CN204980078U - A holdback for belt conveyer - Google Patents
A holdback for belt conveyer Download PDFInfo
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- CN204980078U CN204980078U CN201520278819.4U CN201520278819U CN204980078U CN 204980078 U CN204980078 U CN 204980078U CN 201520278819 U CN201520278819 U CN 201520278819U CN 204980078 U CN204980078 U CN 204980078U
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- unidirectional tooth
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Abstract
The utility model discloses a holdback for belt conveyer belongs to the mechanical technical field of transmission. The holdback includes: the single gear ratchet, the band pulley, a plurality of wedging mechanisms and a plurality of detent mechanism, be equipped with the centre bore on the band pulley, the single gear ratchet locate in the centre bore and with the coaxial setting of band pulley, a plurality of first recesses have been seted up on the lateral wall of centre bore, be equipped with a wedging mechanism in every first recess, the detent mechanism is installed on the terminal surface of band pulley, be equipped with a plurality of single gear on the outer circumference of single gear ratchet, form the tooth's socket between adjacent single gear's the flank of tooth and the back of tooth, be equipped with the complex second recess with wedging mechanism on single gear's the flank of tooth. The utility model provides a holdback can prevent not only that the belt conveyer from taking place upside down phenomenon, reacts rapidly when just preventing upside down, and stopping distance is short, and the while can prevent also that the belt conveyer from taking place to arrange smooth phenomenon, and in addition, this holdback can also replace the driven cylinder in the current belt conveyer, and then the structure of simplification belt conveyer.
Description
Technical field
The utility model relates to transmit machine technical field, particularly a kind of holdback for belt conveyor.
Background technology
Belt conveyor is a kind of by friction-driven and the machinery of transported material in a continuous manner.Primarily of compositions such as frame, transport tape, head roll, follower rollers, actuating devices, it is widely used in all trades and professions such as household electrical appliances, electronics, electrical equipment, machinery, tobacco, injection moulding, post and telecommunications, printing, food, the assembling of object, detection, debugging, packaging and transport etc.
In belt conveyor normal transport material process, if transport tape angle of inclination is excessive, conveyer may be made when stopping transmission, and material drives transport tape counter motion, and reversing phenomenon occurs conveyer; If conveyer speed of transmission is too fast, conveyer may be made when stopping transmission, material drives transport tape to continue to move along former direction, and smooth phenomenon occurs conveyer.In order to prevent above-mentioned reversing and smooth phenomenon, conveyer generally can install holdback and drg.
But existing holdback (comprising: belt holdback, roller and special-shaped block formula holdback) is when preventing conveyer from reversing occurring, and have one section of stopping distance, stop speed of response is slow.And existing holdback does not have the function of drg simultaneously, can not prevent conveyer from smooth phenomenon occurring simultaneously.
Summary of the invention
The utility model embodiment provides a kind of holdback for belt conveyor, can solve existing holdback stop distance and can not substitute drg to the problem preventing belt conveyor from smooth phenomenon occurring when preventing belt conveyor from reversing.Described technical scheme is as follows:
On the one hand, provide a kind of holdback for belt conveyor, described holdback comprises: unidirectional tooth papillae wheel, belt wheel, multiple wedging mechanism and multiple detent mechanism,
Described belt wheel is provided with centre hole, described unidirectional tooth papillae is taken turns and is located in described centre hole and coaxially arranges with described belt wheel, and the excircle of described unidirectional tooth papillae wheel is provided with multiple unidirectional tooth, and each described unidirectional tooth comprises the flank of tooth and the back of tooth, teeth groove is formed between the adjacent described flank of tooth and the described back of tooth
The sidewall of described centre hole offers multiple first groove, a described wedging mechanism is provided with in each described first groove, each described wedging mechanism comprises: the wedge being arranged on the first clamping element in described first groove and being inserted in described first groove, one end of described wedge is connected with described first clamping element, the other end of described wedge stretches out described first groove and offseting of taking turns with described unidirectional tooth papillae
When described belt wheel rotates forward, the other end of described wedge coordinates with the flank of tooth of described unidirectional tooth, when described belt wheel rotates backward, and the other end of described wedge and described tooth socket fit,
Described belt wheel is stretched out at one end or the two ends of described unidirectional tooth papillae wheel, described detent mechanism is arranged on the end face having described unidirectional tooth papillae to take turns to stretch out of described belt wheel, each described detent mechanism comprises: ratchet, ratchet controller and the second clamping element with the supporting installation of described ratchet, on the rotatable end face being arranged on described belt wheel in one end of described ratchet, the end face that described ratchet controller is arranged on described belt wheel is arranged in the rotational trajectory of described ratchet, the flank of tooth of described unidirectional tooth is provided with the second groove coordinated with the other end of described ratchet
When described belt conveyor does not work, the other end of described ratchet is arranged in described second groove, and when described belt conveyor work, the other end of described ratchet is taken turns with described unidirectional tooth papillae and is separated.
