CN116409579A - Resistance devices for conveying equipment and its conveyor belts - Google Patents

Abstract

The present invention provides a transfer apparatus comprising: a conveyor belt configured to travel to convey a workpiece; a plurality of stationary support members disposed below the conveyor belt and configured to contact and support the conveyor belt, the support members generating a frictional force against the conveyor belt sliding thereon in a direction opposite to a direction of travel of the conveyor belt; and a resistance device configured to generate a resistance force, which is the same as a direction of a frictional force generated by the supporting member to the conveyor belt sliding thereon, and to superimpose the resistance force and the frictional force, thereby making the traveling of the conveyor belt smooth. The resistance device of the present invention "stores" a loose portion of the conveyor belt to the underside of the conveyor belt so that the conveyor belt on the support member is always tensioned while traveling. Therefore, when the belt length is at a predetermined length, the shake can be eliminated; when the length of the conveyor belt becomes longer in use, jitter caused by the change in length is also eliminated.

Description

Resistance devices for conveying equipment and its conveyor belts

technical field

The invention relates to a transmission device, in particular to a reflow soldering transmission device.

Background technique

In the conveying equipment, the conveyor belt is supported on several fixed supporting parts arranged under the conveyor belt during operation, and the conveyor belt will slide on the supporting parts when it travels.

Contents of the invention

By observation, the inventors realized that the support member would create a frictional force on the conveyor belt sliding thereon in the direction opposite to the direction of travel of the conveyor belt. In the reflow machine, the conveyor belt and the supporting part are made of stainless steel material, so the supporting part creates a large frictional force against the conveyor belt sliding on it, and this large frictional force is variable due to the material and shape of the conveyor belt of. The large and variable frictional force will affect the operation of the conveyor belt, causing the conveyor belt to loosen and sometimes tighten when traveling, resulting in vibrations, for example, relatively large and unacceptable vibrations. Even when the length of the conveyor belt has been set to the optimal length before running, the above-mentioned conveyor belt vibration problem will exist, because the conveyor belt will have a large and variable friction effect on it when the conveyor belt is running; and the conveyor belt is affected by the metal Performance After reflow heating and running for a long time, the overall length will be extended, causing the belt to loosen, which in turn will affect the smooth running of the belt (eg, with small acceptable jitter).

In order to solve the above-mentioned shaking problem, the present invention connects a resistance device on the driven wheel. Eliminate the jitter phenomenon when the conveyor belt travels. The reverse resistance generated by the resistance device is a constant reverse resistance that is greater than the varying reverse friction generated by the supporting member on the conveyor belt so that the varying reverse friction will not have an effect and therefore jitter phenomenon is eliminated. Because when a large constant reverse resistance and a small change of reverse friction are superimposed, the jitter produced by the change of reverse friction is not obvious, and the jitter phenomenon is basically eliminated, such as producing a small acceptable shake. In this embodiment, the resistance device has planetary gears, and the constant reverse resistance produced by the resistance device is achieved by the rotating planetary gears.

The present invention does not tension the conveyor belt by adjusting the position of the structure for tensioning the conveyor belt, but "deposits" the loose part of the conveyor belt to the underside of the conveyor belt, that is, the conveyor belt is tight on the upper side of the conveyor equipment, The underside of the conveyor is loose. When the conveying equipment is to transfer the loose conveyor belt on the lower side to the tight upper side, the resistance produced by the resistance device against the advancing direction of the conveyor belt can counteract the transmission force to transfer the loose lower conveyor belt to the tight upper side, Thereby the loose part of the conveyor belt remains on the loose lower side and will not be transferred to the tight upper side, so the tension of the upper conveyor belt still meets the requirements. Therefore, when the length of the conveyor belt becomes longer after being used for a period of time, the conveyor belt of the present invention can also be used normally, because the resistance device can adjust the tension of the conveyor belt on the support member, even if the structure for tensioning the conveyor belt is not adjusted in the case of the location.

