CN118047177A - Telescopic synchronous transmission mechanism and telescopic machine - Google Patents
Telescopic synchronous transmission mechanism and telescopic machine Download PDFInfo
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- CN118047177A CN118047177A CN202410447243.3A CN202410447243A CN118047177A CN 118047177 A CN118047177 A CN 118047177A CN 202410447243 A CN202410447243 A CN 202410447243A CN 118047177 A CN118047177 A CN 118047177A
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- 230000002829 reductive effect Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 7
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- 238000009434 installation Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 2
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Abstract
The invention belongs to the technical field of conveying devices, and discloses a telescopic synchronous transmission mechanism and a telescopic machine. The telescopic synchronous transmission mechanism comprises a first telescopic unit, a second telescopic unit, a third telescopic unit and a chain, wherein the first telescopic unit, the second telescopic unit and the third telescopic unit are sequentially connected and can slide relatively; one end of the chain is fixedly connected with the rear end of the first telescopic unit body, and the other end of the chain is fixedly connected with the front end of the third telescopic unit body; an upper supporting chain wheel and a lower supporting chain wheel are fixedly arranged at the rear end of the second telescopic unit body, and a chain penetrates through the two supporting chain wheels to form a C shape, so that the upper chain and the lower chain always keep a horizontal tensioning state; the upper end of the chain is provided with a U-shaped outer attaching plate for fixing the accommodating cable to move along with the chain. According to the invention, the conventional drag chain is changed into the chain, the U-shaped outer attaching plate is arranged on the chain to fix the cable, and the upper supporting chain wheel and the lower supporting chain wheel are arranged at the turning part of the chain, so that the upper chain and the lower chain can always keep a horizontal tensioning state when stretching, the height space of a machine body is not occupied, and the volume of equipment is reduced.
Description
Technical Field
The invention belongs to the technical field of conveying devices, and particularly relates to a telescopic synchronous transmission mechanism and a telescopic machine.
Background
The telescopic belt conveyor is a named telescopic belt conveyor, belongs to belt conveyor mechanical equipment, and is provided with a telescopic mechanism on a common belt conveyor, so that the belt conveyor can freely stretch and retract in the length direction, an operator can control the length of the conveyor at any time, and the telescopic belt conveyor is convenient for cargo transportation and is widely applied to vehicle loading and unloading and material conveying systems with telescopic requirements.
The synchronous transmission mechanism of the existing telescopic machine uses a drag chain as a medium, the drag chain is generally composed of a shell, chain links, chain plates and the like, has a shape similar to a chain, has flexibility and durability, can bend and stretch in the movement of mechanical equipment, and simultaneously protects an internal circuit from being damaged and prevents foreign matters from entering. Due to the influence of the structure and the weight of the drag chain, when the telescopic machine stretches out, the drag chain above the conveying belt is easy to collapse to contact the conveying belt, and the conveying work of the conveying belt is disturbed; when the telescopic machine is retracted, the drag chain below the conveying belt is easy to collapse to occupy the height space of the machine body, so that the whole equipment cannot be lowered.
One solution that can be envisaged by existing devices is to address the above problems: the supporting plates which are parallel up and down are arranged at the bottom of the drag chain along the whole telescopic travel of the drag chain, but the installation of the supporting plates also occupies the height space of the machine body, so that the whole equipment cannot be lowered, and further improvement is needed.
Disclosure of Invention
The invention aims to solve the technical problems in the background technology and provides a telescopic synchronous transmission mechanism and a telescopic machine, wherein a conventional drag chain is transformed into a chain, and a U-shaped outer attaching plate fixing cable is arranged on a chain link of the chain so as to move along with the chain; and set up two upper and lower support sprocket in the removal turn department of chain, can ensure that the upper and lower below chain that non-turning radius goes out always keeps horizontal tensioning state when flexible, does not occupy fuselage altitude space, and whole equipment can be done lowly, reduce the volume.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
The telescopic synchronous transmission mechanism comprises a first telescopic unit, a second telescopic unit and a third telescopic unit which are sequentially connected and can slide relatively, and further comprises a chain;
One end of the chain is fixedly connected with the rear end of the machine body of the first telescopic unit, and the other end of the chain is fixedly connected with the front end of the machine body of the third telescopic unit; an upper supporting chain wheel and a lower supporting chain wheel are fixedly arranged at the rear end of the machine body of the second telescopic unit, and the chain penetrates through the two supporting chain wheels to form a C shape, so that the chain always maintains a horizontal tensioning state at a non-turning radius;
the upper end of the chain is provided with a U-shaped outer attaching plate, and the U-shaped outer attaching plate is provided with a pipeline cavity for fixing and accommodating the cable, so that the cable moves along with the chain.
