CN220115451U - Torsion limiting device for conveyor speed reducing mechanism and conveyor provided with torsion limiting device - Google Patents
Torsion limiting device for conveyor speed reducing mechanism and conveyor provided with torsion limiting device Download PDFInfo
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- CN220115451U CN220115451U CN202321522640.XU CN202321522640U CN220115451U CN 220115451 U CN220115451 U CN 220115451U CN 202321522640 U CN202321522640 U CN 202321522640U CN 220115451 U CN220115451 U CN 220115451U
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- 230000007246 mechanism Effects 0.000 title claims abstract description 71
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- 230000009467 reduction Effects 0.000 claims description 28
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- 239000003638 chemical reducing agent Substances 0.000 description 4
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Abstract
The utility model relates to the technical field of conveying equipment, in particular to a torsion limiting device of a speed reducing mechanism of a conveyor and the conveyor provided with the device, wherein the torsion limiting device comprises a first supporting component, a second supporting component, an elastic telescopic component and an emergency stop component, and the first supporting component is arranged on a shell of the speed reducing mechanism; the second supporting component is fixed on the conveyor bracket; the two ends of the elastic telescopic component are respectively connected with the first supporting component and the second supporting component; the emergency stop assembly is provided with a triggering part and an action part, wherein the triggering part is connected with the second support assembly, and the action part is connected with the first support assembly. Aiming at the defects of friction plate type torsion limiting devices, the utility model adopts the spring type torsion limiting structure to realize the protection of the conveying system, so that the conveying system has safe use conditions, and in the use process, the power supply of the driving device can be cut off in time to ensure the safety of the conveying system under the condition that the load is increased and the output torque of the driving mechanism is increased due to the failure of the conveyor.
Description
Technical Field
The utility model relates to the technical field of conveying equipment, in particular to a torsion limiting device of a conveyor speed reducing mechanism and a conveyor with the device.
Background
The speed reducing mechanism of the conveyor is generally provided with a torsion limiter at its output shaft to achieve protection of the conveyor system in case of motor overload due to anomalies. In the existing chain conveyor, a torsion limiting device arranged at the output shaft of a speed reducer of a driving device usually adopts a friction type torsion limiter, and the torsion limiter protects a power structure and related mechanical structures (mainly mechanical components related to the power structure) on a conveying system from being damaged due to overload in a manner of sliding between friction plates when the conveyor is overloaded, so that system shutdown is avoided.
The conventional friction torque limiter has the following problems:
1) The structure is complex;
2) The friction plate has the problems of easy damage, short service life and inconvenient maintenance and replacement in the use process;
3) The torque limiting parameter is difficult to control accurately;
4) Generally, the alarm function is not provided, so that the early warning can not be timely performed and the problem can be eliminated, or the alarm function is integrated in an electric control system (such as a motor driving circuit) of the conveyor so as to detect operation changes of electric structures such as abnormal power supply of the motor and the like to realize the alarm, and the alarm mechanism is poor in reliability, short in service life and easy to damage in structure.
Disclosure of Invention
The utility model aims to provide a torque limiting device for a conveyor speed reducing mechanism and a conveyor with the torque limiting device, and solve the technical problems.
The technical problems solved by the utility model can be realized by adopting the following technical scheme:
in a first aspect, the present utility model provides a conveyor reduction mechanism torque limiting device comprising:
a first support assembly disposed on and moving with a housing of a reduction mechanism of the conveyor;
the second supporting component is fixed on the bracket of the conveyor;
the elastic telescopic component is connected with the first supporting component at one end and the second supporting component at the other end, and is compressed under the action of the first supporting component moving along with the shell of the speed reducing mechanism;
the emergency stop assembly is provided with a trigger part and an action part, the trigger part is used for generating a stop signal after triggering, the action part is used for triggering the trigger part to generate the stop signal, the trigger part is connected with the second support assembly, and the action part is connected with the first support assembly;
the first support assembly acts with the housing of the reduction mechanism and the second support assembly is disposed on the frame of the conveyor so that it is stationary relative to the first support assembly. When the conveyor works, the output shaft of the speed reducing mechanism generates reaction torque on the speed reducing mechanism in the process of outputting working torque after rotating, so that the shell of the speed reducing mechanism has a trend of reverse rotation, the elastic telescopic assembly realizes force balance between the output shaft and the speed reducing mechanism, and emergency stop and early warning can be realized through the emergency stop assembly under the condition of overload of a motor while the reverse rotation trend is slowed down.
