CN216886118U - Trailer coupler with good mounting performance - Google Patents

Abstract

The utility model discloses a trailer coupler with good hanging performance, which solves the technical problem that the trailer coupler is easy to shake when in an unfolding position or a folding position in the prior art, and comprises a main body and the trailer coupler, the main body is fixed on the vehicle body and comprises a driving shaft, a locking piece, a transmission disc and a driven shaft, the driven shaft is connected with the trailer hook and synchronously rotates, the driving shaft drives the transmission disc to idle, so that the locking part unlocks or locks the rotation of the driven shaft, when the locking part 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 is switched between a furled position and an unfolded position, and when the trailer hook is in the furled position or the unfolded position, the locking piece locks the rotation of the driven shaft.

Description

Trailer coupler with good mounting performance

[ technical field ] A

The utility model relates to the technical field of trailer couplers, in particular to a trailer coupler with good mounting performance.

[ background ] A method for producing a semiconductor device

Along with the constantly change of people's life style, more and more people have had more demands to the carry performance of car, the trailer coupler of installing additional on the current car includes main part and towing hook, the main part is fixed on the automobile body of car, be equipped with the pivot that is used for driving the synchronous pivoted of towing hook in the main part, rotate the towing hook to be in below the automobile body and draw in the position or rotate to be in the expansion position beyond the automobile body and carry out the carry according to actual need, because among the prior art when the towing hook is in the expansion position, no locking mechanical system locks the pivot in order to prevent its rotation, consequently can take place to rock when the towing hook carries, the carry performance of trailer coupler has been reduced from this.

[ Utility model ] A method for manufacturing a semiconductor device

The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a trailer coupler with good mounting performance, which can be locked when the trailer coupler is at a folding position or an unfolding position so as to prevent the trailer coupler from shaking, thereby improving the mounting performance of the trailer coupler.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the utility model provides a trailer coupling that carry performance is good, includes main part and trailer hook, the main part is fixed on the automobile body, the main part includes driving shaft, retaining member, driving disk and driven shaft, the driven shaft with trailer hook connects and rotates in step, the driving shaft drive the driving disk idle running, so that retaining member unblock or locking the rotation of driven shaft, the retaining member unblock during the rotation of driven shaft, the driving shaft passes through the driving disk drives the driven shaft rotates, so that trailer hook switches between draw in the position and the expansion position, when trailer hook is in draw in the position or the expansion position, the retaining member locks the rotation of driven shaft.

Further, the retaining member is the jack catch that rotates the installation, be equipped with the driving groove on the driving disc, be equipped with the locked groove on the driven shaft, the jack catch card is gone into during driving groove and locked groove, the jack catch locking the rotation of driven shaft, the driving disc rotates so that the jack catch is deviate from during driving groove and locked groove, the jack catch unblock the rotation of driven shaft.

Furthermore, the jack catch is provided with a torsion spring for driving the jack catch to reset, and after the jack catch resets, the jack catch is clamped into the driving groove and the locking groove.

Furthermore, the locking groove is an arc-shaped groove, the clamping jaw is a sector plate, the arc surface of the sector plate is matched with the arc-shaped groove, the driving groove is a trapezoidal groove, and the opening of the trapezoidal groove is gradually increased outwards in the radial direction; or the cambered surface of the sector plate is provided with teeth, the peripheral side of the transmission disc is provided with tooth sockets meshed with the teeth, and the tooth sockets form the driving grooves.

Furthermore, a transmission convex column is arranged on the transmission disc, an arc-shaped transmission groove is coaxially arranged on the driven shaft, the transmission convex column is inserted into the arc-shaped transmission groove, the transmission disc drives the transmission convex column to rotate from the middle part of the arc-shaped transmission groove to the end part of the arc-shaped transmission groove, and the clamping jaw is separated from the driving groove and the locking groove.

Furthermore, a plurality of driving grooves are uniformly arranged on the peripheral side of the transmission disc in the circumferential direction at intervals, a plurality of locking grooves are formed in the driven shaft, and the plurality of clamping claws are clamped into the plurality of driving grooves and the plurality of locking grooves respectively to lock the rotation of the driven shaft.

Furthermore, the main part still includes relatively the fixed axle sleeve of automobile body fixed, fixed axle sleeve suit is in the driven shaft outside, retaining member rotates to be installed the terminal surface of fixed axle sleeve.