Further, the two support chain wheels are fixedly connected with the rear end of the machine body of the second telescopic unit through a triangular connecting plate.
Further, the triangular connecting plate comprises two triangular plates which are arranged in parallel relatively; the front side of the triangle is provided with two corners which are arranged up and down oppositely, and the rear side is provided with a vertex angle;
the apex angle department of rear side is provided with the hem to the outside, the fuselage rear end of hem through bolt fixed connection second flexible unit, two corners of front side rotate respectively and connect two support sprocket.
Further, the front sides of the two triangular plates are connected through an intermediate connecting plate.
Further, one end of the chain is provided with a tension adjusting device.
Further, the tension adjusting device comprises a screw rod, threads and a fixed connecting plate;
The end part of the chain is connected with a screw rod, the screw rod is connected with a fixed connection plate through a nut, and the fixed connection plate is fixedly connected to the rear end of the machine body of the first telescopic unit or the front end of the machine body of the third telescopic unit.
Further, the chain comprises a plurality of chain links, and outer chain plates of two adjacent chain links are connected front and back through inner chain plates;
the upper end of the chain link is fixedly connected with a U-shaped outer attaching plate, the U-shaped outer attaching plate comprises an inverted U-shaped pipeline accommodating cavity, and two side edges of the U-shaped pipeline accommodating cavity are bent inwards to shrink and are connected between an outer chain plate and an inner chain plate through a pin shaft.
Still further, the cross-sectional shape of the U-shaped pipe receiving chamber includes an open square, open rectangular or open circular arc shape.
Further, a U-shaped outer attachment plate is provided for each link.
Meanwhile, the invention also provides a telescopic machine, which comprises the telescopic synchronous transmission mechanism.
Compared with the prior art, the invention has the beneficial effects that:
(1) According to the telescopic synchronous transmission mechanism, the conventional drag chain is transformed into the chain, the U-shaped outer attaching plate is arranged on the chain link of the chain to fix the accommodating cable, so that the cable moves along with the chain, and the upper supporting chain wheel and the lower supporting chain wheel are arranged at the moving turning position of the chain, so that the horizontal tensioning state of the chain can be always kept when the chain stretches out, the upper chain is prevented from collapsing down to contact with the conveying belt to interfere with the transportation work, the lower chain is prevented from occupying the height space of the machine body when the telescopic machine is retracted, and the whole equipment can be lowered without additionally installing a supporting plate to occupy the height space of the machine body, and the equipment volume is reduced;
(2) The traditional chain tensioning device generally adopts a supporting chain wheel, the diameter of the supporting chain wheel is limited by equipment installation space and cannot be quite large, so that when a chain below a conveying belt is kept in a horizontal state and the chain above the conveying belt is inclined, a telescopic machine cannot extend or retract for the same horizontal distance when the chain extends and retracts for the same length, and the telescopic machine is required to extend and retract for the same distance under the normal working condition, under the condition that the chain above the conveying belt is inclined, the whole chain is in a stretching overstretched state and is in a redundancy overstretched state when the chain is retracted, the tension of the chain is high and small, stress fatigue fracture is easy to occur, and the service life of the chain and the stability and reliability of the chain during working are seriously affected;
One end of the chain is fixed at the rear end of the first machine body, the other end of the chain is fixed at the front end of the third machine body, and the upper support chain wheel and the lower support chain wheel are arranged at the rear end of the second machine body, so that the chain forms a C shape through the two support chain wheels, the upper chain and the lower chain of the chain always keep a horizontal state no matter the telescopic machine stretches out or retracts, the stretching and retracting distance of the horizontal chain is equal to the stretching and retracting horizontal distance of the telescopic machine, the same stretching degree of the chain can be ensured in the stretching process, the upper chain inclination caused by small radius of one support chain wheel is avoided, the corresponding horizontal distance of the chain with the same stretching and retracting length is different, fatigue fracture caused by different stretching degrees of the chain in the stretching process is further caused, and the service life and the working reliability of the chain are seriously damaged;
(3) According to the chain disclosed by the invention, the tension adjusting device is arranged at one fixed end of the chain, the tension adjusting device adjusts the tension of the whole chain to be at a proper level through the screw nut, and simultaneously, the two supporting chain wheels arranged at the turning part of the chain are matched to support and keep the levelness of the upper and lower chains, and the two supporting chain wheels are matched in a coordinated manner, so that the proper and same tension of the chain at work time is effectively ensured, the effective, stable and reliable operation of the whole telescopic synchronous transmission mechanism is ensured, and the service life of the chain is further remarkably prolonged.
