A trailer coupling with good mounting performance

Abstract

The present invention discloses a trailer coupler with good mounting performance, which solves the technical problem in the prior art that the trailer hook is prone to shaking when it is in an extended position or a retracted position. The trailer coupler of the present invention comprises a main body and a trailer hook, wherein the main body is fixed on a vehicle body, the main body comprises a driving shaft, a locking member, a transmission disc and a driven shaft, the driven shaft is connected to the trailer hook and rotates synchronously, the driving shaft drives the transmission disc to rotate idly, so that the locking member unlocks or locks the rotation of the driven shaft, when the locking member unlocks the rotation of the driven shaft, the driving shaft drives the driven shaft to rotate through the transmission disc, so that the trailer hook switches between the retracted position and the extended position, and when the trailer hook is in the retracted position or the extended position, the locking member locks the rotation of the driven shaft.

Description

[Technical field]

[0001] The invention relates to the technical field of trailer couplers, and in particular to a trailer coupler with good mounting performance. [Background technology]

[0002] With the continuous change of people's lifestyle, more and more people have more demands on the mounting performance of automobiles. The trailer coupler installed on the existing automobile includes a main body and a trailer hook. The main body is fixed on the body of the automobile. The main body is provided with a rotating shaft for driving the trailer hook to rotate synchronously. According to actual needs, the trailer hook is rotated to a retracted position under the vehicle body or rotated to an extended position outside the vehicle body for mounting. Since there is no locking mechanism to lock the rotating shaft to prevent the rotation when the trailer hook is in the extended position in the prior art, the trailer hook will shake when it is mounted, thereby reducing the mounting performance of the trailer coupler. [Summary of the invention]

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a trailer coupler with good mounting performance, which can lock the trailer hook when it is in a retracted position or an extended position to prevent the trailer hook from shaking, thereby improving the mounting performance of the trailer coupler.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A trailer coupler with good mounting performance comprises a main body and a trailer hook, wherein the main body is fixed on a vehicle body, the main body comprises a driving shaft, a locking member, a transmission disc and a driven shaft, the driven shaft is connected to the trailer hook and rotates synchronously, the driving shaft drives the transmission disc to rotate idly so that the locking member unlocks or locks the rotation of the driven shaft, when the locking member unlocks the rotation of the driven shaft, the driving shaft drives the driven shaft to rotate through the transmission disc so that the trailer hook switches between a folded position and an extended position, and when the trailer hook is in the folded position or the extended position, the locking member locks the rotation of the driven shaft.

[0006] Furthermore, the locking member is a rotatably mounted claw, the transmission disk is provided with a driving groove, and the driven shaft is provided with a locking groove. When the claw is inserted into the driving groove and the locking groove, the claw locks the rotation of the driven shaft. When the transmission disk is rotated to allow the claw to escape from the driving groove and the locking groove, the claw unlocks the rotation of the driven shaft.

[0007] Furthermore, the claw is provided with a torsion spring for driving the claw to reset, and after the claw is reset, the claw is clamped into the driving groove and the locking groove.

[0008] Furthermore, the locking groove is an arc-shaped groove, the claw is a fan-shaped plate, the arc surface of the fan-shaped plate matches the arc-shaped groove, the driving groove is a trapezoidal groove, and the opening of the trapezoidal groove gradually increases radially outward; or, the arc surface of the fan-shaped plate is provided with teeth, and the outer peripheral side of the transmission plate is provided with tooth grooves meshing with the teeth, and the tooth grooves form the driving groove.

[0009] Furthermore, the transmission disc is provided with a transmission boss, and the driven shaft is provided with a coaxially arranged arc-shaped transmission groove, the transmission boss is inserted into the arc-shaped transmission groove, and when the transmission disc drives the transmission boss to rotate from the middle of the arc-shaped transmission groove to the end of the arc-shaped transmission groove, the claw disengages from the drive groove and the lock groove.

[0010] Furthermore, a plurality of the driving grooves are evenly spaced circumferentially on the outer circumference of the transmission plate, a plurality of the locking grooves are provided on the driven shaft, and a plurality of the claws are respectively engaged in the plurality of the driving grooves and the plurality of the locking grooves to lock the rotation of the driven shaft.

[0011] Furthermore, the main body also includes a fixed sleeve fixed relative to the vehicle body, the fixed sleeve is sleeved on the outside of the driven shaft, and the locking member is rotatably mounted on the end surface of the fixed sleeve.

