without showing the fixing frame, and the sliding member is in the unlocked position;

[0056] Fig.17 for Fig. 9 A schematic cross-sectional view of the main shaft of the trailer device at the locking member, without showing the fixing frame, and the sliding member is in the unlocked position;

[0057] Fig.18 for Fig. 9 A schematic cross-sectional view of the main shaft of the trailer device at the first limit post, without showing the fixing frame, and the sliding member is located in the second locking position;

[0058] Fig.19 for Fig. 9 A schematic cross-sectional view of the main shaft of the trailer device at the second limit post, without showing the fixing frame, and the sliding member is in the second locking position; and

[0059] Fig. 20 for Fig. 9 A schematic cross-sectional view of the main shaft of the trailer device at the locking member, without showing the fixing frame, and the sliding member is located in the second locking position.

[0060] Description of Reference Numerals

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

[0062] 112: First guiding helical surface 113: Second guiding helical 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: Spindle guide notch 130: Sliding part

[0067] 131: The first set of paragraphs 132: The second set of paragraphs

[0068] 133: The third set of sections 134: The first limiting groove

[0069] 135: second limiting groove 136: first inner side

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

[0071] 139: Sliding locking groove 141: First limiting column

[0072] 142: second limit column 143: first trigger pin

[0073] 144: first avoidance portion 145: second trigger pin

[0074] 146: second avoidance portion 147: first elastic member

[0075] 148: second elastic member 149: sliding limit pin

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

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

[0078] 154: Planetary gear shaft 160: Locking piece

[0079] 161: Motor output shaft 162: Screw

[0080] 163: Hook limit column 170: Fixed frame

[0081] 171: End cover 172: Planetary gear shaft fixing bracket

[0082] 173: Connecting plate 174: Sealing ring

[0083] 175: Wave washer 176: Friction plate

[0084] 177: Bushing 178: Drive shaft

[0085] 179: Coupling DETAILED DESCRIPTION

[0086] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present application. However, it is obvious to those skilled in the art that the present application embodiments can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present application embodiments, some technical features well known in the art are not described.

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

[0088] Herein, ordinal numbers such as “first” and “second” cited in this application are merely identifications and do not have any other meanings, such as a specific order or the like.

[0089] In order to thoroughly understand the implementation of the present application, a detailed structure will be presented in the following description. Obviously, the implementation of the implementation of the present application is not limited to the specific details familiar to those skilled in the art. The preferred implementation of the present application is described in detail below, but in addition to these detailed descriptions, the present application may also have other implementations.

[0090] The present application provides a trailer device. The trailer device can be used for a car. The car can be towed by the trailer device.

[0091] Please refer to Figures 1 to 20 The trailer device includes a fixing frame 170, a main shaft 120 and a fastener. The fixing frame 170 is used to be connected to the body of the automobile. The main shaft 120 is connected to the fixing frame 170 through the fastener. The main shaft 120 has a main shaft 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 be radially extended outward from the outer circumference of the spindle body 122. The spindle annular flange 123 is used to be connected to the fixing frame 170 by fasteners. Fig. 9 and Fig.13 As shown, the inner hole wall of the main shaft 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 device further includes a hook body 110. The hook body 110 has a hook body through hole. The hook body through hole is sleeved on the outer periphery of the main shaft body 122. In this way, the hook body 110 can be moved around the main shaft 120 at a first position (such as Figure 1 The hook body 110 is positioned as shown) and the second position (as shown) Figure 2When the hook body 110 is in the first position, the car can be towed by the hook body 110. When the hook body 110 is in the second position, the hook body 110 is in a stored state. At this time, the hook body 110 can be stored in the body of the car, thereby protecting the hook body 110.

[0094] like Fig.13 As shown, the inner hole 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 located at the first position and the second position, the hook body locking groove 111 is connected to the locking hole 121.

