CN106739882B - Traction hook and traction device - Google Patents
Traction hook and traction device Download PDFInfo
- Publication number
- CN106739882B CN106739882B CN201611170223.8A CN201611170223A CN106739882B CN 106739882 B CN106739882 B CN 106739882B CN 201611170223 A CN201611170223 A CN 201611170223A CN 106739882 B CN106739882 B CN 106739882B
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- China
- Prior art keywords
- traction
- hole
- towing
- hook
- mounting plate
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60D—VEHICLE CONNECTIONS
- B60D1/00—Traction couplings; Hitches; Draw-gear; Towing devices
- B60D1/01—Traction couplings or hitches characterised by their type
- B60D1/02—Bolt or shackle-type couplings
- B60D1/025—Bolt or shackle-type couplings comprising release or locking lever pins
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60D—VEHICLE CONNECTIONS
- B60D1/00—Traction couplings; Hitches; Draw-gear; Towing devices
- B60D1/24—Traction couplings; Hitches; Draw-gear; Towing devices characterised by arrangements for particular functions
- B60D1/28—Traction couplings; Hitches; Draw-gear; Towing devices characterised by arrangements for particular functions for preventing unwanted disengagement, e.g. safety appliances
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60D—VEHICLE CONNECTIONS
- B60D1/00—Traction couplings; Hitches; Draw-gear; Towing devices
- B60D1/24—Traction couplings; Hitches; Draw-gear; Towing devices characterised by arrangements for particular functions
- B60D1/30—Traction couplings; Hitches; Draw-gear; Towing devices characterised by arrangements for particular functions for sway control, e.g. stabilising or anti-fishtail devices; Sway alarm means
- B60D1/34—Traction couplings; Hitches; Draw-gear; Towing devices characterised by arrangements for particular functions for sway control, e.g. stabilising or anti-fishtail devices; Sway alarm means involving springs
- B60D1/345—Traction couplings; Hitches; Draw-gear; Towing devices characterised by arrangements for particular functions for sway control, e.g. stabilising or anti-fishtail devices; Sway alarm means involving springs the springs being of the bar or leaf type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60D—VEHICLE CONNECTIONS
- B60D1/00—Traction couplings; Hitches; Draw-gear; Towing devices
- B60D1/24—Traction couplings; Hitches; Draw-gear; Towing devices characterised by arrangements for particular functions
- B60D1/42—Traction couplings; Hitches; Draw-gear; Towing devices characterised by arrangements for particular functions for being adjustable
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Hooks, Suction Cups, And Attachment By Adhesive Means (AREA)
Abstract
The invention provides a draw hook and draw gear, draw hook pass one have through-hole draw ring in order to connect with said draw ring through a lockpin, draw hook include: the traction shaft comprises a first circular flange, a second circular flange, a bearing seat, a first mounting plate and a second mounting plate, one side of the first circular flange is fixedly connected with the bell mouth, and the other side of the first circular flange is connected with the first mounting plate through a flexible shaft sleeve; one side of the second round flange facing the bell mouth is connected with the second mounting plate through a flexible shaft sleeve; the first mounting plate and the second mounting plate are positioned on two sides of the bearing seat and are connected through the bearing seat. The traction hook provided by the invention can improve the flexibility of the traction hook after being connected with the traction ring.
Description
Technical Field
The invention relates to the field of trailer connection, in particular to a traction hook and a traction device.
Background
In the prior art, the traction hook is a tool used when a trailer is needed, the traction hole is positioned at the front part of the trailer, the cover plate of the traction hole is pried by a tool such as a screwdriver, and then the traction hook is inserted into the traction hole for tightening, so that the firmness is ensured, and a tire wrench can be sleeved into the traction hook for tightening. There are other types of hitch devices that have been widely used in the field of towing a variety of trailers by a tractor, most of which include a combination of a first connecting portion that is coupled to one vehicle and a second connecting member that is coupled to another vehicle. For the real connection, when the vehicle is connected, the alignment of the connecting parts is required, and the firm connection of the trailer connecting parts is required, so that the combination mode of the connecting parts is critical.
One prior art attachment is that the locking pin of the towing hook is passed through a through hole in the towing loop to attach the towing hook and the towing loop together. However, in the existing structure, large-angle connection of the towing hook and the towing ring is difficult to realize, and the relative positions of the trailer and the towing vehicle are limited by the connection of the towing hook and the towing ring.
The flexibility of the traction hook after being connected with the traction ring is improved, so that the relative position relation of the trailer and the tractor, which are provided with the traction hook and the traction ring, is more flexible
Disclosure of Invention
The invention aims to provide a traction hook and a traction device, which overcome the difficulty in the prior art and can improve the flexibility of the traction hook after being connected with a traction ring.
