CN106044101B - A kind of anti-deviation pickup conveyer belt - Google Patents

Abstract

The present invention relates to a kind of anti-deviation pickup conveyer belts, belong to agricultural machinery technological field.The conveyer belt includes drive roll of the parallel support in rack（7）And passive guide roller（3）And it is looped around the tooth band of drive roll and passive guide roller（4）, the outer surface of the tooth band is intervally distributed with elastic moving tooth（1）, the both ends of the drive roll and passive guide roller have circumferential slot wide outside and narrow inside；The position that tooth bandwidth direction both ends inner surface corresponds to circumferential slot is fixed at intervals guide pad along conveying direction, and the section of the guide pad and the section of circumferential slot match, and the centre-to-centre spacing C of adjacent guide pad is less than or equal to following formula and calculates determining L values：.Since the present invention can play the role of actively correcting and avoid skidding, the reliable and stable of operation is effectively increased.

Description

An anti-deviation picking conveyor belt

technical field

The invention relates to a conveying device, in particular to an anti-deviation picking conveyor belt, which belongs to the technical field of agricultural machinery.

Background technique

When the pick-up thresher of the prior art works, its toothed-belt type pick-up conveying mechanism does a rotary motion against the forward direction of the machine tool under the action of the driving roller, the middle support roller and the driven roller. During this process, the toothed belt is easily affected by various factors to cause deviation, and also due to wear and tear due to machining accuracy or belt quality problems, the driving force of the toothed belt is insufficient and slippage occurs.

According to the applicant's understanding, the current pick-up and conveying mechanism usually adopts a four-section toothed belt combination, and each section of the toothed belt is separated by a spacer plate. Because there is a gap between the toothed belt and the spacer plate in this structure, it is easy to cause transmission loss and affect the stability and reliability of the machine tool. In addition, in order to prevent the deviation of the toothed belt, the active roller and the driven roller corresponding to the middle position of the width direction of the toothed belt are respectively fixed with anti-deviation hoops. The essence of this anti-deviation device is passive correction after the deviation occurs, not the real meaning Therefore, the anti-deviation effect is not ideal, and it is easy to damage the toothed belt. In addition, if the toothed belt segments are reduced to reduce losses (for example, four sections are changed to two sections), the length of each hoop must be lengthened, which will reduce the ability of the roller to correct the toothed belt.

Contents of the invention

The technical problem to be solved by the present invention is to provide an anti-deviation picking conveyor belt that can be actively corrected, so as to ensure that deviation can be effectively prevented even if it is conveyed efficiently, and the stability of machine tool operation can be improved. and reliability.

In order to solve the above technical problems, an anti-deviation pick-up conveyor belt provided by the present invention includes driving rollers and driven rollers supported in parallel on the frame and a toothed belt that surrounds the driving rollers and driven rollers. The outer surface of the toothed belt There are elastic shifting teeth distributed at intervals, and the two ends of the driving roller and the passive roller are respectively provided with circumferential grooves with outer width and inner narrowness; the positions of the inner surfaces corresponding to the circumferential grooves at both ends of the toothed belt in the width direction are fixed at intervals along the conveying direction There are guide blocks, the cross-section of the guide block matches the cross-section of the circumferential groove, and the center-to-center distance C between adjacent guide blocks is less than or equal to the L value determined by the following formula:

In the formula

d ₂ ——The diameter of the largest roller among the driving roller and the passive roller

d ₁ ——The diameter of the small roller among the driving roller and the passive roller

a ——the center distance between the driving roller and the passive roller

r ——the radius of the small roll in the driving roll and the passive roll.

In this way, at any time, there are at least two guide blocks in the circumferential grooves of the driving roller and the passive roller respectively, and the wedging and guiding effect of the circumferential grooves with a wide outer section and a narrower inner section and the two sides of the guide blocks can always restrain the pick-up and conveying. The belt has a tendency to deviate, which acts as an active correction, so even if it is conveyed efficiently, it can effectively prevent deviation, and the wedging between the circumferential groove and the two sides of the guide block can not only correct the deviation, but also significantly increase the friction between the two , so it can also play a role in avoiding slipping, thereby effectively improving the stability and reliability of the operation.

A further improvement of the present invention is that the circumferential groove is a trapezoidal cross-section groove, and the width of the groove bottom of the trapezoidal cross-section groove is smaller than the width of the short side of the cross-section of the guide block, so that the wedging effect of both sides during transmission can be ensured.

A further improvement of the present invention is that the circumferential groove is a trapezoidal cross-section groove, and the groove bottom width of the trapezoidal cross-section groove is smaller than the short side width of the cross-section of the guide block.

A further improvement of the present invention is that the longitudinal section of the guide block faces the conveying direction.

A further improvement of the present invention is that the middle part of one end of the short side of the guide block has a depression.

A further improvement of the present invention is that the frame is equipped with intermediate support rollers located between the driving roller and the passive roller. When the toothed belt is tensioned, the guide block can better prevent deviation and slippage. effect. In addition, circumferential grooves corresponding to the driving roller and the passive roller are formed on both ends of the middle support roller.

Description of drawings

Fig. 1 is a schematic perspective view of an embodiment of the present invention.

Fig. 2 is a schematic structural view of the passive roller in the embodiment of Fig. 1 .

Fig. 3 is a schematic diagram of the three-dimensional structure of the guide block in the embodiment of Fig. 1 .

