Chain tensioning device

Abstract

The utility model provides a chain tensioning device, which comprises a first tensioning component, a second tensioning component and a third tensioning component, the second tensioning component is provided with a containing cavity, the containing cavity extends in the length direction of the second tensioning component, the end, away from the first hook claw, of the first tensioning component is inserted into the containing cavity, and the first tensioning component is movably arranged in the extending direction of the containing cavity; the end, away from the first tensioning component, of the second tensioning component is provided with a second hook claw. And the driving component is provided with a telescopic rod, the telescopic rod is connected with the first tensioning component and / or the second tensioning component, and the first tensioning component and / or the second tensioning component are / is driven to move through the telescopic rod. The chain tensioning device solves the problem that the tensioning effect is poor due to the fact that a flexible tensioning chain is adopted in a chain tensioning device in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of chain tensioning of a scraper conveyor, in particular to a chain tightening device. Background Art

[0002] 40T scraper conveyor is often used for coal gangue transfer in underground coal mine excavation working faces, short tunnels or shorter transfer and transportation tunnels. It is widely used due to its stable transportation capacity, easy installation and reliable use.

[0003] However, during the installation and transportation of the scraper conveyor, the scraper conveyor chain needs to be matched and docked with the middle groove of the scraper conveyor. The commonly used scraper conveyor chain length is fixed at 1m. Due to the deviation of the groove spacing or the extension of the chain during use, the chain and the middle groove of the scraper conveyor cannot fit tightly, resulting in problems such as inability to pull, chain jamming or chain tilting.

[0004] In the prior art, most of the hydraulic cylinders are directly connected to the chain, or are connected to the chain with a soft connection, etc. The structure is relatively complex, and the tensioning force transmission effect of the soft connection is poor. The tensioning chain is prone to shaking or slipping with the chain on the scraper, and elastic load is prone to occur, which poses a safety hazard to the operator during the adjustment process. Utility Model Content

[0005] The main purpose of the utility model is to provide a chain tightening device to solve the problem of poor tensioning effect caused by the flexible tensioning chain used in the chain tightening device in the prior art.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a chain tightening device is provided, including: a first tensioning component, the first tensioning component having a first hook; a second tensioning component, the second tensioning component is provided with an accommodating cavity, the accommodating cavity extends along the length direction of the second tensioning component, the end of the first tensioning component away from the first hook is inserted in the accommodating cavity, the first tensioning component is movably arranged along the extension direction of the accommodating cavity, the end of the second tensioning component away from the first tensioning component has a second hook; a driving component, the driving component has a telescopic rod, the telescopic rod is connected to the first tensioning component and / or the second tensioning component, and the first tensioning component and / or the second tensioning component are driven to move by the telescopic rod.

[0007] Furthermore, the second tensioning component includes a load-bearing end surface, the driving component is arranged on the load-bearing end surface, and an avoidance opening is also arranged on the load-bearing end surface, the avoidance opening is connected to the accommodating cavity, and the avoidance opening extends along the length direction of the second tensioning component; the chain tightening device also includes: a first baffle, which is arranged at one end of the first tensioning component away from the first hook claw, and the first baffle extends from the accommodating cavity through the avoidance opening; a second baffle, which is arranged at one end of the second tensioning component away from the second hook claw, and the telescopic rod is connected to the first baffle or the second baffle.

[0008] Furthermore, the telescopic rod is connected to the second baffle plate; the chain tightening device also includes: a first slot, which is arranged on the second baffle plate, and at least a part of the telescopic rod is inserted into the first slot.

[0009] Furthermore, the chain tightening device also includes: a slide groove, which is arranged on the bottom surface of the accommodating cavity, and the slide groove extends along the length direction of the second tensioning component; a sliding rod, which is arranged on the bottom surface of the first tensioning component, and the sliding rod extends along the length direction of the first tensioning component, and at least a portion of the sliding rod is arranged in the slide groove and slidably cooperates with the slide groove.

[0010] Furthermore, a guide opening is provided on the bottom surface of the second tensioning component, and the guide opening is connected to the accommodating cavity; the chain tightening device also includes: an insert plate, which is provided on the bottom surface of the first tensioning component, and at least a part of the insert plate is inserted into the guide opening and cooperates with the guide opening gap.

[0011] Furthermore, the chain tightening device also includes: a sliding plate, which is arranged on one end of the plug plate away from the first tensioning component, and a fitting end surface is provided on the sliding plate, and at least a part of the fitting end surface is fitted with the body of the second tensioning component that surrounds the guide opening.

