CN111924432A

CN111924432A - Net chain conveying system suitable for automobile whole-vehicle conveying and corrugated paper logistics conveying

Info

Publication number: CN111924432A
Application number: CN202010905870.9A
Authority: CN
Inventors: 吴翔
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-09-01
Filing date: 2020-09-01
Publication date: 2020-11-13

Abstract

The invention relates to a mesh chain conveying system suitable for automobile whole vehicle conveying and corrugated paper logistics conveying, which belongs to the technical field of conveying equipment.

Description

Net chain conveying system suitable for automobile whole-vehicle conveying and corrugated paper logistics conveying

Technical Field

The invention belongs to the technical field of conveying equipment, and particularly relates to a structural design of a net chain conveying system.

Background

The net chain conveying system consists of two driving chain wheels and a conveying belt matched with the driving chain wheels in an annular mode, the existing automobile is wholly conveyed, plastic modular chain plates are mostly adopted for conveying logistics of heavy objects such as corrugated paper and the like, the chain plates are composed of a plurality of chain links, the adjacent chain links are rotationally connected through pin shafts, and the conveying function is realized by meshing engagement grooves formed in the chain plates and gear teeth of the driving chain wheels. Because the meshing groove is arranged on the back surface of the chain link, and the outer ends of the front side and the rear side of the meshing groove are respectively provided with the cambered surfaces, theoretically, the gear teeth are required to enter from the outer end of the meshing groove to reach the bottom of the meshing groove, so that the tooth surface of the gear teeth is completely meshed with the meshing groove, and transmission is realized. However, in a heavy load driving mode, the chain link can enlarge the pitch of the chain plate due to load, so that the latter meshing surface is blocked to enter the theoretical position of the meshing groove smoothly when rotating to the tooth surface of the chain wheel along the front rotating pin, the arc surfaces at two sides of the meshing groove in the chain link are moved downwards, the stress direction on the arc surfaces is changed, the chain plate is subjected to larger outward thrust, and tooth jumping is caused in an overlarge load meshing process. And the tooth-shaped stress surface under the stress condition generates certain displacement sliding in the stress process, and the friction generated by the sliding causes the meshing arc surface to be worn, so that the original shape is changed. The link joint jumps the stability that the tooth can influence the transport in the use to can cause wearing and tearing to the link joint, can form wearing and tearing to the teeth of a cogwheel along with the emergence of long-term jump tooth phenomenon, the link joint can be broken by the stretch even, causes the life of link joint to shorten. The phenomenon can be increased along with the increase of the weight of conveyed materials, the load is increased, the tooth jumping condition of a chain plate can be more serious, and the conveying capacity of a net chain conveying system is influenced.

The chain plate of the net chain conveying system is also composed of a plurality of chain links, the front end and the rear end of each chain link are respectively provided with a row of lugs, the front chain link and the rear chain link are mutually connected through a pin shaft, the back surfaces of the chain links are provided with meshing grooves capable of containing the teeth of a transmission chain wheel, and the rear surfaces of the lugs of the chain links on the front side of the meshing grooves are provided with arc surfaces. The movement of the chain plate under the rotation of the chain wheel is realized by the fact that the tooth of the driving chain wheel enters the engaging groove in the chain link and the tooth surface of the tooth abuts against the arc surface of the lug surface of the chain link. Because the meshing is line contact, the contact position of the gear teeth and the lug is continuously changed in the meshing process, when the vertex angle of the gear teeth is contacted with the lug, the lug can be subjected to radial and outward component force of the chain wheel, so that the conveying surface of the conveying net chain can jump, and the conveying effect and the service life of the conveying net chain are directly influenced.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides the mesh chain conveying system which can improve the conveying stability and prolong the service life and is suitable for the whole automobile conveying and corrugated paper logistics conveying.

The invention comprises a transmission chain wheel and an annular conveying net chain matched with the transmission chain wheel, wherein the annular conveying net chain comprises a plurality of chain links sequentially spliced along the length direction of the conveying net chain, each chain link is respectively provided with a front row of lugs and a rear row of lugs along the length direction of the conveying net chain, the lugs of adjacent chain links are staggered along the width direction of the conveying net chain and are rotationally connected through a pin shaft, and the back of each chain link is provided with an engaging groove, and the invention is characterized in that: the surface of a back row of lugs of a front chain link adjacent to the chain link provided with the meshing groove is provided with an arc-shaped surface and a plane which are continuous with each other, the continuous arc-shaped surface and the plane face the meshing groove, the arc-shaped surface is close to the front surface of the chain link compared with the plane, the tooth surface of a gear tooth of the transmission chain wheel is an inclined surface, and the chain link is meshed with the inclined surface of the gear tooth through the plane.

