阅读说明：本技术 防脱落连接单元、具有这种单元的安装组件及其装配方法 (Anti-drop connection unit, mounting assembly having such a unit and method for assembling the same ) 是由 张为为 于 2021-07-05 设计创作，主要内容包括：本发明涉及汽车整车制造或发动机组装领域,尤其涉及一种防脱落连接单元,包括设有安装孔的安装构件、螺栓和保持器。安装孔为通孔并具有上下部段,螺栓贯穿安装孔,保持器在安装孔内位于保持器预定位置,保持器在该位置包围螺栓,确保螺栓在安装孔内保持在螺栓预安装位置,螺栓头部在该位置距安装孔上端面的间距大于零,保持器在保持器预定位置位于安装孔下部段区域中,以挤压螺栓,从而给螺栓提供确定的拉拔阻力,以确保螺栓保持为其螺栓根部在螺栓预安装位置超过安装孔的下端面伸出确定的长度。本发明还涉及一种相应的安装组件以及一种相应的装配方法。本发明能够同时满足对螺栓的限位和防脱落功能,避免螺栓在运输过程中移位或脱落。(The invention relates to the field of automobile manufacturing or engine assembling, in particular to an anti-falling connecting unit which comprises a mounting component provided with a mounting hole, a bolt and a retainer. The mounting hole is a through hole and has upper and lower sections, the bolt penetrates through the mounting hole, the retainer is located in a retainer preset position in the mounting hole, the retainer surrounds the bolt at the position to ensure that the bolt is kept in a bolt pre-mounting position in the mounting hole, the distance between the head of the bolt and the upper end face of the mounting hole is larger than zero at the position, the retainer is located in the lower section area of the mounting hole at the retainer preset position to squeeze the bolt, so that determined drawing resistance is provided for the bolt, and the bolt is kept to be extended to a determined length, wherein the root of the bolt extends out of the lower end face of the mounting hole at the bolt pre-mounting position. The invention also relates to a corresponding mounting assembly and a corresponding assembly method. The invention can simultaneously meet the functions of limiting the bolt and preventing the bolt from falling off, and avoids the bolt from shifting or falling off in the transportation process.)

1. A drop-proof connection unit (100) comprising at least:

-a mounting member (50), in which mounting member (50) a mounting hole (10) is provided, which mounting hole (10) is configured as a through-hole and comprises an upper section (11) and a lower section (12),

-a bolt (20), the bolt (20) having a bolt head (21) and a bolt root (22), the bolt (20) being arranged adapted to extend through the mounting hole (10), and

-a retainer (30), the retainer (30) being arranged to be adapted to be located at a retainer predetermined position (P30) within the mounting hole (10), at which retainer predetermined position (P30) the retainer (30) surrounds the bolt (20) to ensure that the bolt (20) is held at a bolt pre-mounting position (P20) within the mounting hole (10), at which bolt pre-mounting position (P20) the distance (L1) of the bolt head (21) from the upper end face of the mounting hole (10) is greater than zero,

it is characterized in that the preparation method is characterized in that,

at the retainer predetermined position (P30), the retainer (30) is located in the region of the lower section (12) of the mounting hole (10) in order to press the bolt (20) in the region of the lower section (12) in order to provide the bolt (20) with a determined pull-out resistance (FG) to ensure that the bolt (20) is held with its bolt root (22) projecting beyond the lower end face of the mounting hole (10) by a determined length (L2) in the bolt pre-mounting position (P10).

2. The drop-preventing connection unit (100) according to claim 1,

a stop (13) is provided between the upper section (11) and the lower section (12) for limiting a retainer predetermined position (P30) of the retainer (30).

3. The drop-preventing connection unit (100) according to claim 1 or 2,

the diameter (D1) of the upper section (11) is different from the diameter (D2) of the lower section (12), preferably the diameter (D2) of the lower section (12) is larger than the diameter (D1) of the upper section (11), particularly preferably the diameter (D2) of the lower section (12) is in the range between 7.85mm and 7.90 mm.

