Off-road chain lock device

Abstract

The utility model discloses mechanical lock catch technical field relates to off -road antiskid chain locking device. It includes: the lock catch casing of flat, center axis, rotation tooth, cable, hasp, button and linkage assembly. Its side wall is provided with button opening and cable outlet, and button passes button opening and goes out, can move between the unlocking position and locking position. Among them, when the button moves to the locking position, the rotation tooth is driven to the direction of approaching the first plane ratchet by linkage assembly, so that the first plane ratchet and the second plane ratchet are engaged, when the button moves to the unlocking position, the rotation tooth is driven to the direction of away from the first plane ratchet by linkage assembly, so that the first plane ratchet and the second plane ratchet are disengaged.

Description

Technical Field

[0001] This utility model relates to the field of mechanical locking technology, and in particular to a locking device for off-road anti-skid chains. Background Technology

[0002] Snow chains are a common accessory used to increase the friction between tires and the ground. They are widely used in off-road or emergency rescue scenarios, enabling vehicles to better handle treacherous routes, mud, mountain roads, and gravel surfaces.

[0003] Existing snow chains are typically secured to tires using an automatic locking mechanism. For ease of installation and removal, existing automatic locking mechanisms usually have the relevant operating buttons located on the top or bottom surface of a flat housing.

[0004] When a vehicle is driving on complex road surfaces, especially when the tires spin and sink into the ground, the operating buttons on the outer surface of the housing will be worn flat during the long-term contact between the tire and the ground, making it difficult for the automatic locking device to unlock and the snow chains to be easily removed from the tires.

[0005] Therefore, there is an urgent need to provide a suitable anti-slip chain locking structure to effectively avoid the problems and defects of existing automatic locking devices. Utility Model Content

[0006] The off-road anti-skid chain locking device provided in this application can overcome the defects of existing locking devices.

[0007] In a first aspect, this utility model provides an off-road anti-skid chain locking device. The locking device includes: a locking housing; the locking housing is flat and is formed by a first wall, a second wall, and a side wall extending circumferentially around the first and second walls; the side wall has a button opening and a cable outlet; the inner surface of the first wall is provided with a first planar ratchet; a central shaft, formed inside the locking housing and parallel to the thickness direction of the locking housing; a rotating tooth; the rotating tooth is sleeved on the central shaft and can rotate around the central shaft; the surface of the rotating tooth opposite to the inner surface of the first wall is provided with a second planar ratchet; a cable; the cable is wound around the rotating tooth, one end is fixed to the central shaft, and the other end passes through the cable outlet and exits from the locking housing; a latch; the latch and the cable... A rope is fixedly connected to one end of the lock housing; a button; at least a portion of the button protrudes through the button opening and is movable between an unlocked position and a locked position; a linkage assembly; one side of the linkage assembly is connected to the first button, and the other side is connected to the rotating tooth, driving the rotating tooth to move in the direction of the central axis; wherein, when the button moves to the locked position, the linkage assembly drives the rotating tooth to move towards the first planar ratchet, so that the first planar ratchet engages with the second planar ratchet; when the button moves to the locked position, the linkage assembly drives the rotating tooth to move away from the first planar ratchet, so that the first planar ratchet disengages from the second planar ratchet.

[0008] In some embodiments, the locking device further includes: a limiting pin protruding from the button; a self-locking structure formed on the inclined surface of the housing at the button opening; the inclined surface of the housing forms a preset angle with the thickness direction of the latch housing; the self-locking structure includes: a locking guide section, a locking section, and a reset expansion section; the position where the locking guide section and the reset expansion section are connected forms an initial position, and the locking section is disposed between the locking guide section and the reset expansion section to form a locking position; an elastic reset structure disposed between the button and the side wall to drive the button to reset to the locked position; wherein, when the limiting pin is in the initial position, the button is in the locked position; when the button moves along the first direction to the unlocked position, the limiting pin enters the locking position via the locking guide section to keep the button in the unlocked position; when the button in the unlocked position continues to move along the first direction, the limiting pin passes the locking section and resets to the initial position via the reset expansion section.

