Double-bearing electric tail door supporting rod

Abstract

The utility model discloses a double-bearing electric tail door supporting rod which comprises a metal motor sleeve and a connecting mechanism arranged in the metal motor sleeve, and the connecting mechanism comprises an output assembly, a buffering assembly and a lifting assembly. The output assembly comprises a stepping motor and a planetary gearbox, the buffer tank assembly comprises an alloy damper, a first bearing and a second bearing, and the lifting assembly comprises a lead screw, a lifting rod and a damping spring; when the lifting device works, the first bearing and the second bearing are arranged at an interval, so that the lead screw is provided with a plurality of supporting points, the coaxiality of the stepping motor and the lead screw is effectively guaranteed, and the situation that the service life is affected due to deformation of the lifting rod is avoided; the fixed gasket transmits pressure to the damping meson and the transmission gasket, the pressure is converted into a damping value capable of being adjusted in a variable mode, the resistance can be adjusted only by rotating the damping screw, the structure is simple, and operation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile tailgates, in particular to a double-bearing electric tailgate support rod. Background Art

[0002] With the rapid development of automotive electronic technology, the comfort and richness of vehicle functions are increasing day by day. As a convenient device for opening and closing the tailgate, the electric tailgate support rod of the car not only brings convenience to people's lives, but also faces the urgent needs of comfort, safety and stability. In the prior art, the tailgate support rod generally does not have a damping structure, which makes the motor difficult to control. The tail box shakes during the rising and falling process, or it cannot be closed tightly. The resistance encountered during the movement of the product is not easy to control, resulting in the same tailgate support rod being unable to adapt to the different realities of the tailgate loads of multiple different cars, which is not conducive to the full utilization of resources. In addition, the tailgate cannot stop at any position when opening and closing to meet different opening heights. The electric support rods on the market currently use a motor plus a single bearing to drive the screw rod to work. This structure has very high coaxiality requirements when assembling the bearing and the screw rod, especially for the support rod with a large stroke. The deformation of the support rod during operation will affect the service life of the motor gearbox.

[0003] For example, the application number CN212154499U discloses an electric tailgate support rod, including a support rod body, a first ball head fixedly connected to the bottom of the support rod body, a second ball head fixedly connected to the top of the output end of the support rod body, a limit plate sleeved on the surface of the support rod body, a first sleeve sleeved on the surface of the support rod body and located at the top of the limit plate, a second sleeve sleeved on the surface of the output end of the support rod body, the bottom of the second sleeve is fixedly connected to the first sleeve, hand wheels are arranged on both sides of the second sleeve, and threaded rods are fixedly connected to the opposite sides of the two hand wheels. The utility model solves the problem of low safety of the existing electric tailgate support rods by arranging a support rod body, a first ball head, a second ball head, a limit plate, a first sleeve, a second sleeve, a hand wheel, a threaded rod, a limit box, a pull rod, a pull plate, a connecting rod, a spring, a clamping block and a clamping slot. The electric tailgate support rod has the advantage of high safety and is worthy of promotion.

[0004] However, when the electric tailgate support rod is in use, the coaxiality of the motor and the screw rod cannot be guaranteed. The support rod is prone to deformation during operation, which affects the service life of the motor gearbox. It has no damping structure, which makes the motor difficult to control. The tail box is prone to shaking or not closing tightly during the rising and falling process, which does not meet people's usage needs. Therefore, a double-bearing electric tailgate support rod is needed. Utility Model Content

[0005] In order to solve the defects in the prior art that the coaxiality of the motor and the lead screw cannot be guaranteed, the support rod is easy to deform and affects the service life, and the lack of a damping structure causes the tail box to shake easily, the utility model provides a double-bearing electric tailgate support rod.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0007] The utility model discloses a double-bearing electric tailgate support rod, comprising a metal motor sleeve and a connecting mechanism arranged inside the metal motor sleeve, wherein the connecting mechanism comprises an output assembly, a buffer assembly and a lifting assembly;