Therefore, the present invention at least produces the following technical effects: when the length of the conveyor belt is at a predetermined length, the jitter generated when the conveyor belt travels can be eliminated; eliminate.

According to one aspect of the present invention, the present invention provides a conveying device, comprising: a conveying belt configured to travel to convey workpieces; a plurality of support members disposed below the conveying belt and configured to contact and support Conveyor belt, several supporting parts are fixed, and the conveyor belt slides on the supporting parts when traveling, and the supporting parts generate frictional force on the conveyor belt sliding on it, which is opposite to the forward direction of the conveyor belt; and resistance device, the resistance device is configured to The conveyor belt sliding on the support member creates a resistance in the same direction as the frictional force of the support member on the conveyor belt sliding thereon. Resistance and friction are superimposed to make the conveyor belt travel smoothly.

In one embodiment, the conveying device further includes: a driven wheel configured to contact and support the conveyor belt, and drive the driven wheel to rotate when the conveyor belt travels. The resistance device is configured to be coupled with and driven by the driven wheel.

In one embodiment, the resistance means produces a constant resistance and the support member produces a varying frictional force against the conveyor belt sliding thereon.

In one embodiment, the support member is a support rod.

In one embodiment, the resistance means produces a constant resistance greater than the varying frictional force of the support member against the conveyor belt sliding thereon, the constant resistance being configured to be equal to the varying frictional force of the support member against the conveyor belt sliding thereon. The friction forces are superimposed so that the belt travels smoothly.

In one embodiment, the position of the driven pulley is fixed, and the resistance device is configured to prevent the elongated portion of the conveyor belt from being reversely transmitted to the several supporting members, the elongated portion of the conveyor belt being caused by tensioning the conveyor belt between several supporting members. Produced by the part that slides on the support member.

In one embodiment, the conveying device further comprises a driving wheel in contact with the conveyor belt, the driving wheel is arranged on the discharge side and is configured to be driven by a motor.

In one embodiment, both the resistance device and the driven wheel coupled with the resistance device are arranged on the feed side, the resistance device is configured to generate resistance to tension the conveyor belt sliding on the several support members.

In one embodiment, the resistance device includes a planetary gear and an output shaft coupled with the planetary gear, the output shaft is coupled with a driven shaft through a coupling mechanism, the driven shaft is configured to rotate to drive the planetary gear to rotate, and the conveyor belt is configured to travel forward To drive both the driven shaft and the planetary gears to rotate.

In one embodiment, a detection device is used to detect whether the conveyor belt runs smoothly, and the detection device includes a vibration analysis device.

In one embodiment, the vibration analysis device is configured to be installed on a conveyor belt sliding on several support members, and detects the acceleration of the conveyor belt when the conveyor belt is running, and displays the acceleration for the operator to judge whether the conveyor belt is running smoothly.

In one embodiment, the conveyor belt and support members are made of stainless steel material.

In one embodiment, the conveyor belt includes a mesh belt, and the conveyor includes a reflow soldering conveyor.

Description of drawings

FIG. 1 shows a schematic perspective view of an embodiment of a conveying device 1 according to the present invention;

Fig. 2 shows a partial view of the supporting part 3 in the conveying device 1 shown in Fig. 1 (with the conveyor belt 2 removed);

FIG. 3 shows a schematic perspective view of the three-dimensional structure according to another angle of the conveying device 1 shown in FIG. 1;

Figure 4 shows a partially enlarged view of the driven wheel 7 and the resistance device 8 in the conveying device 1 shown in Figure 1; and

FIG. 5 shows a schematic cross-sectional view of an embodiment of the planetary gear 11 in the resistance device 8 shown in FIG. 1 .

Detailed ways

Various embodiments of the invention will be described below with reference to the accompanying drawings, which form a part hereof. It should be understood that, where possible, the same or similar reference numerals used in the present invention refer to the same components.

