CN112503146A - Transmission mechanism for tea leaf baking equipment - Google Patents

Transmission mechanism for tea leaf baking equipment Download PDF

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Publication number
CN112503146A
CN112503146A CN202011352483.3A CN202011352483A CN112503146A CN 112503146 A CN112503146 A CN 112503146A CN 202011352483 A CN202011352483 A CN 202011352483A CN 112503146 A CN112503146 A CN 112503146A
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CN
China
Prior art keywords
belt
group
tensioning
belt tensioning
belts
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Granted
Application number
CN202011352483.3A
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Chinese (zh)
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CN112503146B (en
Inventor
蒋红春
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Hubei Dongshi Tea Co ltd
Zhongou Hubei Intellectual Property Service Co ltd
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Individual
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Priority to CN202011352483.3A priority Critical patent/CN112503146B/en
Publication of CN112503146A publication Critical patent/CN112503146A/en
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Publication of CN112503146B publication Critical patent/CN112503146B/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H7/10—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley
    • F16H7/12—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley
    • F16H7/1254—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley without vibration damping means
    • F16H7/1263—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley without vibration damping means where the axis of the pulley moves along a substantially straight path
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23F—COFFEE; TEA; THEIR SUBSTITUTES; MANUFACTURE, PREPARATION, OR INFUSION THEREOF
    • A23F3/00—Tea; Tea substitutes; Preparations thereof
    • A23F3/06—Treating tea before extraction; Preparations produced thereby
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H2007/0863—Finally actuated members, e.g. constructional details thereof
    • F16H2007/0865—Pulleys
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H2007/0876—Control or adjustment of actuators
    • F16H2007/088—Manual adjustment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H2007/0889—Path of movement of the finally actuated member
    • F16H2007/0891—Linear path
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H2007/0889—Path of movement of the finally actuated member
    • F16H2007/0897—External to internal direction

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Food Science & Technology (AREA)
  • Polymers & Plastics (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)

Abstract

The invention discloses a transmission mechanism for tea baking equipment, which comprises a transmission part and a belt tensioning part, wherein the transmission part is provided with at least two adjacent belts, the belt tensioning part comprises at least one belt tensioning device, the belt tensioning device is arranged between the two adjacent belts and is used for simultaneously tensioning the two belts, two sides of the belt tensioning device are respectively provided with a telescopic belt tensioning block, and the outer side of the belt tensioning block is provided with a rotating rod which is used for being in contact with the belts. Because the temperature of the tea baking environment is usually higher, the belt below the baking equipment is loosened under the condition of long-term work, so that the belt needs to be tensioned, the belt tensioning device is arranged between two adjacent belts, when the belt is loosened, the belt tensioning block is only required to extend outwards, and the purpose of tensioning the belt can be achieved by simultaneously tensioning the two belts by using the rotating stick, which is very convenient.

Description

Transmission mechanism for tea leaf baking equipment
Technical Field
The invention relates to the field of tea processing equipment, in particular to improvement of a transmission mechanism in tea baking equipment.
Background
In the tea processing and making process, tea baking is an indispensable step, and aims to remove moisture in tea, avoid secondary fermentation of tea and even mildew, and also achieve the purpose of shaping tea.
At present, the mode of manual tea baking fades away gradually, and more use dedicated equipment to replace manual tea baking, but at present many tea baking equipment all do not possess the function of upset, consequently at the in-process of toasting, the inhomogeneous condition of being heated often appears in tealeaves, just so can influence the final quality of tealeaves.
To this, some baking equipment that can overturn to tealeaves have also appeared in the market, for example the baking equipment that the inventor designed, as shown in fig. 1, it has set up a plurality of baking barrel 2 side by side in oven 1, and each baking barrel 2's below has set up a carousel 3 respectively, and during the roast tea, put into tealeaves in each baking barrel 2, then closed the oven door, starting drive equipment makes each carousel 3 drive baking barrel 2 rotatory can begin to roast tea.
