Self-pre-tightening winch and vertical lifting automobile tailboard using same

Abstract

The utility model provides a self-pre-tightening winch and a vertical lifting automobile tailboard using the same, and belongs to the technical field of automobile accessories. Power is output to the speed reducer through the take-up and pay-off driver, the main rotating disc is rotationally installed on the output shaft of the speed reducer, the coil spring is arranged between the output shaft and the main rotating disc for transmission, and whether the main rotating disc rotates relative to the output shaft or not is achieved through rotating tightening or reverse rotating loosening of the coil spring. Therefore, when the rear tail plate ascends and descends after being unfolded, under the condition that the output shaft is static, the main wheel disc continues to rotate relative to the output shaft through reverse rotation loosening and rotation tightening of the coil spring, and therefore the pull rope can be in a pre-tightening state when the pull rope is loosened due to ascending of the rear tail plate and the pull rope needs to be continuously released due to descending of the rear tail plate. Therefore, the use requirement that the pull rope needs to be continuously released due to descending of the rear tailboard is met, the pull rope can be always kept in a pre-tightening state, neatness is kept, and normal use of the vertical lifting automobile tailboard can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile accessories, in particular to a self-preloaded winch and a vertical lifting automobile tail plate using the same. Background Art

[0002] As an auxiliary equipment installed on the car body, the vertical lifting tailgate can be raised and lowered between the bottom of the car body and the ground, thereby realizing the transfer of goods and reducing the labor burden of goods transfer.

[0003] Patent CN115139886A discloses a car tailgate lifting mechanism, which has cavities on both sides of the mounting frame installed on the car body tailgate, a lifting rod is slidably connected to the front inner wall of the cavity, the bottom ends of the two lifting rods are hinged on both sides of the front end of the rear tailgate, a winch is arranged on the top of the lifting rod, the winch is connected to one side of the top of the rear tailgate through a steel wire rope, side baffles are slidably connected on both sides of the top of the rear tailgate, and a rear baffle is arranged on the rear side of the top of the rear tailgate. When the car tailgate needs to be lowered, the winch is turned on to extend the steel wire rope, and the rear tailgate falls backwards until it is horizontal. When the car tailgate needs to be folded up, the winch is turned on to rotate in the opposite direction, and the steel wire rope is reeled back to realize the upward flipping and closing of the rear tailgate. However, the existing winches on the market usually only include a driver, a reducer and a retracting wheel. The driver is connected to the input end of the reducer, and the retracting wheel is installed on the output end of the reducer. The wire rope is wound around the retracting wheel, and the retracting wheel is driven by the driver and the reducer to rotate forward and reversely to realize the retraction and release of the wire rope. Although the structure of the existing winch can meet the retraction and release requirements of the wire rope, for some vertically lifted car tailgates, they still need to be lifted in the vertical direction after the rear tailgate is unfolded. At this time, if the winch is installed on the car body, the wire rope will be relaxed or continued to be tightened during the lifting and lowering of the rear tailgate. When the wire rope is relaxed, the problem of the wire rope being messy will occur, and when it is continued to be tightened, it will limit the continued descent of the rear tailgate, thereby affecting the normal use of the vertically lifted car tailgate. Summary of the invention

[0004] In view of the above-mentioned problems existing in the prior art, the present invention aims to provide a self-pretensioning winch and a vertically lifting automobile tailboard using the same, wherein a coil spring is arranged between the output shaft and the main turntable, and the coil spring is used as a transmission structure between the output shaft and the main turntable, so that when the rear tailboard is unfolded and then lifted or lowered, the main turntable can continue to rotate by rotating and tightening the coil spring and reversely loosening it, and the pull rope that is relaxed when the rear tailboard rises can be tightened by its own elastic force, and the pull rope can also be released to adapt to the use occasion where the pull rope is stretched when the rear tailboard is lowered, thereby ensuring that the pull rope can always be in a pretensioned state and will not hinder the normal use of the vertically lifting automobile tailboard.

