A trailer hitch lock

Abstract

The utility model relates to a trailer hook lock, include: lock shell, the bottom of both sides in lock shell inner wall all runs through has the pivot, the anti -theft eave is fixedly installed in one side of lock shell top, the lock ball part is embedded to the inside of lock shell and is located the below of anti -theaves, the utility model discloses through lock shell and the anti -theft eave accurate cover lock ball part and the connecting gap of lock shell, pivot exposed end and locking part, from the space on the outside tool, such as crowbar, screwdriver directly stretches into lock body core connecting part, avoid the lawbreaker to break down the lock through the raking lock ball part and the junction of lock shell and prevent theft eave's shape and lock ball part appearance adaptation, no obvious convex or gap, reduce the stress point when the violent impact, and lock shell bottom's lock eave and lock seat cooperation, can with the plate piece of vehicle tow hook part steady card in between, realize to the wrapping and fixed of the support hook part, promote the stability of connection, strengthen the overall anti -destruction ability of lock.

Description

Technical Field

[0001] This utility model relates to the technical field of trailer anti-theft locks, specifically to a trailer hook lock. Background Technology

[0002] In modern logistics, engineering construction, and leisure travel, trailers serve as crucial transport vehicles, requiring a rigid connection between the trailer and the towing vehicle via hooks to facilitate movement. Heavy equipment, trailers, and vehicles are typically connected via couplers, for example, to fluid systems or to towing vehicles like trucks. While these items are inherently difficult to steal due to their size and weight, the hooks mounted on or attached to them can become entry points for theft, putting trucks equipped with corresponding trailer hitches at risk of theft.

[0003] Existing trailer hook locks generally use a sliding locking mechanism, resulting in a relatively thin and lightweight overall design that lacks sufficient structural strength and protective features. This makes them extremely easy to break into, allowing criminals to easily damage them through simple prying or impact, thus failing to provide effective protection for users' property. To address this technological deficiency, there is an urgent need to develop a trailer hook lock with a more robust structure, superior anti-theft performance, and wider compatibility. Utility Model Content

[0004] This utility model provides a trailer hook lock to solve the problem of poor anti-theft performance of locks mentioned in the background art.

[0005] To achieve the above-mentioned utility model objectives, the present utility model adopts the following technical solution: a trailer hook lock, comprising:

[0006] A lock case, wherein pivots penetrate the bottom of both sides of the inner wall of the lock case;

[0007] The locking ball is embedded inside the lock housing and located below the anti-theft eaves. One side of the locking ball is rotatably connected to the lock housing via a pivot. The locking ball includes a lock seat. Both sides of the lock seat are provided with shaft holes for connecting with the pivot. An installation ball is engaged on one side of the top of the lock seat and located below the anti-theft eaves.

[0008] A locking part is embedded in one side of the lock housing. The locking part includes a cover plate and a locking pin. The cover plate is fixedly embedded in one side of the lock housing, and a lock cylinder passes through one side of the cover plate and inside the lock housing.

[0009] Lock bezel, which is located on both sides of the bottom of the lock case.

[0010] Preferably, the lock cylinder is unlocked via a combination lock.

[0011] Preferably, the lock cylinder is unlocked by a key, the locking pin is slidably installed inside the lock housing, a limiting hole is formed in the center of the locking pin, and a connecting rod is fixedly installed at one end of the lock cylinder inside the limiting hole.

[0012] Preferably, the top of the connecting rod is in contact with the top of the inner wall of the limiting hole, and the other end of the lock cylinder has a lock hole.

[0013] Preferably, a slot is provided on the other side of the lock base and below the locking part, and the locking pin is located directly above the slot.

[0014] Preferably, the locking pin is adapted to the slot, and a spring is mounted on the top of the locking pin.

[0015] Preferably, a rain cover is installed on the other side of the cover plate.

[0016] Preferably, the fixed connection structure between the lock head and the lock seat is a snap-fit, integral molding, or welding.

[0017] Preferably, the lock head is spherical, cylindrical, or polygonal in shape.

[0018] Preferably, the trailer hook lock also includes an anti-theft visor, which is fixedly installed on one side of the top of the lock housing, and the lock ball is located below the anti-theft visor.

[0019] The advantages of this utility model over the prior art are as follows:

[0020] This trailer hook lock precisely covers the connection gap between the lock ball and the lock shell, the exposed end of the pivot, and the locking part through the lock shell and anti-theft bezel. This spatially blocks external tools, such as pry bars and screwdrivers, from directly reaching into the core connection part of the lock body, preventing criminals from breaking the lock by prying the connection between the lock ball and the lock shell. In addition, the shape of the anti-theft bezel is adapted to the shape of the lock ball, with no obvious protrusions or gaps, reducing the stress points during violent impacts and enhancing the overall resistance to damage of the lock.

