CN118219725A - Trailer hook assembly and vehicle - Google Patents

Abstract

The invention discloses a trailer hook assembly and a vehicle. The trailer hook assembly comprises a base shell, a hook body, a transmission assembly and a driving piece, wherein the hook body is rotatably arranged on the base shell and has an unfolding state and a storage state; the transmission component is respectively in linkage with the base shell and the hook body, and locks the hook body and the base shell in the unfolding state and/or the storage state; the driving piece is suitable for driving the transmission component to drive the hook body to rotate relative to the base shell so as to switch between the unfolding state and the storage state. According to the trailer hook assembly, the driving piece drives the transmission assembly to drive the hook body and the base shell to rotate relatively to realize the switching of the hook body between the storage state and the unfolding state, in the process, the transmission assembly can lock or unlock the hook body and the base shell in the storage state and the unfolding state, so that the stability of the hook body in the use process is ensured, and the trailer hook assembly is simple in structure, convenient to operate and high in practicability.

Description

Trailer hook assembly and vehicle

Technical Field

The present invention relates to the field of vehicles, and in particular to a trailer hook assembly and a vehicle.

Background technique

A trailer hook is installed on the car, fixed on the rear anti-collision beam of the car through a mounting bracket, and the trailer hook is electrically opened and closed by a motor, so as to realize the function of the trailer hook and improve the vehicle's mounting capacity. However, the current trailer hook has a complex structure and a cumbersome process of switching the opening and closing states, which is not conducive to the use of the trailer hook.

Summary of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a trailer hook assembly. According to the trailer hook assembly of the present invention, a driving member drives a transmission assembly to drive the hook body and a base shell to rotate relative to each other to realize the switching of the hook body between a storage state and an unfolded state. During this process, the transmission assembly itself can lock or unlock the hook body and the base shell in the storage state and the unfolded state, thereby ensuring the stability of the hook body during use. The structure is simple, the operation is convenient, and the practicability is strong.

The present invention also provides a vehicle comprising the trailer hook assembly.

According to the present invention, the trailer hook assembly includes a base shell, a hook body, a transmission assembly and a driving member. The hook body is rotatably arranged on the base shell and has an expanded state and a stored state; the transmission assembly is respectively linked with the base shell and the hook body, and the transmission assembly locks the hook body and the base shell in the expanded state and/or the stored state; the driving member is suitable for driving the transmission assembly to drive the hook body to rotate relative to the base shell to switch between the expanded state and the stored state.

According to the present invention, the trailer hook assembly is provided with a base shell, on which a hook body is rotatably provided, the hook body is the main structure of the trailer hook, and the hook body has an unfolded state and a stored state, the unfolded state is the state when the trailer hook is in use, and the stored state is the state when the trailer hook is normally stored. A transmission assembly is provided between the base shell and the hook body, and the transmission assembly can link the hook body with the base shell so as to control the relationship between the base shell and the hook body. In addition, the trailer hook assembly is also provided with a driving member, and the driving member can provide power to the transmission assembly so as to drive the transmission assembly to drive the hook body to rotate relative to the base shell to realize the opening and closing of the trailer hook assembly.

According to one embodiment of the present invention, the driving member is suitable for driving the transmission assembly to unlock the hook body from the base shell in the stored state and/or driving the transmission assembly to unlock the hook body from the base shell in the deployed state.

According to one embodiment of the present invention, the base shell is provided with a accommodating cavity, and the hook body is sleeved on the outer periphery of the base shell; the transmission assembly includes: a locking member, at least a portion of the locking member is accommodated in the accommodating cavity, the locking member is linked with the driving member and under the drive of the driving member, the outer surface of the protruding base shell cooperates with the hook body to lock the hook body with the base shell.

According to one embodiment of the present invention, the transmission assembly also includes a first driving gear, a planetary gear, a second driving gear, a transmission rod and a slider, the first driving gear is connected to the driving member; the planetary gear is rotatably arranged on the hook body and meshes with the first driving gear; the second driving gear is meshed with the planetary gear; the transmission rod is connected to the second driving gear; the slider is limitedly matched with the base shell so as to be translationally arranged in the accommodating cavity, and the slider is suitable for driving the locking member under the drive of the transmission rod.

According to one embodiment of the present invention, the locking member includes a first locking portion and a second locking portion; a first guide slope cooperating with the first locking portion and a second guide slope cooperating with the second locking portion are formed on the slider; wherein, in the stored state, the slider is arranged at one end of the transmission rod, and the first guide slope is inclined away from the inner wall of the accommodating cavity in the direction toward the other end of the transmission rod; in the deployed state, the slider is arranged at the other end of the transmission rod, and the second guide slope is inclined away from the inner wall of the accommodating cavity in the direction toward one end of the transmission rod.

According to an embodiment of the present invention, the first locking portion and the second locking portion are arranged at intervals in the circumferential direction of the base shell.