[0005] The specific technical solutions are as follows:

[0006] A self-pretensioning winch, mounted on a vehicle body, has the following characteristics, including:

[0007] A mounting frame, one side of the mounting frame is fixedly mounted on the vehicle body;

[0008] A retractable driver, the retractable driver is installed on a mounting frame;

[0009] The reducer, the input shaft of the reducer is connected to the retractable drive power

[0010] A main rotating disc, which is rotatably mounted on the output shaft of the reducer, and one end of a pull rope is wound around the main rotating disc;

[0011] Auxiliary turntable, the auxiliary turntable is sleeved on the output shaft;

[0012] The coil spring is wound around the output shaft of the reducer, and the inner ring end of the coil spring is fixed to the outside of the output shaft, and the outer ring end of the coil spring is fixed to the main rotating disk.

[0013] The above-mentioned self-pretensioning winch, wherein the reducer includes a reduction box, a worm, a worm wheel, a worm wheel shaft, a pinion and a large gear, the reduction box is installed on a mounting frame, the worm is rotatably installed on the reduction box and one end of the worm is connected to the retraction and extension drive power as an input shaft, the worm wheel shaft is rotatably installed in the reduction box and is sleeved with a worm wheel, and the worm wheel is meshed with the worm, and a pinion is also sleeved on the worm wheel shaft, and at the same time, the output shaft is rotatably installed in the reduction box and is sleeved with a large gear, and the large gear is meshed with the pinion.

[0014] In the above-mentioned self-pretensioning winch, the main turntable includes a disk-shaped cavity, a turntable cover is arranged at the cavity opening of the disk-shaped cavity, and the coil spring is installed in the disk-shaped cavity.

[0015] The above-mentioned self-pretensioning winch, wherein the inner ring end of the coil spring is bent to form a clamping head, the outer ring end of the coil spring is bent to form a hook, a clamping groove matching the clamping head is provided on the outer wall of the output shaft, and a groove corresponding to the hook is provided on the main turntable.

[0016] In the above-mentioned self-pretensioning winch, two groups of small gears and large gears are provided, and the two groups of small gears and the two groups of large gears are meshed with each other in a one-to-one correspondence.

[0017] A vertical lifting automobile tailgate has the following technical features, uses the above-mentioned self-preloaded winch, and also includes:

[0018] A lifting assembly is arranged below the self-preloaded winch. The lifting assembly includes a lifting bracket, a lifting rail, a telescopic driver, a pulley and a sliding belt. The lifting bracket is fixedly mounted on the vehicle body. The lifting rail and the telescopic driver are both mounted on the lifting bracket and both perform lifting motion in the vertical direction. The driving shaft of the telescopic driver is arranged vertically upward and is rotatably mounted with a pulley. One end of the sliding belt is fixedly connected to the vehicle body or the lifting bracket, and the other end of the sliding belt is connected to the lifting portion of the lifting rail after passing the pulley.

[0019] A rear tail plate, one end of which is hinged on the lifting part of the lifting rail, and the other end of which is connected to the other end of the pull rope;

[0020] The tension chain is tightened, and the two ends of the tension chain are respectively hinged on the lifting part and the rear tail plate of the lifting rail.

[0021] The above-mentioned vertical lifting car tailgate, wherein, also includes a top door assembly, the top door assembly includes a top plate, a top door, a turn pin, a torsion spring and a top door pull rope, one end of the top plate is fixed to the vehicle body, one side of the top door is hinged to the top plate through the turn pin, the torsion spring is sleeved outside the turn pin and the two ends are respectively against the top plate and the top door, one end of the top door pull rope is connected to the other end of the top plate, and the other end of the top door pull rope is wound on the auxiliary turntable.

[0022] In the above-mentioned vertical lifting tailgate of an automobile, the torsion force of the torsion spring is greater than the gravity of the top door, and the sum of the pulling force of the auxiliary turntable on the top door pull rope and the gravity of the top door is greater than the torsion force of the torsion spring.

[0023] In the above-mentioned vertical lifting automobile tailgate, the retracting and extending driver is an electric motor, and the telescopic driver is an electric push rod.

