阅读说明：本技术 用于汽车电动尾门的压入旋转机构以及产品质量检测方法 (Press-in rotating mechanism for automobile electric tail gate and product quality detection method ) 是由 朱晓 周继伟 刘维波 陶成军 吴晓刚 谢振球 王瑾 高云峰 于 2019-10-31 设计创作，主要内容包括：本发明适用于汽车电动尾门的生产技术领域,提供了一种用于汽车电动尾门的压入旋转机构以及产品质量检测方法。应用本发明的压入旋转机构,能将汽车电动尾门的内组件压入外导管,并能带动整个产品旋转完成激光焊接,经过激光焊接的产品,其内部零件的外壁能与外导管的内壁熔接在一起,电动尾门整体可达到很高的强度,具有很好的气密性,能承受很大的拉拔力。焊接过程无需依靠机械结构限位,生产工艺简单,并且本发明的压入旋转机构结构简单,可靠性高,制造成本较低。此外,本发明的产品质量检测方法通过逐步增加压力的方法来检测产品是否合格,判定方法简单,能高效率地筛选出不合格的产品,保证了产品出厂时的合格率。(The invention is suitable for the technical field of production of automobile electric tail doors, and provides a press-in rotating mechanism for an automobile electric tail door and a product quality detection method. The press-in rotating mechanism can press an inner component of the electric tail gate of the automobile into the outer guide pipe and can drive the whole product to rotate to complete laser welding, the outer wall of an inner part of the laser-welded product can be welded with the inner wall of the outer guide pipe, and the electric tail gate can achieve high strength and good air tightness and can bear large drawing force. The welding process does not need to depend on mechanical structure for limiting, the production process is simple, and the press-in rotating mechanism is simple in structure, high in reliability and low in manufacturing cost. In addition, the product quality detection method detects whether the product is qualified or not by a method of gradually increasing pressure, the judgment method is simple, unqualified products can be efficiently screened out, and the qualification rate of the products when leaving factories is ensured.)

1. The press-in rotating mechanism for the electric tail gate of the automobile is characterized by comprising a press-in module, a pressing rotating module and a controller, wherein the power output end of the press-in module is in transmission connection with the pressing rotating module so as to drive the pressing rotating module to do linear reciprocating motion; the compression rotating module comprises a rotating power source and a lower pressing contact which is used for being in contact with an upper cover of the electric tail gate of the automobile, the lower pressing contact is in transmission connection with a power output shaft of the rotating power source, and the lower pressing contact can drive the electric tail gate of the automobile to rotate when rotating; the controller can control the pressing module to drive the pressing and rotating module to move for a set linear distance and can control the power output shaft of the rotating power source to rotate for a set angle.

2. The press-in rotating mechanism for the electric tailgate of the automobile according to claim 1, wherein the pressing rotating module further comprises a lower pressing head, the lower pressing head is fixedly connected with a free end of a power output shaft of the rotating power source, a bottom of the lower pressing head is provided with an embedding groove, and the lower pressing contact is embedded in the embedding groove of the lower pressing head; the lower pressing contact is made of flexible materials, a hole groove is formed in the bottom of the lower pressing contact, and the shape of the hole groove is matched with that of an upper cover of the automobile electric tail door.

3. The press-in rotation mechanism for the power-driven tailgate of an automobile according to claim 1 or 2, wherein the pressing rotation module further comprises a pressing shaft and an origin sensor for recording an origin position of the pressing shaft, the rotation power source is a rotation servo motor, a power output shaft of the rotation power source is coaxially coupled with the pressing shaft, the rotation power source and the origin sensor are both electrically connected with the controller, and the controller is capable of receiving a signal from the origin sensor and controlling the rotation power source to rotate by a set angle.

4. The press-in rotating mechanism for the electric tailgate of the automobile according to claim 3, wherein the pressing rotating module further comprises a coupling, a first oilless bushing, a pressing flange, a thrust ball bearing, a second oilless bushing and a pressing shaft base; the power output shaft of rotary power source with the last push shaft passes through the coaxial hookup of shaft coupling, first oilless lining, hold-down flange, thrust ball bearing and second oilless lining overlap in proper order and establish in the outer peripheral edges of push shaft down, and the embedding in the push shaft base down.

5. The press-in rotating mechanism for the electric tailgate of the automobile according to claim 1, wherein the press-down module comprises a press-down servo motor and a press-down electric platform, and the press-down electric platform comprises a fixed seat, a ball screw and a slide block; the pressing servo motor is arranged at one end of the fixed seat, the fixed seat is provided with an overhead slide rail along the length direction of the fixed seat, the slide block is clamped on the slide rail and can slide back and forth along the length direction of the slide rail, and a power output shaft of the pressing servo motor is in transmission connection with a screw rod of the ball screw; the nut of the ball screw is fixedly connected with the sliding block; the sliding block is in transmission connection with the pressing rotating module.

