Automatic chain tightening device

Abstract

The utility model relates to an automatic chain tightening device which comprises a base, an upper cover, a rotating wheel, two locking arms and a pull rope, the rotating wheel is rotatably installed in the base, the two locking arms are rotatably installed on the two sides of the rotating wheel, the upper cover is fixed on the base, one end of the pull rope is fixed and wound on the rotating wheel, and the automatic chain tightening device further comprises a rotation control assembly. The rotation control assembly is rotationally installed between the two locking arms, and the rotation control assembly controls one locking arm not to make contact with the rotating wheel at a time. The number of parts is reduced, an executing mechanism is simplified, the failure probability of internal parts is reduced, and the reliability of the tightener is improved.

Description

Technical Field

[0001] The utility model relates to the field of anti-skid chain accessories, in particular to an automatic chain tightening device. Background Art

[0002] Automobile tire anti-skid chains (hereinafter referred to as anti-skid chains) are a component wrapped around automobile tires. They are used on slippery roads such as snow and mud. They can increase the vehicle's traction on slippery roads, thereby improving grip and improving driving safety on slippery roads.

[0003] Anti-skid chains are generally composed of a main chain, side chains, steel wire ropes and locking chains. The main chain covers the tread of the tire, the steel wire ropes and side chains connect the ends of the main chain and cover the side walls of the tire, one end of the locking chain is fixed to the side chain, and the other end is provided with an elastic part, which can provide a certain pre-tightening force when the locking chain tightens the side chain, so that the anti-skid chain can fit more closely to the tire.

[0004] After driving for a period of time, such anti-skid chains will become loose due to the gaps between the chain links. It is necessary to get off the car and adjust the locking chain several times so that the anti-skid chain can perfectly cover the tire and exert the best anti-skid performance of the anti-skid chain. However, anti-skid chains are often used on snowy ground with very low temperatures. It is inconvenient for people to operate the locking chain after getting out of the car, and extreme weather can easily cause people to feel uncomfortable.

[0005] The patent name is "Automatic Tightener" and the patent number is "CN218021079U". It discloses an automatic tightener that replaces the traditional locking chain and can continuously tighten the side chain to a certain extent without getting off the vehicle to adjust, thus achieving a self-tightening effect. However, this automatic tightener uses a large number of parts during the assembly process, which leads to failure during use. Utility Model Content

[0006] In view of the defects of the prior art, the technical problem to be solved by the utility model is to provide an automatic chain tightening device, which reduces the use of parts, simplifies the actuator, reduces the probability of failure of internal parts, and improves the reliability of the tightener.

[0007] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0008] A chain automatic tightening device comprises a base, an upper cover, a swivel wheel, a locking arm and a pull rope. The swivel wheel is rotatably installed in the base. There are two locking arms, which are rotatably installed on both sides of the swivel wheel. The upper cover is fixed on the base. One end of the pull rope is fixed and wound on the swivel wheel. The device also comprises a rotation control component, which is rotatably installed in the middle of the two locking arms. The rotation control component controls one locking arm at a time so that it does not contact the swivel wheel.

[0009] With such a structure, the rotary wheel has rotatability. When the rotary control component opens one locking arm, the locking arm on the other side rests on the rotary wheel. At this time, the pull rope can be pulled out of the rotary wheel. The locking arm resting on the rotary wheel allows the rotary wheel to rotate clockwise, but not counterclockwise. When the rotary control component rotates, the states of the locking arms on both sides are interchanged. At this time, the rotary wheel drives the pull rope to rotate automatically. At this time, the locking arm resting on the rotary wheel allows the rotary wheel to rotate counterclockwise, but not clockwise. The state switching of the locking arms on both sides is achieved only by rotating the control component, which reduces the use of parts, simplifies the actuator, reduces the probability of failure of internal parts, and improves the reliability of the tightener.

[0010] Preferably, the rotation control assembly comprises an eccentric rotor, which is rotatably mounted on the base, and one end of the eccentric rotor is provided with a supporting portion, which supports the locking arm. The supporting portion more effectively separates the locking arm from the rotating wheel, thereby improving the reliability of the mechanism.

[0011] Furthermore, the rotation control assembly also includes a support arm and a connecting plate, the connecting plate is fixed on the eccentric rotor, and the support arm is fixedly mounted on the connecting plate. The block design reduces the difficulty of assembly, and the long support arm obtains a larger force arm during the rotation process, which reduces the difficulty of dialing.

[0012] Specifically, the connection plate is provided with a boss, the bottom of the boss is provided with a flange, the upper cover is provided with a component hole, the boss protrudes into the installation component hole, and the flange is stuck on the inner side of the upper cover. Since the support arm is too long, it needs to be installed on the outside of the upper cover, which requires the top support part and the connection plate to be installed in the bottom shell and the upper cover first. If there is no flange, the top support part and the connection plate will fall off. Such a flange design prevents falling off and improves the ease of assembly.

