Anti-skid chain lock and automobile anti-skid chain thereof

Abstract

The embodiment of the application relates to the technical field of mechanical buckles, and discloses an anti-skid chain locker and an automobile anti-skid chain. The anti-skid chain locker comprises a flat-shaped buckle shell, a central shaft, a rotating tooth, a cable, a buckle, an operating assembly and a linkage assembly. An operating assembly opening and a cable outlet are arranged on the side wall of the buckle shell, and the operating assembly passes through the operating assembly opening. When the operating assembly is in an extended state, the rotating tooth is driven by the linkage assembly to move away from the first plane ratchet in a direction, so that the first plane ratchet is separated from the second plane ratchet. When the operating assembly is in a recycling state, the rotating tooth is driven by the linkage assembly to move close to the first plane ratchet in a direction, so that the first plane ratchet is engaged with the second plane ratchet.

Description

Technical Field

[0001] This application relates to the field of mechanical locking technology, and in particular to a snow chain locking device and its automotive snow chain. Background Technology

[0002] Snow chains are a common piece of equipment 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 cope with treacherous routes, mud, mountain roads, and gravel surfaces, preventing vehicles from slipping or getting stuck, and improving driving safety.

[0003] Snow chains are typically secured to the tire surface using snow chain lockers. However, the excessive thickness of existing snow chain lockers leads to several drawbacks. For example, the excessive thickness causes the locker to protrude too high on the tire surface, resulting in it being thrown to one side by centrifugal force when the wheel rotates, thus affecting the overall stability and even distribution of force on the snow chain.

[0004] For example, thicker locking devices will protrude above the tire surface after installation, making them more susceptible to contact with the ground, snow, rocks, or other foreign objects during driving. This can lead to rapid wear and breakage of the locking devices, affecting their lifespan. Some operating buttons and levers are located on the front, making them prone to wear and damage when the vehicle gets stuck.

[0005] Therefore, there is an urgent need to provide a thin anti-slip chain lock with an operating surface and side or back, thereby ensuring service life and safety. Utility Model Content

[0006] The anti-skid chain locker and its automotive anti-skid chain provided in this application can overcome the defect of existing anti-skid chain lockers having a large thickness.

[0007] In a first aspect, this application provides an anti-skid chain locker. The anti-skid chain locker includes: a lock housing; the lock 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 an operating component outlet and a cable outlet; the inner surface of the first wall is provided with a first planar ratchet; the inner surface of the second wall has a plurality of inclined recesses, each inclined recess including: an inclined surface and an abutment surface; a central shaft formed inside the lock housing and parallel to the thickness direction of the lock housing, the plurality of inclined... A slanted recess is arranged around the central axis; a rotating tooth, sleeved on the central axis, is rotatable around the central axis; the surface of the rotating tooth opposite the inner surface of the first wall is provided with a second planar ratchet, and the surface of the rotating tooth opposite the inner surface of the second wall is provided with an elastic protrusion; a cable, wound around the rotating tooth, one end fixed to the central axis, and the other end passing through the cable outlet and exiting from the locking housing; a latch, fixedly connected to the end of the cable exiting the locking housing; and an operating component. The operating component extends through its outlet and can switch between an extended state and a retracted state. A linkage component, one side of which is connected to the operating component and the other side to the rotating tooth, drives the rotating tooth to move in the direction of the central axis. When the operating component is in the retracted state, 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, and the elastic protrusion leaves the inner surface of the second wall. When the operating component is in the extended state, 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, and the elastic protrusion adheres tightly to the inner surface of the second wall. When the rotating tooth rotates in the extended direction, the inclined surface contacts the elastic protrusion, squeezing the elastic protrusion to retract it. When the rotating tooth rotates in the retracted direction, the abutting surface abuts against the elastic protrusion, restricting the rotating tooth from rotating in the retracted direction.

[0008] Optionally, the operating component includes: a button extending through the sidewall and movable between a first position and a second position; a button reset member connected to the button for driving the button to reset from the second position to the first position; a locking lever extending through the sidewall and movable between a locked position and an unlocked position; and a locking lever reset member connected to the locking lever for driving the locking lever to reset from the unlocked position to the locked position.

[0009] Optionally, a beveled push-lock structure is formed between the locking lever and the button; wherein the locking lever is provided with a limit block, and the button is provided with a contact bevel corresponding to the limit block; during the process of the button moving from the first position to the second position, the contact bevel guides the limit block to move, so that the locking lever moves towards the unlock position; when the button moves to the second position, the limit block passes the contact bevel, and the locking lever automatically resets to the locked position under the action of the locking lever reset member, so that the limit block engages with the button, keeping the button in the second position.