According to one aspect of the present invention, there is provided a towing hook which passes through a towing ring having a through hole by a lock pin to be connected with the towing ring, the towing hook comprising:
the traction shaft comprises a first circular flange, a second circular flange, a bearing seat, a first mounting plate and a second mounting plate, one side of the first circular flange is fixedly connected with the bell mouth, and the other side of the first circular flange is connected with the first mounting plate through a flexible shaft sleeve; one side of the second round flange facing the bell mouth is connected with the second mounting plate through a flexible shaft sleeve; the first mounting plate and the second mounting plate are positioned on two sides of the bearing seat and are connected through the bearing seat.
Optionally, the first mounting plate is provided with an annular through hole corresponding to the first circular flange; the second mounting plate is provided with an annular through hole corresponding to the second round flange
Optionally, one side of the flexible shaft sleeve is connected to the inner wall of the first circular flange, and the other side of the flexible shaft sleeve is connected to the inner wall of the annular through hole of the first mounting plate; one side of the flexible shaft sleeve is connected to the inner wall of the second circular flange, and the other side of the flexible shaft sleeve is connected to the inner wall of the annular through hole of the second mounting plate.
Optionally, the maximum angle A1 between the axis of the traction ring and the reference axis in a plane perpendicular to the moving direction of the lock pin is 90 degrees to 100 degrees with respect to the axis perpendicular to the plane of the bearing block.
Optionally, the maximum angle A2 between the axis of the traction ring and the reference axis is 30 to 45 degrees in a plane parallel to the moving direction of the lock pin and perpendicular to the plane of the bearing seat, based on the axis perpendicular to the plane of the bearing seat.
Optionally, the towing hook further includes:
the horn mouth is provided with an opening end and a closing end, the opening size of the opening end is larger than that of the closing end, the closing end is connected with the traction shaft, the closing end is provided with two opposite end surfaces, a locking space is formed between the two opposite end surfaces, and the opening end is arranged back to the traction shaft;
a driving mechanism having a driving device and a driving mechanism housing accommodating the driving device, the driving mechanism housing forming a receiving space communicating with the locking space, the driving device controlling the lock pin to move between the receiving space and the locking space, wherein,
the driving mechanism is further provided with a tappet, the tappet extends to the locking space, when the traction ring enters the locking space, the tappet is pushed to rotate around the shaft, the tappet rotates to enable the driving device to control the lock pin to move from the accommodating space to the locking space, and when the traction ring is hung on the traction ring, the greater the rotation angle of the traction ring for pushing the tappet is, the greater the moving distance of the lock pin is; when the traction ring is unhooked, the tappet moves to an initial position along with the removal of the traction ring.
Optionally, one end of the pulling shaft connected with the bell mouth is provided with two opposite first extending parts and second extending parts, the first extending parts and the second extending parts are connected by side walls, the first extending parts and the second extending parts are respectively provided with a first through hole, the two first through holes are concentric, the central connecting line of the two first through holes is perpendicular to the first axis of the pulling shaft, the bell mouth can be rotatably arranged on the pulling shaft around the central connecting line of the first through holes, the closing end is connected with the two extending parts of the pulling shaft, the two end faces of the closing end are respectively provided with a third through hole, the two third through holes are concentric with the first through holes,
wherein, first through-hole with the third through-hole is used for the intercommunication locking space with the accommodation space.
Optionally, the first extension part is further provided with a second through hole, the second through hole is located between the first through hole and the other end of the traction shaft, the tappet passes through the second through hole and is rotatably installed on the driving mechanism around a second axis, the first extension part is located between the second axis and the second extension part, and the second axis is perpendicular to the central connecting line of the first through hole and perpendicular to the first axis.
Optionally, the lock pin includes an arc portion and a cylindrical portion, the outer diameter of the arc portion is larger than the outer diameter of the cylindrical portion, wherein the lock pin enters the locking space and passes through the traction ring, and when the traction ring is perpendicular to the axial direction of the lock pin, a minimum distance t1 between the outer wall of the arc portion and the inner wall of the traction ring is smaller than a distance t between the outer wall of the cylindrical portion and the inner wall of the traction ring.
According to yet another aspect of the present invention, there is also provided a traction device including: a towing hook as described above; and a towing ring having a through hole for passing a lock pin of the towing hook therethrough to be connected with the towing hook, wherein the towing hook and the towing ring are mounted to a rear portion of the towing vehicle and a front end of the trailer, respectively.
Due to the use of the above technology, the invention has the following advantages compared with the prior art:
1) According to the invention, the circular flange and the flexible shaft sleeve are arranged at the other end of the traction shaft, so that the large-angle connection of the traction hook and the traction ring can be realized, the flexibility of the traction hook after being connected with the traction ring is improved, and the relative position relationship between the tractor and the trailer for installing the traction hook and the traction ring is more flexible;
2) According to the invention, the tappet is arranged in the bell mouth locking space and is pushed by the end part of the traction ring, and the tappet rotates around a shaft to control the lock pin to move between the accommodating space and the locking space, and as the moving distance of the lock pin is related to the rotating angle of the tappet, the special-angle hanging and unhooking of the traction ring can be realized, and the lock pin can be prevented from falling down due to accidental touch of the traction ring;
3) According to the invention, the shape of the lock pin is arranged, so that the gap between the lock pin and the inner wall of the through hole of the traction ring is relatively smaller, the impact force between the lock pin and the traction ring is reduced, and the contact area of the lock pin on the inner wall of the through hole of the traction ring can be increased under the inclination angle of the traction ring, so that the traction hook can bear larger traction force, and the traction hook has longer service life.