[0024] The positive effects of the above technical solution are:

[0025] The above-mentioned self-pretensioning winch and the vertical lifting automobile tailgate using the same are provided with a coil spring between the output shaft of the reducer and the main wheel disc, and the coil spring is used as a transmission structure between the output shaft and the main wheel disc. The rotation and tightening or reverse rotation and relaxation of the coil spring are used to realize whether the main wheel disc rotates relative to the output shaft. Therefore, when the rear tailgate is unfolded and then raised, the reverse rotation and relaxation of the coil spring are used to continue to drive the main wheel disc to rotate when the output shaft is stationary, so that the pull rope released due to the rising of the rear tailgate can be continued to be tightened, and when the rear tailgate is lowered, the rotation of the main wheel disc can be continued to be maintained by rotating and tightening the coil spring, thereby continuing to release the pull rope, thereby meeting the demand for continuing to release the pull rope due to the lowering of the rear tailgate, so that the pull rope can always maintain a pre-tensioned state, which not only maintains cleanliness but also ensures the normal use of the vertical lifting automobile tailgate. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1It is a structural diagram of an embodiment of a self-pretensioning winch of the utility model;

[0027] Figure 2 This is a structural diagram of a self-pretensioning winch of the utility model after the accelerator is opened;

[0028] Figure 3 It is a schematic diagram of the installation of a main wheel, a coil spring and an output shaft of a self-preloaded winch of the utility model;

[0029] Figure 4 This is a structural diagram of a vertically lifting automobile tailgate using a self-preloaded winch according to the utility model;

[0030] Figure 5 The utility model is a structural diagram of a top door assembly of a vertically lifting automobile tailgate using a self-pretensioning winch.

[0031] In the accompanying drawings: 1. mounting frame; 2. retractable drive; 3. reducer; 31. reduction gear box; 32. worm; 33. worm wheel; 34. worm wheel shaft; 35. small gear; 36. large gear; 37. output shaft; 38. pull rope; 371. slot; 4. main turntable; 41. disc-shaped cavity; 42. turntable cover; 43. groove; 5. coil spring; 51. clamp head; 52. hook; 6. auxiliary turntable; 7. lifting assembly; 71. lifting bracket; 72. lifting rail; 73. telescopic drive; 74. pulley; 75. slide belt; 8. rear tail plate; 81. tension chain; 9. top door assembly; 91. top plate; 92. top door; 93. turn pin; 94. torsion spring; 95. top door pull rope. DETAILED DESCRIPTION

[0032] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the following embodiments are combined with the attached Figure 1 To Attachment Figure 5 The technical solution provided by the utility model is described in detail, but the following content is not intended to limit the utility model.

[0033] Figure 1 It is a structural diagram of an embodiment of a self-pretensioning winch of the utility model; Figure 2 This is a structural diagram of a self-preloaded winch of the utility model after the accelerator is opened. Figure 1 and Figure 2 As shown, the self-pretensioning winch provided in this embodiment includes: a mounting frame 1, a retracting and releasing drive 2, a reducer 3, a main turntable 4 and a coil spring 5.

[0034] Specifically, one side of the mounting frame 1 is fixedly mounted on the vehicle body, thereby achieving stable installation of the self-preloaded winch on the vehicle body and providing a carrier for the installation of subsequent structures such as the retractable drive 2, the reducer 3, the main turntable 4 and the coil spring 5.

[0035] Specifically, the retractable drive 2 is installed on the mounting frame 1, so that the retractable drive 2 is stably installed relative to the vehicle body. At the same time, the retractable drive 2 provides power for the subsequent rotation of the main turntable 4 and the auxiliary turntable 6.

[0036] Specifically, the input shaft of the reducer 3 is connected to the power of the retractable drive 2, so that the power of the retractable drive 2 can be input into the reducer 3 through the input shaft, thereby increasing the torque and reducing the speed, which is beneficial to the subsequent reeling and releasing rope 38 to realize the opening or closing of the rear tail plate 8.

