CN211365945U - Chain tightening device of scraper conveyor - Google Patents

Abstract

The utility model discloses a scrape chain tightening device of trigger, the setting is in the mining reduction gear place side of trigger, relate to transportation machinery technical field, casing on the trigger is scraped including the relatively fixed, the rocking handle of setting on the casing, the output shaft of setting on the casing, the arrestment mechanism of fixed rocking handle position, a clutch mechanism for making the second input shaft of output shaft and mining reduction gear joint or separation, the rocking handle can take place relative rotation with the casing by the atress, mining output shaft is connected with the rocking handle transmission, the output shaft uses self axis as the axle rotation, and the axis coincidence of the axis of output shaft and the second input shaft of mining reduction gear, when clutch mechanism is in first state, the output shaft is connected with the second input shaft transmission of mining reduction gear, when clutch mechanism is in the second state, the output shaft breaks away from the connection with the second input shaft of mining reduction gear. So set up, solved chain tensioner among the prior art and taken place the chain ring easily and pop out the accident, cause operating personnel injured's problem when using.

Description

Chain tightening device of scraper conveyor

Technical Field

The utility model relates to a transport machinery technical field, more specifically say, relate to a scrape chain tightening device of trigger.

Background

The scraper is a continuous transportation device which is arranged in a closed rectangular section shell and used for conveying bulk materials by means of a moving scraper chain, and is widely applied to industries such as metallurgy, building materials, electric power, chemical engineering, cement, ports, docks, coal, mines, grain and oil, food, feed and the like, wherein the scraper is mainly used for the transportation of coal mining working faces and mining areas along a trough in coal mining. The scraper chain of scraper drives the scraper blade at work and carries the goods along the chute, in the transportation, probably takes place to scrape the scraper chain and cross the pine and take place to scrape the scraper chain jam in dialling the chain ware, leads to the chain to jump out the sprocket, takes place accident such as chain rupture, still can make the chain appear scraping the accident that the scraper chain falls the way in the return-to-air section. Therefore, in order to ensure the normal operation of the scraper chain, the scraper chain must be tensioned by a chain tensioning device to be in a proper tensioning state.

The reducer of the scraper chain used in the coal mine operation is a mining reducer and comprises a first input shaft connected with a motor at the head part and a second input shaft vertical to the first input shaft, in the prior art, a chain stopper is generally installed in the chain tightening process, then an electric device connected with the second input shaft drives a chain wheel to drive the scraper chain to rotate reversely, namely, the chain wheel rotates in the direction opposite to the rotating direction of the chain wheel when the scraper chain normally works, when the scraper chain is tensioned to a certain degree and meets the pre-tightening requirement, the electric device is stopped and braked, then redundant chain rings are taken out from the accumulated scraper chain, the scraper chain is re-jointed, finally the chain wheel slowly rotates forwards, and the chain stopper is taken down, however, the pre-tightening force of the scraper chain is increased at a higher speed due to the fact that the chain wheel is driven by the electric device, and an operator needs to stop the electric device after finding that the pre-tightening force is qualified, a larger pre-tightening force is easily achieved during braking, and when the chain is taken in operation, the accident that the chain ring is popped up is easily caused, so that operators are injured.

Therefore, how to solve the problem that the chain tightening device in the prior art is easy to cause the ejection accident of the chain ring and hurt the operator when in use becomes an important technical problem to be solved by the technical personnel in the field.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a scrape chain tightening device of trigger, it has solved the chain link and has popped out the accident, cause operating personnel injured problem easily to take place than the chain tightening device among the prior art when using. The utility model provides a plurality of technical effects that preferred technical scheme among a great deal of technical scheme can produce see the explanation below in detail.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides a pair of scrape chain tightening device of trigger sets up in the mining reduction gear place side of scraping the trigger, include:

a shell fixed on the scraper machine relatively;

the rocking handle is arranged on the shell, can be stressed and can rotate relative to the shell;

the output shaft is arranged on the shell and is in transmission connection with the rocking handle, the output shaft rotates by taking the axis of the output shaft as a shaft, and the axis of the output shaft is superposed with the axis of a second input shaft of the mining speed reducer;

the brake mechanism is used for fixing the position of the rocking handle;

and the clutch mechanism is used for enabling the output shaft to be connected with or separated from the second input shaft of the mining speed reducer, when the clutch mechanism is in a first state, the output shaft is in transmission connection with the second input shaft of the mining speed reducer, and when the clutch mechanism is in a second state, the output shaft is disconnected from the second input shaft of the mining speed reducer.