4. The drop-preventing connection unit (100) according to any one of claims 1 to 3,

the determined pull-out resistance (FG) is at least 5N, preferably in the range between 9.75N and 11.94N, and/or

The bolt (20) is an M6 standard bolt, and/or

The retainer (30) is a flexible retainer, preferably a flexible four-arc holding retainer, and/or

The determined length (L2) is in the range of 2mm to 4 mm.

5. The drop-preventing connection unit (100) according to any one of claims 1 to 4,

the anti-drop connection unit (100) is configured to be held as a whole during transportation, and/or

The anti-drop connection unit (100) is designed to be mounted as a whole on a corresponding mounting component (200), in particular an engine cover, and/or

The mounting member (50) is an oil filler pipe.

6. A mounting assembly (1000) comprising at least:

-a corresponding mounting member (200), in particular an engine head, and

-a drop-off preventing connection unit (100) according to any one of claims 1 to 4, said drop-off preventing connection unit (100) being mounted on said corresponding mounting member (200).

7. Method for assembling a drop-off prevention connection unit (100) according to any one of claims 1 to 5 and/or for assembling a mounting assembly (1000) according to claim 6, said method comprising at least the following steps:

s1: pressing a retainer (30) from a lower end face of a mounting hole (10) in a mounting member (50) toward a direction (R1) inside the mounting hole (10) until the retainer (30) is located at a retainer predetermined position (P30) in a lower section (12) of the mounting hole (10), and

s2: a bolt (20) is pressed in from the upper end surface of the mounting hole (10) in the direction (R2) toward the inside of the mounting hole (10) until the bolt (20) is located at a bolt pre-mounting position (P20), thereby constituting a drop-off prevention connection unit (100).

8. The method according to claim 7, further comprising at least the steps of:

s3: the bolt root (22) of the bolt (20) of the anti-drop connection unit (100) is screwed further into a corresponding mounting hole (201) of a corresponding mounting component (200), in particular of an engine cylinder head, until the distance (L1) of the bolt head (21) from the upper end face of the mounting hole (10) is equal to zero, thereby forming a mounting assembly (1000).

9. The method of claim 7 or 8,

the retainer (30) is held at a retainer predetermined position (P30) during step S2 and/or step S3.

10. The method of any one of claims 7 to 9,

after the drop-off prevention connection unit (100) is constructed, in the case where a determined drawing force (F0), particularly a drawing force smaller than 7.7N, is applied to the bolt (20) of the drop-off prevention connection unit (100), the bolt (20) is still held at the bolt pre-installation position (P20) based on the drawing resistance (FG) provided by the retainer (30).

Technical Field

The present invention relates to a disconnection preventing connection unit, a mounting assembly having the same, and a method for assembling the disconnection preventing connection unit and/or for assembling the mounting assembly.

Background

In the field of automotive vehicle manufacturing or engine assembly, it is often necessary to pre-assemble multiple parts for common transport, such as from part manufacturers, by sea, air or land to an engine plant for engine assembly. In this process, the drop-off preventive connection unit having the drop-off preventive function is required to ensure that the problem of displacement or drop-off of the individual parts does not occur during transportation. In the prior art, the bolt displacement is limited by mainly adopting a plastic gasket, but certain defects still exist in the practical application process.

Disclosure of Invention

It is an object of the present invention to provide an improved drop-off preventing connection unit, an improved mounting assembly and an improved method for assembling a drop-off preventing connection unit and/or for assembling a mounting assembly.

According to a first aspect of the present invention, there is provided an anti-drop connection unit including at least: a mounting member in which a mounting hole is provided, the mounting hole being configured as a through-hole and including an upper section and a lower section; a bolt having a bolt head and a bolt root, the bolt being arranged to be adapted to pass through the mounting hole; and a retainer arranged to be adapted to be located in the mounting hole at a retainer predetermined position at which the retainer surrounds the bolt to ensure that the bolt is retained in a bolt pre-mounting position in the mounting hole at which the head of the bolt is spaced from the upper end face of the mounting hole by a distance greater than zero, wherein in the retainer predetermined position the retainer is located in the region of the lower section of the mounting hole to compress the bolt in the region of the lower section to provide a determined pull-out resistance to the bolt to ensure that the bolt is retained with its root projecting a determined length beyond the lower end face of the mounting hole in the bolt pre-mounting position.