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

Further, the main part includes the casing and locates motor assembly in the casing, driving shaft, driving disc and retaining member are located in the casing, motor assembly drives the driving shaft rotates, driven shaft one end is located in the casing, the other end is worn out the casing outer with the trailer hook is connected.

Further, the main part is established including the cover the casing in the driving disk and the retaining member outside, driven shaft one end is located in the casing, the other end is worn out the casing outer with the tow hook is connected, driving shaft one end is located the casing, and the other end is worn out outside the casing.

The utility model has the beneficial effects that:

when the driving shaft drives the transmission disc to idle so as to unlock the locking piece or lock the rotation of the driven shaft, the transmission disc is in a rotating state and the driven shaft is kept in a non-rotating state. When the trailer coupler is used, the driving shaft drives the driving disc to idle firstly, so that the locking piece unlocks the driven shaft to rotate, the driven shaft can rotate, then the driving shaft continues to rotate and drives the driven shaft to rotate through the driving disc, the trailer coupler can be switched from a folding position to an unfolding position through the rotation of the driven shaft, then the driving shaft drives the driving disc to idle reversely to drive the locking piece to lock the rotation of the driven shaft, in the process of the driving shaft driving the driving disc to idle reversely, the driven shaft keeps still to keep the trailer coupler at the unfolding position, and after the locking piece locks the rotation of the driven shaft, the trailer coupler can be locked at the unfolding position, so that the trailer coupler is prevented from shaking during hanging, and the hanging performance is improved; similarly, when the trailer hook is switched from the unfolding position to the folding position, the unlocking principle and the locking principle are the same, and only the rotation direction of the driving shaft is different, so that the trailer hook can be locked at the folding position through the technical scheme of the utility model, the trailer hook is prevented from shaking when being in the folding position, and the hanging and loading performance of the trailer coupler is further improved. The locking piece is a claw which is rotatably installed, a driving groove is formed in the transmission disc, a locking groove is formed in the driven shaft, when the claw is clamped into the driving groove and the locking groove, the claw locks the driven shaft to rotate, and when the transmission disc rotates to enable the claw to be separated from the driving groove and the locking groove, the claw unlocks the driven shaft to rotate. So design, when the driving disk is idle, outside the lateral wall in accessible drive slot promoted the jack catch and rolled out drive slot and locked groove, realized the jack catch unblock from this and to the rotation of driven shaft, when the reverse idle running of driving disk, the jack catch resets and blocks in drive slot and the locked groove to the locking is to the rotation of driven shaft, avoids the driven shaft to take place to rotate. The jack catch is provided with a torsional spring for driving the jack catch to reset, and after the jack catch resets, the jack catch is clamped into the driving groove and the locking groove. So design, can make the jack catch rotate the rotation that realizes automatic re-setting with the locking driven shaft through the restoring force of torsional spring, simple structure, the equipment is convenient.

The locking groove is an arc-shaped groove, the clamping jaw is a sector plate, the arc surface of the sector plate is matched with the arc-shaped groove, the driving groove is a trapezoidal groove, and the opening of the trapezoidal groove is gradually increased outwards in the radial direction; or the cambered surface of the sector plate is provided with teeth, the peripheral side of the transmission disc is provided with tooth sockets meshed with the teeth, and the tooth sockets form driving grooves. So design can make the driving plate smoothly drive the jack catch and rotate and deviate from outside the locked groove, can promote the locking effect of jack catch and locked groove again under locking state.

The transmission disc is provided with a transmission convex column, the driven shaft is provided with an arc transmission groove which is coaxially arranged, the transmission convex column is inserted into the arc transmission groove, and when the transmission disc drives the transmission convex column to rotate to the end part of the arc transmission groove from the middle part of the arc transmission groove, the clamping jaw is separated from the drive groove and the locking groove. By the design, when the transmission convex column is driven by the transmission disc to rotate from the middle part of the arc-shaped transmission groove to the end part of the arc-shaped transmission groove, the idle rotation of the transmission disc can be realized, and the driven shaft does not rotate at the moment; when the transmission convex column moves to the end part of the arc-shaped transmission groove, the jaw unlocks the driven shaft to rotate, and the driven shaft can rotate at the moment, so that the transmission disc is continuously driven to rotate, the transmission convex column can drive the driven shaft to rotate, and the trailer hook is switched between a folding position and an unfolding position; when the transmission convex column moves to the middle part of the arc-shaped transmission groove from the end part of the arc-shaped transmission groove, the transmission disc idles, the driven shaft does not rotate, and when the transmission convex column moves to the middle part of the arc-shaped transmission groove, the jaw locks the rotation of the driven shaft.