[0037] More specifically, a main rotating disc 4 is rotatably mounted on the output shaft 37 of the reducer 3, so that the main rotating disc 4 can rotate with the output shaft 37 of the reducer 3 as the axis, which provides conditions for the subsequent main rotating disc 4 to continue to rotate relative to the output shaft 37. At this time, one end of a pull rope 38 is wound around the main rotating disc 4, and the pull rope 38 is wound and released by the rotation of the main rotating disc 4, thereby providing conditions for the subsequent opening or closing of the rear tailgate 8 by the pull rope 38.

[0038] Specifically, it also includes an auxiliary turntable 6, and the auxiliary turntable 6 is sleeved on the output shaft 37, so that the rotation of the output shaft 37 can also drive the auxiliary turntable 6 to rotate. Through the setting of the auxiliary turntable 6, the function of the output shaft 37 is expanded, so that the self-pretensioning winch can subsequently act on the top door assembly 9 at the same time, thereby improving the utilization rate of the self-pretensioning winch.

[0039] Figure 3 The figure is a schematic diagram of the installation of the main turntable, coil spring and output shaft of a self-preloaded winch of the utility model. Figure 2 and Figure 3As shown, a coil spring 5 is wound around the output shaft 37 of the reducer 3. At this time, the inner ring end of the coil spring 5 is fixed to the outside of the output shaft 37, and the outer ring end of the coil spring 5 is fixed to the main turntable 4, that is, the main turntable 4 and the output shaft 37 of the reducer 3 are connected through the coil spring 5. When the coil spring 5 is rotated and tightened, elastic release energy will be stored, and after it is tightened to the limit position, the main turntable 4 and the output shaft 37 will be hard connected, so that the output shaft 37 can drive the main turntable 4 to rotate, realize the lifting of the rear tail plate 8, and realize the closing of the rear tail plate 8. When the coil spring 5 is not tightened to the limit position, the main turntable 4 can still rotate relatively on the output shaft 37, providing a margin for the subsequent extension of the pull rope 38 as the rear tail plate 8 vertically descends. In addition, when the coil spring 5 is reversely rotated and relaxed, the coil spring 5 releases elastic energy and drives the main turntable 4 to rotate, so that the pull rope 38 that is relaxed when the rear tail plate 8 rises vertically can be tightened by the main turntable 4, ensuring that the pull rope 38 is always in a pre-tightened state, and when the coil spring 5 is reversely rotated and relaxed to an extreme state, the rear tail plate 8 rises vertically to a highest state, ensuring that the pull rope 38 can always be pre-tightened, and the structural design is more reasonable. It is worth pointing out that the gravity of the rear tail plate 8 is much greater than the torsion of the coil spring 5, and at the same time, the torsion of the coil spring 5 is greater than the deadweight of the pull rope 38, thereby ensuring that the opening and closing of the rear tail plate 8 can only be driven by the retracting and releasing driver 2, and the pre-tightening of the pull rope 38 is achieved by the coil spring 5.

[0040] More specifically, the reducer 3 connected to the retractable drive 2 includes a reduction box 31, a worm 32, a worm wheel 33, a worm wheel shaft 34, a pinion 35 and a large gear 36. At this time, the reduction box 31 is mounted on the mounting frame 1, and the worm 32 is rotatably mounted on the reduction box 31, and one end of the worm 32 is connected to the retractable drive 2 as an input shaft, so that the retractable drive 2 can drive the worm 32 to rotate. Preferably, a coupling is provided between the worm 32 and the main shaft of the retractable drive 2, and the coupling facilitates the connection between the worm 32 and the main shaft of the retractable drive 2. In addition, the worm wheel shaft 34 is rotatably installed in the reduction box 31 and is sleeved with the worm wheel 33. Preferably, the worm wheel 33 and the worm wheel shaft 34 are an integrated structure or a connecting key is provided between the two, so as to realize circumferential power transmission. Furthermore, the worm wheel 33 meshes with the worm 32, that is, the transmission between the retractable and unretractable driver 2 and the output shaft 37 is the worm wheel 33 and the worm 32, which realizes the reverse self-locking of the transmission force, so that the output shaft 37 cannot reversely drive the retractable and unretractable driver 2 to move, ensuring safety. In addition, a pinion 35 is sleeved on the worm shaft 34, and at this time, the pinion 35 rotates with the worm shaft 34, and at the same time, the output shaft 37 is rotatably installed in the reduction box body 31 and sleeved with a large gear 36, and the large gear 36 meshes with the pinion 35, that is, the cooperation of the pinion 35 and the large gear 36 realizes the deceleration and increases the torque, so that the output shaft 37 can drive the main turntable 4 to retract and release the pull rope 38 later.