Drawings
The technical scheme of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments so as to make the characteristics and advantages of the present invention more apparent.
FIG. 1 is a perspective view of a traction device according to an embodiment of the present invention;
FIG. 2 is a right side view of a traction device according to an embodiment of the present invention;
FIG. 3 is a right side cross-sectional view of a traction device according to an embodiment of the present invention;
FIG. 4A is a right side view of another state of a tow hook according to an embodiment of the present invention;
FIG. 4B is a right side view of yet another state of the traction device according to an embodiment of the present invention;
FIG. 5A is a right side view of yet another state of a tow hook according to an embodiment of the present invention;
FIG. 5B is a front view partially in cross section of a further state of a towing hook, in accordance with an embodiment of the present invention;
FIG. 5C is a partial perspective view of yet another state of a tow hook according to an embodiment of the present invention;
FIG. 6 is an exploded view of a tow hook according to an embodiment of the present invention;
FIG. 7 is a perspective view of a traction axle according to an embodiment of the present invention;
FIG. 8 is a perspective view of a flare according to an embodiment of the present invention;
FIG. 9 is a perspective view of a drive mechanism according to one embodiment of the invention;
FIG. 10 is a schematic view of a coupling angle of a towing hook and towing loop in accordance with an embodiment of the present invention;
FIG. 11 is a schematic view of a traction axle according to an embodiment of the present invention;
FIG. 12 is a schematic view of another attachment angle of a towing hook and towing loop in accordance with an embodiment of the present invention;
FIG. 13 is a schematic view of a tow hook with a cylindrical locking pin according to an embodiment of the present invention;
FIG. 14 is a schematic view of a towing hook with an arcuate latch in accordance with an embodiment of the present invention;
fig. 15 is a schematic view of a tow hook with another state of an arcuate latch according to an embodiment of the present invention.
Reference numerals
1. The cylindrical portion of the traction shaft 42
11. Concave portion of first extension 43
111. First through hole 691 first circular flange
112. Second through hole 692 second circular flange
12. Second extension 61 bearing seat
121. First mounting plate of first through hole 693
13. First axis 694 second mounting plate
14. Another end 695 of the traction shaft is a first shaft sleeve
141. Fifth through hole 696 second sleeve
142. Groove 7 base assembly
2. Horn 9 traction ring
21. Open end 91 through hole
22. Closing end 37 control rod
221. End face 38 connecting hole site
222. Third through hole 39 indicator
23. Locking space
3. Driving mechanism
31. Driving mechanism shell
311. Accommodating space
32. Tappet rod
321. A second axis
33. Handle
35. Spring
4. Lock pin
41. Arc-shaped part
Detailed Description
Hereinafter, embodiments of the present invention will be described in detail. While the invention will be described and illustrated in conjunction with certain specific embodiments, it will be understood that it is not intended to limit the invention to these embodiments alone. On the contrary, the invention is intended to cover modifications and equivalent arrangements included within the scope of the appended claims.
In addition, numerous specific details are set forth in the following description in order to provide a better illustration of the invention. It will be understood by those skilled in the art that the present invention may be practiced without these specific details. In other instances, well-known structures and components have not been described in detail in order to not obscure the present invention.
The structure of the towing apparatus and the towing hook according to an embodiment of the present invention will be described with reference to fig. 1 to 9. FIG. 1 is a perspective view of a traction device according to an embodiment of the present invention; FIG. 2 is a right side view of a traction device according to an embodiment of the present invention; FIG. 3 is a right side cross-sectional view of a traction device according to an embodiment of the present invention; FIG. 4A is a right side view of another state of a tow hook according to an embodiment of the present invention; FIG. 4B is a right side view of yet another state of the traction device according to an embodiment of the present invention; FIG. 5A is a right side view of yet another state of a tow hook according to an embodiment of the present invention; FIG. 5B is a front view partially in cross section of a further state of a towing hook, in accordance with an embodiment of the present invention; FIG. 5C is a partial perspective view of yet another state of a tow hook according to an embodiment of the present invention; FIG. 6 is an exploded view of a tow hook according to an embodiment of the present invention; FIG. 7 is a perspective view of a traction axle according to an embodiment of the present invention; FIG. 8 is a perspective view of a flare according to an embodiment of the present invention; fig. 9 is a perspective view of a driving mechanism according to an embodiment of the present invention.
As shown in fig. 1 to 9, the present invention provides a traction apparatus including a traction hook and a traction ring 9 having a through hole 91. The traction hook comprises a traction shaft 1, a bell mouth 2, a driving mechanism 3 and a lock pin 4.