Particularly, the profile of tooth of the unidirectional tooth of described unidirectional tooth papillae wheel be asymmetric triangle, asymmetric circular arc and asymmetric trapezoidal in any one.
Further, when the profile of tooth of the unidirectional tooth of described unidirectional tooth papillae wheel is asymmetric triangle, in the triangular-section of described unidirectional tooth, the length of side of flank of tooth correspondence in described triangular-section of described unidirectional tooth is greater than the length of side of the correspondence of the back of tooth in described triangular-section of described unidirectional tooth, and the described flank of tooth is provided with the second groove with the one end fits of described ratchet.
Particularly, described second clamping element is any one in Compress Spring, elastic ejector pin and torsion spring.
Further, when described second clamping element be Compress Spring or elastic ejector pin time, one end of described second clamping element and described ratchet are fixedly connected with away from one end of centre of gration and the other end is fixedly connected with described ratchet controller;
When described second clamping element is torsion spring, described second clamping element is arranged on described ratchet one end near centre of gration.
Further, described ratchet controller is electromagnet sucker, and described ratchet is iron ratchet.
Further, described second groove is only located at described unidirectional tooth papillae wheel and stretches out on the flank of tooth at the position of described belt wheel, or is located on the flank of tooth of whole described unidirectional tooth papillae wheel.
Further, the number of teeth of the unidirectional tooth of described unidirectional tooth papillae wheel is 8 ~ 30, and the number of described wedging mechanism is 8 ~ 30.
Further, the surface of described belt wheel is provided with friction layer.
Further, one end of described ratchet is by the rotatable end face being arranged on described belt wheel of pin.
The beneficial effect that the technical scheme that the utility model embodiment provides is brought is:
By the holdback be made up of unidirectional tooth papillae wheel, belt wheel and multiple wedging mechanism, make this holdback when being applied in belt conveyor, can prevent belt conveyor from occurring reversing phenomenon, particularly, when the normal operative orientation of belt wheel rotates, wedge stretch out the unidirectional tooth flank of tooth that one end of the first groove and unidirectional tooth papillae take turns keep in touch and not with tooth socket fit, make wedge normally can slip over the flank of tooth of unidirectional tooth and not affect the normal rotation of belt wheel; When there is reversing in belt wheel, wedge stretches out one end and the tooth socket fit of the first groove, wedge is made to stop rapidly reversing, belt wheel also stops reversing thereupon, and then make belt conveyor stop reversing, and this holdback adopts multiple wedging mechanism and tooth socket fit, makes this holdback when preventing reversing, reaction is rapider, and stop distance is shorter.Simultaneously, holdback sets up detent mechanism on the end face of belt wheel, makes this holdback can also prevent belt conveyor from occurring smooth phenomenon, particularly simultaneously, one end of ratchet is rotatable to be arranged on the end face of belt wheel, and ratchet controller is arranged in the rotational trajectory of ratchet.When belt conveyor works, ratchet controller controls ratchet, ratchet to be contacted with ratchet controller away from one end of centre of gration and not with the second groove fit, and then make detent mechanism not hinder the normal work of belt conveyor; When belt conveyor does not work, ratchet controller also quits work, under the effect of the second clamping element, ratchet, away from one end of centre of gration and the second groove fit, makes belt wheel stop operating, and then belt conveyor stops smooth, and this holdback adopts multiple detent mechanism and the second groove fit, make this holdback when preventing smooth, reaction is rapider, and stop distance is shorter.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of a kind of belt conveyor that the utility model embodiment one provides;
Fig. 2 is the cross section structure schematic diagram of a kind of holdback that the utility model embodiment one provides;
Fig. 3 is a kind of profile of tooth schematic diagram of the unidirectional tooth that the utility model embodiment one provides;
Fig. 4 is the Facad structure schematic diagram of a kind of holdback that the utility model embodiment one provides;
Fig. 5 is the structural representation of the detent mechanism of a kind of holdback that the utility model embodiment one provides;
Fig. 6 is the another kind of profile of tooth schematic diagram of the unidirectional tooth that the utility model embodiment one provides;
Fig. 7 is another the profile of tooth schematic diagram of the unidirectional tooth that the utility model embodiment one provides;
Fig. 8 is the structural representation of the wedging mechanism of a kind of holdback that the utility model embodiment one provides.