[0041] More specifically, a disc-shaped cavity 41 is provided on one end face of the main turntable 4 for winding the pull rope 38, and the disc-shaped cavity is arranged coaxially with the main turntable 4. At the same time, a turntable cover 42 is provided at the cavity mouth of the disc-shaped cavity 41. The turntable cover 42 is used to open or close the cavity mouth of the disc-shaped cavity 41, and the coil spring 5 is installed in the disc-shaped cavity 41. That is, the disc-shaped cavity 41 provides installation and movement space for the arrangement of the coil spring 5. At the same time, space utilization is realized, avoiding the problem of excessive occupation of the axial space of the output shaft 37 and causing the device to be too large.

[0042] More specifically, when the coil spring 5 is manufactured, the inner ring end of the coil spring 5 is bent to form a clamp 51, and the outer ring end of the coil spring 5 is bent to form a hook 52, and a connection structure that is easy to install is formed at both ends of the coil spring 5 through the clamp 51 and the hook 52. At this time, a clamping groove 371 that cooperates with the clamp 51 is provided on the outer wall of the output shaft 37, and the clamping groove 371 is arranged along the axial direction of the output shaft 37, which facilitates the clamp 51 to be clamped into the clamping groove 371 from the axial direction of the output shaft 37. At the same time, a groove 43 corresponding to the hook 52 is provided on the main turntable 4. Preferably, the groove 43 is provided on the inner wall of the disc-shaped cavity 41, so that the hook 52 and the groove 43 are matched, thereby realizing the rapid installation of the coil spring 5 between the output shaft 37 and the main turntable 4.

[0043] More specifically, the reducer 3 has two groups of small gears 35 and large gears 36. At this time, the two groups of small gears 35 and the two groups of large gears 36 are meshed one by one, and the two groups of small gears 35 are respectively located on both sides of the worm 32. Similarly, the two groups of large gears 36 are also located on both sides of the worm 32, realizing double-gear transmission, higher transmission reliability, and more stable transmission, thereby ensuring better output stability of the output shaft 37.

[0044] In addition, this embodiment also provides a vertically lifting automobile tailgate using the above-mentioned self-pretensioning winch. Figure 4 This is a structural diagram of a vertically lifting automobile tailgate using a self-preloaded winch according to the utility model. Figure 4 As shown, the vertically lifting automobile tailgate provided in this embodiment, under the premise of using the above-mentioned self-pretensioning winch, also includes a lifting assembly 7, a rear tailgate 8 and a tensioning chain 81.