[0009] In some embodiments, the linkage component includes: a movable component; the movable component is arc-shaped and has a protrusion extending outward from the arc, a pivot, and a connecting portion; the connecting portion is connected to the button; a pair of abutting components; the abutting components are disposed between the end of the arc-shaped movable component and the rotating tooth; a spring member; the spring member is disposed between the rotating tooth and the locking housing, driving a second planar ratchet of the rotating tooth to engage with a first planar ratchet; wherein, when the button moves to the unlock position, the movable component is driven to rotate around the pivot through the connecting portion, so that the pair of abutting components of the movable component press the rotating tooth to move in a direction away from the first planar ratchet.

[0010] In some embodiments, the inner surface of the second wall is provided with a metal spring sheet protruding into the internal space; the surface of the rotating tooth opposite to the inner surface of the second wall is provided with a plurality of limiting protrusions; wherein, the plurality of limiting protrusions are spaced apart around the central axis; when the button is in the unlock position, the limiting protrusions cooperate with the metal spring sheet to restrict the rotating tooth from rotating in the retraction direction.

[0011] In some embodiments, the limiting protrusion includes an inclined surface and an abutting surface; wherein, when the rotating tooth rotates along the extension direction, the inclined surface contacts the metal spring and squeezes the metal spring to retract; when the rotating tooth rotates along the retraction direction, the abutting surface contacts the metal spring and restricts the rotating tooth from rotating along the retraction direction.

[0012] In some embodiments, the locking device further includes a retraction spring; the retraction spring is disposed between the rotating tooth and the central shaft, driving the rotating tooth to rotate along the retraction direction.

[0013] In some embodiments, the locking housing consists of an upper housing and a lower housing; the upper housing and the lower housing are detachably fixedly connected by fasteners.

[0014] At least one advantage of the off-road snow chain locking device provided in this embodiment is that the button is located on the side wall of the flat locking housing, which provides good protection for the button. This side-wall placement effectively prevents the button from being worn down and unable to unlock due to the tire spinning freely relative to the ground during snow chain use. Attached Figure Description

[0015] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0016] Figure 1 This is a schematic diagram of the structure of the off-road anti-skid chain locking device according to an embodiment of the present utility model;

[0017] Figure 2 This is an exploded view of the off-road anti-skid chain locking device according to an embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram of the locking housing according to an embodiment of the present utility model;

[0019] Figure 4 This is a schematic diagram of the inner surface of the upper shell according to an embodiment of the present invention;

[0020] Figure 5 This is a schematic diagram of the button in an embodiment of the present utility model;

[0021] Figure 6 This is an enlarged schematic diagram of the self-locking structure according to an embodiment of the present utility model;

[0022] Figure 7 This is a schematic diagram of the inner surface of the lower housing according to an embodiment of the present invention;

[0023] Figure 8 This is a schematic diagram of the rotating gear according to an embodiment of the present utility model;

[0024] Figure 9 This is a schematic diagram of the off-road anti-skid chain locking device according to an embodiment of the present invention, showing the case where the upper housing is removed. Detailed Implementation

[0025] The present invention will now be described in detail with reference to specific embodiments. It should be emphasized that the following description is merely exemplary and is not intended to limit the scope and application of the present invention.

[0026] It should be noted that, unless otherwise expressly specified and limited, the terms "center," "longitudinal," "lateral," "upper," "lower," "vertical," "horizontal," "inner," and "outer," etc., used in this specification to indicate the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and 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 this utility model. The terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features; thus, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature; "multiple" means two or more; and "and / or" includes any and all combinations of one or more related listed items. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] Figure 1 A schematic diagram of the off-road anti-skid chain locking device provided in an embodiment of this utility model. Figure 2 This is an exploded view of the off-road anti-skid chain locking device provided in an embodiment of the present invention. Figure 1 and Figure 2 As shown, the locking device includes: a locking housing 10, a central shaft 20, a rotating tooth 30, a cable 40, a buckle 50, a button 60, and a linkage assembly 70.

[0028] The locking housing 10 is generally flat and is formed by a first wall 10a, a second wall 10b, and a side wall 10c extending circumferentially around the space between the first wall 10a and the second wall 10b. For example... Figure 3 As shown, its side wall 10c has a button opening H1 and a cable outlet H2.

[0029] In this embodiment, "flat" means that the overall structure of the locking housing 10 is relatively thin in the thickness direction x, and has a large area in the extension direction perpendicular to the thickness direction.

[0030] The first wall 10a and the second wall 10b represent two opposing surfaces of the flat shell structure in the thickness direction. When used as an automatic locking device for snow chains, it will have physical contact with the ground and / or tires. Figure 4 As shown, the inner surface of the first wall 10a is also provided with a first planar ratchet 11.

