CN217894113U

CN217894113U - Tensioning device and scraper conveyor with same

Info

Publication number: CN217894113U
Application number: CN202222096097.3U
Authority: CN
Inventors: 田宝雄; 张丽芳; 王亚军; 张建萍; 周建峰; 张国雄; 李桐坡; 白富强; 闫建民; 刘煊; 王东; 王斌
Original assignee: Shendong Coal Branch of China Shenhua Energy Co Ltd; Guoneng Shendong Coal Group Co Ltd
Current assignee: Shendong Coal Branch of China Shenhua Energy Co Ltd; Guoneng Shendong Coal Group Co Ltd
Priority date: 2022-08-09
Filing date: 2022-08-09
Publication date: 2022-11-25
Anticipated expiration: 2032-08-09

Abstract

The utility model provides a overspeed device tensioner and have its scrape trigger, overspeed device tensioner includes: the mounting assembly is slidably mounted on the frame and used for mounting a first driving wheel and/or a second driving wheel of the scraper machine, and a driving chain of the scraper machine is wound on the first driving wheel and the second driving wheel so as to enable the driving chain to be provided with a first chain section and a second chain section which are positioned between the first driving wheel and the second driving wheel, and the distribution direction of the first chain section and the second chain section is perpendicular to the distribution direction of the first driving wheel and the second driving wheel; the buffer structure comprises a fixing component and an elastic component, the fixing component is fixedly arranged on the frame, one end of the elastic component is connected with the mounting component, and the other end of the elastic component is connected with the fixing component; wherein the cushion structure is located between the first chain strand and the second chain strand. The utility model provides a scrape the problem that the elasticity degree of the drive chain of trigger and conveyer belt is difficult to the adjustment among the prior art.

Description

Tensioning device and scraper conveyor with same

Technical Field

The utility model relates to a scraper blade technical field of coal factory particularly, relates to a overspeed device tensioner and have its scraper blade.

Background

The scraper is the main transportation mechanical equipment used in coal preparation plant, and is mainly used for continuous transportation or transfer of coal in coal preparation plant.

Scrape the conveyer belt on the trigger and follow the chain for a long time and carry out the transmission, at present, the chain elasticity degree needs manual regulation of people, is usually that the manual work carries out the thread tightening, and this needs to consume a large amount of manpowers, influences the production progress simultaneously.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at provides a overspeed device tensioner and have its scrape trigger to solve the problem that the elasticity degree of the drive chain of scraping the trigger among the prior art and conveyer belt is difficult to the adjustment.

In order to achieve the above object, according to an aspect of the present invention, there is provided a tensioning device for mounting on a frame of a scraper, the tensioning device comprising: the mounting assembly is slidably mounted on the frame and used for mounting a first driving wheel and/or a second driving wheel of the scraper conveyor, and a driving chain of the scraper conveyor is wound on the first driving wheel and the second driving wheel so as to enable the driving chain to be provided with a first chain section and a second chain section which are positioned between the first driving wheel and the second driving wheel, and the distribution direction of the first chain section and the second chain section is perpendicular to the distribution direction of the first driving wheel and the second driving wheel; the buffer structure comprises a fixing component and an elastic component, the fixing component is fixedly arranged on the frame, one end of the elastic component is connected with the mounting component, and the other end of the elastic component is connected with the fixing component; wherein the cushion structure is located between the first chain strand and the second chain strand.

Furthermore, the fixing assembly comprises a fixing plate, the mounting assembly comprises a mounting part, the mounting part comprises a mounting plate and a sliding part which are mutually connected, the sliding part is slidably connected with the framework, the mounting plate is arranged opposite to the fixing plate, and two ends of the elastic part are respectively connected with the mounting plate and the fixing plate; the fixing plate is long, the elastic components are multiple, and the elastic components are arranged at intervals along the length direction of the fixing plate.

Furthermore, the fixing assembly further comprises a limiting arm, the limiting arm is connected with the fixing plate and located on one side, close to the mounting part, of the fixing plate, and a buffering pad is arranged at one end, close to the mounting part, of the limiting arm.

Further, the fixing assembly comprises a first connecting part and a fixing part which are connected with each other, and the fixing part is fixedly connected with the frame; the mounting assembly comprises a second connecting part and a mounting part which are connected with each other, the mounting part is slidably mounted on the frame, and the mounting part is used for mounting the first driving wheel; wherein the first connecting part is connected with the second connecting part in an adjustable position; one end of the elastic component is connected with the first connecting component, and the other end of the elastic component is connected with the second connecting component.