[0021] This trailer hook lock is easy to lock. Simply rotate the locking ball until it fits the lock housing, and the spring will automatically drive the locking pin to lock it, eliminating the need for manual alignment of the sliding lock. To unlock, simply open the rain cover and rotate the key or enter the password and rotate the handle to unlock, effectively improving ease of operation. Attached Figure Description

[0022] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0023] Figure 1A perspective view of an embodiment of this utility model;

[0024] Figure 2 for Figure 1 The main view;

[0025] Figure 3 for Figure 1 Main sectional view.

[0026] Figure 4 for Figure 1 Side view.

[0027] Figure 5 for Figure 3 A three-dimensional schematic diagram of the locking part shown.

[0028] Figure 6 for Figure 5 The left side view of the locking part shown.

[0029] Figure 7 for Figure 5 The right-side view of the locking mechanism shown.

[0030] Figure 8 for Figure 5 An exploded view of the locking section shown.

[0031] Figure 9 for Figure 1 Another exploded schematic diagram of the locking part shown.

[0032] Reference numerals: 1. Lock case; 2. Anti-theft visor; 3. Lock ball; 31. Lock base; 32. Mounting ball; 33. Slot; 4. Rotating shaft; 5. Locking part; 51. Cover plate; 52. Lock hole; 53. Lock cylinder; 54. Rain cover; 55. Locking pin; 56. Limiting hole; 57. Connecting rod; 6. Combination lock; 7. Lock visor. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. The following description of at least one exemplary embodiment is illustrative in nature and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0034] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0035] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as exemplary rather than limiting. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0036] Please see Figure 1-9 One embodiment of this utility model is a trailer hook lock, comprising:

[0037] Lock housing 1, with pivot 4 penetrating the bottom of both sides of the inner wall of lock housing 1, providing rotational support points for locking ball 3. Lock housing 1 is used to accommodate locking part 5 and realize rotational connection with locking ball 3. The lock housing 1 has a reserved installation chamber adapted to locking part 5 to ensure stable operation of locking mechanism. At the same time, its shape design fits the outline of trailer hook to reduce external stress points.

[0038] The locking ball part 3 is embedded inside the lock shell 1 and located below the anti-theft eaves 2. The anti-theft eaves 2 can cover the locking ball part 3, thereby reducing the risk of theft and improving the protection performance. One side of the locking ball part 3 is rotatably connected to the lock shell 1 through a rotating shaft 4. The locking ball part 3 includes a lock seat 31 and a lock head 32. Both sides of the lock seat 31 are provided with shaft holes for connecting with the rotating shaft 4. The lock head 32 is provided on one side of the top of the lock seat 31 and located below the anti-theft eaves 2. The lock head 32 and the lock seat 31 are fixedly connected. After the trailer hook lock locks the vehicle, the lock head 32 can flexibly turn as the vehicle moves during the towing process.

[0039] Locking part 5 is embedded in one side of lock housing 1. Locking part 5 includes cover plate 51 and locking pin 55. Cover plate 51 is fixedly embedded in one side of lock housing 1 and is fastened to lock housing 1 by internal hex screws to prevent loosening caused by violent prying. The inner side of cover plate 51 is provided with an annular silicone sealing ring, which fits tightly with the end face of the chamber of lock housing 1 to effectively block rainwater and dust from entering.

[0040] The locking bezel 7 is located on both sides of the bottom of the lock housing 1. The locking bezel 7 has a symmetrical arc-shaped structure that extends outward along both sides of the bottom of the lock housing 1. The radius of curvature of the arc-shaped outline of the locking bezel 7 is adapted to the curvature of the outer surface of the mounting ball 3. When the plate of the vehicle tow hook is stuck between the bottom of the locking bezel 7 and the top of the lock seat 31, the locking bezel 7 can stably accommodate the vehicle tow hook in the mating space of the two through the fit of the curved surface, thereby wrapping and fixing the tow hook, preventing the tow hook from loosening or being forcibly peeled off, and improving the stability of the connection. The integrated structure of the locking bezel 7 and the bottom of the lock housing 1 can prevent external pry bars from penetrating from the bottom of the lock body to cause damage, and help improve the overall resistance to damage of the lock.