[0012] Furthermore, the first tensioning component includes: a first tensioning body, at least a portion of which is inserted into the accommodating cavity; a second tensioning body, which is connected to the first tensioning body, and there is a first angle between the first tensioning body and the second tensioning body, the first angle is an obtuse angle, and the first hook is arranged at one end of the second tensioning body away from the first tensioning body.

[0013] Furthermore, there are at least two second tensioning bodies, at least two second tensioning bodies are respectively connected to the first tensioning body, there is a second angle between two adjacent second tensioning bodies, and the second angle is an acute angle; each second tensioning body is respectively provided with a first hook at one end away from the first tensioning body.

[0014] Furthermore, the second tensioning component includes: a third tensioning body, a accommodating cavity is arranged in the third tensioning body; a fourth tensioning body, connected to the third tensioning body, a third angle is formed between the fourth tensioning body and the third tensioning body, the third angle is an obtuse angle, and the second hook is arranged at one end of the fourth tensioning body away from the third tensioning body.

[0015] Furthermore, there are at least two fourth tensioning bodies, at least two fourth tensioning bodies are respectively connected to the third tensioning body, there is a fourth angle between two adjacent fourth tensioning bodies, and the fourth angle is an acute angle; each fourth tensioning body is respectively provided with a second hook at one end away from the third tensioning body.

[0016] According to the technical solution of the utility model, the chain tightening device includes a first tensioning component, a second tensioning component and a driving component, wherein the first tensioning component has a first hook, the second tensioning component is provided with a receiving cavity, the receiving cavity extends along the length direction of the second tensioning component, the end of the first tensioning component away from the first hook is inserted into the receiving cavity, the first tensioning component is movably arranged along the extension direction of the receiving cavity, and the end of the second tensioning component away from the first tensioning component has a second hook; the driving component has a telescopic rod, the telescopic rod is connected to the first tensioning component and / or the second tensioning component, and the first tensioning component and / or the second tensioning component are driven to move by the telescopic rod. Such a setting is not only simple to process, but also convenient to use. The telescopic rod is used to drive the first tensioning component and / or the second tensioning component, so that the first hook of the first tensioning component and / or the second hook of the second tensioning component are hooked together with the chain to form a pulling force, thereby achieving the purpose of tensioning the chain. The rigid telescopic rod is used to make the tensioning force more stable and improve the tensioning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0018] Figure 1 A first state diagram of the chain tightening device according to the utility model is shown;

[0019] Figure 2 A second state diagram of the chain tightening device according to the utility model is shown;

[0020] Figure 3 A top view of a first state of a chain tightening device according to the utility model is shown;

[0021] Figure 4 A top view of the chain tightening device according to the utility model in a second state is shown;

[0022] Figure 5 A schematic structural diagram of a first tensioning component in a chain tightening device according to the utility model is shown;

[0023] Figure 6 The schematic diagram of the structure of the second tensioning component in the chain tightening device according to the utility model is shown.

[0024] The above drawings include the following reference numerals:

[0025] 10. First tensioning member; 11. First hook; 20. Second tensioning member; 21. Accommodating chamber; 22. Second hook; 30. Driving member; 31. Telescopic rod; 32. Pump body; 23. Load-bearing end face; 230. Avoidance opening; 40. First baffle plate; 50. Second baffle plate; 51. Slot; 24. Slide groove; 12. Slide rod; 13. Insert plate; 14. Sliding plate; 140. Fitting end face; 15. First tensioning body; 16. Second tensioning body; 26. Third tensioning body; 27. Fourth tensioning body; 28. Handrail; 60. Positioning pin; 61. First positioning hole. DETAILED DESCRIPTION

[0026] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0027] Please refer to Figures 1 to 6 The utility model provides a chain tightening device, including: a first tensioning component 10, the first tensioning component 10 has a first hook 11; a second tensioning component 20, the second tensioning component 20 is provided with a accommodating cavity 21, the accommodating cavity 21 extends along the length direction of the second tensioning component 20, the end of the first tensioning component 10 away from the first hook 11 is inserted into the accommodating cavity 21, the first tensioning component 10 is movably arranged along the extension direction of the accommodating cavity 21, and the end of the second tensioning component 20 away from the first tensioning component 10 has a second hook 22; a driving component 30, the driving component 30 has a telescopic rod 31, the telescopic rod 31 is connected to the first tensioning component 10 and / or the second tensioning component 20, and the first tensioning component 10 and / or the second tensioning component 20 are driven to move by the telescopic rod 31.