[0010] Optionally, the operating component includes: a toggle switch extending through the side wall and rotatably connected to the latch housing, rotatable between a third position and a fourth position; a first locking structure disposed between the toggle switch and the latch housing; and a second locking structure disposed at the rotatable connection of the toggle switch; wherein, when the toggle switch is in the third position, the first locking structure restricts the toggle switch from leaving the third position; and when the toggle switch is rotated to the fourth position, the second locking structure restricts the toggle switch from remaining in the fourth position.

[0011] Optionally, the linkage component includes: a movable component; the movable component is arc-shaped and has a protrusion extending outward from the arc, a rotating shaft, and a connecting portion; the connecting portion is connected to the operating component; 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; the spring is disposed between the rotating tooth and the locking housing, driving the second planar ratchet of the rotating tooth to engage with the first planar ratchet; wherein, when the operating component is in the extended state, the movable component is driven to rotate around the rotating shaft through the connecting portion, so that the pair of abutting components of the movable component squeeze the rotating tooth to move in a direction away from the first planar ratchet.

[0012] Optionally, the elastic protrusion is a metal spring sheet disposed on the rotating tooth; the rotating tooth has a recess for accommodating the metal spring sheet; wherein, one end of the metal spring sheet is a fixed end, fixed in the recess of the rotating tooth, and the other end of the metal spring sheet is a free end, restricted in the recess of the rotating tooth.

[0013] Optionally, the anti-skid chain locker 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.

[0014] Optionally, the first planar ratchet and the second planar ratchet have an inclined tooth surface structure; wherein, when the rotating tooth rotates in the retraction direction, the first planar ratchet and the second planar ratchet are in sliding engagement, allowing the rotating tooth to rotate in the retraction direction; when the rotating tooth rotates in the extension direction, the first planar ratchet and the second planar ratchet are in locking engagement, restricting the rotation of the rotating tooth in the extension direction.

[0015] Optionally, 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.

[0016] Secondly, embodiments of this application also provide a car snow chain. The car snow chain includes: a snow chain and a snow chain locker as described above.

[0017] At least one beneficial effect of the anti-skid chain locker provided in this application embodiment is that by setting the operating components on the flat sidewall of the lock housing, the thickness of the lock housing is effectively reduced. Furthermore, by providing elastic protrusions and inclined recesses, the thickness of the lock housing is further reduced. Attached Figure Description

[0018] 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.

[0019] Figure 1 This is an exploded view of the anti-skid chain locker of Embodiment 1 of this application;

[0020] Figure 2 This is an exploded view of the anti-skid chain locker of Embodiment 2 of this application;

[0021] Figure 3 This is a schematic diagram of the button and locking lever working together according to an embodiment of this application;

[0022] Figure 4 This is a schematic diagram of the lower housing and the rotating gear meshing according to an embodiment of this application;

[0023] Figure 5 This is a schematic diagram of the engagement between the lower housing and the rotating teeth when switching between the retracted state and the extended state according to an embodiment of this application.

[0024] Figure 6 This is a schematic diagram of the toggle switch and the latch housing in Embodiment 2 of this application;

[0025] Figure 7 This is a schematic diagram of the first locking structure of the toggle switch in Embodiment 2 of this application;

[0026] Figure 8 This is a schematic diagram of the first planar ratchet according to an embodiment of this application;

[0027] Figure 9 This is a schematic diagram of the second planar ratchet in an embodiment of this application;

[0028] Figure 10 This is a schematic diagram of the assembly of the rotating teeth and the elastic protrusion according to an embodiment of this application;

[0029] Figure 11 This is a schematic diagram showing the position switching of the toggle switch of the anti-skid chain locker in Embodiment 2 of this application;

[0030] Figure 12 This is a schematic diagram of the connection structure between the rotating teeth and the cable in an embodiment of this application;

[0031] Figure 13 This is a schematic diagram of the toggle switch according to Embodiment 2 of this application;

[0032] Figure 14 This is a schematic diagram of the locking housing structure of Embodiment 2 of this application;

[0033] Figure 15 This is a schematic diagram of the anti-slip locking device according to Embodiment 2 of this application, showing the case where part of the upper housing is removed;

[0034] Figure 16 This is an installation diagram of the anti-slip lock and anti-slip chain according to an embodiment of this application. Detailed Implementation

[0035] The present application 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 application.

