CN215850597U

CN215850597U - Car rear towing hook with locking mechanism

Info

Publication number: CN215850597U
Application number: CN202121232004.4U
Authority: CN
Inventors: 赵航; 李宏; 鞠思宇; 吕传志
Original assignee: Nanjing Iveco Automobile Co Ltd
Current assignee: Nanjing Iveco Automobile Co Ltd
Priority date: 2021-06-03
Filing date: 2021-06-03
Publication date: 2022-02-18
Anticipated expiration: 2031-06-03

Abstract

The utility model relates to the technical field of vehicle parts, in particular to an automobile rear towing hook with a locking mechanism. The rear towing hook comprises a hook body, a locking mechanism matched with the hook body and a towing hook seat used for bearing the hook body and the locking mechanism; the towing hook seat is provided with a bottom plate, a left side wall and a right side wall which correspond to each other are arranged on the bottom plate, and a locking wall is connected between the left side end and the right side end of each of the left side wall and the right side wall; an opening is formed between the other side ends of the left side wall and the right side wall, a hook body mounting seat is arranged at the top of the opening, a hook body is mounted on the hook body mounting seat through a pin shaft, an arc-shaped hook is arranged on one side of the hook body, a connecting plate is arranged on the other side of the hook body, and adjacent ratchets and tooth grooves are formed in the end part of the connecting plate; a locking mechanism matched with the ratchet and the tooth socket is arranged in the room-type space of the towing hook seat; the rear trailer hook is arranged on a frame beam through a bottom plate. The rear towing hook integrates the advantages of a totally enclosed type towing hook and an open type towing hook, can avoid the unhooking phenomenon, improves the safety during towing, is easy to operate, and is firm and reliable to install.

Description

Car rear towing hook with locking mechanism

Technical Field

The utility model relates to the technical field of vehicle parts, in particular to an automobile rear towing hook with a locking mechanism.

Background

The rear towing hook is a part frequently used by automobiles and is a device which is convenient for another automobile to drag the automobile when the automobile breaks down in the driving process or falls into a pit. When in dragging, the traction rope needs to be conveniently fixed on the towing hooks at the front part and the tail part of the vehicle, so that the vehicle is convenient to drag. The existing automobile rear towing hook in the market is mainly divided into a totally enclosed type and an open type according to the structure of a hook body. The open type rear towing hook has the defect that the towing rope is easy to unhook when losing tension, and the totally-enclosed type towing hook has the defect that the towing rope is inconvenient to fix.

SUMMERY OF THE UTILITY MODEL

The utility model aims to: aiming at the problems in the prior art, the automobile rear trailer hook with the locking mechanism is convenient to operate, capable of avoiding the unhooking phenomenon, reliable to use, light in weight and low in cost.

In order to achieve the purpose, the utility model discloses an automobile rear trailer hook with a locking mechanism, which comprises a frame cross beam and is characterized in that: the rear towing hook comprises a hook body, a locking mechanism matched with the hook body and a towing hook seat used for bearing the hook body and the locking mechanism; the towing hook seat is provided with a bottom plate, a left side wall and a right side wall which correspond to each other are arranged on the bottom plate, and a locking wall is connected between the left side end and the right side end of each side wall; the left side wall, the right side wall and the locking wall form a room type space structure on the bottom plate in a surrounding mode; an opening is formed between the other side ends of the left side wall and the right side wall, a hook body mounting seat is arranged at the top of the opening, a hook body is mounted on the hook body mounting seat through a pin shaft, an arc-shaped hook is arranged on one side of the hook body, a connecting plate is arranged on the other side of the hook body, and adjacent ratchets and tooth grooves are formed in the end part of the connecting plate; a locking mechanism matched with the ratchet and the tooth socket is arranged in the house-type space of the towing hook seat, and when the hook body is locked by the locking mechanism, the hook body and the locking wall form a closed state; the rear trailer hook is arranged on a frame cross beam through a bottom plate.

Furthermore, the locking mechanism comprises an operating lever, a spring, a roller, a knurled cylindrical pin and a pin shaft, wherein one end of the operating lever is a handle part, the other end of the operating lever is an installation part, and the installation part is fixedly connected to the inner side walls of the left side wall and the right side wall through the pin shaft; a rectangular through hole is formed in the operating lever close to the handle portion to place the roller, the roller is installed in the operating lever through a knurled cylindrical pin in clearance-free fit with a central hole of the roller, protruding bamboo shoots are arranged on one side, close to the roller, below the operating lever, the periphery of each protruding bamboo shoot contacts with the top of the spring, and the bottom of the spring is clamped and limited by two convex shoulders on the fixedly connected bottom plate.

