towing device

Abstract

This utility model provides a towing device. The towing device includes a main body, a towing assembly, and a locking mechanism. The main body includes a towing end and a mounting end. The mounting end has a tubular channel extending in a predetermined direction. First and second through holes communicating with the tubular channel are correspondingly formed on opposite sides of the mounting end. The towing assembly is disposed on the towing end. The locking mechanism includes a drive assembly, a transmission assembly, and a locking assembly connected in sequence. The transmission assembly and the locking assembly are respectively disposed within the tubular channel. The locking assembly includes a mirror-symmetrical first locking block and a second locking block. The first locking block has a first locking portion matching the first through hole, and the second locking block has a second locking portion matching the second through hole. When the drive assembly drives the locking assembly through the transmission assembly, the first and second locking portions reciprocate synchronously inside and outside the mounting end through the first and second through holes, respectively.

Description

Technical Field

[0001] This utility model relates to the field of vehicle traction device technology, and in particular to a towing device. Background Technology

[0002] Installing a towing device on a vehicle is a common vehicle modification. Towing devices allow a vehicle to tow and transport various items, such as boats, cars, motorcycles, maintenance equipment, and other items that are unsuitable or unsuitable for ordinary vehicles.

[0003] Most modern vehicles use ball-shaped hook assemblies for towing. Ball-shaped hook assemblies typically have a rectangular tubular insert structure and at least two aligned mounting pin holes on opposite sides. When installing a vehicle towing device, the rectangular tubular insert structure is aligned with the target vehicle's receiving device, and then one or more additional pins are aligned with the mounting pin holes to install the towing device onto the target vehicle.

[0004] However, the installation method between the aforementioned vehicle towing device and the target vehicle has a flaw. In this device, the additional pin is easily lost, which prevents the user from quickly installing it in case of emergencies.

[0005] Therefore, how to improve the vehicle traction device to avoid the above-mentioned defects is a technical problem that urgently needs to be solved. Utility Model Content

[0006] The purpose of this utility model is to provide a towing device that enables users to quickly install it in response to emergencies.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] This utility model provides a towing device, which includes a device body, a towing assembly, and a locking mechanism. The device body includes a towing end and a mounting end. The mounting end has a tubular channel extending in a preset direction inside. A first through hole and a second through hole communicating with the tubular channel are correspondingly opened on opposite sides of the mounting end. The towing assembly is disposed on the towing end. The locking mechanism includes a drive assembly, a transmission assembly, and a locking assembly connected in sequence. The transmission assembly and the locking assembly are respectively disposed in the tubular channel. The locking assembly includes a first locking block and a second locking block that are mirror-symmetrical. The first locking block is provided with a first locking part that matches the first through hole, and the second locking block is provided with a second locking part that matches the second through hole. When the drive assembly drives the locking assembly through the transmission assembly, the first locking part and the second locking part reciprocate synchronously inside and outside the mounting end through the first through hole and the second through hole, respectively.

[0009] Furthermore, the driving assembly includes a first toothed transmission structure disposed inside the tubular channel; the transmission assembly includes a transmission shaft disposed in the tubular channel and extending in the same direction as the tubular channel, a second toothed transmission structure meshing with the first toothed transmission structure is disposed at the end of the transmission shaft near the first toothed transmission structure, and a threaded structure is disposed at the end of the transmission shaft away from the second toothed transmission structure; the locking assembly also includes a first slider, the first slider being screwed to the threaded structure and being able to slide back and forth along the tubular channel via the transmission shaft; the first slider is provided with a first guide groove and a second guide groove, the first guide groove and the second guide groove being mirror symmetrical and forming an angle along the extension direction of the tubular channel, the first locking block and the second locking block are respectively provided with a first guide portion and a second guide portion, the first locking block being slidably connected to the first guide groove through the first guide portion, and the second locking block being slidably connected to the second guide groove through the second guide portion.

[0010] Furthermore, a third through hole communicating with the tubular channel is provided on one side of the mounting end; the drive assembly also includes a drive shaft, a first toothed transmission structure is disposed on the drive shaft, and the drive shaft passes through the third through hole, so that the first toothed transmission structure is built into the tubular channel and can rotate within the tubular channel.