[0028] According to the utility model, a chain tightening device is provided, including a first tensioning component 10, a second tensioning component 20 and a driving component 30, the first tensioning component 10 has a first hook 11, the second tensioning component 20 is provided with a accommodating cavity 21, the accommodating cavity 21 extends along the length direction of the second tensioning component 20, the end of the first tensioning component 10 away from the first hook 11 is inserted into the accommodating cavity 21, the first tensioning component 10 is movably arranged along the extension direction of the accommodating cavity 21, and the end of the second tensioning component 20 away from the first tensioning component 10 has a second hook 22; the driving component 30 has a telescopic rod 31, the telescopic rod 31 is connected to the first tensioning component 10 and / or the second tensioning component 20, and the first tensioning component 10 and / or the second tensioning component 20 are driven to move by the telescopic rod 31. Such a configuration is not only simple to process, but also convenient to use. The telescopic rod 31 is used to drive the first tensioning component 10 and / or the second tensioning component 20, so that the first hook 11 of the first tensioning component 10 and / or the second hook 22 of the second tensioning component 20 are hooked together with the chain to form a pulling force, thereby achieving the purpose of tensioning the chain. The rigid telescopic rod 31 is used to make the tensioning force more stable, thereby improving the tensioning effect.

[0029] Specifically, the second tensioning component 20 includes a load-bearing end surface 23, the driving component 30 is arranged on the load-bearing end surface 23, and an avoidance opening 230 is also arranged on the load-bearing end surface 23. The avoidance opening 230 is connected to the accommodating cavity 21, and the avoidance opening 230 extends along the length direction of the second tensioning component 20; the chain tightening device also includes: a first baffle 40, which is arranged at one end of the first tensioning component 10 away from the first hook 11, and the first baffle 40 extends from the accommodating cavity 21 through the avoidance opening 230; the second baffle 50, which is arranged at one end of the second tensioning component 20 away from the second hook 22, and the telescopic rod 31 is connected to the first baffle 40 or the second baffle 50. When the telescopic rod 31 is connected to the first baffle 40, the telescopic rod 31 drives the first tensioning component 10 to move relative to the second tensioning component 20 during the telescopic process, so that the first hook 11 hooks the chain to keep the chain in a tensioned state at all times; when the telescopic rod 31 is connected to the second baffle 50, the telescopic rod 31 drives the second tensioning component 20 to move relative to the first tensioning component 10 during the telescopic process. At this time, the moving position of the second tensioning component 20 is used to adjust the tensioning force of the chain, so that the chain is always kept in a tensioned state.

[0030] Preferably, the telescopic rod 31 is connected to the second baffle 50; the chain tightening device further comprises: a first slot 51, which is arranged on the second baffle 50, and at least a part of the telescopic rod 31 is inserted into the first slot 51. The telescopic rod 31 is matched with the second baffle 50 through the first slot 51, so that the telescopic rod 31 can drive the second baffle 50 to move. Among them, an anti-skid ring is arranged in the first slot 51, and the anti-skid ring is arranged in the first slot 51 and fixedly connected to the first slot 51. The end of the telescopic rod 31 is inserted in the first slot 51 and fits with the anti-skid ring. The anti-skid ring is made of rubber. When the telescopic rod 31 is inserted into the first slot 51, it is interference-fitted with the anti-skid ring, so that the telescopic rod 31 drives the second tensioning component 20 to move through the second baffle 50.

[0031] In the specific implementation process, the chain tightening device further includes: a slide groove 24, which is arranged on the bottom surface of the accommodating cavity 21, and the slide groove 24 extends along the length direction of the second tensioning component 20; a slide rod 12, which is arranged on the bottom surface of the first tensioning component 10, and the slide rod 12 extends along the length direction of the first tensioning component 10, and at least part of the slide rod 12 is arranged in the slide groove 24 and slidably cooperates with the slide groove 24. The slide rod 12 cooperates with the slide groove 24, and guides the first tensioning component 10 and the second tensioning component 20 during the relative movement of the first tensioning component 10 and the second tensioning component 20.

[0032] In another embodiment provided by the utility model, a guide opening is provided on the bottom surface of the second tensioning member 20, and the guide opening is communicated with the accommodating cavity 21; the chain tightening device further comprises: an insert plate 13, which is provided on the bottom surface of the first tensioning member 10, and at least a part of the insert plate 13 is inserted into the guide opening and matches with the guide opening gap. The insert plate 13 matches with the guide opening to achieve the guidance of the first tensioning member 10 and the second tensioning member 20 during the movement, and preferably, the guide opening extends along the length direction of the second tensioning member 20.