[0031] Specifically, the locking housing 10 can be composed of an upper housing 13 and a lower housing 14. The upper housing 13 and the lower housing 14 are detachably fixedly connected by fasteners 15 to form the locking housing 10.

[0032] The central shaft 20 is formed inside the latch housing and is an axis parallel to the thickness direction of the latch housing. For example... Figure 9 As shown, the rotating tooth 30 is sleeved on the central shaft 20 and can rotate around the central shaft. Furthermore, the surface of the rotating tooth 30 opposite to the inner surface of the first wall is also provided with a second planar ratchet 31.

[0033] The cable 40 is wound around the rotating gear 30, with one end fixed to the central shaft 20 and the other end passing through the cable outlet H2 and exiting the locking housing. Driven by the rotating gear 30, the cable 40 can extend from or retract into the locking housing.

[0034] In this embodiment, the rotational direction in which the rotating tooth 30 drives the cable 40 to retract is called the "retraction direction," and the direction in which the rotating tooth 30 rotates when the cable 40 is pulled and extends a longer length from the locking housing is called the "extension direction." The retraction direction and the extension direction are two opposite rotational directions.

[0035] The buckle 50 is fixedly connected to one end of the cable 40 that extends from the buckle housing. This serves as one end connected to the snow chain. The snow chain is also connected to the buckle housing, thereby locking the snow chain to the wheel by varying the length of the cable 40.

[0036] Button 60 is a control component for operating the anti-slip chain locking device. At least a portion of it extends through button opening H1 and can move between the unlocked position P1 and the locked position P2. The user can toggle button 60 between the unlocked position P1 and the locked position P2.

[0037] Specifically, button 60 can have any suitable preset motion trajectory, not limited to a vertical pressing operation. For example, as Figure 1 The arrow indicates the arc-shaped toggle operation. The specific trajectory can be determined by the guide structure formed by the structure of button 60 and the shape of button opening H1, and is not specifically limited here.

[0038] The linkage assembly 70 is a series of components used to establish the kinematic connection between the button 60 and the rotating gear 30. One side is connected to the button 60, and the other side is connected to the rotating gear 30. It can drive the rotating gear 30 to move in the direction of the central axis as the position of the button 60 changes.

[0039] Specifically, the linkage component 70 includes: a movable part 71, a pair of abutting parts 72, and a spring 73.

[0040] The movable part 71 is arc-shaped and has a protrusion 711 extending outward from the arc, a pivot 712, and a joint 713.

[0041] The rotating shaft 712 engages with the base inside the housing, allowing the movable part 71 to rotate around the rotating shaft 712. The connecting part 713 connects with the button 60, and the abutting part 712 is disposed between the end of the arc-shaped movable part and the rotating tooth 30.

[0042] A spring 73 is disposed between the rotating tooth 30 and the locking housing 10. It provides an elastic force to drive the second planar ratchet of the rotating tooth 30 to engage with the first planar ratchet. In other words, under the action of the spring 73, the rotating tooth 30 has a tendency to move automatically toward the first planar ratchet.

[0043] Therefore, when button 60 moves to the unlock position P2, the engaging part 713 drives the movable part 71 to rotate around the pivot 712, causing a pair of abutting parts 72 to press the rotating teeth 30 to move away from the first plane ratchet. Correspondingly, the spring 73 undergoes elastic deformation. When button 60 returns to the locked position P1, the spring 73 drives the rotating teeth 30 to move towards the first plane ratchet, causing the second plane ratchet to engage with the first plane ratchet.

[0044] In some embodiments, please continue reading Figure 2 The locking device further includes a retraction spring 90. The retraction spring 90 is disposed between the rotating tooth 30 and the central shaft 20, and provides an elastic force to drive the rotating tooth 30 to rotate in the retraction direction. In other words, the rotating tooth 30 has a tendency to rotate in the retraction direction, thereby enabling the automatic locking device of the anti-skid chain to lock automatically.

[0045] In actual use, when button 60 moves to the locked position P2, the linkage component 70 drives the rotating tooth 30 to move towards the first plane ratchet 11, so that the first plane ratchet 11 engages with the second plane ratchet 31. At this time, the rotating tooth 30 cannot rotate in the extension direction, and the automatic locking device tightens the anti-slip chain.