[0008] The output assembly includes a first ball head, a circuit board, a stepper motor, a rotating gear, a planetary gear transmission, an output gear and a motor limit frame, the bottom of the metal motor sleeve is welded with a first ball head, and the inner bottom of the metal motor sleeve is fixedly installed with a circuit board, a stepper motor is arranged above the circuit board, a rotating gear is fixedly installed at the output end of the stepper motor, a planetary gear transmission is arranged at one end of the stepper motor away from the circuit board, the rotating gear is rotatably connected with the input end of the planetary gear transmission through gear meshing, an output gear is fixedly installed at the output end of the planetary gear transmission, and a motor limit frame is arranged on the upper surface wall of the planetary gear transmission;

[0009] The buffer assembly includes an alloy damper, a damping cover, a damping screw, a fixed gasket, a spring damper, a damping meson, a transmission gasket, a first bearing and a second bearing. The alloy damper is arranged above the planetary gear transmission box, the damping cover is fixedly installed at the bottom of the alloy damper, the damping screw is arranged on the upper surface wall inside the damping cover, the damping screw is fixedly installed at one end away from the damping cover, a fixed gasket is arranged between the damping screw and the fixed gasket, the damping meson is attached to one end of the fixed gasket away from the damping screw, the transmission gasket is attached to one end of the damping meson away from the fixed gasket, the first bearing is embedded at the bottom of the damping cover, and the second bearing is fixedly installed on the upper surface wall of the alloy damper;

[0010] The lifting assembly includes a stabilizing nut, a sealing gasket, a rotating joint, a screw, a lifting rod, an outer tube, a damping spring and a second ball head. A stabilizing nut is provided at one end of the second bearing away from the alloy damper. A sealing gasket is provided on the lower surface wall of the stabilizing nut. The rotating joint welded on the lower surface wall of the stabilizing nut passes through the sealing gasket. A screw is fixedly installed on the upper surface wall of the stabilizing nut. The screw is rotatably connected to the lifting rod through threaded engagement. One end of the lifting rod away from the stabilizing nut is welded to the inside of the outer tube. A damping spring is sleeved on the lifting rod, and a second ball head is welded on the top of the outer tube.

[0011] As a preferred technical solution of the utility model, a buffer pad is provided at the bottom of the stepper motor, and a sound-absorbing cotton is installed on the outer side wall of the stepper motor.

[0012] As a preferred technical solution of the utility model, the fixed gaskets, damping mesons and transmission gaskets are each provided in four groups, and the four groups of the fixed gaskets, damping mesons and transmission gaskets are evenly distributed inside the alloy damper.

[0013] As a preferred technical solution of the present utility model, the inner diameter of the first bearing is the same as the diameter of the screw rod, and the inner diameter of the second bearing is the same as the diameter of the screw rod.

[0014] As a preferred technical solution of the utility model, the rotary joint passes through the alloy damper and is rotationally connected with the output gear through gear meshing.

[0015] As a preferred technical solution of the utility model, the diameters of the stepper motor, the planetary gear transmission and the alloy damper are completely the same as the inner diameter of the metal motor casing.

[0016] The utility model has the following beneficial effects:

[0017] By setting the first bearing and the second bearing, when working, the first bearing and the second bearing are spaced apart, and the first bearing and the second bearing are fixed to the metal motor sleeve, so that the screw rod has multiple support points, avoiding the screw rod from tilting due to the single support point lever structure formed by sleeved single bearing, effectively ensuring the coaxiality of the stepping motor and the screw rod, and avoiding the deformation of the lifting rod during work to affect the service life of the planetary gear transmission;