[0033] Furthermore, the chain tightening device further includes: a sliding plate 14, which is arranged on one end of the plug plate 13 away from the first tensioning member 10, and a fitting end surface 140 is arranged on the sliding plate 14, and at least a part of the fitting end surface 140 fits with the body of the second tensioning member 20 that forms the guide opening. By fitting the plug plate 13 and the body of the second tensioning member 20 that forms the guide opening, the first tensioning member 10 is kept stable during the movement, and the first tensioning member 10 is prevented from tilting during the movement, causing the plug plate 13 to be separated from the guide opening.

[0034] In the specific implementation process, the first tensioning component 10 includes: a first tensioning body 15, at least part of which is inserted into the accommodating cavity 21; a second tensioning body 16, which is connected to the first tensioning body 15, and there is a first angle between the first tensioning body 15 and the second tensioning body 16, and the first angle is an obtuse angle, and the first hook 11 is arranged at one end of the second tensioning body 16 away from the first tensioning body 15. Such an arrangement increases the moment of the first tensioning component 10, so that the first hook 11 can generate sufficient tension to keep the chain in a tensioned state.

[0035] In order to further cooperate with the chain stably, there are at least two second tensioning bodies 16, at least two second tensioning bodies 16 are respectively connected to the first tensioning body 15, and there is a second angle between two adjacent second tensioning bodies 16, and the second angle is an acute angle; each second tensioning body 16 is respectively provided with a first hook 11 at one end away from the first tensioning body 15. In this way, the first hook 11 on each second tensioning body 16 can be used to hook on the chain, so that the chain is stably stressed.

[0036] In the present application, the second tensioning component 20 includes: a third tensioning body 26, in which the accommodating cavity 21 is disposed; a fourth tensioning body 27, which is connected to the third tensioning body 26, and a third angle is formed between the fourth tensioning body 27 and the third tensioning body 26, and the third angle is an obtuse angle, and the second hook 22 is disposed at one end of the fourth tensioning body 27 away from the third tensioning body 26. Such a configuration can increase the moment of the second tensioning component 20, so that the second hook 22 generates sufficient tension to keep the chain in a tensioned state.

[0037] In order to further cooperate with the chain stably, there are at least two fourth tensioning bodies 27, at least two fourth tensioning bodies 27 are respectively connected to the third tensioning body 26, and there is a fourth angle between two adjacent fourth tensioning bodies 27, and the fourth angle is an acute angle; each fourth tensioning body 27 is respectively provided with a second hook 22 at one end away from the third tensioning body 26. In this way, the second hook 22 on each fourth tensioning body 27 can be used to hook on the chain, so that the chain is stably stressed.

[0038] In the present application, the driving component 30 is an anchor cable tensioner, which is connected to a pump body 32 . The pump body 32 is an air pump, and the telescopic rod 31 in the driving component 30 is driven to extend and retract by the air pump.

[0039] Specifically, a handrail 28 is further provided on the second tensioning component 20, and the chain tightening device is carried by the handrail 28. A plurality of first positioning holes 61 are further provided on the third tensioning body 26. The first positioning holes 61 are spaced apart along the length direction of the third tensioning body 26. A positioning pin 60 is further provided on the third tensioning body 26. The positioning pin 60 is connected to the third tensioning body 26 through a rope body. A second positioning hole is provided on the first tensioning body 15. The positioning pin 60 passes through a first positioning hole 61 and a second positioning hole of the plurality of first positioning holes 61 in sequence to fix the first tensioning component 10 at a predetermined position. Preferably, the second positioning hole can be one or more, so that the first tensioning component 10 is conveniently positioned.

[0040] During use, first place the device in the scraper conveyor trough, place the hooks in the four horseshoe buckles or buckle them firmly in the chain, turn on the pump box switch, observe the chain tension, and when the chain is loose enough to be disassembled, stop the pump and insert the positioning pin 60 to operate. After the operation is completed, pull out the positioning pin 60 and supply air to loosen the pump. After the operation is completed, recycle the device.