The periphery side circumference of driving disc is evenly spaced and is equipped with a plurality of drive grooves, is equipped with a plurality of locked grooves on the driven shaft, and a plurality of jack catchs are blocked respectively in a plurality of drive grooves and a plurality of locked groove to the rotation of locking driven shaft. Through setting up a plurality of jack catchs and a plurality of locked groove locking cooperation one by one, can promote the locking effect to the driven shaft, further prevented from arousing rocking of tow hook because of the driven shaft rotates from this.

The main body further comprises a fixed shaft sleeve fixed relative to the vehicle body, the fixed shaft sleeve is sleeved on the outer side of the driven shaft, and the locking piece is rotatably installed on the end face of the fixed shaft sleeve. By the design, the driven shaft can be radially positioned through the fixed shaft sleeve, so that the coaxiality of the driven shaft and the transmission disc is ensured; and a carrier is provided for the installation of the locker, thereby simplifying the structure of the main body.

One of the inner peripheral side of the fixed shaft sleeve and the outer peripheral side of the driven shaft is provided with a limiting groove, the other one of the inner peripheral side of the fixed shaft sleeve and the outer peripheral side of the driven shaft is provided with a limiting boss inserted into the limiting groove, and the limiting boss moves between two ends of the limiting groove. By the design, the rotation angle of the driven shaft can be limited, so that the initial position and the end position of the driven shaft are ensured, and the locking effect of the drawing position and the unfolding position of the trailer hook is further ensured.

The main part includes the casing and locates the motor assembly in the casing, and driving shaft, driving disc and retaining member are located the casing, and motor assembly drive driving shaft rotates, and driven shaft one end is located the casing, and the other end is connected with the trailer hook outside passing through the casing. The driving shaft is driven to rotate through the motor assembly, so that the use experience of a user can be improved.

The main part is established the casing in the transmission disc and the retaining member outside including the cover, and driven shaft one end is located the casing, and the other end is worn out the casing and is connected with the trailer hook outward, and driving shaft one end is located the casing, and the other end is worn out outside the casing. So design, the user rotates the one end that the initiative axle stretches out the casing body outer through spanner or bare-handed and also can realize the drive driving axle and rotate, need not to set up motor assembly, has reduced the manufacturing cost of product from this, has also avoided the product simultaneously because of the unable normal use's of emergence electrical fault phenomenon.

These features and advantages of the present invention will be disclosed in more detail in the following detailed description and the accompanying drawings.

[ description of the drawings ]

The utility model is further described below with reference to the accompanying drawings:

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

FIG. 2 is a cross-sectional view of the trailer coupling as mounted to a vehicle body in accordance with one embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a driving disk and a driven shaft according to a first embodiment of the present invention;

FIG. 4 is a view showing a state where the lock member is engaged with the driving groove according to the first embodiment of the present invention;

FIG. 5 is a diagram illustrating a state where the locking member is engaged with the locking groove according to an embodiment of the present invention;

FIG. 6 is a cross-sectional view of a locking member engaged in a drive slot and a lock slot in accordance with one embodiment of the present invention;

FIG. 7 is a view showing a state where the lock member is disengaged from the driving groove and the locking groove in the first embodiment of the present invention;

FIG. 8 is a cross-sectional view of the stationary sleeve engaged with the driven shaft in accordance with one embodiment of the present invention;

FIG. 9 is a schematic view showing a state where the lock member locks the driven shaft in rotation in the second embodiment of the present invention;

fig. 10 is an exploded view of the trailer coupling in accordance with a third embodiment of the present invention.

Reference numerals:

100. a tow hook; 200. a drive shaft; 300. a locking member; 310. a torsion spring; 320. teeth; 400. a drive plate; 410. a drive slot; 420. a transmission convex column; 500. a driven shaft; 510. locking the groove; 520. an arc-shaped transmission groove; 530. a limiting boss; 600. a connecting plate; 700. a housing; 800. fixing the shaft sleeve; 810. a bolt; 820. a limiting groove; 900. a cover plate; 1000. an electric motor assembly.