[0095] like Figure 4 , Figures 12 to 19 As shown, the trailer device also includes a sliding member 130. The sliding member 130 is a sleeve-shaped structure. The sliding member 130 is inserted into the main shaft through hole. The sliding member 130 is movable along the axial direction of the main shaft 120. In this way, the sliding member 130 can move between a locked position and an unlocked position along the axial direction of the main shaft 120. The outer peripheral surface of the sliding member 130 is radially recessed inward 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. Among them, the sliding locking groove 139 is a circumferentially closed annular structure. The limiting groove includes a first limiting groove 134.

[0096] Specifically, Fig.12 As shown, the sliding member 130 includes a first sleeve section 131, a second sleeve section 132 and a third sleeve section 133. Along the axial direction of the main shaft 120, the first sleeve section 131, the second sleeve section 132 and the third sleeve section 133 are arranged in sequence. The second sleeve section 132 is located between the first sleeve section 131 and the third sleeve section 133, and connects the first sleeve section 131 and the third sleeve section 133 respectively. The outer diameter of the second sleeve section 132 is smaller than the outer diameter of the first sleeve section 131 and the outer diameter of the third sleeve section 133. In this way, a sliding locking groove 139 is formed at the second sleeve section 132.

[0097] Please return Fig.13 The trailer device further includes a locking member 160. The locking member 160 may be a spherical structure. The locking member 160 is located in the locking hole 121.

[0098] Please refer to Fig.13 and Fig.19 , when the sliding member 130 is in the locking position and the hook body 110 is in the first position or the second position, the locking member 160 leaves 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 the locking hole 121. The locking member 160 can lock the hook body 110 to prevent the hook body 110 from rotating around the main shaft 120.

[0099] Specifically, Figure 12 to Figure 14 As shown, the locking position of the sliding member 130 includes a first locking position. When the sliding member 130 is located at the first locking position and the hook body 110 is located at the first position or the second position, the outer peripheral surface of the connection between the third sleeve section 133 and the second sleeve section 132 contacts the locking member 160 to support the locking member 160 in the connected locking hole 121 and the hook body locking groove 111.

[0100] like Figures 15 to 17 As shown, when the sliding member 130 is in the unlocking position, the sliding locking groove 139 is located at the locking hole 121, and the sliding locking groove 139 is connected to the locking hole 121. In this way, the locking member 160 can enter the sliding locking groove 139 and leave the hook body locking groove 111. At this time, the locking member 160 is located in the sliding locking groove 139 and the locking hole 121 to release the lock of the hook body 110. In this way, the hook body 110 can rotate around the main shaft 120.

[0101] like Figures 8 to 18 As shown, the trailer device also includes a limiting column. The limiting column includes a first limiting column 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 is connected to the main shaft through hole. The limiting through hole is located at the main shaft annular flange 123. The limiting through hole includes a first limiting through hole. The first limiting column 141 is movably arranged in the first limiting through hole along the axial direction of the first limiting through hole.

[0102] like Fig.12 As shown, when the sliding member 130 is located at the first locking position, the first limiting column 141 extends into the first limiting groove 134 .

[0103] Please note that, please refer to Fig.12 The sliding locking groove 139 is connected to the outer peripheral surface of the sliding member 130 through an arc surface or an inclined surface transition. The limiting groove is connected to the outer peripheral surface of the sliding member 130 through an arc surface or an inclined surface transition. Both ends of the limiting column are provided with rounded corners or chamfers.

[0104] Please continue to refer to Figures 8 to 20 The trailer device further includes a trigger pin. The main shaft 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 main shaft 120. The trigger mounting hole and the limit through hole correspond one to one. The trigger mounting hole is connected to the corresponding limit through hole. The trigger pin is movably arranged in the trigger mounting hole along the axial direction of the trigger mounting hole.

[0105] Please continue to refer to Figures 8 to 20, a guide helical surface is provided on one end surface of the hook body 110 along the axial direction of the main shaft 120. The helical axis of the guide helical surface is substantially coaxial with the axis of the main shaft 120. Fig.12 As shown, the guide helical surface includes a first guide helical 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 is connected to the first limit through hole. The first trigger pin 143 is movably arranged in the first trigger mounting hole along the axial direction of the first trigger mounting hole.