[0018] By setting alloy damper, damping screw, fixed gasket, spring damper, damping meson and transmission gasket, the rotary joint reduces the vibration generated during the rotation of the gear through the alloy damper during the rotation process. The fixed gasket inside the alloy damper is stationary and fixed in the alloy damper, and the transmission gasket is in a rotating state in the alloy damper. The damping screw on the alloy damper moves downward, pressing the spring damper, so that the spring damper produces a downward pressure. The spring damper is installed between the damping screw and the fixed gasket, forcing the spring damper to transmit the pressure to the fixed gasket. The fixed gasket transmits the pressure to the damping meson and the transmission gasket, so that the transmission gasket runs and rotates. This pressure is converted into a variable adjustable damping value. When the gear rotates to transmit, this variable adjustable damping value acts as an adjustable load. The resistance of the alloy damper can be adjusted by rotating the damping screw by hand. The structure is simple and easy to operate. It is suitable for the needs of different models and improves the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1It is a structural schematic diagram of a double-bearing electric tailgate support rod of the utility model;

[0020] Figure 2 It is a half-section structural schematic diagram of a double-bearing electric tailgate support rod of the utility model;

[0021] Figure 3 It is a schematic diagram of the internal explosion structure of a metal motor sleeve of a double-bearing electric tailgate support rod of the utility model;

[0022] Figure 4 It is a schematic diagram of the internal explosion structure of a double-bearing electric tailgate strut alloy damper of the utility model;

[0023] Figure 5 The utility model is a half-section structural schematic diagram of a double-bearing electric tailgate support rod lifting assembly.

[0024] In the figure: 1. Metal motor sleeve; 2. First ball head; 3. Circuit board; 4. Stepper motor; 5. Rotating gear; 6. Planetary gear box; 7. Output gear; 8. Motor limit frame; 9. Alloy damper; 10. Damping cover; 11. Damping screw; 12. Fixing gasket; 13. Spring damping; 14. Damping meson; 15. Transmission gasket; 16. First bearing; 17. Second bearing; 18. Stabilizing nut; 19. Sealing gasket; 20. Rotary joint; 21. Screw; 22. Lifting rod; 23. Outer tube; 24. Damping spring; 25. Second ball head; 26. Buffer pad; 27. Silencing cotton. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. Example 1

[0026] like Figure 1-5 As shown, the utility model proposes a dual-bearing electric tailgate support rod, comprising a metal motor sleeve 1 and a connecting mechanism arranged inside the metal motor sleeve 1, wherein the connecting mechanism comprises an output assembly, a buffer assembly and a lifting assembly;

[0027] The output assembly includes a first ball head 2, a circuit board 3, a stepper motor 4, a rotating gear 5, a planetary gearbox 6, an output gear 7 and a motor limit frame 8. The first ball head 2 is welded to the bottom of the metal motor sleeve 1, and the circuit board 3 is fixedly installed on the inner bottom of the metal motor sleeve 1. The stepper motor 4 is arranged above the circuit board 3. The output end of the stepper motor 4 is fixedly installed with a rotating gear 5. The end of the stepper motor 4 away from the circuit board 3 is provided with a planetary gearbox 6. The rotating gear 5 is connected to the input end of the planetary gearbox 6 through gear meshing rotation. The output end of the planetary gearbox 6 is fixedly installed. An output gear 7 is installed, and a motor limit frame 8 is provided on the upper surface wall of the planetary gear transmission 6. When working, the tailgate support rod is first fixedly installed on the tailgate of the car through the first ball head 2 and the second ball head 25. When the tailgate of the car needs to be opened, the circuit board 3 receives and transmits the signal, and the stepper motor 4 starts to work, driving the rotating gear 5 on the main shaft to rotate. The rotating gear 5 drives the internal gear of the planetary gear transmission 6 to follow the rotation through gear meshing. The planetary gear transmission 6 reduces the speed and drives the rotating joint 20 to rotate through the output gear 7. The motor limit frame 8 can ensure that the stepper motor 4 is firmly fixed and does not shake;