The plane meshed with the gear teeth of the transmission chain wheel is arranged on the lug of the chain link, the plane and the gear surface of the gear teeth are kept in a parallel fit state in the meshing transmission process, the plane and the surface are mutually abutted to ensure that the meshing between the plane and the gear teeth is always in surface contact in the transmission process, and the line contact in the prior art is fundamentally changed, so that the design of the chain link can effectively avoid tooth skipping, the fluctuation change of a transmission surface of a transmission net chain in the transmission process can not occur, the transmission effect is effectively improved, and the service life of the whole system is also prolonged.

When the chain plate is used for heavy load conveying, even if the pitch of the chain plate is enlarged due to heavy load, the back engaging surface is blocked when rotating to the tooth surface of the gear tooth along the front rotating shaft, so that the chain plate enters an outward pitch circle position, when the gear tooth engages with the plane of the chain link, the position of the tooth surface of the gear tooth engaged by the chain link which moves upwards is changed, but the mutual stress direction of the plane and the tooth surface cannot be changed. When the pitch of the link plate is increased and the pitch circle of the link plate is increased, the driving force of the sprocket can be transmitted to the engaging surface of the link in any state as long as the tooth surface of the gear tooth can engage with the plane of the link. Because the pressure angle of the gear teeth is small, the outward thrust of the gear teeth to the chain links is small, and the gear teeth are in plane contact with the chain links, the abrasion caused by the displacement sliding generated in the using process of the system can not change the plane of the chain links and the original shape of the tooth surfaces of the gear teeth.

The invention avoids the phenomenon of overturning and tooth disengaging caused by the joint rotation of the chain link and the gear tooth in the form of middle arc surface driving, enables the chain link to be correspondingly jointed and driven at the corresponding radial pitch circle position of the chain wheel within a certain range according to the pitch size of the chain link, and adapts to the pitch change caused by the stress and the abrasion of the chain link by changing the radial pitch circle size at the meshing position (more suitable for the design with less tooth number). The meshing surface with a larger radial meshing range of the chain plate avoids the phenomena of tooth climbing and tooth jumping of the conveying chain plate, and avoids the phenomenon of breaking the conveying net chain caused by tooth jumping.

The pitch circle refers to the diameter of the center of the pin hole of the chain link on the circumference of the gear in the working state.

The invention is suitable for all conveying industries, in particular to the large-load conveying industries of automobile whole vehicle conveying and corrugated paper logistics conveying.

Further, the plane may be a tangent plane tangent to the arc-shaped plane. The advantage of using tangential surfaces as the engaging surfaces is that there is no resistance to the chain links from being pulled up when they are disengaged from the gear.

An included angle between a tangent point of the tangent plane on the continuous arc-shaped surface and a connecting line of the axes of the rear row of lugs and a connecting line of the axes of the front row of lugs and the rear row of lugs of the chain link to which the tangent plane belongs is beta, and the included angle is beta =360 DEG/the number of teeth of the sprocket + n, wherein the number of the teeth of the sprocket is an integer which is equal to or greater than 4, and n = 0-3 deg. When n is 0 degree, the tangent plane is vertical to the pin hole of the chain link of the next section, and the outward thrust of the gear teeth to the chain link is zero, so that the chain link is more suitable for being applied to a heavy load condition.

The plane may be an intersecting plane intersecting the arc-shaped plane. The advantages of adopting the intersecting surface as the meshing surface are as follows: the chain link has resistance to pulling away from the gear, and is not tangential and easy to disengage, but can be used within the range.

The intersecting surface is parallel to a tangential surface on the chain link; the included angle between the tangent point of the tangent plane on the arc-shaped surface continuous with the intersecting surface and the axis of the rear row of lugs and the axis connecting line of the front row of lugs and the rear row of lugs of the chain link to which the tangent plane belongs is beta, beta =360 DEG/number of teeth of the sprocket + n, wherein the number of teeth of the sprocket is an integer which is equal to 4, n = 0-3 DEG, the included angle between the upper intersection point of the intersecting surface on the arc-shaped surface connected with the intersecting surface and the axis of the rear row of lugs and the axis connecting line of the front row of lugs and the rear row of lugs is alpha, and alpha is larger than or equal to beta/2.

