阅读说明：本技术 拖车钩安装结构 (Tow hook mounting structure ) 是由 牛宝忠 杨克璧 黄瑛 孙晓燕 张正 于 2020-07-24 设计创作，主要内容包括：本发明提供了一种拖车钩安装结构,包括槽型的前防撞梁的槽底开设的供拖车杆穿过的通孔,通孔后方设置有螺母座,车长方向上拖车杆的螺纹段前方紧邻设置有扩胀单元,拖车杆的螺纹段旋入螺母座后,扩胀单元后端与螺母座挤压驱使扩胀单元前端张开,扩胀单元前端张开后与前防撞梁的槽底构成限制拖车杆相对于前防撞梁向前位移的限位配合。取消了常见的螺纹管安装结构,这样便能避免过长的刚性螺纹管结构挤占吸能盒的压缩空间,同时在本申请人的在先申请的方案的基础上减少了一个螺母座,使得拖车钩安装时只需对准一个螺母座即可,避免多个螺母座配合安装时出现互相干涉的情况。(The invention provides a trailer hook mounting structure which comprises a through hole formed in the groove bottom of a groove-shaped front anti-collision beam and used for a trailer rod to penetrate through, wherein a nut seat is arranged behind the through hole, an expansion unit is arranged in front of a thread section of the trailer rod in the vehicle length direction in an adjacent mode, the thread section of the trailer rod is screwed into the nut seat, the rear end of the expansion unit is extruded with the nut seat to drive the front end of the expansion unit to be opened, and the opened front end of the expansion unit and the groove bottom of the front anti-collision beam form limiting matching for limiting the forward displacement of the trailer rod relative to the front anti-collision beam. The common threaded pipe installation structure is cancelled, so that the phenomenon that the overlong rigid threaded pipe structure occupies the compression space of the energy absorption box in an extruding mode can be avoided, and meanwhile, a nut seat is reduced on the basis of the scheme of the applicant's prior application, so that the towing hook only needs to be aligned to one nut seat during installation, and the condition that a plurality of nut seats are mutually interfered during matched installation is avoided.)

1. The utility model provides a tow hook mounting structure which characterized in that: the trailer is characterized by comprising a through hole (20) which is formed in the groove bottom of a groove-shaped front anti-collision beam (1) and is used for a trailer rod (10) to penetrate through, a nut seat (31) is arranged behind the through hole (20), an expansion unit (40) is arranged in the front close proximity of a thread section (11) of the trailer rod (10) in the vehicle length direction, the thread section (11) of the trailer rod (10) is screwed into the nut seat (31), the rear end of the expansion unit (40) is extruded with the nut seat (31) to drive the front end of the expansion unit (40) to be opened, and the opened front end of the expansion unit (40) and the groove bottom of the front anti-collision beam (1) form limiting fit for limiting forward displacement of the trailer rod (10) relative to the front anti.

2. The tow hook mounting structure according to claim 1, wherein: the expansion unit (40) comprises at least 2 tile-shaped blocks (41) which are uniformly arranged in the circumferential direction at intervals in front of the threaded section (11) of the trailer rod (10), a C-shaped clamp spring (42) is arranged at the position, close to the rear, of the middle part of the outer side of each tile-shaped block (41) to restrain the tile-shaped blocks (41) to be attached to the trailer rod (10), a convex stepped shaft (12) is arranged at the position, close to the front end of each tile-shaped block (41), of the trailer rod (10), after the threaded section (11) of the trailer rod (10) is screwed into the nut seat (31), the tile-shaped block (41) is squeezed between the nut seat (31) and the step shaft (12) to drive the tile-shaped block (41) to swing around the rear end of the tile-shaped block to form a swing with the front end far away from the trailer rod (10), and the front end of the tile-shaped block (41) far away from the trailer rod (10) is abutted against the bottom of the front anti-collision beam (1) to form a limit fit for limiting the forward displacement of the trailer rod (10) relative to the front anti-collision beam (1).

3. The tow hook mounting structure according to claim 2, wherein: a limiting groove (411) used for accommodating the C-shaped clamp spring (42) is formed in the middle part of the outer wall of the tile-shaped block (41) close to the rear part, and the ring section of the C-shaped clamp spring (42) corresponding to the gap between the tile-shaped blocks (41) is concave.

4. The tow hook mounting structure according to claim 2 or 3, wherein: the inner side of the rear part of the tile-shaped block (41) is provided with a convex rib (412), and a clamping groove (13) for accommodating the convex rib (412) is formed in the position, corresponding to the convex rib (412), of the trailer rod (10).