Further, one of the first connecting part and the second connecting part is a sleeve structure, and the other of the first connecting part and the second connecting part is a rod-shaped structure which is telescopically arranged in the sleeve structure; wherein, the elastic component is located the cavity of sleeve structure.

Further, the rod-shaped structure comprises a first rod section and a second rod section, wherein the outer perimeter of the first rod section is larger than that of the second rod section, so that a limit step is formed between the first rod section and the second rod section; the sleeve structure is provided with a first wall surface and a second wall surface which are arranged oppositely, the first wall surface is provided with an inserting opening for the insertion of the rod-shaped structure, and the outer circumference of the inserting opening is smaller than that of the first wall surface so as to form a limiting wall surface; the first rod section is positioned in the cavity of the sleeve structure so that the limiting step is in limiting fit with the limiting wall surface; one end of the elastic component is connected with the rod-shaped structure, and the other end of the elastic component is connected with the first wall surface.

Furthermore, the tensioning device also comprises a rolling component, a groove part is arranged on the peripheral surface of the first rod section, and the rolling component is placed in the groove part so as to enable the rolling component to be positioned between the groove part and the sleeve structure; the rolling component is a cylindrical component or a spherical component, and the shape and the size of the groove portion are matched with those of the rolling component.

Furthermore, the first connecting parts, the second connecting parts and the elastic parts are all multiple, the multiple first connecting parts and the multiple second connecting parts are arranged in a one-to-one correspondence manner, and the multiple elastic parts and the multiple first connecting parts are arranged in a one-to-one correspondence manner; the fixed part includes the fixed plate, and the fixed plate is rectangular form, and first connecting component is connected with the fixed plate, and the length direction interval of a plurality of first connecting components along the fixed plate sets up.

Further, the fixed part still includes spacing arm, and spacing arm is located the fixed plate and is close to one side of installing the part, and spacing arm and fixed plate interconnect and be predetermined contained angle setting, and spacing arm and first connecting part interval set up, and the one end that spacing arm is close to the installing the part is provided with the blotter.

Furthermore, a plurality of limiting arms are arranged, and each limiting arm and the plurality of elastic parts are arranged in a staggered mode; or the number of the limiting arms is two, the two limiting arms and the fixing plate form a U-shaped structure, and each elastic part is located in a cavity defined by the U-shaped structure.

According to another aspect of the utility model, a scrape trigger is provided, include: the above-described tensioner; the conveying belt is connected with the transmission chain and is positioned on the outer side of the transmission chain; the tensioning device comprises a first driving wheel and a second driving wheel, a driving chain is wound on the first driving wheel and the second driving wheel, the first driving wheel and the second driving wheel are arranged at intervals along the movement direction of the driving chain, and the tensioning device is arranged on the first driving wheel and/or the second driving wheel.

By applying the technical scheme of the utility model, the utility model discloses a overspeed device tensioner includes installation component and buffer structure, and installation component slidable ground installs on the frame of scraping the trigger, and the installation component is used for installing the first drive wheel and/or the second drive wheel of scraping the trigger, and the drive chain of scraping the trigger is around establishing on first drive wheel and second drive wheel to make drive chain have the first chain section and the second chain section that are located between first drive wheel and the second drive wheel, and the distribution direction of first chain section and second chain section is perpendicular to the distribution direction of first drive wheel and second drive wheel; the buffer structure comprises a fixed assembly and an elastic component, the fixed assembly is fixedly arranged on the frame, one end of the elastic component is connected with the mounting assembly, and the other end of the elastic component is connected with the fixed assembly, so that in the moving process of a transmission chain of the scraper conveyor, the transmission chain can drive the mounting assembly to move relative to the fixed assembly 30 so as to compress or stretch the elastic component, and a force opposite to the moving direction of the transmission chain can be applied to the mounting assembly through the elastic force action of the elastic component so as to tension the mounting assembly to pull the transmission chain and prevent the transmission chain from loosening; wherein the cushion structure is located between the first chain strand and the second chain strand.

