阅读说明：本技术 紧链装置 (Chain tightening device ) 是由 陈玉博 梁鸿雁 柯昌青 于 2020-12-09 设计创作，主要内容包括：本发明提供了一种紧链装置,包括：连接座；第一制动钳臂,具有第一夹持端,第一制动钳臂与连接座枢转连接；第二制动钳臂,具有第二夹持端,第二制动钳臂与连接座枢转连接,第二制动钳臂与第一制动钳臂相对设置；驱动机构,包括测力组件,驱动机构与第一制动钳臂和第二制动钳臂连接；其中,测力组件用于测量第一夹持端与第二夹持端之间产生的夹持力。本发明的技术方案中,由于测力组件能够测量第一夹持端与第二夹持端之间产生的夹持力,这样现场工作人员能够准确的知道闸盘的制动力的大小,从而方便现场工作人员对闸盘的制动力进行调整,进而方便现场工作人员调整链条的预张紧力的大小,以确保现场的紧链工作能够安全且高效地完成。(The invention provides a chain tightening device, comprising: a connecting seat; the first brake caliper arm is provided with a first clamping end and is pivotally connected with the connecting seat; the second brake caliper arm is provided with a second clamping end and is pivotally connected with the connecting seat, and the second brake caliper arm is opposite to the first brake caliper arm; the driving mechanism comprises a force measuring assembly and is connected with the first brake caliper arm and the second brake caliper arm; the force measuring assembly is used for measuring clamping force generated between the first clamping end and the second clamping end. According to the technical scheme, the force measuring assembly can measure the clamping force generated between the first clamping end and the second clamping end, so that field workers can accurately know the braking force of the brake disc, the field workers can adjust the braking force of the brake disc conveniently, the field workers can adjust the pre-tensioning force of the chain conveniently, and the field chain tightening work can be completed safely and efficiently.)

1. A chain tensioner, comprising:

a connecting seat (10);

a first brake caliper arm (20) having a first clamping end (22), the first brake caliper arm (20) being pivotally connected to the connection base (10);

a second brake caliper arm (30) having a second clamping end (32), the second brake caliper arm (30) being pivotally connected to the connecting base (10), the second brake caliper arm (30) being disposed opposite the first brake caliper arm (20);

a drive mechanism (40) comprising a force measuring assembly (42), said drive mechanism (40) being connected to said first brake caliper arm (20) and said second brake caliper arm (30);

the driving mechanism (40) drives the second clamping end (32) to be close to the first clamping end (22) so as to clamp an object to be clamped, and the force measuring assembly (42) is used for measuring clamping force generated between the first clamping end (22) and the second clamping end (32).

2. The chain tensioner of claim 1, wherein the drive mechanism (40) further comprises a drive assembly (44), the first brake caliper arm (20) having a first drive end (24) disposed opposite the first gripping end (22), the second brake caliper arm (30) having a second drive end (34) disposed opposite the second gripping end (32), the drive assembly (44) being coupled to the first drive end (24) and the second drive end (34).

3. The chain tensioner according to claim 2, characterized in that the drive assembly (44) comprises:

a wobble shaft sleeve (442) connected to the first drive end (24);

a threaded lead screw (444) inserted into the swing sleeve (442) along an axial portion of the swing sleeve (442), the threaded lead screw (444) being rotatable with respect to the swing sleeve (442);

the threaded lead screw shaft sleeve (446) is sleeved on the outer periphery of the threaded lead screw (444) and is in threaded fit with the threaded lead screw (444), and at least part of the threaded lead screw shaft sleeve (446) is positioned between the inner wall surface of the swinging shaft sleeve (442) and the outer peripheral surface of the threaded lead screw (444);

the first limiting part (448) is sleeved on the periphery of the threaded screw rod (444), and the first limiting part (448) can limit the axial sliding of the swing shaft sleeve (442) on the threaded screw rod (444).

4. The chain tensioner as claimed in claim 3, wherein the threaded lead screw (444) comprises a limit shoulder (4442), and the swing bushing (442) comprises an annular protrusion (4422), wherein the annular protrusion (4422) is sleeved on the outer circumference of the threaded lead screw (444) and is located between the first limit piece (448) and the limit shoulder (4442).