5. The tow hook mounting structure according to claim 4, wherein: the preceding lateral wall of protruding muscle (412) and draw-in groove (13) is the inclined wall of direction of the wall in the place ahead inwards, tile type piece (41) front end inboard is along being provided with the guide surface of the place ahead in the orientation and/or step axle (12) rear end outside is along being provided with the guide surface towards outside rear.

6. The tow hook mounting structure according to claim 2 or 3, wherein: the contact end of the nut seat (31) and the tile-shaped block (41) is an annular surface (311) with the wall surface facing outwards and in the front, an annular table (312) with the inner wall surface facing inwards and in the front is protruded in front of the outer ring of the annular surface (311), the rear end surface of the tile-shaped block (41) is matched with the annular surface (311), an included angle is formed between the inner wall surface of the annular table (312) and the outer surface of the tile-shaped block (41), and the inner diameter of the root part of the annular table (312) is consistent with the outer diameter of the tile-shaped block (.

7. The tow hook mounting structure according to claim 1, wherein: the expansion unit (40) comprises an elastic sleeve (43) arranged in front of a threaded section (11) of the trailer rod (10), a convex step shaft (12) is arranged at the front end of the trailer rod (10) close to the elastic sleeve (43), after the threaded section (11) of the trailer rod (10) is screwed into the nut seat (31), the elastic sleeve (43) is squeezed between the nut seat (31) and the step shaft (12) to drive the front end of the elastic sleeve (43) to expand and sleeve on the step shaft (12), the front end of the elastic sleeve (43) on the step shaft (12) abuts against the groove bottom of the front anti-collision beam (1), or the elastic sleeve (43) on the step shaft (12) is embedded into a hole of the through hole (20) to form limiting fit with the front anti-collision beam (1) for limiting forward displacement of the trailer rod (10) relative to the front anti-collision beam (1).

8. The tow hook mounting structure according to claim 7, wherein: and an annular guide surface convenient for the front end of the elastic sleeve (43) to open is arranged on the inner side edge of the front end of the elastic sleeve (43) and/or the outer side edge of the rear end of the stepped shaft (12).

9. The tow hook mounting structure according to claim 2 or 7, wherein: through-hole (20) department is provided with annular seat (21), and the rear side outer loop back-projection of annular seat (21) has annular step (211), step axle (12) diameter is less than and is close annular seat (21) inner ring diameter, constitutes the region that holds spacing inflation unit (40) rear end between annular step (211) and step axle (12).

10. The tow hook mounting structure according to claim 1, 2 or 7, wherein: nut seat (31) set up on preceding crashproof roof beam (1) notch department sets up riser (30), and the middle part left and right sides of riser (30) extends forward to the tank bottom of preceding crashproof roof beam (1) and forms landing leg (32), and the front end of landing leg (32) is provided with stabilizer blade (33) of pasting the tank bottom of crashproof roof beam (1) in the front, and stabilizer blade (33) are located the side that deviates from of two landing legs (32), and the upper and lower both sides overlap joint of riser (30) is on the notch turn-ups of crashproof roof beam (1) in the front, dislocation forward for upper and lower both sides in riser (30) middle section, rounding off between dislocation section (34) and riser (30) upper and lower both sides.

Technical Field

The invention relates to the field of automobile parts, in particular to a trailer hook mounting structure.

Background

The trailer hook is a trailer and a traction device of an automobile, and the trailer hook is arranged when the automobiles of various brands leave a factory and becomes a part which must be equipped for the automobile.

The prior application with the publication number of CN110962513A of the applicant discloses a trailer hook nut box, which cancels a common nut tube structure by arranging a front nut seat and a rear nut seat so as to avoid a threaded tube arranged in front of an energy absorption box from extruding and occupying the compression space of the energy absorption box and ensure that the energy absorption box can fully compress the energy absorption when a vehicle is impacted. However, the front nut seat and the rear nut seat are arranged in the application, when the towing hook is screwed in, the towing hook needs to be in threaded fit with the front nut seat and the rear nut seat sequentially, when the towing hook is screwed in the front nut seat, the towing hook continues to be screwed in forwards, when the threaded end of the towing hook reaches the rear nut seat, position deviation is easy to generate, idle screwing can be generated on the rear nut seat at the moment, the towing hook stretches into the rear nut seat relative to the front nut seat in the rotation process of the towing hook, the tail end of the towing hook cannot be screwed in the rear nut seat in time, the rear nut seat is required to be screwed out and screwed in alignment with the rear nut seat repeatedly, time and labor are wasted in the operation, and the rear nut seat can be subjected to position deviation to further influence on the screwing in of the towing hook when the towing hook is used for a long time or.