Fig. 4 is a schematic diagram of the derivation of the center distance between adjacent guide blocks in the embodiment of Fig. 1 .

Among them: 1-elastic gear 2-guide block 3-driven roller 4-toothed belt 5-toothed belt connecting layer

6- middle support roller 7- driving roller.

Detailed ways

Example 1

The anti-deviation pick-up conveyor belt of this embodiment is shown in Figure 1, and comprises driving roller 7, passive roller 3 that are supported on the frame in parallel, and is positioned at the center support roller of its tensioning action between driving roller 7 and driven roller 3 6, and toothed belt 4. The toothed belt 4 is connected to form a ring through the toothed belt connecting bead 5 and surrounds the driving roller 7 and the driven roller 3 . The outer surface of the toothed belt 4 is distributed with elastic shifting teeth 1 at intervals.

As shown in FIG. 2 , the passive roller 3 has trapezoidal cross-section circumferential grooves 3 - 1 which are wide on the outside and narrow on the inside. The two ends of the driving roller 7 and the middle support roller 6 are respectively provided with trapezoidal cross-sectional circumferential grooves corresponding to the passive roller 3 .

Guide blocks 2 are fixed at intervals along the conveying direction on the inner surfaces of both ends of the toothed belt 4 in the width direction corresponding to the circumferential grooves. As shown in Figure 3, the cross section of the guide block 2 matches the cross section of the circumferential groove, and is also basically trapezoidal, and the cross-sectional area is tapered toward the conveying direction shown by the arrow, so the front of the trapezoidal cross-section is small and the rear is large to form a small cone angle, which can It is easier to enter the circumferential groove during transmission to avoid impact and maintain the smooth transmission of the toothed belt.

The groove bottom width W of the circumferential groove of the trapezoidal section is smaller than the maximum width w of the short side of the guide block section, so the circumferential groove and the two sides of the guide block have a wedging effect during transmission. There is a recess 2-1 in the middle of one end of the short side of the guide block 2, which not only facilitates the installation of the guide block 2 on the toothed belt from the central perforation 2-2 by means of fasteners, but also helps to enhance the wedging effect.

The center-to-center distance C of adjacent guide blocks (see Figure 4) is less than the L value determined by the following formula:

In the formula (the unit is mm)

d ₂ ——The diameter of the largest roller among the driving roller and the passive roller

d ₁ ——The diameter of the small roller among the driving roller and the passive roller

a ——the center distance between the driving roller and the passive roller

r ——the radius of the small roll in the driving roll and the passive roll.

The derivation process of the above formula considers that due to the influence of the installation angle of the elastic gear and the hardness of the tooth belt, the installation size of the guide block needs to be limited. In order to ensure the stability and smoothness of the transmission, the trapezoidal grooves of the active and passive rollers should be There are two guide pads at the same time. When the diameters of the active and passive rollers are equal, it is not difficult to determine the installation center distance of the guide block on the toothed belt. When the diameters of the active and passive rolls are different, the wrap angle on the small diameter roll should be considered, and the wrap angle should be ,in is the large roll diameter, is the small roll diameter, is the center distance between two roller installations. Then the installation distance between the two guide blocks needs to be guaranteed not to be greater than .

The test proves that after adopting this embodiment, there are always at least two guide blocks in the circumferential grooves of the driving roller and the passive roller, respectively, and the wedging and guiding effect between the circumferential groove and the two sides of the guide blocks effectively restrains the high-speed operation of the pick-up conveyor belt. If there is a possible deviation trend, keep its smooth transmission without slipping, so as to effectively improve the stability and reliability of the operation and effectively reduce the loss during the picking process.

In addition to the above-mentioned embodiments, the present invention can also have other implementations. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims (5)

1. a kind of anti-deviation pickup conveyer belt, includes drive roll of the parallel support in rack（7）And passive guide roller（3）And it surround In the tooth band of drive roll and passive guide roller（4）, the outer surface of the tooth band is intervally distributed with elastic moving tooth（1）, the drive roll, quilt The both ends of dynamic roller have circumferential slot wide outside and narrow inside；Tooth bandwidth direction both ends inner surface corresponds to the position of circumferential slot It is fixed at intervals guide pad along conveying direction, the sectional area of the guide pad is tapered towards conveying direction, the section of the guide pad Match with the section of circumferential slot, the centre-to-centre spacing C of adjacent guide pad is less than or equal to following formula and calculates determining L values：

In formula

d₂--- the big roller diameter in drive roll, passive guide roller

d₁--- the small roller diameter in drive roll, passive guide roller

The centre-to-centre spacing of a --- drive roll and passive guide roller

Pony roll radius in r --- drive roll, passive guide roller.

2. a kind of anti-deviation pickup conveyer belt according to claim 1, it is characterised in that：The circumferential slot is trapezoid cross section Slot, the slot bottom width of the trapezoid cross section slot are less than the short side width in guide pad section.

3. a kind of anti-deviation pickup conveyer belt according to claim 2, it is characterised in that：Short side one end of the guide pad Middle part has recess.

4. a kind of anti-deviation pickup conveyer belt according to claim 3, it is characterised in that：The rack, which is equipped with, to be located at actively Support roller between roller and passive guide roller.

5. a kind of anti-deviation pickup conveyer belt according to claim 4, it is characterised in that：The both ends of the support roller are provided with Circumferential slot corresponding with drive roll and passive guide roller.