In this toasting device, each carousel 3 is synchronous revolution, and is driven by a set of drive mechanism, specific: as shown in fig. 1-3, a second belt pulley 412 is connected to a lower portion of each rotary table 3, each second belt pulley 412 is matched with a first belt pulley 411, the matched first belt pulley 411 is in transmission connection with the second belt pulley 412 through a belt 413, a first chain wheel 421 is arranged above one first belt pulley 411, a motor 424 for driving the first chain wheel 421 to rotate is further arranged above the first chain wheel 421, a second chain wheel 422 is respectively arranged above the other first belt pulleys 411, and the first chain wheel 421 is in transmission connection with the second chain wheels 422 through a chain 423; therefore, when the motor 424 works, the kinetic energy is transmitted to each second pulley 412, so as to drive each second pulley 412 to rotate synchronously, thereby driving each turntable 3 to rotate synchronously.
The transmission mechanism is easy to have the following problems in the process of long-term use: because of the influence of the high temperature of the baking environment, after long-term operation, each belt is loosened, and therefore the belt needs to be replaced regularly. The cost is high because the belt is replaced at intervals, and therefore the inventor considers whether a special device can be designed to tension the belt, namely, the device can be used for tensioning the belt when the belt is loosened, and then after the device works for a period of time, the belt can be tensioned again by the device if the belt is loosened again, and the process is repeated until the belt is failed and then a new belt is replaced, so that the service cycle of the belt can be prolonged, and the cost is reduced.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the transmission mechanism is improved by adding a tensioning device, and the belt can be tensioned every time the belt is loosened.
In order to solve the above problems, the present invention provides a transmission mechanism for a tea leaf roasting apparatus, which includes a transmission part and a belt tensioning part;
the transmission part comprises at least two groups of belt transmission components and a group of driving components; the belt transmission assemblies are arranged at intervals and are positioned on the same horizontal plane, each belt transmission assembly comprises a first belt pulley, a second belt pulley and a belt, the second belt pulley is connected with a rotary disc of the tea leaf baking equipment and is used for driving the tea leaf baking equipment to rotate, the first belt pulleys are arranged beside the second belt pulley at intervals and are positioned on the same horizontal plane with the second belt pulley, the belts are wound between the first belt pulley and the second belt pulley, and in two adjacent groups of belt transmission assemblies, the distance between the belts is between 5cm and 15 cm; the driving assembly comprises a first chain wheel, at least one second chain wheel, a chain and a motor, wherein the first chain wheel is arranged above one of the first belt pulleys, each second chain wheel is respectively arranged above the other first belt pulleys, the chain is encircled between the first chain wheel and each second chain wheel, and the motor is arranged above the first chain wheel and used for driving the first chain wheel to rotate;
the belt tensioning part comprises at least one belt tensioning device, and the belt tensioning device is arranged between two adjacent belts and is used for simultaneously tensioning the belts of the two groups of belt transmission assemblies; the belt tensioning device comprises a shell, a screw rod, two movable blocks and two belt tensioning blocks, wherein the top and the bottom of the shell are sealed, a strip-shaped notch is respectively arranged at the left side and the right side of the shell, the screw rod longitudinally penetrates through the shell from the central line of the shell, the screw rod is connected with the shell through a bearing at the place penetrating through the shell, two sections of threads with different rotating directions are arranged on the screw rod and are respectively a positive thread and a negative thread, wherein the positive thread is positioned at the upper half part in the shell, the negative thread is positioned at the lower half part in the shell, the two movable blocks are respectively sleeved on the positive thread and the negative thread of the screw rod in a threaded manner, the directions of which the left side and the right side are inclined planes and the tensioning directions are inclined planes are inclined towards the central line of the movable blocks more and more close to the middle part of the screw rod, the two, the other part then by the bar breach stretch out outside the casing to the upper and lower both ends of belt tensioning block are close to one side of screw rod and all are formed with the inclined plane, and the inclined plane phase-match of this inclined plane and movable block, and one side that belt tensioning block kept away from the screw rod still is provided with the rod that changes that is used for contacting with the belt.
Furthermore, the belt tensioning device also comprises two springs, the two springs are connected between the two belt tensioning blocks, and the two springs are respectively positioned on the front side and the rear side of the middle part of the screw rod.
Furthermore, a hexagonal nut is arranged at one end, located at the bottom of the shell, of the screw rod.
Furthermore, the part of the belt tensioning block outside the shell extends to the front side and the rear side respectively to form two arc-shaped wing plates.
