CN219339121U

CN219339121U - Trailer hook assembly and vehicle

Info

Publication number: CN219339121U
Application number: CN202223341033.1U
Authority: CN
Inventors: 于志伟
Original assignee: China Express Jiangsu Technology Co Ltd
Current assignee: China Express Jiangsu Technology Co Ltd
Priority date: 2022-12-13
Filing date: 2022-12-13
Publication date: 2023-07-14
Anticipated expiration: 2032-12-13

Abstract

The utility model relates to the technical field of vehicles and discloses a trailer hook assembly and a vehicle, wherein the trailer hook assembly comprises a trailer hook, a fixing piece, a locking sleeve and a locking piece; the trailer hook comprises a rod body, and a locking groove is formed in the rod body; the fixing piece is provided with a connecting groove and a mounting hole, the locking sleeve is sleeved on the outer wall of the fixing piece, and a limiting protrusion and a position avoiding groove are formed on the inner wall of the locking sleeve; the locking piece is arranged in the mounting hole; when the locking sleeve is placed at the first position, the limiting protrusion can enable the locking piece to be embedded into the locking groove along the mounting hole; when the locking sleeve is placed at the second position, the rod body can enable the locking piece to be embedded into the avoidance groove along the mounting hole; the trailer hook assembly provided by the utility model can realize rapid installation and rapid disassembly between the trailer hook and the fixing piece, shortens the operation time and is convenient to use.

Description

Trailer hook assembly and vehicle

Technical Field

The utility model relates to the technical field of vehicles, in particular to a trailer hook assembly and a vehicle.

Background

The main function of the trailer hook assembly is to separate the vehicle from the bad road conditions and pull other non-powered or power damaged vehicles; at present, most of trailer couplers in the trailer coupler assembly are assembled on a fixing piece in a threaded fit mode, but the threaded length of the threaded fit assembly mode is long, so that operators can only finish the installation and the disassembly between the trailer coupler and the fixing piece after taking a long time, the operation time is long, and the use is inconvenient.

Disclosure of Invention

The utility model aims to provide a trailer hook assembly and a vehicle comprising the same, wherein the trailer hook assembly can realize quick installation and quick disassembly between a trailer hook and a fixing piece, shortens the operation time and is convenient to use.

In order to achieve the above object, the present utility model provides a trailer hook assembly, comprising a trailer hook, a fixing member, a locking sleeve and a locking member;

the trailer hook comprises a rod body, and a locking groove is formed in the rod body; the fixing piece is provided with a connecting groove and a mounting hole, the connecting groove is used for the rod body to be inserted, the mounting hole is communicated with the connecting groove, and the fixing piece is provided with a first position and a second position; the locking sleeve is sleeved on the outer wall of the fixing piece and can move to the first position or the second position along the fixing piece, and a limiting protrusion and a position avoiding groove are formed on the inner wall of the locking sleeve; the locking piece is arranged in the mounting hole;

when the locking sleeve is placed at the first position, the position of the limiting protrusion corresponds to the position of the mounting hole, and the limiting protrusion can embed the locking piece into the locking groove along the mounting hole; when the locking sleeve is placed at the second position, the position of the avoidance groove corresponds to the position of the mounting hole, and the rod body can enable the locking piece to be embedded into the avoidance groove along the mounting hole.

In some embodiments, the trailer hook assembly further comprises a first elastic member disposed between the fixing member and the locking sleeve, wherein an elastic force of the first elastic member can push the locking sleeve from the second position to the first position.

In some embodiments, the inner wall of the locking groove is arc-shaped along the direction in which the rod body is inserted into the connecting groove.

In some embodiments, the locking groove is an annular locking groove formed in a circumferential direction of the rod body.

Further, the number of the mounting holes is multiple, the mounting holes are distributed around the central axis of the connecting groove in sequence, and the locking pieces are in one-to-one correspondence with the mounting holes.

The limiting protrusion is an annular limiting protrusion formed on the circumferential direction of the inner wall of the locking sleeve.

The avoidance groove is an annular avoidance groove formed on the circumferential direction of the inner wall of the locking sleeve.