Preferably, the clutch mechanism comprises a moving member which can be in key connection with both the output shaft and the second input shaft of the mining speed reducer, the moving position of the moving member comprises a first position and a second position, when the moving member is located at the first position, the clutch mechanism is in a first state, and when the moving member is located at the second position, the clutch mechanism is in a second state.

Preferably, the clutch mechanism further includes a first external spline disposed on the output shaft and a second external spline disposed on a second input shaft of the mining speed reducer, the moving member is sleeved around the first external spline and the second external spline, and a spline tooth capable of meshing with the first external spline and the second external spline is disposed on an inner side wall of the moving member, the moving member is engaged with the first external spline and the second external spline when located at a first position, and the moving member is away from the first external spline or the second external spline to a non-connection relationship when located at a second position.

Preferably, a groove is arranged on the outer side wall of the moving member, and the groove surrounds the outer side wall of the moving member.

Preferably, the device further comprises a shifting fork for controlling the moving member to move between the first position and the second position, and the arc-shaped opening of the shifting fork can be embedded into the groove.

Preferably, the moving member includes an inner cylinder and an outer cylinder arranged in the circumferential direction of the inner cylinder, a plurality of balls are arranged between the inner cylinder and the outer cylinder to enable the inner cylinder to rotate relative to the outer cylinder, the key teeth are arranged on the inner side wall of the inner cylinder, the groove is arranged on the outer side wall of the outer cylinder, and the shifting fork is arranged in the groove.

Preferably, the brake mechanism includes a ratchet fixedly connected to the handle and a pawl rotatably connected to the housing.

Preferably, a compression spring is provided on the pawl to press the pawl in the ratchet teeth of the ratchet wheel.

Preferably, the shifting fork further comprises a fixing piece fixed on the housing, and the handle of the shifting fork is rotatably connected with the fixing piece.

Preferably, the fixing part is a straight rod, the middle part of the handle part of the shifting fork is connected with the straight rod through a pin shaft, and when the tail end of the handle part of the shifting fork is stressed, the shifting fork drives the moving part to move.

The utility model provides an among the technical scheme, the rocking handle is as the hand power input medium that provides the turning force of operator, clutch mechanism is as the connection link of transmission moment of torsion between the second input shaft of output shaft and mining reduction gear, when clutch mechanism is located the first state, rotate the rocking handle, thereby the output shaft rotates the second input shaft that drives mining reduction gear and rotates, the sprocket also reverses gradually thereupon this moment, because operator manual input power, speed is gentler, and the operator can perceive the pretightning force and increase gradually, can in time stall and prevent reversing through the fixed rocking handle of arrestment mechanism when scraping the pretightning force of scraper chain and meeting the requirements, then get the chain operation, after tight chain process is accomplished, make clutch mechanism be located the second state, the output shaft and the second input shaft disconnection of mining reduction gear this moment. So set up, solved chain tensioner among the prior art and taken place the chain ring easily and pop out the accident, cause operating personnel injured's problem when using.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of a chain tightening device of a scraper in an embodiment of the present invention;

fig. 2 is a schematic structural view of a clutch mechanism in an embodiment of the present invention;

fig. 3 is a schematic structural view of a moving member in an embodiment of the present invention.