[0041] Please see Figure 1 , Figure 3 and Figure 9 Lock cylinder 53 is unlocked by combination lock 6. Enter the correct password on combination lock 6, rotate the unlocking handle of combination lock 6, drive lock cylinder 53 to move linkage 57 upward, thereby moving locking pin 55 upward and out of the slot 33, thereby unlocking.

[0042] Please see Figure 3-8 The lock cylinder 53 is unlocked by a key. The locking pin 55 is slidably installed inside the lock housing 1. A limiting hole 56 is opened in the center of the locking pin 55. A connecting rod 57 is fixedly installed at one end of the lock cylinder 53 inside the limiting hole 56. After inserting the key into the lock hole 52, rotating the key will drive the lock cylinder 53 to rotate, which will drive the connecting rod 57 to rotate. The connecting rod 57 presses against the upper wall of the limiting hole 56 and pushes the locking pin 55 to move upward. The locking pin 55 moves upward and moves out of the slot 33, thereby unlocking the lock.

[0043] Please see Figure 3-8 The top of the connecting rod 57 is in contact with the top of the inner wall of the limiting hole 56. The other end of the lock cylinder 53 is provided with a lock hole 52. The outer side of the cover plate 51 is reserved with a lock hole 52 or a combination lock 6 installation interface. Positioning protrusions are set around the interface to ensure accurate installation of the components. The lock cylinder 53 runs through one side of the cover plate 51 and inside the lock shell 1.

[0044] Please see Figure 3-8 On the other side of the lock base 31 and below the locking part 5, there is a slot 33, and the locking pin 55 is located directly above the slot 33. The locking pin 55 is made of high carbon steel.

[0045] Please see Figure 3-8 The locking pin 55 is adapted to the slot 33. The locking pin 55 moves down into the slot 33 to lock. A spring is installed on the top of the locking pin 55. One end of the spring is embedded in the positioning hole at the top of the locking pin 55, and the other end abuts against the spring seat at the top of the lock housing 1. The spring is normally in a slightly compressed state and continuously applies a downward elastic force to the locking pin 55 to ensure that the locking pin 55 always has a downward reset tendency. The downward elastic force of the spring will directly drive the locking pin 55 to slide along the inner wall of the lock housing 1 and automatically insert into the slot 33. No manual pressing or additional operation by the user is required. After the locking ball 3 rotates and is embedded in the lock housing 1, the lock will automatically lock, avoiding the risk of not locking due to manual operation.

[0046] Please refer to the figure. A rain cover 54 is installed on the other side of the cover plate 51. The rain cover 54 is made of rubber. One end of the rain cover 54 is provided with a shaft part that engages with the cover plate 51. The rain cover 54 can be rotated through the shaft part. The rain cover 54 precisely covers the lock hole 52 or combination lock 6 on the cover plate 51, preventing rainwater, dust and mud from entering the lock cylinder 53 and avoiding corrosion or jamming of the lock cylinder 53. At the same time, it can be easily opened by the user for unlocking operation.

[0047] Please see Figure 3 The fixed connection structure between the lock head 32 and the lock base 31 is snap-fit, integral molding, or welding.

[0048] Please see Figure 3 The lock head 32 is spherical, cylindrical, or polygonal in shape.

[0049] Please see Figure 1-2 The trailer hook lock also includes an anti-theft visor 2, which is fixedly installed on one side of the top of the lock housing 1. The lock ball 3 is located below the anti-theft visor 2. The shape of the anti-theft visor 2 is adapted to the shape of the lock ball 3, with no obvious protrusions or gaps, reducing the stress points during violent impacts and enhancing the overall resistance to damage of the lock.

[0050] In another embodiment of this utility model, an alarm component is also included, which can be integrated inside the lock housing 1 near the locking part 5. The alarm component includes a vibration sensor, a wireless communication module, a buzzer, a lithium battery, and a control circuit board. The control circuit board is electrically connected to each component, and the lithium battery provides continuous power. An alarm component mounting slot is reserved inside the lock housing 1 near the locking part 5.

[0051] Working principle: After the user connects the mounting ball 32 to the vehicle hook, they rotate the locking ball 3 to make the lock seat 31 fit against the lock housing 1. At this time, the locking pin 55, under the elastic force of the top spring, slides down along the slide inside the lock housing 1 and precisely inserts into the slot 33 of the lock seat 31, completing the automatic locking without additional manual operation. The anti-theft visor 2 on the top of the lock housing 1 will precisely cover the connection gap between the locking ball 3 and the lock housing 1, the exposed end of the rotating shaft 4, and the locking part 5 according to the locking position of the locking ball 3, thus blocking external tools such as pry bars and screwdrivers from directly entering. The anti-theft shim 2 extends into the core connection part of the lock body to prevent criminals from breaking the lock by prying the connection between the lock ball 3 and the lock shell 1; the shape of the anti-theft shim 2 is adapted to the shape of the lock ball 3, without obvious protrusions or gaps, reducing the stress points during violent impacts and enhancing the overall resistance to damage of the lock; when the plate of the vehicle tow hook is stuck between the bottom of the shim 7 and the top of the lock seat 31, the shim 7 can stably accommodate the vehicle tow hook in the matching space of the two through the conformity of the curved surface, realizing the wrapping and fixing of the tow hook and improving the stability of the connection.