In some embodiments, the locking member is a spherical locking member.

Further, the inner diameter of the mounting hole is reduced from large to small along the direction from the outer wall of the connecting groove to the inner wall of the connecting groove; the diameter of the spherical locking piece is a, the maximum diameter of the mounting hole is b, and the minimum diameter of the mounting hole is e, wherein b is more than a is more than e.

In some embodiments, the vehicle further comprises an unlocking component, wherein the unlocking component is arranged on the trailer hook; when the rod body is inserted into the connecting groove, the unlocking component can push the locking sleeve from the first position to the second position.

Further, the unlocking assembly comprises an unlocking sleeve, the unlocking sleeve is sleeved on the outer wall of the rod body, the rod body is provided with a third position and a fourth position, and the unlocking sleeve can move between the third position and the fourth position along the rod body; when the rod body is inserted into the connecting groove, the unlocking sleeve is moved from the third position to the fourth position, and the unlocking sleeve can push the locking sleeve to be pushed from the first position to the second position.

Further, the unlocking assembly further comprises a second elastic piece, and the second elastic piece is arranged between the rod body and the unlocking sleeve; wherein the elastic force of the second elastic piece can push the unlocking sleeve from the fourth position to the third position.

The utility model also provides a vehicle comprising a towing hook assembly according to any one of the preceding claims.

Compared with the prior art, the trailer hook assembly has the beneficial effects that: placing the locking sleeve in the first position can enable the locking piece to be embedded into the locking groove so as to achieve locking between the trailer hook and the fixing piece, and placing the locking sleeve in the second position can enable the locking piece to be separated from the locking groove so as to achieve unlocking between the trailer hook and the fixing piece; therefore, the locking sleeve is moved between the first position and the second position, so that the locking and unlocking between the trailer hook and the fixing piece can be completed, the quick installation and the quick disassembly between the trailer hook and the fixing piece are realized, the operation time is short, and the use is convenient.

Drawings

FIG. 1 is a block diagram of a towing hook assembly provided in accordance with an embodiment of the present utility model;

FIG. 2 is a cross-sectional view of a draft gear assembly provided by an embodiment of the present utility model;

FIG. 3 is an exploded view of a trailer hook assembly provided in accordance with an embodiment of the present utility model;

FIG. 4 is a schematic view of a locking sleeve according to an embodiment of the present utility model mounted to a fixture;

FIG. 5 is a schematic diagram showing the dimensional relationship between the mounting hole and the locking member according to an embodiment of the present utility model;

FIG. 6 is a schematic view of a first elastic member according to an embodiment of the present utility model mounted on a fixing member;

FIG. 7 is a schematic diagram of an unlock sleeve mounted to a trailer hitch according to an embodiment of the present utility model;

fig. 8 is a schematic diagram of a second elastic member according to an embodiment of the present utility model mounted on a trailer hook.

In the figure, 1, a trailer hook; 11. a rod body; 12. hanging rings; 111. a locking groove;

2. a fixing member; 21. a connecting groove; 22. a mounting hole; 201. a first limit part;

4. a locking sleeve; 41. a limit protrusion; 42. a clearance groove; 401. a second limit part;

5. a first elastic member;

6. a locking member;

7. unlocking the assembly; 71. unlocking the sleeve; 72. a second elastic member; 701. and a third limit part.

101. The first limiting clamp spring; 102. the second limiting clamp spring; 103. and a third limiting clamp spring.

Detailed Description

The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples. The following examples are illustrative of the utility model and are not intended to limit the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

As shown in fig. 1-3, a preferred embodiment of the present utility model is a trailer coupler assembly comprising a trailer coupler 1, a securing member 2, a locking sleeve 4, and a locking member 6.