Drawings
FIG. 1 is a schematic view of the overall structure of a telescopic machine according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a second telescoping unit of the telescoping machine of an embodiment of the present invention;
FIG. 3 is a schematic view of an installation structure of a telescopic synchronous transmission mechanism according to an embodiment of the present invention;
FIG. 4 is a schematic view of a partial enlarged structure of FIG. 3;
FIG. 5 is a schematic diagram of a triangle connection board according to an embodiment of the invention;
FIG. 6 is a front view of a chain of an embodiment of the present invention;
FIG. 7 is an end view of an embodiment of the present invention after a cable is placed on the chain;
FIG. 8 is a schematic view of the telescopic length of a chain when the turning position of the chain adopts a supporting sprocket, the lower chain is horizontal, and the upper chain is inclined;
FIG. 9 is a schematic view of a telescopic length structure when two support sprockets are used at the turning position of the chain and the upper and lower chains are kept horizontal;
the figure indicates: 1-a first telescoping unit; 2-a second telescoping unit; 3-a third telescoping unit; 4-moving the base; 5-a chain; 6-a triangular connecting plate; 7-a tension adjusting device; 8-supporting a sprocket; a 9-U-shaped outer attachment plate; 10-a cable;
1.1-a first rack; 2.1-a second rack; 3.1-a third rack; 5.1-links; 5.2-inner link plates; 5.3-outer link plates; 6.1-triangle; 6.2-flanging; 6.3-intermediate connection plates; 7.1-a screw rod; 7.2-nuts; 7.3-fixing the connecting plate.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "another end," "upper," "one side," "top," "inner," "front," "center," "two ends," etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "configured," "connected," "secured," "screwed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other or in interaction with each other, unless explicitly defined otherwise, the meaning of the terms described above in this application will be understood by those of ordinary skill in the art in view of the specific circumstances.
Referring to fig. 1-3, embodiments of the present invention provide a telescopic machine and a telescopic synchronous transmission mechanism for the telescopic machine. The telescopic machine comprises a first telescopic unit 1, a second telescopic unit 2 and a third telescopic unit 3 which are connected in sequence and can slide relatively, wherein a movable base 4 is arranged at the bottom of the third telescopic unit 3 and used for moving the whole telescopic machine.
The telescopic synchronous transmission mechanism comprises a chain 5, one end of the chain 5 is fixedly connected with a first frame 1.1 at the rear end of the machine body of the first telescopic unit 1, and the other end of the chain is fixedly connected with a third frame 3.1 at the front end of the machine body of the third telescopic unit 3; an upper supporting chain wheel 8 and a lower supporting chain wheel 8 are fixedly arranged on the front side of a second frame 2.1 at the rear end of the machine body of the second telescopic unit 2, and the chain 5 passes through the two supporting chain wheels 8 to form a C shape, so that the chain 5 always maintains a horizontal tensioning state at a non-turning radius; the upper end of the chain 5 is provided with a U-shaped outer attaching plate 9, and the U-shaped outer attaching plate 9 is provided with a pipeline cavity for fixedly accommodating a cable 10 (see fig. 7), so that the cable 10 moves along with the chain 5.
When the telescopic machine stretches out, the third telescopic unit 3 is fixed, the first telescopic unit 1 and the second telescopic unit 2 stretch out simultaneously and synchronously, and synchronization refers to: the extension distance of the first telescopic unit 1 relative to the second telescopic unit 2 is equal to the extension distance of the second telescopic unit 2 relative to the third telescopic unit 3; in the extending process, one end of the chain 5 moves along with the other end of the first frame 1.1 relative to the chain 5 and the third frame 3.1, and passes through two supporting chain wheels 8 fixedly arranged on the front side of the second frame 2.1. The reverse process of retracting the telescopic machine to extend is not described herein.
In the whole expansion process, no matter the expansion machine stretches out or retracts, the upper and lower chains (namely the chains at the non-turning radius) of the chain 5 always keep a horizontal tensioning state through the support of the two support sprockets 8, so that the phenomenon that the conveying belt of the upper chain is in downward collapse contact with the second expansion unit 2 during the expansion machine stretches out to interfere with the transportation work can be effectively avoided, the lower chain is in downward collapse contact with the second expansion unit 2 during the retraction of the expansion machine, the machine body height space of the second expansion unit 2 is occupied by the lower chain, the machine body height space is occupied by the support plate without additionally installing, the whole equipment can be lowered, and the equipment volume is reduced.
