Anti-falling structure of tow hook

Abstract

The utility model discloses a tow hook anti-falling structure which comprises a locking piece, the locking piece comprises a fixing plate and an elastic piece, the fixing plate is provided with a first positioning part connected with a connecting piece and a second positioning part connected with the elastic piece, and the other end of the elastic piece abuts against a hook body so that the elastic piece and the hook body can define a receding area; the first positioning part is located in the center of the fixing plate, and the second positioning part is located at the end of the fixing plate. When the tow hook is used, after the elastic piece abuts against the hook body, the tow rope is limited in the receding area, and therefore the tow rope is prevented from falling off after being separated from the hook body. The fixing plate is provided with the first positioning part and the second positioning part which are used for positioning the whole fixing plate and the elastic piece respectively, the first positioning part is located in the center of the fixing plate, the second positioning part is located at the end of the fixing plate, and the fixing position of the elastic piece and the fixing position of the fixing plate are not located at the same position. And unstable positioning of the elastic piece or the fixing plate caused by stress concentration is avoided, so that the stress stability and the use stability of the anti-falling structure are improved.

Description

Technical Field

[0001] The present application belongs to the field of trailer hooks, and specifically relates to an anti-detachment structure of a trailer hook. Background Art

[0002] In the process of vehicle manufacturing and use, the trailer hook is a commonly used connection device used to connect the tractor and the towed vehicle. As a key component of the trailer hook, the spring locking spring plays a locking role to prevent the tow rope from being dislocated and ensure safety during the towing process. In the prior art, the spring locking spring has the fixed end of the spring and the center of the component in the same straight line, which is easy to cause stress concentration and is not conducive to the overall force stability of the spring locking spring. Utility Model Content

[0003] The present application provides a trailer hook anti-drop structure to prevent the tow rope from falling off and to avoid stress concentration that may cause unstable positioning of the anti-drop structure.

[0004] The technical solution adopted in this application is:

[0005] A trailer hook anti-slip structure, the trailer hook includes a hook body and a connecting piece in the shape of a hook, one end of the connecting piece is connected to the hook body, and the other end is connected to the vehicle body, the anti-slip structure includes a locking piece, the locking piece includes a fixing plate and a spring sheet, the fixing plate is provided with a first positioning portion connected to the connecting piece and a second positioning portion connected to the spring sheet, the other end of the spring sheet abuts the hook body so that the spring sheet and the hook body are enclosed to form an air avoidance zone, the first positioning portion is located at the center position of the fixing plate, and the second positioning portion is located at the end of the fixing plate.

[0006] In a preferred implementation of the trailer hook anti-detachment structure, the spring piece includes a positioning section connected to the second positioning portion and a movable section abutting against the hook body, and an angle is provided at the connection between the positioning section and the movable section.

[0007] In a preferred implementation of the trailer hook anti-detachment structure, the connecting piece is provided with a protrusion, a positioning hole is provided in the hollow of the protrusion, and the first positioning portion is provided with a matching connecting portion adapted to the protrusion or the positioning hole.

[0008] In a preferred implementation of the trailer hook anti-detachment structure, the mating connection portion includes a limiting ring, which is sleeved on the outside of the protrusion and abuts against the outer wall of the protrusion.

[0009] In a preferred implementation of the trailer hook anti-detachment structure, the mating connection portion includes a fastening opening adapted to the positioning hole, and the fastening opening is aligned and connected to the positioning hole.

[0010] In a preferred implementation of the trailer hook anti-slip structure, the anti-slip structure further includes a fastener connecting the fixing plate and the connecting piece.

[0011] In a preferred implementation of the trailer hook anti-slip structure, a vertical projection of the movable segment at least partially falls into the positioning hole.

[0012] In a preferred implementation of the trailer hook anti-detachment structure, the fixing plate has a thickness of 1.2 mm.

[0013] In a preferred implementation of the trailer hook anti-detachment structure, the fixing plate and the spring piece are integrally formed of 60Si2Mn material.

[0014] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0015] (1) Through the anti-slip structure, when the trailer hook is used, after the spring sheet contacts the hook body, the tow rope is limited in the avoidance zone, thereby preventing the tow rope from falling off the hook body. The fixing plate is provided with a first positioning portion and a second positioning portion, which respectively position the fixing plate as a whole and the spring sheet, and the first positioning portion is located at the center of the fixing plate, and the second positioning portion is located at the end of the fixing plate, so that the fixing position of the spring sheet and the fixing position of the fixing plate are not at the same place, avoiding stress concentration and causing unstable positioning of the spring sheet or the fixing plate, thereby improving the force stability and use stability of the anti-slip structure.

[0016] (2) The spring piece is provided with a positioning section and a movable section. The movable section abuts against the hook body to limit the circumferential position of the tow rope to prevent the tow rope from falling, and the mobility of the movable section facilitates the operator to fasten or remove the tow rope. The positioning section is fixed to the fixing plate to limit the range of movement of the movable section connected thereto to prevent the movable section from moving too far and thus failing to effectively limit the tow rope.