[0012] Furthermore, one of the inner circumference of the fixed sleeve and the outer circumference of the driven shaft is provided with a limiting groove, and the other is provided with a limiting boss inserted into the limiting groove, and the limiting boss moves between the two ends of the limiting groove.

[0013] Furthermore, the main body includes a shell and a motor assembly arranged in the shell, the driving shaft, the transmission plate and the locking piece are located in the shell, the motor assembly drives the driving shaft to rotate, one end of the driven shaft is located in the shell, and the other end passes through the outside of the shell and is connected to the trailer hook.

[0014] Furthermore, the main body includes a shell covering the outside of the transmission plate and the locking member, one end of the driven shaft is located in the shell, and the other end passes through the shell to be connected to the trailer hook, and one end of the driving shaft is located in the shell, and the other end passes through the shell.

[0015] Beneficial effects of the present invention:

[0016] In the present invention, when the driving shaft drives the transmission disc to rotate idly so that the locking member unlocks or locks the rotation of the driven shaft, the transmission disc is in a rotating state while the driven shaft remains in a non-rotating state. When the trailer coupler is used, the driving shaft first drives the transmission disc to rotate idly, so that the locking member unlocks the rotation of the driven shaft, thereby allowing the driven shaft to rotate, and then the driving shaft continues to rotate and drives the driven shaft to rotate through the transmission disc. The rotation of the driven shaft can switch the trailer hook from the retracted position to the deployed position, and then the driving shaft drives the transmission disc to rotate idly in the opposite direction to drive the locking member to lock the rotation of the driven shaft. During the process of the driving shaft driving the transmission disc to rotate idly in the opposite direction, the driven shaft remains stationary to keep the trailer hook in the deployed position. After the locking member locks the rotation of the driven shaft, the trailer hook can be locked in the deployed position, thereby avoiding shaking of the trailer hook when mounted, thereby improving the mounting performance; similarly, when switching the trailer hook from the deployed position to the retracted position, the unlocking principle and the locking principle are the same, only the rotation direction of the driving shaft is different. Therefore, the trailer hook can also be locked in the retracted position through the technical solution of the present invention, thereby avoiding shaking of the trailer hook when it is in the retracted position, thereby improving the mounting performance of the trailer coupler. The locking member is a rotatably mounted claw, a driving groove is provided on the transmission disk, and a locking groove is provided on the driven shaft. When the claw is inserted into the driving groove and the locking groove, the claw locks the rotation of the driven shaft. When the transmission disk rotates to make the claw escape from the driving groove and the locking groove, the claw unlocks the rotation of the driven shaft. With such a design, when the transmission disk is idling, the claw can be pushed out of the driving groove and the locking groove by the side wall of the driving groove, thereby realizing the claw unlocking the rotation of the driven shaft. When the transmission disk is idling in the reverse direction, the claw is reset and inserted into the driving groove and the locking groove to lock the rotation of the driven shaft and prevent the driven shaft from rotating. The claw is provided with a torsion spring for driving the claw to reset. After the claw is reset, the claw is inserted into the driving groove and the locking groove. With such a design, the claw can be rotated by the restoring force of the torsion spring to achieve automatic reset to lock the rotation of the driven shaft. The structure is simple and easy to assemble.

[0017] The locking groove is an arc groove, the claw is a fan-shaped plate, the arc surface of the fan-shaped plate matches the arc groove, the driving groove is a trapezoidal groove, and the opening of the trapezoidal groove gradually increases radially outward; or, the arc surface of the fan-shaped plate is provided with teeth, and the outer peripheral side of the transmission plate is provided with a tooth groove meshing with the teeth, and the tooth groove forms a driving groove. Such a design can not only enable the transmission plate to smoothly drive the claw to rotate and escape from the locking groove, but also improve the locking effect of the claw and the locking groove in the locked state.

[0018] A transmission boss is provided on the transmission disc, and a coaxially arranged arc-shaped transmission groove is provided on the driven shaft. The transmission boss is inserted into the arc-shaped transmission groove. When the transmission disc drives the transmission boss to rotate from the middle of the arc-shaped transmission groove to the end of the arc-shaped transmission groove, the claw escapes from the driving groove and the locking groove. With such a design, when the transmission disc drives the transmission boss to rotate from the middle of the arc-shaped transmission groove to the end of the arc-shaped transmission groove, the transmission disc can be idle, and the driven shaft does not rotate at this time; when the transmission boss moves to the end of the arc-shaped transmission groove, the claw unlocks the rotation of the driven shaft, and the driven shaft can rotate at this time, thereby continuing to drive the transmission disc to rotate, so that the transmission boss can drive the driven shaft to rotate, thereby realizing the towing hook switching between the retracted position and the unfolded position; when the transmission boss moves from the end of the arc-shaped transmission groove to the middle of the arc-shaped transmission groove, the transmission disc is idle, and the driven shaft does not rotate. When the transmission boss moves to the middle of the arc-shaped transmission groove, the claw locks the rotation of the driven shaft.