Preferably, the elastic telescopic assembly comprises:
one end of the telescopic rod passes through a through hole in the supporting structure of the first supporting component, and the other end of the telescopic rod is connected with the second supporting component;
the spring is sleeved on the telescopic rod and can freely move along the telescopic rod;
the adjusting piece is adjustably arranged on the telescopic rod, and one end of the adjusting piece is clung to the spring (in some cases, one end of the spring can be connected to the adjusting piece).
In the utility model, the torsion limiting parameter is adjusted by adjusting the expansion and contraction amount of the spring.
Preferably, the first support assembly includes:
the first connecting plate is fixed on the shell of the speed reducing mechanism;
the pressing block is rotationally connected with the first connecting plate;
the pressing block is provided with a through hole, so that one end of the telescopic rod can conveniently pass through the pressing block.
Preferably, the first connection plate includes:
the connecting part is fixed on a shell of the speed reducing mechanism of the conveyor;
the supporting part is connected with the connecting part, and is upwards vertically protruded to form two support ends on the first connecting plate after the connecting part, so that the pressing block can be conveniently connected in a rotating mode.
Preferably, the supporting portion has a rectangular plate structure portion and a triangular plate structure portion, the two structure portions can be integrally formed during forming, and the rectangular plate structure portion and the triangular plate structure portion have a side fixed on the connecting portion. The hypotenuse of triangle structure portion sets up towards second supporting component one side to when first supporting component rotates with reduction gears's casing to second supporting component motion, for first supporting component provides better supporting effect, its effect is the reinforcing plate.
Preferably, the straight line of the rotating shaft of the pressing block during rotation is perpendicular to the straight line of the length direction of the telescopic rod, and the straight line of the rotating shaft of the pressing block during rotation is parallel to the plane of the plate surface of the first connecting plate.
Preferably, the first support assembly includes:
the rotary connecting piece, one end of the rotary connecting piece is fixed in the first connecting plate, and the other end is rotationally connected with the pressing block.
Preferably, the first support assembly includes:
the rotary connecting piece, the one end of rotary connecting piece rotates to be connected first connecting plate, the other end fixed connection briquetting.
Preferably, the second support assembly includes:
a second connecting plate is arranged on the second connecting plate,
and one end of the rocker arm is rotationally connected with the second connecting plate, and the other end of the rocker arm is fixedly connected with the elastic telescopic assembly.
Preferably, the second support assembly includes:
the second connecting plate is connected with the support of the conveyor through the adjusting block so as to enable the second connecting plate to have the function effect of adjusting the height.
Preferably, the emergency stop assembly includes:
a third connecting plate fixed to the first support assembly, the third connecting plate having a waist-shaped hole;
the signal switch is fixed on the second supporting component and locked in the waist-shaped hole;
and one end of the triggering piece is connected with the third connecting plate, and the other end of the triggering piece faces the signal switch.
Preferably, the signal switch may employ a contact type switch-type sensor, such as a travel switch, or a non-contact type switch-type sensor, such as a magnetic induction type proximity switch.
Preferably, the conveyor reduction mechanism torque limiting device comprises at least two elastic telescopic assemblies.
In order to cope with complex and changeable working conditions, the utility model can meet corresponding use requirements by configuring a specific number of elastic telescopic components.
In a second aspect, the utility model provides a conveyor, which comprises a bracket, a motor and a speed reducing mechanism, wherein the motor is connected with the speed reducing mechanism, and an output shaft of the speed reducing mechanism is connected with a conveying belt arranged on the bracket;
the conveyor further comprises a torsion limiting device of the conveyor speed reducing mechanism, which is connected with the speed reducing mechanism and the bracket.
The beneficial effects are that: due to the adoption of the technical scheme, the utility model aims at the defects of friction plate type torsion limiting devices, adopts the spring type torsion limiting structure to realize the protection of the conveying system, so that the conveying system has safe use conditions, and can cut off the power supply of the driving device in time to ensure the safety of the conveying system under the condition that the load is increased and the output torque of the driving mechanism is increased due to the failure of the conveyor in the use process, thereby having the following advantages in summary:
1) Providing an overload alarm function, and reminding the manual intervention in time on the basis of cutting off the action of the conveying system so as to shorten the downtime of the conveying system;
2) The torsion limiting structure is maintenance-free relative to other power structure components in the conveying system;
3) In the whole structural design, the number of vulnerable parts is small, and the problems of misoperation and the like caused by self failure are reduced.