[0017] (3) The spring piece can be fixed to the first positioning portion by means of a fixing plate or by means of alignment and fastening. The method of fixing the locking member is determined according to the shape of the connecting member and the convenience of installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0019] Figure 1 This is a schematic structural diagram of a trailer hook in one embodiment of the utility model;

[0020] Figure 2 This is a structural schematic diagram of a locking member in an embodiment of the utility model;

[0021] Figure 3 This is a schematic diagram of the coordination structure of the anti-slip structure in one embodiment of the utility model;

[0022] Figure 4It is a schematic diagram of the coordination structure of the anti-slip structure in another embodiment of the utility model.

[0023] Description of reference numerals:

[0024] 1-trailer hook, 11-hook body, 12-connecting piece, 121-protrusion, 122-positioning hole;

[0025] 2-locking member, 21-fixing plate, 211-first positioning portion, 212-second positioning portion, 213-limiting ring, 214-fastening opening, 22-spring sheet, 221-movable section, 222-positioning section, 23-fastener;

[0026] 3- Avoid airspace. DETAILED DESCRIPTION

[0027] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0028] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below. It should be noted that the embodiments of the present application and the features in each embodiment may be combined with each other without conflict.

[0029] In addition, in the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0030] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0031] In the present application, unless otherwise clearly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0032] The present application provides a trailer hook anti-drop structure, such as Figures 1 to 4 As shown, the trailer hook 1 includes a hook body 11 and a connecting member 12 in the shape of a hook, one end of the connecting member 12 is connected to the hook body 11, and the other end is connected to the vehicle body, the anti-slip structure includes a locking member 2, the locking member 2 includes a fixing plate 21 and a spring sheet 22, the fixing plate 21 is provided with a first positioning portion 211 connected to the connecting member 12 and a second positioning portion 212 connected to the spring sheet 22, the other end of the spring sheet 22 abuts against the hook body 11 so that the spring sheet 22 and the hook body 11 are enclosed to form an air avoidance area 3, the first positioning portion 211 is located at the center position of the fixing plate 21, and the second positioning portion 212 is located at the end of the fixing plate 21.

[0033] Through the anti-slip structure, when the trailer hook 1 is used, after the spring sheet 22 abuts against the hook body 11, the tow rope is limited in the avoidance area 3, thereby preventing the tow rope from falling off the hook body 11. The fixing plate 21 is provided with a first positioning portion 211 and a second positioning portion 212, which respectively position the fixing plate 21 as a whole and the spring sheet 22, and the first positioning portion 211 is located at the center of the fixing plate 21, and the second positioning portion 212 is located at the end of the fixing plate 21, so that the fixing position of the spring sheet 22 is not at the same place as the fixing position of the fixing plate 21, thereby avoiding stress concentration and causing unstable positioning of the spring sheet 22 or the fixing plate 21, thereby improving the force stability and use stability of the anti-slip structure.

[0034] like Figure 2 As shown, in one embodiment, the spring piece 22 includes a positioning segment 222 connected to the second positioning portion 212 and a movable segment 221 abutting against the hook body 11 , and an angle is provided at the connection between the positioning segment 222 and the movable segment 221 .

[0035] The spring piece 22 is provided with a positioning section 222 and a movable section 221. The movable section 221 abuts against the hook body 11 to limit the circumferential position of the towing rope to prevent the towing rope from falling, and the mobility of the movable section 221 facilitates the operator to fasten or remove the towing rope. The positioning section 222 is fixed to the fixing plate 21 to limit the range of movement of the movable section 221 connected thereto, so as to prevent the movable section 221 from having an excessively large range of movement and thus failing to effectively limit the towing rope.

[0036] The connection between the positioning section 222 and the movable section 221 is provided with an angle, and the movable section 221 is bent toward the hook body 11 to disperse the force. It is also understandable that the positioning section 222 and the movable section 221 can be integrally formed to improve the structural strength and prevent the spring 22 from breaking when subjected to a large tensile force.

[0037] Furthermore, the connecting member 12 is provided with a protrusion 121 , a positioning hole 122 is hollowly provided in the protrusion 121 , and the first positioning portion 211 is provided with a matching connecting portion adapted to the protrusion 121 or the positioning hole 122 .

[0038] It should be noted that there are many ways to fix the fixing plate 21. In one embodiment, Figure 3 As shown, the mating connection portion includes a limiting ring 213 , which is sleeved on the outside of the protrusion 121 and abuts against the outer wall of the protrusion 121 .

[0039] In another embodiment, if Figure 4 As shown, the mating connection portion includes a fastening opening 214 adapted to the positioning hole 122 , and the fastening opening 214 is aligned and connected to the positioning hole 122 .

[0040] Furthermore, the anti-slip structure also includes a fastener 23 connecting the fixing plate 21 and the connecting member 12 .