Fig. 1 shows a schematic perspective view of an embodiment of a conveying device 1 according to the present invention. As shown in FIG. 1 , the conveying device 1 comprises a conveying belt 2 , several supporting members 3 (visible in FIG. 2 ), driving pulley 5 , driven pulleys 6 a , 6 b , 7 and resistance means 8 . In one embodiment, the conveying device 1 also includes other devices and structures, for example, other driven wheels, tensioning pulleys for tensioning the conveying belt, and so on. The conveyor belt 2 is configured to travel to convey workpieces (not shown) placed thereon, so that the workpieces can be processed accordingly during the conveyance. In one embodiment, the transfer device 1 is a transfer device in a reflow soldering machine, which is used to transfer workpieces (eg, wafers, etc.) for processing such as heating. In other embodiments, the conveying device 1 may be a conveying device in other machines.

Several support members 3 (visible in FIG. 2 ) are located below the conveyor belt 2 and contact and support the conveyor belt 2 so that the conveyor belt 2 slides on the support members 3 as it travels. Several support members 3 are located below the conveyor belt 2, which are hidden in FIG. 1 and visible in FIG. 2 . FIG. 2 shows a partial view of the support part 3 in the conveyor device 1 shown in FIG. 1 (with the conveyor belt 2 removed). Several support members 3 are stationary, and several support members 3 can be fixed to a stationary frame (not shown) of the conveying device 1 . In one embodiment, the support member 3 is a support rod. In other embodiments, the support member 3 may be other support structures for supporting the conveyor belt 2 . As shown in FIG. 2 , the support member 3 includes a bent portion 3 a at an end and a straight portion 3 b in the middle. In one embodiment, the frame of the conveying device 1 includes a card slot and a locking block. The bent portion 3a of the support component 3 can be fixed to the slot of the frame, and the straight portion 3b of the support component 3 can be fixed to the locking block of the frame. In other embodiments, the frame includes other structures for fixing the support member 3 . As shown in FIGS. 1 and 2 , the conveyor belt 2 contacts and winds around the driving pulley 5 and the driven pulleys 6 a , 6 b , 7 . The driven wheels 6a, 6b are arranged close to the support member 3 and near the two ends of the support member 3, the conveyor belt 2 spans the driven wheels 6a, 6b, and the part of the conveyor belt 2 between the driven wheels 6a, 6b is formed by several support members 3 support. The driven wheels 6a, 6b, 7 are used to support the conveyor belt 2 and are driven to rotate by the conveyor belt 2 .

The driving wheel 5 is driven to rotate by the motor 4 (visible in FIG. 3 ), the driving wheel 5 rotates and then drives the conveyor belt 2 wound thereon to move forward, and the conveyor belt 2 moves forward to drive the driven wheels 6a, 6b, 7 wound thereon. Rotate, so that the conveyor belt 2 advances (as shown by the arrow in Figure 1) to convey the workpiece. The drive pulley 5 is located on the discharge side 9 to drive the conveyor belt 2 to move forward. The motor 4 can be mounted on the back side 1b of the conveying device 1 , hidden in FIG. 1 and visible in FIG. 3 . FIG. 3 shows a schematic perspective view of another angle (the motor 4 is visible) of the conveying device 1 shown in FIG. 1 . The various structures of the conveying device 1 in FIG. 3 are the same as those in FIG. 1 , the difference is that FIG. 3 is a three-dimensional structural schematic view of the conveying device 1 viewed from the back 1 b of the conveying device 1 . In other embodiments, the motor 4 may be mounted on the front face 1 a of the conveying device 1 . As shown in FIG. 3 , the drive wheel 5 is coupled with the motor 4 through a coupling structure (not shown), such as a chain and a sprocket. In other embodiments, the coupling structure may include other structures for coupling the driving wheel 5 and the motor 4 .