[0106] Please continue to refer to Fig.12 The first trigger pin 143 is located on a side of the first limiting column 141 away from the sliding member 130 . The first trigger pin 143 abuts against the first guiding helical surface 112 .

[0107] During the rotation of the hook body 110 around the main shaft 120 between the first position and the second position, the first trigger pin 143 always abuts against the first guide helical surface 112 , and the action of the first guide helical 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 relief portion. The relief portion can be configured as a radially inward depression of the outer circumference of the trigger pin. The relief portion can be configured as a circumferentially closed annular structure. The relief portion is connected to the outer circumference of the trigger pin through an arc surface or a bevel transition. The first trigger pin 143 has a first relief portion 144.

[0109] like Fig.12 As shown, when the hook body 110 is in the second position, the first avoidance portion 144 and the first limiting column 141 are staggered. The first trigger pin 143 blocks the first limiting column 141 from moving along the axial direction of the first limiting through hole, thereby preventing the first limiting column 141 from leaving the first limiting groove 134.

[0110] Please refer to Fig.12 and Fig.18 When the hook body 110 rotates from the second position to the first position, the first guide helical surface 112 pushes the first trigger pin 143, so that the first avoidance portion 144 moves to the first limiting column 141. At this time, the first avoidance portion 144 is connected to the first limiting through hole. The first limiting column 141 can move into the first avoidance portion 144, thereby leaving the first limiting groove 134.

[0111] Please return Fig.15, when the sliding member 130 is in the unlocked position, the first limiting post 141 extends into the first limiting groove 134, and the first limiting post 141 abuts against the first inner side surface 136. The first inner side surface 136 is located at one end of the first limiting groove 134 along the first moving direction D1. The first inner side surface 136 is located upstream of the first limiting post 141 along the first moving direction D1. In this way, the first inner side surface 136 can block the first limiting post 141, thereby preventing the sliding member 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 sliding member 130 is in the unlocked position, the hook body 110 can rotate around the main axis 120. At this time, the hook body 110 is rotated to the first position, so that the first limiting column 141 can move into the first avoidance portion 144 and then leave the first limiting groove 134. In this way, the locking of the sliding member 130 by the first limiting column 141 is released, so that the sliding member 130 can continue to move along the first moving direction D1.

[0113] like Figures 18 to 20 As shown, the locking position of the sliding member 130 also includes a second locking position. When the trailer device is not in use, the hook body 110 is located at the second position, and the sliding member 130 is located at the first locking position. At this time, when the sliding member 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 sliding member 130 is located at the second locking position, the first limiting column 141 is located outside the first limiting groove 134. The outer peripheral surface of the first sleeve section 131 contacts the first limiting column 141, so that the first limiting column 141 extends into the first avoidance portion 144. When the sliding member 130 is located at the second locking position, the locking member 160 contacts the outer peripheral surface of the connection between the first sleeve section 131 and the second sleeve section 132, and then supports the locking member 160 on the connected locking hole 121 and the hook body locking groove 111 to lock the hook body 110 and prevent the hook body 110 from rotating.

[0114] When the trailer is not in use, Figure 2 , Figure 12 to Figure 14 As shown in FIG. 1 , the hook body 110 is located at the second position, and the sliding member 130 is located at the first locking position. If the trailer device is required, the sliding member 130 can be moved along the first moving direction D1 to the unlocking position. Figures 15 to 17 As shown, the locking member 160 moves into the sliding locking groove 139, and the first limiting column 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 column 141 blocks 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 helical surface 112 acts on the first trigger pin 143, causing the first trigger pin 143 to move, so that the first avoidance portion 144 moves to the first limiting column 141, thereby releasing the first trigger pin 143 from blocking the first limiting column 141, and allowing the first limiting column 141 to extend into the first avoidance portion 144. In this way, the first limiting column 141 no longer blocks the sliding member 130 from continuing to move along the first moving direction D1. At this time, the sliding member 130 continues to move along the first moving direction D1. During this process, the sliding member 130 acts on the first limiting column 141, causing the first limiting column 141 to move away from the first limiting groove 134, contact the outer peripheral surface of the first sleeve section 131, and extend into the second avoidance portion 146. At the same time, the locking member 160 leaves the sliding locking groove 139 to contact the outer peripheral surface of the connection between the first sleeve section 131 and the second sleeve section 132, and then the locking member 160 is supported on the connected locking hole 121 and the hook body locking groove 111 to lock the hook body 110 in the first position to prevent the hook body 110 from rotating.