5. The chain tensioner of claim 4, wherein the drive assembly (44) further comprises a wear washer (449), the wear washer (449) being fitted over the outer circumference of the threaded lead screw (444) between the annular protrusion (4422) and the stop shoulder (4442).

6. The chain tensioner according to any one of claims 1 to 5, characterized in that the load cell assembly (42) comprises a load cell (422), the load cell (422) comprising:

a stationary cylinder (4222);

a drive piston (4224) partially disposed within the stationary cylinder (4222), the drive piston (4224) being connected to a threaded lead screw boss (446) of the drive mechanism (40);

a pressure display device (4226) in communication with the internal cavity of the stationary cylinder (4222) for monitoring the pressure within the stationary cylinder (4222).

7. The chain tensioner according to claim 6, characterized in that the force measuring assembly (42) further comprises a support seat (424) and a fixing plug screw (426), the support seat (424) being used for supporting the fixing cylinder (4222), the fixing plug screw (426) being used for fixing the fixing cylinder (4222) on the support seat (424).

8. A chain tensioner according to any one of claims 1 to 5, characterized in that it further comprises a first connecting plate (50), said first connecting plate (50) being connected at one end to said driving mechanism (40) and at the other end to said first brake caliper arm (20), and/or said chain tensioner further comprises a second connecting plate (60), said second connecting plate (60) being connected at one end to said driving mechanism (40) and at the other end to said second brake caliper arm (30).

9. Chain tensioner according to any of claims 1 to 5, characterized in that it further comprises a shutter (70), said shutter (70) being provided on the first gripping end (22) and the second gripping end (32), respectively.

10. The chain tensioner according to any one of claims 1 to 5, further comprising a second stop (80), the second stops (80) being respectively provided on the first brake caliper arm (20) and the second brake caliper arm (30) for adjusting an opening distance of the first clamping end (22) when the second clamping end (32) is away from the first clamping end.

Technical Field

The invention relates to the technical field of scraper chain tensioning, in particular to a chain tensioning device.

Background

At present, the tensioning degree of scraper chain directly influences the running state and the performance of scraper conveyor, and tension can increase the wearing and tearing and the power loss of chain, and too loose can take place to pile the chain phenomenon and influence the meshing of chain and sprocket, leads to the emergence of chain jump, chain breakage accident, probably causes the incident on scene.

In the related art, the chain is tightened directly by matching a motor of the scraper conveyor with a chain tightening device, and the chain tightening device is used for braking a brake disc of the motor. However, the motor has a high rotation speed and a large impact force, and the pretensioning force of the chain is difficult to determine, so that the chain is tensioned completely by the experience of field workers, which easily causes the problem of over-tightening or over-loosening of the chain, and it is difficult to ensure that the chain tensioning work of the scraper chain can be completed safely and efficiently.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art or the related art.

To this end, it is an object of the present invention to provide a chain tensioner.

In order to achieve the above object, an embodiment of the present invention provides a chain tensioner, including: a connecting seat; the first brake caliper arm is provided with a first clamping end and is pivotally connected with the connecting seat; the second brake caliper arm is provided with a second clamping end and is pivotally connected with the connecting seat, and the second brake caliper arm is opposite to the first brake caliper arm; the driving mechanism comprises a force measuring assembly and is connected with the first brake caliper arm and the second brake caliper arm; the driving mechanism drives the second clamping end to be close to the first clamping end so as to clamp an object to be clamped, and the force measuring assembly is used for measuring clamping force generated between the first clamping end and the second clamping end.

In this technical scheme, because the clamping-force that produces between first exposed core and the second exposed core can be measured to the dynamometry subassembly, the size of knowing the brake force of brake disc that field worker can be accurate like this, clamping-force size promptly to make things convenient for field worker to adjust the brake force of brake disc, and then make things convenient for field worker to adjust the size of the pretension force of chain, can accomplish safely and high-efficiently with the tight chain work of assurance scene.