Furthermore, two first limit plates, two second limit plates and two third limit plates are arranged in the shell; the two first limiting plates are respectively positioned at the front side and the rear side of the left belt tensioning block and used for limiting the belt tensioning block to move only in a straight line, and the two first limiting plates are fixedly connected with the inner wall of the shell; the two second limiting plates are respectively positioned at the front side and the rear side of the right belt tensioning block and used for limiting the belt tensioning block to move only in a straight line, and the two second limiting plates are fixedly connected with the inner wall of the shell; two the third limiting plate be located the front and back both sides of movable block respectively for the upset of this movable block of restriction, and two third limiting plates all with the inner wall fixed connection of casing.
Furthermore, one side of the belt tensioning block, which is far away from the screw rod, is provided with a vertically extending strip-shaped groove, the rotating rod is arranged in the strip-shaped groove, and one part of the rotating rod protrudes out of the groove.
Further, the rotating rod is made of rigid materials.
Furthermore, the number of the belt transmission assemblies is four, and the four belt transmission assemblies are sequentially sorted into a first group, a second group, a third group and a fourth group; the number of the second chain wheels is three, the three second chain wheels are respectively arranged on first belt pulleys of the second group, the third group and the fourth group of belt transmission assemblies, and the first chain wheels are arranged on the first belt pulleys of the first group of belt transmission assemblies; the number of the belt tensioning devices is two, one belt tensioning device is arranged between the belts of the first group and the second group of belt transmission assemblies, and the other belt tensioning device is arranged between the belts of the third group and the fourth group of belt transmission assemblies.
Furthermore, a second gear is further arranged above the first chain wheel, a first gear is arranged on an output shaft of the motor and meshed with the second gear, and the number of teeth of the first gear is less than that of the second gear.
The working principle of the invention is as follows:
because the screw rod is provided with two sections of threads with different rotating directions, namely a positive thread and a negative thread, and the positive thread and the negative thread are respectively in threaded connection with two movable blocks, when the screw rod rotates, the two movable blocks move in opposite directions or move in opposite directions; when the screw is set to rotate in the clockwise direction, the two movable blocks move oppositely, and when the screw rotates in the anticlockwise direction, the two movable blocks move back to back;
when the belt is loosened and needs to be tensioned, a worker can clamp a hexagon nut arranged on the lower end head of the screw rod by using a wrench, and then rotate the wrench clockwise to enable the screw rod to rotate clockwise; in the process, the two movable blocks move oppositely, and in the moving process, the inclined surfaces of the movable blocks push the inclined surfaces of the belt tensioning blocks, so that the two belt tensioning blocks gradually extend out of the shell;
after working for a period of time, if the belt is loosened again, the worker can rotate the screw rod clockwise again by using the wrench, so that the two belt tensioning blocks continuously extend outwards, and the belt is tightened again by the rotating rod. The belt can be tightened again when being loosened in such a reciprocating way until the service life of the belt is ended;
after the service life of the belt is ended, when a new belt needs to be replaced, the screw rod can be rotated anticlockwise by using a wrench, and the two movable blocks move backwards; in the process, under the action of the tensile force of the spring, the two belt tensioning blocks can retract into the shell, and after the two belt tensioning blocks retract to the extreme positions, the waste belt can be taken down and replaced by a new belt; after the new belt is used for a period of time, if the belt is loosened, the screw rod can be rotated clockwise by using the wrench to tighten the belt.
The invention has the beneficial effects that:
because the temperature of the tea baking environment is usually higher, the belt below the baking equipment is loosened in the case of long-term work, and the belts are loosened in the case of multiple belts below the baking equipment; because the belt tensioning device is arranged between two adjacent belts, and the belt tensioning blocks on two sides of the belt tensioning device can simultaneously extend out only by rotating the screw rod, the two adjacent belts can be tensioned simultaneously when the belts are tensioned, so that the arrangement number of the belt tensioning devices can be reduced, the time consumption of operation when the belts are tensioned can be reduced, and the belts do not need to be tensioned one by one; meanwhile, the two belt tensioning blocks can gradually extend outwards, so that after the belt is tensioned, if the belt is loosened after being used for a period of time, the two belt tensioning blocks can also continuously extend outwards to tension the belt again.
