Anti-falling outer chain link and chain

Abstract

The utility model relates to the technical field of transmission chains, in particular to an anti-falling outer chain link and a chain, one end of a first limiting piece is provided with a first bayonet, the middle of the first limiting piece is provided with a receding through groove, one side of the receding through groove is communicated with a second bayonet, the middle of the first limiting piece is connected with a clamping piece, two pin shafts are provided with annular grooves, and the clamping piece is connected with the annular grooves. A clamping groove is formed in the middle of a second outer chain plate, a first clamping opening and a second clamping opening are connected to the two annular grooves in a clamped mode respectively, a first limiting piece abuts against one side of the second outer chain plate, limiting of the second outer chain plate is achieved, and then a clamping piece is beaten to be changed into a bent inclined state from a vertical state. The clamping piece is further clamped into the clamping groove to form a locking state, the first limiting piece is prevented from moving due to vibration, the first limiting piece and the second outer chain plate are further prevented from falling off from the pin shaft, the clamping piece needs to be upwarped or cut off through a screwdriver to be disassembled when taken out, and the structural stability and reliability are improved.

Description

Technical Field

[0001] This utility model relates to the field of transmission chain technology, and in particular to an anti-detachment outer chain link and chain. Background Technology

[0002] Chains are metal links or rings, mostly used for mechanical transmission and traction. A chain consists of multiple outer links and inner links that are alternately hinged. An outer link includes two outer links and two pins. One outer link is fixedly connected to the two pins, while the other outer link is movably connected to the pin. The inner link is inserted into the pin, and then the movable outer link is inserted into the pin. A limiting plate is then used to lock the movable outer link onto the pin. However, current limiting plates are prone to falling off the outer link due to vibration, causing the movable outer link to be unlocked, which reduces the stability and reliability of the connection structure between the outer and inner links. Utility Model Content

[0003] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide an anti-detachment outer link and chain that improves structural stability and reliability.

[0004] The technical solution adopted in this utility model is as follows:

[0005] An anti-detachment outer link includes a first outer link plate, a second outer link plate, and two parallel pins fixedly connected to the first outer link plate. The pins pass through the second outer link plate. The link also includes a first limiting piece, one end of which has a first latch and a clearance groove in its middle. A second latch is connected to the side of the clearance groove away from the first latch. A card is connected to the middle of the first limiting piece, one end of which is connected to the side of the clearance groove away from the second latch, and the other end extends towards the side near the second latch and extends outward at an angle from the clearance groove. The side of the second outer link plate away from the first outer link plate abuts against the first limiting piece. Both pins have annular grooves, and the first latch and the second latch are respectively engaged in the two annular grooves. A slot is provided in the middle of the second outer link plate, and the card is engaged in the slot.

[0006] Preferably, it also includes a second limiting piece with the same structure as the first limiting piece, the second limiting piece being engaged with the side of the first outer chain plate away from the second outer chain plate.

[0007] Preferably, the side of the clearance channel is provided with a notch.

[0008] This utility model also provides a chain that includes any of the aforementioned anti-detachment outer chain links.

[0009] The beneficial effects of this utility model are as follows:

[0010] This anti-detachment outer link uses the first and second latches of the first limiting plate to engage with the two annular grooves of the pin shaft. The first limiting plate abuts against the side of the second outer link plate away from the first outer link plate, thus limiting the second outer link plate. Then, by tapping the card, the card is deformed from a vertical state to a bent and tilted state, thereby locking the card into the slot and forming a locking state. This prevents the first limiting plate from moving due to vibration, and thus prevents the first limiting plate and the second outer link plate from falling off the pin shaft. To remove it, the card needs to be pried up with a screwdriver or cut off, thus improving the structural stability and reliability. Attached Figure Description

[0011] Figure 1 This is a three-dimensional schematic diagram of the present invention.

[0012] Figure 2 This is a first exploded view of the present invention.

[0013] Figure 3 This is a schematic diagram of the first structure of the first limiting piece.

[0014] Figure 4 This is a second exploded view of the present invention.

[0015] Figure 5 This is a schematic diagram of the second structure of the first limiting piece.

[0016] In the figure: 1. First outer link plate; 2. Second outer link plate; 3. Pin; 4. First limiting piece; 5. First bayonet; 6. Clearance slot; 7. Second bayonet; 8. Card; 9. Annular groove; 10. Card slot; 11. Second limiting piece; 12. Notch. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figures 1-3This utility model provides a technical solution: an anti-detachment outer chain link, including a first outer chain plate 1, a second outer chain plate 2, and two pins 3 arranged in parallel to each other and fixedly connected to the first outer chain plate 1. The pins 3 pass through the second outer chain plate 2. It also includes a first limiting piece 4. One end of the first limiting piece 4 is provided with a first latch 5, and the middle part is provided with an avoidance groove 6. The side of the avoidance groove 6 away from the first latch 5 is connected to a second latch 7. The middle part of the first limiting piece 4 is connected with a card 8. One end of the card 8 is connected to the side of the avoidance groove 6 away from the second latch 7, and the other end extends towards the side close to the second latch 7 and extends outward at an angle from the avoidance groove 6. The side of the second outer chain plate 2 away from the first outer chain plate 1 abuts against the first limiting piece 4. Both pins 3 are provided with annular grooves 9. The first latch 5 and the second latch 7 are respectively engaged in the two annular grooves 9. The middle part of the second outer chain plate 2 is provided with a slot 10, and the card 8 is engaged in the slot 10.