[0116] In this embodiment, the first trigger pin 143 abuts against the first guide spiral surface 112, so that the first trigger pin 143 blocks the first limiting column 141 from moving away from the first limiting groove 134. In this way, the first trigger pin 143 has a small force on the hook body 110, and the torque driving the hook body 110 to rotate is small.

[0117] Alternatively, if Figure 4 , Figure 8 , Figures 12 to 19 As shown, the guiding helical surface further includes a second guiding helical surface 113. The second guiding helical surface 113 is located on the side of the first guiding helical surface 112. The limiting groove further includes a second limiting groove 135. The second limiting groove 135 and the first limiting groove 134 are circumferentially spaced apart around the axis of the main shaft 120.

[0118] like Fig.13 As shown, the limiting column further includes a second limiting column 142. The second limiting column 142 and the first limiting column 141 are circumferentially spaced apart around the axis of the main shaft 120. The limiting through hole includes a second limiting through hole. The second limiting column 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 Fig.13The trigger pin includes a second trigger pin 145. The second trigger pin 145 and the first trigger pin 143 are circumferentially spaced apart around the axis of the main shaft 120. The trigger mounting hole includes a second trigger mounting hole. The second trigger mounting hole is connected to the second limit through hole. The second trigger pin 145 is movably arranged in the second trigger mounting hole along the axial direction of the second trigger mounting hole. The second trigger pin 145 has a second avoidance portion 146. The second trigger pin 145 abuts against the second guide helical surface 113.

[0120] like Fig.13 As shown, when the sliding member 130 is located at the first locking position, the second limiting column 142 contacts the outer peripheral surface of the connection between the first sleeve section 131 and the second sleeve section 132 .

[0121] like Fig.16 As shown, when the sliding member 130 is in the unlocked position, the second limiting post 142 extends into the second limiting groove 135, and the second limiting post 142 abuts against the second inner side surface 137. The second inner side surface 137 is located at one end of the second limiting groove 135 along the second moving direction D2. The second inner side surface 137 is located upstream of the second limiting post 142 along the second moving direction D2. In this way, the second inner side surface 137 can block the second limiting post 142, thereby preventing the sliding member 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 Fig.19 As shown, when the sliding member 130 is located at the second locking position, the second limiting column 142 extends into the second limiting groove 135 .

[0123] like Fig.18 and Fig.19 As shown in FIG. 1 , when the trailer device is in use, the hook body 110 is located at the first position and the sliding member 130 is located at the second locking position. If the trailer device needs to be folded, the sliding member 130 can be moved along the second moving direction D2 to the unlocking position. Fig.16 As shown, the locking member 160 moves to the sliding locking groove 139, and the second limiting column 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 column 142 blocks the sliding member 130 from continuing to move along the second moving direction D2.

[0124] Please refer to Fig.16 and Fig.13 At this time, the second trigger pin 145 is moved by the second guide helical surface 113, so that the second trigger pin 145 moves, and the second avoidance portion 146 moves to the second limit column 142, so as to release the blocking of the second trigger pin 145 on the second limit column 142, so that the second limit column 142 can extend into the second avoidance portion 146.