Furthermore, the operating lever handle part and the operating lever mounting part form an angle range of 140-145 degrees all the time by the vertex of the knurled cylindrical pin, and the operating lever handle part moves up and down by the pin shaft on the operating lever mounting part.

The ratchet hook is characterized by further comprising a limiting baffle, the limiting baffle is positioned on the opening of the left side wall and the opening of the right side wall, the limiting baffle is in contact with a handle part of the operating rod in the locking mechanism and stops the operating rod from moving upwards, when the hook body is locked by the locking mechanism, the handle part of the operating rod is lifted to be in contact with the limiting baffle so that the ratchet is inserted into the rectangular through hole of the operating rod, and meanwhile, the operating rod is automatically driven by the spring to clamp the roller in the tooth socket.

Furthermore, the pin shafts are all flat-head pins, and a cotter pin is installed on one end of each flat-head pin through a radial hole.

Furthermore, the room-type space structure enclosed by the left side wall, the right side wall and the locking wall is positioned in the middle of the bottom plate, the left side and the right side of the bottom plate are provided with symmetrical open balance platform areas, and the open platform areas are correspondingly provided with triangular reinforcing ribs which are integrally connected with and support the left side wall and the right side wall.

Furthermore, the upper corners of the bottom plate form arc-shaped transition, the inner sides of the four corners are respectively provided with four fixing holes and hole-edge bosses of the fixing holes, and the towing hook seat is fixedly connected to the frame cross beam through the four fixing holes by fasteners.

And further, the hook body mounting seat is integrally cast with the left side wall and the right side wall, and the left side wall, the right side wall, the locking wall, the two convex shoulders, the fixing hole and a hole edge boss of the fixing hole are integrally cast with the bottom plate.

The utility model has the beneficial effects that: the towing hook seat and the hook body are respectively of a casting structure and a forging structure, the strength is reliable, and the towing hook seat is connected with the frame cross beam and can bear larger traction force; the rear towing hook is provided with the locking mechanism, so that the problem of unhooking in the towing process of the vehicle can be effectively avoided, and the locking mechanism is driven by a spring and is simple to operate; the roller is arranged on the operating lever through the knurled cylindrical pin which is in clearance-free fit with the central hole of the roller, and the roller is arranged outside the knurled cylindrical pin on the operating lever, so that friction when the knurled cylindrical pin is contacted with the hook body can be reduced, and the unlocking of the locking mechanism is convenient to operate.

Drawings

The utility model will be further described with reference to the accompanying drawings.

Fig. 1 is a schematic sectional structure diagram of the present invention.

Fig. 2 is a schematic sectional view of the present invention.

Fig. 3 is a schematic structural view of the drag hook seat of the utility model.

Fig. 4 is a schematic view of the hook body structure of the utility model.

Fig. 5 is a schematic structural view of the operating rod and its upper parts.

Fig. 6 is a schematic view of the installation of the utility model and the frame cross member.

Wherein: h-frame cross beam, A-rear towing hook, 1-hook body, 11-ratchet, 12-tooth socket, 2-towing hook seat, 21-bottom plate, 211-shoulder, 212-balance table exposed area, 213-reinforcing rib, 214-fixing hole, 215-hole edge boss, 22-left and right side walls, 23-locking wall, 24-hook body mounting seat, 3-flat head pin, 4-operating rod, 41-handle part, 42-rectangular through hole, 43-protruding bamboo shoot, 5-spring, 6-roller, 7-knurled cylindrical pin and 8-limit baffle.

Detailed Description

Example one

A basic structure of an automobile rear tow hook with a locking mechanism of the first embodiment is shown in fig. 1-6, and comprises a frame beam H, a rear tow hook a comprises a hook body 1, a locking mechanism matched with the hook body 1, and a tow hook seat 2 for bearing the hook body 1 and the locking mechanism; the towing hook seat 2 is provided with a bottom plate 21, a left side wall 22 and a right side wall 22 are correspondingly arranged on the bottom plate 21, a locking wall 23 is connected between the opposite side ends of the left side wall 22 and the right side wall 22, and the left side wall 22, the right side wall 22 and the locking wall 23 form a room-type space structure on the bottom plate 21, as shown in fig. 3; an opening is formed between the other side ends of the left side wall 22 and the right side wall 22, a hook body mounting seat 24 is arranged at the top of the opening, a hook body 1 is mounted on the hook body mounting seat 24 through a flat head pin 3 in a pin shaft, an arc-shaped hook is arranged on one side of the hook body 1, a connecting plate is arranged on the other side of the hook body 1, and adjacent ratchets 11 and tooth grooves 12 are arranged at the end part of the connecting plate, as shown in fig. 4; a locking mechanism matched with the ratchet 11 and the tooth groove 12 is arranged in the house-shaped space of the towing hook seat 2, and when the hook body 1 is locked by the locking mechanism, the hook body 1 and the locking wall 23 form a closed state; the rear tow hook A is mounted on a frame cross member H through a bottom plate 21.