The trailer hook 1 comprises a rod body 11, and the rod body 11 is provided with a locking groove 111; the fixing piece 2 is provided with a connecting groove 21 and a mounting hole 22, the connecting groove 21 is used for inserting the rod body 11, the mounting hole 22 is communicated with the connecting groove 21, and the fixing piece 2 is provided with a first position and a second position; the locking sleeve 4 is sleeved on the outer wall of the fixing piece 2 and can move to a first position or a second position along the fixing piece 2, and a limit protrusion 41 and a avoidance groove 42 are formed on the inner wall of the locking sleeve 4; the locking piece 6 is connected in the mounting hole 22;

wherein, when the locking sleeve 4 is placed at the first position, the position of the limiting protrusion 41 corresponds to the position of the mounting hole 22, and the limiting protrusion 41 can embed the locking piece 6 into the locking groove 111 along the mounting hole 22; when the locking sleeve 4 is placed in the second position, the position of the keep-out recess 42 corresponds to the position of the mounting hole 22, and the rod body 11 is able to insert the locking member 6 into the keep-out recess 42 along the mounting hole 22.

Based on the technical scheme, the locking sleeve 4 is placed at the first position, so that the locking piece 6 is embedded into the locking groove 111 to realize locking between the trailer hook 1 and the fixed piece 2, and the locking sleeve 4 is placed at the second position, so that the locking piece 6 can be separated from the locking groove 111 to realize unlocking between the trailer hook 1 and the fixed piece 2; therefore, the locking sleeve 4 is moved between the first position and the second position, so that the locking and unlocking between the trailer hook 1 and the fixing piece 2 can be finished, the quick installation and the quick disassembly between the trailer hook 1 and the fixing piece 2 are realized, the operation time is short, and the use is convenient.

The connection groove 21 may be a hole penetrating the fixing member 2 in the insertion direction of the rod body 11, or may be a groove not penetrating the fixing member 2 in the insertion direction of the rod body 11.

The trailer hook 1 further comprises a hanging ring 12, and the hanging ring 12 is connected to one end of the rod body 11.

The inner wall of the locking groove 111 is curved in the direction in which the rod body 11 is inserted into the coupling groove 21. The locking groove 111 with the arc-shaped inner wall is adopted, so that the locking piece 6 is conveniently embedded into the locking groove 111 along an arc line or separated from the locking groove 111 along an arc line.

The avoidance groove 42 has a first inner side wall extending obliquely away from the central axis of the avoidance groove 42 in the direction from the outer wall of the connection groove 21 to the inner wall of the connection groove 21.

In the present embodiment, the inner wall of the locking groove 111 has a semicircular arc shape.

Referring to fig. 2, 3, 4 and 6, the trailer hook assembly according to the embodiment of the present utility model further includes a first elastic member 5, where the first elastic member 5 is disposed between the fixing member 2 and the locking sleeve 4, and the elastic force of the first elastic member 5 can push the locking sleeve 4 from the second position to the first position. The locking sleeve 4 can be maintained at the first position through the first elastic piece 5, so that the phenomenon that the trailer hook 1 and the fixing piece 2 are unlocked suddenly in a locking state is avoided, the installation stability between the trailer hook 1 and the fixing piece 2 is guaranteed, and the safety is high.

In this embodiment, the first elastic member 5 is a first spring.

In this embodiment, the fixing member 2 includes a first section and a second section sequentially connected along a direction in which the rod body 11 is inserted into the connecting groove 21, an outer diameter of the second section is larger than an outer diameter of the first section, a first limiting portion 201 is formed between the second section and the first section, the locking sleeve 4 includes a third section and a fourth section along a direction in which the rod body 11 is inserted into the connecting groove 21, an inner diameter of the third section is smaller than an inner diameter of the fourth section, a second limiting portion 401 is formed between the third section and the fourth section, a third section limiting protrusion 41 and a clearance groove 42 are formed between an outer wall of the first section, between an inner wall of the second limiting portion 401 and an inner wall of the fourth section, and between the first limiting portions 201, and the first elastic member 5 is disposed in the mounting cavity.

One end of the first section, which is far away from the second section, is fixed with a first limiting clamp spring 101, and the first limiting clamp spring 101 is used for preventing the locking sleeve 4 from being separated from the fixing piece 2.