In addition, the chain tightening device provided by the invention in the above embodiment may further have the following additional technical features:

in the above technical solution, the driving mechanism further includes a driving assembly, the first brake caliper arm has a first driving end disposed opposite to the first clamping end, the second brake caliper arm has a second driving end disposed opposite to the second clamping end, and the driving assembly is connected to the first driving end and the second driving end.

In the technical scheme, when the driving mechanism drives the second driving end to be far away from the first driving end, the second brake caliper arm is close to and clamped with the first brake caliper arm, and therefore the driving mechanism drives the second driving end to achieve the brake function of the brake caliper arm on the brake disc. Therefore, the chain tightening device can normally tighten the chain, and the on-site chain tightening work can be smoothly completed.

In any of the above solutions, the driving assembly includes: the swing shaft sleeve is connected with the first driving end; the threaded lead screw is inserted into the swing shaft sleeve along the axial part of the swing shaft sleeve and can rotate relative to the swing shaft sleeve; the threaded lead screw shaft sleeve is sleeved on the periphery of the threaded lead screw and is in threaded fit with the threaded lead screw, and at least part of the threaded lead screw shaft sleeve is positioned between the inner wall surface of the swinging shaft sleeve and the peripheral surface of the threaded lead screw; the first limiting part is sleeved on the periphery of the threaded screw rod and can limit the swinging shaft sleeve to axially slide on the threaded screw rod.

In this technical scheme, utilize lead screw drive's principle, through rotatory screw lead screw for screw lead screw shaft sleeve slides on screw lead screw towards the direction of keeping away from screw lead screw, and screw lead screw shaft sleeve drives the direction swing of second drive end towards keeping away from first drive end like this, and the second brake caliper arm is then close to with first brake caliper arm and presss from both sides tightly simultaneously, in order to realize the braking function of brake caliper arm to the brake disc. Thereby ensuring that the chain tensioner can work normally. In addition, when the threaded screw rotates, the first limiting part can prevent the swinging shaft sleeve from axially sliding on the threaded screw, namely, prevent the first brake caliper arm from swinging relative to the threaded screw, so that the second brake caliper arm can clamp the brake disc when being close to the first brake caliper arm, and the chain tightening device can normally work.

In any one of the above technical solutions, the threaded lead screw includes a limiting shoulder, the swing shaft sleeve includes an annular protrusion, and the annular protrusion is sleeved on the periphery of the threaded lead screw and located between the first limiting part and the limiting shoulder.

In the technical scheme, the first limiting part and the limiting shoulder limit the reciprocating sliding of the swing shaft sleeve on the threaded screw rod, so that the second brake caliper arm can clamp the brake disc when being close to the first brake caliper arm, and the chain tightening device can normally work.

In any of the above technical solutions, the driving assembly further includes an anti-wear washer, the anti-wear washer is sleeved on the periphery of the threaded lead screw and is located between the annular protrusion and the limiting shoulder.

In the technical scheme, when the anti-abrasion gasket is arranged, the problem that the threaded lead screw and the swing shaft sleeve are abraded due to the fact that the threaded lead screw is in direct contact with the swing shaft sleeve when the threaded lead screw and the swing shaft sleeve rotate relatively is solved, the service life of the threaded lead screw and the swing shaft sleeve is prolonged, and meanwhile, the use cost and the maintenance cost of the chain tightening device are saved.

In any one of the above technical solutions, the force measuring assembly includes a force measuring piece, and the force measuring piece includes: fixing the cylinder body; the driving piston is partially arranged in the fixed cylinder body and is connected with a threaded lead screw shaft sleeve of the driving mechanism; and the pressure display device is communicated with the inner cavity of the fixed cylinder body and is used for monitoring the pressure in the fixed cylinder body.

In the technical scheme, when the second brake caliper arm and the first brake caliper arm are close to clamp the brake disc, the threaded screw shaft sleeve applies an acting force to the driving piston, the driving piston can apply pressure to hydraulic oil in the fixed cylinder body, and the pressure value displayed by the pressure display device is clamping force between the second brake caliper arm and the first brake caliper arm.

In any of the above technical solutions, the force measuring assembly further includes a support seat and a fixing plug screw, the support seat is used for supporting the fixed cylinder body, and the fixing plug screw is used for fixing the fixed cylinder body on the support seat.