[0028] The buffer assembly includes an alloy damper 9, a damping cover 10, a damping screw 11, a fixed gasket 12, a spring damper 13, a damping meson 14, a transmission gasket 15, a first bearing 16 and a second bearing 17. The alloy damper 9 is arranged above the planetary gear box 6, and the damping cover 10 is fixedly installed at the bottom of the alloy damper 9. The damping screw 11 is arranged on the upper surface wall inside the damping cover 10, and the fixed gasket 12 is fixedly installed at one end of the damping screw 11 away from the damping cover 10. A spring damper 13 is arranged between the damping screw 11 and the fixed gasket 12. The end of the fixed gasket 12 away from the damping screw 11 is fitted with a damping meson 14, and the end of the damping meson 14 away from the fixed gasket 12 is fitted with a transmission gasket 15. The bottom of the damping cover 10 is embedded with a first bearing 16, and the upper surface wall of the alloy damper 9 is fixedly installed with a second bearing 17. During operation, the rotary joint 20 reduces the vibration generated during the rotation of the gear through the alloy damper 9 during rotation. The fixed gasket 12 inside the alloy damper 9 is stationary and fixed in the alloy damper 9, and the transmission gasket 15 is in a rotating state in the alloy damper 9. The damping screw 11 on the alloy damper 9 moves downward, compressing the spring damper 13, so that the spring damper 13 generates a downward pressure. The spring damper 13 is installed between the damping screw 11 and the fixed gasket 12, forcing the spring damper 13 to transmit the pressure downward to the fixed gasket 12. The fixed gasket 12 transmits the pressure to the damping meson 14 and the transmission gasket 15, so that the transmission gasket 15 rotates. This pressure is converted into a variable adjustable damping value. When the gear rotates to transmit, this variable adjustable damping value acts as an adjustable load. The resistance of the alloy damper 9 can be adjusted by rotating the damping screw 11 by hand. The structure is simple and easy to operate. It is suitable for the needs of different models and improves the service life of the equipment.

[0029] Furthermore, a buffer pad 26 is provided at the bottom of the stepper motor 4, and a sound-absorbing cotton 27 is installed on the outer wall of the stepper motor 4. When working, by providing the buffer pad 26 and the sound-absorbing cotton 27, the buffer pad 26 is conducive to reducing the vibration generated by the stepper motor 4, reducing the vibration of the metal motor sleeve 1, and extending the service life. The sound-absorbing cotton 27 is conducive to silencing the stepper motor 4, reducing the noise generated by the operation of the stepper motor 4, and realizing the control operation of shock absorption and sound absorption.

[0030] Furthermore, four groups of fixed gaskets 12, damping mesons 14 and transmission gaskets 15 are arranged, and the four groups of fixed gaskets 12, damping mesons 14 and transmission gaskets 15 are evenly distributed inside the alloy damper 9. When working, by setting four groups of fixed gaskets 12, damping mesons 14 and transmission gaskets 15, the alloy damper 9 can also effectively reduce the vibration generated by the rotation of the gears, reduce the noise of the operation of the components, make the various components of the equipment operate normally, and improve the service life of the equipment.

[0031] Furthermore, the inner diameter of the first bearing 16 is the same as the diameter of the screw rod 21, and the inner diameter of the second bearing 17 is the same as the diameter of the screw rod 21. During operation, by setting the first bearing 16 and the second bearing 17, the first bearing 16 and the second bearing 17 are spaced apart, so that the screw rod 21 has multiple support points, thereby avoiding the screw rod 21 from tilting due to the single support point lever structure formed by the single bearing, effectively ensuring the coaxiality of the stepping motor 4 and the screw rod 21, and avoiding the deformation of the lifting rod 22 during operation to affect the service life of the planetary gear transmission 6.

[0032] Furthermore, the diameters of the stepper motor 4, the planetary gear transmission 6 and the alloy damper 9 are exactly the same as the inner diameter of the metal motor casing 1. When working, the diameters of the stepper motor 4, the planetary gear transmission 6 and the alloy damper 9 are exactly the same, which is conducive to the stable installation of the stepper motor 4, the planetary gear transmission 6 and the alloy damper 9 inside the metal motor casing 1, realizing a secure and non-shaking control operation. Example 2