[0041] The chain tightening device of the present application is (1) simple to manufacture, easy to obtain materials, and extremely low in cost. It can be manufactured with only the price of a piece of flat steel or only scraps, which can greatly save costs; (2) simple to assemble and install, meeting the needs, and cleverly designed to be applicable to various types of excavation working faces or 40t scraper conveyor transportation and relocation work sites; the welding size can also be extended or shortened according to actual needs; (3) the use of pneumatic anchor cable tensioning equipment can quickly achieve tensioning, and the cleverly designed fixing pin can prevent the risk of pressure release of the tensioning equipment cylinder, and prevent the device from retracting due to tension and other factors; (4) rigidity The design can effectively avoid the risks caused by the elastic potential energy of previous operations or soft connection devices, greatly improving safety benefits; (5) It is cleverly involved in the 25cm high operation, which can create good working conditions and space for operators compared with other operation methods; (6) The design is exquisite and beautiful, and the installation is convenient, fast, cost-saving, and has strong applicability. It is strong and durable and can be recycled repeatedly; the convenient installation structure not only reduces the operation time and increases the installation efficiency, but also effectively reduces the occurrence of hand injuries or damage to equipment. While solving the problem, it is safe and efficient, and has high promotion value.

[0042] This device is designed using the essential anchor tensioner, anchor tensioner and other cylinders and piston thrusters required for the excavation working face, in conjunction with the push rod design device, to clamp the chain and tighten the chain. The device is designed to be 25cm high to provide working space for operators and reduce safety risks.

[0043] The design and processing plan is as follows: (1) The device is divided into two parts for processing; the processing and material acquisition are convenient and the cost is extremely low; (2) The device is processed and manufactured in the form of welding; (3) 10mm×10cm×6m flat steel is used and cut into 4cm and 6cm widths from the middle for use. Cut the 4cm flat steel into the following lengths: 1 125cm section, 4 35cm sections, and 1 15cm section for later use; cut the 2cm steel plate into 20cm×13cm and 15cm×15cm pieces; cut 3cm×18cm into two pieces, one end of which is cut into triangles; cut 3cm×15cm into one piece, one end is cut into triangles; cut Ф10cm steel pipes and Ф13cm steel pipes into 3cm lengths for later use (they can be cut according to the size of the anchor tensioner head); (4) cut the 6cm steel plate into 4 102cm long steel plates and 2 6cm long steel plates for later use; (5) The structure of the tensioning component is welded; (6) The remaining 3cm steel plate and 6cm steel plate are welded and fixed according to the structure of the first tensioning component, and 5 Ф1.5cm drill holes are drilled at the corresponding positions and sizes, and the chain and Ф16×100mm pin are welded at the same time; the 6cm steel plate is welded into a square frame, and a 98cm long gap is cut in the middle direction of the upper and lower sides as the slide of the right telescopic part; (7) After welding is completed, the left telescopic device is inserted into the right fixing device, and the corresponding baffle, sliding plate, and fixing pin are welded and fixed according to the effect diagram of the chain tightening device; (8) After welding is completed, the baffle is welded and reinforced; (9) After welding is completed, it is used for on-site standby.

[0044] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:

[0045] According to the utility model, a chain tightening device is provided, including a first tensioning component 10, a second tensioning component 20 and a driving component 30, the first tensioning component 10 has a first hook 11, the second tensioning component 20 is provided with a accommodating cavity 21, the accommodating cavity 21 extends along the length direction of the second tensioning component 20, the end of the first tensioning component 10 away from the first hook 11 is inserted into the accommodating cavity 21, the first tensioning component 10 is movably arranged along the extension direction of the accommodating cavity 21, and the end of the second tensioning component 20 away from the first tensioning component 10 has a second hook 22; the driving component 30 has a telescopic rod 31, the telescopic rod 31 is connected to the first tensioning component 10 and / or the second tensioning component 20, and the first tensioning component 10 and / or the second tensioning component 20 are driven to move by the telescopic rod 31. Such a configuration is not only simple to process, but also convenient to use. The telescopic rod 31 is used to drive the first tensioning component 10 and / or the second tensioning component 20, so that the first hook 11 of the first tensioning component 10 and / or the second hook 22 of the second tensioning component 20 are hooked together with the chain to form a pulling force, thereby achieving the purpose of tensioning the chain. The rigid telescopic rod 31 is used to make the tensioning force more stable, thereby improving the tensioning effect.