In the technical scheme, the fixed cylinder body is fixed on the supporting seat, so that the force measuring piece can measure force stably, the problem of force measurement inaccuracy caused by shaking of the force measuring piece during force measurement is avoided, and the accuracy and the reliability of force measurement of the force measuring piece are ensured.

In any of the above technical solutions, the chain tensioner further includes a first connecting plate, one end of the first connecting plate is connected to the driving mechanism, and the other end of the first connecting plate is connected to the first brake caliper arm, and/or the chain tensioner further includes a second connecting plate, one end of the second connecting plate is connected to the driving mechanism, and the other end of the second connecting plate is connected to the second brake caliper arm.

In the technical scheme, the first brake caliper arm and the second brake caliper arm are connected with the driving mechanism through different connecting plates, so that the connecting strength of the first brake caliper arm and the driving mechanism and the connecting strength of the second brake caliper arm and the driving mechanism are enhanced, and the strength requirement of the chain tightening device during working is met.

In any one of the above technical solutions, the chain tightening device further includes a brake block, and the brake block is respectively disposed on the first clamping end and the second clamping end.

In this technical scheme, chain tightening device passes through the brake block and the cooperation of brake disc to the realization is to the locking braking function of brake disc, thereby ensures that chain tightening device can normally tighten the chain, and then ensures that on-the-spot chain tightening work can accomplish smoothly.

In any of the above technical solutions, the chain tightening device further includes a second limiting member, and the second limiting member is respectively disposed on the first braking jawarms and the second braking jawarms and is used for adjusting an opening distance when the first clamping end and the second clamping end are away from each other.

In the technical scheme, the opening distance is adjustable, so that brake discs of different sizes and models can be clamped conveniently, the opening distance is adjusted to be larger than the thickness of the brake disc to be clamped, and therefore the convenience of the chain tightening device is improved, and the working efficiency of the chain tightening device is improved.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 shows a schematic structural diagram of a chain tensioner according to an embodiment of the present invention;

FIG. 2 shows a right side view of the chain tensioner of FIG. 1;

fig. 3 shows a top view of the chain tensioner of fig. 2.

Wherein, the correspondence between the reference numbers and the component names in fig. 1 to 3 is:

10. a connecting seat; 12. supporting ribs; 20. a first brake caliper arm; 22. a first clamping end; 24. a first driving end; 30. a second brake caliper arm; 32. a second clamping end; 34. a second drive end; 40. a drive mechanism; 42. a force measuring assembly; 422. a force measuring member; 4222. fixing the cylinder body; 4224. a drive piston; 4226. a pressure display device; 424. a supporting seat; 426. fixing the screw plug; 44. a drive assembly; 441. a hand wheel; 442. a swing shaft sleeve; 4422. an annular projection; 444. a threaded lead screw; 4442. a limiting shoulder; 446. a threaded lead screw shaft sleeve; 448. a first limit piece; 449. an anti-wear washer; 50. a first connecting plate; 60. a second connecting plate; 70. a brake block; 80. a second limiting member.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

It should be noted that the scraper conveyor is one of the main devices of the fully mechanized mining face, and during the working process, the load of the scraper conveyor may be changed continuously by the reciprocating motion of the coal mining machine, the coal cutting speed, the support moving, and the like, and the scraper chain is loosened and tightened. Along with the increase of the length of the working face, the tightness of the scraper chain changes more and more obviously. The chain cannot be smoothly meshed with or separated from the chain wheel when being too loose, the chain is easy to accumulate and kink, the closed bottom chain channel is scratched and clamped, and the chain is easy to be abnormally abraded and broken. The chain is too tight, and scraper conveyor's running resistance increases, and equipment starts the difficulty, and operating power increases, and the wearing and tearing aggravation of scraper conveyor's spare part leads to its life to reduce. The chain is an elastic body and can generate elastic elongation deformation under the action of traction force, and the elongation can cause the chain to be loose and piled up, and even cause the chain to be twisted to generate operation failure. The chain tensioning aims to eliminate the elongation deformation, and the chain maintains uniform pre-tensioning force. When the conveyor after chain tightening runs under load, the tension and deformation of the chain are redistributed along with the load, thus ensuring that the scraper conveyor can work normally.