Drawings
FIG. 1 is a schematic view of the torque limiting device of the present utility model assembled with a motor and a reduction mechanism;
FIG. 2 is a schematic view of a conveyor of the present utility model;
FIG. 3 is a first partial schematic view of the structure of FIG. 1;
FIG. 4 is a second partial schematic view of the structure of FIG. 1;
FIG. 5 is a schematic illustration of the structure of FIG. 4 after being subjected to reactive torque;
FIG. 6 is a schematic view of a structure of the first support member in FIG. 1;
FIG. 7 is a top view of the structure of FIG. 6;
FIG. 8 is a schematic view of a construction of the compact of FIG. 1;
fig. 9 is a schematic view of a structure of the rotary joint of fig. 1.
Detailed Description
In order that the manner in which the utility model is practiced, as well as the features and objects and functions thereof, will be readily understood and appreciated, the utility model will be further described in connection with the accompanying drawings. It should be noted that the terms "first," "second," "third," "fourth," and the like in the description and in the claims, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments described herein may be implemented in other sequences than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a product or apparatus that comprises a list of elements or units is not necessarily limited to those elements or units that are expressly listed or inherent to such product or apparatus, but may include other elements or units not expressly listed or inherent to such product or apparatus.
Referring to fig. 1 and 2, an embodiment of the present utility model provides a torsion limiting apparatus for a conveyor reduction mechanism, which includes an elastic expansion assembly 100, a first support assembly 200, a second support assembly 300, and a scram assembly 400, wherein,
the first support assembly 200 is disposed on and moves with a housing 901 of the reduction mechanism 900 of the conveyor;
the second support assembly 300 is fixed to a bracket 800 of the conveyor;
one end of the elastic expansion assembly 100 is connected with the first supporting assembly 200, the other end is connected with the second supporting assembly 300, and the elastic expansion assembly 100 is compressed under the action of the first supporting assembly 200 moving along with the shell 901 of the speed reducing mechanism;
the emergency stop assembly 400 has a triggering portion for generating a stop signal after triggering, and an action portion for triggering the triggering portion to generate the stop signal, wherein the triggering portion is connected to the second support assembly 300, and the action portion is connected to the first support assembly 200.
When the utility model works, the first supporting component acts along with the shell of the speed reducing mechanism, and the second supporting component is arranged on the bracket of the conveyor, so that the second supporting component is fixed relative to the first supporting component. On the basis, when the conveyor works, as shown in fig. 3, the output shaft of the speed reducing mechanism rotates (the illustrated structure rotates anticlockwise) and then outputs working torque M1 (the torque M1 direction is anticlockwise in the illustrated structure), reaction torque M2 (the torque M2 direction is clockwise in the illustrated structure) is generated in the process on the output shaft, so that the shell of the speed reducing mechanism has a tendency of reverse rotation, the elastic telescopic component provides a certain resisting effect to balance the influence of the reaction torque, the tendency of reverse rotation of the shell of the speed reducing mechanism caused by the reaction torque is relieved, and in addition, emergency stop and early warning (for example, an emergency stop signal is simultaneously output to a control system of the conveyor and then an alarm effect is realized through the original alarm function and corresponding devices of the system) can be realized through the emergency stop component under the condition that the overload of the conveyor (motor) occurs.
The utility model can further arrange the elastic telescopic component according to the following structure: in some embodiments, as shown in fig. 1 and 3, the elastic telescopic assembly includes a telescopic rod 101, a spring 102 and an adjusting piece 103, wherein one end of the telescopic rod 101 passes through a through hole (i.e., a through hole 2021 arranged on a pressing block 202 below) on a supporting structure of the first supporting assembly, and the other end is connected with a second supporting assembly (in particular, the second supporting assembly is fixed on a rocker arm of the assembly, and the rocker arm is rotationally connected with another fixed structure of the assembly to cope with the rotation of the first supporting assembly and the elastic telescopic assembly along with the rotation of a housing of the speed reducing mechanism, so that damage caused by structural deformation or influence on telescopic performance is avoided);
the spring 102 is sleeved on the telescopic rod 101 and can freely move along the telescopic rod 101;
the adjusting member 103 is adjustably disposed on the telescopic rod 101, and one end thereof is abutted against the spring 102 (in some cases, one end of the spring 102 may be connected to the adjusting member 103).
In the utility model, the torsion limiting parameter is adjusted by adjusting the expansion and contraction amount of the spring.
