CN215572032U

CN215572032U - Tensioning mechanism and mesh belt drying furnace

Info

Publication number: CN215572032U
Application number: CN202121452219.7U
Authority: CN
Inventors: 陶玮; 张成松
Original assignee: Nanjing Nianda Furnace Science And Technology Co ltd
Current assignee: Nanjing Nianda Furnace Science And Technology Co ltd
Priority date: 2021-06-28
Filing date: 2021-06-28
Publication date: 2022-01-18
Anticipated expiration: 2031-06-28

Abstract

The application discloses a tensioning mechanism, which comprises a frame, wherein an upper guide plate and a lower guide plate are respectively arranged on an upper beam and a lower beam of the frame; the upper guide plate and the lower guide plate are opposite up and down and extend along the first axial direction, a sliding block is clamped on the upper guide plate and the lower guide plate in a sliding manner, an internal thread block is fixedly arranged on the sliding block, a screw rod is also rotatably arranged on the frame, the internal thread block is sleeved on the screw rod and is meshed with the screw rod, and the sliding block can reciprocate along the first axial direction under the driving of the screw rod; a bearing seat is fixedly installed on the sliding block, and in the up-down direction, a shaft hole in the bearing seat is not intersected with the screw rod. The application also discloses a mesh belt drying furnace adopting the tensioning mechanism. Because shaft hole and lead screw non-intersect, when regard straining device as mesh belt drying furnace from the driving wheel mounting bracket, can be at the direct mount encoder of the epaxial direct mount of pivot from the driving wheel to detect the rotational speed from the driving wheel, can not cause the error of detection data.

Description

Tensioning mechanism and mesh belt drying furnace

Technical Field

The utility model relates to a tensioning mechanism and a mesh belt drying furnace.

Background

The mesh belt drying furnace for feeding and discharging by a full-automatic robot is a commonly used drying furnace type at present, and a feeding end and a discharging end of the mesh belt drying furnace are respectively provided with 1 robot for feeding and discharging.

The mesh belt drying furnace is a channel type heat insulation shell and is provided with a through type conveying mesh belt, and the conveying mesh belt is respectively distributed at a hearth, a feeding end of the furnace and a discharging end of the furnace.

The driving device of the conveying mesh belt is arranged at the discharging end of the furnace body and is responsible for dragging the mesh belt to support the workpiece to be dried to be conveyed from the charging end to the discharging end of the furnace, and the workpiece is dried in the hearth. The driven end of the mesh belt is provided with a tensioning sliding block which is responsible for tensioning the mesh belt, so that the conveying mesh belt can convey stably without slipping during conveying.

Because 2 robots cooperate with feeding and discharging, the robots need to identify and judge the running condition of the mesh belt through rotary encoders arranged on the shaft heads of the feeding and discharging transition shafts of the mesh belt. Thereby performing the subsequent coordination action. Therefore, the mesh belt is provided with a rotary encoder for detecting the conveying speed of the mesh belt on the transition rollers at the driving end and the driven end, so as to output signals to the feeding and discharging robots for placing the piece to be dried at the feeding end of the mesh belt drying furnace and taking the dried piece at the discharging end.

The roller at the driving end of the mesh belt is fixed, and a coaxial collinear rotary encoder is well suitable to be installed. However, the roller at the driven end of the mesh belt is adjusted and moved, and the coaxial collinear rotary encoder cannot be installed on the conventional adjusting slide block at the driven end. Because, the shaft head of the mesh belt transition roller of the conventional mesh belt adjusting slide block, the adjusting slide block and the adjusting screw rod are in the condition of coplanar and orthogonal. The shaft head of the mesh belt transition roller cannot penetrate through the adjusting screw rod and bore holes are formed in the adjusting sliding block, otherwise, the adjusting screw rod can be damaged, and the tensioning sliding block is caused to lose efficacy.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems, the present invention first proposes a tensioning mechanism, which comprises a frame, wherein an upper guide plate and a lower guide plate are respectively mounted on an upper beam and a lower beam of the frame, wherein the upper guide plate is fixedly mounted on the lower side of the upper beam, and the lower guide plate is fixedly mounted on the upper side of the lower beam; the upper guide plate and the lower guide plate are opposite up and down and extend along the first axial direction, a sliding block is clamped on the upper guide plate and the lower guide plate in a sliding manner, an internal thread block is fixedly arranged on the sliding block, a screw rod extending along the first axial direction is also rotatably arranged on the frame, the internal thread block is sleeved on the screw rod and meshed with the screw rod, and the sliding block can reciprocate along the first axial direction under the driving of the screw rod; a bearing seat is fixedly installed on the sliding block, the central axis of the bearing seat is perpendicular to the direction of the first axis, and in the up-down direction, the shaft hole in the bearing seat is not intersected with the screw rod.