According to one embodiment of the present invention, a first through hole and a second through hole spaced apart in the circumferential direction are formed on the base shell, the first through hole is suitable for the first locking portion to pass through, the second through hole is suitable for the second locking portion to pass through, and the angle between the center of the first through hole, the center of the second through hole and the center of the base shell is α and satisfies: 180°≤α≤200°.

According to an embodiment of the present invention, the width of the second locking portion is greater than the width of the first locking portion.

According to an embodiment of the present invention, the driving member is configured as a driving shaft, the first driving gear is disposed at an end of the driving shaft, and the first driving gear and the second driving gear are respectively coaxially disposed with the driving shaft.

According to an embodiment of the present invention, the transmission rod is loosely sleeved on the outer circumference of the driving shaft and the end of the transmission rod is connected to the second driving gear.

According to an embodiment of the present invention, the sliding block is loosely sleeved on the outer periphery of the transmission rod and is threadably matched with the transmission rod.

According to one embodiment of the present invention, the inner wall of the accommodating cavity is formed with a first rotation limit portion parallel to the transmission rod, and the sliding block is provided with a second rotation limit portion cooperating with the first rotation limit portion, and the first rotation limit portion and the second rotation limit portion are abutted in the circumferential direction and are movable in the axial direction.

According to one embodiment of the present invention, the hook body includes a hook body shell and a planetary carrier, and an installation cavity is formed in the hook body shell, and at least a portion of the base shell is accommodated in the installation cavity; the planetary carrier is arranged in the installation cavity and cooperates with the hook body shell in a circumferential upper limit position, and at least one planetary gear is rotatably arranged on the planetary carrier, and the rotation axes of the multiple planetary gears are orthogonal to the axis of the first driving gear.

According to one embodiment of the present invention, a first locking member is provided on the side of the hook body shell facing the installation cavity, and a second locking member is provided on the outer surface of the base shell, and the first locking member and the second locking member are suitable for cooperating when the hook body shell is rotated to a stored state and/or an unfolded state to limit the rotation of the base shell and the hook body shell.

The vehicle according to the present invention will be briefly described below.

The vehicle according to the present invention includes the trailer hook assembly in the above-mentioned embodiment. Since the vehicle according to the present invention is provided with the trailer hook assembly in the above-mentioned embodiment, the trailer hook assembly can switch between the storage state and the deployment state by driving the transmission assembly through the driving member to drive the hook body to rotate. The overall process is simple and convenient. While improving the vehicle's mounting capacity, it reduces the difficulty of use and improves the user experience of the vehicle.

Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and/or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

FIG. 1 is an exploded view of a trailer hook assembly according to one embodiment of the present invention;

FIG2 is a structural diagram of a trailer hook assembly in a stowed state according to an embodiment of the present invention;

3 is a structural diagram of a trailer hook assembly in an expanded state according to an embodiment of the present invention;

4 is a cross-sectional view of a trailer hook assembly according to one embodiment of the present invention;

5 is a cross-sectional view of a trailer hook assembly according to one embodiment of the present invention;

6 is a cross-sectional view of a trailer hook assembly according to one embodiment of the present invention;

7 is a cross-sectional view of a trailer hook assembly according to one embodiment of the present invention;

8 is a cross-sectional view of a trailer hook assembly according to one embodiment of the present invention;

FIG. 9 is a structural diagram of a transmission assembly according to an embodiment of the present invention.

Reference numerals:

Trailer hook assembly 1;

Base shell 11, first through hole 111, second through hole 112, third through hole 113, second rotation limiting portion 114;

Hook body 12, hook body housing 121, planet carrier 122;

Transmission assembly 13, locking member 131, first locking portion 1311, second locking portion 1312, first driving gear 132, planetary gear 133, second driving gear 134, transmission rod 135, slider 136, first guiding inclined surface 1361, second guiding inclined surface 1362, first rotation limiting portion 1363;

Driving shaft 14 , steel ball 101 , groove 102 .

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

A trailer hook is installed on the car, fixed on the rear anti-collision beam of the car through a mounting bracket, and the trailer hook is electrically opened and closed by a motor, so as to realize the function of the trailer hook and improve the vehicle's mounting capacity. However, the current trailer hook has a complex structure and a cumbersome process of switching the opening and closing states, which is not conducive to the use of the trailer hook.

The trailer hook assembly according to an embodiment of the present invention will be described below with reference to FIGS. 1 to 9 .

The trailer hook assembly 1 according to the present invention comprises a base shell 11, a hook body 12, a transmission assembly 13 and a driving member. The hook body 12 is rotatably arranged on the base shell 11 and has an extended state and a retracted state. The transmission assembly 13 is respectively linked with the base shell 11 and the hook body 12, and the transmission assembly 13 locks the hook body 12 and the base shell 11 in the extended state and/or the retracted state. The driving member is suitable for driving the transmission assembly 13 to drive the hook body 12 to rotate relative to the base shell 11 to switch between the extended state and the retracted state.