Drawings
FIG. 1 is a schematic structural view of a toasting apparatus designed by the inventors;
FIG. 2 is a top plan view of the drive mechanism at the bottom of the toasting apparatus of FIG. 1;
FIG. 3 is a schematic diagram of the connection of a first pulley, a second pulley, a belt, a first sprocket, and a motor in the transmission of FIG. 2;
FIG. 4 is a top view of the present invention;
FIG. 5 is a schematic view of the belt tensioner of the present invention simultaneously tensioning two adjacent belts;
FIG. 6 is a schematic view of the construction of the belt tensioner of the present invention;
FIG. 7 is a view taken along line A-A of FIG. 6;
FIG. 8 is a view from the B-B direction in FIG. 6;
figure 9 is a schematic view of the two belt-tensioner blocks of figure 6 shown extended to either side;
FIG. 10 is a view from the C-C of FIG. 9;
FIG. 11 is a view from direction D-D of FIG. 9;
figure 12 is a schematic view of the two belt-tensioning blocks of figure 9 against two belts, respectively;
fig. 13 is a view from E-E of fig. 12.
Detailed Description
The present invention will be described in further detail with reference to specific examples, but the embodiments of the present invention are not limited thereto.
The invention provides a transmission mechanism for tea baking equipment, which comprises a transmission part and a belt tensioning part, wherein the transmission part is connected with the belt tensioning part;
as shown in fig. 3-5, the transmission portion includes at least two sets of belt transmission assemblies 41 and one set of driving assembly 42; each group of belt transmission components 41 are arranged at intervals and are positioned on the same horizontal plane, each group of belt transmission components comprises a first belt pulley 411, a second belt pulley 412 and a belt 413, wherein the second belt pulley 412 is connected with the rotary disc 3 of the tea leaf baking equipment and is used for driving the tea leaf baking equipment to rotate, the first belt pulley 411 is arranged beside the second belt pulley 412 at intervals and is positioned on the same horizontal plane with the second belt pulley 412, the belt 413 is wound between the first belt pulley 411 and the second belt pulley 412, and in two adjacent groups of belt transmission components 41, the distance between the belts 413 is between 5cm and 15 cm; the driving assembly 42 includes a first sprocket 421, at least one second sprocket 422, a chain 423 and a motor 424, wherein the first sprocket 421 is installed above one of the first belt pulleys 411, each of the second sprockets 422 is respectively installed above the other first belt pulleys 411, the chain 423 is wound around between the first sprocket 421 and each of the second sprockets 422, and the motor 424 is installed above the first sprocket 421 for driving the first sprocket 421 to rotate;
as shown in fig. 4 to 11, the belt tensioning portion includes at least one belt tensioner 5, and the belt tensioner 5 is disposed between two adjacent belts 413 for simultaneously tensioning the belts 413 of two sets of belt drive assemblies 41; the belt tensioning device 5 comprises a shell 51, a screw 52, two movable blocks 53 and two belt tensioning blocks 54, wherein the top and the bottom of the shell 51 are sealed, the left side and the right side of the shell 51 are respectively provided with a strip-shaped notch 511, the screw 52 longitudinally penetrates through the shell 51 from the center line of the shell 51, the screw 52 is connected with the shell 51 through a bearing 55 at the position penetrating through the shell 51, the screw 52 is provided with two sections of threads with different rotating directions, namely a positive thread 521 and a negative thread 522, wherein the positive thread 521 is positioned at the upper half part in the shell 51, the negative thread 522 is positioned at the lower half part in the shell 51, the two movable blocks 53 are respectively sleeved on the positive thread 521 and the negative thread 522 of the screw 52 in a threaded manner, the left side and the right side of each movable block 53 are inclined planes, and the inclined directions are inclined towards the center line of the movable block 53 closer to the, two belt tensioning piece 54 symmetrical arrangement are in the left and right sides of screw rod 52, and belt tensioning piece 54 partly is located the casing 51, and another part is then stretched out outside casing 51 by bar breach 511 to belt tensioning piece 54's upper and lower both ends are close to one side of screw rod 52 and all are formed with the inclined plane, and this inclined plane and the inclined plane phase-match of movable block 53, and belt tensioning piece 54 keeps away from one side of screw rod 52 and still is provided with the commentaries on classics rod 541 that is used for contacting with belt 413.