Detailed description of the invention
For making the purpose of this utility model, technical scheme and advantage clearly, below in conjunction with accompanying drawing, the utility model embodiment is described in further detail.
For the ease of understanding the holdback in the utility model, first briefly introducing holdback and being applied to scene in belt conveyor.See Fig. 1, this belt conveyor comprises: frame 100, transport tape 200, actuating device 300, the holdback 500 being arranged on the head roll 400 on the axle drive shaft of actuating device 300 and being fixedly mounted in frame 100, and the two ends of this transport tape 200 are arranged on head roll 400 and holdback 500 respectively.When conveyer normal operation, actuating device 300 drives head roll 400, and head roll 400 drives transport tape 200 to rotate, and holdback 500 replaces the follower rollers in existing conveyer, rotates under the drive of transport tape 200.When center shaft higher than head roll 400 of the center shaft of holdback 500, this belt conveyor can be called as inclination angle belt conveyor.
Embodiment one
The utility model embodiment provides a kind of holdback for belt conveyor, is specially adapted to large-tip angle and belt conveyer, and see Fig. 2, this holdback comprises: unidirectional tooth papillae wheel 1, belt wheel 2 and multiple wedging mechanism 21.
Wherein, belt wheel 2 is provided with centre hole 2a, and unidirectional tooth papillae wheel 1 to be located in centre hole 2a and coaxially to be arranged with belt wheel 2.Composition graphs 3, the excircle of unidirectional tooth papillae wheel 1 is provided with multiple unidirectional tooth 11, and each unidirectional tooth 11 comprises the flank of tooth 111 and the back of tooth 112, forms teeth groove 12 between the adjacent flank of tooth 111 and the back of tooth 112.
The sidewall of centre hole 2a offers multiple first groove 23, in each first groove 23, be provided with a wedging mechanism 21.Each wedging mechanism 21 comprises: the wedge 212 being arranged on the first clamping element 211 in the first groove 23 and being inserted in the first groove 23, one end of wedge 212 is connected with the first clamping element 211, the other end of wedge 212 stretches out the first groove 23 and takes turns 1 with unidirectional tooth papillae and offsets, and lozenges and the flank of tooth 111 of wedge 212 match.
When belt wheel 2 rotates forward, the other end of wedge 212 coordinates with the flank of tooth 111 of unidirectional tooth 11, and when belt wheel 2 rotates backward, the other end of wedge 212 coordinates with teeth groove 12.
See Fig. 4, this holdback also comprises multiple detent mechanism 22, composition graphs 2, belt wheel 2 is stretched out (in other embodiments in the two ends of unidirectional tooth papillae wheel 1, unidirectional tooth papillae wheel 1 also can only have one end to stretch out belt wheel 2), detent mechanism 22 is arranged on (in other embodiments, if ratchet ratchet 1 only has one end to stretch out belt wheel 2, then detent mechanism 22 is arranged on the end face having unidirectional tooth papillae wheel 1 to stretch out of belt wheel 2) on the end face of belt wheel 2.