In fig. 1-3:

1. a housing; 2. a rocking handle; 3. an output shaft; 4. a second input shaft of the mining speed reducer; 5. a clutch mechanism; 51. a moving member; 52. a first external spline; 53. a second male spline; 54. a groove; 55. a shifting fork; 56. a key tooth; 511. an inner barrel; 512. an outer cylinder; 513. a ball bearing; 6. a ratchet wheel; 7. a pawl; 8. a compression spring; 9. a straight rod; 101. a first annular block; 102. a second annular block; 103. a protruding rod.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

An object of this embodiment is to provide a chain tightening device of scraper blade machine, it can solve chain tightening device among the prior art and take place chain ring ejection accident, cause the injured problem of operating personnel easily when using.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. The embodiments described below do not limit the scope of the invention described in the claims. Further, the entire contents of the configurations shown in the following embodiments are not limited to those necessary as a solution of the invention described in the claims.

Referring to fig. 1, the chain tightening device for a scraper conveyor provided in this embodiment is disposed at a side of a mining reducer of the scraper conveyor, and includes a housing 1, a rocking handle 2, an output shaft 3, a braking mechanism, and a clutch mechanism 5, where the housing 1 is relatively fixed to the scraper conveyor, specifically, a base fixedly connected to the scraper conveyor may be disposed, the housing 1 is fixedly connected to the base, the rocking handle 2 is disposed on the housing 1, the rocking handle 2 may be forced to rotate relative to the housing 1, specifically, the rocking handle 2 may be set as a crank for facilitating rotation of an operator, the output shaft 3 is disposed on the housing 1, and is in transmission connection with the rocking handle 2, specifically, may be set in a shaft connection manner, a gear connection manner, and the like, the output shaft 3 rotates around its own axis, and the axis of the output shaft 3 coincides with the axis of a second input shaft 4 of the mining reducer, the braking mechanism is used for fixing the position of the rocking handle 2, the clutch mechanism 5 is used for enabling the output shaft 3 to be connected with or separated from the second input shaft 4 of the mining speed reducer, when the clutch mechanism 5 is in a first state, the output shaft 3 is in transmission connection with the second input shaft 4 of the mining speed reducer, and when the clutch mechanism 5 is in a second state, the output shaft is disconnected with the second input shaft 4 of the mining speed reducer.

So arranged, an operator inputs rotating force through the hand rocking handle 2, the clutch mechanism 5 can transmit the torque of the output shaft 3 to the second input shaft 4 of the mining speed reducer, when the clutch mechanism 5 is in the first state, the rocking handle 2 is rotated, the output shaft 3 rotates to drive the second input shaft 4 of the mining speed reducer to rotate, at the moment, the chain wheel also gradually rotates reversely, because the operator inputs power manually, the speed is slow, and the operator can sense that the pretightening force is gradually increased, when the pretightening force of the scraper chain meets the requirement, the rotation can be stopped in time and the rocking handle 2 is fixed by the braking mechanism to prevent the reverse rotation, then, the chain taking operation is carried out, after the chain tightening process is completed, the clutch mechanism 5 is located in the second state, the output shaft 3 is disconnected with the second input shaft 4 of the mining speed reducer, normal work of the chain wheel cannot be influenced by operation of the rocking handle 2, and running safety of equipment is guaranteed. So set up, solved chain tensioner among the prior art and taken place the chain ring easily and pop out the accident, cause operating personnel injured's problem when using.

In particular, the braking mechanism may be arranged to comprise a ratchet 6 fixedly connected relative to the handle 2 and a pawl 7 rotatably connected to the housing 1, the handle 2 being non-reversible during tightening of the chain due to the orientation of the teeth of the ratchet 6.

The connection relation between the ratchet wheel 6 and the rocking handle 2 can also be set as that a first circular ring block 101 and a second circular ring block 102 are arranged between the rocking handle 2 and the ratchet wheel 6, the second circular ring block 102 can be embedded into the first circular ring block 101, the first circular ring block 101 is fixedly connected with the ratchet wheel 6, the second circular ring block 102 is fixedly connected with the rocking handle 2, a convex rod 103 extending along the radius direction is arranged on the second circular ring block 102, the convex rod 103 can be screwed into or out of the second circular ring block 102, a clamping groove for clamping the convex rod 103 is arranged on the first circular ring block 101, and the arrangement is such that after the chain tightening process is completed, if the pretightening force needs to be slowly released, the convex rod 103 can be taken down, the rocking handle 2 can rotate in the opposite direction, and the rocking handle 2 can be separated from braking without lifting the pawl 7.