In the above-mentioned technical solution, when the belt 413 is tightened, the two rotating rollers 541 are respectively in contact with the two belts 413. The purpose of the roller 541 arranged outside the belt tensioning block 54 is: since the belt 413 is continuously rotated during operation, if the belt 413 is directly tightened by the belt tightening block 54 without the rotating roller 541, the friction force between the belt 413 and the belt tightening block 54 is very large, which may not only damage the belt 413, but also cause a very large resistance when the belt 413 rotates, and therefore, the inventor intends to provide the rotating roller 541 on the outer side of the belt tightening block 54 to reduce the friction resistance.
Preferably, as shown in fig. 6 and 8, the belt tensioner 5 further comprises two springs 56, wherein the two springs 56 are connected between the two belt-tensioning blocks 54, and the two springs 56 are respectively located at the front and rear sides of the middle portion of the screw 52.
Due to the spring 56, when the two movable blocks 53 no longer press the belt-tightening block 54, the belt-tightening block 54 is drawn toward the middle by the spring 56, so that the situation that the belt-tightening block 54 accidentally touches the belt 413 when the belt 413 is not tightened can be avoided.
Preferably, as shown in fig. 6, a hexagonal nut 57 is provided at one end of the screw 52 located at the bottom of the housing 51.
Preferably, as shown in fig. 7, the portion of the belt-stretching block 54 outside the housing 51 extends to the front and rear sides to form two arc-shaped wings 543.
Due to the wing plates 543, a plurality of rotary rollers 541 can be arranged on the wing plates 543 in parallel to increase the contact area between the rotary rollers 541 and the belt 413, so as to prevent the belt 413 from contacting the non-rotary rollers 541 when the belt is tightened.
Preferably, as shown in fig. 7, two first limiting plates 581, two second limiting plates 582 and two third limiting plates 583 are further disposed in the housing 51; the two first limit plates 581 are respectively positioned at the front side and the rear side of the left belt tensioning block 54 and used for limiting the belt tensioning block 54 to move only in a straight line, and the two first limit plates 581 are fixedly connected with the inner wall of the shell 51; the two second limiting plates 582 are respectively located on the front side and the rear side of the right belt tensioning block 54 and used for limiting the belt tensioning block 54 to move only in a straight line, and both the two second limiting plates 582 are fixedly connected with the inner wall of the shell 51; two third limiting plate 583 be located the front and back both sides of movable block 53 respectively for the upset of this movable block 53 is restricted, and two third limiting plate 583 all with casing 51's inner wall fixed connection.
Preferably, as shown in fig. 7, a vertically extending strip-shaped groove 542 is provided on a side of the belt-tensioning block 54 facing away from the screw 52, the rotating roller 541 is installed in the strip-shaped groove 542, and a portion of the rotating roller 541 protrudes out of the groove 542.
Preferably, the rotating rod 541 is made of a rigid material.
Preferably, as shown in fig. 4, the number of the belt transmission assemblies 41 is four, and the four belt transmission assemblies 41 are sequentially ordered into a first group, a second group, a third group and a fourth group; the number of the second chain wheels 422 is three, the three second chain wheels 422 are respectively installed on the first belt pulleys 411 of the second group, the third group and the fourth group of belt transmission assemblies 41, and the first chain wheel 421 is installed on the first belt pulley 411 of the first group of belt transmission assembly 41; the number of belt tensioners 5 is two and one belt tensioner 5 is arranged between the belts 413 of the first and second sets of belt drive assemblies 41 and the other belt tensioner 5 is arranged between the belts 413 of the third and fourth sets of belt drive assemblies 41.
Preferably, as shown in fig. 3, a second gear 425 is further disposed above the first chain wheel 421, a first gear 426 is disposed on the output shaft of the motor 424, the first gear 426 is meshed with the second gear 425, and the number of teeth of the first gear 426 is less than that of the second gear 425.
Preferably, referring to fig. 4, assuming a spacing Lcm between the belts 413 in two adjacent sets of belt drive assemblies 41, the outer diameter of the belt tensioner 5 is (L-4) cm when the two belt blocks 54 of the belt tensioner 5 are not ejected, and the belt tensioner 5 is located in the middle of the two belts 413, i.e., when the left and right sides of the belt tensioner 5 are spaced 2cm from the two belts 413.