[0033] like Figure 1-5 As shown, a dual-bearing electric tailgate support rod proposed by the utility model, compared with Example 1, as another implementation of the utility model, the lifting assembly includes a stabilizing nut 18, a sealing gasket 19, a rotating joint 20, a screw 21, a lifting rod 22, an outer tube 23, a damping spring 24 and a second ball head 25, and a stabilizing nut 18 is arranged at one end of the second bearing 17 away from the alloy damper 9, and a sealing gasket 19 is arranged on the lower surface wall of the stabilizing nut 18. The rotating joint 20 welded on the lower surface wall of the stabilizing nut 18 passes through the sealing gasket 19, and a screw 21 is fixedly installed on the upper surface wall of the stabilizing nut 18. The screw 2 The lifting rod 22 is connected to the lifting rod 22 by threaded engagement and rotation. One end of the lifting rod 22 away from the stabilizing nut 18 is welded inside the outer tube 23. A damping spring 24 is sleeved on the lifting rod 22. A second ball head 25 is welded on the top of the outer tube 23. When working, the rotary joint 20 drives the stabilizing nut 18 on the top to rotate, and the screw rod 21 on the top of the stabilizing nut 18 rotates, driving the lifting rod 22 to move upward. The lifting rod 22 drives the tailgate through the second ball head 25 to realize the electric opening and closing operation. The damping spring 24 sleeved on the outside of the lifting rod 22 contracts and pulls the outer tube 23 to realize the rapid closing of the tailgate, which is convenient and quick.

[0034] Furthermore, the rotary joint 20 passes through the alloy damper 9 and is rotatably connected to the output gear 7 through gear meshing. During operation, the output gear 7 fixed at the output end of the planetary gear box 6 drives the rotary joint 20 to rotate through threaded engagement. During the rotation of the rotary joint 20, the screw rod 21 is further driven to rotate. The rotary joint 20 passes through the alloy damper 9 to ensure coaxiality, and the rotation of the screw rod 21 is more stable.

[0035] During operation, the tailgate support rod is first fixed on the tailgate of the car through the first ball head 2 and the second ball head 25. When the tailgate of the car needs to be opened, the circuit board 3 receives and transmits the signal, and the stepper motor 4 starts to work, driving the rotating gear 5 on the main shaft to rotate. The rotating gear 5 drives the internal gear of the planetary gear box 6 to follow the rotation through gear meshing. The planetary gear box 6 reduces the speed and drives the rotary joint 20 to rotate through the output gear 7.

[0036] Next, the rotary joint 20 reduces the vibration generated during the rotation of the gear through the alloy damper 9. The fixed gasket 12 inside the alloy damper 9 is stationary and fixed inside the alloy damper 9, and the transmission gasket 15 is in a rotating state inside the alloy damper 9. The damping screw 11 on the alloy damper 9 moves downward, pressing the spring damper 13, so that the spring damper 13 generates a downward pressure. The spring damper 13 is installed between the damping screw 11 and the fixed gasket 12, forcing the spring damper 13 to transmit the pressure to the fixed gasket 12. The fixed gasket 12 transmits the pressure to the damping meson 14 and the transmission gasket 15, so that the transmission gasket 15 runs and rotates. This pressure is converted into a variable adjustable damping value. When the gear rotates to transmit, this variable adjustable damping value acts as an adjustable load. The resistance of the alloy damper 9 can be adjusted by rotating the damping screw 11 by hand. The structure is simple and easy to operate, suitable for the needs of different models, and improves the service life of the equipment.