[0019] The outer circumference of the transmission plate is evenly spaced with a plurality of driving grooves, and the driven shaft is provided with a plurality of locking grooves. The plurality of claws are respectively inserted into the plurality of driving grooves and the plurality of locking grooves to lock the rotation of the driven shaft. By providing a plurality of claws and a plurality of locking grooves for locking cooperation one by one, the locking effect of the driven shaft can be improved, thereby further preventing the shaking of the trailer hook caused by the rotation of the driven shaft.

[0020] The main body also includes a fixed sleeve fixed relative to the vehicle body, the fixed sleeve is sleeved on the outside of the driven shaft, and the locking piece is rotatably mounted on the end surface of the fixed sleeve. Such a design can not only radially position the driven shaft through the fixed sleeve to ensure the coaxiality of the driven shaft and the transmission plate, but also provide a carrier for the installation of the locking piece, thereby simplifying the structure of the main body.

[0021] One of the inner circumference of the fixed sleeve and the outer circumference of the driven shaft is provided with a limiting groove, and the other is provided with a limiting boss inserted into the limiting groove, and the limiting boss moves between the two ends of the limiting groove. With such a design, the rotation angle of the driven shaft can be limited to ensure the initial position and the end position of the driven shaft, thereby ensuring the locking effect of the folded position and the unfolded position of the trailer hook.

[0022] The main body includes a housing and a motor assembly disposed in the housing. The driving shaft, the transmission plate and the locking member are located in the housing. The motor assembly drives the driving shaft to rotate. One end of the driven shaft is located in the housing, and the other end passes through the housing and is connected to the trailer hook. By driving the driving shaft to rotate through the motor assembly, the user experience can be improved.

[0023] The main body includes a housing that covers the transmission disc and the outer side of the locking member. One end of the driven shaft is located in the housing, and the other end passes through the housing to connect with the trailer hook. One end of the driving shaft is located in the housing, and the other end passes through the housing. With this design, the user can drive the driving shaft to rotate by turning the end of the driving shaft extending out of the housing with a wrench or by hand, without the need to set up a motor assembly, thereby reducing the manufacturing cost of the product and avoiding the phenomenon that the product cannot be used normally due to electrical failure.

[0024] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and drawings.

Brief Description of the Drawings

[0025] The present invention will be further described below in conjunction with the accompanying drawings:

[0026] Figure 1 It is an exploded structural diagram of a trailer connector in Embodiment 1 of the present invention;

[0027] Figure 2 A cross-sectional view of a trailer coupling installed on a vehicle body in Embodiment 1 of the present invention;

[0028] Figure 3 It is a schematic structural diagram of a driving disc and a driven shaft in Embodiment 1 of the present invention;

[0029] Figure 4 This is a state diagram of the locking member in the first embodiment of the present invention when it is locked in the driving groove;

[0030] Figure 5 A state diagram of the locking member when it is locked into the locking groove in the first embodiment of the present invention;

[0031] Figure 6 It is a cross-sectional view of the locking member in the first embodiment of the present invention when it is inserted into the driving groove and the locking groove;

[0032] Figure 7 A state diagram of the locking member in the first embodiment of the present invention when it is out of the driving groove and the locking groove;

[0033] Figure 8 It is a cross-sectional view of the cooperation between the fixed sleeve and the driven shaft in the first embodiment of the present invention;

[0034] Fig. 9 This is a schematic diagram of the state when the locking member in the second embodiment of the present invention locks the rotation of the driven shaft;

[0035] Fig.10 This is an exploded structural diagram of a trailer connector in Embodiment 3 of the present invention.