[0046] When button 60 moves to the unlock position P1, the linkage component 70 drives the rotating tooth 30 to move away from the first plane ratchet 11, so that the first plane ratchet 11 disengages from the second plane ratchet 31. At this time, the rotating tooth 30 can rotate in the extension direction, and the cable can be pulled out to a greater length, so that the anti-skid chain is no longer tightened.

[0047] In some embodiments, for ease of use, the button 60 also has a self-locking function, automatically remaining in the unlocked position P1 until the user performs a further locking operation. Figure 5 and Figure 6 As shown, the locking device also includes: a limiting pin 81, a self-locking structure 82, and an elastic reset structure 83.

[0048] The limiting pin 81 is fixed in the button 60, with at least a portion protruding from the button 60. It cooperates with the self-locking structure 82 to realize the self-locking function of the button.

[0049] A self-locking structure 82 is provided on the inclined surface S1 of the housing at the button opening, forming an irregular movement path. For example... Figure 6 As shown, the irregular movement path of the self-locking structure 82 can be divided into: a locking guide segment 821, a locking segment 822, and a reset expansion segment 823.

[0050] The initial position P11 is formed by the connection between the locking guide section 821 and the reset expansion section 823. The locking section 822 is located between the locking guide section 821 and the reset expansion section 823, forming the locking position P12. The locking guide section 821, the locking section 822, and the reset expansion section 823 have different depths of indentation relative to the inclined surface S1 of the housing, and a step is formed between any two of them. The locking section 822 has the largest depth of indentation.

[0051] A resilient reset structure 83 is disposed between button 60 and side wall 10c. It provides a resilient force to drive button 60 to automatically reset to the locked position P1.

[0052] Specifically, the inclined surface S1 of the housing forms a preset angle with the thickness direction of the locking housing. When the button 60 is in the locked position P2 close to the inclined surface S1 of the housing, the limiting pin 81 is in the initial position P11.

[0053] As the user moves button 60 away from the inclined surface S1 of the housing, the limiting pin 81 gradually extends and moves to the locking section 822 under the guidance of the locking guide section 821.

[0054] When button 60 moves to the unlock position P1, the limiting pin 81 enters the locking position P12 formed by the locking segment 822. Since the limiting pin 81 cannot pass through the locking segment 822, the elastic reset structure 83 cannot drive button 60 to reset, and it remains in the unlock position P1.

[0055] As the user further moves the button 60 located in the unlock position P1 away from the inclined surface S1 of the housing, the limiting pin 81 can pass through the locking section 822 and enter the reset expansion section 823, and gradually move to the initial position P11 under the guidance of the reset expansion section 823.

[0056] In some embodiments, to avoid inconvenience caused by the automatic retraction of the cable 40, the automatic locking device, when in the unlocked state, restricts the automatic retraction of the cable 40 by additionally setting a rotation restriction structure.

[0057] like Figure 7 As shown, a metal spring clip 12 protruding into the internal space is provided on the inner surface of the second wall. Figure 8 As shown, the surface of the rotating tooth 30 opposite to the inner surface of the second wall is provided with a plurality of limiting protrusions 32. The plurality of limiting protrusions 32 are arranged at intervals around the central axis, and the interval between two adjacent limiting protrusions 32 is the same arc.

[0058] Therefore, when button 60 is in the unlocked position, the rotating tooth 30 is positioned close to the inner surface of the second wall. At this time, the limiting protrusion 32 cooperates with the metal spring 22 to restrict the rotation of the rotating tooth 30 in the retraction direction. When button 60 is in the locked position, the rotating tooth 30 is positioned away from the inner surface of the second wall. At this time, the metal spring 22 no longer contacts the limiting protrusion 32, and the rotation restriction function is not triggered.

[0059] For details, please continue reading. Figure 8 The limiting protrusion 32 includes an inclined surface 321 and an abutment surface 322, forming a wedge-shaped structure. Thus, when the rotating tooth 30 rotates in the extending direction, the inclined surface 322 contacts the metal spring 12, compressing it and preventing it from restricting rotation. When the rotating tooth 30 rotates in the retracting direction, the abutment surface 322 of the limiting protrusion 32 contacts the metal spring 12. The two abut against each other, thereby restricting the rotation of the rotating tooth in the retracting direction.