[0052] When unlocking with a key is required, hold the free end of the rain cover 54 with your finger and apply upward force to make the rain cover 54 rotate upward around the shaft, fully exposing the lock hole 52; insert the matching key into the lock hole 52 and rotate the key counterclockwise to drive the lock cylinder 53 and the connecting rod 57 to rotate synchronously. The connecting rod 57 pushes the locking pin 55 upward through the force of the inner wall of the limiting hole 56 until the locking pin 55 is completely disengaged from the slot 33, thus completing the unlocking.

[0053] When unlocking is required via combination lock 6, open rain cover 54, enter the correct combination on combination lock 6, rotate the unlocking handle of combination lock 6, drive linkage 57 to move upward, thereby causing locking pin 55 to overcome spring force and move upward, disengaging from slot 33, thus unlocking.

[0054] After unlocking, the user can rotate the locking ball 3 to separate the mounting ball 32 from the vehicle hook, thus completing the unhooking operation of the trailer hook; after the operation is completed, the operation can be reversed to relock.

[0055] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0056] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0057] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0058] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A trailer hook lock, characterized in that, include: Lock case (1), with pivots (4) penetrating the bottom of both sides of the inner wall of the lock case (1); The locking ball part (3) is embedded in the interior of the lock shell (1). One side of the locking ball part (3) is rotatably connected to the lock shell (1) through a rotating shaft (4). The locking ball part (3) is used to be adapted to the vehicle tow hook part and can cooperate with the lock shell (1) to rotate to complete the locking or unlocking action. Locking part (5) is embedded in one side of the lock shell (1) and is used to lock or unlock the locking ball part (3) and the lock shell (1).

2. The trailer hook lock according to claim 1, characterized in that: The locking part (5) includes a cover plate (51) and a locking pin (55). The cover plate (51) is fixedly embedded in one side of the lock shell (1). A lock cylinder (53) passes through one side of the cover plate (51) and inside the lock shell (1). The lock cylinder (53) is unlocked by a combination lock (6).

3. The trailer hook lock according to claim 1, characterized in that: The locking part (5) includes a cover plate (51) and a locking pin (55). The cover plate (51) is fixedly embedded in one side of the lock shell (1). A lock cylinder (53) passes through one side of the cover plate (51) and inside the lock shell (1). The lock cylinder (53) is unlocked by a key. The locking pin (55) is slidably installed inside the lock shell (1). A limiting hole (56) is opened in the center of the locking pin (55). A connecting rod (57) is fixedly installed at one end of the lock cylinder (53) and inside the limiting hole (56).

4. The trailer hook lock according to claim 3, characterized in that: The top of the connecting rod (57) is in contact with the top of the inner wall of the limiting hole (56), and the other end of the lock cylinder (53) is provided with a lock hole (52).

5. The trailer hook lock according to any one of claims 2-4, characterized in that: A spring is mounted on the top of the locking pin (55).

6. The trailer hook lock according to claim 5, characterized in that: A rain cover (54) is installed on the other side of the cover plate (51).

7. The trailer hook lock according to claim 5, characterized in that: The locking ball part (3) includes a locking seat (31) and a locking head (32). Both sides of the locking seat (31) are provided with shaft holes for connecting with the rotating shaft (4). The locking head (32) is provided on one side of the top of the locking seat (31). The locking head (32) and the locking seat (31) are fixedly connected by snap-fit, integral molding or welding.

8. The trailer hook lock according to claim 7, characterized in that: A slot (33) is provided on the other side of the lock base (31) and below the locking part (5). The locking pin (55) is located directly above the slot (33) and is adapted to the slot (33).

9. The trailer hook lock according to claim 7, characterized in that: The lock head (32) is spherical, cylindrical or polygonal in shape.

10. The trailer hook lock according to claim 7, characterized in that, It also includes a security visor (2), which is fixedly installed on one side of the top of the lock housing (1), and the lock ball (3) is located below the security visor (2).

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