[0036] Reference numerals:

[0037] 100, trailer hook; 200, driving shaft; 300, locking piece; 310, torsion spring; 320, teeth; 400, transmission plate; 410, driving groove; 420, transmission boss; 500, driven shaft; 510, locking groove; 520, arc-shaped transmission groove; 530, limiting boss; 600, connecting plate; 700, housing; 800, fixed bushing; 810, latch; 820, limiting groove; 900, cover plate; 1000, motor assembly. [Specific implementation method]

[0038] The present invention provides a trailer coupler with good mounting performance, comprising a main body and a trailer hook, wherein the main body is fixed on a vehicle body, the main body comprises a driving shaft, a locking member, a transmission disc and a driven shaft, the driven shaft is connected to the trailer hook and rotates synchronously, the driving shaft drives the transmission disc to rotate idly, so that the locking member unlocks or locks the rotation of the driven shaft, when the locking member unlocks the rotation of the driven shaft, the driving shaft drives the driven shaft to rotate through the transmission disc, so that the trailer hook switches between a folded position and an extended position, and when the trailer hook is in the folded position or the extended position, the locking member locks the rotation of the driven shaft.

[0039] In the present invention, when the driving shaft drives the transmission disc to rotate idly so that the locking member unlocks or locks the rotation of the driven shaft, the transmission disc is in a rotating state while the driven shaft remains in a non-rotating state. When the trailer coupler is used, the driving shaft first drives the transmission disc to rotate idly, so that the locking member unlocks the rotation of the driven shaft, thereby allowing the driven shaft to rotate, and then the driving shaft continues to rotate and drives the driven shaft to rotate through the transmission disc. The rotation of the driven shaft can switch the trailer hook from the retracted position to the deployed position, and then the driving shaft drives the transmission disc to rotate idly in the opposite direction to drive the locking member to lock the rotation of the driven shaft. During the process of the driving shaft driving the transmission disc to rotate idly in the opposite direction, the driven shaft remains stationary to keep the trailer hook in the deployed position. After the locking member locks the rotation of the driven shaft, the trailer hook can be locked in the deployed position, thereby avoiding shaking of the trailer hook when mounted, thereby improving the mounting performance; similarly, when switching the trailer hook from the deployed position to the retracted position, the unlocking principle and the locking principle are the same, only the rotation direction of the driving shaft is different. Therefore, the trailer hook can also be locked in the retracted position through the technical solution of the present invention, thereby avoiding shaking of the trailer hook when it is in the retracted position, thereby improving the mounting performance of the trailer coupler. The technical solutions of the embodiments of the present invention are explained and described below in conjunction with the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

[0040] Embodiment 1

[0041] Reference Figures 1 to 8As shown, the trailer coupler in this embodiment includes a main body and a trailer hook 100. The main body is fixed on the anti-collision beam of the vehicle body. The main body includes a driving shaft 200, a locking member 300, a transmission disc 400 and a driven shaft 500. The driven shaft 500 is connected to the trailer hook 100 and rotates synchronously. The driving shaft 200 drives the transmission disc 400 to rotate idly, so that the locking member 300 locks or unlocks the rotation of the driven shaft 500. When the locking member 300 unlocks the rotation of the driven shaft 500, the driving shaft 200 drives the driven shaft 500 to rotate through the transmission disc 400, so that the trailer hook 100 switches between the retracted position and the deployed position. When the trailer hook 100 is in the retracted position or the deployed position, the locking member 300 locks the rotation of the driven shaft 500.

[0042] In this embodiment, when the driving shaft 200 drives the transmission disc 400 to rotate idly so that the locking member 300 locks or unlocks the rotation of the driven shaft 500, the transmission disc 400 is in a rotating state while the driven shaft 500 remains in a non-rotating state. When using the trailer coupling, the driving shaft 200 first drives the transmission disc 400 to rotate idly so that the locking member 300 unlocks the rotation of the driven shaft 500, thereby allowing the driven shaft 500 to rotate. Then the driving shaft 200 continues to rotate and drives the driven shaft 500 to rotate through the transmission disc 400. The rotation of the driven shaft 500 can switch the trailer hook 100 from the retracted position to the deployed position. Subsequently, the driving shaft 200 drives the transmission disc 400 to rotate idly in the reverse direction so as to drive the locking member 300 to lock the rotation of the driven shaft 500. During the process of the driving shaft 200 driving the transmission disc 400 to rotate idly in the reverse direction, the driven shaft 500 remains stationary to keep the trailer hook 100 in a state of being unfolded. When the hook 100 is in the deployed position, after the locking member 300 locks the rotation of the driven shaft 500, the trailer hook 100 can be locked in the deployed position, thereby avoiding the shaking of the trailer hook 100 when mounting, thereby improving the mounting performance; similarly, when the trailer hook 100 is switched from the deployed position to the retracted position, the unlocking principle and the locking principle are the same, only the rotation direction of the driving shaft 200 is different. Therefore, the trailer hook 100 can also be locked in the retracted position through the technical solution of this embodiment, thereby avoiding the shaking of the trailer hook 100 when it is in the retracted position, thereby improving the mounting performance of the trailer connector.