The structure of the traction shaft 1 can be seen in fig. 7, wherein one end of the traction shaft 1 is provided with two opposite first and second extensions 11, 12. The first extension 11 and the second extension 12 are connected by a side wall 17. The first extension 11 and the second extension 12 are provided with a first through hole 111, 121, respectively. The two first through holes 111, 121 are concentric, and the center line of the two first through holes 111, 121 is perpendicular to the first axis 13 of the traction axle 1. The first axis 13 of the traction shaft 1 is the extension direction of the traction shaft 1. The first extension 11 of the traction shaft 1 is further provided with a second through hole 112. The second through hole 112 is located between the first through hole 111 and the other end 14 of the traction shaft 1.
The specific structure of the bell mouth 2 can be seen in fig. 8, and in combination with fig. 1 to 7, the bell mouth 2 is rotatably mounted on the traction shaft 1 about the central line of the first through holes 111, 121. The flare 2 has an open end 21 and a closed end 22. The opening end 21 and the closing end 22 are communicated. The open end 21 has an opening size greater than the opening size of the closed end 22. The open end 21 is disposed away from the traction shaft 1, and the open end 21 is open away from the traction shaft 1. The closing end 22 is connected to the two extensions 11, 12 of the traction shaft 1. The necked-in end 22 has two opposing end surfaces 221. Alternatively, the two opposite end surfaces 221 are connected to the two extensions 11, 12 of the traction shaft 1 by means of a connection structure such as bolts. Optionally, the two opposite end surfaces 221 are located between the two extensions 11, 12 of the traction axle 1. The two opposite end surfaces 221 are respectively provided with a third through hole 222. The two third through holes 222 are concentric with the first through holes 111, 121, and a locking space 23 is formed between the two third through holes 222 (or the two opposite end faces 221).
The drive mechanism 3 is mounted on the first extension 11 of the traction shaft 1. The drive mechanism 3 has a drive device and a drive mechanism housing 31 accommodating the drive device. The driving mechanism housing 31 also forms an accommodating space 311. The receiving space 311 communicates with the locking space 23 of the flare 2 through the first through holes 111, 121 and the third through hole 222. The driving means is used to control the movement of the locking pin 4 between the receiving space 31 and the locking space 23.
The drive mechanism 3 is further provided with a tappet 32. The tappet 32 extends through the second through hole 112 of the first extension 11 to the locking space 23 and is rotatably mounted on the drive mechanism 3 about a second axis 321. The first extension 11 is located between the second axis 321 and the second extension 12. The second axis 321 is perpendicular to the center line of the first through holes 111, 121 and perpendicular to the first axis 13.
A driving means such as a rotation mechanism is optionally provided in the driving mechanism 3, and the tappet 32 rotates to trigger the driving means to apply a force toward the locking space 23 to the lock pin 4 located in the receiving space 31 to move the lock pin 4 to the locking space 23, passing through the through hole 91 of the traction ring 9. The drive mechanism 3 is further provided with a handle 33, a control plate and a spring 35. In one embodiment, the control plate has a hexagonal through hole and the shaft portion of the handle 33 has a hexagonal shape, and the shaft portion of the handle 33 passes through the hexagonal through hole of the control plate to mate with the control plate. The spring 35 is sleeved on the shaft part of the handle 33. The control plate serves as a component of the drive for controlling the movement of the locking pin 4. When the handle 33 is turned, the driving means can also be activated to apply a force to the locking pin 4 located in the receiving space 31 towards the locking space 23 to move the locking pin 4 to the locking space 23 through the through hole 91 of the traction ring 9. The drive mechanism 3 is also provided with a lever 37 for externally operating its internal drive means, which lever is used in cooperation with the control plate, the spring 35 and other parts of the drive means to control the locking pin movement. In some embodiments, the drive mechanism housing 31 is provided with attachment holes 38 for attachment means for adding an upgraded version of the accessory.
In some embodiments, referring to fig. 5A-5C, the drive mechanism 3 is further provided with an indicator 39 indicating the attached state of the locking pin 4, when the towing hook is in the open state, the locking pin 4 moves upward, a recess 43 in the locking pin 4 (e.g., in fig. 3, the recess 43 is located at the end of the locking pin 4 near the drive mechanism 3) is horizontally aligned with the indicator 39, and the indicator lever in the indicator 39 is pushed to protrude outward, so that it is clearly known from the outside that the locking pin 4 is in the open state. When the towing hook is in the closed condition (the lock pin 4 passes through and locks the towing ring 9), the indicating rod in the indicator 39 returns to the inside of the indicator 39, from the outside it is clear that the lock pin 4 has moved down to a specific position and locked the lock pin 4.
The towing hook may further comprise a base assembly 7, the base assembly 7 being adapted to connect the flare 2 with the second extension 12 of the towing shaft 1 and to allow the flare 2 to be reset to an initial state by rotating the flare about the centre line of the first through holes 111, 121.