[0013] Preferably, the rotary wheel includes a ratchet and an energy storage spring, the ratchet is hollow inside, the ratchet is rotatably mounted on the base, the energy storage spring is mounted in the ratchet, and the energy storage spring is connected to the base. The energy storage spring is a spiral spring, which has a long service life and improves the reliability of the tightener.

[0014] Preferably, the locking arm comprises a tooth arm and a coil spring, the tooth arm is rotatably mounted on the base, and the coil spring is mounted between the end of the tooth arm and the base. The coil spring can provide strong pressure to prevent locking failure and improve the reliability of the tightener.

[0015] As a preferred embodiment, a handle is further included, a drawstring channel is provided between the base and the upper cover, the drawstring passes through the drawstring channel to the outside of the base and the upper cover, and the handle is fixed to one end of the drawstring. The handle can conveniently pull out the drawstring, thereby improving the usability of the tightener.

[0016] As a preferred embodiment, a protective cover is also included, which is installed in the drawstring channel. The protective cover can prevent the handle from rebounding suddenly due to incorrect operation, thereby reducing the possibility of accidental damage.

[0017] As a preferred embodiment, the pull rope is a steel wire rope. The traction force of the vehicle is relatively large, requiring the pull rope to have a relatively high strength, and the steel wire rope has a relatively high strength, which improves the reliability of the tightener.

[0018] Preferably, the base and the upper cover are fixed by riveting, thereby improving the connection strength of the tightener body.

[0019] In summary, such an automatic chain tightening device reduces the use of parts, simplifies the actuator, reduces the probability of failure of internal parts, and greatly improves the reliability of the tightening device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0021] Figure 1 is a schematic diagram of the assembly structure of the embodiment;

[0022] Figure 2 is a schematic diagram of the structure of the rotary wheel and the eccentric rotor of the embodiment;

[0023] Figure 3 is a schematic structural diagram of a rotation control assembly of the embodiment;

[0024] Figure 4 is a schematic diagram of the boss and flange structure of the connecting disk of the embodiment;

[0025] Figure 5 is a schematic diagram of the assembly structure of the rotation control component, the ratchet wheel and the locking arm of the embodiment;

[0026] Among them, base-1, rope channel-11, upper cover-2, component hole-21, rotating wheel-3, ratchet-31, energy storage spring-32, locking arm-4, tooth arm-41, coil spring-42, rope-5, rotation control component-6, eccentric rotor-61, support part-611, support arm-62, connecting plate-63, boss-631, flange-632, handle-7, protective cover-8. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0028] A chain automatic tightening device includes a base 1, an upper cover 2, a rotating wheel 3, a locking arm 4 and a pull rope 5. The rotating wheel 3 is rotatably installed in the base 1. There are two locking arms 4, which are rotatably installed on both sides of the rotating wheel 3. The upper cover 2 is fixed on the base 1. One end of the pull rope 5 is fixed and wound on the rotating wheel 3. The device also includes a rotation control component 6. The rotation control component 6 is rotatably installed in the middle of the two locking arms 4. The rotation control component 6 controls one locking arm 4 at a time so that it does not contact the rotating wheel 3.

[0029] With such a structure, the rotary wheel 3 has a rotatable property. When the rotation control component 6 pushes away the locking arm 4 on one side, the locking arm 4 on the other side is placed on the rotary wheel 3. At this time, the pull rope 5 can be pulled out of the rotary wheel 3 when it is pulled out. The locking arm 4 placed on the rotary wheel 3 allows the rotary wheel 3 to rotate clockwise, but not counterclockwise. When the rotation control component 6 rotates, the states of the locking arms 4 on both sides are interchanged. At this time, the rotary wheel 3 drives the pull rope 5 to rotate automatically. At this time, the locking arm 4 placed on the rotary wheel 3 allows the rotary wheel 3 to rotate counterclockwise, but not clockwise. The state switching of the locking arms 4 on both sides is achieved only by the rotation control component 6, which reduces the use of parts and elastic parts, simplifies the actuator, reduces the probability of failure of internal parts, and improves the reliability of the tightener.

[0030] Preferably, the rotation control assembly 6 includes an eccentric rotor 61, which is rotatably mounted on the base 1, and one end of the eccentric rotor 61 is provided with a supporting portion 611, which supports the locking arm 4. The supporting portion 611 more effectively separates the locking arm 4 from the rotating wheel 3, thereby improving the reliability of the mechanism.

[0031] Furthermore, the rotation control assembly 6 also includes a support arm 62 and a connecting disk 63, the connecting disk 63 is fixed on the eccentric rotor 61, and the support arm 62 is fixedly mounted on the connecting disk 63. The block design reduces the difficulty of assembly, and the long support arm 62 obtains a larger force arm during the rotation process, which reduces the difficulty of dialing.