Furthermore, the arc surface can be an arc surface concentric with the axle center of the back row of lugs.

In the design of the mesh chain conveying system, it is necessary to ensure that not only the gear teeth can be smoothly and freely meshed with the chain links, but also the gear teeth can be smoothly and freely separated from the chain links. When the chain wheel rotates to enter a return stroke section, the meshing inclined plane of the chain plate needs to be separated from the chain wheel, the chain link drives the plane to rotate away from the tooth surface of the chain wheel, the arc-shaped surface of the chain link is in contact with the tooth surface of the gear tooth, if the chain link is separated from the situation that the chain link is in the arc-shaped surface, the arc-shaped surface drives the meshing surface of the gear tooth to be in contact and worn to form the plane or other shapes, so that the distance from the contact surface to the hole is smaller than the distance from other positions of the lugs to the hole, the chain link can rotate away from the hole, and the phenomenon of difficult chain hooking is generated.

In addition, the invention can also be provided with mutually continuous arc-shaped surfaces and flat surfaces on the surfaces of the lugs of the front chain link and the rear chain link facing the engaging groove respectively so as to facilitate bidirectional transmission.

Drawings

FIG. 1 is a schematic view of the structure of the present invention.

Fig. 2 is a schematic view of a part of the back side of an endless conveyor chain.

Fig. 3 shows a first embodiment of the chain link.

Fig. 4 shows a second construction of the chain link.

Figure 5 is a third structural view of the link.

Fig. 6 is a schematic view of a structure of a bi-directionally driven conveyor chain.

Detailed Description

As shown in fig. 1, 2 and 3, the present invention comprises at least one driving sprocket 1 and an annular conveying net chain 2 engaged with the driving sprocket 1, wherein a plurality of teeth 11 are uniformly distributed on each driving sprocket 1, the conveying net chain 2 comprises a plurality of chain links 21 sequentially inserted along the length direction of the conveying net chain 2, each chain link 21 is provided with a front row lug 211 and a rear row lug 212 along the length direction of the conveying net chain, and the front row lug and the rear row lug of the adjacent chain links 21 are staggered along the width direction of the conveying net chain 2 and are rotatably connected by a pin 22.

The back face of each link 21 is provided with an engaging groove 213, the surface of the back row of lugs 212 of the preceding link 21 adjacent to the link 21 provided with the engaging groove 213 is provided with an arc face 214 and a plane 215 which are continuous with each other, the arc face 214 and the plane 215 face the engaging groove 213, the arc face 214 is closer to the front face of the link 21 than the plane 215, and the arc face 214 forms a smooth transition connection with the front face of the link 21.

The arc surface 214 may be an arc surface concentric with the axis of the back row lug 212, and the arc surface 214 may also be an arc surface non-concentric with the axis of the back row lug, and the distance from the hole center to the position where the arc surface is tangent to the inclined surface is the largest and gradually decreases.

The tooth flanks of the teeth 11 of the drive sprocket 1 are bevelled and the chain links 21 mesh with the bevelled faces of the teeth 11 by means of their flat faces 215.

As shown in FIG. 3, the flat 215 of the back row of lugs 212 is a tangent plane to the arcuate surface 214.

And the included angle between the tangent point of the tangent plane on the continuous arc-shaped surface 214 and the connecting line L1 of the axes of the back row lugs 212 and the connecting line L2 of the axes of the front row lugs and the back row lugs of the chain link 21 to which the tangent plane belongs is beta.

β =360 °/sprocket tooth number + n, where the sprocket tooth number is an integer equal to or greater than 4, n is a link disengagement compensation angle, and n = 0-3 °.

The section is adopted as the engaging surface: as shown in fig. 3D 1 is the minimum distance from the pivot point in the radial direction to the back row of lugs 212, the link will disengage from the gear without resistance to distance increase.

As also shown in FIG. 4, the plane of the back row of lugs 212 is the intersection with the arcuate face 214.