See Fig. 5, each detent mechanism 22 comprises: ratchet 221, ratchet controller 222 and the second clamping element 223 with the supporting installation of ratchet 221, on the rotatable end face being arranged on belt wheel 2 in one end of ratchet 221, the end face that ratchet controller 222 is arranged on belt wheel 2 is arranged in the rotational trajectory of ratchet 221, and the flank of tooth 111 of unidirectional tooth 11 is provided with the second groove 13 (the second groove 13 can be arranged on any position on the flank of tooth 111) coordinated with the other end of ratchet 221.
When belt conveyor does not work, the other end of ratchet 221 is arranged in the second groove 13, and when belt conveyor works, the other end and the unidirectional tooth papillae of ratchet 221 are taken turns 1 and be separated.
It should be noted that, the first clamping element 211 acts on and compresses wedge 212, keeps offseting with the flank of tooth 111 of unidirectional tooth 11 with the one end making wedge 212 stretch out the first groove 23.Second clamping element 223 acts on and compresses ratchet 221, keeps offseting with the flank of tooth 111 of unidirectional tooth 11 and coordinating with the second groove 13 away from one end of centre of gration to make ratchet 221.
It should be noted that, when the application of this holdback is with belt conveyor, the two ends of unidirectional tooth papillae wheel 1 are fixed in frame 100, and one end of transport tape 200 is arranged on head roll 400, and the other end of transport tape 200 is arranged on belt wheel 2.When belt conveyor normally works, the belt wheel 2 of holdback can move along transport tape 200, can be used for replacing follower rollers of the prior art.In addition, ratchet controller 222 is electrically connected with the actuating device 300 of belt conveyor, and ratchet controller 222 is synchronoused working with actuating device 300, namely actuating device 300 be energized work time, ratchet controller 222 is energized work; When actuating device 300 power-off does not work, ratchet controller 222 also power-off does not work.
In the present embodiment, when belt conveyor normally works, belt wheel 2 drives wedge 212 to rotate forward, the flank of tooth 111 that the unidirectional tooth 11 of 1 can be taken turns with unidirectional tooth papillae in one end that wedge 212 stretches out the first groove 23 is kept in touch and slides on the flank of tooth 111, but the obstruction of the back of tooth 112 of unidirectional tooth 11 can not be subject to, namely can not coordinate with teeth groove 12, such wedging mechanism 21 can not hinder the normal work of belt conveyor.
When there is reversing phenomenon in belt conveyor, belt wheel 2 drives wedge 212 to rotate backward, now, one end that wedge 212 stretches out the first groove 23 can coordinate with teeth groove 12 rapidly and be subject to the obstruction of the back of tooth 112 of unidirectional tooth 11, make wedge 212 stop rotating backward, and then make belt conveyor stop rapidly reversing.In addition, this holdback adopts multiple wedging mechanism 21 to coordinate with teeth groove 12, can make like this teeth groove 12 unidirectional tooth papillae wheel 1 reverse more low-angle time, just matching with wedging mechanism 21, making this holdback when preventing reversing, reaction is rapider, and stop is apart from shorter.
In the present embodiment, on the rotatable end face being arranged on belt wheel 2 in one end of ratchet 221, the ratchet controller 222 be electrically connected with actuating device 300 is arranged in the rotational trajectory of ratchet 221.When actuating device 300 normally works (when belt conveyor normally works), ratchet controller 222 controls ratchet 221, make the other end of ratchet 221 (namely away from one end of centre of gration) contact with ratchet controller 222 and not coordinate with the second groove 13, such detent mechanism 22 would not hinder the normal of belt conveyor to work.
When actuating device 300 does not work (when belt conveyor does not work), ratchet controller 222 does not also work simultaneously, now, ratchet 221 is under the effect of the second clamping element 223, its one end away from centre of gration coordinates with the second groove 13, belt wheel 2 is stopped operating with under the cooperation of the second groove 13 at detent mechanism 22, and then makes belt conveyor, after quitting work, smooth phenomenon can not occur.In addition, this holdback adopts multiple detent mechanism 22 to coordinate with the second groove 11, can make like this second groove 11 unidirectional tooth papillae wheel 1 reverse more low-angle time, just match with detent mechanism 22, make this holdback when preventing smooth, reaction is rapider, and stopping distance is shorter.