In the present embodiment, with reference to fig. 1, 2, 5: the locking mechanism comprises an operating lever 4, a spring 5, a roller 6, a knurled cylindrical pin 7 and a pin shaft, wherein one end of the operating lever 4 is a handle part 41, the other end of the operating lever is a mounting part, and the mounting part is fixedly connected to the inner side walls of the left side wall 22 and the right side wall 22 through a flat head pin 3 in the pin shaft; with reference to fig. 5: a rectangular through hole 42 is formed in the operating lever 4 close to one side of the handle part 41 for placing the roller 6, the roller 6 is installed in the operating lever 4 through a knurled cylindrical pin 7 in clearance-free fit with a central hole of the roller 6, the handle part 41 of the operating lever 4 always forms an angle range of 140-145 degrees with an installation part of the operating lever 4 by the vertex of the knurled cylindrical pin 7, and the handle part 41 of the operating lever 4 moves up and down by a pin shaft on the installation part of the operating lever 4; one side of the lower part of the operating lever 4 close to the roller 6 is provided with a protruding bamboo shoot 43, the periphery of the protruding bamboo shoot 43 contacts the top of the spring 5, and the bottom of the spring 5 is clamped and limited by two convex shoulders 211 on the fixedly connected bottom plate 21, as shown in fig. 1 and 2.

In connection with the locking mechanism, the locking mechanism further comprises a limit baffle 8, the limit baffle 8 is positioned on the opening of the left side wall 22 and the opening of the right side wall 22, the limit baffle 8 contacts with the handle part 41 of the operating rod 4 in the locking mechanism and stops the lifting movement of the operating rod 4, when the hook body 1 is locked by the locking mechanism, the handle part 41 of the operating rod 4 is lifted to contact the limit baffle 8, the ratchet 11 is inserted into the rectangular through hole 42 of the operating rod 4, and simultaneously the spring 5 automatically drives the operating rod 4 to clamp the roller 6 in the tooth groove 12, as shown in fig. 1 and 2.

In the embodiment, the pin shafts are all flat head pins 3, and a radial hole is formed in one end of each pin shaft and is used for additionally installing a cotter pin, so that the flat head pins 3 are prevented from falling off; with reference again to FIG. 3: the house type space structure enclosed by the left and right side walls 22 and the locking wall 23 is positioned in the middle of the bottom plate 21, the left and right sides on the bottom plate 21 are provided with symmetrical open platform areas 212, and the open platform area 212 is correspondingly provided with triangular reinforcing ribs 213 which are integrally connected with and support the left and right side walls 22; with reference again to fig. 2 and 3: the upper corners of the bottom plate 21 form arc-shaped transitions, wherein the inner sides of the four corners are respectively provided with four fixing holes 214 and hole edge bosses 215 of the fixing holes 214, and the towing hook seat 2 is fixedly connected to the frame cross member H through the four fixing holes 214 by fasteners, as shown in fig. 6.

To further enhance the robustness and reliability of the device, the hook body mounting seat 24 is integrally cast with the left and right side walls 22, the locking wall 23, the two shoulders 211, the fixing hole 214, and the hole edge bosses 215 of the fixing hole 214 are integrally cast with the bottom plate 21.

The locking mechanism of the rear trailer hook A has the following working principle: when the trailer is in a locking state, the hook body 1 is closed, the handle part 41 is loosened, the spring 5 automatically drives the handle part 41 to enable the knurled cylindrical pin 7 and the roller 6 to be clamped in the tooth groove 12 of the ratchet 11, and the limit baffle 8 on the trailer hook seat 2 is matched to limit the rotation of the hook body 1. When the pulling rope needs to be put in or taken out, the handle part 41 is pressed downwards by hand, the spring 5 is compressed until the roller 6 is disengaged from the tooth slot 12 of the ratchet 11, and the hook body 1 can be opened, namely an unlocking state.

