CN111101804A

CN111101804A - Electric push rod of automobile tail door

Info

Publication number: CN111101804A
Application number: CN201811263918.XA
Authority: CN
Inventors: 王万青
Original assignee: Yangzhou Xinya Automotive Electronics Technology Co ltd
Current assignee: Yangzhou Xinya Automotive Electronics Technology Co ltd
Priority date: 2018-10-29
Filing date: 2018-10-29
Publication date: 2020-05-05

Abstract

An electric push rod of a tail door of an automobile. Relates to the field of automobile spare and accessory parts. The electric push rod of the automobile tail door has the advantages that the structure is exquisite, the stability is good, the service life is long, the problem that the screw rod is damaged or bent due to the fact that the radial component force exerted on the screw rod by the gravity of the tail door is too large can be effectively solved, the screw rod is effectively protected, and therefore the actual using effect of the electric push rod is effectively guaranteed. Including fixed subassembly and movable assembly, fixed subassembly includes fixed sleeve, motor, speed reducer, fixing base, screw rod, solid fixed ring, unload power ring sum a plurality of connecting rod, still be equipped with the spring in the fixed sleeve, the spring free sleeve movable sleeve, just support between connecting block and fixing base. The cross section of the sliding hole is in a key groove shape arranged along the radial direction of the screw rod. The invention has the advantages of exquisite structure, good stability, long service life, good effect of resisting radial component force and difficult damage of the screw rod on the whole.

Description

Electric push rod of automobile tail door

Technical Field

The invention relates to the field of automobile parts.

Background

At present, electric putter among the prior art mainly by the fixed sleeve, the movable sleeve, including a motor, an end cap, a controller, and a cover plate, the screw rod, nut and solid fixed ring are constituteed, wherein motor and screw rod are connected, and locate within the fixed sleeve, the screw rod is cup jointed to the nut, and with screw rod threaded connection, gu fixed ring's inner wall fixed connection is in the end department that the motor was kept away from to the screw rod, the movable sleeve cup joints nut and solid fixed ring, and the free screw rod, movable sleeve and nut fixed connection, and with gu fixed ring sliding connection, the movable sleeve still outer fixedly connected with and the fixed sleeve outer wall sliding connection's of outer wall movable shell that goes back, like this, when the motor is opened, can order about fixed.

However, in practical use, it is found that when the electric push rod is applied to a tail gate of an automobile, two ends of the electric push rod are respectively hinged to the tail gate and an automobile body, and when the gravity of the tail gate is applied to the electric push rod, a certain included angle is formed between the gravity of the tail gate and the axis of the electric push rod, so that the movable sleeve applies a certain radial component force to the screw rod. Specifically, the screw rod is provided with two stress positions, one is a fixing ring, and the other is a nut; therefore, the movable sleeve forms a lever, as shown in fig. 6, that is, a force applying arm is formed between the end of the movable sleeve far away from the fixed sleeve and the fixed ring, and a force receiving arm is formed between the fixed ring and the nut, and as the opening degree of the tail gate becomes larger, the distance between the fixed ring and the nut becomes smaller; the force applying arm is lengthened, the force bearing arm is reduced, so that the radial component force on the screw rod is increased, the screw rod is easy to break down or even bend and deform after being used for a long time, and the normal use of the electric push rod is greatly influenced.

Disclosure of Invention

Aiming at the problems, the invention provides the electric push rod of the automobile tail gate, which has the advantages of exquisite structure, good stability and long service life, can effectively avoid the problem of damage or bending of the screw rod caused by overlarge radial component force applied to the screw rod by the gravity of the tail gate, effectively protects the screw rod and further effectively ensures the actual using effect of the electric push rod.