[0045] Specifically, the lifting assembly 7 is arranged below the self-pretensioning winch, so as to avoid the lifting movement of the lifting assembly 7 interfering with the installation of the self-pretensioning winch, and also provide conditions for the subsequent self-pretensioning winch to use the pretensioning rope 38. In addition, the lifting assembly 7 includes a lifting bracket 71, a lifting rail 72, a telescopic driver 73, a pulley 74 and a sliding belt 75. At this time, the lifting bracket 71 is fixedly installed on the vehicle body, so as to achieve stable installation on the vehicle body. At the same time, the lifting rail 72 and the telescopic driver 73 are both installed on the lifting bracket 71, and the lifting rail 72 performs a lifting movement in the vertical direction. The driving shaft of the telescopic driver 73 also performs a lifting movement upward in the vertical direction, and a pulley 74 is rotatably installed on the driving shaft of the telescopic driver 73, so that the pulley 74 can change its height in the vertical direction. In addition, one end of a sliding belt 75 is fixedly connected to the vehicle body or the lifting bracket 71 to achieve the fixation of one end of the sliding belt 75, and the other end of the sliding belt 75 is passed around the pulley 74 and connected to the lifting part of the lifting rail 72, so that when the driving shaft of the telescopic driver 73 performs a lifting movement in the vertical direction, the sliding belt 75 can slide on the pulley 74, thereby realizing the pulling up and lowering of the other end of the sliding belt 75, thereby realizing the lifting and lowering of the lifting part of the lifting rail 72 in the vertical direction, providing power for the subsequent vertical lifting of the rear tail plate 8 in the vertical direction. In addition, the structure of the pulley 74 and the slide belt 75 is used, and the pulley 74 is installed on the driving shaft of the telescopic driver 73 that can be lifted and lowered, forming a movable pulley 74 structure, so that even when the stroke of the telescopic driver 73 is small, the other end of the slide belt 75 can also be moved with a large stroke, which is convenient for miniaturization of the telescopic driver 73. In addition, the pulley 74 is preferably an idle sprocket, and the slide belt 75 is preferably a transmission chain matched therewith, which not only has high structural strength, but also can prevent the problem of slipping during use, and the structural design is more reasonable. It is worth pointing out that the lifting rail 72 can be a structure including a fixed guide groove and a lifting part, the fixed guide groove is fixedly installed on the lifting bracket 71 in the vertical direction, the lifting part is slidably arranged in the fixed guide groove in the vertical direction, and the top end of the lifting part is connected to the non-fixed end of the slide belt 75, so as to achieve stable lifting movement.

[0046] Specifically, one end of the rear tail plate 8 is hinged to the lifting part of the lifting rail 72, so that the lifting rail 72 can drive the rear tail plate 8 to perform vertical lifting movement in the vertical direction to meet the use requirements. At the same time, the rear tail plate 8 can be flipped on the lifting rail 72 to open or close the rear tail plate 8. In addition, the other end of the rear tail plate 8 is connected to the other end of the pull rope 38, and the rear tail plate 8 is flipped up or down by pulling up or loosening the pull rope 38, thereby closing or opening the rear tail plate 8, so that the opening or closing of the rear tail plate 8 is controlled by the self-preloaded winch.

[0047] Specifically, a tensioning chain 81 is arranged between the lifting rail 72 and the rear tail plate 8. At this time, the two ends of the tensioning chain 81 are respectively hinged to the lifting part of the lifting rail 72 and the rear tail plate 8, and when the rear tail plate 8 is unfolded to the extreme position, the tensioning chain 81 is straightened, and the rear tail plate 8 is tightened by the tensioning chain 81 to achieve load-bearing, that is, the load-bearing of the rear tail plate 8 is achieved by the tensioning chain 81, and the opening or closing of the rear tail plate 8 is achieved by the pull rope 38, thereby realizing the split arrangement of the opening and closing structure and the load-bearing structure of the rear tail plate 8, thereby improving the load-bearing capacity of the rear tail plate 8.

[0048] Figure 5 FIG. 9 is a structural diagram of a top door assembly 9 of a vertically lifting automobile tailgate using a self-pretensioning winch according to the present invention. Figure 4 and Figure 5 As shown, a top door assembly 9 is also provided on the vehicle body and above the rear tail plate 8. At this time, the top door assembly 9 includes a top plate 91, a top door 92, a turn pin 93, a torsion spring 94 and a top door pull rope 95. One end of the top plate 91 is fixed to the vehicle body, and one side of the top door 92 is hinged to the top plate 91 through the turn pin 93, so that the top door 92 can be installed on the vehicle body through the top plate 91, and the top door 92 can also be turned on the top plate 91 to open or close the top door 92. At this time, the torsion spring is sleeved outside the turn pin 93 and the two ends are respectively against the top plate 91 and the top door 92, and the direction in which the torsion spring 94 releases its elastic performance is the direction in which the top door 92 turns up, so that when the top door 92 needs to be opened, the torsion spring 94 can provide power for the top door 92 to turn up, and also provide support for maintaining the top door 92 in the turned-up state. In addition, one end of a top door pull rope 95 is connected to the other end of the top plate 91, and the other end of the top door pull rope 95 is wound around the auxiliary turntable 6, that is, when the auxiliary turntable 6 rotates, the top door pull rope 95 can be retracted and released. When the top door pull rope 95 is relaxed, the top door 92 can be flipped up and opened under the action of the torsion spring 94. When the top door pull rope 95 is retracted, the top door 92 can overcome the torque of the torsion spring 94 and flip down under the action of the top door pull rope 95, thereby closing the top door 92.