Specifically, referring to fig. 4A, the initial state of the towing hook is shown without the towing hook attached to the towing loop. The tappet 32 is at an angle B1 to the lock pin movement direction. When the traction ring 9 is hung up, the traction ring 9 enters the locking space 23 and pushes the tappet 32 towards the other end 14 of the traction shaft 1, so that the tappet 32 rotates a certain angle around the second axis 321 towards the other end 14 of the traction shaft 1, the driving device of the trigger driving mechanism 3 controls the lock pin 4 to move from the accommodating space 311 through the first through holes 111, 121, the third through hole 222 and the through hole 91 of the traction ring and lock to the locking space 23. In the present embodiment, the larger the rotation angle of the tappet 32, the larger the moving distance of the lock pin 4. Specifically, the proportional relationship between the rotation angle of the tappet 32 and the movement distance of the lock pin 4 can be adjusted by providing a link mechanism such as a gear and a link in the driving device and by providing a radius of the gear, a length of the link, and the like, which will not be described in detail herein. When the angle B1 is rotated and parallel to the direction of movement of the locking pin 4, the locking pin 4 moves downwards by a distance S, the lower end of the locking pin 4 being located in a through hole (or recess) in the flare 2 and the second extension 12 of the traction shaft 1. A locking structure may also be provided in the drive mechanism 3, which locking structure may lock the locking pin 4 in the locking space. After hanging on the traction ring 9, see fig. 1-3 and 4B. When the traction ring 9 is unhooked, the handle 33 can be turned, and the driving device is triggered, so that the lock pin 4 positioned in the locking space 23 moves to the accommodating space 311, and the lock pin 4 is separated from the through hole 91 of the traction ring 9. Further, when the lock pin 4 is disengaged from the traction ring 9, as the traction ring 9 is moved outward, the tappet 32 is moved to the initial position (rotated to a certain angle, in other words, the tappet 32 is angled B1 with respect to the lock pin moving direction) by the action of the internal spring with the traction ring 9.
Since the moving distance of the lock pin 4 is related to the rotation angle of the tappet 32, it is possible to solve the problem that when the traction ring is hung on a special angle C1 (an angle between the axial direction of the traction ring 9 and the direction perpendicular to the moving direction of the lock pin 4) as shown in fig. 4B, the hanging up of the traction ring 9 is difficult to be completed because the position of the lock pin 4 blocks the end of the traction ring 9. Similarly, the traction hook structure provided by the invention can also realize the unhooking of the traction ring 9 at a special angle. The particular angle described herein means when the angle between the axial direction of the traction ring 9 and the direction perpendicular to the direction of movement of the locking pin 4 is greater than an angle (e.g., 30 degrees). At the same time, the tappet 32 is arranged to prevent the locking pin 4 from falling down due to accidental actuation by the traction ring 9.
A traction axle 1 according to another embodiment of the present invention is described below with reference to fig. 10 to 12. FIG. 10 is a schematic view of one attachment angle of the towing hook and towing loop 9 in accordance with one embodiment of the present invention; fig. 11 is a schematic view of a traction axle 1 according to an embodiment of the invention; fig. 12 is a schematic view of another connection angle of the towing hook and the towing loop 9 in accordance with an embodiment of the present invention.
In this embodiment, a horn mouth 2 and a driving mechanism 3 are mounted on one end of a traction shaft 1. The other end of the traction shaft 6 includes a first circular flange 691, a second circular flange 692, a bearing housing 61, a first mounting plate 693, and a second mounting plate 694.
The first circular flange 691 and the second circular flange 692 have an annular structure. One side of the first circular flange 691 is fixedly connected with the bell mouth 2, and the other side of the first circular flange 691 is connected with the first mounting plate 693 through a flexible shaft sleeve 695. The side of the second circular flange 692 facing the flare 2 is connected to a second mounting plate 694 by a flexible sleeve 696. Optionally, the first mounting plate 693 has an annular through hole corresponding to the first circular flange 691. The second mounting plate 694 has an annular through hole corresponding to the second circular flange 692. One side of the flexible shaft sleeve 695 is connected to the inner wall of the first circular flange 691, and the other side of the flexible shaft sleeve 695 is connected to the inner wall of the annular through hole of the first mounting plate 693. One side of the flexible sleeve 696 is connected to the inner wall of the second circular flange 692, and the other side of the flexible sleeve 696 is connected to the inner wall of the annular through hole of the second mounting plate 694. The first mounting plate 693 and the second mounting plate 694 are located at both sides of the bearing housing 61 and are connected through the bearing housing 61. The bearing housing 61 is used to connect the towing axle 1 and the trailer.
The flexible shaft sleeves 695, 696 are made of a special high-strength material, can ensure the connection between the first circular flange 691 and the first mounting plate 693 and the connection between the second circular flange 692 and the second mounting plate 694, and have good toughness. The first mounting plate 693 and the bearing seat 61, and the second mounting plate 694 and the bearing seat 61 may be connected by bolts.