The technical scheme of the invention is as follows: the motor, the speed reducer and the fixing seat are fixedly connected in the fixing sleeve, the speed reducer is connected with an output shaft of the motor, one end of the screw penetrates into the fixing seat and is connected with the speed reducer, so that the screw is driven by the motor to rotate, the inner wall of the fixing ring is fixedly connected to the end, away from the motor, of the screw, the connecting rods are arranged in parallel to the screw, one ends of the connecting rods are fixedly connected to the end face of the fixing seat, and the force unloading ring is sleeved on the screw in an empty mode and is fixedly connected with the end, away from the fixing seat, of the connecting rods;

the movable assembly comprises a movable shell, a movable sleeve, a nut, an inner limiting ring and an outer limiting ring, the movable shell is sleeved with the fixed sleeve and is in sliding connection with the fixed sleeve, the movable sleeve is arranged in the movable shell and is far away from the end of the fixed sleeve, the end of the movable sleeve is fixedly connected with the movable shell through a connecting block, the movable sleeve and the screw are coaxial and sleeved with the fixed ring and the force-unloading ring, the inner limiting ring and the outer limiting ring are sleeved in a uniform mode, the screw and the outer wall of the screw are fixedly connected to the inner wall of one side, facing the motor, of the movable sleeve, the nut is sleeved with the screw and in threaded connection with the screw, two sides of the nut are supported on the inner limiting ring and the outer limiting ring respectively, and a plurality of sliding holes matched with the connecting rods are formed in.

Still be equipped with the spring in the fixed sleeve, the spring free sleeve activity sleeve just supports between connecting block and fixing base.

The cross section of the sliding hole is in a key groove shape arranged along the radial direction of the screw rod.

In the invention, the nut is not in direct contact with the movable sleeve, so that the acting force applied to the movable sleeve is not transferred to the screw rod through the nut but is transferred to the fixed seat with a more stable structure through the connecting rod, and meanwhile, the force-applied arm in the lever is changed into the connecting rod with a fixed length, thereby obviously reducing the damage of the radial acting force to the screw rod, effectively protecting the screw rod and further effectively ensuring the actual using effect of the electric push rod. The novel screw rod has the advantages of exquisite structure, good stability, long service life, good radial component force resistance effect and difficulty in damaging the screw rod on the whole.

Drawings

FIG. 1 is a schematic structural diagram of the present application,

figure 2 is an enlarged view of a portion of figure 1 at a,

figure 3 is an enlarged view of a portion of figure 1 at B,

figure 4 is a cross-sectional view taken along line C-C of figure 1,

figure 5 is a schematic view of an optimized embodiment of the slide hole in the present case,

FIG. 6 is a schematic diagram of the background art of the present disclosure;

in the figure, 11 is a fixed sleeve, 12 is a motor, 13 is a speed reducer, 14 is a fixed seat, 15 is a screw rod, 16 is a fixed ring, 17 is a force-releasing ring, and 18 is a connecting rod;

21 is a movable shell, 22 is a movable sleeve, 23 is a nut, 230 is a sliding hole, 24 is an inner limiting ring, 25 is an outer limiting ring, and 3 is a spring.

Detailed Description

The invention is shown in figures 1-5, comprising a fixed component and a movable component, wherein the fixed component comprises a fixed sleeve 11, a motor 12, a speed reducer 13, a fixed seat 14, a screw 15, a fixed ring 16, a force-removing ring 17 and a plurality of connecting rods 18, the motor 12, the speed reducer 13 and the fixed seat 14 are all fixedly connected in the fixed sleeve 11, the speed reducer 13 is connected with an output shaft of the motor 12, one end of the screw 15 penetrates into the fixed seat 14 and is connected with the speed reducer 13, so that the screw 15 rotates under the driving of the motor 12, the inner wall of the fixing ring 16 is fixedly connected with the end of the screw 15 far away from the motor 12, the connecting rods 18 are all arranged in parallel with the screw 15, one end of each connecting rod 18 is fixedly connected with the end surface of the fixing seat 14, the force unloading ring 17 is sleeved on the screw rod 15 in an empty mode and is fixedly connected with the end, far away from the fixed seat, of the connecting rod 18;