It should be noted that the adjustable adjusting member is disposed on the telescopic rod, which means that the adjusting member can be fixed at a certain position of the telescopic rod when not adjusted, and can be moved and fixed at another position after being adjusted.
In some embodiments, as shown in fig. 3, the adjusting member 103 is in a sleeve structure, so that the adjusting member is sleeved on the telescopic rod 101, for realizing the adjusting function, an internal thread can be arranged on the inner pipe wall of the sleeve structure, and an external thread is arranged on the outer wall of the telescopic rod 101 in cooperation with the internal thread, so that the adjusting member 103 is in threaded connection with the telescopic rod 101, and the adjusting member 103 is fixed after being moved to a specific position on the telescopic rod 101 by rotating the adjusting member 103, so as to achieve the purpose of adjusting the telescopic amount of the spring 102.
In this example, the sleeve as the adjusting member may also directly use a nut to achieve the adjusting function.
Alternatively, in this example, as shown in fig. 1 and 3, the inner wall of the sleeve may not be provided with an internal thread, but a nut 104 is fitted to the shaft of the telescopic rod 101 on one side of the sleeve (here, the side not in contact with the spring 102), and the adjusting member 103 is pushed in or pushed out by screwing in or screwing out the nut 104.
In some embodiments, as shown in fig. 1 and 3, the first support assembly includes a first connection plate 201 and a pressing block 202, wherein the first connection plate 201 is fixed to a housing 900 of the reduction mechanism; the pressing block 202 is rotationally connected with the first connecting plate 201;
as shown in fig. 8, the pressing block 202 has a through hole 2021 to facilitate passage of one end of the telescopic rod 101.
In some of these embodiments, as shown in fig. 6 and 7, the first connection plate 201 includes a connection portion 2011 and a support portion 2012, wherein the connection portion 2011 is fixed to the housing 901 of the speed reduction mechanism of the conveyor;
the supporting portion 2012 is connected with the connecting portion 2011, and protrudes upwards and vertically to form two bracket ends on the first connecting plate 201 after the connecting portion 2011, so that the connecting press block can be conveniently rotated.
In this example, the connecting portion 2011 may be configured as a flat plate structure, and after each of four corners thereof is provided with a bolt hole 201101, it is fastened to the housing 901 of the reduction mechanism by a bolt.
In some embodiments, the supporting portion 2012 has a rectangular plate structure portion and a triangular plate structure portion, where the two structure portions may be integrally formed during forming, and one side edge of each of the rectangular plate structure portion and the triangular plate structure portion is fixed on the connecting portion 2011 (in this structure, the triangular plate is connected with a part of the long side structure of the rectangular plate by a right angle edge thereof, and one short side edge of the rectangular plate is fixed downward on the plate surface of the connecting portion 2011, and the other right angle edge of the triangular plate is adjacent to the short side edge and is also fixed on the connecting portion 2011). The hypotenuse of triangle structure portion sets up towards second supporting component one side to when first supporting component rotates with reduction gears's casing to second supporting component motion, provide better supporting effect for first supporting component. Through holes 201201 are formed in the plate structure of the rectangular plate, and are convenient to realize rotary connection with the pressing block.
The utility model can be provided with the pressing blocks according to the following structure, so that the pressing blocks have better extrusion effect on the springs of the elastic telescopic components: in some embodiments, the straight line of the rotating shaft of the pressing block when rotating is perpendicular to the straight line of the length direction of the telescopic rod, and the straight line of the rotating shaft of the pressing block when rotating is parallel to the plane of the plate surface of the first connecting plate. That is, in the process that the first support component rotates along with the shell of the speed reducing mechanism, the pressing block also rotates along a straight line, namely a rotating shaft of the pressing block rotates along the straight line, and when the structure is arranged, the straight line where the rotating shaft is arranged is parallel to the plate surface of the first connecting plate, and the straight line is mutually perpendicular to the extending and contracting direction of the elastic telescopic component at the same time, even if the straight line is perpendicular to the length direction of the telescopic rod. With this configuration, the longitudinal direction of the telescopic rod is also generally parallel to the plate surface (plane) of the first connecting plate.
In the utility model, the rotary connection structure between the first connecting plate and the pressing block can be set according to the following structure: in some embodiments, as shown in fig. 1 and 3, the first support assembly includes a rotary link 203, one end of the rotary link 203 is fixed to the first link plate 201, and the other end is rotatably connected to the pressing block 202.