[0036] 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 orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application 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 application. The terms "installed," "connected," "linked," and "fixed," 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 application according to the specific circumstances.

[0037] Figure 1 This is an exploded view of the anti-skid chain locking device provided in Embodiment 1 of this application. Figure 1 As shown, the anti-skid chain locker includes: a lock housing 10, a central shaft 20, a rotating tooth 30, a cable 40, a buckle 50, a button 60, a button reset component 61, a linkage assembly 70, a locking lever 80, and a recovery spring 90.

[0038] The locking housing 10 is generally flat and is formed by a first wall, a second wall, and a side wall extending circumferentially around the first and second walls. Its side wall has a button opening H1, a cable outlet H2, and a lever opening H3.

[0039] 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.

[0040] The first wall and the second wall represent two opposing surfaces of the flat locking housing 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. The inner surface of the first wall is also provided with a first planar ratchet.

[0041] Specifically, the locking housing 10 can be composed of an upper housing 14 and a lower housing 13. The upper housing 14 and the lower housing 13 are detachably fixedly connected by fasteners 15 to form the locking housing 10.

[0042] 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 1 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.

[0043] 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.

[0044] 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.

[0045] Specifically, both the first and second planar ratchet teeth have inclined tooth surface structures. When the rotating tooth rotates in the retraction direction, the first and second planar ratchet teeth are in sliding engagement, allowing the rotating tooth to rotate in the retraction direction. When the rotating tooth rotates in the extension direction, the first and second planar ratchet teeth are in locking engagement, restricting the rotation of the rotating tooth in the extension direction.

[0046] 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.

[0047] Button 60 is a control component for operating the anti-slip chain locker. At least a portion of it protrudes through button opening H1 and is movable between a first position and a second position. The user can switch between the first and second positions by pushing button 60.

[0048] Specifically, button 60 can have any suitable preset motion trajectory, not limited to a vertical pressing operation. For example, an arc-shaped toggle operation. The specific motion 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.

[0049] The button reset component 61 is connected to the button 60 and is used to drive the button to reset from the second position to the first position. In other words, the button 60 will automatically return to the first position without the influence of external force, and has a tendency to automatically reset to the first position.

[0050] Specifically, the button reset element 61 can be a pair of compression springs. Its two ends abut against the latch housing and the button 60 respectively, so that the button 60 can automatically reset to the first position P1.

[0051] 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.

[0052] Specifically, the linkage component 70 includes: a movable part 71, a pair of abutting parts 72, and a spring 73.

[0053] The movable part 71 is arc-shaped and has a protrusion extending outward from the arc, a pivot, and a joint 713.

[0054] The rotating shaft engages with the base inside the housing, allowing the movable part 71 to rotate around the rotating shaft. The connecting part 713 connects with the button 60, and the abutting part 72 is disposed between the end of the arc-shaped movable part and the rotating tooth 30.

[0055] 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.

[0056] Therefore, when button 60 moves to the second position, the engaging part 713 drives the movable part 71 to rotate around the pivot, 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 first position, 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.

[0057] The locking lever 80 is another operating component. It extends through the lever opening H3 and can move between the locked and unlocked positions. The locking lever 80 and the button 60 are connected within the latch housing to form a beveled push-lock structure.

[0058] A retraction spring 90 is disposed between the rotating tooth 30 and the central shaft 20 to provide 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 anti-slip chain locker to lock automatically.

[0059] In actual use, when the user moves button 60 to the second position, the locking lever 80 moves to the locked position. The locking lever 80, in the locked position, abuts against button 60, thereby holding button 60 in the second position.

[0060] When button 60 moves to the second position, the linkage component 70 drives the rotating tooth 30 to move away from the first plane ratchet, causing the first plane ratchet to disengage from the second plane ratchet 31. At this time, the rotating tooth 30 can rotate in the extension direction, allowing the cable to be pulled out to a greater length.

[0061] When the locking lever 80 is moved to the unlock position by the user, the locking lever 80 no longer restricts the movement of the button 60. Under the action of the button reset member 61, the button 60 automatically resets to the first position. Correspondingly, the linkage component 70 drives the rotating tooth 30 to move towards the first plane ratchet, so that the first plane ratchet engages with the second plane ratchet 31.