Because the temperature of the tea roasting environment is usually higher, under the condition of long-term work, the belt below the roasting equipment can be loosened, and because the lower part of the roasting equipment is provided with a plurality of belts, the loosening condition can be generated on each belt, so that after the long-term work, all the belts need to be replaced, or each belt needs to be tensioned. In the process of tensioning, the inventor considers that one device can be designed to simultaneously tension two adjacent belts, so that the number of belt tensioning devices can be reduced, and the operation time consumption of tensioning the belts can be reduced without tensioning one by one. Based on this, the inventors have devised the belt tensioner of the present invention.
It should be noted that: because the tea leaf baking equipment does not belong to high-precision equipment, the belt only needs to meet the requirement of transferring kinetic energy, and does not need to have high precision, when the belt is tightened, whether the belt is tightened or not can be observed only by naked eyes, the tightening degree of the belt does not need to be measured by a tool, the belt cannot be greatly influenced if the belt is slightly tightened or loosened, and the kinetic energy can be smoothly transferred as long as the belt cannot slip.
The working principle of the invention is as follows:
because the screw 52 is provided with two threads with different rotation directions, namely the positive thread 521 and the negative thread 522, and the two movable blocks 52 are respectively connected to the positive thread 521 and the negative thread 522 in a threaded manner, when the screw 52 rotates, the two movable blocks 52 either move in opposite directions or move in opposite directions; here, when the setting screw 52 rotates in the clockwise direction, the two movable blocks 52 move toward each other, and when the setting screw 52 rotates in the counterclockwise direction, the two movable blocks 52 move away from each other;
when the belt is loosened and needs to be tensioned, a worker can use a wrench to clamp a hexagon nut 57 arranged on the lower end of the screw 52 and then rotate the wrench clockwise to enable the screw 52 to rotate clockwise; in the process, the two movable blocks 52 move towards each other, and in the moving process, the inclined surface of the movable block 52 pushes the inclined surface of the belt-tensioning block 54, so that the two belt-tensioning blocks 54 gradually extend to the outer side of the housing 51 (see fig. 9-11), and when the belt-tensioning block 54 continues to extend outwards after the rotary roller 541 contacts the belt 413, the rotary roller 541 gradually presses the belt 413 to tighten the loosened belt 413, see fig. 5, 12 and 13;
after a certain period of operation, if the belt 413 is loosened again, the worker can rotate the screw 52 clockwise again by using the wrench, so that the two belt tensioning blocks 54 continue to extend outwards, and the rotating roller 541 tensions the belt 413 again. The belt 413 can be tightened again each time the belt 413 is loosened in such a reciprocating way until the service life of the belt 413 is ended;
after the service life of the belt 413 is ended, when a new belt 413 needs to be replaced, the screw 52 can be rotated anticlockwise by a wrench, so that the two movable blocks 53 move backwards; in the process, under the action of the tensile force of the spring 56, the two belt-tensioning blocks 54 retract into the housing 51 (the retracted state can be seen in fig. 6-8), and when the two belt-tensioning blocks 54 retract to the extreme position, the used belt 413 can be taken off and replaced by a new belt 413; after a period of time, if the new belt 413 is loosened, the wrench can rotate the screw 52 clockwise to tighten the belt 413.