[ detailed description ] embodiments

The utility model provides a trailer coupler with good hanging performance, which 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 part, a transmission disc and a driven shaft, the driven shaft is connected with the trailer hook and synchronously rotates, the driving shaft drives the transmission disc to idle so that the locking part unlocks or locks the rotation of the driven shaft, when the locking part 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 is switched between a folding position and an unfolding position, and when the trailer hook is in the folding position or the unfolding position, the locking part locks the rotation of the driven shaft.

When the driving shaft drives the transmission disc to idle so as to unlock the locking piece or lock the rotation of the driven shaft, the transmission disc is in a rotating state and the driven shaft is kept in a non-rotating state. When the trailer coupler is used, the driving shaft drives the driving disc to idle firstly, so that the locking piece unlocks the driven shaft to rotate, the driven shaft can rotate, then the driving shaft continues to rotate and drives the driven shaft to rotate through the driving disc, the trailer coupler can be switched from a folding position to an unfolding position through the rotation of the driven shaft, then the driving shaft drives the driving disc to idle reversely to drive the locking piece to lock the rotation of the driven shaft, in the process of the driving shaft driving the driving disc to idle reversely, the driven shaft keeps still to keep the trailer coupler at the unfolding position, and after the locking piece locks the rotation of the driven shaft, the trailer coupler can be locked at the unfolding position, so that the trailer coupler is prevented from shaking during hanging, and the hanging performance is improved; similarly, when the trailer hook is switched from the unfolding position to the folding position, the unlocking principle and the locking principle are the same, and only the rotation direction of the driving shaft is different, so that the trailer hook can be locked at the folding position through the technical scheme of the utility model, the trailer hook is prevented from shaking when being in the folding position, and the hanging and loading performance of the trailer coupler is further improved. The technical solutions of the embodiments of the present invention are explained and illustrated below with reference to the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.

Example one

Referring to fig. 1 to 8, the trailer coupler in this embodiment includes a main body fixed to an impact beam of a vehicle body and including a driving shaft 200, a locker 300, a driving plate 400, and a driven shaft 500, wherein the driven shaft 500 is connected to and rotates synchronously with the trailer coupler 100, the driving shaft 200 drives the driving plate 400 to idle so that the locker 300 locks or unlocks the rotation of the driven shaft 500, when the locker 300 unlocks the rotation of the driven shaft 500, the driving shaft 200 drives the driven shaft 500 to rotate through the driving plate 400 so that the trailer coupler 100 is switched between a folded position and an unfolded position, and when the trailer coupler 100 is in the folded position or the unfolded position, the locker 300 locks the rotation of the driven shaft 500.

In the present embodiment, when the driving shaft 200 drives the driving disc 400 to idle, so that the locker 300 locks or unlocks the rotation of the driven shaft 500, the driving disc 400 is in a rotated state and the driven shaft 500 is maintained in a non-rotated state. When the trailer coupler is used, the driving disc 400 is driven to idle through the driving shaft 200, the locking piece 300 is unlocked to rotate the driven shaft 500, so that the driven shaft 500 can rotate, then the driving shaft 200 continues to rotate and drives the driven shaft 500 to rotate through the driving disc 400, the trailer hook 100 can be switched from a folding position to an unfolding position through the rotation of the driven shaft 500, then the driving shaft 200 drives the driving disc 400 to idle in a reverse direction so as to drive the locking piece 300 to lock the rotation of the driven shaft 500, in the process that the driving shaft 200 drives the driving disc 400 to idle in the reverse direction, the driven shaft 500 is kept still so as to keep the trailer hook 100 at the unfolding position, and after the locking piece 300 locks the rotation of the driven shaft 500, the trailer hook 100 can be locked at the unfolding position, so that the trailer hook 100 is prevented from shaking during hanging, and the hanging performance is improved; similarly, when the trailer hook 100 is switched from the unfolding position to the folding position, the unlocking principle and the locking principle are the same, and only the rotation direction of the driving shaft 200 is different, so that the trailer hook 100 can be locked at the folding position by the technical scheme of the embodiment, and the trailer hook 100 is prevented from shaking when being in the folding position, thereby improving the hanging and loading performance of the trailer coupler.