According to the present invention, the trailer hook assembly 1 is provided with a base shell 11, on which a hook body 12 is rotatably provided. The hook body 12 is the main structure of the trailer hook, and the hook body 12 has an unfolded state and a stored state. The unfolded state is the state when the trailer hook is in use, and the stored state is the state when the trailer hook is normally stored. A transmission assembly 13 is provided between the base shell 11 and the hook body 12, and the transmission assembly 13 can link the hook body 12 with the base shell 11 so as to control the relationship between the base shell 11 and the hook body 12. In addition, the trailer hook assembly 1 is also provided with a driving member, which can provide power to the transmission assembly 13, so as to drive the transmission assembly 13 to drive the hook body 12 to rotate relative to the base shell 11, thereby realizing the opening and closing of the trailer hook assembly 1.

Specifically, when the trailer hook needs to be used, the driving member works and transmits the driving force to the transmission assembly 13. The transmission assembly 13 controls the relative movement of the hook body 12 and the base shell 11 through mechanical transmission. After the hook body 12 rotates a certain angle relative to the base shell 11, it can reach the preset position. At this time, the hook body 12 completes the process of converting from the storage state to the unfolded state. After the hook body 12 rotates to the preset position, the transmission assembly 13 can also lock the hook body 12 with the base shell 11 to ensure the relative stability between the hook body 12 and the base shell 11, thereby improving the stability of the trailer hook assembly 1 when in use. After the trailer hook is used, the driving member works again and transmits the driving force to the transmission assembly 13. The transmission assembly 13 controls the relative movement of the hook body 12 and the base shell 11 through mechanical transmission. After the hook body 12 rotates a certain angle relative to the base shell 11, it can return to the initial position. At this time, the hook body 12 completes the process of converting from the unfolded state to the storage state. After the hook body 12 rotates to the initial position, the transmission assembly 13 can also lock the hook body 12 with the base shell 11 to ensure the stability of the hook body 12 in the storage state. The trailer hook assembly 1 provides a driving force by setting a driving member, and the transmission assembly 13 is set to control the rotation of the hook body 12 relative to the base shell 11 to realize the opening and closing of the trailer hook assembly 1. The process is simple and convenient, which reduces the difficulty of using the trailer hook assembly 1; the transmission assembly 13 itself can also lock the hook body 12 after the hook body 12 and the base shell 11 rotate relative to each other, which improves the stability of the trailer hook assembly 1; at the same time, the transmission assembly 13 integrates the rotation and locking functions of the hook body 12 into one structure, which reduces the process complexity of the trailer assembly.

It is worth noting that the initial position can be understood as the position of the hook body 12 in the stored state, and the preset position can be understood as the position of the hook body 12 in the unfolded state.

According to one embodiment of the present invention, the driving member is suitable for driving the transmission assembly 13 to unlock the hook body 12 and the base shell 11 in the storage state and/or driving the transmission assembly 13 to unlock the hook body 12 and the base shell 11 in the unfolded state. Specifically, in the storage state, the driving member works to provide driving force for the transmission assembly 13, and the transmission assembly 13 controls the hook body 12 and the base shell 11 to unlock. After unlocking, the hook body 12 and the base shell 11 move relative to each other to complete the conversion of the hook body 12 from the storage state to the unfolded state. Similarly, in the unfolded state, the driving member works to provide driving force for the transmission assembly 13, and the transmission assembly 13 controls the hook body 12 and the base shell 11 to unlock. After unlocking, the hook body 12 and the base shell 11 move relative to each other to complete the conversion of the hook body 12 from the unfolded state to the storage state. Therefore, the use process of the trailer hook assembly 1 can be roughly understood as: the hook body 12 and the base shell 11 are first unlocked, then the hook body 12 and the base shell 11 rotate relative to each other, and finally the hook body 12 and the base shell 11 are locked again. The driving of the driving member can improve the efficiency of unlocking, rotating and locking the hook body 12 and the base shell 11 , thereby reducing the difficulty of using the trailer hook assembly 1 .

According to one embodiment of the present invention, the base shell 11 is provided with a receiving cavity, and the hook body 12 is sleeved on the outer periphery of the base shell 11; the transmission assembly 13 includes a locking member 131, at least part of which is accommodated in the receiving cavity, and the locking member 131 is linked with the driving member and protrudes from the outer surface of the base shell 11 under the driving of the driving member to cooperate with the hook body 12 to lock the hook body 12 with the base shell 11. Since the transmission assembly 13 itself can realize the locking function of the hook body 12 and the base shell 11, the structure of the transmission assembly 13 will affect the stability of the cooperation between the hook body 12 and the base shell 11. Specifically, the base shell 11 is provided with a receiving cavity, and the hook body 12 can be sleeved on the outer periphery of the base shell 11, so that the hook body 12 and the base shell 11 can rotate relative to each other. The transmission assembly 13 is provided with a locking member 131, at least part of which is arranged in the accommodating cavity. When the hook body 12 and the base shell 11 need to be locked, the transmission assembly 13 drives the locking member 131 to move. At this time, the free end of the locking member 131 protrudes from the outer surface of the base shell 11 and can stop against the hook body 12, thereby achieving the locking of the hook body 12 and the base shell 11. The locking member 131 is arranged on the transmission assembly 13 so that the transmission assembly 13 itself has the ability to lock the hook body 12 and the base shell 11, and there is no need to arrange a locking structure at other positions, thereby improving the compactness of the overall structure of the trailer hook assembly 1.