The working process of the trailer hook assembly provided by the embodiment is as follows: when the required trailer hook 1 is mounted to the fixing piece 2, the locking sleeve 4 is pushed from the first position to the second position by applying an external force to the locking sleeve 4, then the rod body 11 is inserted into the connecting groove 21, the outer side wall of the rod body 11 is contacted with the locking piece 6, and the locking piece 6 is embedded into the avoidance groove 42 until the position of the locking groove 111 corresponds to the position of the mounting hole 22; and the external force applied to the locking sleeve 4 is canceled, the first elastic piece 5 pushes the locking sleeve 4 from the second position to the first position, the limiting protrusion 41 is in contact with the locking piece 6 and embeds the locking piece 6 into the locking groove 111, so that the locking between the trailer hook 1 and the fixing piece 2 can be realized, the installation between the trailer hook 1 and the fixing piece 2 is realized, the operation is simple, the installation time is short, and the use is convenient.

When the trailer hook 1 needs to be detached from the fixing piece 2, the external force is applied to the locking sleeve 4, the locking sleeve 4 is pushed to the second position from the first position, and then the rod body 11 is pulled out of the connecting groove 21, so that the operation is simple, the detachment time is short, and the use is convenient.

Referring to fig. 2, 3 and 8, the locking groove 111 according to the embodiment of the present utility model is an annular locking groove formed on the circumference of the rod 11.

The trailer hook and the trailer body in the prior art are rigidly connected, when the vehicle passes through a twisted road surface, the axle of the trailer and the axle of the main vehicle have angle difference, the trailer can give a larger reaction torque to the main vehicle, and the risk of damage and even rollover of the main vehicle can be caused when the torque is too large. The annular locking groove is adopted to unload torsion acting force in the dragging process of the trailer hook 1 and the fixing piece 2, so that the problems of damage and rollover of the trailer hook 1 are avoided; meanwhile, the annular locking groove is adopted, so that an operator can directly insert the rod body 11 into the connecting groove 21 without considering the one-to-one correspondence between the locking piece and the locking groove 111, the operation is simplified, and the quick installation of the trailer hook 1 and the fixing piece 2 is facilitated.

The limit projection 41 is an annular limit projection formed on the inner wall circumference of the locking sleeve 4, and the clearance groove 42 is an annular clearance groove formed on the inner wall circumference of the locking sleeve 4.

The number of the mounting holes 22 is multiple, the plurality of mounting holes 22 are distributed around the central axis of the connecting groove 21 in sequence, and the locking pieces 6 are in one-to-one correspondence with the mounting holes 22.

In the present embodiment, the mounting holes 22 are provided with six.

Referring to fig. 2-6, the locking member 6 according to the embodiment of the present utility model is a spherical locking member. The adoption of the spherical locking piece is convenient for the locking piece 6 to be embedded into the locking groove 111 or be separated from the locking groove 111, in addition, the spherical locking piece can be matched with the annular locking groove in a coordinated manner so as to further unload the torsion acting force in the dragging process of the trailer hook 1 and the fixing piece 2, and avoid the damage of the trailer hook 1 and the problem of turning over.

The inner diameter of the mounting hole 22 is reduced from large to small along the direction from the outer wall of the connection groove 21 to the inner wall of the connection groove 21; wherein the diameter of the spherical locking element is a, the maximum diameter of the mounting hole 22 is b, and the minimum diameter of the mounting hole 22 is e, b > a > e. The mode of b & gta & gte is adopted, so that the spherical locking piece can be connected to the mounting hole 22 to prevent the spherical locking piece from falling into the connecting groove 21, the function that the limiting protrusion 41 is used for embedding the spherical locking piece into the locking groove 111 or the rod body 11 to eject the spherical locking piece to the avoidance groove 42 can be realized, and the spherical locking device is simple in structure and ingenious in conception.

Referring to fig. 2, 7 and 8, the trailer hook assembly provided by the embodiment of the utility model further includes an unlocking component 7, where the unlocking component 7 is disposed on the trailer hook 1; wherein, when the rod body 11 is inserted into the connecting groove 21, the unlocking component 7 can push the locking sleeve 4 from the first position to the second position.