Chain tightening device in this application is arranged in the tensioning of the scraper chain of scraper conveyor, specifically is to come the tensioning scraper chain with scraper conveyor's motor cooperation, applys certain pretightning force for the scraper chain, makes it be in the tensioning state of moderate degree to guarantee the normal operating of scraper chain.

A chain tensioner according to some embodiments of the present invention is described below with reference to fig. 1-3.

As shown in fig. 1 to 3, the present invention and the embodiments of the present invention provide a chain tensioner including a connecting base 10, a first brake caliper arm 20, a second brake caliper arm 30, and a driving mechanism 40. The first caliper arm 20 has a first clamping end 22, and the first caliper arm 20 is pivotally connected to the connecting base 10. The second caliper arm 30 has a second clamping end 32, the second caliper arm 30 is pivotally connected to the connecting base 10, and the second caliper arm 30 is disposed opposite to the first caliper arm 20. The drive mechanism 40 includes a load cell assembly 42, and the drive mechanism 40 is coupled to the first and second caliper arms 20, 30. The driving mechanism 40 drives the second clamping end 32 to approach the first clamping end 22 to clamp the object to be clamped, and the force measuring assembly 42 is used for measuring the clamping force generated between the first clamping end 22 and the second clamping end 32.

In the above arrangement, since the force measuring assembly 42 can measure the clamping force generated between the first clamping end 22 and the second clamping end 32, the field worker can accurately know the magnitude of the braking force of the brake disc, that is, the clamping force, so that the field worker can conveniently adjust the braking force of the brake disc, and further the field worker can conveniently adjust the pre-tensioning force of the chain, thereby ensuring that the chain tightening work on the field can be completed safely and efficiently.

It should be noted that the chain tightening device in the present application is used for locking a brake disc of a driving motor of a scraper conveyor, and the brake disc is braked to tighten and tighten a scraper chain. The object to be clamped in the application is the brake disc of the driving motor.

It should be noted that, the braking force of the brake disc is in a proportional relationship with the pretensioning force of the chain, so that the field worker can adjust the pretensioning force of the chain by adjusting the braking force of the brake disc.

Specifically, as shown in fig. 1-3, in an embodiment of the present invention, the actuating mechanism 40 further includes an actuating assembly 44, the first brake arm 20 having a first actuating end 24 disposed opposite the first clamping end 22, the second brake arm 30 having a second actuating end 34 disposed opposite the second clamping end 32, the actuating assembly 44 being coupled to the first actuating end 24 and the second actuating end 34.

In the above arrangement, when the driving mechanism 40 drives the second driving end 34 to move away from the first driving end 24, the second caliper arm 30 is clamped close to the first caliper arm 20, so that the driving mechanism 40 drives the second driving end 34 to perform the braking function of the caliper arm on the brake disc. Therefore, the chain tightening device can normally tighten the chain, and the on-site chain tightening work can be smoothly completed.

Specifically, as shown in fig. 1-3, in an embodiment of the present invention, the drive assembly 44 includes a wobble shaft sleeve 442, a threaded lead screw 444, a threaded lead screw shaft sleeve 446, and a first stop 448. The swivel sleeve 442 is connected to the first drive end 24. A threaded lead screw 444 is inserted into the swing boss 442 along an axial portion of the swing boss 442, and the threaded lead screw 444 is rotatable with respect to the swing boss 442. The threaded lead screw shaft sleeve 446 is sleeved on the periphery of the threaded lead screw 444 and is in threaded fit with the threaded lead screw 444, and the threaded lead screw shaft sleeve 446 is partially positioned between the inner wall surface of the swinging shaft sleeve 442 and the outer peripheral surface of the threaded lead screw 444. The first limiting member 448 is sleeved on the outer periphery of the threaded lead screw 444, and the first limiting member 448 can limit the axial sliding of the swing shaft sleeve 442 on the threaded lead screw 444.