[0125] In this way, the second limiting column 142 no longer blocks 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. In this process, the sliding member 130 acts on the second limiting column 142, so that the second limiting column 142 moves away from the second limiting groove 135, contacts the outer peripheral surface of the connection between the first sleeve section 131 and the second sleeve section 132, and extends into the second avoidance portion 146. At the same time, the locking member 160 leaves the sliding locking groove 139 to contact the outer peripheral surface of the connection between the second sleeve section 132 and the third sleeve section 133, and then supports the locking member 160 on the connected locking hole 121 and the hook body locking groove 111, so as to lock the hook body 110 located in the second position to prevent the hook body 110 from rotating. Therefore, as the second trigger pin 145 abuts against the second guide helical surface 113 , the force exerted by the second trigger pin 145 on the hook body 110 is small, and the torque driving the hook body 110 to rotate is even smaller.

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

[0127] Alternatively, if Figures 8 to 19 As shown, the trailer device also includes an elastic member. The elastic member includes a first elastic member 147 and a second elastic member 148. The first elastic member 147 is connected to the first trigger pin 143 and the fixing bracket 170 to apply a force to the first trigger pin 143 so that the first trigger pin 143 abuts against the first guide spiral surface 112. The second elastic member 148 is connected to the first trigger pin 143 and the fixing bracket 170 to apply a force to the second trigger pin 145 so that the second trigger pin 145 abuts against the second guide spiral surface 113. As a result, it is convenient to make the trigger pin abut against the guide spiral surface. In addition, the elastic force of the elastic member is small, which can reduce the pressure of the trigger pin on the hook body 110.

[0128] like Figure 8 , Fig. 9 and Fig.16 As shown, the end surface 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] Alternatively, if Figure 8 and Fig.12 As shown, the end of the first limiting groove 134 along the first moving direction D1 is an opening, which is connected to the sliding locking groove 139. Thus, the processing of the first limiting groove 134 is convenient.

[0130] Alternatively, if Fig.13 As shown, the end of the second limiting groove 135 along the second moving direction D2 is open. In other words, the second limiting groove 135 passes through the first sleeve section 131 along the second moving direction D2. Therefore, the processing of the second limiting groove 135 is convenient.

[0131] like Fig.11 As shown, the end surface of the sliding member 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 sliding member 130 is inserted into 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 Fig.11 As shown, the trailer device further includes a sliding stop pin 149. The sliding stop pin 149 is disposed in the sliding guide notch 138 and the spindle guide notch 124. In this way, the sliding stop pin 149 can prevent the sliding member 130 from rotating around the axis of the spindle 120. The sliding stop pin 149 can guide the movement of the sliding member 130 along the axial direction of the spindle 120, so that the movement of the sliding member 130 is more stable. In addition, the provision of the sliding guide notch 138 and the spindle guide notch 124 facilitates the installation of the sliding stop pin 149.

[0133] Please return Figure 3 The trailer device further includes a motor output shaft 161, a drive shaft 178, a screw 162, a planetary gear assembly 150, an end cover 171, a planetary gear shaft fixing frame 172, a connecting plate 173, a sleeve 177 and a coupling 179. The planetary gear assembly 150 includes an inner ring gear 153, a sun gear 151, a planetary gear 152 and a planetary gear shaft 154.

[0134] like Figures 1 to 3 As shown, the motor output shaft 161 is rotatably disposed in the fixing frame 170. The motor output shaft 161 is used to connect to a driving member, for example, to a driving motor of a car, or the motor output shaft 161 is an output shaft of the driving motor.

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

[0136] like Fig.12As shown, the sliding member 130 has a threaded through hole. The screw rod 162 is threadedly connected to the threaded through hole of the sliding member 130. The screw rod 162 is inserted into the main shaft 120 through a sleeve 177. One end of the screw rod 162 extends outside the main shaft 120 and extends into the planetary gear cavity. The connecting plate 173 is located in the planetary gear cavity and is connected to (e.g., connected to) the screw rod 162 through a spline. In this way, the screw rod 162 and the connecting plate 173 rotate together.

[0137] like Figure 4 and Figure 7 As shown, the planetary gear assembly 150 and the planetary gear shaft fixing frame 172 are both located in the planetary gear cavity. The inner gear ring 153 is connected to the connecting plate 173 to rotate together with the connecting plate 173.