In this application, because shaft hole and lead screw non-intersect, when regard straining device as mesh belt drying furnace from the driving wheel mounting bracket, can be at the direct mount encoder in the pivot from the driving wheel to directly detect the rotational speed from the driving wheel, can not cause the error of detection data because phenomenons such as skidding.

Specifically, two opposite ends of the screw rod are respectively formed into an adjusting end and a supporting end, the supporting end is a light shaft section, the frame further comprises a first vertical plate and a second vertical plate which are oppositely arranged, and the supporting end is rotatably supported on the first vertical plate; the adjusting end freely penetrates through the second vertical plate, a step is arranged on the adjusting end, the step is positioned on the outer side of the second vertical plate, and a locking nut is screwed on the adjusting end and positioned on the inner side of the second vertical plate;

two plane thrust bearings are sleeved on the adjusting end, one plane thrust bearing is located between the locking nut and the second vertical plate, and the other plane thrust bearing is located between the step and the second vertical plate.

The two plane thrust bearings can ensure that the screw rod cannot rotate difficultly due to friction with the second vertical plate when rotating, and the operation friction resistance is reduced. When the position of the sliding block needs to be adjusted, the locking nut does not need to be unscrewed, the screw rod is rotated by the handle, and the sliding block moves along the first axis direction under the driving of the screw rod and reaches a set position.

Furthermore, in order to rotate the screw rod, a handle is further arranged on the adjusting end and is positioned on the outer side of the step. When the screw rod is rotated, the handle can be directly screwed, or tools such as a wrench and the like can be clamped on the handle to rotate the screw rod.

Secondly, this application still discloses a guipure drying furnace, it includes two above-mentioned arbitrary straining device, two straining device set up along the horizontal direction interval, the pivot at a driven drum both ends is installed in the bearing frame on a straining device respectively with rotating, and fixed mounting has the encoder on one of them pivot, this encoder and this pivot coaxial setting.

On this guipure drying-furnace, owing to with encoder snap-on in the pivot, can measure the rotational speed of driven cylinder indiscriminately, can not produce the signal difference that consequently middle depended wheel transmission caused, cause detection error.

Further, for the encoder is installed and is maintained in the installation for being convenient for, install a transition axle on a pivot, this transition axle and this pivot coaxial arrangement, and this transition axle extends towards the direction that deviates from driven cylinder and outwards stretches out straining device, and this encoder detachably installs the one end that deviates from driven cylinder at this transition axle. This design can avoid setting up the encoder in straining device's inside, causes the inconvenience of encoder installation and maintenance, sets up a transition axle, can set up the thickness of transition axle according to specific needs to can conveniently maintain and change the encoder.

Drawings

FIG. 1 is a schematic structural view of an embodiment of a tensioning mechanism.

Fig. 2 is a top view of fig. 1.

Fig. 3 is a right side view of fig. 1.

Fig. 4 is a schematic structural diagram of a mesh belt drying furnace.

Fig. 5 is a top view of fig. 4.

Detailed Description

First, the tension mechanism will be explained below.

Referring to fig. 1-3, the pointing direction of diagram M in fig. 1 represents the first axial direction.

A tensioning mechanism 100 comprises a frame 10, wherein the frame 10 comprises a first vertical plate 13 and a second vertical plate 14 which are arranged at intervals, an upper beam 12 is connected to the top ends of the first vertical plate and the second vertical plate, and a lower beam 11 is connected to the bottom ends of the first vertical plate and the second vertical plate.

An upper guide plate 22 and a lower guide plate 21 are respectively mounted on the upper beam 12 and the lower beam 11, wherein the upper guide plate 22 is fixedly mounted on the lower side of the upper beam 12 by a first countersunk head bolt 23, and the lower guide plate 21 is fixedly mounted on the upper side of the lower beam 11 by the first countersunk head bolt 23. The upper guide plate 22 and the lower guide plate 21 are opposed to each other in the up-down direction and each extend in the first axial direction.

A slider 31 is slidably held on the upper and lower guide plates, through grooves extending in the first direction are formed on both the upper and lower sides of the slider 31, and the slider is held on the upper and lower guide plates through the through grooves.

An internally threaded block 33 is fixedly mounted to the slider 31, and a second counterbore bolt 332 secures the slider 31 to one side of the slider. The slider 31 is provided with a female screw through hole 331.

The screw rod 41 extends along the first axial direction, and the internal thread block 33 is sleeved on the screw rod and meshed with the screw rod. The slider is capable of reciprocating in a first axial direction by the driving of the lead screw 41. A bearing seat 32 is fixedly mounted on the slide block 31, a central axis 322 of the bearing seat 32 is perpendicular to the first axial direction, and the shaft hole 321 on the bearing seat 32 does not intersect with the screw rod 41 in the vertical direction. In this embodiment, the shaft hole 321 is located below the screw rod 41 and has a gap.