6. The press-in rotating mechanism for the electric tailgate of the automobile according to claim 5, wherein a plurality of light blocking sheets are fixed on the sliding block and distributed at intervals up and down, a plurality of photoelectric sensors are respectively arranged on the fixed seat corresponding to the light blocking sheets, when the sliding block moves up and down, the light blocking sheets can enter the corresponding photoelectric sensors and block a receiver inside the photoelectric sensors from receiving light beams; the photoelectric sensors are electrically connected with the controller, and the controller can control the rotation of the pressing servo motor for a set number of turns according to signals received by the photoelectric sensors.

7. The press-in rotary mechanism for the power tailgate of an automobile according to claim 1, further comprising a support base, a tow chain mounting plate, and a tow chain for binding the cable; the drag chain mounting plate is fixedly mounted on the supporting base, one end of the drag chain is fixedly connected with the drag chain mounting plate, and the other end of the drag chain is fixedly connected with the compression rotating module.

8. A product quality detection method for an automobile electric tail gate is characterized by at least comprising the following steps:

assembling the internal parts of the electric tail gate of the automobile into an integral inner assembly, and then placing the inner assembly into an outer conduit, so that the fixed step and the damper part in the inner assembly enter the outer conduit and form a guide;

setting an initial pressure and a defined pressure greater than the initial pressure;

applying the initial pressure to the inner assembly, and if the inner assembly can be pressed to a preset position, indicating that the interference magnitude between the inner assembly and the outer catheter is small or a gap exists, judging that the automobile electric tail gate is a defective product;

if the initial pressure can not press the inner assembly to a preset position, gradually increasing the applied pressure until the inner assembly can be pressed to the preset position and the applied pressure is less than the limit pressure, and judging that the automobile electric tail gate is a qualified product;

and if the applied pressure is greater than the limited pressure, the inner assembly still cannot be pressed to the preset position, and the interference magnitude between the inner assembly and the outer catheter is large or the product has a problem, the electric tail gate of the automobile is judged to be a defective product.

9. The product quality inspection method of claim 8, wherein the inspection method of the pressure applied to the inner assembly comprises the steps of:

the method comprises the following steps that a pressing module is used as a power source for applying pressing pressure, the pressing module comprises a pressing servo motor and a pressing electric platform, and the pressing electric platform comprises a ball screw and a slide block; the power output shaft of the downward pressing servo motor is in transmission connection with the screw rod of the ball screw, the nut of the ball screw is fixedly connected with a sliding block, and the sliding block drives a pressing rotary module to apply downward pressure to the inner assembly; then, the magnitude of the pressure F exerted by the press-down contact on the inner component satisfies the following relationship:

F＝F _{push away}+G

Wherein:

F _{push away}The horizontal thrust in the vertical direction is adopted;

t is output torque of the pressing servo motor;

P _Bis a ball screw lead;

g is the sum of the gravity of the pressing rotating module and the sliding block of the downward pressing electric platform.

10. The product quality inspection method of claim 8, wherein the inspection method of the pressure applied to the inner assembly comprises the steps of:

arranging a pressure sensor at the bottom of the outer conduit, and reading a value F detected by the pressure sensor _{Conveying appliance}Then, the magnitude of the pressure F exerted by the press-down contact on the inner component satisfies the following relationship:

F＝F _{conveying appliance}-G

Wherein G is the weight of the electric tail gate of the automobile.

Technical Field

The invention belongs to the technical field of production of automobile electric tail doors, and particularly relates to a press-in rotating mechanism for an automobile electric tail door and a product quality detection method.

Background

The lift of traditional vapour car trunk relies on air spring vaulting pole to support, and manual opening or closing. At present, high-end vehicles or a plurality of high-distribution vehicles are already equipped with electric tail gates, and vehicles using gas spring support rods can be refitted into automatic lifting tail gates by purchasing the electric tail gates.

When the laser welding technology, especially the technology of laser to plastic welding, is not popularized, the electric tail gate is in the production process, and its internal parts depend on the mechanical structure for limiting, the production process is complicated, the number of parts is many, the reliability is poor, and the price is also high, which affects the popularization of the electric tail gate. If introduce the production of electronic tail-gate with laser plastic welding process, then electronic tail-gate internals only need interference fit with outer pipe, can pass through laser welding, make the outer wall of internals and the inner wall fuse of outer pipe be in the same place, electronic tail-gate is whole just can reach very high intensity, has fine gas tightness, can bear very big drawing force.

