Scraper tensioning mechanism

Abstract

The tensioning mechanism is used for adjusting the tensioning degree of a chain of the scraper and comprises a tensioning support and a tensioning assembly, the tensioning assembly is sleeved with the chain, the tensioning support is arranged on a groove body at the tail end of the scraper, the two sides of the tensioning support are further provided with a first tensioning mechanism body and a second tensioning mechanism body respectively, and the first tensioning mechanism body and the second tensioning mechanism body are arranged on the tensioning support. A receding groove is formed in the tensioning support, the tensioning assembly penetrates through the receding groove to be connected with the first tensioning mechanism, the first tensioning mechanism is used for supporting the tensioning assembly to pre-tension the tensioning assembly, and the second tensioning mechanism independently tensions the corresponding chains. The second tensioning mechanism and the first tensioning mechanism are matched with each other so as to ensure that the chains can be in a tensioning state in the working process.

Description

Technical Field

[0001] The present application relates to the technical field of scraper machines, and in particular to a tensioning mechanism for a scraper machine. Background Art

[0002] The scraper conveyor uses two chains to drive the scrapers on it to move and scrape out the materials. As the use time increases, the chain of the scraper conveyor is continuously subjected to stress during use. At the same time, accompanied by high temperature environment and wear, the chain will elongate to varying degrees, which will cause fixture wear and shorten its service life. At the same time, the chain elongation will increase the probability of chain falling and increase the risk of chain breaking. Therefore, the chain needs to be tensioned.

[0003] Patent No. 202223440970.2 discloses an automatic chain tensioning device for a ring-chain water-sealed scraper slag picker, including a tensioning screw rod, which is installed on a tensioning device frame; the left and right ends of the slag picker tail shaft assembly freely pass through the tensioning screw rod and are slidably set on the guide slide rails of the tensioning device frame; the tensioning screw rod is located on the inner side of the slag picker tail shaft assembly and is successively covered with a tensioning spring and a lower support slider, and the outer side of the lower support slider is limited by a locking nut; this structure can synchronously tension the two chains when in use, but in actual use, the two chains will appear different degrees of elongation due to wear and environmental influences, and the existing tensioning structure will result in one chain being over-tightened and the other chain still in a relaxed state, making it difficult to ensure that both chains can be reasonably tensioned. Utility Model Content

[0004] The present application provides a scraper tensioning mechanism to solve the problem in the prior art that reasonable tensioning force cannot be applied to the two chains, and adopts the following technical solutions:

[0005] The scraper conveyor tensioning mechanism is used to adjust the tension of the scraper conveyor chain, and includes a tensioning bracket and a tensioning assembly. The chain is sleeved on the tensioning assembly, and the tensioning bracket is arranged on the trough body at the tail end of the scraper conveyor. A first tensioning mechanism and a second tensioning mechanism are respectively provided on both sides of the tensioning bracket. A yield groove is provided on the tensioning bracket, and the tensioning assembly is connected to the first tensioning mechanism through the yield groove. The first tensioning mechanism is used to support the tensioning assembly to pre-tension the tensioning assembly, and the second tensioning mechanism independently tensions the corresponding chains.

[0006] Preferably, the first tensioning mechanism comprises a guide rod and an elastic component 1, the guide rod is arranged on the tensioning bracket, the elastic component 1 is arranged on the guide rod, and two ends of the elastic component 1 are respectively abutted against the tensioning assembly and the tensioning bracket.

[0007] Preferably, the second tensioning mechanism includes a swing arm and an adjustment block, and an adjustment component that pushes the adjustment block to drive the swing arm. One end of the swing arm is rotatably connected to the tensioning assembly, and an adjustment wheel is provided on the movable end of the swing arm.

[0008] Further preferably, the adjustment component includes a movable rod and two elastic components, and an adjustment component screwed on the movable rod, one end of the movable rod is connected to the tensioning assembly, the adjustment block is sleeved on the movable rod, and the two elastic components are sleeved on the movable rod, with both ends respectively abutting the adjustment block and the adjustment component.

[0009] Further preferably, the adjusting block is provided with a lever, the swing arm is provided with a limiting groove, and the lever slides along the limiting groove to drive the swing arm to swing.

[0010] Preferably, it further comprises a driving device, and the driving devices corresponding to the tensioning assembly are respectively provided on both sides of the tensioning bracket.

[0011] Preferably, the tensioning assembly includes a rotating shaft and a support seat, the rotating shaft is provided with a tensioning wheel, the support seats are respectively provided at both ends of the rotating shaft, the support seats are rotatably connected to the rotating shaft, and the support seats are arranged on the first tensioning mechanism.

[0012] The beneficial effects of this application compared to the prior art are:

[0013] (1) The chain is pre-tensioned by a first tensioning mechanism, and a second tensioning mechanism is provided to cooperate with the first tensioning mechanism to tension the chain independently. When the equipment is working, it can automatically compensate according to the elongation of each chain to prevent some chains from being over-tensioned and the remaining chains from being under-tensioned, thereby ensuring that each chain is always in a tensioned state.