Disclosure of Invention

The invention aims to provide a tow hook mounting structure which is convenient for screwing in a tow hook while avoiding occupying a compression space of an energy absorption box.

In order to achieve the purpose, the scheme of the invention is as follows: the utility model provides a tow hook mounting structure, the through-hole that supplies the trailer pole to pass that the tank bottom was seted up including the preceding crashproof roof beam of cell type, the through-hole rear is provided with the nut seat, the screw thread section the place ahead of trailer pole is closely adjacent to in the car length direction is provided with the expansion unit, behind the screw thread section screw in nut seat of trailer pole, the expansion unit rear end drives the expansion unit front end with the extrusion of nut seat and opens, the expansion unit front end opens the back and constitutes the spacing cooperation that restricts the trailer pole and move forward for preceding crashproof roof beam with the tank bottom of preceding crashproof roof beam.

In the scheme, a common threaded pipe installation structure is cancelled, so that the situation that a overlong rigid threaded pipe structure occupies a compression space of the energy absorption box in an extruding mode can be avoided, meanwhile, a nut seat is reduced on the basis of the scheme of the applicant's prior application, only one nut seat needs to be aligned when the trailer hook is installed, the situation of mutual interference when a plurality of nut seats are installed in a matching mode is avoided, and the expansion unit is further arranged to enable the nut seat to form a limit position with the automobile anti-collision beam, so that the situation that local stress is too large due to the fact that only one nut seat is stressed is avoided.

Drawings

FIG. 1 is a schematic view of an impact beam construction;

FIG. 2 is a schematic perspective view of the present invention;

FIG. 3 is a schematic end view of a trailer hook of the present invention;

FIG. 4 is a schematic illustration of a tow hook;

FIG. 5 is a schematic view of a tile;

FIG. 6 is a schematic view of a C-shaped clamp spring;

FIGS. 7 and 8 are schematic views of two positions according to the first embodiment;

fig. 9 is a schematic structural diagram of the second embodiment.

Detailed Description

The utility model provides a tow hook mounting structure, the through-hole 20 that confession trailer pole 10 passed including the tank bottom of the preceding crashproof roof beam 1 of cell type was seted up, through-hole 20 rear is provided with nut seat 31, the screw thread section 11 the place ahead of trailer pole 10 is next-door neighbour be provided with the unit 40 that expands in the car length direction, behind the screw thread section 11 screw in nut seat 31 of trailer pole 10, expand unit 40 rear end and the extrusion of nut seat 31 and order about the unit 40 front end that expands and open, expand unit 40 front end and the tank bottom of preceding crashproof roof beam 1 constitute the spacing cooperation of restriction trailer pole 10 for preceding crashproof roof beam 1 forward displacement after opening.

The directions in the above difficulties are all explained with reference to the direction of the vehicle body, and the tow hook in the present invention is broadly intended to mean all rod-like trailer attachments for towing vehicles, which may also be a trailer ring, having one end connected to the vehicle and one end connected to the vehicle. During installation, the threaded section 11 of the trailer rod 10 is screwed into the nut seat 31, the rear end of the expansion unit 40 is extruded with the nut seat 31 to expand the front end of the expansion unit, during disassembly, the threaded section 11 of the trailer rod 10 is screwed out of the nut seat 31, the extrusion force between the expansion unit 40 and the nut seat 31 disappears, and the expansion unit 40 restores to enable the expansion unit to penetrate through the through hole 20. In the invention, a common threaded pipe installation structure is cancelled, so that the phenomenon that an overlong rigid threaded pipe structure occupies the compression space of the energy absorption box can be avoided, and meanwhile, a nut seat 31 is reduced on the basis of the scheme of the applicant's prior application, so that the trailer hook only needs to be aligned to one nut seat 31 during installation, and the condition that a plurality of nut seats 31 are mutually interfered during matched installation is avoided. The front end of the expansion unit 40 can abut against the bottom of the front anti-collision beam 1 and can expand the through hole within the range of the through hole 20 to limit, so that the expansion unit 40 and the automobile anti-collision beam form a limit, and the condition that local stress is overlarge due to the stress of only a single nut seat 31 is avoided. The scheme of the invention is not only suitable for the trailer hook mounting position in front of the automobile, but also suitable for the trailer hook mounting position in back of the automobile.