Specifically, the first connecting plate 201 has two bracket ends (i.e. a supporting portion 2012), the pressing block 202 is erected through the two bracket ends, and the pressing block 202 is supported and is rotatable in cooperation with the rotating connecting piece 203, so that the expansion link 101 is prevented from being deformed and bent through rotation of the pressing block 202 in the process that the first supporting component rotates along with the housing 901 of the speed reducing mechanism, and the spring 102 can also be always extruded frontally.
In this example, a through hole (i.e., a through hole 201201 in the structure shown in fig. 6) may be provided on the bracket end, and an internal thread is provided on the inner wall of the hole; the press block 202 is provided with a blind hole (i.e. a blind hole 2022 in the structure shown in fig. 8), and the inner wall of the hole is smooth; the outer wall of one end of the rotary connector 203 is made smooth (the cross-sectional diameter of the end is smaller than the aperture of the blind hole 2022), and the outer wall of the other end is provided with an external thread (an internal thread corresponding to the through hole 201201 of the bracket end). When the rotary connecting piece 203 is screwed into the through hole 201201 at the bracket end, the smooth end gradually stretches into the blind hole 2022 of the pressing block 202, so that the effect that the rotary connecting piece 203 is fixedly connected with the first connecting plate 201 and is rotationally connected with the pressing block 202 is achieved.
In the utility model, the rotary connection structure between the first connecting plate and the pressing block can be further arranged according to the following structure: in other embodiments, as shown in fig. 1 and 3, the first support assembly includes a rotary connection member 203, where one end of the rotary connection member 203 is rotatably connected to the first connection plate 201, and the other end is fixedly connected to the pressing block 202.
The present example actually improves the above example (i.e., the embodiment in which the rotational connection between the first link plate and the press block is achieved in the foregoing structural arrangement): the bracket end can be provided with a through hole, and the inner wall of the hole is smooth; the pressing block is provided with a blind hole, and the inner wall of the hole is provided with an internal thread; the outer wall of one end of the rotary connecting piece is smooth (the diameter of the cross section of the end is smaller than the aperture of the through hole of the bracket end), and the outer wall of the other end is provided with external threads (corresponding to the internal threads of the blind hole of the pressing block). One end of the rotary connecting piece with external threads penetrates through the through hole of the support end and then is screwed into the blind hole of the pressing block, so that the smooth other end of the rotary connecting piece is left in the through hole, and the effect that the rotary connecting piece is fixedly connected with the first connecting plate and is rotationally connected with the pressing block is achieved.
In the above embodiment of the implementation of the rotational connection structure between the first connection plate and the pressing block, further arrangement may be provided: the end of one end of the rotary connecting piece (the opposite end of the extending direction) is provided with a blocking piece for limiting the extending depth.
As shown in fig. 9, a structure of a rotary connector is shown, the rotary connector has a left portion 2031, a middle portion 2032 and a right portion 2033, the middle portion 2032 is located between the left portion 2031 and the right portion 2033, and the three are sequentially connected together. The maximum width of the left part 2031 is larger than the aperture of the through hole (namely, the through hole 201201) on the bracket end, so that the left part 2031 cannot pass through the through hole and then plays a limiting role; middle portion 2032 remains in the cradle end when right portion 2033 is connected to press 202. The threaded connection with the bracket end can be achieved after the external threads are provided on the middle portion 2032, or the threaded connection with the press block 202 can be achieved after the external threads are provided on the right portion 2033. Fig. 9 shows a configuration in which the outer wall of the middle portion 2032 is provided with external threads 203201.
In some embodiments, as shown in fig. 3, after one end of the telescopic rod 101 passes through the through hole 2021 of the pressing block 202, the telescopic rod 101 may be locked by the nut 105, so that the pressing block 202 can press the spring 102 only to the side of the second support component.
The utility model can be provided with a second supporting component according to the following structure: in some embodiments, as shown in fig. 1 and 3, the second support assembly includes a second connection plate 301 and a rocker arm 302, wherein, in conjunction with fig. 2, the second connection plate 301 is connected to a bracket 800 of the conveyor; one end of the rocker arm 302 is rotatably connected with the second connecting plate 301, and the other end is fixedly connected with the elastic telescopic assembly.