Particularly, see Fig. 3, Fig. 6 and Fig. 7, the profile of tooth of the unidirectional tooth 11 of unidirectional tooth papillae wheel 1 can be asymmetric triangle, asymmetric circular arc and asymmetric trapezoidal in any one.
Further, see Fig. 8, when the profile of tooth of the unidirectional tooth 11 of unidirectional tooth papillae wheel 1 is asymmetric triangle, in the triangular-section of unidirectional tooth 11, the length of side of the flank of tooth 111 correspondence in this triangular-section of unidirectional tooth 11 is greater than the length of side of the back of tooth 112 correspondence in this triangular-section of unidirectional tooth 11, form teeth groove 12 between the adjacent flank of tooth 111 and the back of tooth 112, the flank of tooth is provided with the second groove 13 with the one end fits of ratchet 221.
In the present embodiment, unidirectional tooth papillae wheel 1 is external toothing formula ratchet, and the processing of such holdback, installation and maintenance are all very convenient.
Particularly, the second clamping element 223 can be any one in Compress Spring, elastic ejector pin and torsion spring.
Further, see Fig. 4, when the second clamping element 223 be Compress Spring or elastic ejector pin time, one end of the second clamping element 223 and ratchet 221 are fixedly connected with away from one end of centre of gration and the other end is fixedly connected with ratchet controller 222;
When the second clamping element 223 is torsion spring, the second clamping element 223 is arranged on ratchet 221 one end near centre of gration.
Particularly, ratchet controller 222 can be electromagnet sucker, and ratchet 221 can be iron ratchet (in other embodiments, ratchet 221 also can be one end ratchet made of iron, and this one end is ratchet 221 one end away from its centre of gration).
When belt conveyor works, ratchet 221 contacts with ratchet controller 222 away from one end of centre of gration, and when belt conveyor does not work, ratchet 221 coordinates with the second groove 13 away from one end of centre of gration.
In the present embodiment, ratchet controller 222 can be electromagnet sucker, ratchet 221 adopts iron content material to make, ratchet controller 222 is electrically connected with actuating device 300, and keep synchronousing working with it, like this, when actuating device 300 works, ratchet controller 222 can adsorb ratchet 221, and ratchet 221 is not coordinated with the second groove 13; When actuating device 300 does not work, ratchet controller 222 stops absorption ratchet 221, and ratchet 221, under the effect of the second clamping element 223, coordinates with the second groove 13.
Further, the first clamping element 211 can be Compress Spring or elastic ejector pin.
In the present embodiment, the drive side that the first clamping element 211 may be used for wedge 212 and unidirectional tooth papillae take turnss 1 is kept in touch, and makes when belt wheel 2 reverses, and the unidirectional tooth that unidirectional tooth papillae takes turns 1 can hinder rapidly wedge 212 to reverse.
Further, the second groove 11 only can be located at unidirectional tooth papillae wheel 1 and stretch out on the flank of tooth 111 at the position of belt wheel 2, or is located on the flank of tooth 111 of whole unidirectional tooth papillae wheel 1.
In the present embodiment, the second groove 11 is only located at unidirectional tooth papillae wheel 1 and stretches out on the flank of tooth 111 at the position of belt wheel 2, can reduce the processing capacity to unidirectional tooth papillae wheel 1.Second groove 11 is located on the flank of tooth 111 of whole unidirectional tooth papillae wheel 1, can reduce the processing technology complexity to unidirectional tooth papillae wheel 1.In actual applications, the above-mentioned work mode adding the second groove 11 can be selected according to the actual requirements, do not limit here.
Further, the number of teeth of the unidirectional tooth 11 of unidirectional tooth papillae wheel 1 is 8 ~ 30, and the number of wedging mechanism 21 is 8 ~ 30.