[0062] At this point, the rotating tooth 30 cannot rotate in the extension direction but can only rotate in the retraction direction. Under the action of the retraction spring 90, the rotating tooth 30 is driven to rotate, thereby tightening the anti-skid chain.

[0063] In some embodiments, the button 60 and the locking lever 80 are self-locking via a beveled push-lock structure, enabling the button 60 to remain in the second position.

[0064] The locking lever 80 is provided with a matching locking lever reset member 81. This locking lever reset member 81 is used to drive the locking lever 80 from the unlocked position to the locked position. In other words, the locking lever 80 also has the characteristic of automatic reset. Exemplarily, the locking lever reset member 81 can be a compression spring. The two ends of the compression spring abut against the latch housing and the locking lever 80, respectively.

[0065] like Figure 3 As shown, the locking lever 80 is provided with an outwardly protruding limiting block 82. The button 60 is provided with a contact slope 62 corresponding to the limiting block 82.

[0066] As button 60 moves from the first position to the second position, the contact ramp 62 guides the limit block 82 to move, thereby pushing the locking lever 80 to move towards the unlock position.

[0067] As button 60 approaches and reaches the second position, the limiting block 82 will pass the apex of the contact ramp 62. At this point, the contact ramp 62 no longer exerts force on the limiting block 82. The locking lever 80 will automatically reset to the locked position under the action of the locking lever reset member 81.

[0068] At this time, the button 60 in the second position will be engaged with the limiting block 82 of the locking lever 80 in the locked position, thereby maintaining it in the second position.

[0069] Furthermore, when the user pushes the locking lever 80 back to the unlock position, the button 60 is no longer blocked by the limiting block 82 of the locking lever 80 and can automatically reset to the first position under the action of the button reset member 61.

[0070] Figure 2 This is an exploded view of the anti-skid chain locking device provided in Embodiment 2 of this application. Figure 2 As shown, the anti-skid chain locking device includes: a locking housing 10, a central shaft 20, a rotating tooth 30, a cable 40, a buckle 50, a toggle switch 60a, a linkage assembly 70, and a recovery spring 90.

[0071] The locking housing 10 is generally flat and is formed by a first wall, a second wall, and a side wall extending circumferentially around the first and second walls. Its side wall has an operating component outlet H1 and a cable outlet H2.

[0072] 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.

[0073] The first wall and the second wall represent two opposing surfaces of the flat locking housing 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. The inner surface of the first wall is also provided with a first planar ratchet.

[0074] Specifically, the locking housing 10 can be composed of an upper housing 14 and a lower housing 13. The upper housing 14 and the lower housing 13 are detachably fixedly connected by fasteners 15 to form the locking housing 10.

[0075] 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 2 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.

[0076] 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.

[0077] 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.

[0078] Specifically, both the first and second planar ratchet teeth have inclined tooth surface structures. When the rotating tooth rotates in the retraction direction, the first and second planar ratchet teeth are in sliding engagement, allowing the rotating tooth to rotate in the retraction direction. When the rotating tooth rotates in the extension direction, the first and second planar ratchet teeth are in locking engagement, restricting the rotation of the rotating tooth in the extension direction.

[0079] In some embodiments, such as Figure 8 and Figure 9 As shown, the first planar ratchet 31 and the second planar ratchet 141 can be stepped. The portion of the first planar ratchet 31 near the central axis with a predetermined length (e.g., 2 mm) is designated as the central portion a10. The inclined surface a11 of the central portion a10 is higher than the inclined surfaces of other portions, while the engaging surface a12 is lower than the engaging surfaces of other portions.

[0080] The portion of the second plane ratchet 141 near the central axis at a predetermined length (e.g., 2 mm) is designated as the central portion b10. The inclined surface b11 of the central portion b10 is higher than the inclined surfaces of the other portions, while the engaging straight surface b12 is lower than the engaging straight surfaces of the other portions.

[0081] Therefore, when the first plane ratchet 31 and the second plane ratchet 141 mesh with each other, the central parts a10 and b10 near the central axis will make physical contact first. At this time, the anti-slip chain locker is in the retraction position, and the first plane ratchet 31 and the second plane ratchet 141 are generally in an unloaded state, which effectively reduces the friction generated by the rotation of the teeth when the cable is retracted, so that the cable can be retracted smoothly.