Specifically, one end of the telescopic rod 101 of the elastic telescopic assembly passes through the through hole 2021 (i.e. the through hole 2021 in fig. 7 and 8) on the pressing block 202, and freely stretches through the hole, and the rocker arm 302 is correspondingly provided with a hole structure which is convenient for the other end of the telescopic rod 101 to pass through. For example, the hole on the rocker arm 302 may be a through hole or a blind hole structure, and when the rocker arm is in a through hole structure, after the telescopic rod passes through the through hole, the rod bodies exposed out of the two ends of the through hole are locked with a nut as a fastening structure, so that the rocker arm and the telescopic rod are fixedly connected; or, when the telescopic rod is in a blind hole structure, the inner wall of the blind hole is directly provided with an inner thread, and the inner thread is matched with an outer thread of the outer wall of the end part of the telescopic rod, so that the inner thread and the outer thread are in threaded connection to realize relative fixation.
The rotational connection structure of the swing arm 302 and the second connection plate 301 may be provided with reference to the rotational connection structure of the pressing block and the first connection plate. Fig. 3 shows a rotational connection 3001 of the rocker arm and the second connecting plate.
In some of these embodiments, the second support assembly further comprises an adjustment block 303, the second connection plate 301 being connected to the support 800 of the conveyor by means of the adjustment block 303, so as to have the functional effect of adjusting the height.
The utility model can be provided with the emergency stop component according to the following structure: in some embodiments, as shown in fig. 1, 4 and 5, the scram assembly includes a third connection plate 401, a signal switch 402 and a trigger 403, wherein the third connection plate 401 is fixed on the first support assembly, and the third connection plate 401 has a waist-shaped hole;
the signal switch 402 is fixed on the second support component and locked in the waist-shaped hole;
one end of the trigger member 403 is connected to the third connection plate 401, and the other end faces the signal switch 402.
In this example, the third connection plate 401 and the trigger member 403 are assembled integrally to form an action part of the emergency stop assembly, and when the action part rotates with the first support assembly along with the housing 901 of the speed reducing mechanism, the signal switch 402 is the trigger part of the emergency stop assembly, and generates a stop signal after being triggered by the trigger member 403, where the stop signal is sent to an upper control system (where the upper control system refers to an original control system of the conveyor, and is used for controlling the operation of the conveyor and related electrical structures, for example, a field control system constructed by using a PLC as a control core member, or a control circuit for triggering on-off of a power supply line by using a relay, or a remote computer control system connected by a field bus, etc.), and then performs stop processing and alarm processing.
Specifically, as shown in fig. 1, the triggering element 403 is fixed on the first connecting plate 201 through the third connecting plate 401, and when the triggering element is adjusted to a proper height and then is rotated along with the housing 901 or the first connecting plate 201, the triggering element can just trigger the signal switch 402;
the signal switch 402 may be fixed to the second connection plate 301, to the adjustment block 303, or directly to a bracket of the conveyor.
In this example, the signal switch may employ a contact type switch-type sensor, such as a travel switch, or a non-contact type switch-type sensor, such as a magnetic induction type proximity switch.
Based on the above example, in some embodiments, when the signal switch is a travel switch, the trigger member is a push rod structure, which presses and pushes the push rod of the travel switch in the process of rotating and swinging along with the first support component, and then the push rod generates a stop signal and sends the stop signal upwards;
in other embodiments, when the signal switch is a magnetic induction proximity switch, the triggering member may be a metal plate or a metal block, and the triggering member triggers the signal switch to generate the shutdown signal after the signal switch approaches the magnetic induction proximity switch and enters the sensing area during the swinging process along with the first support component.
When the utility model works, the stress condition is analyzed as follows:
referring to fig. 3, 4 and 5, when the working torque M1 is greater than the reaction torque M2, the elastic telescopic assembly is compressed to the second support assembly side, and the housing of the speed reducing mechanism rotates reversely around the output shaft 902 to generate angular displacement: as shown in fig. 1, 3 and 5, when the pressing block 202 acts with the housing 901 of the speed reducing mechanism, a force F is applied to the spring 102 (for the sake of description, corresponding reference numerals are not made), and the pressing block 202 itself is acted by a restoring force F1 (for the sake of description, corresponding reference numerals are not made) of the spring 102, when the conveying system fails, the working torque M1 output by the force shaft 902 of the speed reducing mechanism increases, and the corresponding reaction torque M2 also increases, and the force F of the pressing block 202 acting on the spring 102 also increases correspondingly, until when F > F1, the spring 102 is compressed, so that the housing 901 of the speed reducing mechanism rotates clockwise around the force shaft 902 and then generates angular displacement;
when the working torque M1 is smaller than the reaction torque M2, the housing 901 of the reduction mechanism is kept stationary.