[0019] The distance between the first outer link plate 1 and the second outer link plate 2 is set according to the chain width. During installation, first insert the inner link into the pin 3, then insert the second outer link plate 2 into the pin 3. Then, the first limiting plate 4 abuts against the side of the second outer link plate 2 away from the first outer link plate 1, and pushes the first limiting plate 4 upward so that the first limiting plate 4 slides upward relative to the second outer link plate 2. At this time, the first locking slot 5 and the second locking slot 7 of the first limiting plate 4 are respectively locked onto the annular grooves 9 of the two pins 3. Then, by tapping the card 8, the card 8 is deformed from a vertical state to a bent and tilted state, thereby making the card 8 lock into the slot 10, forming a locking state, so that the first limiting plate 4 cannot slide downward relative to the second outer link plate 2, preventing the first limiting plate 10 from moving due to vibration, and thus preventing the first limiting plate 10 and the second outer link plate 2 from falling off the pin 3. When removing it, a screwdriver is needed to pry up the card 8 or cut the card 8 to remove it, thus improving the structural stability and reliability.

[0020] Please see Figure 4 To further improve the connection stability between the first outer link plate 1 and the pin 3 and prevent the first outer link plate 1 from falling off the pin 3, this embodiment preferably includes a second limiting plate 11 with the same structure as the first limiting plate 4. The second limiting plate 11 is snapped onto the side of the first outer link plate 1 away from the second outer link plate 2. The purpose is to lock and limit the first outer link plate 1 by the second limiting plate 11 when the first outer link plate 1 and the pin 3 are connected by an interference fit, so as to prevent the second limiting plate 11 and the first outer link plate 1 from falling off the pin 3 and improve the structural stability and reliability.

[0021] Please see Figure 5In order to improve the engagement effect between the second bayonet 7 and the annular groove 9, in this embodiment, preferably, a notch 12 is provided on one side of the bypass groove 6, the second bayonet 7 and the annular groove 9 are in transitional fit, and the first bayonet 5 and the annular groove 9 are in transitional fit.

[0022] This utility model also provides a chain, which includes any of the above-mentioned anti-detachment outer chain links.

[0023] The installation process of this utility model is as follows: First, insert the inner link into the pin 3, then insert the second outer link plate 2 into the pin 3. Then, the first limiting piece 4 abuts against the side of the second outer link plate 2 away from the first outer link plate 1, and pushes the first limiting piece 4 upward so that the first limiting piece 4 slides upward relative to the second outer link plate 2. At this time, the first locking slot 5 and the second locking slot 7 of the first limiting piece 4 are respectively locked onto the annular grooves 9 of the two pins 3. Then, by tapping the card 8, the card 8 is deformed from a vertical state to a bent and tilted state, so that the card 8 is locked into the slot 10, forming a locked state, so that the first limiting piece 4 cannot slide downward relative to the second outer link plate 2, preventing the first limiting piece 10 from moving due to vibration, and thus preventing the first limiting piece 10 and the second outer link plate 2 from falling off the pin 3. When removing it, a screwdriver is needed to pry up the card 8 or cut the card 8 to remove it, thus improving the structural stability and reliability.

[0024] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An anti-detachment outer chain link, comprising a first outer chain plate (1), a second outer chain plate (2), and two pins (3) fixedly connected to the first outer chain plate (1) and arranged parallel to each other, wherein the pins (3) pass through the second outer chain plate (2), characterized in that: It also includes a first limiting piece (4), one end of which is provided with a first latch (5), and the middle part is provided with a clearance groove (6). The side of the clearance groove (6) away from the first latch (5) is connected to a second latch (7). The middle part of the first limiting piece (4) is connected to a card (8). One end of the card (8) is connected to the side of the clearance groove (6) away from the second latch (7), and the other end extends towards the side close to the second latch (7) and extends outward at an angle from the clearance groove (6). The side of the second outer chain plate (2) away from the first outer chain plate (1) abuts against the first limiting piece (4). Both pins (3) are provided with annular grooves (9). The first latch (5) and the second latch (7) are respectively engaged in the two annular grooves (9). The middle part of the second outer chain plate (2) is provided with a slot (10), and the card (8) is engaged in the slot (10).

2. The anti-detachment outer link according to claim 1, characterized in that: It also includes a second limiting piece (11) with the same structure as the first limiting piece (4), the second limiting piece (11) being snapped onto the side of the first outer chain plate (1) away from the second outer chain plate (2).

3. The anti-detachment outer link according to claim 1, characterized in that: One side of the clearance groove (6) is connected to a notch (12).

4. A chain, characterized in that: Includes the anti-detachment outer chain segment as described in any one of claims 1-3.

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