According to an embodiment of the present invention, the transmission assembly 13 further includes a first driving gear 132, a planetary gear 133, a second driving gear 134, a transmission rod 135 and a slider 136, wherein the first driving gear 132 is connected to the driving member; the planetary gear 133 is rotatably disposed on the hook body 12 and meshes with the first driving gear 132; the second driving gear 134 meshes with the planetary gear 133; the transmission rod 135 is connected to the second driving gear 134; the slider 136 is limitedly matched with the base shell 11 to be translationally disposed in the accommodating cavity, and the slider 136 is suitable for driving the locking member 131 under the drive of the transmission rod 135. Since the transmission assembly 13 is a structure in the trailer hook assembly 1 that controls the hook body 12 to switch between the deployed state and the stored state, the structure of the transmission assembly 13 will affect the use of the trailer hook assembly 1.

The transmission assembly 13 includes a first driving gear 132, a planetary gear 133, a second driving gear 134, a transmission rod 135 and a slider 136, wherein the first driving gear 132, the planetary gear 133, the second driving gear 134 and the transmission rod 135 are structures for transmitting driving force, and the slider 136 is a structure for driving the locking member 131 to unlock or lock. Specifically, the first driving gear 132 is connected to the driving member, and the driving member can drive the first driving gear 132 to rotate when it works; the planetary gear 133 is rotatably arranged on the hook body 12 and meshes with the first driving gear 132. After the first driving gear 132 is driven by the driving member, it can drive the planetary gear 133 to rotate; the second driving gear 134 is meshed with the planetary gear 133, and the rotation of the planetary gear 133 can transmit the torque to the second driving gear 134; the transmission rod 135 is connected to the second driving gear 134. When the second driving gear 134 rotates, since the second driving gear 134 is connected to the transmission rod 135, the transmission rod 135 can rotate synchronously with the second driving gear 134. At this point, the driving force provided by the driving member is transmitted to the transmission rod 135. After the transmission rod 135 rotates, it will drive the slider 136 to move so as to drive the locking member 131 to realize the locking or unlocking function. It is worth noting that the slider 136 and the base shell 11 are limited in fit, and the limited fit here prevents the slider 136 from radially moving relative to the transmission rod 135, that is, the slider 136 can translate in the accommodating cavity, thereby improving the stability of the slider 136 when driving the locking member 131.

According to one embodiment of the present invention, the locking member 131 includes a first locking portion 1311 and a second locking portion 1312; a first guide slope 1361 cooperating with the first locking portion 1311 and a second guide slope 1362 cooperating with the second locking portion 1312 are formed on the slider 136; wherein, in the stored state, the slider 136 is arranged at one end of the transmission rod 135, and the first guide slope 1361 is inclined away from the inner wall of the accommodating cavity in the direction toward the other end of the transmission rod 135; in the unfolded state, the slider 136 is arranged at the other end of the transmission rod 135, and the second guide slope 1362 is inclined away from the inner wall of the accommodating cavity in the direction toward one end of the transmission rod 135.

Since the locking member 131 is a structure for locking the hook body 12 and the base shell 11, the structure of the locking member 131 will affect the stability of the trailer hook assembly 1. The locking member 131 is provided with a first locking portion 1311 and a second locking portion 1312, and a first guiding inclined surface 1361 and a second guiding inclined surface 1362 are formed on the slider 136, wherein the first guiding inclined surface 1361 can cooperate with the first locking portion 1311 and drive the first locking portion 1311 to move; the second guiding inclined surface 1362 can cooperate with the second locking portion 1312 and drive the second locking portion 1312 to move. The first guiding inclined surface 1361 is inclined away from the inner wall of the accommodating cavity in the direction toward the other end of the transmission rod 135; the second guiding inclined surface 1362 is inclined away from the inner wall of the accommodating cavity in the direction toward one end of the transmission rod 135.

In the retracted state, the slider 136 is located at one end of the transmission rod 135, and the top of the first guide slope 1361 supports the first locking portion 1311 to lock the hook body 12 with the base shell 11. When the driving member works to provide driving force, the slider 136 starts to move toward the other end of the transmission rod 135. At this time, the top of the first guide slope 1361 no longer supports the first locking portion 1311 and moves in a direction away from the first locking portion 1311. The first locking portion 1311 moves along the first guide slope 1361 and disengages from the hook body 12, thereby unlocking the first locking portion 1311. The root of the second guide slope 1362 starts to support the second locking portion 1312. The second locking portion 1312 moves along the second guide slope 1362 and gradually approaches the hook body 12 until it stops with the hook body 12 to complete the locking of the second locking portion 1312. At this time, the hook body 12 is converted into the unfolded state.