And the intersecting planes are parallel to the tangent planes shown in fig. 3 on the links 21. And the included angle between the connecting line L3 of the upper intersection point of the intersecting surface on the arc-shaped surface 214 connected with the intersecting surface and the axle center of the back row of lugs and the connecting line L1 of the axle centers of the front row of lugs and the back row of lugs is alpha which is more than or equal to beta/2.

The advantages of adopting the intersecting surface as the meshing surface are as follows: as shown in FIG. 4 where D2 is the distance from the intersection point in the radial direction of the pin axis to the back row of lugs 212, the easy disengagement is not tangential due to the resistance of the D2 < D1 link to pull away from the gear, but can be used within the ranges described above.

As further shown in FIG. 5, the plane of the back row of lugs 212 that intersects or is tangent to the arcuate surface 214 is a planar-like arcuate surface.

In the conveyor chain shown in fig. 6, the surfaces of the lugs of the preceding and following links facing the engaging groove 213 are provided with arc-shaped surfaces and flat surfaces 215, respectively, which are continuous with each other. The structure can be used in a network chain conveying system for bidirectional transmission.

Claims

1. Be fit for the whole car of car and carry and the net chain conveying system that corrugated paper commodity circulation was carried, including drive sprocket and the annular conveying net chain of cooperation on drive sprocket, annular conveying net chain includes along a plurality of chain links that carry net chain length direction to peg graft in order, and every chain link sets up front-seat lug and back row lug respectively along the length direction of conveying net chain, along the width direction staggered arrangement of conveying net chain between the lug of adjacent chain link and rotate through the round pin axle and connect, and the back of every chain link sets up meshing groove, its characterized in that: the surface of a back row of lugs of a front chain link adjacent to the chain link provided with the meshing groove is provided with an arc-shaped surface and a plane which are continuous with each other, the continuous arc-shaped surface and the plane face the meshing groove, the arc-shaped surface is close to the front surface of the chain link compared with the plane, the tooth surface of a gear tooth of the transmission chain wheel is an inclined surface, and the chain link is meshed with the inclined surface of the gear tooth through the plane.

2. The mesh chain conveying system suitable for automobile whole vehicle conveying and corrugated paper logistics conveying is characterized in that: the plane is a tangent plane tangent to the arc-shaped surface.

3. The mesh chain conveying system suitable for automobile whole vehicle conveying and corrugated paper logistics conveying is characterized in that: an included angle between a tangent point of the tangent plane on the continuous arc-shaped surface and a connecting line of the axes of the rear row of lugs and a connecting line of the axes of the front row of lugs and the rear row of lugs of the chain link to which the tangent plane belongs is beta, and the included angle is beta =360 DEG/the number of teeth of the sprocket + n, wherein the number of the teeth of the sprocket is an integer which is equal to or greater than 4, and n = 0-3 deg.

4. The mesh chain conveying system suitable for automobile whole vehicle conveying and corrugated paper logistics conveying is characterized in that: the plane is an intersecting plane intersecting the arc-shaped surface.

5. The mesh chain conveying system suitable for automobile whole vehicle conveying and corrugated paper logistics conveying is characterized in that: the intersecting surface is parallel to a tangential surface on the chain link; the included angle between the tangent point of the tangent plane on the arc-shaped surface continuous with the intersecting surface and the axis of the rear row of lugs and the axis connecting line of the front row of lugs and the rear row of lugs of the chain link to which the tangent plane belongs is beta, beta =360 DEG/number of teeth of the sprocket + n, wherein the number of teeth of the sprocket is an integer which is equal to 4, n = 0-3 DEG, the included angle between the upper intersection point of the intersecting surface on the arc-shaped surface connected with the intersecting surface and the axis of the rear row of lugs and the axis connecting line of the front row of lugs and the rear row of lugs is alpha, and alpha is larger than or equal to beta/2.

6. The network chain conveying system suitable for automobile whole vehicle conveying and corrugated paper material flow conveying according to claim 1, 2, 3, 4 or 5, wherein the network chain conveying system comprises: the arc surface is an arc surface concentric with the axis of the back row of lugs.

7. The mesh chain conveying system suitable for automobile whole vehicle conveying and corrugated paper logistics conveying is characterized in that: the surfaces of the lugs of the front chain link and the rear chain link facing the engaging groove are respectively provided with an arc surface and a plane surface which are continuous with each other.