The unlocking component 7 comprises an unlocking sleeve 71, the unlocking sleeve 71 is sleeved on the outer wall of the rod body 11, the rod body 11 is provided with a third position and a fourth position, and the unlocking sleeve 71 can move between the third position and the fourth position along the rod body 11; wherein when the rod body 11 is inserted into the connecting groove 21, the unlocking sleeve 71 is moved from the third position to the fourth position, and the unlocking sleeve 71 can push the locking sleeve 4 from the first position to the second position. The unlocking sleeve 71 is adopted, so that the quick installation and the quick disassembly between the trailer hook 1 and the fixing piece 2 are facilitated, and the operation time of operators is shortened.

The unlocking assembly 7 further comprises a second elastic piece 72, and the second elastic piece 72 is arranged between the rod body 11 and the unlocking sleeve 71; wherein the elastic force of the second elastic member 72 can push the unlocking sleeve 71 from the fourth position to the third position. By adopting the second elastic member 72, the operator does not need to move the unlocking sleeve 71 from the fourth position to the third position, and the operation time of the operator can be further shortened.

In this embodiment, the second elastic member 72 is a second spring.

A locking structure is formed by the locking sleeve 4, the first elastic piece 5, the locking piece 6 and the locking groove 111, and then an unlocking structure is formed by the unlocking sleeve 71 and the second elastic piece 72;

when the trailer hook 1 needs to be mounted on the fixing piece 2, an operator only needs to hold the trailer hook 1 and move the unlocking sleeve 71 from the third position to the fourth position of the rod body, then insert the rod body 11 into the connecting groove 21 until a blocking sense is met (the locking piece 6 above the rod body 11 falls into the locking groove 111 under the action of gravity, and then continuously insert the rod body 11 into the connecting groove 21, the locking piece 6 provides a resistance which can be sensed by the operator and is the cause of forming the blocking sense), and then release the unlocking sleeve 71, so that the fixed connection between the trailer hook 1 and the fixing piece 2 can be completed; if the operator is familiar with the present draft gear assembly, only 1 second is required to complete the installation between the draft gear 1 and the fixing member 2.

When the trailer hook 1 needs to be detached from the fixing piece 2, an operator only needs to push the unlocking sleeve 71 from the third position to the fourth position along the rod body 11, then the rod body 11 is pulled out of the connecting groove 21, and the detachment between the trailer hook 1 and the fixing piece 2 can be completed in 1 second.

In the embodiment, a second limit clamp spring 102 and a third limit clamp spring 103 which are sequentially and alternately distributed along the axial direction of the rod body 11 are fixed on the outer wall of the rod body 11; the unlocking sleeve 71 comprises a fifth section and a sixth section which are sequentially connected along the direction that the rod body 11 is inserted into the connecting groove 21, the inner diameter of the fifth section is smaller than that of the sixth section, a third limiting part 701 is formed between the fifth section and the sixth section, and the second elastic piece 72 is arranged between the third limiting part 701 and the second limiting clamp spring 102.

The embodiment of the utility model also provides a vehicle, which comprises the trailer hook assembly.

In summary, the trailer hook assembly provided by the embodiment of the utility model has the following beneficial effects:

1. the quick mounting and quick dismounting between the trailer hook 1 and the fixing piece 2 can be realized by adopting the locking groove 111, the locking sleeve 4, the limiting protrusion 41, the avoiding groove 42 and the locking piece 6, and the quick mounting and quick dismounting device is short in operation time and convenient to use.

2. The adoption of the first elastic piece 5 can avoid the abrupt unlocking of the trailer hook 1 and the fixing piece 2 in the locking state, ensure the installation stability between the trailer hook 1 and the fixing piece 2 and have high safety.

3. The annular locking groove is adopted, so that torsion acting force in the dragging process of the trailer hook 1 and the fixing piece 2 can be unloaded, the problems of damage and rollover of the trailer hook 1 are avoided, and the installation speed between the trailer hook 1 and the fixing piece 2 can be improved.

4. The use of a spherical locking member can facilitate the insertion of the locking member 6 into the locking groove 111 or the removal of the locking groove 111.