As shown in Figures 1-3, the conveyor belt 2 slides on the support member 3 when it is running, so that the support member 3 will generate a reverse friction force against the forward direction of the conveyor belt 2 on the conveyor belt 2 sliding on it. In one embodiment, for example, in a reflow soldering machine, the conveyor belt 2 and the support member 3 are made of stainless steel material so as to operate normally when the temperature inside the furnace of the reflow soldering machine is as high as 300°, and the stainless steel material is relatively It has advantages over other metals, because other metals will lose the anti-rust protective layer (galvanized, nickel-plated, chrome-plated) and rust after being worn between them. In other embodiments, the conveying device 1 may be a conveying device in other machines, and the conveying belt 2 and the supporting part 3 of the conveying device 1 may be made of other rigid materials. Since the conveyor belt 2 and the support member 3 are made of stainless steel, the support member 3 has a relatively large reverse frictional force on the conveyor belt 2 sliding thereon. In one embodiment, the conveyor belt 2 is a mesh belt comprising several segments, the mesh belt of each segment consisting of stainless steel wires. Since the conveyor belt 2 is made of stainless steel and is spliced by several mesh belts, the reverse frictional force produced by the support member 3 on the conveyor belt 2 sliding thereon is variable. The large and changing reverse friction force will affect the operation of the conveyor belt 2, so that the conveyor belt 2 is sometimes loose and sometimes tight when traveling, resulting in vibration, for example, the large vibration makes the conveyor belt 2 not move smoothly. Since the conveyor belt 2 is subjected to a large and variable reverse friction force generated by the support member 3 during operation, even when the length of the conveyor belt 2 has been set to an optimal length before operation, the conveyor belt 2 will be in the running. There is the jitter problem mentioned above. Moreover, the overall length of the conveyor belt 2 will be extended after reflow soldering heating and running for a long time due to the metal properties, which will cause the conveyor belt 2 to become loose, which will affect the smooth running of the conveyor belt 2, that is, greater jitter.

In order to solve the above problems, as shown in Figures 1-2, the present invention provides a resistance device 8 in the conveying equipment 1, and the resistance device 8 is configured to produce a pair of conveyor belts 2 sliding on the support member 3 and the support member 3 to slide on it. The frictional force produced by the conveyor belt 2 has the same resistance direction, and the reverse resistance produced by the resistance device 8 and the reverse frictional force produced by the support member 3 are superimposed, so that the conveyor belt 2 can move smoothly. The resistance produced by the resistance device 8 is a constant reverse resistance, which is greater than the changing reverse friction force of the support member 3 on the conveyor belt 2 sliding thereon, the large constant reverse resistance and the small The changing reverse friction force (reverse resistance and reverse friction force have the same direction) is superimposed, so that the small change of reverse friction force has little effect, so the jitter phenomenon is basically eliminated. Because when a large constant reverse resistance and a small change of reverse friction are superimposed, the change of reverse friction is canceled out, thus shaking phenomenon (the cause of which is the change of reverse friction) is eliminated.

The present invention does not adjust the position of each structure (for example, driving wheel, driven wheel) for tensioning the conveyor belt 2 to tension the conveyor belt 2, but "stores" the loose part of the conveyor belt 2 to the conveyor 1 through the resistance device 8 The lower side of the conveying device 1, so that the conveyor belt 2 on the upper side of the conveying device 1 is tight, while the conveyor belt 2 on the lower side of the conveying device 1 is loose. When the conveying equipment 1 is going to transfer the loose conveyor belt 2 on the lower side to the tight upper side, the reverse resistance produced by the resistance device 8 on the conveyor belt 2 in contact with the driven wheel 7 can offset the transmission of the loose conveyor belt on the lower side to the upper side. The conveying force, so that the loose part of the conveyor belt remains on the loose lower side of the conveying device 1 and will not be transmitted to the tight upper side of the conveying device 1, so the tension of the conveyor belt 2 on the upper side still meets the requirements. Therefore, when the length of the conveyor belt 2 has been set to an optimal length before running, the present invention can eliminate the vibration generated when the conveyor belt 2 is running. And, when the length of the conveyor belt 2 becomes longer after being used for a period of time, the vibration caused by the length change will also be eliminated, because the conveyor belt 2 on the support member 3 is always tensioned.