[0043] Specifically, the main body in this embodiment also includes a connecting plate 600 fixedly connected to the anti-collision beam, a shell 700 buckled on one side of the connecting plate 600, one end of the fixed sleeve 800 is located in the shell 700, and the other end is set through the connecting plate 600, the fixed sleeve 800 and the shell 700 are fixed to the connecting plate 600 by screws, and the fixed sleeve 800 is sleeved on the outside of the driven shaft 500 to radially position the driven shaft 500, thereby ensuring the coaxiality of the driven shaft 500 and the transmission plate 400; one end of the driven shaft 500 is located in the shell 700, and the other end passes through the fixed sleeve 80 0 is connected to the trailer hook 100, the portion where the driven shaft 500 is connected to the trailer hook 100 is a non-circular surface that matches the non-circular hole on the trailer hook 100, so that the driven shaft 500 drives the trailer hook 100 to rotate synchronously, a cover plate 900 is also fixed in the housing 700, the transmission disc 400 is movably connected to the cover plate 900 through a plane bearing, and the driving shaft 200 is transmission-connected to the transmission disc 400 after passing through the cover plate 900 and the plane bearing, that is, the portion where the driving shaft 200 matches the non-circular hole on the transmission disc 400 is a non-circular surface. With this design, the driving shaft 200 can drive the transmission disc 400 to rotate synchronously.

[0044] like Figures 3 to 7As shown, the locking member 300 in this embodiment is a rotatably mounted claw, which is a sector plate, and a latch 810 is provided on the end surface of the fixed sleeve 800 located in the housing 700, on which the claw is rotatably mounted, and a torsion spring 310 is sleeved on the claw, one end of which is fixed on the fixed sleeve 800 or the cover plate 900, and the other end is fixed on the protrusion on the claw, so that the claw can be driven to rotate and reset by the restoring force of the torsion spring 310. In addition, a driving groove 410 is provided on the outer peripheral side of the transmission disk 400 of this embodiment, and the driving groove 410 is a trapezoidal groove, and the opening of the trapezoidal groove gradually increases radially outward, and one end of the driven shaft 500 close to the transmission disk 400 extends radially outward to form a ring, and a locking groove 510 is provided on the outer peripheral side of the ring, and the locking groove 510 is an arc groove, which matches the arc surface of the sector plate. When the driving shaft 200 drives the transmission disk 400 to idle, the side wall of the driving groove 410 can push the claw to rotate out of the driving groove 410 and the locking groove 510, thereby realizing that the claw unlocks the rotation of the driven shaft 500, so that the driven shaft 500 can rotate. When the driving shaft 200 drives the transmission disk 400 to idle in the reverse direction, the claw automatically resets and is clamped into the driving groove 410 and the locking groove 510 under the restoring force of the torsion spring 310 to lock the rotation of the driven shaft 500 and prevent the driven shaft 500 from rotating. In addition, when the driven shaft 500 is locked, no force is transmitted between the claw and the driving groove 410 , thereby achieving the separation of the driven shaft 500 and the transmission disk 400 in the locked state, thereby preventing the driving shaft 200 from being in a stressed state for a long time, thereby extending the service life of the driving shaft 200, especially when the driving shaft 200 is driven to rotate by the motor assembly, such a design can also extend the service life of the motor assembly; in addition, the driving groove 410 in this embodiment is designed as a trapezoidal groove, which can enable the transmission disk 400 to smoothly drive the claw to rotate and escape from the locking groove 510, and the locking groove 510 is designed to match the arc surface of the fan-shaped plate, which can improve the locking effect of the claw and the locking groove 510 in the locked state.

[0045] It can be understood that in other embodiments of the present invention, an inner side wall of the housing is provided with an annular mounting plate surrounding the outer side of the driven shaft, and the locking member is rotatably mounted on the mounting plate.