5. The mode of b & gta & gte is adopted, so that the spherical locking piece can be arranged in the connecting groove, the spherical locking piece is prevented from falling into the connecting groove 21, the spherical locking piece can realize locking and unlocking functions between the trailer hook 1 and the fixing piece, the structure is simple, and the conception is ingenious.

6. By adopting the unlocking sleeve 71, when an operator pushes the locking sleeve 4 from the first position to the second position, the installation speed and the disassembly speed between the trailer hook 1 and the fixing piece 2 are improved, and the operation time is shortened.

7. With the second elastic member 72, the operator is not required to move the unlocking sleeve 71 from the fourth position to the third position, and the operation time can be further shortened.

8. Adopt locking groove 111, locking sleeve 4, spacing protruding 41, keep away a recess 42, locking piece 6, first elastic component 5, unblock sleeve 71 and second elastic component 72, can realize that 1 second between trailer hook 1 and the mounting 2 is installed and 1 second is dismantled, shorten operating personnel's exposure time on the road surface, reduce the risk.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present utility model, and these modifications and substitutions should also be considered as being within the scope of the present utility model.

Claims

1. A trailer coupler assembly, comprising:

the trailer comprises a trailer body, wherein the trailer body is provided with a locking groove;

the fixing piece is provided with a connecting groove and a mounting hole, the connecting groove is used for the rod body to be inserted, the mounting hole is communicated with the connecting groove, and the fixing piece is provided with a first position and a second position;

the locking sleeve is sleeved on the outer wall of the fixing piece and can move to the first position or the second position along the fixing piece, and a limiting protrusion and a position avoiding groove are formed on the inner wall of the locking sleeve;

the locking piece is connected in the mounting hole;

when the locking sleeve is placed at the first position, the position of the limiting protrusion corresponds to the position of the mounting hole, and the limiting protrusion can embed the locking piece into the locking groove along the mounting hole;

when the locking sleeve is placed at the second position, the position of the avoidance groove corresponds to the position of the mounting hole, and the rod body can enable the locking piece to be embedded into the avoidance groove along the mounting hole.

2. The trailer coupler assembly of claim 1, further comprising a first resilient member disposed between the securing member and the locking sleeve, the resilient force of the first resilient member being capable of urging the locking sleeve from the second position to the first position.

3. The trailer coupler assembly of claim 1, wherein the locking groove is an annular locking groove formed in a circumferential direction of the lever body.

4. A trailer hook assembly as claimed in claim 3 wherein said plurality of mounting holes are provided in a plurality and said plurality of mounting holes are sequentially distributed about said connecting slot central axis, said locking members being in one-to-one correspondence with said mounting holes.

5. The trailer coupler assembly of claim 1, wherein the lock is a spherical lock.

6. The draft gear assembly according to claim 5, wherein the inner diameter of said mounting hole is reduced from large to small in a direction from the outer wall of said coupling groove to the inner wall of said coupling groove;

the diameter of the spherical locking piece is a, the maximum diameter of the mounting hole is b, and the minimum diameter of the mounting hole is e, wherein b is more than a is more than e.

7. The draft gear assembly according to any one of claims 1 to 6, further comprising an unlocking assembly provided on said draft gear;

when the rod body is inserted into the connecting groove, the unlocking component can push the locking sleeve from the first position to the second position.

8. The tow hook assembly of claim 7, wherein the unlocking component comprises an unlocking sleeve that is sleeved on an outer wall of the lever body, the lever body having a third position and a fourth position thereon, the unlocking sleeve being movable along the lever body between the third position and the fourth position;

when the rod body is inserted into the connecting groove, the unlocking sleeve is moved from the third position to the fourth position, and the unlocking sleeve can push the locking sleeve to be pushed from the first position to the second position.

9. The draft gear assembly according to claim 8, wherein said release member further includes a second resilient member, said second resilient member being disposed between said lever body and said release sleeve;

wherein the elastic force of the second elastic piece can push the unlocking sleeve from the fourth position to the third position.

10. A vehicle comprising a towing hook assembly as claimed in any one of claims 1 to 9.