In the unfolded state, the slider 136 is located at the other end of the transmission rod 135, and the top of the second guide slope 1362 supports the second locking portion 1312 to lock the hook body 12 with the base shell 11. When the driving member works to provide driving force, the slider 136 begins to move toward one end of the transmission rod 135. At this time, the top of the second guide slope 1362 no longer supports the second locking portion 1312 and moves in a direction away from the second locking portion 1312. The second locking portion 1312 moves along the second guide slope 1362 and disengages from the hook body 12, thereby unlocking the second locking portion 1312. The root of the first guide slope 1361 begins to support the first locking portion 1311. The first locking portion 1311 moves along the first guide slope 1361 and gradually approaches the hook body 12 until it stops with the hook body 12 to complete the locking of the first locking portion 1311. At this time, the hook body 12 is converted into the storage state.

According to one embodiment of the present invention, the first locking portion 1311 and the second locking portion 1312 are spaced apart in the circumferential direction of the base shell 11. In order to avoid interference between the first locking portion 1311 and the second locking portion 1312, the first locking portion 1311 and the second locking portion 1312 need to be spaced apart in the circumferential direction of the base shell 11. During actual processing, the first locking portion 1311 and the second locking portion 1312 can be arranged on both sides of the circumferential direction of the base shell 11, so that the first locking portion 1311 and the second locking portion 1312 can respectively realize their respective locking or unlocking functions.

According to one embodiment of the present invention, the base shell 11 is formed with a first through hole 111 and a second through hole 112 which are spaced apart in the circumferential direction. The first through hole 111 is suitable for the first locking portion 1311 to pass through, and the second through hole 112 is suitable for the second locking portion 1312 to pass through. The angle between the center of the first through hole 111, the center of the second through hole 112 and the center of the base shell 11 is α and satisfies: 180°≤α≤200°. Since the first locking portion 1311 and the second locking portion 1312 are arranged in the base shell 11 and need to protrude from the base shell 11 to stop against the hook body 12, the structure of the base shell 11 will affect the unlocking and locking process of the first locking portion 1311 and the second locking portion 1312. Specifically, the base shell 11 is provided with a first through hole 111 and a second through hole 112 for the first locking portion 1311 and the second locking portion 1312 to pass through. During processing, the angle between the center of the first through hole 111 and the center of the second through hole 112 and the center of the base shell 11 is α and satisfies: 180°≤α≤200°. It can be understood that the first through hole 111 and the second through hole 112 are arranged on both sides of the circumference of the base shell 11. 180°≤α≤200° can avoid mutual interference between the first locking portion 1311 and the second locking portion 1312, ensuring the normal use of the trailer hook assembly 1.

According to an embodiment of the present invention, the width of the second locking portion 1312 is greater than the width of the first locking portion 1311. During processing, the width of the second locking portion 1312 can be greater than the width of the first locking portion 1311, and a groove 102 that cooperates with the locking member 131 can be provided on the hook body 12, and the width of the groove 102 can be slightly greater than the second locking portion 1312, so as to ensure that the second locking portion 1312 can freely enter and exit the groove 102, avoid friction between the second locking portion 1312 and the side wall of the groove 102, and improve the efficiency of the second locking portion 1312 cooperating with the groove 102. At this time, the width of the first locking portion 1311 is smaller than the width of the second locking portion 1312, which can meet the respective locking and unlocking functions of the first locking portion 1311 and the second locking portion 1312 without interfering with each other, and there is no need to construct the widths of the first locking portion 1311 and the second locking portion 1312 to be the same, which can reduce the processing cost. In actual use, the ideal state is that the hook body 12 can switch between the storage state and the unfolded state by rotating 180° relative to the base shell 11, but because the width of the groove 102 is slightly larger than the second locking portion 1312, and the width of the first locking portion 1311 is smaller than the second locking portion 1312, the angle α between the first locking portion 1311 and the second locking portion 1312 satisfies the setting of 180°≤α≤200°, so that the hook body 12 can be matched with the second locking portion 1312 after rotating 180°. The range of α exceeding 180° can be understood as the range of angles between the two sides of the width of the groove 102 and the center of the base shell 11.

In some embodiments, the second locking portion 1312 can be constructed with a width that gradually increases in the direction from the free end of the second locking portion 1312 toward the slider 136 to form a chamfer. The chamfer setting can prevent the free end of the second locking portion 1312 from rubbing against the inner wall of the groove 102 when the second locking portion 1312 cooperates with the groove 102, so that the second locking portion 1312 can quickly enter the groove 102, thereby improving the sensitivity of the locking cooperation between the second locking portion 1312 and the groove 102.

According to one embodiment of the present invention, the driving member is configured as a driving shaft 14, the first driving gear 132 is disposed at the end of the driving shaft 14, and the first driving gear 132 and the second driving gear 134 are respectively coaxially disposed with the driving shaft 14. Specifically, the driving member can be configured as a driving shaft 14, one end of the driving shaft 14 is connected to the driving motor, and the end of the other end of the driving shaft 14 is fixedly connected to the first driving gear 132, that is, the first driving gear 132 rotates synchronously with the driving shaft 14. The first driving gear 132 and the second driving gear 134 are respectively coaxially disposed with the driving shaft 14, so that the rotation axis of the second driving gear 134 coincides with that of the first driving gear 132 and the two can rotate synchronously, thereby ensuring the stability of the transmission assembly 13 when transmitting torque.