[0011] Furthermore, the locking assembly also includes a second slider; the first slider is also provided with a third guide portion extending in the same direction as the tubular channel, the bottom of the third guide portion has a first inclined surface, the second slider is provided with a third guide groove corresponding to the third guide portion, the third guide groove is provided with a second inclined surface corresponding to the first inclined surface, and the second slider is slidably connected to the third guide portion of the first slider through the third guide groove; wherein, the first slider can drive the second slider to slide along the first inclined surface by abutting against the first inclined surface and the second inclined surface.

[0012] Furthermore, the drive assembly also includes a first lock, which is disposed at the end of the drive shaft and located outside the tubular channel. When the first lock is locked, the drive shaft cannot rotate.

[0013] Furthermore, the locking assembly also includes a first limiting part, which is at least partially built into the tubular channel; when the first slider abuts against the first limiting part, the first locking part and the second locking part extend to their limit dimensions, and the second slider slides along the first inclined surface to its limit position via the second inclined surface.

[0014] Furthermore, the towing end has two opposing and spaced-apart sidewalls, each extending longitudinally to form a fourth guide groove, and each sidewall has a plurality of fourth through holes communicating with the fourth guide groove. The towing assembly includes a towing arm, a towing part, and at least one fixing pin that matches the fourth through hole. The towing arm is slidably connected to the towing end through the fourth guide groove, and the towing part is connected to the end of the towing arm away from the towing end. The towing arm has at least one fifth through hole that matches the fourth through hole, and the fixing pin passes through the fourth through hole and the fifth through hole to fix the towing arm relative to the fourth guide groove.

[0015] Furthermore, the towing unit is detachably connected to the towing arm, and the towing unit includes at least a first ball hook located on the top side of the towing arm. Furthermore, a second lock is provided at the end of the fixing pin, and when the second lock is engaged, the fixing pin cannot be detached.

[0016] Analysis reveals that this utility model discloses a towing device. During use, the towing device, through the driving and transmission components, causes the first and second locking parts of the locking assembly inside the pipeline to extend or retract synchronously relative to the mounting end, achieving self-locking and thus enabling rapid installation between the towing device and the receiver of the target vehicle. The height of the towing arm is adjusted by inserting and removing the fixing pin between it and the towing end. The first and second locks respectively prevent accidental activation of the driving component and the fixing pin, and also serve an anti-theft function. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. Wherein:

[0018] Figure 1 This is a schematic diagram of the structure of the towing device proposed in an embodiment of the present utility model;

[0019] Figure 2 A cross-sectional structural diagram of the towing device proposed in an embodiment of this utility model;

[0020] Figure 3 for Figure 2 A partially enlarged structural diagram of section B in the middle section;

[0021] Figure 4 This is a schematic diagram of the main body of the towing device proposed in an embodiment of the present utility model;

[0022] Figure 5 A schematic diagram of the structure of the towing arm and towing part in the towing device proposed in the embodiment of this utility model;

[0023] Figure 6 This is a schematic diagram of the locking mechanism in the towing device proposed in an embodiment of the present invention;

[0024] Figure 7 for Figure 6 A partially enlarged structural diagram of section C in the middle;

[0025] Figure 8 for Figure 6 A partially enlarged structural diagram of section D in the middle section;

[0026] Figure 9 This is a schematic diagram of the structure of the first slider and the second slider in the towing device proposed in an embodiment of the present invention.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Main body of the device; 101. Trailing end; 101a. Side wall; 101b. Fourth guide groove; 101c. Fourth through hole; 102. Mounting end; 102a. Tubular channel; 102b. First through hole; 102c. Second through hole; 102d. Third through hole; 102e. Sixth through hole; 102f. Seventh through hole;

[0029] 2. Trailer arm; 201. Fifth through hole; 202. First threaded hole; 203. First limiting surface;

[0030] 3. Trailing part; 301. First ball head hook; 302. Second ball head hook; 303. First external thread; 304. Second limiting surface;

[0031] 4. Fixing pin; 401. Second lock;