[0138] like Figure 3 , Figures 9 to 12 As shown, the drive shaft 178 is passed through the screw 162 and extends into the planetary gear cavity. The drive shaft 178 is connected to the sun gear 151 to rotate together with the sun gear 151. The planetary gear 152 is rotatably arranged on the planetary gear shaft fixing frame 172 through the planetary gear shaft 154. The planetary gear shaft fixing frame 172 is fixedly connected to the end cover 171. In this way, the planetary gear shaft fixing frame 172 and the end cover 171 rotate together. The planetary gear 152 is meshed with the sun gear 151 and the inner ring gear 153.

[0139] like Figure 3 and Fig. 9 As shown, the motor output shaft 161 is connected to the drive shaft 178 through the coupling 179. In this way, the motor output shaft 161 can drive the drive shaft 178 to rotate, thereby driving the planetary gear assembly to operate. When the hook body 110 is locked and cannot rotate, and any one of the first limiting column 141 and the second limiting column 142 does not block the sliding member 130 from moving along the axial direction of the main shaft 120, the inner gear ring 153 drives the screw rod 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 column 141 blocks the sliding member 130 from moving along the first moving direction D1, or the hook body 110 can rotate and the second limiting column 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 device is not in use, the hook body 110 is located at the second position, and the sliding member 130 is located at the first locking position to lock the hook body 110. If the trailer device needs to be used, the motor output shaft 161 can be rotated around the first rotation direction, thereby sequentially performing the actions of unlocking the hook body 110, driving the hook body 110 to rotate from the second position to the first position, and locking the hook body 110 at the first position.

[0142] When the trailer device is in use, the hook body 110 is located at the first position, and the sliding member 130 is located at the second locking position to lock the hook body 110. If the trailer device needs to be folded, the motor output shaft 161 can be rotated in a direction opposite to the first rotation direction, thereby sequentially performing the actions of unlocking the hook body 110, driving the hook body 110 to rotate from the first position to the second position, and locking the hook body 110 at the second position.

[0143] Optionally, refer to Figure 3 , Figure 7 and Fig. 9 The trailer device further includes a hook body limiting column 163, a sealing ring 174, a wave washer 175 and a friction plate 176. The axial direction of the hook body limiting column 163 is parallel to the axial direction of the main shaft 120. The hook body limiting column 163 is penetrated through the main shaft annular flange 123 and extends to the side of the main shaft annular flange 123 close to the hook body 110. The hook body limiting column 163 blocks the hook body 110 located at the first position from rotating away from the second position. It can be understood that the vehicle body or the main shaft 120 is provided with a structure for blocking the hook body located at the second position from rotating away from the first position.

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

[0145] The present application also provides a car, which includes the aforementioned trailer device.

[0146] In this embodiment, the automobile includes the aforementioned trailer device, and the first trigger pin 143 abuts against the first guide spiral surface 112. In this way, the first trigger pin 143 blocks the first limiting column 141 from moving away from the first limiting groove 134. In this way, the first trigger pin 143 has a small force on the hook body 110, and the torque driving the hook body 110 to rotate is small.

[0147] The present application has been described through the above-mentioned embodiments, but it should be understood that the above-mentioned embodiments are only for the purpose of example and illustration, and are not intended to limit the present application to the scope of the described embodiments. In addition, it can be understood by those skilled in the art that the present application is not limited to the above-mentioned embodiments, and more variations and modifications can be made according to the teachings of the present application, and these variations and modifications all fall within the scope of protection claimed by the present application. The scope of protection of the present application is defined by the attached claims and their equivalents.

[0148] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art in the technical field of this application. The terms used herein are only for describing specific implementation purposes and are not intended to limit this application. Terms such as "component" and the like appearing in this article may represent either a single part or a combination of multiple parts. Terms such as "installation" and "setting" and the like appearing in this article may represent either a component being directly attached to another component or a component being attached to another component through an intermediate. Features described herein in one embodiment may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable in the other embodiment or otherwise specified.