[0060] The above description, in conjunction with specific / preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. Those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and all of these fall within the protection scope of the present invention.

Claims

1. A locking device for off-road anti-skid chains, characterized in that, include: Lock housing; The locking housing is flat and is formed by a first wall, a second wall, and a side wall extending circumferentially around the first wall and the second wall. The side wall is provided with a button opening and a cable outlet; the inner surface of the first wall is provided with a first planar ratchet. A central shaft is formed inside the latch housing and is parallel to the thickness direction of the latch housing; Rotating teeth; the rotating teeth are sleeved on the central shaft and can rotate around the central shaft; the surface of the rotating teeth opposite to the inner surface of the first wall is provided with second planar ratchet teeth; Cable; the cable is wound around the rotating tooth, one end is fixed to the central shaft, and the other end passes through the cable outlet and exits from the locking housing; Fastener; the fastener is fixedly connected to one end of the cable that extends out of the buckle housing; A button; at least a portion of the button protrudes through the button opening and is movable between an unlocked position and a locked position; Linkage component; one side of the linkage component is connected to the button, and the other side is connected to the rotating tooth, driving the rotating tooth to move in the direction of the central axis; When the button is moved to the locked position, the linkage component drives the rotating tooth to move towards the first planar ratchet, so that the first planar ratchet engages with the second planar ratchet. When the button is moved to the unlock position, the linkage component drives the rotating tooth to move away from the first planar ratchet, so that the first planar ratchet disengages from the second planar ratchet.

2. The off-road anti-skid chain locking device according to claim 1, characterized in that, Also includes: A limiting pin, which protrudes from the button; A self-locking structure is formed on the inclined surface of the housing of the button opening; The inclined surface of the housing forms a predetermined angle with the thickness direction of the locking housing; The self-locking structure includes: a locking guide section, a locking section, and a reset expansion section; the position where the locking guide section and the reset expansion section are connected forms an initial position, and the locking section is disposed between the locking guide section and the reset expansion section to form a locking position; An elastic reset structure is disposed between the button and the side wall, driving the button to reset to the locked position; When the limiting pin is in the initial position, the button is in the locked position; When the button moves to the unlock position along the first direction, the limiting pin enters the locking position via the locking guide section to keep the button in the unlock position; As the button in the unlocked position continues to move along the first direction, the limiting pin passes the locking section and is reset to the initial position via the reset expansion section.

3. The off-road anti-skid chain locking device according to claim 1, characterized in that, The linkage component includes: A movable component; the movable component is arc-shaped and has a protrusion extending outward from the arc, a pivot, and a connecting portion; the connecting portion is connected to the button; A pair of abutting parts; the abutting parts are disposed between the end of the arc-shaped movable part and the rotating tooth; A spring element; the spring element is disposed between the rotating tooth and the locking housing, and the second planar ratchet that drives the rotating tooth engages with the first planar ratchet. When the button is moved to the unlock position, the movable component is rotated around the pivot by the engagement portion, so that a pair of abutting parts of the movable component press the rotating teeth to move in a direction away from the first plane ratchet.

4. The off-road anti-skid chain locking device according to claim 1, characterized in that, The inner surface of the second wall is provided with a metal spring sheet protruding into the internal space; the surface of the rotating tooth opposite to the inner surface of the second wall is provided with a number of limiting protrusions; Among them, a plurality of the limiting protrusions are arranged at intervals around the central axis; When the button is in the unlocked position, the limiting protrusion cooperates with the metal spring to restrict the rotation of the rotating tooth in the retraction direction.

5. The off-road anti-skid chain locking device according to claim 4, characterized in that, The limiting protrusion includes: an inclined surface and an abutting surface; When the rotating tooth rotates along the extension direction, the inclined surface comes into contact with the metal spring and squeezes the metal spring to retract; When the rotating tooth rotates in the recycling direction, the contact surface comes into contact with the metal spring, restricting the rotating tooth from rotating in the recycling direction.

6. The off-road anti-skid chain locking device according to claim 4, characterized in that, Also includes: A recovery spring; the recovery spring is disposed between the rotating tooth and the central shaft, driving the rotating tooth to rotate along the recovery direction.

7. The off-road anti-skid chain locking device according to claim 1, characterized in that, The locking housing consists of an upper housing and a lower housing; the upper housing and the lower housing are detachably fixed together by fasteners.

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