Disclosure of Invention

The invention aims to provide a press-in rotating mechanism for an automobile electric tail gate and a product quality detection method, which can solve the problems that when the electric tail gate is produced by adopting the prior art, internal parts of the electric tail gate need to be limited by a mechanical structure, the production process is complex, a plurality of parts are provided, the reliability is poor, and the price is high.

The invention is realized in such a way that the press-in rotating mechanism for the electric tail gate of the automobile comprises a press-in module, a pressing rotating module and a controller, wherein the power output end of the press-in module is in transmission connection with the pressing rotating module so as to drive the pressing rotating module to do linear reciprocating motion; the compression rotating module comprises a rotating power source and a lower pressing contact which is used for being in contact with an upper cover of the electric tail gate of the automobile, the lower pressing contact is in transmission connection with a power output shaft of the rotating power source, and the lower pressing contact can drive the electric tail gate of the automobile to rotate when rotating; the controller can control the pressing module to drive the pressing and rotating module to move for a set linear distance and can control the power output shaft of the rotating power source to rotate for a set angle.

Furthermore, the pressing and rotating module further comprises a lower pressing head, the lower pressing head is fixedly connected with the free end of the power output shaft of the rotating power source, an embedding groove is formed in the bottom of the lower pressing head, and the lower pressing contact is embedded in the embedding groove of the lower pressing head; the lower pressing contact is made of flexible materials, a hole groove is formed in the bottom of the lower pressing contact, and the shape of the hole groove is matched with that of an upper cover of the automobile electric tail door.

Furthermore, the compressing and rotating module further comprises a pressing shaft and an origin sensor for recording the origin position of the pressing shaft, the rotating power source is a rotating servo motor, a power output shaft of the rotating power source is coaxially connected with the pressing shaft, the rotating power source and the origin sensor are both electrically connected with the controller, and the controller can receive the signal of the origin sensor and control the rotating power source to rotate by a set angle.

Furthermore, the compressing and rotating module further comprises a coupling, a first oilless bushing, a compressing flange, a thrust ball bearing, a second oilless bushing and a lower pressing shaft base; the power output shaft of rotary power source with the last push shaft passes through the coaxial hookup of shaft coupling, first oilless lining, hold-down flange, thrust ball bearing and second oilless lining overlap in proper order and establish in the outer peripheral edges of push shaft down, and the embedding in the push shaft base down.

Further, the pressing module comprises a pressing servo motor and a pressing electric platform, and the pressing electric platform comprises a fixed seat, a ball screw and a slide block; the pressing servo motor is arranged at one end of the fixed seat, the fixed seat is provided with an overhead slide rail along the length direction of the fixed seat, the slide block is clamped on the slide rail and can slide back and forth along the length direction of the slide rail, and a power output shaft of the pressing servo motor is in transmission connection with a screw rod of the ball screw; the nut of the ball screw is fixedly connected with the sliding block; the sliding block is in transmission connection with the pressing rotating module.

Furthermore, a plurality of light blocking sheets which are distributed at intervals up and down are fixed on the sliding block, a plurality of photoelectric sensors are respectively arranged on the fixed seat corresponding to the light blocking sheets, and when the sliding block moves up and down, the light blocking sheets can enter the corresponding photoelectric sensors and block receivers in the photoelectric sensors from receiving light beams; the photoelectric sensors are electrically connected with the controller, and the controller can control the rotation of the pressing servo motor for a set number of turns according to signals received by the photoelectric sensors.

Further, the press-in rotating mechanism further comprises a supporting base, a drag chain mounting plate and a drag chain for binding the cable; the drag chain mounting plate is fixedly mounted on the supporting base, one end of the drag chain is fixedly connected with the drag chain mounting plate, and the other end of the drag chain is fixedly connected with the compression rotating module.

In order to achieve the above object, the present invention further provides a product quality detection method for an electric tailgate of an automobile, which at least comprises the following steps:

assembling the internal parts of the electric tail gate of the automobile into an integral inner assembly, and then placing the inner assembly into an outer conduit, so that the fixed step and the damper part in the inner assembly enter the outer conduit and form a guide;

setting an initial pressure and a defined pressure greater than the initial pressure;

applying the initial pressure to the inner assembly, and if the inner assembly can be pressed to a preset position, indicating that the interference magnitude between the inner assembly and the outer catheter is small or a gap exists, judging that the automobile electric tail gate is a defective product;

if the initial pressure can not press the inner assembly to a preset position, gradually increasing the applied pressure until the inner assembly can be pressed to the preset position and the applied pressure is less than the limit pressure, and judging that the automobile electric tail gate is a qualified product;

and if the applied pressure is greater than the limited pressure, the inner assembly still cannot be pressed to the preset position, and the interference magnitude between the inner assembly and the outer catheter is large or the product has a problem, the electric tail gate of the automobile is judged to be a defective product.