According to one embodiment of the present invention, the transmission rod 135 is loosely sleeved on the outer periphery of the drive shaft 14, and the end of the transmission rod 135 is connected to the second drive gear 134. Since the transmission rod 135 and the drive shaft 14 are both arranged in the base shell 11, the arrangement of the transmission rod 135 and the drive shaft 14 will affect the assembly of the trailer hook assembly 1. Specifically, the transmission rod 135 is loosely sleeved on the outer periphery of the drive shaft 14, and the end of the transmission rod 135 is connected to the second drive gear 134. After the second drive gear 134 rotates, it can drive the transmission rod 135 to rotate. The solution that the transmission rod 135 is loosely sleeved on the outer periphery of the drive shaft 14 can improve the compactness of the internal structure layout of the base shell 11 and improve the space utilization rate.

According to one embodiment of the present invention, the slider 136 is loosely sleeved on the outer periphery of the transmission rod 135 and is threadedly engaged with the transmission rod 135. Since the slider 136 is translated under the drive of the transmission rod 135, the connection mode between the slider 136 and the transmission rod 135 will affect the movement of the slider 136. Specifically, the slider 136 is sleeved on the outer periphery of the transmission rod 135 and is threadedly engaged with the transmission rod 135. Since the transmission rod 135 is limited in the extension direction by the second driving gear 134 and the base shell 11, the transmission rod 135 can only rotate with the axis of the driving shaft 14 as the rotation axis. The transmission rod 135 is provided with an external thread, and the slider 136 is provided with an internal thread. The internal thread and the external thread are meshed with each other to realize that the transmission rod 135 drives the slider 136 to move.

According to one embodiment of the present invention, the inner wall of the accommodating cavity is formed with a first rotation limiter 1363 parallel to the transmission rod 135, and the slider 136 is provided with a second rotation limiter 114 cooperating with the first rotation limiter 1363, and the first rotation limiter 1363 and the second rotation limiter 114 are abutted against each other in the circumferential direction and are movable in the axial direction. Since the slider 136 needs to move in the base shell 11 when cooperating with the transmission rod 135, the connection relationship between the slider 136 and the base shell 11 will affect the movement of the slider 136. Specifically, the base shell 11 is provided with a first rotation limiter 1363, and the slider 136 is provided with a second rotation limiter 114, and the first rotation limiter 1363 and the second rotation limiter 114 cooperate to limit the relative rotation between the slider 136 and the base shell 11, thereby ensuring that the slider 136 only performs translational movement in the housing.

In some embodiments, the first rotation limit portion 1363 can be constructed as a concave limit groove on the slider 136, and the second rotation limit portion 114 can be constructed as a limit pin that cooperates with the base shell 11. The limit pin extends in the axial direction and is movable. During assembly, at least a portion of the limit pin is movably accommodated in the limit groove. At this time, the limit groove and the limit pin cooperate to limit the relative rotation of the slider 136 and the base shell 11 in the circumferential direction, but will not affect the relative movement of the slider 136 and the base shell 11 in the axial direction, thereby ensuring that the slider 136 can move in the base shell 11 to facilitate pushing the locking member 131 to lock or unlock.

According to one embodiment of the present invention, the hook body 12 includes a hook body shell 121 and a planet carrier 122, a mounting cavity is formed in the hook body shell 121, and at least a portion of the base shell 11 is accommodated in the mounting cavity; the planet carrier 122 is arranged in the mounting cavity and cooperates with the hook body shell 121 in the circumferential upper limit, and at least one planet gear 133 is rotatably arranged on the planet carrier 122, and the rotation axes of the plurality of planet gears 133 are orthogonal to the axis of the first driving gear 132. Since the hook body 12 is a structure having a storage state and an unfolded state in the trailer hook assembly 1, the structure of the hook body 12 will affect the use of the trailer hook assembly 1. Specifically, the hook body 12 is provided with a hook body shell 121 and a planet carrier 122, a mounting cavity is formed in the hook body shell 121, and at least a portion of the base shell 11 is accommodated in the mounting cavity, and the assembly method of the base shell 11 and the hook body 12 reduces the space occupied by the trailer hook assembly 1 in the axial direction and improves the compactness of the structure. The planet carrier 122 is also arranged in the installation cavity and cooperates with the hook housing 121 in the circumferential limit position to prevent relative rotation between the planet carrier 122 and the hook housing 121. During processing, a convex rib extending in the axial direction may be arranged on the planet carrier 122, and a sunken groove extending in the axial direction may be arranged in the hook housing 121. When the planet carrier 122 and the hook housing 121 are assembled, at least part of the convex rib is accommodated in the sunken groove, and the convex rib cooperates with the sunken groove to limit the relative rotation between the planet carrier 122 and the hook housing 121.