[0032] Specifically, the connection plate 63 is provided with a boss 631, the bottom of the boss 631 is provided with a flange 632, the upper cover 2 is provided with a component hole 21, the boss 631 protrudes into the installation component hole 21, and the flange 632 is stuck on the inner side of the upper cover 2. Since the support arm 62 is too long, it needs to be installed on the outside of the upper cover 2, which requires the support portion 611 and the connection plate 63 to be installed in the bottom shell and the upper cover 2 first. If there is no flange 632, the support portion 611 and the connection plate 63 will fall off. The design of the flange 632 prevents falling off and improves the ease of assembly.

[0033] Preferably, the rotary wheel 3 includes a ratchet 31 and an energy storage spring 32, wherein the ratchet 31 is hollow inside, the ratchet 31 is rotatably mounted on the base 1, the energy storage spring 32 is mounted in the ratchet 31, and the energy storage spring 32 is connected to the base 1. The energy storage spring 32 is a spiral spring, which has a long service life and improves the reliability of the tightener.

[0034] Preferably, the locking arm 4 includes a tooth arm 41 and a coil spring 42, the tooth arm 41 is rotatably mounted on the base 1, and the coil spring 42 is mounted between the end of the tooth arm 41 and the base 1. The coil spring 42 can provide strong pressure to prevent locking failure and improve the reliability of the tightener.

[0035] Preferably, a handle 7 is further included, a drawstring 5 channel 11 is provided between the base 1 and the upper cover 2, the drawstring 5 passes through the drawstring 5 channel 11 to the outside of the base 1 and the upper cover 2, and the handle 7 is fixed to one end of the drawstring 5. The handle 7 can conveniently pull out the drawstring 5, thereby improving the usability of the tightener.

[0036] As a preferred embodiment, a protective cover 8 is also included, and the protective cover 8 is installed in the channel 11 of the pull rope 5. The protective cover 8 can prevent the handle 7 from rebounding suddenly due to incorrect operation, thereby reducing the possibility of accidental damage.

[0037] As a preference, the pull rope 5 is a steel wire rope. The traction force of the vehicle is relatively large, requiring the pull rope 5 to have a relatively high strength, and the steel wire rope has a relatively high strength, which improves the reliability of the tightener.

[0038] Preferably, the base 1 and the upper cover 2 are fixed by riveting, thereby improving the connection strength of the tightener body.

[0039] In summary, such an automatic chain tightening device reduces the use of parts, simplifies the actuator, reduces the probability of failure of internal parts, and greatly improves the reliability of the tightening device.

[0040] In short, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic chain tightening device, comprising a base, an upper cover, a rotating wheel, a locking arm and a pull rope, wherein the rotating wheel is rotatably mounted in the base, there are two locking arms, and the two locking arms are rotatably mounted on both sides of the rotating wheel, the upper cover is fixed on the base, and one end of the pull rope is fixed and wound on the rotating wheel, characterized in that: It also includes a rotation control component, which is rotatably installed in the middle of the two locking arms. The rotation control component controls one locking arm at a time to prevent it from contacting the rotating wheel.

2. The automatic chain tightening device according to claim 1, characterized in that: The rotation control assembly comprises an eccentric rotor, which is rotatably mounted on a base. One end of the eccentric rotor is provided with a supporting portion, which supports a locking arm.

3. The automatic chain tightening device according to claim 2, characterized in that: The rotation control assembly also includes a support arm and a connecting disk. The connecting disk is fixed on the eccentric rotor, and the support arm is fixedly mounted on the connecting disk.

4. The automatic chain tightening device according to claim 3, characterized in that: The connection plate is provided with a boss, the bottom of the boss is provided with a flange, the upper cover is provided with a component hole, the boss protrudes into the installation component hole, and the flange is clamped on the inner side of the upper cover.

5. The automatic chain tightening device according to claim 4, characterized in that: The rotary wheel comprises a ratchet and an energy storage spring. The ratchet is hollow inside and is rotatably mounted on a base. The energy storage spring is mounted in the ratchet and is connected to the base.

6. The automatic chain tightening device according to claim 5, characterized in that: The locking arm comprises a tooth arm and a coil spring. The tooth arm is rotatably mounted on the base, and the coil spring is mounted between the end of the tooth arm and the base.

7. The automatic chain tightening device according to claim 6, characterized in that: It also includes a handle, a drawstring channel is provided between the base and the upper cover, the drawstring passes through the drawstring channel to the outside of the base and the upper cover, and the handle is fixed to one end of the drawstring.

8. The automatic chain tightening device according to claim 7, characterized in that: Also included is a protective cover that is mounted within the drawstring channel.

9. The automatic chain tightening device according to claim 8, characterized in that: The pull rope is a steel wire rope.

10. The automatic chain tightening device according to claim 8, characterized in that: The base and the upper cover are fixed by riveting.

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