[0032] 5. Drive assembly; 501. Drive shaft; 501a. Bevel gear shaft segment; 502. First lock;

[0033] 6. Transmission assembly; 601. Drive shaft; 601a. ​​Second external thread; 602. Bevel gear; 603. Locking nut;

[0034] 701, First locking block; 701a, First locking part; 701b, First guide part; 702, Second locking block; 702a, Second locking part; 702b, Second guide part; 703, First slider; 703a, First guide groove; 703b, Second guide groove; 703c, Third guide part; 703d, First inclined surface; 703e, Second threaded hole; 704, Second slider; 704a, Third guide groove; 704b, Second inclined surface; 705, First limiting part; 706, Second limiting part. Detailed Implementation

[0035] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Various examples are provided by way of explanation of the present invention and not by way of limitation. In fact, those skilled in the art will recognize that modifications and variations can be made to the present invention without departing from the scope or spirit of the invention. For example, a feature shown or described as part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desirable that the present invention encompass such modifications and variations that fall within the scope of the appended claims and their equivalents.

[0036] In the description of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and do not require that this utility model be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. The terms "connected," "linked," and "set up" used in this utility model should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a direct connection or an indirect connection through intermediate components; a wired connection, a radio connection, or a wireless communication signal connection. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0037] The accompanying drawings illustrate one or more examples of the present invention. The detailed description uses numerals and letters to refer to features in the drawings. Similar or analogous reference numerals in the drawings and description have been used to refer to similar or analogous parts of the present invention. As used herein, the terms “first,” “second,” and “third,” etc., are used interchangeably to distinguish one component from another and are not intended to indicate the location or importance of individual components.

[0038] Example

[0039] like Figures 1 to 9 As shown, according to an embodiment of the present invention, a towing device is provided. The towing device includes a main body 1, a towing assembly, and a locking mechanism.

[0040] Preferably, such as Figures 1 to 4As shown, the main body 1 of the device can be formed by casting or welding, and includes two parts: a mounting end 102 and a towing end 101. The mounting end 102 is square tubular, and has a tubular channel 102a extending horizontally inside. The towing end 101 is located at one end of the extending direction of the tubular channel 102a. The left and right sides of the mounting end 102 are respectively provided with a first through hole 102b and a second through hole 102c communicating with the tubular channel 102a. The first through hole 102b and the second through hole 102c are respectively used to dock with the mounting holes on the receiver of the target vehicle. A third through hole 102d communicating with the tubular channel 102a is also provided on one side of the mounting end 102.

[0041] Preferably, such as Figures 1 to 8 As shown, a locking mechanism is provided on the mounting end 102. This locking mechanism includes a drive assembly 5, a transmission assembly 6, and a locking assembly connected in sequence. The drive assembly 5 includes a drive shaft 501 and a first toothed transmission structure disposed thereon. The transmission assembly 6 includes a transmission shaft 601 and a second toothed transmission structure disposed thereon. The first toothed transmission structure and the second toothed transmission structure mesh with each other. The locking assembly includes a first slider 703 and a mirror-symmetrical first locking block 701 and a second locking block 702. The first slider 703 is disposed inside the tubular channel 102a and is screwed to the end of the transmission shaft 601 away from the drive shaft 501 via a threaded structure. The first locking block 701 and the second locking block 702 are respectively connected to the first slider 703. The first locking block 701 is provided with a first locking part 701a that matches the first through hole 102b, and the second locking block 702 is provided with a second locking part 702a that matches the second through hole 102c. When the driving component 5 drives the locking component through the transmission component 6, the first slider 703 slides along the tubular channel 102a, and drives the first locking part 701a and the second locking part 702a to reciprocate synchronously inside and outside the mounting end 102 through the first through hole 102b and the second through hole 102c respectively, thereby realizing the snap-fit ​​between the mounting end 102 and the receiver of the target vehicle.