[0046] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A chain tightening device, characterized in that: include: A first tensioning component (10), wherein the first tensioning component (10) has a first hook (11); a second tensioning member (20), wherein the second tensioning member (20) is provided with a receiving cavity (21), the receiving cavity (21) extending along the length direction of the second tensioning member (20), an end of the first tensioning member (10) away from the first hook (11) being inserted into the receiving cavity (21), the first tensioning member (10) being movably arranged along the extending direction of the receiving cavity (21), and an end of the second tensioning member (20) away from the first tensioning member (10) having a second hook (22); A driving component (30), wherein the driving component (30) has a telescopic rod (31), wherein the telescopic rod (31) is connected to the first tensioning component (10) and / or the second tensioning component (20), and the first tensioning component (10) and / or the second tensioning component (20) are driven to move via the telescopic rod (31).

2. The chain tightening device according to claim 1, characterized in that: The second tensioning component (20) comprises a bearing end surface (23), the driving component (30) is arranged on the bearing end surface (23), and the bearing end surface (23) is also provided with an escape opening (230), the escape opening (230) is communicated with the accommodating cavity (21), and the escape opening (230) extends along the length direction of the second tensioning component (20); The chain tightening device also includes: A first baffle (40) is arranged at an end of the first tensioning component (10) away from the first hook (11), and the first baffle (40) extends from the accommodating cavity (21) through the avoidance opening (230); The second baffle (50) is arranged at one end of the second tensioning component (20) away from the second hook (22), and the telescopic rod (31) is connected to the first baffle (40) or the second baffle (50).

3. The chain tightening device according to claim 2, characterized in that: The telescopic rod (31) is connected to the second baffle (50); the chain tightening device further comprises: A first card slot (51) is provided on the second baffle (50), and at least a portion of the telescopic rod (31) is inserted into the first card slot (51).

4. The chain tightening device according to claim 1, characterized in that: The chain tightening device also includes: A slide groove (24) is arranged on the bottom surface of the accommodating cavity (21), and the slide groove (24) extends along the length direction of the second tensioning component (20); A slide bar (12) is arranged on the bottom surface of the first tensioning component (10), and the slide bar (12) extends along the length direction of the first tensioning component (10). At least a portion of the slide bar (12) is arranged in the slide groove (24) and slidably cooperates with the slide groove (24).

5. The chain tightening device according to claim 1, characterized in that: A guide opening is provided on the bottom surface of the second tensioning component (20), and the guide opening is communicated with the accommodating cavity (21); the chain tightening device further comprises: The inserting plate (13) is arranged on the bottom surface of the first tensioning component (10), and at least a part of the inserting plate (13) is inserted into the guide opening and is gap-matched with the guide opening.

6. The chain tightening device according to claim 5, characterized in that: The chain tightening device also includes: A sliding plate (14) is arranged on one end of the plug plate (13) away from the first tensioning component (10), and a fitting end surface (140) is provided on the sliding plate (14), and at least a part of the fitting end surface (140) fits with the body of the second tensioning component (20) that encloses the guide opening.

7. The chain tightening device according to claim 1, characterized in that: The first tensioning component (10) comprises: a first tensioning body (15), at least a portion of which is inserted into the accommodating cavity (21); The second tensioning body (16) is connected to the first tensioning body (15), and a first angle is formed between the first tensioning body (15) and the second tensioning body (16), wherein the first angle is an obtuse angle, and the first hook (11) is arranged at an end of the second tensioning body (16) away from the first tensioning body (15).

8. The chain tightening device according to claim 7, characterized in that: There are at least two second tensioning bodies (16), at least two of the second tensioning bodies (16) are respectively connected to the first tensioning body (15), and a second angle is formed between two adjacent second tensioning bodies (16), and the second angle is an acute angle; Each of the second tensioning bodies (16) is provided with a first hook (11) at one end away from the first tensioning body (15).

9. The chain tightening device according to claim 1, characterized in that: The second tensioning component (20) comprises: A third tensioning body (26), wherein the accommodating cavity (21) is arranged in the third tensioning body (26); The fourth tensioning body (27) is connected to the third tensioning body (26), and a third angle is formed between the fourth tensioning body (27) and the third tensioning body (26), wherein the third angle is an obtuse angle, and the second hook (22) is arranged at an end of the fourth tensioning body (27) away from the third tensioning body (26).

10. The chain tightening device according to claim 9, characterized in that: There are at least two fourth tensioning bodies (27), at least two of the fourth tensioning bodies (27) are respectively connected to the third tensioning body (26), and a fourth angle is formed between two adjacent fourth tensioning bodies (27), and the fourth angle is an acute angle; Each of the fourth tensioning bodies (27) is provided with a second hook (22) at one end away from the third tensioning body (26).

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