As shown in FIGS. 1-3 , the driven wheel 7 is located at the feed side 10 and is driven to rotate by the conveyor belt 2 . A resistance device 8 is connected to the driven wheel 7 , and the resistance device 8 is located at the feed side 10 . The resistance device 8 is located on the front face 1 a of the conveying device 1 , visible in FIG. 1 and hidden in FIG. 3 . In other embodiments, the resistance device 8 can also be located on the back side 1 b of the conveying device 1 . The resistance device 8 comprises a rotatable device, and the driven wheel 7 drives the rotatable device of the resistance device 8 to rotate, so that the conveyor belt 2 drives the driven wheel 7 and the rotatable device of the resistance device 8 to rotate together when advancing, so that the resistance device 8 will The conveyor belt 2 that slides on the support member 3 produces the same resistance as the direction of the frictional force generated by the support member 3 on the conveyor belt 2 that slides on it, and the resistance and the friction force in the same direction are superimposed, so that the conveyor belt 2 The movement is smooth and the jitter phenomenon is eliminated.

In one embodiment, the resistance device 8 comprises an output shaft 12 and a planetary gear 11 coupled to the output shaft 12 (see visible in FIG. 5 ). As shown in Figures 1-3, in operation, the conveyor belt 2 drives the driven wheel 7 in contact with it to rotate, and the driven wheel 7 then drives the output shaft 12 of the resistance device 8 to rotate through the coupling structure 13, and the output shaft 12 then drives the resistance device 8 to rotate. The planetary gears 11 (see FIG. 5 ) rotate. Therefore, when the conveyor belt 2 travels, the driven wheel 7 and the planetary gear of the resistance device 8 need to be driven to rotate together, so that the planetary gear of the resistance device 8 will generate resistance to the advancement of the conveyor belt 2 . The resistance produced by the resistance device 8 is the resistance generated by the forward movement of the conveyor belt 2 in contact with the driven wheel 7. Since the conveyor belt 2 is annular and according to the mechanics principle, the resistance produced by the resistance device 8 to the conveyor belt 2 in contact with the driven wheel 7 The conveyor belt 2 sliding on the support member 3 will produce an effective reverse resistance opposite to the advancing direction of the conveyor belt. The direction of friction is the same. Effective reverse resistance and effective reverse friction are forces along the longitudinal direction of the conveyor belt that effectively affect the forward travel of the conveyor belt. The effective reverse resistance is a constant resistance, and the constant resistance is determined by the structure of the resistance device 8, such as the structure of the planetary gears (for example, the number of gears, the gear ratio of the gears, the transmission ratio, etc.). For a certain planetary gear, the resistance generated by the planetary gear is substantially constant (under the condition that other structures of the transmission device 1 do not change). In the present invention, the constant effective reverse resistance generated by the planetary gear is greater than the changing effective reverse friction generated by the support member 3, so that when the larger effective reverse resistance and the smaller effective reverse friction are superimposed, there will be The jitter caused by the change of the effective reverse friction force is not obvious (the effect is not large), so the jitter is basically eliminated. In other embodiments, the resistance device 8 may include other structures for generating resistance.

As shown in Figures 1-3, in operation, the driving pulley 5 on the discharge side 9 drives the conveyor belt 2 in contact with it to move forward, and the planetary gear 11 (see Figure 5) of the resistance device 8 will move forward when it is running. The forward travel of the conveyor belt 2 in contact with the driven pulley 7 on the feed side 10 creates resistance, so that the conveyor belt 2 between the drive pulley 5 and the driven pulley 7 on the upper side of the conveying device 1 is always tensioned. The resistance generated by the planetary gear 11 is configured to tension the conveyor belt 2 on the support member 3 without affecting the operation of the driving wheel 5, the driven wheels 6a, 6b, 7 and the conveyor belt 2 (or other structures), for example, in the motor 4 In the case of constant rotation speed, the resistance generated by the planetary gear 11 does not change the rotation speed/travel speed of the driving wheel 5, the driven wheels 6a, 6b, 7 and the conveyor belt 2. For example, it is undesirable for the present invention that the driven wheel 7 rotates slowly (or does not rotate) due to the resistance produced by the planetary gear 11, because the frictional force generated on the conveyor belt 2 when the driven wheel 7 rotates slowly (or does not rotate) will Largely increased, thereby causing the conveyor belt 2 to be easily worn or broken after being used for a period of time.