In the present embodiment, when designing the number of teeth of unidirectional tooth 11 of unidirectional tooth papillae wheel 1, increase the loading strength that the number of teeth can strengthen unidirectional tooth papillae wheel 1, but the number of teeth of unidirectional tooth papillae wheel 1 too much can affect the strength of gear teeth of unidirectional tooth papillae wheel 1, therefore can consider to select the large number of teeth in above-mentioned scope.And the number of wedging mechanism 21 is more, holdback is rapider when preventing reversing, and the load-carrying capacity of holdback is stronger, but the maximum number of wedging mechanism 21 can not exceed the number of teeth of unidirectional tooth papillae wheel 1.
Further, the surface of belt wheel 2 is provided with friction layer.
In the present embodiment, belt wheel 2 can replace the follower rollers in existing belt conveyor, sets up friction layer on belt wheel 2 surface, and the friction force between belt wheel 2 and transport tape 200 can be made to increase, and then when belt wheel 2 stops operating, transport tape 200 also can stop motion rapidly.In actual applications, friction layer can establish textured rubber for surface.
Further, one end of ratchet 221 can by the rotatable end face being arranged on belt wheel 2 of pin 224.
Below in conjunction with accompanying drawing, the principle of work of brief description once this holdback.
In the present embodiment, when only conveyer normally works as taped, left-hand revolution is that example illustrates, in other embodiments, also can be clickwise when belt conveyor normally works.
When belt conveyor normally works, ratchet controller 222 is also energized work, and controls ratchet 221, contacts with ratchet controller 222 to make one end away from centre of gration of ratchet 221, and do not coordinate with the second groove 11, such detent mechanism 22 can not affect the normal work of belt conveyor.Simultaneously, transport tape 200 can be with movable belt pulley 2 left-hand revolution, one end that wedge 212 stretches out the first groove 23 slips over the flank of tooth 111 that unidirectional tooth papillae takes turns the unidirectional tooth 11 of 1, and is not subject to the obstruction of the back of tooth 112, and wedging mechanism 21 equally also can not affect the normal work of belt conveyor.Now, holdback replaces the follower rollers work in existing belt conveyor.
When actuating device 300 quits work (when namely belt conveyor quits work), on transport tape 200 still load have goods and the speed of transmission of goods is very fast time, goods due to inertia can continue transmission direction keep motion, and then drive transport tape 200 to move, make belt conveyor there will be smooth phenomenon.Now, when actuating device 300 quits work, ratchet controller 222 also power-off quits work, ratchet controller 222 stops controlling ratchet 221, and ratchet 221 is under the effect of the second clamping element 223, and ratchet 221 coordinates with the second groove 11 away from one end of centre of gration, under coordinate of ratchet 221 with the second groove 11, belt wheel 2 stops operating rapidly, drive transport tape 200 to stop operating, and then it is smooth that belt conveyor is stopped rapidly simultaneously.
When actuating device 300 quits work (when namely belt conveyor quits work), on transport tape 200 still load have goods and the angle of inclination of transport tape 200 is larger time, goods is under the effect of self gravitation, move in the direction started along holdback to head roll 400, drive transport tape 200 reverse transfer simultaneously, and then band movable belt pulley 2 reverses, cause belt conveyor and reversing phenomenon occurs.Now, when belt wheel 2 reverses (namely rotating clockwise), one end that wedge 212 stretches out the first groove 23 coordinates with the teeth groove 12 that unidirectional tooth papillae takes turns 1, hinder wedging mechanism 21 to reverse, and then also prevent belt wheel 2 to reverse, such wedging mechanism 21 and unidirectional tooth papillae are taken turns 1 and are coordinated, and have prevented rapidly the reversing of belt conveyor.
In sum, when belt conveyor normally works, this holdback can not hinder belt conveyor normal operation, and can replace follower rollers work.When belt conveyor quits work, the wedging mechanism 21 of holdback can prevent rapidly the reversing phenomenon of belt conveyor, and the detent mechanism 22 of holdback can prevent rapidly the smooth phenomenon of belt conveyor.