[0037] Finally, the rotary joint 20 drives the stabilizing nut 18 on the top to rotate, and the screw rod 21 on the top of the stabilizing nut 18 rotates, driving the lifting rod 22 to move upward, and the lifting rod 22 drives the tailgate through the second ball head 25 to realize the electric switch operation, and the damping spring 24 sleeved on the outside of the lifting rod 22 contracts and pulls the outer tube 23 to realize the rapid closing of the tailgate, which is convenient and quick.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A dual-bearing electric tailgate support rod, comprising a metal motor sleeve (1) and a connecting mechanism arranged inside the metal motor sleeve (1), characterized in that: The connecting mechanism includes an output assembly, a buffer assembly and a lifting assembly; The output assembly comprises a first ball head (2), a circuit board (3), a stepper motor (4), a rotating gear (5), a planetary gear transmission (6), an output gear (7) and a motor limit frame (8); the first ball head (2) is welded to the bottom of the metal motor sleeve (1), and the circuit board (3) is fixedly mounted on the inner bottom of the metal motor sleeve (1); the stepper motor (4) is arranged above the circuit board (3); the output end of the stepper motor (4) is fixedly mounted with a rotating gear (5); the end of the stepper motor (4) away from the circuit board (3) is provided with a planetary gear transmission (6); the rotating gear (5) is rotationally connected to the input end of the planetary gear transmission (6) through gear meshing; the output end of the planetary gear transmission (6) is fixedly mounted with an output gear (7); and the upper surface wall of the planetary gear transmission (6) is provided with a motor limit frame (8); The buffer assembly comprises an alloy damper (9), a damping cover (10), a damping screw (11), a fixing gasket (12), a spring damper (13), a damping meson (14), a transmission gasket (15), a first bearing (16) and a second bearing (17); the alloy damper (9) is arranged above the planetary gear transmission (6); the damping cover (10) is fixedly mounted on the bottom of the alloy damper (9); the damping screw (11) is arranged on the upper surface wall inside the damping cover (10); the damping screw (11) is remotely A fixing gasket (12) is fixedly mounted at one end away from the damping cover (10), a spring damper (13) is arranged between the damping screw (11) and the fixing gasket (12), a damping pion (14) is attached to one end of the fixing gasket (12) away from the damping screw (11), a transmission gasket (15) is attached to one end of the damping pion (14) away from the fixing gasket (12), a first bearing (16) is embedded at the bottom of the damping cover (10), and a second bearing (17) is fixedly mounted on the upper surface wall of the alloy damper (9); The lifting assembly comprises a stabilizing nut (18), a sealing gasket (19), a rotating joint (20), a screw (21), a lifting rod (22), an outer tube (23), a damping spring (24) and a second ball head (25); a stabilizing nut (18) is provided at one end of the second bearing (17) away from the alloy damper (9); a sealing gasket (19) is provided on the lower surface wall of the stabilizing nut (18); a rotating joint (20) welded to the lower surface wall of the stabilizing nut (18) penetrates the sealing gasket (19); a screw (21) is fixedly mounted on the upper surface wall of the stabilizing nut (18); the screw (21) is rotatably connected to the lifting rod (22) through threaded engagement; an end of the lifting rod (22) away from the stabilizing nut (18) is welded to the inside of the outer tube (23); a damping spring (24) is sleeved on the lifting rod (22); and a second ball head (25) is welded on the top of the outer tube (23).

2. The double-bearing electric tailgate support rod according to claim 1, characterized in that: A buffer pad (26) is provided at the bottom of the stepper motor (4), and a sound-absorbing cotton (27) is installed on the outer side wall of the stepper motor (4).

3. The double-bearing electric tailgate support rod according to claim 1, characterized in that: The fixed gasket (12), the damping meson (14) and the transmission gasket (15) are each provided in four groups, and the four groups of the fixed gasket (12), the damping meson (14) and the transmission gasket (15) are evenly distributed inside the alloy damper (9).

4. The dual-bearing electric tailgate support rod according to claim 1, characterized in that: The inner diameter of the first bearing (16) is the same as the diameter of the screw rod (21), and the inner diameter of the second bearing (17) is the same as the diameter of the screw rod (21).

5. The double-bearing electric tailgate support rod according to claim 1, characterized in that: The rotary joint (20) passes through the alloy damper (9) and is rotationally connected to the output gear (7) through gear meshing.

6. The dual-bearing electric tailgate support rod according to claim 1, characterized in that: The diameters of the stepper motor (4), the planetary gear box (6) and the alloy damper (9) are completely the same as the inner diameter of the metal motor sleeve (1).

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