When the conveyor belt 2 is tensioned, the present invention does not adjust the position of each structure (for example, driving wheel, driven wheel) for tensioning the conveyor belt 2, but "stores" the loose part of the conveyor belt 2 through the resistance device 8 to the underside of the transfer device 1. As shown in Figures 1-3, the resistance device 8 makes the conveyor belt 2 between the driven wheel 7 and the driving wheel 5 on the upper side of the conveying device 1 tight, and the belt 2 on the lower side of the conveying device 1 between the driven wheel 7 and the driving wheel 5 is tight. The conveyor belt 2 in between is loose. When the conveying equipment 1 is going to transmit the loose conveyor belt 2 on the lower side to the tight upper side, the reverse resistance produced by the resistance device 8 on the conveyor belt 2 in contact with the driven wheel 7 can offset the need to transfer the loose conveyor belt 2 on the lower side to the upper side. The transmission force transmitted, so that the loose part of the conveyor belt 2 remains on the loose lower side of the conveying device 1 and will not be transmitted to the tight upper side of the conveying device 1, so the upper side between the driven wheel 7 and the driving wheel 5 The tension of conveyor belt 2 still meets the requirements. Therefore, when the conveyor belt 2 has been used for a period of time, the length becomes longer, and the conveyor belt 2 of the present invention can also be used normally, because the resistance device 8 can adjust the tension of the conveyor belt 2 on the support member 3, even if it is not adjusted for tension. In the case of each structure of the tight conveyor belt 2. The total length of the conveyor belt 2 will be extended after reflow soldering heating and running for a long time because of the metal properties, and the vibration caused by the length change will also be eliminated, because the conveyor belt 2 on the support member 3 is always tensioned.

When the conveyor belt 2 has less acceptable vibration, the conveyor belt 2 runs smoothly, and the vibration phenomenon is basically eliminated. In operation, the detection device can be used to detect whether the resistance device 8 makes the conveyor belt 2 run smoothly. In one embodiment, if the conveyor belt 2 does not run smoothly, the resistance device 8 with other resistance levels can be replaced. The resistance device 8 can be selected from standard products without additional manufacture. In other embodiments, the resistance device 8 may be a resistance device with adjustable resistance. In one embodiment, the detection device comprises a vibration analysis device configured to determine whether the resistance device 8 adjusts the conveyor belt 2 to run smoothly. In one embodiment, the vibration analysis device is arranged on a conveyor belt 2 sliding on a support member 3 . The vibration analysis device is configured to detect the acceleration of the conveyor belt 2 running on the support member 3 while the conveyor belt 2 is traveling. The vibration analysis device can display and/or print the value of the acceleration for the operator to judge whether the conveyor belt 2 runs smoothly. When the acceleration of the conveyor belt is within a certain threshold range, it can be determined that the acceleration meets the requirements, the vibration is within an acceptable small vibration range, and the conveyor belt runs smoothly.