In the above arrangement, by using the principle of screw transmission, the threaded screw 444 is rotated to make the threaded screw sleeve 446 slide on the threaded screw 444 in the direction away from the threaded screw 444, so that the threaded screw sleeve 446 drives the second driving end 34 to swing in the direction away from the first driving end 24, and at the same time, the second brake caliper arm 30 is clamped close to the first brake caliper arm 20, so as to realize the brake function of the brake caliper arm on the brake disc. Thereby ensuring that the chain tensioner can work normally. In addition, when the screw 444 is rotated, the first stopper 448 prevents the swing bushing 442 from sliding axially on the screw 444, i.e., prevents the first caliper arm 20 from swinging with respect to the screw 444, which ensures that the second caliper arm 30 can clamp the brake disc when approaching the first caliper arm 20, thereby ensuring that the chain tensioner can operate normally.

It should be noted that, as shown in fig. 1 and 2, in the embodiment of the present invention, in order to facilitate the field person to rotate the threaded screw 444, a hand wheel 441 is disposed at one end of the threaded screw 444, and the field person can operate the hand wheel 441 to rotate the threaded screw 444. Therefore, the convenience of the chain tightening device is improved, and the working efficiency of the chain tightening device is further improved.

Specifically, as shown in fig. 1 to 3, in the embodiment of the present invention, the threaded screw 444 includes a limiting shoulder 4442, the swing shaft sleeve 442 includes an annular protrusion 4422, and the annular protrusion 4422 is disposed on the outer circumference of the threaded screw 444 and located between the first limiting member 448 and the limiting shoulder 4442.

In the above arrangement, the first stop 448 and the stop shoulder 4442 limit the reciprocal sliding movement of the swing bushing 442 on the threaded lead screw 444, which ensures that the second caliper arm 30 can clamp the brake disc when it approaches the first caliper arm 20, thereby ensuring that the chain tensioner can operate properly.

Specifically, as shown in fig. 1-3, in an embodiment of the present invention, the driving assembly 44 further includes an anti-wear washer 449, which is fitted over the outer circumference of the threaded lead screw 444 and is located between the annular protrusion 4422 and the stop shoulder 4442.

In the above arrangement, the wear-resistant washer 449 is arranged to avoid the problem that the threaded lead screw 444 and the swing shaft sleeve 442 are worn due to the fact that the threaded lead screw 444 and the swing shaft sleeve 442 are directly contacted when the threaded lead screw 444 and the swing shaft sleeve 442 rotate relatively, so that the service lives of the threaded lead screw 444 and the swing shaft sleeve 442 are prolonged, and the use and maintenance costs of the chain tightening device are saved.

Specifically, as shown in fig. 1 to 3, in an embodiment of the present invention, the force measuring assembly 42 comprises a force measuring piece 422, the force measuring piece 422 comprising a stationary cylinder 4222, a driving piston 4224 and a pressure display device 4226. The drive piston 4224 is partially disposed in the fixed cylinder 4222, and the drive piston 4224 is connected to the threaded spindle sleeve 446 of the drive mechanism 40, specifically, the drive piston 4224 is connected to the threaded spindle sleeve 446. The pressure display device 4226 is in communication with the inner cavity of the stationary cylinder 4222 for monitoring the pressure within the stationary cylinder 4222.

In the above arrangement, when the second brake caliper arm 30 and the first brake caliper arm 20 approach to clamp the brake disc, the threaded lead screw sleeve 446 applies an acting force to the driving piston 4224, the driving piston 4224 applies a pressure to the hydraulic oil in the fixed cylinder 4222, and the pressure value displayed by the pressure display device 4226 is the clamping force between the second brake caliper arm 30 and the first brake caliper arm 20, so that the field worker can accurately know the braking force of the brake disc, and therefore the field worker can conveniently adjust the braking force of the brake disc, and further control the chain pre-tensioning force, and the chain tightening work on the field can be safely and efficiently completed.

Specifically, in the embodiment of the present invention, the force measuring member 422 includes a hydraulic jack (including the fixed cylinder 4222 and the driving piston 4224), but of course, the force measuring member 422 may include a hydraulic cylinder or other force measuring device having a force measuring function, such as a spring force measuring device, according to the actual situation. In the embodiment of the present invention, the pressure display device 4226 is a pressure gauge, and of course, the pressure display device 4226 may be configured as an electronic pressure display device according to actual conditions.