The holdback of the utility model embodiment by being made up of unidirectional tooth papillae wheel, belt wheel and multiple wedging mechanism, make this holdback when being applied in belt conveyor, can prevent belt conveyor from occurring reversing phenomenon, particularly, when the normal operative orientation of belt wheel rotates, wedge stretch out the unidirectional tooth flank of tooth that one end of the first groove and unidirectional tooth papillae take turns keep in touch and not with tooth socket fit, make wedge normally can slip over the flank of tooth of unidirectional tooth and not affect the normal rotation of belt wheel; When there is reversing in belt wheel, wedge stretches out one end and the tooth socket fit of the first groove, wedge is made to stop rapidly reversing, belt wheel also stops reversing thereupon, and then make belt conveyor stop reversing, and this holdback adopts multiple wedging mechanism and tooth socket fit, makes this holdback when preventing reversing, reaction is rapider, and stop distance is shorter.Simultaneously, holdback sets up detent mechanism on the end face of belt wheel, makes this holdback can also prevent belt conveyor from occurring smooth phenomenon, particularly simultaneously, one end of ratchet is rotatable to be arranged on the end face of belt wheel, and ratchet controller is arranged in the rotational trajectory of ratchet.When belt conveyor works, ratchet controller controls ratchet, ratchet to be contacted with ratchet controller away from one end of centre of gration and not with the second groove fit, and then make detent mechanism not hinder the normal work of belt conveyor; When belt conveyor does not work, ratchet controller also quits work, under the effect of the second clamping element, ratchet, away from one end of centre of gration and the second groove fit, makes belt wheel stop operating, and then belt conveyor stops smooth, and this holdback adopts multiple detent mechanism and the second groove fit, make this holdback when preventing smooth, reaction is rapider, and stop distance is shorter.In addition, be arranged on respectively on holdback and head roll by the two ends of the transport tape by belt conveyor, make the follower rollers that holdback can replace in existing belt conveyor, and then can belt conveyor be simplified.And this backstop is simple, easy to assembly, is suitable for large-scale promotion.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (10)
1. for a holdback for belt conveyor, it is characterized in that, described holdback comprises: unidirectional tooth papillae wheel (1), belt wheel (2), multiple wedging mechanism (21) and multiple detent mechanism (22),
Described belt wheel (2) is provided with centre hole (2a), described unidirectional tooth papillae wheel (1) to be located in described centre hole (2a) and coaxially to be arranged with described belt wheel (2), the excircle of described unidirectional tooth papillae wheel (1) is provided with multiple unidirectional tooth (11), each described unidirectional tooth (11) comprises the flank of tooth (111) and the back of tooth (112), teeth groove (12) is formed between the adjacent described flank of tooth (111) and the described back of tooth (112)
The sidewall of described centre hole (2a) offers multiple first groove (23), a described wedging mechanism (21) is provided with in each described first groove (23), each described wedging mechanism (21) comprising: the wedge (212) being arranged on the first clamping element (211) in described first groove (23) and being inserted in described first groove (23), one end of described wedge (212) is connected with described first clamping element (211), the other end of described wedge (212) stretches out described first groove (23) and takes turns offseting of (1) with described unidirectional tooth papillae,
When described belt wheel (2) rotates forward, the other end of described wedge (212) coordinates with the flank of tooth (111) of described unidirectional tooth (11), when described belt wheel (2) rotates backward, the other end of described wedge (212) coordinates with described teeth groove (12)
Described belt wheel (2) is stretched out at one end or the two ends of described unidirectional tooth papillae wheel (1), described detent mechanism (22) is arranged on the end face having described unidirectional tooth papillae wheel (1) to stretch out of described belt wheel (2), each described detent mechanism (22) comprising: ratchet (221), ratchet controller (222), and with second clamping element (223) of described ratchet (221) supporting installation, on the rotatable end face being arranged on described belt wheel (2) in one end of described ratchet (221), the end face that described ratchet controller (222) is arranged on described belt wheel (2) is arranged in the rotational trajectory of described ratchet (221), the flank of tooth (111) of described unidirectional tooth (11) is provided with the second groove (13) coordinated with the other end of described ratchet (221),
When described belt conveyor does not work, the other end of described ratchet (221) is arranged in described second groove (13), when described belt conveyor work, the other end of described ratchet (221) is taken turns (1) with described unidirectional tooth papillae and is separated.