[0042] Specifically, such as Figures 1 to 8As shown, the meshing method between the first toothed transmission structure and the second toothed transmission structure adopts the form of bevel gear meshing transmission. The drive shaft 501 passes through the third through hole 102d into the interior of the tubular channel 102a, and a bevel gear shaft section 501a is provided on the shaft section of the drive shaft 501 located inside the pipeline. The transmission shaft 601 is located inside the pipeline passage, and its end near the drive shaft 501 is connected to a bevel gear 602 that matches the bevel gear shaft section 501a. The transmission shaft 601 meshes with the bevel gear shaft section 501a on the drive shaft 501 through the bevel gear 602. The drive shaft 601 has a second external thread 601a at one end away from the drive shaft 501. The first slider 703 has a second threaded hole 703e that matches the second external thread 601a. ​​The first slider 703 is screwed to the second external thread 601a of the drive shaft 601 through the second threaded hole 703e. A locking nut 603 is provided at the end of the drive shaft 601 at the second external thread 601a. ​​The locking nut 603 is used to prevent the first slider 703 from disengaging from the drive shaft 601. The first slider 703 has a first guide groove 703a and a second guide groove 703b that are mirror-symmetrical along the longitudinal direction and form an angle with the extension direction of the tubular channel 102a. The first locking block 701 has a first locking part 701a and a first guide part 701b that are pin-shaped and perpendicular to each other. The second locking block 702 has a second locking part 702a and a second guide part 702b that are pin-shaped and perpendicular to each other. The first locking block 701 and the second locking block 702 are mirror images of each other on the left and right sides of the drive shaft 601. The first locking block 701 is slidably connected to the first guide groove 703a on the first slider 703 via the first guide portion 701b, and the second locking block 702 is slidably connected to the second guide groove 703b on the first slider 703 via the second guide portion 702b. When the drive shaft 501 rotates, the bevel gear shaft section 501a drives the bevel gear 602 meshing with it, thereby driving the drive shaft 601 to rotate. During the rotation of the drive shaft 601, the second external thread 601a on the drive shaft 601 drives the first slider 703 screwed to it to slide along the tubular channel 102a. During the sliding process, the first guide groove 703a and the second guide groove 703b on the first slider 703 can synchronously drive the first locking portion 701a and the second locking portion 702a to reciprocate through the first through hole 102b and the second through hole 102c respectively, thereby realizing the self-locking function of the locking mechanism.

[0043] Preferably, such as Figures 1 to 9As shown, the locking assembly also includes a second slider 704. The first slider 703 has a third guide portion 703c extending in the same direction as the tubular channel 102a on one side, and the bottom of the third guide portion 703c has a first inclined surface 703d. A third guide groove 704a is formed on the second slider 704 at a position corresponding to the third guide portion 703c, and the bottom of the third guide groove 704a has a second inclined surface 704b that matches the first inclined surface 703d. The second slider 704 can be slidably connected to the third guide portion 703c on the first slider 703 through the third guide groove 704a, and when the first slider 703 and the second slider 704 are slidably connected, the first inclined surface 703d on the first slider 703 abuts against the second inclined surface 704b on the second slider 704. When the first slider 703 slides along the tubular channel 102a under the drive of the transmission component 6, the first inclined surface 703d and the second inclined surface 704b abut against each other, pushing the second slider 704 outward. When the second slider 704 is tightly fitted against the inner wall of the square opening of the receiver of the target vehicle, the first slider 703 stops moving. When the second slider 704 slides to different positions, it can effectively fit the square opening size of different target vehicle receivers, solving the compatibility problem of inconsistent square opening sizes for different vehicle models. The abutment of the first inclined surface 703d and the second inclined surface 704b can also prevent the locking component from disengaging due to severe vibration during towing.

[0044] Preferably, such as Figures 1 to 9 As shown, the locking assembly also includes a first limiting part 705 and a second limiting part 706. A sixth through hole 102e and a seventh through hole 102f are respectively provided at the top and bottom of the mounting end 102. Internal threads are provided on the sixth through hole 102e and the seventh through hole 102f. The first limiting part 705 and the second limiting part 706 are screwed into the sixth through hole 102e and the seventh through hole 102f respectively using limiting screws. When the first slider 703 abuts against the first limiting part 705 during sliding, the second slider 704 abuts against the second limiting part 706. At this time, the first locking part 701a and the second locking part 702a extend to their limit dimensions, and the second slider 704 slides along the first inclined surface 703b of the first slider 703 to its limit position via the second inclined surface 704b. The first limiting part 705 and the second limiting part 706 can prevent the locking assembly from failing to lock effectively due to excessive rotation of the drive assembly 5.