Claims (9)

1. A transmission mechanism for tea baking equipment is characterized by comprising a transmission part and a belt tensioning part;
the transmission part comprises at least two groups of belt transmission assemblies (41) and a group of driving assemblies (42); each group of belt transmission components (41) are arranged at intervals and are positioned on the same horizontal plane, each group of belt transmission components comprises a first belt pulley (411), a second belt pulley (412) and a belt (413), wherein the second belt pulley (412) is connected with a rotary disc of the tea leaf baking equipment and is used for driving the tea leaf baking equipment to rotate, the first belt pulleys (411) are arranged beside the second belt pulley (412) at intervals and are positioned on the same horizontal plane with the second belt pulley (412), the belts (413) are wound between the first belt pulley (411) and the second belt pulley (412), and in two adjacent groups of belt transmission components (41), the distance between the belts (413) is between 5cm and 15 cm; the driving assembly (42) comprises a first chain wheel (421), at least one second chain wheel (422), a chain (423) and a motor (424), wherein the first chain wheel (421) is installed above one of the first belt pulleys (411), the second chain wheels (422) are respectively installed above the other first belt pulleys (411), the chain (423) is encircled between the first chain wheel (421) and the second chain wheels (422), and the motor (424) is installed above the first chain wheel (421) and is used for driving the first chain wheel (421) to rotate;
the belt tensioning part comprises at least one belt tensioning device (5), and the belt tensioning device (5) is arranged between two adjacent belts (413) and is used for simultaneously tensioning the belts (413) of the two groups of belt transmission assemblies (41); belt tensioner (5) includes casing (51), screw rod (52), two movable blocks (53) and two belt tensioning piece (54), the top and the bottom of casing (51) are all sealed, casing (51) each has seted up a bar breach (511) in the left and right sides, screw rod (52) vertically run through casing (51) from the central line of casing (51), and screw rod (52) are connected with casing (51) through bearing (55) in the place of running through casing (51), be provided with the different screw thread of two sections direction of rotation on screw rod (52), be positive thread (521) and back-off thread (522) respectively, wherein positive thread (521) are located the first half of casing (51), and back-off thread (51) are located the latter half of casing (51), two movable blocks (53) respectively the screw thread 522 cup joint on positive thread (521) and back-off thread (522) of screw rod (52), the direction that the left and right sides of two movable blocks (53) is inclined plane and slope is for being close to screw rod (52) middle part more to the central line slope of movable block (53), two belt tensioning piece (54) symmetrical arrangement in the left and right sides of screw rod (52), partly be located casing (51) of belt tensioning piece (54), another part then by bar breach (511) stretch out outside casing (51), and the upper and lower both ends of belt tensioning piece (54) are close to one side of screw rod (52) and all are formed with the inclined plane, and the inclined plane phase-match of this inclined plane and movable block (53), one side that screw rod (52) were kept away from in belt tensioning piece (54) still is provided with and is used for changeing rod (541) that contact with belt (413).
2. The transmission mechanism for a tea leaf roasting apparatus according to claim 1, wherein the belt tensioning device (5) further comprises two springs (56), the two springs (56) are connected between the two belt tensioning blocks (54), and the two springs (56) are respectively located at the front and rear sides of the middle part of the screw (52).
3. A drive mechanism for a tea leaf roasting apparatus according to claim 1 wherein the end of the screw (52) at the bottom of the housing (51) is provided with a hexagonal nut (57).
4. The transmission mechanism for a tea roasting apparatus according to claim 1 wherein the portion of the belt-tensioning block (54) outside the housing (51) extends to the front and rear sides to form two arc-shaped wings (543).
5. The transmission mechanism for a tea baking apparatus according to claim 1, wherein two first limiting plates (581), two second limiting plates (582) and two third limiting plates (583) are further disposed in the housing (51); the two first limit plates (581) are respectively positioned at the front side and the rear side of the left belt tensioning block (54) and used for limiting the belt tensioning block (54) to move only in a straight line, and the two first limit plates (581) are fixedly connected with the inner wall of the shell (51); the two second limiting plates (582) are respectively positioned at the front side and the rear side of the right belt tensioning block (54) and used for limiting the belt tensioning block (54) to move only in a straight line, and the two second limiting plates (582) are both fixedly connected with the inner wall of the shell (51); two third limiting plate (583) be located the front and back both sides of movable block (53) respectively for the upset of restriction this movable block (53), and two third limiting plate (583) all with the inner wall fixed connection of casing (51).
6. A transmission mechanism for a tea leaf roasting apparatus according to claim 1 wherein the side of the belt-tensioning block (54) facing away from the screw (52) is provided with a vertically extending strip-shaped groove (542), the rotary roller (541) is mounted in the strip-shaped groove (542), and a portion of the rotary roller (541) protrudes out of the groove (542).
7. A transmission mechanism for a tea leaf roasting apparatus according to claim 1 wherein said rotating roller (541) is made of a rigid material.