In this embodiment, the two opposite ends of the screw rod 41 are respectively formed as an adjusting end 48 and a supporting end 49, the supporting end 49 is a light axis section, and the supporting end 49 is rotatably supported on the bearing of the first vertical plate 13. The second vertical plate is provided with a screw shaft hole, and the adjusting end 48 is freely inserted into the screw shaft hole and extends out of the screw shaft hole, namely, the adjusting end penetrates through the second vertical plate. A step 46 is arranged on the adjusting end, the step 46 is positioned on the outer side of the second vertical plate, and a locking nut 42 is screwed on the adjusting end, and the locking nut 42 is positioned on the inner side of the second vertical plate.

Two plane thrust bearings 47 are sleeved on the adjusting end 48, wherein one plane thrust bearing 47 is located between the locking nut 42 and the second vertical plate 14, and the other plane thrust bearing 47 is located between the step 46 and the second vertical plate 14.

To facilitate screwing of the screw, a handle 43 is also provided at the adjustment end, which is located outside the step 46, in this embodiment a rectangular cylinder with a square cross-section.

The mesh belt drying oven will be explained below.

Referring to fig. 4 and 5, the mesh belt drying oven includes two tensioning mechanisms 100, the two tensioning mechanisms 100 are arranged at intervals along the horizontal direction, the rotating shafts 65 at two ends of a driven roller 61 are respectively and rotatably installed in the bearing seats 32 on one tensioning mechanism 100, a transition shaft 63 is installed on one of the rotating shafts, the transition shaft extends in the direction away from the driven roller and extends outwards from the tensioning mechanism, an encoder 64 is detachably installed on one end of the transition shaft away from the driven roller by a coupling 66, and the encoder, the transition shaft and the rotating shaft are coaxially arranged.

The driving roller 71 is rotatably mounted on two support frames 200, and a motor 72 is mounted on one of the support frames, and an output shaft of the motor is connected to a rotating shaft of the driving roller 71. The mesh belt 62 is wound around the driving drum 71 and the driven drum 61.

Before the operation, the screw rod is rotated through the handle to tension the mesh belt, and then the motor is started to enable the mesh belt drying furnace to enter the working state. When the motor drives the driving roller to rotate, the driven roller synchronously rotates under the driving of the mesh belt, the encoder works, and the encoder is installed on the rotating shaft of the driven roller, so that the rotating speed of the driven roller can be measured indiscriminately, and the signal difference caused by the transmission of the middle idler wheel can not be generated, thereby causing detection errors.

Claims

1. A tensioning mechanism is characterized by comprising a frame, wherein an upper guide plate and a lower guide plate are respectively arranged on an upper beam and a lower beam of the frame, the upper guide plate is fixedly arranged on the lower side of the upper beam, and the lower guide plate is fixedly arranged on the upper side of the lower beam; the upper guide plate and the lower guide plate are opposite up and down and extend along the first axial direction, a sliding block is clamped on the upper guide plate and the lower guide plate in a sliding manner, an internal thread block is fixedly arranged on the sliding block, a screw rod extending along the first axial direction is also rotatably arranged on the frame, the internal thread block is sleeved on the screw rod and meshed with the screw rod, and the sliding block can reciprocate along the first axial direction under the driving of the screw rod; a bearing seat is fixedly installed on the sliding block, the central axis of the bearing seat is perpendicular to the direction of the first axis, and in the up-down direction, the shaft hole in the bearing seat is not intersected with the screw rod.

2. The tensioning mechanism of claim 1,

the two opposite ends of the screw rod are respectively formed into an adjusting end and a supporting end, the supporting end is a light shaft section, the frame further comprises a first vertical plate and a second vertical plate which are oppositely arranged, and the supporting end is rotatably supported on the first vertical plate; the adjusting end freely penetrates through the second vertical plate, a step is arranged on the adjusting end, the step is positioned on the outer side of the second vertical plate, and a locking nut is screwed on the adjusting end and positioned on the inner side of the second vertical plate;

3. The tensioning mechanism of claim 2,

a handle is also arranged on the adjusting end and is positioned outside the step.

4. A mesh belt drying furnace, characterized by comprising two tensioning mechanisms according to any one of claims 1 to 3, wherein the two tensioning mechanisms are arranged at intervals along the horizontal direction, rotating shafts at two ends of a driven roller are respectively and rotatably arranged in bearing seats on one tensioning mechanism, and an encoder is fixedly arranged on one rotating shaft and is coaxially arranged with the rotating shaft.

5. The mesh belt drying oven according to claim 4, wherein a transition shaft is mounted on a rotary shaft, the transition shaft is disposed coaxially with the rotary shaft, the transition shaft extends in a direction away from the driven drum and outwardly extends from the tensioning mechanism, and the encoder is detachably mounted on an end of the transition shaft away from the driven drum.