[0046] When the driving shaft 200 drives the driving plate 400 to rotate, so that the driving plate 400 drives the driving boss 420 to rotate from the middle of the arc transmission groove 520 to the end of the arc transmission groove 520, the claw disengages from the driving groove 410 and the locking groove 510, and the claw unlocks the rotation of the driven shaft 500. In the process of the driving boss 420 rotating from the middle of the arc transmission groove 520 to the end of the arc transmission groove 520, since the driving boss 420 slides in the arc transmission groove 520, it does not The driven shaft 500 is applied with a torque, so that the transmission disc 400 rotates while the driven shaft 500 does not move, thereby realizing the idling of the transmission disc 400; after the claw unlocks the rotation of the driven shaft 500, when the transmission disc 400 continues to be driven to rotate, the transmission boss 420 drives the driven shaft 500 to rotate by driving the groove wall of the arc-shaped transmission groove 520, thereby realizing the switching of the trailer hook 100 between the folded position and the deployed position; subsequently, the driving shaft 200 drives the transmission disc 400 to rotate in the opposite direction, so that the transmission boss 420 moves from the end of the arc-shaped transmission groove to the middle of the arc-shaped transmission groove. At this time, the driven shaft 500 does not rotate to keep the trailer hook 100 in the folded position or the deployed position. When the transmission boss 420 moves to the middle of the arc-shaped transmission groove 520, the claw is reset and clamped into the driving groove 410 and the locking groove 510 to lock the rotation of the driven shaft 500.

[0047] In order to enable the transmission disk 400 to drive the driven shaft 500 to rotate smoothly, in this embodiment, two transmission bosses 420 are symmetrically provided on the center of the disk surface of the transmission disk 400, and two arc-shaped transmission grooves 520 are correspondingly provided on the driven shaft 500. This design can ensure the smooth rotation of the driven shaft 500 and the size of the claws, thereby ensuring the locking effect of the driven shaft 500.

[0048] In order to improve the locking effect of the driven shaft 500 and further prevent the shaking of the trailer hook 100 caused by the rotation of the driven shaft 500, a plurality of driving grooves 410 are evenly spaced at the outer circumferential side of the transmission plate 400 in this embodiment, and a plurality of locking grooves 510 are provided on the driven shaft 500. A plurality of claws are respectively inserted into the plurality of driving grooves 410 and the plurality of locking grooves 510 to lock the rotation of the driven shaft 500, thereby improving the locking effect of the driven shaft 500 and further preventing the shaking of the trailer hook 100 caused by the rotation of the driven shaft 500. In this embodiment, it is preferred that the number of claws, the number of driving grooves 410 and the number of locking grooves 510 are equal, and the number of driving grooves 410, the number of locking grooves 510 and the number of claws are all 4. In this design, the locking effect of the driven shaft 500 is improved by setting 4 claws and 4 locking grooves 510 to lock one by one.

[0049] It can be understood that in other embodiments of the present invention, the number of drive slots and lock slots can be more than the number of claws, and the claws are inserted into some of the lock slots and drive slots. For example, the number of claws is 3, and the number of drive slots and lock slots is 6, and the three claws are inserted into three of the lock slots and three of the drive slots. Such a design can also improve the locking effect of the driven shaft.

[0050] It can be understood that in other embodiments of the present invention, the arc-shaped transmission groove can also be arranged on the disk surface of the transmission disk, and the transmission boss is arranged on the driven shaft, and the transmission boss is inserted into the arc-shaped transmission groove. When the locking member locks the rotation of the driven shaft, the transmission boss is located in the middle of the arc-shaped transmission groove. When the locking member unlocks the rotation of the driven shaft, the transmission boss rests on the end of the arc-shaped transmission groove.

[0051] In order to better understand the technical solution, the operating principle of the trailer coupler in this embodiment will be described below:

[0052] like Figure 4 As shown, the locking member 300 locks the rotation of the driven shaft 500. At this time, the trailer hook 100 is in the retracted position, and the driving shaft 200 drives the transmission plate 400 to rotate clockwise. In the process of the transmission boss 420 moving from the middle of the arc-shaped transmission groove 520 to the right end of the arc-shaped transmission groove 520, the groove wall of the driving groove 410 pushes the claw to rotate toward the outside of the locking groove 510. When the transmission boss 420 moves to the right end of the arc-shaped transmission groove 520, the claw escapes from the driving groove 410 and the outside of the locking groove 510 (as shown in FIG. Figure 5As shown), the rotation of the driven shaft 500 is unlocked, and the driving shaft 200 continues to drive the transmission plate 400 to rotate clockwise. At this time, the driven shaft 500 drives the trailer hook 100 to rotate synchronously under the drive of the transmission boss 420 until the trailer hook 100 rotates to the unfolded position. Subsequently, the driving shaft 200 drives the transmission plate 400 to rotate idly in the reverse direction, that is, to rotate idly counterclockwise, until the transmission boss 420 moves from the right end of the arc-shaped transmission groove 520 to the arc-shaped transmission groove 520. During the process of moving to the middle of the arc-shaped transmission groove 520, the driven shaft 500 does not rotate to keep the trailer hook 100 in the deployed position. When the transmission boss 420 moves to the middle of the arc-shaped transmission groove 520, the driving groove 410 corresponds to the locking groove 510, and the claw is reset under the restoring force of the torsion spring 310 and is clamped into the driving groove 410 and the locking groove 510, thereby locking the rotation of the driven shaft 500, that is, preventing the driven shaft 500 from rotating, thereby preventing the trailer hook 100 from shaking in the deployed position.