With the traction shaft 1 of the present embodiment, the maximum connection angle of the traction hooks and the traction rings 9 can be seen in fig. 10 and 12. In fig. 10, the maximum angle A1 achievable between the axis of the traction ring 9 and the reference axis in a plane perpendicular to the lock pin moving direction is 90 degrees to 100 degrees with respect to the axis perpendicular to the plane of the bearing housing 61. In fig. 12, the maximum angle A2 achievable between the axis of the traction ring 9 and the reference axis in a plane parallel to the direction of movement of the lock pin and perpendicular to the plane of the bearing housing 61 is 30 to 45 degrees with respect to the axis perpendicular to the plane of the bearing housing 61.
According to the embodiment, the circular flange and the flexible shaft sleeve are arranged at the other end of the traction shaft 1, so that large-angle connection of the traction hook and the traction ring 9 can be realized, and the flexibility of the traction hook after being connected with the traction ring 9 is improved, so that the relative position relationship between a trailer and a tractor, wherein the traction hook and the traction ring 9 are installed, is more flexible. For example, when the trailer and the towing vehicle are mounted with the towing hook and the towing loop 9 in a position where the difference in height is large, the connection of the towing hook and the towing loop 9 can also be achieved (see fig. 12). As another example, the trailer and tractor may make a large angle turn while traveling (as in fig. 10).
A lock pin according to an embodiment of the present invention is described below with reference to fig. 13 to 15. FIG. 13 is a schematic view of a tow hook with a cylindrical locking pin according to an embodiment of the present invention; FIG. 14 is a schematic view of a towing hook with an arcuate latch in accordance with an embodiment of the present invention; fig. 15 is a schematic view of a tow hook with another state of an arcuate latch according to an embodiment of the present invention.
See first fig. 14 and 15. The traction hook comprises a traction shaft 1, a bell mouth 2, a driving mechanism 3 and a lock pin 4. The traction shaft 1 is connected to the flare 2, and the flare 2 has a locking space 23. After the traction ring 9 enters the locking space 23, the driving mechanism 3 controls the locking pin 4 to enter the locking space 23 and pass through the through hole 91 of the traction ring 9.
The locking pin 4 includes a first portion (e.g., arcuate portion 41) and a second portion (e.g., cylindrical portion 42), the first portion 41 having an outer diameter greater than the outer diameter of the second portion 42. When the lock pin 4 enters the lock space 23 and passes through the through hole 91 of the traction ring 9, and the traction ring 9 is perpendicular to the axial direction (or moving direction) of the lock pin 4, the distance t1 between the outer wall of the first portion 41 and the inner wall of the through hole 91 of the traction ring 9 is smaller than the distance t between the outer wall of the second portion 42 and the inner wall of the through hole 91 of the traction ring 9. Optionally, the axial height of the first portion 41 is equal to the axial height of the traction ring 9.
In contrast to the cylindrical locking pin 4 shown in fig. 13, when the cylindrical locking pin 4 passes through the through hole 91 of the traction ring 9, the clearance between the cylindrical locking pin 4 and the inner wall of the through hole 91 of the traction ring 9 is larger, and during use, a larger impact force is generated between the traction ring 9 and the locking pin 4 due to the existence of the clearance and the change of the vehicle speed. While the arc-shaped portion 41 of the lock pin 4 shown in fig. 14 and 15 has a relatively small clearance with the inner wall of the through hole 91 of the traction ring 9, the impact force between the lock pin 4 and the traction ring 9 can be reduced.
Further in contrast to the cylindrical locking pin 4 shown in fig. 13, with a generally cylindrical locking pin, in the inclined state as shown in fig. 13 and 15, the contact between the traction ring 9 and the locking pin 4 is linear, the contact area is small, the contact point is subjected to a large force, the locking pin 4 is easily damaged at the contact point, and the service life is short. In the inclined state as shown in fig. 13 and 15, the arc-shaped portion 41 of the lock pin 4 shown in fig. 14 and 15 can keep good contact with the inner wall of the through hole 91 of the traction ring 9, has a larger contact surface, can bear larger traction force, and enables the lock pin 4 and the traction ring 9 to have longer service life.
Due to the use of the above technology, the invention has the following advantages compared with the prior art:
1) According to the invention, the circular flange and the flexible shaft sleeve are arranged at the other end of the traction shaft, so that the large-angle connection of the traction hook and the traction ring can be realized, the flexibility of the traction hook after being connected with the traction ring is improved, and the relative position relationship between a trailer and a trailer provided with the traction hook and the traction ring is more flexible;
2) According to the invention, the tappet is arranged in the bell mouth locking space and is pushed by the end part of the traction ring, and the tappet rotates around a shaft to control the lock pin to move between the accommodating space and the locking space, and as the moving distance of the lock pin is related to the rotating angle of the tappet, the special-angle hanging and unhooking of the traction ring can be realized, and the lock pin can be prevented from falling down due to accidental touch of the traction ring;
3) According to the invention, the shape of the lock pin is arranged, so that the gap between the lock pin and the inner wall of the through hole of the traction ring is relatively smaller, the impact force between the lock pin and the traction ring is reduced, and the contact area of the lock pin on the inner wall of the through hole of the traction ring can be increased under the inclination angle of the traction ring, so that the traction hook can bear larger traction force, and the traction hook has longer service life.