[0082] As the first planar ratchet 31 and the second planar ratchet 141 approach each other further, the outer peripheral portions located around the central portion a10 engage with each other. At this time, the anti-skid chain locker is in the locked position, and the first planar ratchet 31 and the second planar ratchet 141 provide sufficient friction to lock the anti-skid chain and prevent the rotating teeth 30 from rotating in the extension direction.

[0083] 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.

[0084] The toggle switch 60a is another control component for operating the anti-slip chain lock. At least a portion of it extends through the operating component outlet H1 and is rotatably connected to the locking housing 10. The user can toggle the toggle switch 60a between a third position and a fourth position.

[0085] Specifically, such as Figure 6As shown, the toggle switch 60a is provided with an arc-shaped support leg 64a. The lower housing 13 is provided with a support leg groove 64b that is adapted to the support leg 64a. The bracket 64a is received in the support leg groove 64b, thereby realizing the rotational connection between the toggle switch 60a and the locking housing 10.

[0086] Ideally, please continue reading. Figure 6 The support foot groove 64b is also provided with a limiting point 65b. When the toggle switch 60a is rotated from the third position to the fourth position, the limiting point 65b abuts against the support foot 64a to limit the continued rotation of the toggle switch 60a.

[0087] This achieves a rotation limit for the toggle switch 60a, allowing it to rotate to a maximum angle of 90° (i.e., the fourth position).

[0088] The linkage assembly 70 is a series of components used to establish the kinematic connection between the toggle switch 60a and the rotating tooth 30. One side is connected to the toggle switch 60a, and the other side is connected to the rotating tooth 30. It can drive the rotating tooth 30 to move in the direction of the central axis as the position of the toggle switch 60a changes.

[0089] Specifically, the linkage component 70 includes: a movable part 71, a pair of abutting parts 72, and a spring 73.

[0090] The movable part 71 is arc-shaped and has a protrusion 711 extending outward from the arc, a pivot 712, and a joint 713. The pivot 711 cooperates with the base inside the housing, allowing the movable part 71 to rotate around the pivot.

[0091] The toggle switch 60a is provided with a guide groove 63a, and the engaging part 713 is adapted to and housed within the guide groove 63a. As the toggle switch 60a rotates, the engaging part 713, guided by the guide groove, converts the rotation of the toggle switch 60a into the rotational motion of the movable part 71 around the pivot.

[0092] The abutment member 72 is disposed between the end of the arc-shaped movable member 71 and the rotating tooth 30. The abutment member 72 is used to form a transmission connection between the end of the movable member 71 and the rotating tooth 30.

[0093] 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.

[0094] Therefore, when the toggle switch 60a is rotated to the fourth position, the movable part 71 is driven to rotate around the pivot via the engagement part 713, causing a pair of abutting parts 72 to press the rotating teeth 30 to move away from the ratchet teeth on the first plane. Correspondingly, the spring member 73 undergoes elastic deformation.

[0095] When the toggle switch 60a is reset to the third position, the spring 73 drives the rotating tooth 30 to move toward the first plane ratchet, so that the second plane ratchet engages with the first plane ratchet.

[0096] In the actual use of anti-skid chain lockers, such as Figure 13 As shown, the toggle switch 60a is also provided with a rotary reset ramp 64a, which forms a reset fulcrum A.

[0097] As the toggle switch 60a rotates from the fourth position to the third position, the rotating reset ramp 64a contacts the engagement portion 713, pushing the movable part 71 back to its initial position. When the toggle switch 60a is reset to the third position, the engagement portion 713 is supported by the reset fulcrum A, so that the movable part 71 is stably held in its initial position.

[0098] In some embodiments, to ensure the toggle switch 60a remains stable during operation, such as... Figure 6 and Figure 7 As shown, the toggle switch 60a also includes: a first locking structure 61a and a second locking structure 62a.

[0099] The first locking structure 61a is a hook provided on the toggle switch 60a. When the toggle switch 60a is in the third position, it engages with the hook 61b provided on the latch housing, thereby preventing the toggle switch 60a from leaving the third position.

[0100] The second locking structure 62a is a locking recess located at the rotatable connection between the toggle switch 60a and the latch housing. When the toggle switch 60a is in the fourth position, the pre-set locking protrusion 62b on the latch housing is locked and restricted within the locking recess, thereby keeping the toggle switch 60a in the fourth position.

[0101] The above-described embodiments 1 and 2 provide two different operating components for controlling and switching the working state of the anti-slip chain locker. Based on the principles of the operating components provided in embodiments 1 and 2, those skilled in the art can further modify and adjust the operating components, using other different types of operating components.