[0053] Similarly, when it is necessary to switch the trailer hook 100 from the deployed position to the retracted position, the driving shaft 200 drives the transmission plate 400 to rotate counterclockwise. In the process of the transmission boss 420 moving from the middle of the arc-shaped transmission groove 520 to the left end of the arc-shaped transmission groove 520, the groove wall of the driving groove 410 pushes the claw to rotate toward the outside of the locking groove 510. When the transmission boss 420 moves to the end of the arc-shaped transmission groove 520, the claw disengages from the driving groove 410 and the locking groove 510, thereby unlocking the rotation of the driven shaft 500, and the driving shaft 200 continues to drive the transmission plate 400 to rotate counterclockwise. At this time, the driven shaft 500 drives the trailer hook 100 to rotate synchronously under the drive of the transmission boss 420 until The trailer hook 100 rotates to the retracted position, and then the driving shaft 200 drives the transmission plate 400 to rotate in the opposite direction, that is, to rotate in a clockwise direction. During the process of the transmission boss 420 moving from the left end of the arc-shaped transmission groove 520 to the middle of the arc-shaped transmission groove 520, the driven shaft 500 does not rotate to keep the trailer hook 100 in the retracted position. When the transmission boss 420 moves to the middle of the arc-shaped transmission groove 520, the driving groove 410 corresponds to the locking groove 510, and the claw is reset under the restoring force of the torsion spring 310 and is clamped in the driving groove 410 and the locking groove 510, thereby locking the rotation of the driven shaft 500, that is, preventing the driven shaft 500 from rotating, thereby avoiding the shaking of the trailer hook 100 in the retracted position.

[0054] In order to ensure that the driving groove 410 and the locking groove 510 can correspond to each other one by one after the transmission plate 400 rotates in the reverse direction so that the claws can be locked into the driving groove 410 and the locking groove 510, it is necessary to limit the rotation angle required by the driven shaft 500 when the trailer hook 100 switches between the folded position and the unfolded position. In order to ensure the accuracy of the above rotation angle limitation, as shown in FIG. Figure 8As shown, in this embodiment, an arc-shaped limiting groove 820 is provided on the inner circumference of the fixed sleeve 800, and a limiting boss 530 is provided on the outer circumference of the driven shaft 500 that cooperates with the fixed sleeve 800. The limiting boss 530 moves between the two ends of the limiting groove 820, thereby limiting the rotation angle of the driven shaft 500 by limiting the rotation angle of the limiting boss 530, that is, ensuring the initial position and the end position of the driven shaft 500, and further ensuring the locking effect of the folded position and the unfolded position of the trailer hook 100.

[0055] It is understandable that, in other embodiments of the present invention, the arc-shaped limiting groove may also be provided on the outer peripheral side of the driven shaft, and the limiting boss may be provided on the inner peripheral side of the fixed sleeve.

[0056] Finally, in order to improve the user experience of the product, the housing 700 in this embodiment is further provided with a motor assembly 1000, the driving shaft 200 is located in the housing 700 and connected to the output shaft sleeve of the motor assembly 1000, and the motor assembly 1000 drives the driving shaft 200 to rotate so that the trailer hook 100 switches between the folded position and the deployed position. During the whole process, the user does not need to manually drive the driving shaft 200 to rotate, thereby improving the user experience of the product.

[0057] Embodiment 2

[0058] like Fig. 9 As shown, compared with the first embodiment, the difference of this embodiment is that teeth 320 are provided on the arc surface of the claw, and the outer peripheral side of the transmission plate 400 is provided with tooth grooves meshing with the teeth. Preferably, the transmission plate 400 is a gear, and the tooth groove forms a driving groove 410. Such a design can also realize the claw being pushed out of the outside of the locking groove 510 through the groove wall of the driving groove 410.

[0059] Embodiment 3

[0060] like Fig.10 As shown, compared with the first and second embodiments, the difference of this embodiment is that the fixed sleeve 800 and the connecting plate 600 in this embodiment are integrally processed to form a connecting fixing plate, and the connecting fixing plate is fixed on the anti-collision beam.