Specifically, the main body in this embodiment further includes a connecting plate 600 fixedly connected to the anti-collision beam, and a housing 700 fastened to one side of the connecting plate 600, one end of a fixing shaft sleeve 800 is located in the housing 700, the other end of the fixing shaft sleeve penetrates through the connecting plate 600, the fixing shaft sleeve 800 and the housing 700 are both fixed to the connecting plate 600 through screws, and the fixing shaft sleeve 800 is sleeved on the outer side of the driven shaft 500 to radially position the driven shaft 500, so that the coaxiality of the driven shaft 500 and the transmission disc 400 is ensured; one end of the driven shaft 500 is located in the shell 700, the other end penetrates through the fixed shaft sleeve 800 to be connected with the trailer hook 100, the part of the driven shaft 500 connected with the trailer hook 100 is a non-circular surface matched with a non-circular hole in the trailer hook 100, so that the driven shaft 500 drives the trailer hook 100 to synchronously rotate, a cover plate 900 is further fixed in the shell 700, the transmission disc 400 is movably connected onto the cover plate 900 through a plane bearing, the driving shaft 200 penetrates through the cover plate 900 and the plane bearing and then is in transmission connection with the transmission disc 400, namely, the part of the driving shaft 200 matched with the non-circular hole in the transmission disc 400 is a non-circular surface, and the design can enable the driving shaft 200 to drive the transmission disc 400 to synchronously rotate.

As shown in fig. 3 to 7, the locking member 300 in this embodiment is a rotatably installed jaw, the jaw is a sector plate, the end surface of the fixing sleeve 800 in the housing 700 is provided with a bolt 810, the jaw is rotatably installed on the bolt 810, the jaw is sleeved with a torsion spring 310, one end of the torsion spring 310 is fixed on the fixing sleeve 800 or the cover plate 900, and the other end of the torsion spring 310 is fixed on a protrusion on the jaw, so that the jaw can be driven to rotate and reset by the restoring force of the torsion spring 310. In addition, the periphery of the transmission disc 400 of this embodiment is provided with a driving groove 410, the driving groove 410 is a trapezoidal groove, an opening of the trapezoidal groove is gradually increased radially outwards, one end of the driven shaft 500 close to the transmission disc 400 extends radially outwards to form a circular ring, the periphery of the circular ring is provided with a locking groove 510, the locking groove 510 is an arc-shaped groove, and the arc-shaped groove is matched with the arc surface of the sector plate. When the driving shaft 200 drives the driving disc 400 to idle, the jaws may be pushed by the sidewalls of the driving groove 410 to rotate out of the driving groove 410 and the locking groove 510, thereby realizing the rotation of the driven shaft 500 by the claw unlocking, enabling the driven shaft 500 to rotate, when the driving shaft 200 drives the driving plate 400 to idle reversely, the jaws are automatically restored by the restoring force of the torsion spring 310 and caught in the driving groove 410 and the locking groove 510, to lock the rotation of the driven shaft 500 to prevent the driven shaft 500 from rotating, and, when the driven shaft 500 is locked, no force is transmitted between the jaws and the driving grooves 410, thereby achieving the separation of the driven shaft 500 from the driving plate 400 in the locked state, further avoiding the driving shaft 200 from being in a stressed state for a long time, further prolonging the service life of the driving shaft 200, and especially prolonging the service life of the motor assembly when the driving shaft 200 is driven to rotate by the motor assembly; in addition, the driving groove 410 in this embodiment is designed as a trapezoidal groove, so that the driving plate 400 can smoothly drive the claw to rotate and get out of the locking groove 510, and the locking groove 510 is designed to match with the arc surface of the sector plate, so that the locking effect of the claw and the locking groove 510 can be improved in a locking state.

It will be appreciated that in other embodiments of the utility model, the inner side wall of the housing is provided with an annular mounting plate surrounding the outside of the driven shaft, the locking member being rotatably mounted on the mounting plate.