Meanwhile, as shown in fig. 8, in the conventional chain tensioning device, a supporting sprocket is usually adopted, but the diameter of the supporting sprocket cannot be increased due to the limitation of the installation space of the device, so that when the chain below the conveyor belt is kept in a horizontal state, the chain above the conveyor belt is in an inclined state with an inclined angle alpha, and therefore when the chain 5 is extended and retracted by the same length L, the corresponding horizontal distance difference d between the extension and retraction of the telescopic machine is caused, and when the chain above the conveyor belt is in an inclined state under the normal working condition, the telescopic machine is required to be extended and retracted by the same distance, the telescopic machine is in an excessively tight stretching state and in an excessively loose redundancy state when the chain 5 is extended, and when the tension of the chain 5 is increased and decreased, stress fatigue fracture is easy to occur, so that the service life of the chain 5 and the stability and reliability when in operation are seriously affected.
As shown in fig. 9, in the embodiment of the present invention, the chain 5 is supported by providing two support sprockets 8, the chain 5 passes through the two support sprockets 8 to form a "C" shape, no matter the expansion machine is extended or retracted, the upper and lower chains (i.e. the chains at the non-turning radius) of the chain 5 always maintain a horizontal state, the distance L between the extension and retraction of the horizontal state of the chain is equal to the horizontal distance of the expansion machine, which can ensure that the chain 5 maintains the same tension in the expansion process, and avoid the inclination of the upper chain caused by the small supporting radius of one support sprocket, so that the horizontal distances corresponding to the extension and retraction of the chains with the same length are different, further resulting in fatigue fracture caused by the different tension in the expansion process of the chain, and seriously damaging the service life and the reliability of the chain 5.
As shown in fig. 3-5, the two support chain wheels 8 are fixedly connected with the second frame 2.1 through a triangular connecting plate 6, the triangular connecting plate 6 comprises two triangular plates 6.1 which are oppositely arranged in parallel, the front side of each triangular plate 6.1 is provided with two corners which are oppositely arranged up and down, and the rear side is provided with a vertex angle; the vertex angle of the rear side is provided with a folded edge 6.2 to the outer side, the folded edge 6.2 is fixedly connected with a second frame 2.1 through bolts, and two corners of the front side are respectively and rotatably connected with two support chain wheels 8; simultaneously, the front sides of the two triangular plates 6.1 are connected in a reinforcing way through the middle connecting plate 6.3.
As shown in fig. 3-4, the other end of the chain 5 is connected with a third rack 3.1 through a tension adjusting device 7, and the tension adjusting device comprises a screw rod 7.1, threads 7.2 and a fixed connecting plate 7.3; the other end of the chain 5 is connected with a screw rod 7.1, the screw rod 7.1 is connected with a fixed connecting plate 7.3 through a nut, and the fixed connecting plate 7.3 is fixedly connected to the third frame 3.1.
According to the embodiment of the invention, the tension adjusting device is arranged at one fixed end (in other embodiments, one end connected with the rear end of the machine body of the first telescopic unit) of the chain 5, the tension adjusting device adjusts the tension of the whole chain 5 to be at a proper level through the screw nut, meanwhile, the two support sprockets 8 arranged at the turning position of the chain 5 are matched to support and maintain the levelness of the upper and lower chains, the two support sprockets are matched in a coordinated manner, the proper and same tension of the chain 5 at work time is effectively ensured, the effective, stable and reliable operation of the whole telescopic synchronous transmission mechanism is ensured, and the service life of the chain is remarkably prolonged.
As shown in fig. 6-7, the chain 5 comprises a plurality of chain links 5.1, each chain link 5.1 comprises two rollers and outer chain plates 5.3 arranged on the left side and the right side of the rollers, and the outer chain plates 5.3 are connected with the rollers through pin shafts; the outer chain plates 5.3 of two adjacent chain links 5.1 are connected back and forth through the inner chain plates 5.2; the upper end of the chain link 5.1 is fixedly connected with a U-shaped outer attaching plate 9, the U-shaped outer attaching plate 9 comprises an inverted U-shaped pipeline accommodating cavity, two side edges of the U-shaped pipeline accommodating cavity are bent inwards to shrink and are connected between the outer chain plate 5.3 and the inner chain plate 5.2 through a pin shaft, and the specific cross section shape of the U-shaped pipeline accommodating cavity comprises but is not limited to an open square shape, an open rectangular shape or an open circular arc shape, and can be adjusted and set specifically according to the thickness of the cables and the number of the cables as long as the cables can be accommodated; the U-shaped pipeline cavity is used for fixedly accommodating the cable 10, so that the cable 10 moves along with the chain 5.