Claims

1. A trailer device, characterized in that: The trailer device comprises: Spindle; A hook body, the hook body being rotatably sleeved on the main shaft between a first position and a second position, and a first guiding helical surface being provided on an end surface of the hook body along the axial direction of the main shaft; A sliding member, the sliding member is movably arranged on the main shaft along the axial direction of the main shaft, and a first limiting groove is arranged on the outer peripheral surface of the sliding member; A first limiting post, wherein the first limiting post is movably disposed on the main shaft along a radial direction of the main shaft; A first trigger pin, the first trigger pin is movably disposed on the main shaft along the axial direction of the main shaft, the first trigger pin has a first avoidance portion, and the first trigger pin abuts against the first guide helical surface; During the process of the hook body rotating from the second position to the first position, the first guide spiral surface pushes the first trigger pin to make the first avoidance portion move to the first limit column, so that the first limit column can move into the first avoidance portion, thereby releasing the locking of the sliding member by the first limit column extending into the first limit groove and abutting 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 limit groove located upstream of the first limit column along the first moving direction, and the first moving direction is parallel to the axial direction of the main shaft.

2. The trailer device according to claim 1, characterized in that: The end surface of the hook body is provided with a second guiding helical surface located on the side of the first guiding helical surface. The outer circumferential surface of the sliding member is provided with a second limiting groove which is circumferentially spaced from the first limiting groove. A second limiting column, wherein the second limiting column is movably disposed on the main shaft along the radial direction of the main shaft; a second trigger pin, the second trigger pin being movably disposed on the main shaft along the axial direction of the main shaft, the second trigger pin having a second avoidance portion, and the second trigger pin abutting against the second guide helical surface; During the process of the hook body rotating from the first position to the second position, the second guide spiral surface pushes the second trigger pin to make the second avoidance portion move to the second limit column, so that the second limit column can move into the second avoidance portion, thereby releasing the locking of the sliding member by the second limit column extending into the second limit groove and abutting against the second inner side surface, so that the sliding member can continue to move along the second moving direction. The second inner side surface is the second limit groove located upstream of the second limit column along the second moving direction, and the first moving direction and the second moving direction are opposite.

3. The trailer device according to claim 2, characterized in that: The trailer device also includes an elastic member connected to the first trigger pin and the second trigger pin to apply a force to the first trigger pin so that the first trigger pin abuts against the first guide helical surface, and to apply a force to the second trigger pin so that the second trigger pin abuts against the second guide helical surface.

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

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

6. The trailer device according to claim 1, characterized in that: An end of the first limiting groove along the first moving direction is an opening.

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

8. The trailer device according to claim 1, characterized in that: One end surface of the sliding member along the axial direction of the main shaft 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 device also includes a sliding limit pin, which is arranged in the sliding guide notch and the main shaft guide notch.

9. The trailer device according to claim 1, characterized in that: The trailer device also includes: A screw rod, the screw rod being threadedly connected to the sliding member; An inner gear ring connected to the lead screw; Sun gear; a planetary wheel rotatably disposed on the hook body; The inner gear ring and the sun gear are both meshed with the planetary gears.

10. The trailer device according to claim 1, characterized in that: The main shaft has a locking hole, the inner circumference of the hook body has a hook body locking groove, and the outer circumference 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 device further includes a locking member, wherein the locking member is located in the locking hole; The sliding member is movable between an unlocking position and a locking position along the axial direction of the main shaft. When the sliding member is located at the unlocking position, the locking member enters the sliding locking groove and leaves the hook body locking groove. The first limiting column is located in the first limiting groove and abuts against a first outer side surface of the first limiting groove. When the hook body is at the first position or the second position and the sliding member is at the locking position, the locking member leaves the sliding locking groove and enters the hook body locking groove, and the sliding member can move along the first moving direction.

11. A car, characterized in that: The automobile comprises: A trailer arrangement according to any one of claims 1 to 10.

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