2. holdback according to claim 1, is characterized in that, the profile of tooth of the unidirectional tooth (11) of described unidirectional tooth papillae wheel (1) be asymmetric triangle, asymmetric circular arc and asymmetric trapezoidal in any one.
3. holdback according to claim 2, it is characterized in that, when the profile of tooth of the unidirectional tooth (11) of described unidirectional tooth papillae wheel (1) is asymmetric triangle, in the triangular-section of described unidirectional tooth (11), the length of side of the flank of tooth (111) correspondence in described triangular-section of described unidirectional tooth (11) is greater than the length of side of the back of tooth (112) correspondence in described triangular-section of described unidirectional tooth (11), and the described flank of tooth (111) is provided with the second groove (13) with the one end fits of described ratchet (221).
4. holdback according to claim 1, is characterized in that, described second clamping element (223) is Compress Spring, in elastic ejector pin and torsion spring any one.
5. holdback according to claim 4, is characterized in that,
When described second clamping element (223) is for Compress Spring or elastic ejector pin, one end of described second clamping element (223) and described ratchet (221) are fixedly connected with away from one end of centre of gration and the other end is fixedly connected with described ratchet controller (222);
When described second clamping element (223) is for torsion spring, described second clamping element (223) is arranged on described ratchet (221) one end near centre of gration.
6. the holdback according to any one of claim 1-5, is characterized in that, described ratchet controller (222) is electromagnet sucker, and described ratchet (221) is iron ratchet.
7. the holdback according to any one of claim 1-5, it is characterized in that, described second groove (11) is only located at described unidirectional tooth papillae wheel (1) and stretches out on the flank of tooth (111) at the position of described belt wheel (2), or is located on the flank of tooth (111) of whole described unidirectional tooth papillae wheel (1).
8. the holdback according to any one of claim 1-5, is characterized in that, the number of teeth of the unidirectional tooth (11) of described unidirectional tooth papillae wheel (1) is 8 ~ 30, and the number of described wedging mechanism (21) is 8 ~ 30.
9. the holdback according to any one of claim 1-5, is characterized in that, the surface of described belt wheel (2) is provided with friction layer.
10. the holdback according to any one of claim 1-5, is characterized in that, one end of described ratchet (221) is by the rotatable end face being arranged on described belt wheel (2) of pin (224).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520278819.4U CN204980078U (en) | 2015-04-30 | 2015-04-30 | A holdback for belt conveyer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520278819.4U CN204980078U (en) | 2015-04-30 | 2015-04-30 | A holdback for belt conveyer |
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| Publication Number | Publication Date |
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| CN204980078U true CN204980078U (en) | 2016-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520278819.4U Withdrawn - After Issue CN204980078U (en) | 2015-04-30 | 2015-04-30 | A holdback for belt conveyer |
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| Country | Link |
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| CN (1) | CN204980078U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104803152A (en) * | 2015-04-30 | 2015-07-29 | 江汉大学 | Holdback for belt conveyer |
| CN107055362A (en) * | 2017-02-28 | 2017-08-18 | 常熟市安得电力机具制造有限公司 | A kind of tail rope automatic one-way security device |
| CN110239973A (en) * | 2019-07-22 | 2019-09-17 | 中国石油大学胜利学院 | A kind of material-gathering device of agricultural machinery |
| CN111232565A (en) * | 2020-03-09 | 2020-06-05 | 安徽理工大学 | Permanent magnet non-contact type backstop |
-
2015
- 2015-04-30 CN CN201520278819.4U patent/CN204980078U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104803152A (en) * | 2015-04-30 | 2015-07-29 | 江汉大学 | Holdback for belt conveyer |
| CN107055362A (en) * | 2017-02-28 | 2017-08-18 | 常熟市安得电力机具制造有限公司 | A kind of tail rope automatic one-way security device |
| CN110239973A (en) * | 2019-07-22 | 2019-09-17 | 中国石油大学胜利学院 | A kind of material-gathering device of agricultural machinery |
| CN111232565A (en) * | 2020-03-09 | 2020-06-05 | 安徽理工大学 | Permanent magnet non-contact type backstop |
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