Two planetary gears 133 are rotatably arranged on the planetary carrier 122, and the rotation axes of the two planetary gears 133 are orthogonal to the axis of the first driving gear 132, so that the planetary gears 133 can drive the planetary carrier 122 to rotate with the axis of the first driving gear 132 as the rotation axis, thereby realizing the rotation of the hook body shell 121 relative to the base shell 11, and further realizing the switching of the hook body 12 between the storage state and the unfolded state.

According to one embodiment of the present invention, a first locking member is provided on the side of the hook body shell 121 facing the installation cavity, and a second locking member is provided on the outer surface of the base shell 11. The first locking member and the second locking member are suitable for cooperating when the hook body shell 121 is rotated to the storage state and/or the expanded state to limit the rotation of the base shell 11 and the hook body shell 121. During processing, the hook body shell 121 can be provided with a first locking member on the side facing the installation cavity, and the outer surface of the base shell 11 is provided with a second locking member. The second locking member can cooperate with the first locking member in the expanded state or the storage state to limit the relative rotation of the base shell 11 and the hook body shell 121, and play a pre-tightening function.

In actual processing, the first locking member can be constructed as a steel ball 101, which is elastically connected to the hook body shell 121. The second locking member can be constructed as a third through hole 113 corresponding to the steel ball 101 and arranged on the base shell 11. The third through hole 113 is arranged at intervals from the first through hole 111 and the second through hole 112. When the hook body 12 rotates to the storage state or the unfolded state, the steel ball 101 is directly opposite to the third through hole 113 and at least part of the steel ball 101 can be pushed into the third through hole 113 by the spring to achieve pre-tightening, so as to avoid the hook body 12 and the base shell 11 from being unable to maintain relative stability when the first locking part 1311 or the second locking part 1312 is damaged. When the hook body 12 needs to rotate, the steel ball 101 can be pushed out of the third through hole 113 by the side wall of the third through hole 113, so as to avoid the restriction of the rotation of the hook body 12 by the steel ball 101. In addition, the third through hole 113 can be constructed as two spaced apart on the outer surface of the base shell 11 during processing. The two third through holes 113 are symmetrically arranged relative to the axis of the base shell 11. The steel ball 101 can fall into one of the third through holes 113 in the stored state and the expanded state respectively. The two third through holes 113 can respectively realize the pre-tightening function of the steel ball 101 in the stored state and the expanded state.

The vehicle according to the present invention will be briefly described below.

The vehicle according to the present invention includes the trailer hook assembly 1 in the above embodiment. Since the vehicle according to the present invention is provided with the trailer hook assembly 1 in the above embodiment, the trailer hook assembly 1 can switch between the storage state and the deployment state of the trailer hook assembly 1 by driving the transmission assembly 13 through the driving member to drive the hook body 12 to rotate. The overall process is simple and convenient. While improving the vehicle's mounting capacity, it reduces the difficulty of use and improves the user experience of the vehicle.

In summary, the starting process of the trailer hook assembly 1 can be simply summarized as follows: when the hook body 12 is in the stowed state, the slider 136 is located at one end of the transmission rod 135, and at least a portion of the first locking portion 1311 is received in the groove 102. When the trailer hook assembly 1 is switched from the stowed state to the deployed state, the driving member drives the first driving gear 132 to rotate, the first driving gear 132 drives the second driving gear 134 to rotate through the rotation of the planetary gear 133, the second driving gear 134 drives the transmission rod 135 to rotate, the slider 136 translates along the transmission rod 135 toward the other end of the transmission rod 135, the first locking portion 1311 slides along the first guide slope 1361 and disengages from the groove 102 in the hook body 12, and at the same time, the second locking portion 1312 The hook body 121 slides along the second guide inclined surface 1362 and approaches the inner wall of the hook body housing 121. When the first locking portion 1311 is completely disengaged from the groove 102, the second locking portion 1312 just stops against the inner wall of the hook body housing 121, the slider 136 is limited and cannot move, the transmission rod 135 cannot rotate, and the second driving gear 134 stops rotating at the same time. At this time, the planetary gear 133 revolves around the axis of the driving shaft 14, and the planetary carrier 122 rotates around the axis of the driving shaft 14 under the drive of the planetary gear 133 and drives the hook body 121. The housing 121 rotates, and when the hook housing 121 rotates to a preset position, the groove 102 is directly opposite to the second locking portion 1312. At this time, there is a gap between the first locking portion 1311 and the inner wall of the hook housing 121, thereby avoiding the restriction of the first locking portion 1311 on the movement of the slider 136, and the second locking portion 1312 can move toward the groove 102. Therefore, the translation of the slider 136 is not restricted, and the slider 136 can continue to move toward the other end of the transmission rod 135. At this time, the transmission rod 135 can rotate, and the second driving rod 135 can rotate. The moving gear 134 can also rotate, the planetary gear 133 only rotates, the hook body 12 no longer rotates, and the second guide slope 1362 pushes the second locking portion 1312 again until the second locking portion 1312 is pushed to abut against the inner wall of the groove 102 to achieve the locking function of the second locking portion 1312, preventing the hook body 12 from moving relative to the base shell 11. When the second locking portion 1312 is locked, the driving member is closed, the transmission assembly 13 no longer moves, the hook body 12 is in an unfolded state, and the trailer hook assembly 1 can tow other vehicles or objects. The closing process of the trailer hook assembly 1 is opposite to the starting process, and the principle is the same, so it will not be described in detail here.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

In the description of the present invention, "plurality" means two or more.