Drawings

The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the scope of the invention. In the drawings:

fig. 1 shows a schematic partial structural view of an embodiment of a scraper according to the invention;

figure 2 shows a schematic overall structural view of an embodiment of a tensioner according to the present invention;

fig. 3 shows a schematic view of an embodiment of a tensioning device according to the invention with a resilient member mounted between the first and second connecting members;

fig. 4 shows an enlarged schematic view of the region a of the tensioning device according to fig. 3.

Wherein the figures include the following reference numerals:

10. a frame; 20. mounting the component; 100. a first drive pulley; 3. a buffer structure; 30. a fixing assembly; 300. an elastic member; 311. a fixing plate; 21. a mounting member; 312. a limiting arm; 313. a cushion pad; 314. a reinforcing plate; 32. a first connecting member; 31. a fixing member; 22. a second connecting member; 21. a mounting member; 221. a first pole segment; 222. a second pole segment; 321. a first wall surface; 322. a second wall surface; 220. a limiting step; 320. a limiting wall surface; 223. a rolling member; 2210. a groove part; 211. mounting a plate; 212. a sliding member; 2121. a connecting plate; 2122. a sliding plate; 2120. a chute; 213. a drive shaft; 323. and inserting the opening.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Referring to fig. 1 to 4, the present invention provides a tensioning device for mounting on a frame 10 of a scraper, the tensioning device comprising: a mounting assembly 20, the mounting assembly 20 being slidably mounted on the frame 10, the mounting assembly 20 being configured to mount a first driving wheel 100 and/or a second driving wheel of the scraper conveyor, a driving chain of the scraper conveyor being wound around the first driving wheel 100 and the second driving wheel, so that the driving chain has a first chain segment and a second chain segment along a direction between the first driving wheel 100 and the second driving wheel, the first chain segment and the second chain segment being distributed in a direction perpendicular to a distribution direction of the first driving wheel 100 and the second driving wheel; the buffer structure 3 comprises a fixed assembly 30 and an elastic component 300, wherein the fixed assembly 30 is fixedly arranged on the frame 10, one end of the elastic component 300 is connected with the mounting assembly 20, and the other end of the elastic component 300 is connected with the fixed assembly 30; wherein the cushioning structure 3 is located between the first chain strand and the second chain strand.

The utility model discloses a overspeed device tensioner includes installation component 20 and buffer structure 3, installation component 20 slidable mounting is on the frame 10 of scraper blade machine, installation component 20 slidable mounting is on frame 10, installation component 20 is used for installing scraper blade machine's first drive wheel 100 and/or second drive wheel, the drive chain of scraper blade machine is around establishing on first drive wheel 100 and second drive wheel, so that drive chain has along first chain section and the second chain section that is located between first drive wheel 100 and the second drive wheel, the distribution direction of first chain section and second chain section is perpendicular to the distribution direction of first drive wheel 100 and second drive wheel; the buffer structure 3 comprises a fixing component 30 and an elastic component 300, the fixing component 30 is fixedly installed on the frame 10, one end of the elastic component 300 is connected with the installation component 20, and the other end of the elastic component 300 is connected with the fixing component 30, so that in the process of the movement of the transmission chain of the scraper machine, the transmission chain can drive the installation component 20 to move relative to the fixing component 30 so as to compress or stretch the elastic component 300, and a force opposite to the movement direction of the transmission chain can be applied to the installation component 20 through the elastic force action of the elastic component 300 so as to tension the installation component 20 and further pull the transmission chain, so that the transmission chain is prevented from loosening; wherein the cushioning structure 3 is located between the first chain strand and the second chain strand.

In the embodiment of the present invention, the elastic member 300 is a strong spring.

In the first embodiment of the present invention, the fixing assembly 30 includes a fixing plate 311, the mounting assembly 20 includes a mounting part 21, the mounting part 21 includes a mounting plate 211 and a sliding part 212 connected to each other, the sliding part 212 is slidably connected to the frame 10, the mounting plate 211 is opposite to the fixing plate 311, and two ends of the elastic part 300 are respectively connected to the mounting plate 211 and the fixing plate 311; the fixing plate 311 is long, the plurality of elastic members 300 are arranged, and the plurality of elastic members 300 are arranged at intervals along the length direction of the fixing plate 311, so that the transmission chain is better tensioned under the combined action of the plurality of elastic members 300.