[0045] Preferably, such as Figures 1 to 7As shown, a first lock 502 is provided on the end of the drive shaft 501 away from the device body. The first lock 502 can be used to lock the drive assembly 5. When the first lock 502 is locked, external force drive is ineffective, the lock housing spins freely, the drive shaft 501 cannot rotate freely, and external force cannot be transmitted to the transmission shaft 601 through the drive shaft 501. This can effectively prevent the towing device from falling off during use due to accidental rotation of the drive shaft 501, and can also effectively prevent the towing device from being stolen when unattended.

[0046] Preferably, such as Figures 1 to 6 As shown, the towing end 101 has two sidewalls 101a that are oppositely arranged and extend longitudinally, forming a fourth guide groove 101b between the two sidewalls 101a. A towing arm 2 is slidably connected within the fourth guide groove 101b. Multiple fourth through holes 101c are correspondingly formed on the two sidewalls 101a along the longitudinal direction, and two fifth through holes 201 matching the fourth through holes 101c are formed on the towing arm 2 along the longitudinal direction. The height position of the towing arm 2 in the longitudinal direction can be adjusted by sliding along the fourth guide groove. After adjustment, two fixing pins 4 can be inserted through the fourth through holes 101c and the fifth through holes 201 to achieve relative fixation between the towing arm 2 and the towing end 101.

[0047] Preferably, such as Figure 1 and Figure 2 As shown, a second lock 401 is provided at the end of the fixing pin 4, which is used to restrict the insertion and removal of the fixing pin 4. When the second lock 401 is locked, the fixing pin 4 cannot be pulled out, which can prevent the fixing pin 4 from falling off due to vibration, and can also prevent the towing device from being stolen.

[0048] Preferably, such as Figures 1 to 6 As shown, the end of the towing arm 2 furthest from the towing end 101 has a first threaded hole 202 along its longitudinal direction, and the bottom of the first threaded hole 202 has a first limiting surface 203. The towing part 3 is provided with a first external thread 303 that matches the first threaded hole 202, and the towing part 3 has a second limiting surface 304 at a position corresponding to the first limiting surface 203. The towing part 3 can be screwed to the first threaded hole 202 of the towing arm 2 through the first external thread 303. When the towing part 3 is in towing operation, the first limiting surface 203 and the second limiting surface 304 abut against each other to protect the threaded structure and prevent the towing part 3 from falling off the towing arm 2.

[0049] Optionally, such as Figures 1 to 6As shown, the towing unit 3 includes a first ball-head hook 301 and a second ball-head hook 302. The first ball-head hook 301 and the second ball-head hook 302 are located at opposite ends of the towing unit 3 along its longitudinal direction. When the towing unit 3 is installed on the towing arm 2, the two ball-head hooks are located on the top and bottom sides of the towing arm 2, respectively. Using two ball-head hooks simultaneously for towing operations can improve safety and stability during towing. The first ball-head hook 301 and the second ball-head hook 302 can have different diameter specifications, and the two diameter specifications of ball-head hooks can be interchanged vertically.

[0050] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0051] Compared with the prior art, the towing device provided by this utility model, during use, can be driven and transmitted by the drive component 5 and the transmission component 6, causing the first locking part 701a and the second locking part 702a in the locking component inside the pipeline to extend or retract synchronously relative to the mounting end 102. At the same time, the second slider 704 provides lateral pipe wall adaptation support to the square opening of the target vehicle receiver to achieve stable self-locking, thereby completing the rapid installation between the towing device and the receiver of the target vehicle. The height of the towing arm 2 can be adjusted by inserting and removing the fixing pin 4 between it and the towing end 101. The first lock 502 and the second lock 401 can respectively prevent accidental activation of the drive component 5 and the fixing pin 4, and also serve as anti-theft measures.