The rear tow hook A provided by the utility model integrates the advantages of a totally enclosed type tow hook and an open type tow hook, can avoid the unhooking phenomenon, improves the safety of a trailer, is easy to operate, and is firm to install, firm and reliable; the reliability is further higher than that of some rear tow couplers in the prior art.

In summary, the utility model relates to a tow hook A behind car with locking mechanism, design benefit, use reliably, have suitable intensity and rigidity, also accord with vehicle parts's research and development production requirement, have passed through experimental and production verification, have also explained the tow hook behind the car and have accorded with the design requirement.

In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention.

Claims

1. The utility model provides a tow hook behind car with locking mechanical system, includes frame cross, its characterized in that: the rear towing hook comprises a hook body, a locking mechanism matched with the hook body and a towing hook seat used for bearing the hook body and the locking mechanism; the towing hook seat is provided with a bottom plate, a left side wall and a right side wall which correspond to each other are arranged on the bottom plate, and a locking wall is connected between the left side end and the right side end of each side wall; the left side wall, the right side wall and the locking wall form a room type space structure on the bottom plate in a surrounding mode; an opening is formed between the other side ends of the left side wall and the right side wall, a hook body mounting seat is arranged at the top of the opening, a hook body is mounted on the hook body mounting seat through a pin shaft, an arc-shaped hook is arranged on one side of the hook body, a connecting plate is arranged on the other side of the hook body, and adjacent ratchets and tooth grooves are formed in the end part of the connecting plate; a locking mechanism matched with the ratchet and the tooth socket is arranged in the house-type space of the towing hook seat, and when the hook body is locked by the locking mechanism, the hook body and the locking wall form a closed state; the rear trailer hook is arranged on a frame cross beam through a bottom plate.

2. The automobile rear trailer hook with the locking mechanism according to claim 1, characterized in that: the locking mechanism comprises an operating lever, a spring, a roller, a knurled cylindrical pin and a pin shaft, wherein one end of the operating lever is a handle part, the other end of the operating lever is an installation part, and the installation part is fixedly connected to the inner side walls of the left side wall and the right side wall through the pin shaft; a rectangular through hole is formed in the operating lever close to the handle portion to place the roller, the roller is installed in the operating lever through a knurled cylindrical pin in clearance-free fit with a central hole of the roller, protruding bamboo shoots are arranged on one side, close to the roller, below the operating lever, the periphery of each protruding bamboo shoot contacts with the top of the spring, and the bottom of the spring is clamped and limited by two convex shoulders on the fixedly connected bottom plate.

3. The automobile rear trailer hook with the locking mechanism according to claim 2, characterized in that: the operating lever handle part forms an angle range of 140 degrees to 145 degrees with the operating lever mounting part through the vertex of the knurled cylindrical pin all the time, and the operating lever handle part moves up and down through a pin shaft on the operating lever mounting part.

4. The automobile rear trailer hook with the locking mechanism according to claim 2, characterized in that: the hook body is locked by the locking mechanism, the handle part of the operating rod is lifted to touch the limit baffle plate, so that a ratchet is inserted into the rectangular through hole of the operating rod, and the spring automatically drives the operating rod to clamp the roller in the tooth socket.

5. The automobile rear tow hook with the locking mechanism according to any one of claims 1, 2, 3 and 4, characterized in that: the pin shafts are all flat-head pins, and one ends of the flat-head pins are radially provided with holes for installing split pins.

6. The automobile rear trailer hook with the locking mechanism according to claim 1, characterized in that: the house type space structure enclosed by the left side wall, the right side wall and the locking wall is positioned in the middle of the bottom plate, the left side and the right side of the bottom plate are provided with symmetrical open platform areas, and the open platform areas are correspondingly provided with triangular reinforcing ribs which are integrally connected with and support the left side wall and the right side wall.

7. The automobile rear trailer hook with the locking mechanism according to claim 1, characterized in that: the upper corners of the bottom plate form arc-shaped transition, the inner sides of the four corners are respectively provided with four fixing holes and hole edge bosses of the fixing holes, and the towing hook seat is fixedly connected to the frame cross beam through the four fixing holes through fasteners.

8. The automobile rear trailer hook with the locking mechanism according to claim 1, characterized in that: the hook body mounting seat is integrally cast with the left side wall and the right side wall, and hole side bosses of the left side wall, the right side wall, the locking wall, the two convex shoulders, the fixing hole and the fixing hole are integrally cast with the bottom plate.