Preferably, the fixing assembly 30 further includes a limiting arm 312, the limiting arm 312 is connected to the fixing plate 311 and located on one side of the fixing plate 311 close to the mounting part 21, a buffer pad 313 is disposed at one end of the limiting arm 312 close to the mounting part 21, so that, at the moment of starting the scraper machine, the degree of compression of the elastic component 300 is greater, the displacement degree of the mounting assembly 20 is greater, at this moment, the buffer pad 313 on the limiting arm 312 abuts against the mounting plate 211, the impact force caused at the moment of starting the scraper machine can be buffered through the buffer effect of the buffer pad 313, and the elastic component 300 can be protected at the same time, so as to prevent the elastic component 300 from being large in compression degree and elastic failure, improve the service life of the elastic component 300, and prevent the transmission chain from being loosened when the displacement distance of the mounting assembly 20 is greater.

In the second embodiment of the present invention, the fixing assembly 30 includes a first connecting part 32 and a fixing part 31 connected to each other, and the fixing part 31 is fixedly connected to the frame 10; the mounting assembly 20 includes a second connecting member 22 and a mounting member 21 connected to each other, the mounting member 21 being slidably mounted on the frame 10, the mounting member 21 being used to mount the first driving wheel 100; wherein the first connecting part 32 is connected to the second connecting part 22 in a position-adjustable manner; one end of the elastic member 300 is connected to the first connection member 32, and the other end of the elastic member 300 is connected to the second connection member 22.

Specifically, one of the first and

second connection parts

32 and 22 is a sleeve structure, and the other of the first and

second connection parts

32 and 22 is a rod-like structure telescopically inserted in the sleeve structure; wherein the resilient member 300 is located within the cavity of the sleeve structure. Thus, the elastic member 300 can be prevented from being exposed to the air by the first and

second connection parts

32 and 22, the elastic member 300 is further protected, and the structural strength of the tensioner is improved.

Specifically, the rod-like structure comprises a first rod section 221 and a second rod section 222, the outer circumference of the first rod section 221 being larger than the outer circumference of the second rod section 222, such that a limit step 220 is formed between the first rod section 221 and the second rod section 222; the sleeve structure is provided with a first wall surface 321 and a second wall surface 322 which are oppositely arranged, the first wall surface 321 is provided with an inserting opening 323 for inserting the rod-shaped structure, and the outer circumference of the inserting opening 323 is smaller than that of the first wall surface 321 so as to form a limiting wall surface 320; the first rod section 221 is positioned in the cavity of the sleeve structure, so that the limiting step 220 is in limiting fit with the limiting wall surface 320 to prevent the rod-shaped structure from falling out of the sleeve structure; one end of the elastic member 300 is connected to the rod-shaped structure, and the other end of the elastic member 300 is connected to the first wall 321.

Preferably, the tensioner further comprises rolling members 223, the outer circumferential surface of the first rod segment 221 being provided with a groove portion 2210, the rolling members 223 being placed within the groove portion 2210 such that the rolling members 223 are located between the groove portion 2210 and the sleeve structure; the rolling members 223 are cylindrical or spherical members, and the groove 2210 is formed in a shape and size corresponding to the shape and size of the rolling members 223. In this way, the friction forces during the movement of the first pole segment 221 relative to the sleeve structure can be reduced by the rolling elements 223.

In particular, the cross-section of the rod-like structure is circular.

Specifically, the rolling members 223 and the groove portions 2210 are plural, and the plural rolling members 223 and the plural groove portions 2210 are provided in one-to-one correspondence; wherein a plurality of groove portions 2210 are arranged at intervals in the moving direction of the rod-like member; alternatively, a plurality of groove portions 2210 are spaced around the circumference of the first rod segment 221.

Specifically, the first connection part 32, the second connection part 22, and the elastic part 300 are all plural, the plural first connection parts 32 and the plural second connection parts 22 are provided in one-to-one correspondence, and the plural elastic parts 300 are provided in one-to-one correspondence with the plural first connection parts 32; the fixing member 31 includes a fixing plate 311, the fixing plate 311 has a long shape, the first coupling member 32 is coupled to the fixing plate 311, and the plurality of first coupling members 32 are spaced apart from each other in a longitudinal direction of the fixing plate 311.

In the embodiment of the present invention, the number of the first connecting part, the second connecting part, and the elastic part is 4.

Specifically, the fixing part 31 further includes a limiting arm 312, the limiting arm 312 is located on one side of the fixing plate 311 close to the mounting part 21, the limiting arm 312 and the fixing plate 311 are connected to each other and arranged at a predetermined included angle, the limiting arm 312 and the first connecting part 32 are arranged at an interval, and one end of the limiting arm 312 close to the mounting part 21 is provided with a cushion 313.