Preferably, a compression spring 8 is provided, one end of which is fixed on the housing 1, and the other end of which is fixed on the pawl 7, and the compression spring 8 presses the pawl 7 in the ratchet of the ratchet 6, so as to further enhance the braking capability of the braking mechanism on the rocking handle 2.

More specifically, because the key-type connection mode has simple structure, good centering nature, install and remove advantages such as maintenance convenience, clutching mechanism 5 optional setting includes the movable member 51 that all can the key-type connection with output shaft 3 and mining reduction gear's second input shaft 4, and the moving position of movable member 51 includes first position and second position, and when movable member 51 was located the first position, clutching mechanism 5 was in the first state, and when movable member 51 was located the second position, clutching mechanism 5 was in the second state.

As a preferred embodiment, since the spline connection has the advantage of large transmission torque and is suitable for the use environment requiring frequent slippage, referring to fig. 2, the clutch mechanism 5 may be specifically configured to further include a first external spline 52 disposed on the output shaft 3 and a second external spline 53 disposed on the second input shaft 4 of the mining speed reducer, the moving member 51 is sleeved in the circumferential direction of the first external spline 52 and the second external spline 53, and the inner side wall of the moving member 51 is provided with a spline tooth 56 capable of meshing with the first external spline 52 and the second external spline 53, when the moving member 51 is located at the first position, the spline tooth 56 of the moving member 51 meshes with the tooth of the first external spline 52 and the tooth of the second external spline 53 to realize the connection between the output shaft 3 and the second input shaft 4 of the mining speed reducer, when the moving member 51 is located at the second position, the moving member 51 is far away from the first external spline 52 or the second external spline 53 to a non-connection relationship, thereby achieving the purpose of disconnecting the output shaft 3 from the second input shaft 4 of the mining speed reducer.

Further, can choose to set up recess 54 on the lateral wall of moving member 51, recess 54 encircles the lateral wall setting of moving member 51, when needs make moving member 51 be in primary importance or second place, uses in external tool stretches into recess 54, then stir moving member 51 can, the operation is safe.

Preferably, referring to fig. 2, a shifting fork 55 may be disposed to control the moving member 51 to move between the first position and the second position, and an arc-shaped opening of the shifting fork 55 may be inserted into the groove 54, so that when the position of the moving member 51 needs to be changed, the shifting fork 55 is inserted into the groove 54, and then the moving member 51 is shifted, and after the moving member 51 is located at the first position or the second position, the shifting fork 55 is removed.

As a preferred embodiment, referring to fig. 3, the moving member 51 may be configured to include an inner cylinder 511 and an outer cylinder 512 disposed in a circumferential direction of the inner cylinder 511, a plurality of balls 513 are disposed between the inner cylinder 511 and the outer cylinder 512, the key teeth 56 are disposed on an inner sidewall of the inner cylinder 511, the grooves 54 are disposed on an outer sidewall of the outer cylinder 512, and the shifting fork 55 is disposed in the grooves 54, so that the inner cylinder 511 may rotate relative to the outer cylinder 512, and thus the shifting fork 55 may be selectively fixed in the grooves 54, the shifting fork 55 may not rotate following, and the shifting fork 55 may be directly shifted when the moving member 51 needs to be moved, which is convenient and fast.

Optionally, set up shift fork 55 in the position that the operator easily reaches, specifically for setting up the mounting of relatively fixing at casing 1, the mounting can set up the position in moving member 51 top, rotationally be connected the stalk portion and the mounting of shift fork 55, can also set up to sliding connection, so set up, shift fork 55 is in moving member 51 top because of having the relation of connection can not be because of the dead weight to the position of moving member 51 below with the mounting, has further made things convenient for the position change operation to moving member 51.

More specifically, the fixing member can be selectively set as the straight rod 9, and the middle part of the handle part of the shifting fork 55 is connected with the pin shaft of the straight rod 9, so that when thrust is applied to the tail end of the handle part of the shifting fork 55, the shifting fork 55 can drive the moving member 51 to move.