The foregoing is merely a specific application example of the present invention, and the protection scope of the present invention is not limited in any way. In addition to the embodiments described above, other embodiments of the invention are possible. All technical schemes formed by equivalent substitution or equivalent transformation fall within the scope of the invention.
Claims (10)
1. A towing hitch, characterized in that it passes through a towing loop (9) with a through hole (91) by means of a locking pin (4) to connect with the towing loop (9), the towing hitch comprising:
the traction shaft (1), the traction shaft (1) comprises a first circular flange (691), a second circular flange (692), a bearing seat (61), a first mounting plate (693) and a second mounting plate (694),
one side of the first circular flange (691) is fixedly connected with the bell mouth (2), and the other side of the first circular flange (691) is connected with the first mounting plate (693) through a flexible shaft sleeve (695);
one side of the second round flange (692) facing the bell mouth (2) is connected with the second mounting plate (694) through a flexible shaft sleeve (696);
the first mounting plate (693) and the second mounting plate (694) are positioned on two sides of the bearing seat (61) and are connected through the bearing seat (61), and the first mounting plate (693) is provided with an annular through hole corresponding to the first circular flange (691); the second mounting plate (694) is provided with an annular through hole corresponding to the second circular flange (692), the axis perpendicular to the plane of the bearing seat (61) is taken as a reference, and the maximum angle A1 between the axis of the traction ring (9) and the reference axis is 90-100 degrees in the plane perpendicular to the moving direction of the lock pin (4).
2. The hitch of claim 1, in which the hook includes,
one side of the flexible shaft sleeve (695) is connected to the inner wall of the first circular flange (691), and the other side of the flexible shaft sleeve (695) is connected to the inner wall of the annular through hole of the first mounting plate (693);
one side of the flexible shaft sleeve (696) is connected to the inner wall of the second circular flange (692), and the other side of the flexible shaft sleeve (696) is connected to the inner wall of the annular through hole of the second mounting plate (694).
3. A towing hook as claimed in claim 1, characterized in that the maximum angle A2 between the axis of the towing ring (9) and the reference axis is 30 to 45 degrees in a plane parallel to the direction of movement of the locking pin (4) and perpendicular to the plane of the bearing block (61), with reference to the axis perpendicular to the plane of the bearing block (61).
4. A draw hook according to any one of claims 1 to 3, wherein the draw hook further comprises:
the horn mouth (2), the horn mouth (2) is provided with an opening end (21) and a closing end (22), the opening size of the opening end (21) is larger than that of the closing end (22), the closing end (22) is connected with the traction shaft (1), the closing end (22) is provided with two opposite end surfaces (221), a locking space (23) is formed between the two opposite end surfaces (221), and the opening end (21) is arranged opposite to the traction shaft (1);
a driving mechanism (3), the driving mechanism (3) having a driving device and a driving mechanism housing (31) accommodating the driving device, the driving mechanism housing (31) forming a receiving space (311) communicating with the locking space (23), the driving device controlling the lock pin (4) to move between the receiving space (311) and the locking space (23), wherein,
the driving mechanism (3) is further provided with a tappet (32), the tappet (32) extends to the locking space (23), when the traction ring (9) enters the locking space (23), the tappet (32) is pushed to rotate around the shaft, and the tappet (32) rotates to enable the driving device to control the lock pin (4) to move from the accommodating space (311) to the locking space (23) and penetrate through the through hole (91) of the traction ring (9).
5. The hitch of claim 4, in which,
when the traction ring (9) is hung on the lifter, the larger the rotation angle of the traction ring (9) pushing the tappet (32), the larger the moving distance of the lock pin (4);
when the traction ring (9) is unhooked, the tappet (32) moves to an initial position along with the removal of the traction ring (9).
6. A towing hook as claimed in claim 4, characterized in that the end of the towing axle (1) connected to the bell mouth (2) is provided with two opposite first extensions (11) and second extensions (12), the first extensions (11) and the second extensions (12) being connected by means of side walls (17), the first extensions (11) and the second extensions (12) being provided with a first through hole (111, 121), respectively, the two first through holes (111, 121) being concentric, and the centre line of the two first through holes (111, 121) being perpendicular to the first axis (13) of the towing axle (1).
7. The towing hook according to claim 6, characterized in that the bell mouth (2) is rotatably mounted on the towing axle (1) about the centre line of the first through-hole (111, 121), the closing end (22) being connected to two extensions (11, 12) of the towing axle (1), the closing end (22) being provided with a third through-hole (222) on each of the two end faces (221) of the closing end (22), the two third through-holes (222) being concentric with the first through-hole (111, 121),
wherein the first through hole (111, 121) and the third through hole (222) are used for communicating the locking space (23) and the accommodating space (311).