[0049] More specifically, the torsion of the torsion spring 94 is set to be greater than the gravity of the top door 92, so that the torsion of the torsion spring 94 can drive the top door 92 to flip up and maintain the flipped-up state of the top door 92. In addition, the sum of the pulling force of the auxiliary turntable 6 on the top door pull rope 95 and the gravity of the top door 92 is set to be greater than the torsion of the torsion spring 94, so that when the auxiliary turntable 6 retracts the top door pull rope 95, the sum of the pulling force of the top door pull rope 95 and the self-weight of the top door 92 can offset and exceed the torsion of the torsion spring 94, thereby realizing the flip-down closure of the top door 92.

[0050] In addition, the wheel diameters of the auxiliary turntable 6 and the main turntable 4 are arranged in proportion, so that when the main turntable 4 and the auxiliary turntable 6 are driven to rotate by the output shaft 37, the length of the main turntable 4 releasing or tightening the pull rope 38 is arranged in proportion to the length of the auxiliary turntable 6 releasing or tightening the top door pull rope 95, and the ratio of the two is the ratio of the sum of the changes in the length of the pull rope 38 when the rear tail plate 8 is flipped and lowered to the change in the length of the top door pull rope 95 when the top door 92 is flipped, ensuring that the top door 92 can be opened synchronously when the rear tail plate 8 is opened and the retractable drive 2 drives the coil spring 5 to rotate to the relaxation limit state, and the top door 92 can be closed synchronously after the rear tail plate 8 is closed, thereby ensuring the uniformity of the action.

[0051] More specifically, the retractable and extendable driver 2 is an electric motor, and the telescopic driver 73 is an electric push rod, which realizes the electric control of the self-preloaded winch and the vertical lifting tailgate of the automobile using it. The wiring is simple, and the retractable and extendable driver 2 and the telescopic driver 73 are relatively fixedly installed on the vehicle body and will not move with the opening or closing of the rear tailgate 8, thereby avoiding the problem of dragging of the power supply line when the vertical lifting tailgate of the automobile is in motion, avoiding wear and extending the service life.

[0052] The self-preloaded winch and the vertical lift tailgate of a car using the same provided in the present embodiment include a mounting frame 1, a retractable drive 2, a reducer 3, a main turntable 4 and a coil spring 5, and the self-preloaded winch is used to retract and release a pull rope 38, and the vertical lift tailgate of the car is opened and closed by the pull rope 38. In addition, the retractable drive 2 outputs power to the reducer 3, and the main turntable 4 is rotatably installed on the output shaft 37 of the reducer 3, and a coil spring 5 is arranged between the output shaft 37 and the main turntable 4 for transmission, and the main turntable is relative to the output shaft by rotating and tightening or anti-rotating and loosening the coil spring 5. 37 rotates, so that when the rear tail plate 8 is raised and lowered after being unfolded, the main wheel disc continues to rotate relative to the output shaft 37 through the reverse rotation and rotation tightening of the coil spring 5 when the output shaft 37 is stationary, so that when the pull rope 38 is relaxed due to the raising of the rear tail plate 8 and the pull rope 38 needs to be further released due to the lowering of the rear tail plate 8, the pull rope 38 can be in a pre-tightened state, thereby meeting the need to continue to release the pull rope 38 due to the lowering of the rear tail plate 8, so that the pull rope 38 can always maintain a pre-tightened state, which not only maintains cleanliness but also ensures the normal use of the vertically lifting car tail plate.