Specifically, as shown in fig. 1 to 3, in the embodiment of the present invention, the force measuring assembly 42 further includes a supporting seat 424 and a fixing screw 426, the supporting seat 424 is used for supporting the fixing cylinder 4222, and the fixing screw 426 is used for fixing the fixing cylinder 4222 on the supporting seat 424.

In the above arrangement, the fixing cylinder 4222 is fixed on the supporting seat 424, so that the force measuring piece 422 can measure force stably, the problem of force measurement inaccuracy caused by shaking of the force measuring piece 422 during force measurement is avoided, and the accuracy and reliability of force measurement of the force measuring piece 422 are ensured.

Specifically, as shown in fig. 3, in the embodiment of the present invention, the chain tensioner further includes two first connecting plates 50 disposed opposite to each other, one end of each of the two first connecting plates 50 is connected to the driving mechanism 40, and the other end thereof is connected to the first caliper arm 20, and the chain tensioner further includes two second connecting plates 60, one end of each of the two second connecting plates 60 is connected to the driving mechanism 40, and the other end thereof is connected to the second caliper arm 30.

In the above arrangement, the first and second brake caliper arms 20 and 30 are connected to the driving mechanism 40 through different connecting plates, so that the connecting strength between the first and second brake caliper arms 20 and 30 and the driving mechanism 40 is enhanced, and the strength requirement of the chain tensioner during operation is met.

Specifically, as shown in fig. 1 to 3, in the embodiment of the present invention, the chain tensioner further includes a gate 70, and the gate 70 is respectively disposed on the first and second clamping ends 22 and 32.

In the above arrangement, the chain tightening device is matched with the brake disc through the brake block 70 to realize the locking and braking functions of the brake disc, so as to ensure that the chain tightening device can normally tighten the chain, and further ensure that the chain tightening work on site can be smoothly completed.

It should be noted that, a plurality of protrusions are disposed on the brake block 70, a plurality of grooves are correspondingly disposed on the brake disc, and the protrusions and the grooves are in concave-convex fit, so as to realize the locking and braking functions of the brake disc.

Specifically, as shown in fig. 1 to 3, in the embodiment of the present invention, the chain tightening device further includes a second limiting member 80, and the second limiting member 80 is respectively disposed on the first caliper arm 20 and the second caliper arm 30, and is used for adjusting an opening distance when the first clamping end 22 and the second clamping end 32 are away from each other.

In the above-mentioned setting, because open the distance adjustable, make things convenient for the brake disc of centre gripping unidimensional and model like this, will open the distance and transfer to be greater than treat the thickness of the brake disc of centre gripping can to improve the convenience of the use of tight chain device, and then improved the work efficiency of tight chain device.

It should be noted that, as shown in fig. 1 to fig. 3, in the embodiment of the present invention, the second limiting member 80 includes two oppositely disposed screws, the two screws are respectively inserted into the first caliper arm 20 and the second caliper arm 30, one end of the two screws, which are oppositely disposed, can be abutted against the support rib 12 of the connecting seat 10, and the adjustment of the opening distance can be realized by adjusting the distance between the screw and the corresponding caliper arm, where the opening distance in the present application refers to the minimum distance between the first clamping end 22 and the second clamping end 32 along the axial direction of the threaded screw 444.

It should be noted that, the chain tightening device in this application need not external power, has good maneuverability and security performance, and simple structure, low in manufacturing cost, long service life, convenient to use. The chain tightening device in the application can accurately determine the chain pre-tightening force, and changes the conventional chain tightening operation which is completed on site completely by the experience of site workers.

From the above description, it can be seen that, since the force measuring assembly 42 can measure the clamping force generated between the first clamping end 22 and the second clamping end 32, the field worker can accurately know the magnitude of the braking force of the brake disc, that is, the magnitude of the clamping force, so that the field worker can conveniently adjust the braking force of the brake disc, and further the field worker can conveniently adjust the magnitude of the pre-tensioning force of the chain, so as to ensure that the chain tensioning work on the field can be completed safely and efficiently.

In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to 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.