It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments. The utility model provides a plurality of schemes contain the basic scheme of itself, mutual independence to restrict each other, but it also can combine each other under the condition of not conflicting, reaches a plurality of effects and realizes jointly.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. The utility model provides a scrape chain tightening device of trigger, sets up in the mining reduction gear place side of scraping the trigger, its characterized in that includes:

a shell (1) fixed on the scraper machine relatively;

the rocking handle (2) is arranged on the shell (1), and the rocking handle (2) can be stressed and rotates relative to the shell (1);

the output shaft (3) is arranged on the shell (1) and is in transmission connection with the rocking handle (2), the output shaft (3) rotates by taking the axis of the output shaft as a shaft, and the axis of the output shaft (3) is superposed with the axis of a second input shaft (4) of the mining speed reducer;

the brake mechanism is used for fixing the position of the rocking handle (2);

and the clutch mechanism (5) is used for enabling the output shaft (3) to be connected with or separated from the second input shaft (4) of the mining speed reducer, when the clutch mechanism (5) is in a first state, the output shaft (3) is in transmission connection with the second input shaft (4) of the mining speed reducer, and when the clutch mechanism (5) is in a second state, the output shaft is disconnected with the second input shaft (4) of the mining speed reducer.

2. The chain tightener of a scraper conveyor as claimed in claim 1, characterized in that said clutch mechanism (5) comprises a mobile element (51) which can be keyed to both said output shaft (3) and to the second input shaft (4) of the mining decelerator, the movement positions of said mobile element (51) comprising a first position and a second position, said clutch mechanism (5) being in the first condition when said mobile element (51) is in the first position, and said clutch mechanism (5) being in the second condition when said mobile element (51) is in the second position.

3. The chain tensioner of a scraper machine as claimed in claim 2, characterized in that said clutch mechanism (5) further comprises a first external spline (52) provided on said output shaft (3) and a second external spline (53) provided on the second input shaft (4) of the mining reducer, the moving piece (51) is sleeved on the first external spline (52) and the second external spline (53) in the circumferential direction, and the inner side wall of the moving piece (51) is provided with key teeth (56) which can be engaged with the first external spline (52) and the second external spline (53), when the moving piece (51) is positioned at the first position, the moving piece (51) is meshed with the first external spline (52) and the second external spline (53), when the moving piece (51) is located at the second position, the moving piece (51) is far away from the first external spline (52) or the second external spline (53) to be in a non-connection relation.

4. The chain tensioner of claim 3, characterized in that the outer side wall of said mobile element (51) is provided with a groove (54), said groove (54) surrounding the outer side wall of said mobile element (51).

5. The chain tensioner of claim 4, further comprising a fork (55) for controlling the movement of said mobile element (51) between the first position and the second position, the arc-shaped mouth of said fork (55) being able to be inserted in said groove (54).

6. The chain tensioner as claimed in claim 5, characterized in that said moving member (51) comprises an inner cylinder (511) and an outer cylinder (512) disposed circumferentially around said inner cylinder (511), a plurality of balls (513) being disposed between said inner cylinder (511) and said outer cylinder (512) to allow said inner cylinder (511) to rotate relative to said outer cylinder (512), said splines (56) being disposed on an inner side wall of said inner cylinder (511), said grooves (54) being disposed on an outer side wall of said outer cylinder (512), and said forks (55) being disposed in said grooves (54).

7. A chain tensioner as claimed in claim 1, characterized in that said braking means comprise a ratchet (6) fixed with respect to said handle (2), a pawl (7) rotatably connected to said housing (1).

8. A chain tensioner as claimed in claim 7, characterized in that said pawl (7) is provided with compression springs (8) to press said pawl (7) in the ratchet teeth of said ratchet wheel (6).

9. The chain tensioner of claim 6, further comprising a fixing member fixed to the housing (1) and to which the shank of the fork (55) is rotatably connected.

10. The chain tightener of a scraper conveyor as claimed in claim 9, characterized in that said fixed element is a straight rod (9), the middle of the shank of said fork (55) is pin-jointed to said straight rod (9), said fork (55) drives said moving element (51) to move when the end of the shank of said fork (55) is stressed.

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