Specifically, the fixing plate 311 is a rectangular plate, the fixing member 31 further includes a reinforcing plate 314, the reinforcing plate 314 is connected to the fixing plate 311, the reinforcing plate 314 and the fixing plate 311 are disposed at a predetermined included angle, and both the reinforcing plate 314 and the fixing plate 311 are connected to the frame 10, so as to reinforce the structural strength of the tensioning device through the reinforcing plate 314; the extending direction of the reinforcing plate 314 is the same as the extending direction of the fixing plate 311.

Alternatively, the reinforcing plate 314 is plural, and the plural reinforcing plates 314 are disposed at intervals in the width direction of the fixing plate 311 to reinforce the structural strength of the tensioner by the reinforcing plates 314.

Optionally, there are a plurality of limiting arms 312, and each limiting arm 312 is staggered with a plurality of elastic members 300; or, two limiting arms 312 are provided, the two limiting arms 312 and the fixing plate 311 form a U-shaped structure, and each elastic component 300 is located in a cavity surrounded by the U-shaped structure. Wherein, each limit arm 312 is provided with a cushion 313.

Specifically, the mounting part 21 further includes two transmission shafts 213, the two sliding parts 212 are slidably disposed on the frame 10, the two sliding parts 212 are respectively mounted at two ends of the transmission shaft 213 along the length direction thereof, the transmission shaft 213 is connected to both of the two sliding parts 212, the transmission shaft 213 is located between the two sliding parts 212, and the first transmission wheel 100 is sleeved on the transmission shaft 213; wherein the buffer structure 3 is located on the side of the mounting plate 211 away from the sliding part 212.

Optionally, the first drive wheel 100 is a gear or a pulley or a sprocket.

Specifically, the sliding member 212 includes a connecting plate 2121 and two oppositely disposed sliding plates 2122, the connecting plate 2121 is located between the two sliding plates 2122 and connected to both of the two sliding plates 2122 to form an i-shaped structure, and the two sliding plates 2122 are spaced apart to form a sliding slot 2120 for being slidably mounted on the frame 10 via the sliding slot 2120.

The utility model also provides a scrape trigger, include: the above-described tensioner; the conveying belt is connected with the transmission chain and is positioned on the outer side of the transmission chain; the device comprises a first driving wheel 100 and a second driving wheel, wherein a driving chain is wound on the first driving wheel 100 and the second driving wheel, the first driving wheel 100 and the second driving wheel are arranged at intervals along the movement direction of the driving chain, and a tensioning device is arranged on the first driving wheel 100 and/or the second driving wheel; wherein, the scrapers of the scraper are all arranged on the conveying belt between the first driving wheel 100 and the second driving wheel.

From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects:

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A tensioning device for mounting on the frame (10) of a scraper machine, characterized in that it comprises:

the mounting assembly (20) is slidably mounted on the frame (10), the mounting assembly (20) is used for mounting a first driving wheel (100) and/or a second driving wheel of the scraper conveyor, and a driving chain of the scraper conveyor is wound on the first driving wheel (100) and the second driving wheel so as to enable the driving chain to have a first chain section and a second chain section which are positioned between the first driving wheel (100) and the second driving wheel, and the distribution direction of the first chain section and the second chain section is perpendicular to the distribution direction of the first driving wheel (100) and the second driving wheel;

the buffer structure (3) comprises a fixing component (30) and an elastic component (300), the fixing component (30) is fixedly installed on the frame (10), one end of the elastic component (300) is connected with the installation component (20), and the other end of the elastic component (300) is connected with the fixing component (30); wherein the buffer structure (3) is located between the first chain strand and the second chain strand.

2. The tensioner as in claim 1,

the fixing assembly (30) comprises a fixing plate (311), the mounting assembly (20) comprises a mounting part (21), the mounting part (21) comprises a mounting plate (211) and a sliding part (212) which are connected with each other, the sliding part (212) is slidably connected with the frame (10), the mounting plate (211) is arranged opposite to the fixing plate (311), and two ends of the elastic part (300) are respectively connected with the mounting plate (211) and the fixing plate (311);

the fixing plate (311) is long, the number of the elastic components (300) is multiple, and the elastic components (300) are arranged at intervals along the length direction of the fixing plate (311).