[0053] The above are only preferred embodiments of the present invention, and do not limit the implementation mode and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A self-preloaded winch, characterized in that: include: A mounting frame, one side of which is fixedly mounted on the vehicle body; A retractable driver, the retractable driver being mounted on the mounting frame; A reducer, the input shaft of which is connected to the retractable drive. A main rotating disk, the main rotating disk is rotatably mounted on the output shaft of the reducer, and one end of a pull rope is wound around the main rotating disk; A secondary rotating disk, the secondary rotating disk is sleeved on the output shaft; A coil spring is wound around the output shaft of the reducer, and an inner ring end of the coil spring is fixed to the outside of the output shaft, and an outer ring end of the coil spring is fixed to the main turntable.

2. The self-prestressing winch according to claim 1, characterized in that: The reducer includes a reduction gear box, a worm, a worm wheel, a worm wheel shaft, a pinion gear and a large gear. The reduction gear box is installed on the mounting frame. The worm is rotatably installed on the reduction gear box and one end of the worm is connected to the retractable drive as the input shaft. The worm wheel shaft is rotatably installed in the reduction gear box and is sleeved with the worm wheel, and the worm wheel is meshed with the worm. The pinion gear is also sleeved on the worm wheel shaft. At the same time, the output shaft is rotatably installed in the reduction gear box and is sleeved with the large gear, and the large gear is meshed with the pinion gear.

3. The self-prestressing winch according to claim 1, characterized in that: The main turntable includes a disk-shaped cavity, a turntable cover is arranged at the cavity opening of the disk-shaped cavity, and the coil spring is installed in the disk-shaped cavity.

4. The self-prestressing winch according to claim 3, characterized in that: The inner ring end of the coil spring is bent to form a clamping head, and the outer ring end of the coil spring is bent to form a hook. A clamping groove matching the clamping head is provided on the outer wall of the output shaft, and a groove corresponding to the hook is provided on the main turntable.

5. The self-prestressing winch according to claim 2, characterized in that: The pinion gears and the large gears are each provided with two groups, and the two groups of pinion gears are meshed with the two groups of large gears in a one-to-one correspondence.

6. A vertical lifting tailgate for automobiles, characterized in that: The self-prestressing winch according to any one of claims 1 to 5 is used, further comprising: A lifting assembly, the lifting assembly is arranged below the self-preloaded winch, the lifting assembly includes a lifting bracket, a lifting rail, a telescopic driver, a pulley and a sliding belt, the lifting bracket is fixedly mounted on the vehicle body, the lifting rail and the telescopic driver are both mounted on the lifting bracket and both perform lifting motion in the vertical direction, the driving shaft of the telescopic driver is arranged vertically upward and rotatably mounted with the pulley, one end of the sliding belt is fixedly connected to the vehicle body or the lifting bracket, and the other end of the sliding belt is connected to the lifting portion of the lifting rail after passing around the pulley; A rear tail plate, one end of which is hinged to the lifting portion of the lifting rail, and the other end of which is connected to the other end of the pull rope; A tension chain, wherein two ends of the tension chain are respectively hinged to the lifting portion of the lifting rail and the rear tail plate.

7. The vertical lifting automobile tailgate according to claim 6, characterized in that: It also includes a top door assembly, which includes a top plate, a top door, a turn pin, a torsion spring and a top door pull rope, one end of the top plate is fixed to the vehicle body, one side of the top door is hinged to the top plate through the turn pin, the torsion spring is sleeved outside the turn pin and its two ends respectively abut against the top plate and the top door, one end of the top door pull rope is connected to the other end of the top plate, and the other end of the top door pull rope is wound around the auxiliary turntable.

8. The vertical lifting automobile tailgate according to claim 7, characterized in that: The torsion force of the torsion spring is greater than the gravity of the top door, and the sum of the pulling force of the auxiliary turntable on the top door pull rope and the gravity of the top door is greater than the torsion force of the torsion spring.

9. The vertical lifting automobile tailgate according to claim 6, characterized in that: The retractable and retractable driver is an electric motor, and the telescopic driver is an electric push rod.

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