In order to realize the idle rotation of the transmission disc 400 relative to the driven shaft 500, in this embodiment, the disc surface of the transmission disc 400 is provided with a transmission convex column 420 extending axially, the driven shaft 500 is provided with an arc-shaped transmission groove 520 arranged coaxially, the transmission convex column 420 is inserted into the arc-shaped transmission groove 520, the transmission convex column 420 is located in the middle of the arc-shaped transmission groove 520 in the state that the jaw locks the driven shaft 500, when the driving shaft 200 drives the transmission disc 400 to rotate so that the transmission disc 400 drives the transmission convex column 420 to rotate from the middle of the arc-shaped transmission groove 520 to the end of the arc-shaped transmission groove 520, the jaw is separated from the driving groove 410 and the locking groove 510, the jaw unlocks the rotation of the driven shaft 500, in the process that the transmission convex column 420 rotates from the middle of the arc-shaped transmission groove 520 to the end of the arc-shaped transmission groove 520, because the transmission convex column 420 slides in the arc-shaped transmission groove 520, no torque is applied to the driven shaft 500, so that the transmission disc 400 rotates, while the driven shaft 500 is not moved, thereby realizing idle rotation of the transmission disc 400; after the pawl unlocks the driven shaft 500 to rotate, when the transmission disc 400 is continuously driven to rotate, the transmission convex column 420 drives the driven shaft 500 to rotate by driving the groove wall of the arc-shaped transmission groove 520, so that the trailer hook 100 can be switched between the folding position and the unfolding position; subsequently, the driving shaft 200 drives the transmission disc 400 to rotate reversely, so that the driven shaft 500 does not rotate at the moment in the process that the transmission convex column 420 moves from the end part of the arc-shaped transmission groove to the middle part of the arc-shaped transmission groove, so as to keep the trailer hook 100 in the folded position or the unfolded position, and when the transmission convex column 420 moves to the middle part of the arc-shaped transmission groove 520, the jaws are reset and clamped into the driving groove 410 and the locking groove 510, so as to lock the rotation of the driven shaft 500.

In order to enable the driving disc 400 to drive the driven shaft 500 to rotate stably, two driving convex columns 420 are arranged on the disc surface of the driving disc 400 in the embodiment in a central symmetry mode, and two arc-shaped driving grooves 520 are formed in the corresponding driven shaft 500.

In order to improve the locking effect to driven shaft 500, in order to further prevent to rotate because of driven shaft 500 and arouse shaking of towing hook 100, the periphery side circumference of driving plate 400 is evenly spaced and is equipped with a plurality of drive slots 410 in this embodiment, be equipped with a plurality of locked groove 510 on the driven shaft 500, a plurality of jack catchs are blocked respectively in a plurality of drive slots 410 and a plurality of locked groove 510, in order to lock the rotation of driven shaft 500, can promote the locking effect to driven shaft 500 from this, further prevented to rotate because of driven shaft 500 and arouse shaking of towing hook 100. The number of preferred jack catchs in this embodiment, the quantity of drive groove 410 and the quantity of locked groove 510 equal, and the quantity of drive groove 410, locked groove 510 and jack catchs is 4, so design, through setting up 4 jack catchs and 4 locked groove 510 locking cooperation one by one and promoting the locking effect to driven shaft 500.

It will be appreciated that in other embodiments of the present invention, the number of the driving grooves and the locking grooves may be more than the number of the claws, and the claws are clamped into some of the locking grooves and the driving grooves, for example, the number of the claws is 3, the number of the driving grooves and the locking grooves is 6, and 3 claws are clamped into three of the locking grooves and three of the driving grooves, so that the design can also improve the locking effect on the driven shaft.

It is understood that, in other embodiments of the present invention, the arc-shaped transmission groove may be further disposed on the disk surface of the transmission disk, the transmission convex pillar is disposed on the driven shaft, the transmission convex pillar is inserted into the arc-shaped transmission groove, the transmission convex pillar is located in the middle of the arc-shaped transmission groove when the locking member locks the rotation of the driven shaft, and the transmission convex pillar abuts against the end of the arc-shaped transmission groove when the locking member unlocks the rotation of the driven shaft.

For a better understanding of the present solution, the following description will be given of the principle of operation of the trailer coupling in this embodiment:

as shown in fig. 4, the locking member 300 locks the rotation of the driven shaft 500, at this time, the trailer hook 100 is in the folded position, the driving shaft 200 drives the transmission disc 400 to rotate clockwise, in the process that the transmission convex pillar 420 moves 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 jaw to rotate towards the outside of the locking groove 510, after the transmission convex pillar 420 moves to the right end of the arc-shaped transmission groove 520, the jaw is disengaged from the driving groove 410 and the locking groove 510 (as shown in fig. 5), so as to realize the rotation of the unlocking driven shaft 500, the driving shaft 200 continues to drive the transmission disc 400 to rotate clockwise, at this time, the driven shaft 500 drives the trailer hook 100 to rotate synchronously under the driving of the transmission convex pillar 420 until the trailer hook 100 rotates to the unfolded position, and then, the driving shaft 200 drives the transmission disc 400 to idle in the reverse direction, i.e. to idle in the counterclockwise direction, in the process that the transmission convex pillar 420 moves from the right 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 at the unfolded position, after the transmission convex column 420 moves to the middle part of the arc-shaped transmission groove 520, the driving groove 410 corresponds to the locking groove 510, 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, and therefore the rotation of the locked driven shaft 500 is achieved, namely the rotation of the driven shaft 500 is prevented, and the trailer hook 100 is prevented from shaking at the unfolded position.