According to the above analysis, the reaction force F1 generated when the spring 102 receives the force of the pressing block 202 is changed after the adjustment, so that the rotation amplitude and speed of the housing 901 of the speed reducing mechanism can be reduced, and the housing can be rotated under the safe condition until the emergency stop assembly is triggered to generate a stop signal, thereby ensuring the safety of the conveyor.
It should be noted that the emergency stop component of the utility model can be modified based on the original emergency stop circuit of the conveyor. For example, the signal output end of the triggering part of the scram component is connected with the control end of the original scram switch of the conveyor in parallel and then connected into the control circuit, so that the effect that the conveyor can be stopped no matter the triggering signal generated by the scram component or the control signal generated by the scram switch is realized.
Alternatively, in some embodiments, a signal of the trigger portion of the scram assembly may be output to a field control device, such as a PLC, which generates a shutdown control signal to control the conveyor to shutdown.
The working mechanism of the scram assembly of the utility model is as follows: taking the signal switch as a travel switch as an example, the signal switch 402 is connected to the normally-closed contact when in wiring;
when the conveyor is working normally, the normally closed point of the signal switch 402 is on;
when the conveyor breaks down, the working torque M1 increases to enable F to be greater than F1, the shell 901 generates angular displacement to drive the trigger piece 403 to press the signal switch 402, when the angular displacement generated by rotation of the shell 901 reaches a certain angle, the normally closed point of the signal switch 402 is disconnected (namely a stop signal is generated, a PLC (programmable logic controller) or other electrical control structures of the conveyor can be connected, the conveyor can be stopped in an emergency after the motor is powered off after the stop signal is detected by a PLC program or other detection circuits), the conveyor control system cuts off the power supply of the motor, and the conveyor is stopped.
The circuit control system of the conveyor is generally provided with a signal indicating device for emergency stop, and when the emergency stop assembly is triggered to cause the emergency stop of the conveyor, the conveyor can also make the signal indicating device for emergency stop work and then output warning information (for example, a three-color warning lamp module with a buzzer is adopted to carry out audible and visual warning).
It should be noted that, the present utility model only provides a realization basis for outputting the stop signal, but the alarm structure (including the realization structure of the signal indicating device) of the conveyor is not in the protection scope of the present utility model, and the structure of the signal indicating device, the connection with the conveyor control system, the action principle, etc. all belong to the prior art, so the description thereof is omitted.
In addition, in order to cope with complex and changeable working conditions, the utility model can meet corresponding use requirements by configuring a specific number of elastic telescopic components, and can be specifically set according to the following structure: in some embodiments, the conveyor reduction mechanism torque limiting device includes at least two elastically telescoping assemblies. As shown in fig. 1 and 2, two elastic expansion and contraction units 100 are provided between a first connection plate 201 and a second connection plate 301.
It should be noted that, when the first support component and the second support component are provided, the adaptation of the structural components is improved correspondingly to the number change of the elastic telescopic components. For example, when the first supporting component is arranged, through holes which are not less than the number of the elastic telescopic components are required to be arranged on the rotatable pressing block, so that the telescopic rod of each elastic telescopic component can correspond to one through hole; when setting up the second supporting component, the through-hole on the rocking arm also sets up to be not less than the quantity of the telescopic link of elasticity flexible subassembly.
The embodiment of the utility model provides a conveyor, as shown in fig. 2, the conveyor comprises a bracket 800, a motor 700 and a speed reducing mechanism 900, wherein the motor 700 is connected with the speed reducing mechanism 900, and an output shaft 902 of the speed reducing mechanism is connected with a conveying belt arranged on the bracket 800;
the conveyor further includes the conveyor reduction mechanism torque limiting device, which connects the reduction mechanism 900 and the bracket 800.
In summary, the spring type torsion limiting structure is less prone to damage compared with the traditional friction plate type torsion limiting structure, has good maintenance-free performance and high operation reliability. The torsion limiting device provided by the utility model realizes the torsion limiting effect by using the reaction force generated by the spring when the spring is compressed, the reaction force limits the angular displacement of the speed reducer body which is driven to rotate in a certain direction due to the torque generated by overload of the conveyor, and meanwhile, an alarm signal is sent when the degree of the angular displacement of the speed reducer body reaches a certain value, and the power supply of the speed reducer is cut off, so that the aim of protecting the safety of a conveying system is fulfilled. Because the structural member is mostly of a mechanical structure, the maintenance-free performance of the structural member is higher, and the emergency stop function can be connected with an original control system (provided that the control system originally has an alarm function and a corresponding structure) of the conveyor and realize real-time alarm under the condition of automatic emergency stop, so that equipment is protected, and help is provided for timely recovering the operation of the equipment.