In some embodiments, a U-shaped outer plate 9 is arranged at each interval of one chain link 5.1, so that the number of the U-shaped outer plates 9 used for fixing the cables can be reduced while accommodating the cables 10, part of pipes can be saved, processing cost can be reduced, and the assembly is easier.
The additional description is required: the key point of the invention is that by arranging the upper supporting chain wheel and the lower supporting chain wheel, the chain can always keep a horizontal tensioning state at a non-turning radius, whether the sizes of the two supporting chain wheels are the same and whether the upper position and the lower position are inclined is not particularly limited, and the corresponding technical scheme is covered in the protection scope of the invention as long as the functions can be realized.
The foregoing description is only exemplary of the invention and is not intended to limit the invention. Any modification, equivalent replacement, improvement, etc. made within the scope of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The telescopic synchronous transmission mechanism comprises a first telescopic unit, a second telescopic unit and a third telescopic unit which are sequentially connected and can slide relatively, and is characterized by further comprising a chain;
One end of the chain is fixedly connected with the rear end of the machine body of the first telescopic unit, and the other end of the chain is fixedly connected with the front end of the machine body of the third telescopic unit; an upper supporting chain wheel and a lower supporting chain wheel are fixedly arranged at the rear end of the machine body of the second telescopic unit, and the chain penetrates through the two supporting chain wheels to form a C shape, so that the chain always maintains a horizontal tensioning state at a non-turning radius;
the upper end of the chain is provided with a U-shaped outer attaching plate, and the U-shaped outer attaching plate is provided with a pipeline cavity for fixing and accommodating the cable, so that the cable moves along with the chain.
2. The telescopic synchronous transmission according to claim 1, wherein the two support sprockets are fixedly connected to the rear end of the body of the second telescopic unit by a triangular connection plate.
3. The telescoping synchronous drive of claim 2 wherein the triangular connection plate comprises two triangular plates disposed in opposed parallel; the front side of the triangle is provided with two corners which are arranged up and down oppositely, and the rear side is provided with a vertex angle;
the apex angle department of rear side is provided with the hem to the outside, the fuselage rear end of hem through bolt fixed connection second flexible unit, two corners of front side rotate respectively and connect two support sprocket.
4. A telescopic synchronous drive according to claim 3, wherein the front sides of the two triangular plates are connected by an intermediate connecting plate.
5. The telescoping synchronous drive of claim 1 wherein one end of the chain is provided with a tension adjustment device.
6. The telescoping synchronous drive of claim 5, wherein the tension adjustment device comprises a screw, threads, and a fixed connection plate;
The end part of the chain is connected with a screw rod, the screw rod is connected with a fixed connection plate through a nut, and the fixed connection plate is fixedly connected to the rear end of the machine body of the first telescopic unit or the front end of the machine body of the third telescopic unit.
7. The telescopic synchronous transmission mechanism according to claim 1, wherein the chain comprises a plurality of chain links, and outer link plates of two adjacent chain links are connected back and forth through inner link plates;
the upper end of the chain link is fixedly connected with a U-shaped outer attaching plate, the U-shaped outer attaching plate comprises an inverted U-shaped pipeline accommodating cavity, and two side edges of the U-shaped pipeline accommodating cavity are bent inwards to shrink and are connected between an outer chain plate and an inner chain plate through a pin shaft.
8. The telescoping synchronous drive of claim 7 wherein the cross-sectional shape of the U-shaped tube receiving chamber comprises an open square, open rectangular, or open circular arc.
9. The telescoping synchronous drive of claim 7, wherein one U-shaped outer plate is provided per link.
10. A telescopic machine comprising a telescopic synchronous drive according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410447243.3A CN118047177A (en) | 2024-04-15 | 2024-04-15 | Telescopic synchronous transmission mechanism and telescopic machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410447243.3A CN118047177A (en) | 2024-04-15 | 2024-04-15 | Telescopic synchronous transmission mechanism and telescopic machine |
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| Publication Number | Publication Date |
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| CN118047177A true CN118047177A (en) | 2024-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410447243.3A Pending CN118047177A (en) | 2024-04-15 | 2024-04-15 | Telescopic synchronous transmission mechanism and telescopic machine |
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| CN (1) | CN118047177A (en) |
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| CN205771425U (en) * | 2016-05-24 | 2016-12-07 | 高标自动化设备（江苏）有限公司 | A kind of multi-joint telescoping type belt conveyor |
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