[0102] In this application, for the sake of simplicity, the two positions of the operating component are referred to as the "extended state" and the "retracted state". For example, when the button 60 is in the first position or the toggle switch 60a is in the third position, the operating component is in the retracted state, and the cable 40 will automatically retract. When the button 60 is in the second position or the toggle switch 60a is in the fourth position, the operating component is in the extended state, and the cable 40 can be pulled out.

[0103] The anti-skid chain lockers provided in Embodiments 1 and 2 above are both equipped with an additional rotation restriction structure to prevent the cable 40 from automatically retracting under the action of the retraction spring 90 when the operating component is in the extended state.

[0104] like Figure 4 As shown, the inner surface of the second wall has a plurality of inclined recesses 12, which are arranged around the central axis 20. The surface of the rotating tooth 30 opposite to the inner surface of the second wall has elastic protrusions 32.

[0105] Each inclined pit 12 is composed of an inclined surface 121 with a certain inclination angle and an abutment surface 122 with a relative perpendicular angle. The interval between two adjacent inclined pits 12 is the same arc, and the inclination direction of the inclined surface 121 of each inclined pit 12 is the same.

[0106] In practical applications, such as Figure 5 As shown, when the operating component is in the extended state, the elastic protrusion 32 is located close to the inner surface of the second wall. When the rotating tooth 30 rotates in the extended direction, the inclined surface 121 of the inclined recess 12 comes into contact with the elastic protrusion 32, thereby squeezing the elastic protrusion 32 back so that it does not affect the rotation of the rotating tooth 30.

[0107] When the rotating tooth 30 rotates in the retraction direction, the contact surface 122 of the inclined recess 12 abuts against the elastic protrusion 32. At this time, the elastic protrusion 32 will not be squeezed and retracted, but will instead abut against the contact surface 122, thereby restricting the rotation of the rotating tooth 30 in the retraction direction.

[0108] Specifically, such as Figure 10 As shown, the elastic protrusion 32 is a metal spring 321 disposed on the rotating tooth 30. The metal spring is basically bent into a triangular shape. One end of the metal spring 321 is a fixed end 321a, which is fixed in the recess 33 of the rotating tooth 30 for accommodating the elastic protrusion, and the other end of the metal spring is a free end 321b, which is locked and restricted on the other side of the recess 33.

[0109] During assembly, first, following the steps indicated by arrow 1, the fixed end 321a is locked and fixed on one side of the recess 33, and then following the steps indicated by arrow 2, the free end 321b is locked on the other side of the recess 33.

[0110] Therefore, when the metal spring 321 is compressed, the free end 321b leaves the recess 33 and is retracted into the recess 33. When there is no external force, the free end 321b of the metal spring 321 is stuck in the recess 33, and the metal spring 321 protrudes from the recess 33.

[0111] The rotation limiting mechanism provided in this application differs from the traditional structural design that uses elastic protrusions and wedge-shaped limiting blocks. By directly forming an inclined recess on the inner surface of the locking housing, it eliminates the need for additional independent limiting blocks or inclined protrusion structures. This achieves the same rotation limiting function without increasing the overall thickness of the structure, effectively solving problems such as assembly interference and insufficient space caused by increased structural height. It also helps to further reduce the thickness of the anti-slip chain locker.

[0112] In some embodiments, to ensure the strength of the connection structure between the cable 40 and the rotating teeth 30 in the anti-skid chain locker, such as Figure 12 As shown, the end of the cable 40 is provided with an enlarged portion 41. The rotating tooth 30 is provided with a through hole for the cable to pass through.

[0113] The enlarged portion 41 is a head structure fixed to the end of the cable 40 by casting after the end of the cable 40 passes through the through hole of the rotating tooth 30. Its overall size and volume are larger than the through hole of the rotating tooth 30, and it can abut against the rotating tooth 30 to ensure that the cable 40 will not detach from the rotating tooth 30.

[0114] The cable 40 fixing method provided in this embodiment differs from the traditional method of fixing the cable by setting cable slots on the rotating teeth. It uses the enlarged part 41 formed by casting the head to ensure the fixed connection between the cable 40 and the rotating teeth 30, which can provide strong structural connection strength and ensure that the cable 40 will not easily come out of the rotating teeth 30.