[0014] (2) Both the first tensioning mechanism and the second tensioning mechanism are tensioned by elastic components. When the scraper conveyor has an excessively large load, the elastic components can protect the chain and reduce the impact force generated during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a front view of the present application;

[0016] Figure 2 It is a right view of the present application;

[0017] Figure 3 This application Figure 2 sectional view of .

[0018] In the figure:

[0019] 1. Tension bracket;

[0020] 2. Tensioning assembly, 21. Support base, 22. Tensioning wheel, 23. Rotating shaft;

[0021] 3. First tensioning mechanism, 31. Guide rod, 32. First elastic component;

[0022] 4. Second tensioning mechanism, 40. Adjusting assembly, 401. Movable rod, 402. Second elastic component, 403. Adjusting component, 41. Swing arm, 410. Limiting groove, 42. Adjusting block, 420. Pushing rod, 43. Adjusting wheel;

[0023] 5. Relief groove. Specific implementation manner

[0024] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the drawings of the present application. Obviously, the described embodiments of the present application are only some embodiments of the present application, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0025] Refer to Figures 1 to 3 , for further description of the present application, the tensioning mechanism of the scraper conveyor includes a tensioning bracket 1 provided at the tail end of the scraper conveyor trough body, and a tensioning assembly 2 provided between the tensioning brackets 1. A chain is sleeved on the tensioning assembly 2. In this embodiment, there are 2 chains. Among them, the tensioning bracket 1 includes convex plates located on both sides of the tensioning bracket 1.

[0026] Combined with Figure 1 and Figure 2 , a first tensioning mechanism 3 and a second tensioning mechanism 4 are respectively provided on both sides of the tensioning bracket 1, and the first tensioning mechanism 3 and the second tensioning mechanism 4 on both sides of the tensioning bracket 1 have the same structure; a relief groove 5 is also provided on the tensioning bracket 1, and the tensioning assembly 2 passes through the relief groove 5 and is connected to the first tensioning mechanism 3. Among them, the first tensioning mechanism 3 is used to support the tensioning assembly 2 and pre-tension the tensioning assembly 2, and the second tensioning mechanism 4 is used to respectively tension the chains; the first tensioning mechanism 3 first tensions the tensioning assembly 2, and then the second tensioning mechanism 4 respectively tensions the chains to compensate for the elongation of each chain, preventing the chains from having different lengths due to the working environment or wear during operation, and enabling the chains to be in a tensioned state.

[0027] Combined with Figure 2, wherein, the tensioning assembly 2 includes a rotating shaft 23 and a support base 21. A tensioning wheel 22 is provided on the rotating shaft 23, and the chain is sleeved on the tensioning wheel 22. The support bases 21 are respectively provided at both ends of the rotating shaft 23. The support base 21 is rotatably connected to the rotating shaft 23 for supporting the rotation of the rotating shaft 23. The support base 21 is provided on the first tensioning mechanism 3. In this embodiment, the support base 21 and the rotating shaft 23 can be rotatably connected by providing a bushing or a bearing.

[0028] Combined with Figure 1 , the first tensioning mechanism 3 is used to pre-tension the tensioning assembly 2, so as to tension the chain sleeved on the tensioning assembly 2; the first tensioning mechanism 3 includes a guide rod 31 and a first elastic member 32. The guide rod 31 is provided on the tensioning bracket 1, and the first elastic member 32 is sleeved on the guide rod 31. Both ends of the first elastic member 32 are respectively abutted against the tensioning assembly 2 and the tensioning bracket 1. In this embodiment, there are 2 guide rods; specifically, the support base 21 is slidably connected to the guide rod 31, so as to ensure that the tensioning assembly 2 does not tilt. The first elastic member 32 is provided between the support base 21 and the tensioning bracket 1. Among them, the first elastic member 32 can be a spring; during use, the first elastic member 32 is in a compressed state, and the first elastic member 32 pushes the tensioning assembly 2 to move ( Figure 1 upward in this case), so as to pre-tension the chain.

[0029] In order to prevent the two chains from elongating to different degrees due to wear or working environment when the scraper conveyor is working; combined with Figure 2 , a second tensioning mechanism 4 is provided on the tensioning bracket 1. The second tensioning mechanism 4 is used to respectively tension the chains. When the lengths of the chains are inconsistent, the second tensioning mechanism 4 can compensate for the chains to keep the chains in a tensioned state; specifically, the second tensioning mechanism 4 includes a swing arm 41 and an adjusting block 42, and an adjusting assembly 40 for driving the adjusting block 42 to drive the swing arm 41 to swing. One end of the swing arm 41 is rotatably connected to the tensioning assembly 2, and an adjusting wheel 43 is provided at the movable end of the swing arm 41. The adjusting wheel 43 can be rotatably connected to the swing arm 41; a limiting groove 410 is provided on the swing arm 41, and a dial rod 420 matching the limiting groove 410 is provided on the adjusting block 42. The dial rod 420 is provided in the limiting groove 410, and the dial rod 420 can slide along the limiting groove 410 to push the swing arm 41 to swing; during work, the adjusting assembly 40 drives the swing arm 41 to swing, the swing arm 41 drives the adjusting wheel 43 to move outward, and the adjusting wheel 43 pushes the chain to move outward ( Figure 3It moves left and right (in the horizontal direction), keeping the chain taut, preventing the chain from falling off during operation, which may damage the chain and affect the normal operation of the scraper conveyor, and improving the working reliability of the scraper conveyor.