Similarly, when the trailer hook 100 needs to be switched from the unfolding position to the folding position, the driving shaft 200 drives the transmission disc 400 to idle counterclockwise, in the process that the transmission convex column 420 moves 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 jaws to rotate towards the outer side of the locking groove 510, after the transmission convex column 420 moves to the end of the arc-shaped transmission groove 520, the jaws are separated from the driving groove 410 and the locking groove 510, so as to unlock the rotation of the driven shaft 500, the driving shaft 200 continues to drive the transmission disc 400 to rotate counterclockwise, at this time, the driven shaft 500 drives the trailer hook 100 to rotate synchronously under the driving of the transmission convex column 420 until the trailer hook 100 rotates to the folding position, then, the driving shaft 200 drives the transmission disc 400 to idle in the reverse direction, namely, idle clockwise, in the process that the transmission convex column 420 moves 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 furled position, after the transmission convex column 420 moves to the middle of the arc-shaped transmission groove 520, the driving groove 410 corresponds to the locking groove 510, and the jaw is reset under the restoring force of the torsion spring 310 and is clamped into the driving groove 410 and the locking groove 510, so that the rotation of the driven shaft 500 is locked, that is, the rotation of the driven shaft 500 is prevented, and further the trailer hook 100 is prevented from shaking in the furled position.

In order to ensure that the driving grooves 410 and the locking grooves 510 can be in one-to-one correspondence after the transmission disc 400 reversely idles so that the jaws are clamped into the driving grooves 410 and the locking grooves 510, when the towing hook 100 is switched between the folded position and the unfolded position, a rotation angle required by the driven shaft 500 needs to be limited, and in order to ensure accuracy of limiting the rotation angle, as shown in fig. 8, an arc-shaped limiting groove 820 is arranged on the inner peripheral side of the fixed shaft sleeve 800 in the embodiment, a limiting boss 530 is arranged on the outer peripheral side of the driven shaft 500 matched with the fixed shaft sleeve 800, and the limiting boss 530 moves between two ends of the limiting groove 820, so that the rotation angle of the driven shaft 500 is limited by limiting the rotation angle of the limiting boss 530, that is, the initial position and the end position of the driven shaft 500 are ensured, and further, locking effects of the folded position and the unfolded position of the towing hook 100 are ensured.

It is understood that in other embodiments of the present invention, the arc-shaped limit groove may be disposed on the outer circumferential side of the driven shaft, and the limit boss is protruded on the inner circumferential side of the fixed shaft sleeve.

Finally, in order to improve the use experience of the product, a motor assembly 1000 is further disposed in the housing 700 in this embodiment, the driving shaft 200 is located in the housing 700 and connected to an output shaft sleeve of the motor assembly 1000, and the motor assembly 1000 drives the driving shaft 200 to rotate, so that the towing hook 100 is switched between the folded position and the unfolded position. In the whole process, a user does not need to manually drive the driving shaft 200 to rotate, so that the use experience of the product is improved.

Example two

As shown in fig. 9, compared with the first embodiment, the present embodiment is different in that teeth 320 are provided on the arc surfaces of the jaws, a tooth socket engaged with the teeth is provided on the outer peripheral side of the transmission disc 400, and preferably, the transmission disc 400 is a gear, and the tooth socket forms a driving groove 410, so that the jaws can be pushed out of the locking groove 510 by the groove wall of the driving groove 410.

EXAMPLE III

As shown in fig. 10, compared with the first embodiment and the second embodiment, the difference of the present embodiment is that the fixing sleeve 800 and the connecting plate 600 are integrally formed to form a connecting fixing plate, and the connecting fixing plate is fixed on the impact beam.

Example four

Compared with the first to third embodiments, the present embodiment is different in that a motor assembly is not disposed in the housing 700 in the present embodiment, in this case, one end of the driving shaft 200 extends out of the housing 700, and a user can rotate the end of the driving shaft 200 extending out of the housing 700 by a wrench or a bare hand to drive the driving shaft 200 to rotate, so that the towing hook 100 is switched between the folded position and the unfolded position, thereby reducing the manufacturing cost of the product, and simultaneously avoiding the phenomenon that the product cannot be normally used due to an electrical failure.