[0115] In some embodiments, to ensure the waterproof performance of the anti-skid chain lock and improve its reliability, the anti-skid chain lock is provided with a variety of waterproof structures to ensure that the anti-skid chain lock has a complete and sealed housing structure after being assembled onto the wheel.

[0116] Specifically, such as Figure 13 and Figure 14 As shown, one type of waterproof structure includes: a water-blocking protrusion 65a disposed on the toggle switch 60a and a water-blocking groove 66b disposed on the latch housing 10.

[0117] The water-blocking protrusion 65a and the water-blocking groove 66b have matching sizes and shapes. When the toggle switch 60a is in the third position, the water-blocking protrusion 65a is contained and locked in the water-blocking groove 66b, improving the airtightness between the toggle switch 60a and the locking housing 10, so as to prevent water vapor from entering the interior of the locking housing 10.

[0118] More specifically, such as Figure 15 As shown, another waterproof structure includes a flange structure B disposed between the upper housing 14 and the lower housing 13. The flange structure B extends along the joint edge of the upper housing 14 and the lower housing 13 and serves as a welded connection area.

[0119] In the actual assembly process, the high-frequency vibration energy is applied to the flange structure B through ultrasonic welding, causing its contact interface to melt and fuse rapidly in the microscopic range, thereby completing the tight connection between the upper and lower shells and providing good sealing performance.

[0120] For more details, please continue reading. Figure 15 Another waterproof structure includes: an elastic seal H21 disposed at the cable outlet H2. The cable 40 passes through the elastic seal H21 and exits the locking housing 10.

[0121] The additional elastic seal H21 effectively fills the gap between the cable 40 and the cable outlet H2, ensuring the sealing of the lock housing and preventing moisture from entering.

[0122] The following describes the specific working process of the anti-skid chain locker provided in Embodiment 2 of this application as an example.

[0123] like Figure 11 As shown, when it is necessary to pull out the cable 40, the toggle switch 60a in the third position is moved to the fourth position. As the toggle switch 60a is moved to the fourth position, the second locking structure 62a locks the position of the toggle switch 60a, keeping it in the fourth position.

[0124] When the toggle switch 60a is in the fourth position, the linkage component 70 drives the rotating tooth 30 to move along the central axis away from the first wall. At this time, the first plane ratchet and the second plane ratchet disengage from each other, allowing the rotating tooth 30 to rotate in the extension direction, and the cable 40 can be pulled out to a greater length.

[0125] Furthermore, as the rotating tooth 30 moves away from the first wall, the elastic protrusions 32 on the rotating tooth 30 enter the multiple inclined recesses 12 formed on the inner surface of the second wall. Therefore, when the rotating tooth 30 rotates in the retraction direction, the contact surface 122 of the inclined recesses 12 abuts against the elastic protrusions 32. At this time, the elastic protrusions 32 are not squeezed and retracted, but rather abut against the contact surface 122, thereby restricting the rotation of the rotating tooth 30 in the retraction direction and preventing the cable 40 from automatically retracting.

[0126] When cable 40 needs to be retrieved, the toggle switch 60a, which is locked in the fourth position, is reversed and moved to the third position. When the toggle switch 60a is rotated to the third position, the linkage component 70 causes the rotating tooth 30 to move along the central axis towards the first wall. At this time, the first planar ratchet and the second planar ratchet will mesh with each other, and the elastic protrusion 32 provided on the rotating tooth 30 will leave the inclined recess 12. The abutment surface 122 of the inclined recess 12 will no longer restrict the rotating tooth 30 from rotating in the retrieval direction.

[0127] Thus, driven by the recovery spring 90, the rotating tooth 30 can automatically rotate in the recovery direction, recovering the cable 40 into the locking housing 10, thereby locking the anti-skid chain.

[0128] like Figure 16 As shown, this application also describes an automotive snow chain, comprising: a snow chain and a snow chain locker as described in this application, wherein the snow chain wraps around the tire during installation, and the snow chain locker is used to lock the snow chain.

[0129] The above description, in conjunction with specific / preferred embodiments, provides a further detailed explanation of this application and should not be construed as limiting the specific implementation of this application to these descriptions. Those skilled in the art can make various modifications and improvements without departing from the concept of this application, and all of these fall within the scope of protection of this application.