According to an alternative embodiment of the invention, a stop is provided between the upper section and the lower section for defining a holder predetermined position of the holder.

According to an alternative embodiment of the invention, the diameter of the upper section is different from the diameter of the lower section, preferably the diameter of the lower section is larger than the diameter of the upper section, particularly preferably the diameter of the lower section is in the range between 7.85mm and 7.90 mm.

According to an alternative embodiment of the invention, said determined pull-out resistance is at least 5N, preferably in the range between 9.75N and 11.94N.

According to an alternative embodiment of the invention, the bolt is an M6 standard bolt.

According to an alternative embodiment of the invention, the holder is a flexible holder, preferably a flexible four-arc surface hugging holder.

According to an alternative embodiment of the invention, said determined length is in the range of 2mm to 4 mm.

According to an alternative embodiment of the invention, the drop-off prevention connection unit is configured to be held as a whole during transport.

According to an alternative embodiment of the invention, the drop-off prevention connection unit is configured to be adapted to be mounted as a whole on a corresponding mounting member, in particular an engine head.

According to an alternative embodiment of the invention, the mounting member is an oil filler pipe.

According to a second aspect of the present invention, there is provided a mounting assembly comprising at least a counter-mounting member (in particular an engine head) and the above-mentioned drop-off preventing connecting unit mounted on the counter-mounting member.

According to a third aspect of the present invention, there is provided a method for assembling the above drop-off preventive connecting unit and/or for assembling the above mounting assembly. The method comprises at least the following steps: first, pressing a retainer from a lower end surface of a mounting hole in a mounting member toward an inside of the mounting hole until the retainer is located at a retainer predetermined position in a lower section of the mounting hole; then, a bolt is pressed from the upper end surface of the mounting hole in a direction toward the inside of the mounting hole until the bolt is located at a bolt pre-mounting position, thereby constituting the drop-off preventive connection unit.

According to an alternative embodiment of the invention, the method may further comprise at least the steps of: and further screwing the bolt root of the bolt of the anti-falling connecting unit into a corresponding mounting hole of a corresponding mounting component (particularly an engine cylinder cover) until the distance between the bolt head and the upper end surface of the mounting hole is equal to zero, thereby forming the mounting assembly.

According to an alternative embodiment of the present invention, the holder is held at the holder predetermined position during the construction of the drop-off preventive connecting unit and/or the construction of the mounting assembly.

According to an alternative embodiment of the present invention, after the drop-off prevention connection unit is constructed, in the case where a certain drawing force, particularly a drawing force of less than 7.7N is applied to the bolt of the drop-off prevention connection unit, the bolt is still held at the bolt pre-installation position based on the drawing resistance provided by the holder.

The advantages of the invention are in particular:

stable drawing resistance is provided for the bolt, and meanwhile, the limiting and anti-falling functions of the bolt are met;

in particular, the bolts are prevented from being displaced or falling out of the mounting holes during transport;

applying existing standard retainers to the modified mounting holes, thereby enabling cost savings;

make the holder easy to install, not easy to displace after installation, without requiring disassembly;

the requirement of the engine factory for the length of the bolt root extending out of the mounting member (e.g. oil filler pipe) is met, and the bolt root is convenient to assemble on the corresponding mounting member (e.g. engine cylinder head).

Drawings

The principles, features and advantages of the present invention may be better understood by describing the invention in more detail below with reference to the accompanying drawings. The drawings comprise:

fig. 1 illustrates a sectional view of a drop prevention connection unit according to an exemplary embodiment of the present invention;

fig. 2 illustrates a schematic perspective view of a method for assembling the drop-off prevention connection unit according to an exemplary embodiment of the present invention;

FIG. 3 shows a schematic perspective view of a method for assembling a mounting assembly according to an exemplary embodiment of the present invention;

fig. 4 shows a schematic flow diagram of a method for assembling a drop-off prevention connection unit or a mounting assembly according to an exemplary embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and exemplary embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the scope of the invention. Herein, for the sake of brevity, elements having the same reference numerals are not labeled in all the drawings.