In the description of the present invention, a first feature being “on” or “under” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact with each other but are in contact with each other via another feature therebetween.

In the description of the present invention, “on”, “over” and “above” a first feature from a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims (15)

1. A draft gear assembly, comprising:

a base shell;

The hook body is rotatably arranged on the base shell and has an unfolding state and a storage state;

The transmission assembly is respectively linked with the base shell and the hook body, and locks the hook body and the base shell in the unfolding state and/or the storage state respectively;

the driving piece is suitable for driving the transmission assembly to drive the hook body to rotate relative to the base shell so as to switch between the unfolding state and the storage state.

2. A tow hook assembly according to claim 1, wherein the drive member is adapted to drive the transmission assembly to unlock the hook body from the base housing in the stowed condition and/or to drive the transmission assembly to unlock the hook body from the base housing in the deployed condition.

3. The trailer hook assembly of claim 2 wherein the base housing is provided with a receiving cavity, the hook body being sleeved on the outer periphery of the base housing;

The transmission assembly includes: the locking piece is at least partially accommodated in the accommodating cavity, is linked with the driving piece, protrudes out of the outer surface of the base shell under the driving of the driving piece, and is matched with the hook body so as to lock the hook body and the base shell.

4. A tow hook assembly according to claim 3, wherein the transmission assembly further comprises:

the first driving gear is connected with the driving piece;

the planetary gear is rotatably arranged on the hook body and meshed with the first driving gear;

a second drive gear meshed with the planetary gear;

The transmission rod is connected with the second driving gear;

The sliding block is in limit fit with the base shell so as to be arranged in the accommodating cavity in a translatable mode, and the sliding block is suitable for driving the locking piece under the driving of the transmission rod.

5. The tow hook assembly of claim 4, wherein the lock comprises:

A first locking portion and a second locking portion;

The sliding block is provided with a first guide inclined plane matched with the first locking part and a second guide inclined plane matched with the second locking part; wherein the method comprises the steps of

The sliding block is arranged at one end of the transmission rod in the storage state, and the first guide inclined surface is inclined away from the inner wall of the accommodating cavity in the direction towards the other end of the transmission rod;

In the unfolded state, the sliding block is arranged at the other end of the transmission rod, and the second guide inclined surface inclines away from the inner wall of the accommodating cavity in the direction towards one end of the transmission rod.

6. The trailer coupler assembly of claim 5, wherein the first and second lock portions are spaced apart in a circumferential direction of the base housing.

7. The trailer hook assembly of claim 6 wherein the base housing is formed with first and second circumferentially spaced apart vias, the first via being adapted for passage of the first locking portion and the second via being adapted for passage of the second locking portion, an angle α between a center of the first via and a center of the second via and a center of the base housing being: alpha is more than or equal to 180 degrees and less than or equal to 200 degrees.

8. The tow hook assembly of claim 7, wherein the second latch portion has a width that is greater than a width of the first latch portion.

9. The hitch assembly of claim 4, in which the drive member is configured as a drive shaft, the first drive gear being disposed at an end of the drive shaft, the first drive gear and the second drive gear being disposed coaxially with the drive shaft, respectively.

10. The trailer hitch assembly of claim 9, wherein the transfer bar is blank around the outer circumference of the drive shaft and an end of the transfer bar is connected to the second drive gear.

11. The draft gear assembly according to claim 4, wherein said slide is hollow about the periphery of said drive rod and threadedly engaged therewith.

12. The draft gear assembly according to claim 4, wherein the inner wall of said receiving cavity is formed with a first rotation limiting portion parallel to said drive rod, said slider is provided with a second rotation limiting portion engaged with said first rotation limiting portion, said first rotation limiting portion being circumferentially stopped against said second rotation limiting portion and axially movable.

13. The tow hook assembly of claim 4, wherein the hook body comprises:

a hook body shell, wherein a mounting cavity is formed in the hook body shell, and at least part of the base shell is accommodated in the mounting cavity;

The planet carrier is arranged in the mounting cavity and in limit fit with the hook body shell in the circumferential direction, at least one planet gear is rotatably arranged on the planet carrier, and the rotating shafts of the planet gears are orthogonal with the axis of the first driving gear.

14. A tow hook assembly according to claim 13, wherein the hook body housing is provided with a first locking member on a side facing the mounting cavity, the outer surface of the base housing being provided with a second locking member, the first and second locking members being adapted to cooperate to limit rotation of the base housing and the hook body housing when the hook body housing is rotated to a stowed and/or deployed condition.

15. A vehicle comprising a tow hook assembly as claimed in any one of claims 1 to 14.