FIG. 4 shows a partially enlarged view of the driven wheel 7 and the resistance device 8 in the conveying device 1 shown in FIG. 1 . As shown in FIG. 4 , the driven wheel 7 is coupled with the resistance device 8 through a coupling structure 13 . The driven wheel 7 includes a rotating shaft 7 a, which is driven to rotate by the conveyor belt 2 . The resistance device 8 comprises a housing 14 , an output shaft 12 extending from the housing 14 and a planetary gear 11 (visible in FIG. 5 ) located within the housing 14 . In one embodiment, the first end of the output shaft 12 is coupled with one gear of the planetary gear 11 . In other embodiments, the output shaft 12 may also be a rotation shaft of a gear of the planetary gear 11 . The second end of the output shaft 12 disposed opposite to the first end is coupled with the rotation shaft 7a of the driven wheel 7 through the coupling structure 13 . In one embodiment, the coupling structure 13 includes a chain 13a and sprockets 13b, 13c engaged with the chain 13a, the sprockets 13b, 13c are respectively fixed to the second end of the output shaft 12 and the rotating shaft 7a of the driven wheel 7. In other embodiments, the coupling structure 13 may include other structures coupled with the driven wheel 7 . When the rotating shaft 7a of the driven wheel 7 rotates, it drives the sprocket 13c to rotate, and the sprocket 13c then drives the chain 13a to move, and the chain 13a then drives the sprocket 13b to rotate, and the sprocket 13b then drives the output shaft 12 to rotate, and the output shaft 12 then drives The planetary gears 11 rotate. Through the coupling structure 13 , the planetary gear 11 of the resistance device 8 is driven to rotate by the driven wheel 7 . Since the driven wheel 7 will drive the planetary gear 11 of the resistance device 8 to rotate, the planetary gear 11 produces resistance to the rotation of the driven wheel 7, and the conveyor belt 2 drives the driven wheel 7 to rotate, so the driven wheel 7 produces resistance to the advancement of the conveyor belt 2. As a result, the planetary gear 11 generates resistance to the travel of the conveyor belt 2 that is in contact with the driven pulley 7 .

FIG. 5 shows a schematic cross-sectional view of an embodiment of the planetary gear 11 in the resistance device 8 shown in FIG. 1 . As shown in FIG. 5, the planetary gear 11 includes a sun gear 11a, a planetary gear 11b, a carrier 11c, and a ring gear 11d. Four planetary gears 11b are shown in FIG. 5 , and in other embodiments, the number of planetary gears 11b can be other suitable numbers. The planetary gear 11b is supported by a fixed shaft of the planetary carrier 11c and rotates around the fixed shaft. The ring gear 11d is an internal gear, the sun gear 11a is located at the center of the planetary gear 11, and the planetary gear 11b is always in a constant mesh state with the adjacent sun gear 11a and the ring gear 11d. In one embodiment, the output shaft 12 is the rotation shaft of the sun gear 11 a of the planetary gear 11 . When the driven wheel 7 drives the output shaft 12 of the resistance device 8 to rotate, that is, drives the rotation shaft of the sun gear 11a to rotate, then the planetary gear 11b meshing with the sun gear 11a is driven to rotate. Therefore, the driven wheel 7 drives the sun gear 11 a and the planetary wheel 11 b of the planetary gear 11 to rotate, and the rotation produces resistance to the operation of the driven wheel 7 , thereby producing resistance to the travel of the conveyor belt 2 in contact with the driven wheel 7 . In other embodiments, the output shaft 12 may also be the rotation shaft of the planetary gear 11 b in the planetary gear 11 . In other embodiments, the planetary gear 11 may include other structural forms.

Although the present disclosure has been described in conjunction with the examples of embodiments outlined above, various alternatives, modifications, changes, improvements and/or substantial equivalents, whether known or not, will occur to those having at least ordinary skill in the art may be obvious, either now or in the foreseeable future. In addition, the technical effects and/or technical problems described in this specification are exemplary rather than limiting; therefore, the disclosures in this specification may be used to solve other technical problems and have other technical effects and/or can solve other technical problems . Accordingly, the examples of embodiments of the present disclosure set forth above are intended to be illustrative and not restrictive. Various changes may be made without departing from the spirit or scope of the disclosure. Accordingly, the present disclosure is intended to embrace all known or earlier developed alternatives, modifications, variations, improvements and/or substantial equivalents.