8. A towing hook as claimed in claim 6, characterized in that the first extension part (11) is further provided with a second through hole (112), the second through hole (112) being located between the first through hole of the first extension part (11) and the other end (14) of the towing shaft (1), the tappet (32) passing through the second through hole (112) and being rotatably mounted on the driving mechanism (3) about a second axis (321), the first extension part (11) being located between the second axis (321) and the second extension part (12), the second axis (321) being perpendicular to the centre line of the first through holes (111, 121) and perpendicular to the first axis (13).
9. The hitch of claim 4, in which,
the lock pin (4) comprises an arc-shaped part (41) and a cylindrical part (42), wherein the outer diameter of the arc-shaped part (41) is larger than the outer diameter of the cylindrical part (42),
when the lock pin (4) enters the locking space (23) and passes through the traction ring (9) and the traction ring (9) is perpendicular to the axial direction of the lock pin (4), the minimum distance t1 between the outer wall of the arc-shaped part (41) and the inner wall of the through hole (91) of the traction ring (9) is smaller than the distance t between the outer wall of the cylindrical part (42) and the inner wall of the through hole (91) of the traction ring (9).
10. A traction device, comprising:
the tow hook of any one of claims 1 to 9; and
a pulling ring (9) having a through hole (91) for the latch (4) of the pulling hook to pass through for connection with the pulling hook, wherein,
the towing hook and the towing loop (9) are mounted to the rear of the towing vehicle and the front end of the trailer, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611170223.8A CN106739882B (en) | 2016-12-16 | 2016-12-16 | Traction hook and traction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611170223.8A CN106739882B (en) | 2016-12-16 | 2016-12-16 | Traction hook and traction device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106739882A CN106739882A (en) | 2017-05-31 |
| CN106739882B true CN106739882B (en) | 2023-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611170223.8A Active CN106739882B (en) | 2016-12-16 | 2016-12-16 | Traction hook and traction device |
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| Country | Link |
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| CN (1) | CN106739882B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114212155A (en) * | 2021-11-09 | 2022-03-22 | 中车长江运输设备集团有限公司 | Automobile train |
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|---|---|---|---|---|
| EP0457249A2 (en) * | 1990-05-14 | 1991-11-21 | ROCKINGER Spezialfabrik für Anhängerkupplungen GmbH & Co. | Trailer coupling key word: securing device with mechanical play |
| WO1994022683A1 (en) * | 1993-03-30 | 1994-10-13 | Rockinger Spezialfabrik für Anhängerkupplungen GmbH & Co | Trailer hitch |
| CN2245007Y (en) * | 1996-01-15 | 1997-01-15 | 王应柏 | Shock absorber for automobile towing hook |
| CN202413310U (en) * | 2012-01-21 | 2012-09-05 | 陕西重型汽车有限公司 | Improved bidirectional buffer type towing hook assembly |
| CN202896189U (en) * | 2012-10-22 | 2013-04-24 | 安徽江淮汽车股份有限公司 | Anti-loose drive shaft locking structure |
| CN203032314U (en) * | 2013-01-24 | 2013-07-03 | 佛山市何氏协力机械制造有限公司 | Trailer automatic dragging device |
| CN206633733U (en) * | 2016-12-16 | 2017-11-14 | 约斯特（中国）汽车部件有限公司 | Draw hook and draw-gear |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7963544B2 (en) * | 2008-11-10 | 2011-06-21 | Barry Harlin | Self-locking, universal trailer hitch and method of use thereof |
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2016
- 2016-12-16 CN CN201611170223.8A patent/CN106739882B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0457249A2 (en) * | 1990-05-14 | 1991-11-21 | ROCKINGER Spezialfabrik für Anhängerkupplungen GmbH & Co. | Trailer coupling key word: securing device with mechanical play |
| WO1994022683A1 (en) * | 1993-03-30 | 1994-10-13 | Rockinger Spezialfabrik für Anhängerkupplungen GmbH & Co | Trailer hitch |
| CN2245007Y (en) * | 1996-01-15 | 1997-01-15 | 王应柏 | Shock absorber for automobile towing hook |
| CN202413310U (en) * | 2012-01-21 | 2012-09-05 | 陕西重型汽车有限公司 | Improved bidirectional buffer type towing hook assembly |
| CN202896189U (en) * | 2012-10-22 | 2013-04-24 | 安徽江淮汽车股份有限公司 | Anti-loose drive shaft locking structure |
| CN203032314U (en) * | 2013-01-24 | 2013-07-03 | 佛山市何氏协力机械制造有限公司 | Trailer automatic dragging device |
| CN206633733U (en) * | 2016-12-16 | 2017-11-14 | 约斯特（中国）汽车部件有限公司 | Draw hook and draw-gear |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106739882A (en) | 2017-05-31 |
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