3. The tensioner of claim 2, wherein the fixing assembly (30) further comprises a stopper arm (312), the stopper arm (312) is connected to the fixing plate (311) and is located on a side of the fixing plate (311) close to the mounting part (21), and a cushion (313) is provided at an end of the stopper arm (312) close to the mounting part (21).

4. The tensioner as in claim 1,

the fixing component (30) comprises a first connecting part (32) and a fixing part (31) which are connected with each other, and the fixing part (31) is fixedly connected with the frame (10);

the mounting assembly (20) comprises a second connecting part (22) and a mounting part (21) which are connected with each other, the mounting part (21) is slidably mounted on the frame (10), and the mounting part (21) is used for mounting the first driving wheel (100);

wherein the first connecting part (32) is connected to the second connecting part (22) in a position-adjustable manner; one end of the elastic member (300) is connected to the first connection member (32), and the other end of the elastic member (300) is connected to the second connection member (22).

5. The tensioner as in claim 4,

one of the first and second connecting parts (32, 22) is a sleeve structure and the other of the first and second connecting parts (32, 22) is a rod structure telescopically arranged in the sleeve structure;

wherein the resilient member (300) is located within a cavity of the sleeve structure.

6. The tensioner as in claim 5,

the rod-like structure comprises a first rod segment (221) and a second rod segment (222), the outer perimeter of the first rod segment (221) is larger than the outer perimeter of the second rod segment (222), so that a limit step (220) is formed between the first rod segment (221) and the second rod segment (222);

the sleeve structure is provided with a first wall surface (321) and a second wall surface (322) which are arranged oppositely, the first wall surface (321) is provided with an inserting opening (323) for inserting the rod-shaped structure, and the outer circumference of the inserting opening (323) is smaller than that of the first wall surface (321) to form a limiting wall surface (320); the first rod section (221) is positioned in the cavity of the sleeve structure, so that the limiting step (220) is in limiting fit with the limiting wall surface (320); wherein one end of the elastic member (300) is connected to the rod-shaped structure, and the other end of the elastic member (300) is connected to the first wall surface (321).

7. A tensioner according to claim 6, characterized in that the tensioner further comprises rolling means (223), a groove portion (2210) being provided on the outer circumferential surface of the first rod segment (221), the rolling means (223) being placed in the groove portion (2210) such that the rolling means (223) is located between the groove portion (2210) and the sleeve structure;

wherein the rolling member (223) is a cylindrical member or a spherical member, and the groove portion (2210) has a shape and size adapted to those of the rolling member (223).

8. The tensioner of claim 4,

the number of the first connecting parts (32), the number of the second connecting parts (22), and the number of the elastic parts (300) are plural, the plural first connecting parts (32) and the plural second connecting parts (22) are provided in one-to-one correspondence, and the plural elastic parts (300) and the plural first connecting parts (32) are provided in one-to-one correspondence;

the fixing part (31) comprises a fixing plate (311), the fixing plate (311) is long, the first connecting part (32) is connected with the fixing plate (311), and the first connecting parts (32) are arranged at intervals along the length direction of the fixing plate (311).

9. A tensioner according to claim 8, characterised in that said fixing element (31) further comprises a retaining arm (312), said retaining arm (312) being located on a side of said fixing plate (311) adjacent to said mounting element (21), said retaining arm (312) being interconnected to said fixing plate (311) and being disposed at a predetermined angle, said retaining arm (312) being spaced from said first connecting element (32), and a cushion (313) being disposed at an end of said retaining arm (312) adjacent to said mounting element (21).

10. The tensioner of claim 3 or 9,

the number of the limiting arms (312) is multiple, and each limiting arm (312) and the elastic parts (300) are arranged in a staggered mode; or,

the number of the limiting arms (312) is two, the two limiting arms (312) and the fixing plate (311) form a U-shaped structure, and each elastic part (300) is located in a cavity defined by the U-shaped structure.

11. A scraper machine, characterized in that it comprises:

the tensioning device of any one of claims 1 to 10;

the conveying belt is connected with the transmission chain and is positioned on the outer side of the transmission chain;

the transmission chain is wound on the first transmission wheel (100) and the second transmission wheel, the first transmission wheel (100) and the second transmission wheel are arranged at intervals along the motion direction of the transmission chain, and the tensioning device is arranged on the first transmission wheel (100) and/or the second transmission wheel.