[0061] Embodiment 4

[0062] Compared with the first to third embodiments, the difference of this embodiment is that no motor assembly is arranged in the shell 700 in this embodiment. In this case, one end of the driving shaft 200 extends out of the shell 700. The user can drive the driving shaft 200 to rotate by using a wrench or by hand to rotate the end of the driving shaft 200 extending out of the shell 700, so that the trailer hook 100 can switch between the folded position and the deployed position, thereby reducing the manufacturing cost of the product and avoiding the phenomenon that the product cannot be used normally due to electrical failure.

[0063] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.

Claims

1. A trailer coupler with good mounting performance, comprising a main body and a trailer hook, wherein the main body is fixed on a vehicle body, and characterized in that: The main body comprises a driving shaft, a locking member, a transmission disc and a driven shaft, wherein the driven shaft is connected to the trailer hook and rotates synchronously, the driving shaft drives the transmission disc to rotate idly so that the locking member unlocks or locks the rotation of the driven shaft, when the locking member unlocks the rotation of the driven shaft, the driving shaft drives the driven shaft to rotate through the transmission disc so that the trailer hook switches between the folded position and the unfolded position, when the trailer hook is in the folded position or the unfolded position, the locking member locks the rotation of the driven shaft, the locking member is a rotatably mounted claw, a driving groove is provided on the transmission disc, a locking groove is provided on the driven shaft, when the claw is clamped into the driving groove and the locking groove, the claw locks the rotation of the driven shaft, when the transmission disc rotates to make the claw escape from the driving groove and the locking groove, the claw unlocks the rotation of the driven shaft, the main body further comprises a fixed sleeve fixed relative to the vehicle body, the fixed sleeve is sleeved on the outer side of the driven shaft, and the locking member is rotatably mounted on the end surface of the fixed sleeve.

2. A trailer coupling with good mounting performance as claimed in claim 1, characterized in that: The clamping claw is provided with a torsion spring for driving the clamping claw to reset. After the clamping claw is reset, the clamping claw is clamped into the driving groove and the locking groove.

3. A trailer coupling with good mounting performance as claimed in claim 1, characterized in that: The locking groove is an arc-shaped groove, the claw is a fan-shaped plate, the arc surface of the fan-shaped plate matches the arc-shaped groove, the driving groove is a trapezoidal groove, and the opening of the trapezoidal groove gradually increases radially outward; or, the arc surface of the fan-shaped plate is provided with teeth, and the outer peripheral side of the transmission plate is provided with tooth grooves meshing with the teeth, and the tooth grooves form the driving groove.

4. A trailer coupling with good mounting performance as claimed in claim 2, characterized in that: The transmission disc is provided with a transmission boss, and the driven shaft is provided with a coaxially arranged arc-shaped transmission groove, the transmission boss is inserted into the arc-shaped transmission groove, and when the transmission disc drives the transmission boss to rotate from the middle of the arc-shaped transmission groove to the end of the arc-shaped transmission groove, the claw disengages from the driving groove and the locking groove.

5. A trailer coupling with good mounting performance as claimed in claim 2, characterized in that: A plurality of driving grooves are evenly spaced circumferentially arranged on the outer circumference of the transmission plate, a plurality of locking grooves are arranged on the driven shaft, and a plurality of claws are respectively inserted into the plurality of driving grooves and the plurality of locking grooves to lock the rotation of the driven shaft.

6. A trailer coupling with good mounting performance as claimed in claim 1, characterized in that: One of the inner circumference of the fixed sleeve and the outer circumference of the driven shaft is provided with a limiting groove, and the other is provided with a limiting boss inserted into the limiting groove, and the limiting boss moves between the two ends of the limiting groove.

7. A trailer coupling with good mounting performance as claimed in any one of claims 1 to 6, characterized in that: The main body includes a shell and a motor assembly arranged in the shell, the driving shaft, the transmission plate and the locking piece are located in the shell, the motor assembly drives the driving shaft to rotate, one end of the driven shaft is located in the shell, and the other end passes through the shell and is connected to the trailer hook.

8. A trailer coupling with good mounting performance as claimed in any one of claims 1 to 6, characterized in that: The main body includes a shell covering the outside of the transmission plate and the locking member, one end of the driven shaft is located in the shell, and the other end passes through the shell to be connected to the trailer hook, and one end of the driving shaft is located in the shell, and the other end passes through the shell.

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