8. The transmission mechanism for a tea leaf roasting apparatus according to any one of claims 1 to 7, wherein the number of the belt transmission members (41) is four groups, and the four groups of the belt transmission members (41) are sequentially ordered into a first group, a second group, a third group and a fourth group; the number of the second chain wheels (422) is three, the three second chain wheels (422) are respectively arranged on the first belt pulleys (411) of the second group, the third group and the fourth group of belt transmission assemblies (41), and the first chain wheel (421) is arranged on the first belt pulley (411) of the first group of belt transmission assembly (41); the number of the belt tensioning devices (5) is two, one belt tensioning device (5) is arranged between the belts (413) of the first group and the second group of belt transmission assemblies (41), and the other belt tensioning device (5) is arranged between the belts (413) of the third group and the fourth group of belt transmission assemblies (41).
9. A transmission mechanism for a tea leaf roasting apparatus according to any one of claims 1-8 wherein a second gear (425) is further disposed above the first chain wheel (421), a first gear (426) is disposed on the output shaft of the motor (424), the first gear (426) is meshed with the second gear (426), and the number of teeth of the first gear (426) is less than that of the second gear (425).
CN202011352483.3A 2020-11-27 2020-11-27 Transmission mechanism for tea leaf baking equipment Active CN112503146B (en)

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US936094A (en) * 1905-08-24 1909-10-05 Meyer Joseph Davidsen Belt controller and tightener.
DE9011970U1 (en) * 1990-08-18 1992-01-23 Bach, Michael, 5000 Köln Clamping device
EP0915268A1 (en) * 1997-10-08 1999-05-12 Borg-Warner Automotive, Inc. Mechanical tensioner with friction damping
US20020025869A1 (en) * 2000-04-14 2002-02-28 Alexander Serkh Tensioner
JP2009509101A (en) * 2005-09-19 2009-03-05 ボーグワーナー・インコーポレーテッド Friction damping blade tensioner
DE102010049901A1 (en) * 2010-10-28 2012-05-03 Schaeffler Technologies Gmbh & Co. Kg Hydraulic clamping device in traction drive of internal combustion engine, has outer sleeve with inclined inner surface located in force-transmitting manner such that elastic force is imparted inwardly on the sleeve in radial direction
CN104295684A (en) * 2013-07-16 2015-01-21 无锡成博科技发展有限公司 Adjustable belt drive tensioning device
CN205877097U (en) * 2016-06-25 2017-01-11 湛江市恒润机械有限公司 Granulation machine middle bearing support guiding mechanism
CN106641140A (en) * 2017-03-03 2017-05-10 安徽江淮纳威司达柴油发动机有限公司 Engine belt tensioning adjusting mechanism
CN210594434U (en) * 2019-07-25 2020-05-22 无锡市振飞新型包装材料有限公司 Cast film winding machine

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US936094A (en) * 1905-08-24 1909-10-05 Meyer Joseph Davidsen Belt controller and tightener.
DE9011970U1 (en) * 1990-08-18 1992-01-23 Bach, Michael, 5000 Köln Clamping device
EP0915268A1 (en) * 1997-10-08 1999-05-12 Borg-Warner Automotive, Inc. Mechanical tensioner with friction damping
US20020025869A1 (en) * 2000-04-14 2002-02-28 Alexander Serkh Tensioner
JP2009509101A (en) * 2005-09-19 2009-03-05 ボーグワーナー・インコーポレーテッド Friction damping blade tensioner
DE102010049901A1 (en) * 2010-10-28 2012-05-03 Schaeffler Technologies Gmbh & Co. Kg Hydraulic clamping device in traction drive of internal combustion engine, has outer sleeve with inclined inner surface located in force-transmitting manner such that elastic force is imparted inwardly on the sleeve in radial direction
CN104295684A (en) * 2013-07-16 2015-01-21 无锡成博科技发展有限公司 Adjustable belt drive tensioning device
CN205877097U (en) * 2016-06-25 2017-01-11 湛江市恒润机械有限公司 Granulation machine middle bearing support guiding mechanism
CN106641140A (en) * 2017-03-03 2017-05-10 安徽江淮纳威司达柴油发动机有限公司 Engine belt tensioning adjusting mechanism
CN210594434U (en) * 2019-07-25 2020-05-22 无锡市振飞新型包装材料有限公司 Cast film winding machine

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Denomination of invention: A Transmission Mechanism for Tea Baking Equipment

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