the movable component comprises a movable shell 21, a movable sleeve 22, a nut 23, an inner limit ring 24 and an outer limit ring 25, the movable shell 21 is sleeved on the fixed sleeve 11 and is connected with the fixed sleeve 11 in a sliding way, the movable sleeve 22 is arranged in the movable shell 21 and is fixedly connected with the movable shell 21 through a connecting block at the end far away from the fixed sleeve 11, the movable sleeve 22 and the screw 15 are coaxial and are sleeved with the fixed ring 16 and the force-removing ring 17, the inner limit ring 24 and the outer limit ring 25 are both sleeved on the screw 15 in an empty way, and the outer walls of the inner limit ring and the outer limit ring are both fixedly connected on the inner wall of one side of the movable sleeve 22 facing the motor 12, the nut 23 is sleeved on the screw 15 and is in threaded connection with the screw 15, two sides of the nut 23 are respectively abutted against the inner limiting ring 24 and the outer limiting ring 25, and the end face of the nut 23 is provided with a plurality of sliding holes 230 matched with the connecting rod 18. Therefore, after the motor is started, the screw rod is driven to rotate at a low speed under the action of the speed reducer, the nut and the movable sleeve are driven to translate under the action of the threads, and finally the linear relative motion of the fixed sleeve and the movable shell is realized, namely the two ends of the electric push rod are unfolded or retracted.

Wherein, because nut and movable sleeve will no longer direct contact, consequently, the effort that movable sleeve received will no longer transmit to the screw rod via the nut on, but on transmitting to the more stable fixing base of structure via the connecting rod, receive the arm of force in the lever simultaneously and will become the fixed connecting rod of length to showing and having reduced radial effort and to the damage of screw rod, effectively having protected the screw rod, and then effectively ensured electric putter's in-service use effect. The novel screw rod has the advantages of exquisite structure, good stability, long service life, good radial component force resistance effect and difficulty in damaging the screw rod on the whole.

Still be equipped with spring 3 in the fixed sleeve, spring 3 empty cover movable sleeve 22, just support between connecting block and fixing base. Like this, can bear the most pressure that electric putter received through the spring, further reduce the load of screw rod, ensure the holistic result of use of electric putter.

As shown in fig. 5, the cross section of the slide hole 230 is in the shape of a key groove arranged along the screw radial direction. Therefore, when the connecting rod is used for stopping rotation of the nut, the connecting rod is effectively prevented from transmitting radial force to the screw rod by the nut, and the connecting rod is enabled to be completely transmitted to the fixed seat after being stressed, namely the problem that the screw rod is damaged or bent due to overlarge radial force on the screw rod is solved.

Claims

1. The electric push rod of the automobile tail door is characterized by comprising a fixed assembly and a movable assembly, wherein the fixed assembly comprises a fixed sleeve, a motor, a speed reducer, a fixed seat, a screw rod, a fixed ring, a force unloading ring and a plurality of connecting rods, the motor, the speed reducer and the fixed seat are fixedly connected in the fixed sleeve, the speed reducer is connected with an output shaft of the motor, one end of the screw rod penetrates into the fixed seat and is connected with the speed reducer, so that the screw rod is driven by the motor to rotate, the inner wall of the fixed ring is fixedly connected to the end, away from the motor, of the screw rod, a plurality of connecting rods are arranged in parallel to the screw rod, one ends of the connecting rods are fixedly connected to the end face of the fixed seat, and the force unloading ring is sleeved on the screw rod in an;

2. The electric push rod for the automobile tail gate according to claim 1, wherein a spring is further arranged in the fixed sleeve, and the spring is sleeved on the movable sleeve in an empty mode and abuts between the connecting block and the fixed seat.

3. The electric push rod for the automobile tail gate according to claim 1, wherein the cross section of the sliding hole is in a key groove shape arranged along the radial direction of the screw rod.