[0041] Through the above two embodiments, the spring piece 22 can be fixed to the first positioning portion 211 by the fixing plate 21, or fixed by alignment and fastening. The method of fixing the locking member 2 is determined according to the shape of the connecting member 12 and the convenience of installation.

[0042] Preferably, the projection of the movable segment 221 in the vertical direction at least partially falls into the positioning hole 122. Since the movable segment 221 is fixed to the end of the fixed plate 21, and its projection is set to at least partially fall into the positioning hole 122, the movable segment 221 extends inward from the end of the fixed plate 21 to form an arc shape, thereby forming a nearly circular clearance zone 3 together with the hook body 11, and the hook rope is limited in the clearance zone 3.

[0043] Preferably, the fixing plate 21 has a thickness of 1.2 mm. The fixing plate 21 has a certain thickness so as to improve its locking force. If the fixing plate 21 is too thin, it is light in weight and may be easily deformed or may be separated from the fixed position when subjected to a large force. If the fixing plate 21 is too thick, it may result in a large force required for fixing, which may easily lead to unstable fixing and increase the manufacturing cost.

[0044] Preferably, the fixing plate 21 and the spring piece 22 are integrally formed of 60Si2Mn material to improve the durability of the fixing plate 21 material.

[0045] In addition, the locking anti-slip structure in the prior art is mostly applicable to straight-out trailer hooks 1, and the anti-slip structure of the present application is also applicable to the use of flat-head trailer hooks 1. When the anti-slip structure of the present application is in use, the fixing plate 21 is detachably fixedly connected to the connecting member 12. Before the connection and positioning, the fixing plate 21 is rotated to a state where the spring sheet 22 and the hook body 11 are in abutment with each other, and then the fixing plate 21 is fixed to the connecting member 12. Due to the material characteristics of the spring sheet 22, when in use, the spring sheet 22 is manually pushed aside to hang the tow rope on the hook body 11, and then the spring sheet 22 is restored to abutment with the hook body 11, so that the tow rope hung on the hook body 11 is located in the avoidance area 3 formed by the spring sheet 22 and the hook body 11, to prevent the tow rope from falling. And because the fixing plate 21 of the present solution is detachable, the fixing plate 21 can be replaced according to actual application requirements to adapt to trailer hooks 1 of different sizes.

[0046] In addition, it should be noted that the abutment between the spring piece 22 and the hook body 11 may be that the end of the spring piece 22 abuts against the outer wall of the hook body 11 , or the end of the hook body 11 abuts against the outer wall of the spring piece 22 .

[0047] Furthermore, in the embodiment where the end of the hook body 11 abuts against the outer wall of the spring sheet 22, the spring sheet 22 is provided in a groove adapted to the end of the hook body 11. During assembly, the end of the hook body 11 is inserted into the groove to enhance the abutment stability between the two.

[0048] Anything not described in this application can be achieved by adopting or drawing on existing technologies.

[0049] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0050] The above is only the embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A trailer hook anti-drop structure, the trailer hook comprises a hook body and a connecting piece in the shape of a hook, one end of the connecting piece is connected to the hook body, and the other end is connected to the vehicle body, characterized in that: The anti-slip structure includes a locking piece, which includes a fixing plate and a spring sheet. The fixing plate is provided with a first positioning portion connected to the connecting piece and a second positioning portion connected to the spring sheet. The other end of the spring sheet abuts against the hook body so that the spring sheet and the hook body form an air avoidance zone. The first positioning portion is located at the center of the fixing plate, and the second positioning portion is located at the end of the fixing plate.

2. The trailer hook anti-drop structure according to claim 1, characterized in that: The spring sheet comprises a positioning section connected to the second positioning portion and a movable section abutting against the hook body, and an angle is arranged at a connection between the positioning section and the movable section.

3. The trailer hook anti-detachment structure according to claim 2, characterized in that: The connecting piece is provided with a protrusion, a positioning hole is provided in the hollow of the protrusion, and the first positioning portion is provided with a matching connecting portion adapted to the protrusion or the positioning hole.

4. The trailer hook anti-detachment structure according to claim 3, characterized in that: The mating connection portion includes a limiting ring, which is sleeved on the outside of the protrusion and abuts against the outer wall of the protrusion.

5. The trailer hook anti-detachment structure according to claim 3, characterized in that: The matching connection portion includes a fastening opening adapted to the positioning hole, and the fastening opening is aligned and connected to the positioning hole.

6. A trailer hook anti-detachment structure according to claim 4 or claim 5, characterized in that: The anti-slip structure also includes a fastener connecting the fixing plate and the connecting member.

7. The trailer hook anti-detachment structure according to claim 3, characterized in that: The vertical projection of the movable segment at least partially falls into the positioning hole.

8. The trailer hook anti-detachment structure according to claim 1, characterized in that: The fixing plate has a thickness of 1.2 mm.

9. The trailer hook anti-drop structure according to claim 1, characterized in that: The fixing plate and the spring piece are integrally formed by using 60Si2Mn material.

Images