[0030] Combined with Figure 2 , wherein the adjusting assembly 40 includes a movable rod 401, a second elastic member 402, and an adjusting member 403 screwed onto the movable rod 401. The adjusting member 403 can be adjusted and moved along the axial direction of the movable rod 401 to adjust the compression amount of the second elastic member 402, thereby adjusting the tension force of the adjusting wheel 43 on the chain. One end of the movable rod 401 is connected to the tensioning assembly 2. The adjusting block 42 is sleeved on the movable rod 401 and can slide along the movable rod 401. The second elastic member 402 is sleeved on the movable rod 401 and is located between the adjusting member 403 and the adjusting block 42, and its two ends respectively abut against the adjusting block 42 and the adjusting member 403. During operation, the second elastic member 402 pushes the adjusting block 42 to move upward by its own elastic force, drives the swing arm 41 to lift through the lever 420, and the adjusting wheel 43 supports the chain to be tensioned.

[0031] When impacted, the first elastic member 32 and the second elastic member 402 will be compressed, which can play a protective role to prevent damage to the scraper conveyor.

[0032] In order to apply a tension force to the tensioning assembly 2 by the first tensioning mechanism 3, driving devices (not shown in the figure) are respectively provided on both sides of the tensioning bracket 1. The driving devices are used to drive the tensioning assembly 2 to move on the first tensioning mechanism 3. Among them, the driving device can be a hydraulic cylinder, and the driving ends of the driving devices on both sides of the tensioning bracket respectively abut against the tensioning assembly 2. During use, the driving device drives the tensioning assembly 2 to move a certain distance (downward), compresses the first elastic member 32 by the tensioning assembly 2, sleeved the chain on the tensioning assembly 2. At this time, the driving end of the driving device can be withdrawn, and the first tensioning mechanism 3 jacks up the tensioning assembly 2 to tension the chain. When the elastic force of the first elastic member 32 is greater than the elastic force of the second elastic member 402, the tensioning assembly 2 will move upward, and the swing arm 41 will move inward. At this time, the adjusting block 42 will move downward along the movable rod 401 to compress the second elastic member 402, so that the first elastic member 32 and the second elastic member 402 are balanced with each other, thus ensuring the chain tension force.

Claims

1. A tensioning mechanism for a scraper, used to adjust the tension of a scraper chain, comprising a tensioning bracket and a tensioning assembly, wherein the chain is sleeved on the tensioning assembly, and the tensioning bracket is arranged on the trough body at the tail end of the scraper, characterized in that: A first tensioning mechanism and a second tensioning mechanism are respectively provided on both sides of the tensioning bracket. A clearance groove is provided on the tensioning bracket. The tensioning assembly passes through the clearance groove and is connected to the first tensioning mechanism. The first tensioning mechanism is used to support the tensioning assembly to pre-tension the tensioning assembly, and the second tensioning mechanism independently tensions the corresponding chains.

2. The scraper conveyor tensioning mechanism according to claim 1, characterized in that: The first tensioning mechanism comprises a guide rod and an elastic component 1, wherein the guide rod is arranged on the tensioning bracket, the elastic component 1 is arranged on the guide rod, and two ends of the elastic component 1 are respectively abutted against the tensioning assembly and the tensioning bracket.

3. The tensioning mechanism of the scraper according to claim 1, characterized in that: The second tensioning mechanism includes a swing arm and an adjusting block, and an adjusting component that pushes the adjusting block to drive the swing arm. One end of the swing arm is rotatably connected to the tensioning assembly, and an adjusting wheel is provided on the movable end of the swing arm.

4. The scraper conveyor tensioning mechanism according to claim 3, characterized in that: The adjustment component includes a movable rod and an elastic component 2, and an adjustment component screwed on the movable rod. One end of the movable rod is connected to the tensioning assembly, the adjustment block is sleeved on the movable rod, and the elastic component 2 is sleeved on the movable rod, with two ends respectively abutting against the adjustment block and the adjustment component.

5. The tensioning mechanism of the scraper according to claim 3, characterized in that: The adjusting block is provided with a lever, the swing arm is provided with a limiting groove, and the lever slides along the limiting groove to drive the swing arm to swing.

6. The tensioning mechanism of the scraper according to claim 1, characterized in that: It also includes a driving device, and the driving devices corresponding to the tensioning assembly are respectively arranged on both sides of the tensioning bracket.

7. The scraper conveyor tensioning mechanism according to claim 1, characterized in that: The tensioning assembly includes a rotating shaft and a support seat. The rotating shaft is provided with a tensioning wheel. The support seats are respectively provided at both ends of the rotating shaft. The support seats are rotatably connected to the rotating shaft, and the support seats are arranged on the first tensioning mechanism.

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