Within the framework of the invention, the terms "upper" and "lower" indicate the normal mounting orientation of the components.

Fig. 1 schematically shows an anti-drop connection unit 100 according to an exemplary embodiment of the present invention.

As shown in fig. 1, the falling off preventive connection unit 100 may include a mounting member 50, a bolt 20, and a holder 30. Here, the mounting member 50 is provided with a mounting hole 10. For example, the mounting hole 10, the bolt 20 and the holder 30 may have a common rotational symmetry axis a.

According to an exemplary embodiment of the present invention, the drop-off preventive connection unit 100 is exemplarily configured to be adapted to be held as a whole during transportation, for example, transportation from a parts manufacturer to an engine plant for engine assembly. As an alternative example, the mounting member 50 of the drop-off prevention connection unit 100 may be configured as an oil filler pipe and then should be mounted on, for example, an engine cover.

As shown in fig. 1, the mounting hole 10 is configured as a through hole and includes an upper section 11 and a lower section 12.

As shown in fig. 1, the bolt 20 has a bolt head 21 and a bolt root 22, wherein the bolt 20 is arranged to be adapted to pass through the mounting hole 10. According to an exemplary embodiment of the present invention, the bolt 20 is an M6 standard bolt.

In fig. 1, the retainer 30 is located in a retainer predetermined position P30, in which retainer predetermined position P30 the retainer 30 is located in the region of the lower section 12 of the mounting hole 10 in order to press the bolt 20 in the region of the lower section 12 in order to hold the bolt 20 in the bolt pre-mounting position P20 shown in fig. 1. As shown in fig. 1, at the bolt pre-installation position P20, the distance L1 from the bolt head 21 of the bolt 20 to the upper end surface of the installation hole 10 is greater than zero. According to an exemplary embodiment of the invention, the bolt 20 may have a bolt final mounting position, not shown in the drawings, in which the bolt root 22 of the bolt 20 is further screwed into a corresponding mounting hole 201 of a corresponding mounting member 200 (e.g. an engine head) (see also fig. 3). In this case, when the bolt 20 is in the bolt final mounting position, the distance L1 of the bolt head 21 from the upper end face of the mounting hole 10 is equal to zero.

According to an exemplary embodiment of the present invention, as also shown in fig. 1, when the bolt 20 is held at the bolt pre-installation position P20, the bolt root 22 thereof protrudes beyond the lower end surface of the installation hole 10 by a certain length L2, thereby ensuring that the subsequent installation process of the drop-off preventive connection unit 100 (e.g., installation on the corresponding installation member 200) can be smoothly performed. As an alternative example, this determined length L2 is 3mm ± 1mm, i.e. in the range of 2mm to 4 mm.

According to an exemplary embodiment of the present invention, in the case where the bolt 20 is at the bolt pre-installation position P20 as shown in fig. 1, if an upward drawing force F0 is applied to the bolt 20 at this time, the drop-off preventive connecting unit 100 accordingly provides a downward drawing resistance FG to the bolt 20 for offsetting the drawing force F0 so that the bolt 20 is still held at the bolt pre-installation position P20. As an alternative example, this pull-out resistance FG has a maximum value of at least 5N, preferably in the range between 9.75N and 11.94N. As an alternative example, in the case where the drawing force F0 applied to the bolt 20 of the drop-off preventive connection unit 100 is less than the drawing force of 7.7N, the bolt 20 is still held at the bolt pre-installation position P20 based on the drawing resistance FG provided by the retainer 30. Such pulling-out resistance FG can particularly prevent the drop-out preventing attachment unit 100 as a whole from being accidentally displaced or dropped out of the bolt 20 due to an external force during the transportation process (e.g., from a part manufacturer to an engine plant) without causing the retainer 30 to be excessively deformed by compression, thereby causing problems of difficulty in mounting, excessive wear, and the like.