[0052] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A towing device, characterized in that, include: The main body of the device includes a towing end and an installation end. The installation end has a tubular channel extending in a preset direction inside. A first through hole and a second through hole connecting the tubular channel are opened on opposite sides of the installation end. A towing assembly is disposed at the towing end; as well as A locking mechanism includes a drive assembly, a transmission assembly, and a locking assembly connected in sequence. The transmission assembly and the locking assembly are respectively disposed in the tubular channel. The locking assembly includes a first locking block and a second locking block that are mirror-symmetrical. The first locking block is provided with a first locking part that matches the first through hole, and the second locking block is provided with a second locking part that matches the second through hole. When the drive assembly drives the locking assembly through the transmission assembly, the first locking part and the second locking part reciprocate synchronously inside and outside the mounting end through the first through hole and the second through hole, respectively.

2. The towing device according to claim 1, characterized in that, The drive assembly includes a first toothed transmission structure disposed inside the tubular channel; The transmission assembly includes a transmission shaft disposed in the tubular channel and extending in the same direction as the tubular channel. The end of the transmission shaft near the first toothed transmission structure is provided with a second toothed transmission structure that meshes with the first toothed transmission structure. The end of the transmission shaft away from the second toothed transmission structure is provided with a threaded structure. The locking assembly further includes a first slider, which is screwed to the threaded structure and can reciprocate along the tubular channel via the drive shaft. The first slider has a first guide groove and a second guide groove. The first guide groove and the second guide groove are mirror symmetrical and form an angle along the extension direction of the tubular channel. The first locking block and the second locking block are also respectively provided with a first guide part and a second guide part. The first locking block is slidably connected to the first guide groove through the first guide part, and the second locking block is slidably connected to the second guide groove through the second guide part.

3. The towing device according to claim 2, characterized in that, A third through hole communicating with the tubular channel is provided on one side of the mounting end; The drive assembly further includes a drive shaft, the first toothed transmission structure is disposed on the drive shaft, and the drive shaft passes through the third through hole, so that the first toothed transmission structure is built into the tubular channel and can rotate within the tubular channel.

4. The towing device according to claim 2, characterized in that, The locking assembly also includes a second slider; The first slider is also provided with a third guide portion extending in the same direction as the tubular channel. The bottom of the third guide portion has a first inclined surface. The second slider is provided with a third guide groove corresponding to the third guide portion. The third guide groove has a second inclined surface corresponding to the first inclined surface. The second slider is slidably connected to the third guide portion of the first slider through the third guide groove. The first slider can be driven to slide along the first inclined surface by the first inclined surface abutting against the second inclined surface.

5. The towing device according to claim 3, characterized in that, The drive assembly further includes a first lock, which is disposed at the end of the drive shaft and located outside the tubular channel. When the first lock is locked, the drive shaft cannot be rotated.

6. The towing device according to claim 4, characterized in that, The locking assembly further includes a first limiting portion, which is at least partially built into the tubular channel; When the first slider abuts against the first limiting part, the first locking part and the second locking part extend to their limit size, and the second slider slides along the first inclined surface to its limit position via the second inclined surface.

7. The towing device according to claim 1, characterized in that, The towing end has two opposite and spaced-apart sidewalls, which extend longitudinally to form a fourth guide groove, and the two sidewalls are respectively provided with a plurality of fourth through holes communicating with the fourth guide groove along the longitudinal direction. The towing assembly includes a towing arm, a towing part, and at least one fixing pin that matches the fourth through hole. The towing arm is slidably connected to the towing end through the fourth guide groove, and the towing part is connected to the end of the towing arm away from the towing end. The trailer arm has at least one fifth through hole that matches the fourth through hole. The fixing pin passes through the fourth through hole and the fifth through hole to fix the trailer arm relative to the fourth guide groove.

8. The towing device according to claim 7, characterized in that, The towing part is detachably connected to the towing arm, and the towing part includes at least a first ball hook located on the top side of the towing arm.

9. The towing device according to claim 7, characterized in that, The end of the fixing pin is provided with a second lock, and when the second lock is locked, the fixing pin cannot be disassembled.

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