The foregoing has shown and described the basic principles and main features of the present utility model and the advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (10)
1. The torque limiting device of the conveyor speed reducing mechanism is characterized by comprising:
a first support assembly disposed on and moving with a housing of a reduction mechanism of the conveyor;
the second supporting component is fixed on the bracket of the conveyor;
one end of the elastic telescopic component is connected with the first supporting component, and the other end of the elastic telescopic component is connected with the second supporting component;
the emergency stop assembly is provided with a triggering part for generating a stop signal after triggering and an action part for triggering the triggering part to generate the stop signal, the triggering part is connected with the second support assembly, and the action part is connected with the first support assembly.
2. The conveyor reduction mechanism torque limiting device of claim 1, wherein the resilient telescoping assembly comprises:
one end of the telescopic rod passes through a through hole in the supporting structure of the first supporting component, and the other end of the telescopic rod is connected with the second supporting component;
the spring is sleeved on the telescopic rod and can freely move along the telescopic rod;
the adjusting piece is arranged on the telescopic rod in an adjustable mode, and one end of the adjusting piece is clung to the spring.
3. The conveyor reduction mechanism torque limiting device of claim 2, wherein the first support assembly comprises:
the first connecting plate is fixed on the shell of the speed reducing mechanism;
the pressing block is rotationally connected with the first connecting plate;
the pressing block is provided with a through hole which is convenient for one end of the telescopic rod to pass through.
4. The torque limiting device of the conveyor reduction mechanism according to claim 3, wherein a line in which a rotation axis of the pressing block is located when rotating is perpendicular to a line in which a length direction of the telescopic rod is located, and a line in which a rotation axis of the pressing block is located when rotating is parallel to a plane in which a plate surface of the first connecting plate is located.
5. The conveyor reduction mechanism torque limiting device of claim 3 or 4, wherein the first support assembly comprises:
the rotary connecting piece, one end of the rotary connecting piece is fixed in the first connecting plate, and the other end is rotationally connected with the pressing block.
6. The conveyor reduction mechanism torque limiting device of claim 3 or 4, wherein the first support assembly comprises:
the rotary connecting piece, the one end of rotary connecting piece rotates to be connected first connecting plate, the other end fixed connection briquetting.
7. The conveyor reduction mechanism torque limiting device of claim 1, wherein the second support assembly comprises:
a second connecting plate is arranged on the second connecting plate,
and one end of the rocker arm is rotationally connected with the second connecting plate, and the other end of the rocker arm is fixedly connected with the elastic telescopic assembly.
8. The conveyor reduction mechanism torque limiting device of claim 1, wherein the scram assembly comprises:
a third connecting plate fixed to the first support assembly, the third connecting plate having a waist-shaped hole;
the signal switch is fixed on the second supporting component and locked in the waist-shaped hole;
and one end of the triggering piece is connected with the third connecting plate, and the other end of the triggering piece faces the signal switch.
9. A conveyor reduction mechanism torque limiter device of claim 1, 2, 3, 4, 7 or 8 including at least two of the resilient telescoping assemblies.
10. The conveyor comprises a bracket, a motor and a speed reducing mechanism, wherein the motor is connected with the speed reducing mechanism, a force output shaft of the speed reducing mechanism is connected with a conveying belt arranged on the bracket,
the conveyor further comprising a conveyor reduction mechanism torque limiter device according to any one of claims 1 to 9, the conveyor reduction mechanism torque limiter device connecting the reduction mechanism and the bracket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321522640.XU CN220115451U (en) | 2023-06-15 | 2023-06-15 | Torsion limiting device for conveyor speed reducing mechanism and conveyor provided with torsion limiting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321522640.XU CN220115451U (en) | 2023-06-15 | 2023-06-15 | Torsion limiting device for conveyor speed reducing mechanism and conveyor provided with torsion limiting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220115451U true CN220115451U (en) | 2023-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321522640.XU Active CN220115451U (en) | 2023-06-15 | 2023-06-15 | Torsion limiting device for conveyor speed reducing mechanism and conveyor provided with torsion limiting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220115451U (en) |
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2023
- 2023-06-15 CN CN202321522640.XU patent/CN220115451U/en active Active
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