According to an exemplary embodiment of the present invention, as also shown in fig. 1, a stop 13, illustratively a step, may be provided between the upper section 11 and the lower section 12 of the mounting hole 10 for defining a retainer predetermined position P30 of the retainer 30, in particular for preventing the retainer 30 from moving upwards into the area of the upper section 11.

According to an exemplary embodiment of the present invention, also shown in FIG. 1, the upper section 11 has a diameter D1 and the lower section 12 has a diameter D2. Preferably, diameter D2 is greater than diameter D1. Particularly preferably, the diameter D2 is in the range between 7.85mm and 7.90 mm.

Fig. 2 illustrates a schematic perspective view of a method for assembling the drop-off prevention connection unit 100 according to an exemplary embodiment of the present invention.

Fig. 3 shows a schematic perspective view of a method for assembling the mounting assembly 1000 according to an exemplary embodiment of the present invention.

Fig. 4 shows a schematic flow chart of a method for assembling the drop-off prevention connection unit 100 or the mounting assembly 1000 according to an exemplary embodiment of the present invention.

Hereinafter, a method for assembling the drop-off prevention connection unit 100 or the mounting assembly 1000 according to the exemplary illustration of fig. 2 and 3 will be further explained with reference to fig. 4.

According to an exemplary embodiment of the present invention, as also shown in fig. 2, in order to constitute the drop-off preventing connection unit 100, the method according to the present invention may include the steps of:

at step S1, pressing in the retainer 30 from the lower end face of the mounting hole 10 in the mounting member 50 toward the direction R1 inside the mounting hole 10 until the retainer 30 is located at a retainer predetermined position P30 in the lower section 12 of the mounting hole 10, preferably the retainer predetermined position P30 is defined by a stopper 13 (exemplarily a step) arranged between the upper section 11 and the lower section 12 of the mounting hole 10 (see also fig. 1);

in step S2, the bolt 20 is pressed in a direction R2 from the upper end surface of the mounting hole 10 toward the inside of the mounting hole 10 until the bolt 20 is located at a bolt pre-mounting position P20, where a distance L1 from the bolt head 21 of the bolt 20 to the upper end surface of the mounting hole 10 is greater than zero at the bolt pre-mounting position P20 (see also fig. 1).

According to an exemplary embodiment of the present invention, the holder 30 remains located at the holder predetermined position P30 during step S2.

As an alternative, as also shown in fig. 2, the retainer 30 is a four-arc holding retainer, in particular made of a flexible material (e.g., thermoplastic rubber), so that the retainer 30 can contact or press the bolt 20 in a larger area in the circumferential direction with reference to the axis a shown in fig. 1, compared to other types of retainers (e.g., a gasket), and this range of action further reduces the machining depth of the mounting hole 10, for example, by 2 mm.

According to an exemplary embodiment of the present invention, as also shown in fig. 3, to construct a mounting assembly 1000, a method according to the present invention may further comprise the steps of:

at step S3: the bolt root 22 of the bolt 20 of the drop-off prevention connection unit 100 is further screwed into the corresponding mounting hole 201 of the corresponding mounting member 200 (in particular, an engine head) until the distance L1 of the bolt head 21 from the upper end surface of the mounting hole 10 is equal to zero.

According to an exemplary embodiment of the present invention, the holder 30 remains located at the holder predetermined position P30 during step S3.

Although specific embodiments of the invention have been described herein in detail, they have been presented for purposes of illustration only and are not to be construed as limiting the scope of the invention. Various substitutions, alterations, and modifications may be devised without departing from the spirit and scope of the present invention. The preceding explanations of embodiments describe the invention only in the framework of said examples. Of course, the individual features of the embodiments can be freely combined with one another as far as technically expedient, without departing from the framework of the invention.

Other advantages and alternative embodiments of the present invention will be apparent to those skilled in the art. Therefore, the invention in its broader aspects is not limited to the specific details, representative structures, and illustrative examples shown and described. On the contrary, various modifications and substitutions may be made by those skilled in the art without departing from the basic spirit and scope of the invention.