Claims

1. A chain locking device, 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 an operating component outlet and a cable outlet; The inner surface of the first wall is provided with a first planar ratchet; The inner surface of the second wall is provided with a plurality of inclined recesses, each of the inclined recesses comprising: an inclined surface and an abutment surface; A central shaft is formed inside the latch housing and is parallel to the thickness direction of the latch housing; a plurality of inclined recesses are arranged around the central shaft. 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, and the surface of the rotating tooth opposite to the inner surface of the second wall is provided with an elastic protrusion; A cable, which is wound around the rotating tooth, with one end fixed to the central shaft and the other end passing through the cable outlet and exiting from the locking housing; A latch, wherein the latch is fixedly connected to one end of the cable that extends out of the latch housing; An operating component, which extends through an outlet and can be switched between an extended state and a retracted state; A linkage component, one side of which is connected to the operating component and the other side of which is connected to the rotating tooth, drives the rotating tooth to move in the direction of the central axis; When the operating component is in the retraction state, 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, and the elastic protrusion leaves the inner surface of the second wall. When the operating component is in the extended state, 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, and the elastic protrusion is in close contact with the inner surface of the second wall; When the rotating tooth rotates along the extension direction, the inclined surface comes into contact with the elastic protrusion, squeezing the elastic protrusion to retract; When the rotating tooth rotates in the retraction direction, the abutting surface abuts against the elastic protrusion, restricting the rotation of the rotating tooth in the retraction direction.

2. The anti-skid chain locking device according to claim 1, characterized in that, The operating components include: A button that extends through the sidewall and is movable between a first position and a second position; A button reset component, connected to the button, is used to drive the button to reset from the second position to the first position; A locking lever, which extends through the sidewall and is movable between a locked position and an unlocked position; A locking paddle reset component is connected to the locking paddle and is used to drive the locking paddle to reset from the unlocked position to the locked position.

3. The anti-skid chain locking device according to claim 2, characterized in that, A sloping push-lock structure is formed between the locking lever and the button; The locking lever is provided with a limit block, and the button is provided with a contact slope corresponding to the limit block; During the process of the button moving from the first position to the second position, the contact ramp guides the limiting block to move, so that the locking lever moves in the direction of the unlocking position; When the button moves to the second position, the limiting block passes over the contact slope, and the locking paddle automatically resets to the locking position under the action of the locking paddle reset member, so that the limiting block engages with the button and keeps the button in the second position.

4. The anti-skid chain locking device according to claim 1, characterized in that, The operating components include: A toggle switch extends through the side wall and is rotatably connected to the latch housing, and can rotate between a third position and a fourth position; A first locking structure is disposed between the toggle switch and the latch housing; The second locking structure is disposed at the rotary connection of the toggle switch; Wherein, when the toggle switch is in the third position, the first locking structure prevents the toggle switch from leaving the third position; When the toggle switch is rotated to the fourth position, the second locking structure prevents the toggle switch from remaining in the fourth position.

5. The 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 operating component; 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 operating component is in the extended state, the engaging portion drives the movable component to rotate around the pivot, 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.

6. The anti-skid chain locking device according to claim 1, characterized in that, The elastic protrusion is a metal spring piece disposed on the rotating tooth; the rotating tooth has a recess for accommodating the metal spring piece; One end of the metal spring is a fixed end, fixed in the recess of the rotating tooth, and the other end of the metal spring is a free end, which is restricted in the recess of the rotating tooth.

7. The anti-skid chain locking device according to claim 5, 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.

8. The anti-skid chain locking device according to claim 5, characterized in that, The first planar ratchet and the second planar ratchet have an inclined tooth surface structure; The inclined tooth surface structure includes a central part and an outer peripheral part. The central part extends outward from the central axis by a predetermined length. The tooth surface height of the central part is greater than the tooth surface height of the outer peripheral part, so as to form a retraction position and a locking position. When in the recycle position, the first planar ratchet and the second planar ratchet engage only by their central portions; When in the locking position, the outer peripheral portions of the first planar ratchet and the second planar ratchet engage. Wherein, when the rotating tooth rotates in the retraction direction, the first planar ratchet and the second planar ratchet are in sliding engagement, allowing the rotating tooth to rotate in the retraction direction; When the rotating tooth rotates in the extension direction, the first planar ratchet and the second planar ratchet engage in a locking engagement, restricting the rotation of the rotating tooth in the extension direction.

9. The 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 fixedly connected by fasteners; At least one waterproof structure is provided between the upper and lower housings, and between the operating component and the locking housing.

10. A car snow chain, characterized in that, include: Anti-skid chains and anti-skid chain lockers as described in any one of claims 1-9.

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