Further, the method for detecting the pressure applied to the inner assembly comprises the following steps:

the method comprises the following steps that a pressing module is used as a power source for applying pressing pressure, the pressing module comprises a pressing servo motor and a pressing electric platform, and the pressing electric platform comprises a ball screw and a slide block; the power output shaft of the downward pressing servo motor is in transmission connection with the screw rod of the ball screw, the nut of the ball screw is fixedly connected with a sliding block, and the sliding block drives a pressing rotary module to apply downward pressure to the inner assembly; then, the magnitude of the pressure F exerted by the press-down contact on the inner component satisfies the following relationship:

F＝F _{push away}+G

Wherein:

F _{push away}The horizontal thrust in the vertical direction is adopted;

t is output torque of the pressing servo motor;

P _Bis a ball screw lead;

g is the sum of the gravity of the pressing rotating module and the sliding block of the downward pressing electric platform.

Further, the method for detecting the pressure applied to the inner assembly comprises the following steps:

arranging a pressure sensor at the bottom of the outer conduit, and reading a value F detected by the pressure sensor _{Conveying appliance}Then, the magnitude of the pressure F exerted by the press-down contact on the inner component satisfies the following relationship:

F＝F _{conveying appliance}-G

Wherein G is the weight of the electric tail gate of the automobile.

Compared with the prior art, the invention has the beneficial effects that:

the press-in rotating mechanism can press an inner component of the electric tail gate of the automobile into the outer guide pipe and can drive the whole product to rotate to complete laser welding, the outer wall of an inner part of the product subjected to laser welding can be welded with the inner wall of the outer guide pipe, the electric tail gate can integrally reach high strength, the electric tail gate has good air tightness, can bear large drawing force, and effectively improves the performance of the product. The whole welding process of the product does not need to depend on mechanical structure for limiting, the production process is simple, and the press-in rotating mechanism disclosed by the invention is simple in structure, high in reliability and lower in manufacturing cost. In addition, the product quality detection method detects whether the product is qualified or not by a method of gradually increasing pressure, has simple judgment method, can efficiently screen out unqualified products, and effectively ensures the qualification rate of the products when leaving factories.

Drawings

FIG. 1 is a schematic front view of an inner assembly of an automotive power tailgate to be produced in accordance with the present invention;

FIG. 2 is a schematic cross-sectional view of an outer duct of an automotive power tailgate to be produced in accordance with the present invention;

FIG. 3 is a schematic front view of the inner assembly of the automotive power tailgate of the present invention in production naturally positioned within the outer duct;

FIG. 4 is a schematic front view of an automotive power tailgate of the present invention after the inner assembly has been pressed into the outer duct;

FIG. 5 is a schematic view of a pressed automotive power tailgate being laser welded;

fig. 6 is a schematic perspective view of a press-in rotating mechanism according to an embodiment of the present invention;

fig. 7 is a schematic longitudinal sectional view of a press-down module of a press-in rotating mechanism according to an embodiment of the present invention;

fig. 8 is a schematic perspective view of a pressing rotary module of a pressing rotary mechanism according to an embodiment of the present invention;

fig. 9 is a schematic longitudinal sectional view of a pressing rotary module pressed into a rotary mechanism according to an embodiment of the present invention;

fig. 10 is an exploded view of a pressing rotary module of a pressing rotary mechanism according to an embodiment of the present invention;

fig. 11 is a flowchart of a product quality detection method for an electric tailgate of an automobile according to a second embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1, the electric tailgate product for an automobile to be produced according to the present invention includes an upper cover 11, a motor 12, a speed reducer 13, a damper 14, a fixed step 15, an inner duct 16, a screw 17, and an outer duct 18. The technical scheme provided by the embodiment of the invention is that the inner component is pressed into the outer catheter 18, and a certain degree of pre-pressure is applied to drive a product to rotate to complete laser welding.

The outer catheter 18 is fixed by a special clamp, please refer to fig. 2, the inner structure of the outer catheter 18 is a hollow round tube, the middle part is provided with a step 181, the inner circle of the outer catheter 18 has a certain draft angle, i.e. the inner diameter of the port is larger than that of the step 181, the inner assembly is placed into the outer catheter 18, the natural placement state is shown in fig. 3, the fixed step 15 and the damper 14 part enter the outer catheter 18 to form a guide, the upper cover 11 of the product is pressed downwards, and the inner assembly is pressed in place, as shown in fig. 4.

Referring to fig. 5, a schematic diagram of laser welding of a pressed product is shown, where a laser 20 moves to a welding position, the product starts to rotate, a welding device starts to perform light-emitting welding, and after one circle of welding is completed, the laser 20 moves upward to the next welding position, and starts to perform the next circle of welding until the welding is completed.