While the utility model has been described with reference to specific embodiments thereof, it will be understood by those skilled in the art that the utility model is not limited thereto, and may be embodied in many different forms without departing from the spirit and scope of the utility model as set forth in the following claims. Any modification which does not depart from the functional and structural principles of the present invention is intended to be included within the scope of the claims.

Claims (10)

1. The utility model provides a trailer coupling that carry performance is good, includes main part and trailer hook, the main part is fixed on the automobile body, a serial communication port, the main part includes driving shaft, retaining member, driving disk and driven shaft, the driven shaft with trailer hook is connected and synchronous the rotation, the driving shaft drive the driving disk idle running, so that retaining member unblock or locking the rotation of driven shaft, the retaining member unblock during the rotation of driven shaft, the driving shaft passes through the driving disk drives the driven shaft rotates, so that trailer hook switches between draw in the position and expand the position, when trailer hook is in draw in the position or expands the position, the retaining member locking the rotation of driven shaft.

2. The trailer coupling with good hanging performance as claimed in claim 1, wherein the locking member is a claw rotatably mounted, the driving disc is provided with a driving groove, the driven shaft is provided with a locking groove, the claw locks the rotation of the driven shaft when the claw is clamped into the driving groove and the locking groove, and the driving disc rotates to enable the claw to be disengaged from the driving groove and the locking groove, and the claw unlocks the rotation of the driven shaft.

3. A trailer coupling with good hanging performance as claimed in claim 2, wherein the jaw is provided with a torsion spring for driving the jaw to reset, and after the jaw is reset, the jaw is clamped in the driving groove and the locking groove.

4. The trailer coupling with good hanging performance as claimed in claim 2, wherein the locking slot is an arc-shaped slot, the jaw is a sector plate, the arc surface of the sector plate is matched with the arc-shaped slot, the driving slot is a trapezoidal slot, and the opening of the trapezoidal slot is gradually increased radially outwards; or the cambered surface of the sector plate is provided with teeth, the outer peripheral side of the transmission disc is provided with tooth sockets meshed with the teeth, and the tooth sockets form the driving grooves.

5. The trailer coupling with good hanging performance as claimed in claim 3, wherein the driving disc is provided with a driving convex column, the driven shaft is provided with a coaxially arranged arc-shaped driving groove, the driving convex column is inserted into the arc-shaped driving groove, and when the driving disc drives the driving convex column to rotate from the middle part of the arc-shaped driving groove to the end part of the arc-shaped driving groove, the claw is disengaged from the driving groove and the locking groove.

6. A trailer coupling with good mounting performance as claimed in claim 3, wherein a plurality of said driving grooves are circumferentially and uniformly arranged on the outer peripheral side of said driving disk, a plurality of said locking grooves are arranged on said driven shaft, and a plurality of said claws are respectively locked in a plurality of said driving grooves and a plurality of said locking grooves to lock the rotation of said driven shaft.

7. A trailer coupling as claimed in claim 1 wherein said body further comprises a fixed collar fixed relative to said body, said fixed collar being mounted around said driven shaft, said locking member being pivotally mounted to an end surface of said fixed collar.

8. A trailer coupling with improved carrying characteristics as claimed in claim 7, wherein one of an inner circumferential side of said fixed sleeve and an outer circumferential side of said driven shaft is provided with a limit groove, and the other is provided with a limit boss inserted into said limit groove, said limit boss moving between both ends of said limit groove.

9. The trailer coupling with good hanging performance as claimed in any one of claims 1 to 8, wherein the main body comprises a housing and a motor assembly arranged in the housing, the driving shaft, the transmission disc and the locking member are positioned in the housing, the motor assembly drives the driving shaft to rotate, one end of the driven shaft is positioned in the housing, and the other end of the driven shaft penetrates out of the housing to be connected with the trailer coupling.

10. The trailer coupling with good hanging performance as claimed in any one of claims 1 to 8, wherein the main body comprises a housing covering the outside of the transmission disc and the locking member, one end of the driven shaft is located in the housing, the other end of the driven shaft penetrates out of the housing to be connected with the trailer coupling, one end of the driving shaft is located in the housing, and the other end of the driving shaft penetrates out of the housing.

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