Claims (13)

1. A transfer device (1), comprising:

a conveyor belt (2), the conveyor belt (2) configured to travel to convey a workpiece;

-a plurality of support members (3), said plurality of support members (3) being arranged below said conveyor belt (2) and configured to contact and support said conveyor belt (2), said plurality of support members (3) being stationary, said conveyor belt (2) sliding on said support members (3) while travelling, said support members (3) generating a friction force against the conveyor belt (2) sliding thereon against the direction of travel of the conveyor belt;

-a resistance device (8), the resistance device (8) being configured to generate a resistance to the conveyor belt (2) sliding on the support member (3) that is the same as the direction of the friction force generated by the support member (3) on the conveyor belt (2) sliding thereon, the resistance and the friction force being superimposed.

2. The transfer device (1) according to claim 1, wherein the transfer device (1) further comprises:

a driven wheel (7), the driven wheel (7) being configured to contact the conveyor belt (2) and support the conveyor belt (2), the conveyor belt (2) driving the driven wheel (7) to rotate as it travels;

wherein the resistance device (8) is configured to be coupled to the driven wheel (7) and driven by the driven wheel (7).

3. Conveyor device (1) according to claim 1, said resistance means (8) generating a constant resistance, said support member (3) generating a varying friction force against said conveyor belt (2) sliding thereon.

4. The transfer device (1) according to claim 1, the support member (3) being a support bar (3).

5. A conveyor apparatus (1) according to claim 3, characterized in that the constant resistance is greater than the varying friction of the supporting member (3) against the conveyor belt (2) sliding thereon, the constant resistance being configured to overlap with the varying friction of the supporting member (3) against the conveyor belt (2) sliding thereon, so as to smooth the travel of the conveyor belt (2).

6. A conveyor apparatus (1) according to claim 2, wherein the position of the driven wheel (7) is fixed, wherein the resistance means (8) are configured to prevent a back transfer of a lengthened portion of the conveyor belt (2) onto the number of support members (3), the lengthened portion of the conveyor belt (2) resulting from tensioning a portion of the conveyor belt (2) sliding over the number of support members (3).

7. The conveying apparatus (1) according to claim 2, characterized in that the conveying apparatus (1) further comprises a driving wheel (5), the driving wheel (5) being in contact with the conveyor belt (2), the driving wheel (5) being arranged at the discharge side (9) and being configured to be driven by a motor (4).

8. The conveyor apparatus (1) according to claim 7, characterized in that said resistance means (8) and said driven wheel (7) coupled to said resistance means (8) are both provided on the feeding side (10), said resistance means (8) being configured to generate a resistance to tension said conveyor belt (2) sliding on said several support members (3).

9. The transfer apparatus (1) of claim 8, wherein the resistance device (8) comprises a planetary gear (11) and an output shaft (12) coupled to the planetary gear (11), the output shaft (12) being coupled to the driven shaft (7) by a coupling mechanism (13), the driven shaft (7) being configured to rotate to drive the planetary gear (11) to rotate, the conveyor belt (2) being configured to travel forward to drive both the driven shaft (7) and the planetary gear (11) to rotate.

10. The conveying apparatus (1) according to claim 1, characterized in that whether the conveyor belt (2) is travelling steady is detected by detecting means comprising vibration analyzing means.

11. The conveying apparatus (1) according to claim 10, wherein the vibration analysis device is configured to be provided on the conveyor belt (2) that slides on the plurality of support members (3), and to detect acceleration of the conveyor belt (2) while the conveyor belt (2) is traveling, and to display the acceleration for an operator to determine whether the conveyor belt (2) is traveling stationary.

12. The conveyor apparatus (1) according to claim 1, characterized in that the conveyor belt (2) and the support member (3) are made of stainless steel material.

13. The apparatus according to claim 1, characterized in that the conveyor belt (2) comprises a mesh belt, and the conveyor apparatus (1) comprises a reflow conveyor apparatus (1).

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