CN209901200U

CN209901200U - Lower chain wheel tooth-shaped transmission structure of plate chain elevator

Info

Publication number: CN209901200U
Application number: CN201920354156.8U
Authority: CN
Inventors: 任建军
Original assignee: Wuxi Xitong Engineering Machinery Co Ltd
Current assignee: Wuxi Xitong Engineering Machinery Co Ltd
Priority date: 2019-03-19
Filing date: 2019-03-19
Publication date: 2020-01-07
Anticipated expiration: 2029-03-19

Abstract

The utility model relates to a sprocket profile of tooth transmission structure under plate chain lifting machine, including lower sprocket shaft, lower sprocket shaft swivelling joint cambered surface profile of tooth sprocket, cambered surface profile of tooth sprocket periphery connection plate chain rotates on the plate chain and sets up plate chain roller, plate chain outside installation dustpan. The two sides of the chain teeth on the cambered surface tooth-shaped chain wheel in the thickness direction are side cambered surfaces. The chain teeth on the cambered surface tooth-shaped chain wheel are provided with circumferential cambered surfaces at two sides in the arc direction, and sharp corner tip circles between the cambered surfaces are arranged between the circumferential cambered surfaces. The utility model discloses a change sprocket profile of tooth structure reinforcing plate chain positioning action on the tooth's socket and prevent chain jump and top tooth.

Description

Lower chain wheel tooth-shaped transmission structure of plate chain elevator

Technical Field

The utility model belongs to traffic industry asphalt concrete agitated vessel field relates to a chain hoist lower sprocket profile of tooth transmission structure.

Background

In asphalt concrete mixing plants, plate chain hoists are mainly used to lift hot aggregates (stones with a size of 0.5-40 mm). The lower chain wheel of the existing elevator generally adopts two structures, namely a smooth wheel (shown in figure 5) or a standard tooth-shaped chain wheel (shown in figure 4) and the like, and passively rotates in the working process. Although the lower chain wheel mechanism of the elevator is provided with a tensioning structure to ensure that the chain wheel is completely meshed with the plate chain, the smooth wheel (shown in figure 1) has small positioning area when no toothed plate chain rolls on the smooth wheel, so that once the plate chain is jumped too much, the plate chain jumps to cause halt, but the plate chain is generally not damaged, and the repair is easy. The positioning function of the standard tooth-shaped chain wheel (shown in figure 2) is obviously better than that of a smooth wheel, but when the size of the lifted aggregate is larger, the aggregate with proper size is sometimes embedded in a tooth groove, so that a roller of a plate chain is propped by a stone to be separated from the tooth groove when being meshed, the roller is propped on a tooth top circle with a circular arc surface of the chain wheel during rotation, the chain is jumped, and the top tooth of the plate chain even can break the chain strip when serious, and the maintenance is quite difficult.

Disclosure of Invention

An object of the utility model is to provide a sprocket profile of tooth structure under plate chain lifting machine can solve foretell problem, utilizes sprocket driven characteristics down, prevents to jump chain and top tooth through the positioning action that changes sprocket profile of tooth structure reinforcing plate chain on the tooth's socket.

According to the utility model provides a technical scheme: the lower chain wheel tooth-shaped transmission structure of the plate chain hoister comprises a lower chain wheel shaft, wherein the lower chain wheel shaft is rotatably connected with a cambered surface tooth-shaped chain wheel, the periphery of the cambered surface tooth-shaped chain wheel is connected with a plate chain, a plate chain roller is rotatably arranged on the plate chain, a bucket is arranged on the outer side of the plate chain, and two ends of the lower chain wheel shaft are rotatably connected with the cambered surface tooth-shaped chain wheel through bearings.

As a further improvement, the chain teeth on the cambered surface tooth-shaped chain wheel are side cambered surfaces on two sides of the thickness direction of the chain teeth.

As a further improvement, the sprocket on the cambered surface tooth-shaped sprocket is a circumference cambered surface on both sides of the arc direction of the sprocket, and a top circle of a closed angle between the cambered surfaces of the circumference cambered surfaces.

Compared with the prior art, the utility model, have following advantage:

1. the utility model has simple structure and small occupied space; by reducing the contracted tooth form, the side plates and the rollers of the plate chain are easy to be meshed and positioned by utilizing the large smooth transition tooth form structure in two directions, and the plate chain cannot jump even if the plate chain has large fluctuation in the running process.

2. The utility model discloses be a line with the addendum shrink, when taking place unusual in the course of the work plate chain roller top when the addendum, be the arc surface and the line contact of roller, be unstable, the roller that has the rotational degree of freedom can slide along the notched arc surface naturally and fall into the tooth's socket at last and resume the location again to because the sprocket is driven, no matter the roller slides to that one side, the sprocket can rotate along the atress direction, can both guarantee the stable work of sprocket chain.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a main sectional structural view of fig. 1.

Fig. 3 is a side sectional structural view of fig. 1.

Fig. 4 is a schematic structural diagram of a prior art photo wheel.

FIG. 5 is a schematic view of a prior art standard tooth sprocket.

Fig. 6 is a schematic structural view of the present invention when the tooth-pushing occurs.

Detailed Description

The following description will further describe embodiments of the present invention with reference to the accompanying drawings.

In the figures 1-3, the plate chain comprises a cambered surface tooth-shaped chain wheel 1, a plate chain 2, a plate chain roller 3, a bucket 4, a lower chain wheel shaft 5, a double-side cambered surface tooth form 6, an axial cambered surface tooth form 7, a sharp corner top circle 8 between cambered surfaces and the like.

As shown in figure 1, the utility model relates to a sprocket profile of tooth transmission structure under plate chain lifting machine, including

lower sprocket shaft

5, 5 both ends of lower sprocket shaft are passed through the bearing and are rotated and connect cambered surface profile of tooth sprocket 1, and 1 periphery of cambered surface profile of tooth sprocket connects plate chain 2, rotates on the plate chain 2 and sets up plate chain roller 3, and the dustpan 4 is installed in the 2 outside of plate chain.

As shown in fig. 3, the two sides of the chain teeth on the cambered surface toothed chain wheel 1 in the thickness direction are provided with side cambered surfaces 6, and the cambered surface toothed chain wheel 1 has gradual transition when being embedded into the plate chain 2 through the side cambered surfaces 6, so that the matching is smoother. As shown in FIG. 2, two sides of the arc direction are circumferential arc surfaces 7, and a tip circle 8 with a sharp corner between the arc surfaces is arranged between the circumferential arc surfaces 7. As shown in fig. 6, when the curved toothed sprocket 1 and the plate chain roller 3 are in contact during abnormal operation (top tooth), the inter-arc sharp corner apex circle 8 is the contact part of the inter-arc sharp corner apex circle 8 and the plate chain roller 3, the inter-arc sharp corner apex circle 8 and the plate chain roller 3 are in line contact, the friction force is small, the curved toothed sprocket 1 and the plate chain roller 3 slide, and the curved toothed sprocket 1 falls into the tooth groove of the plate chain 2.

The working process of the utility model is as follows: as shown in figure 1, a plate chain 2 of the hoisting machine is driven by a power device (a chain wheel device) to move in the direction shown in the figure, and aggregate is placed in a bucket 4. The cambered surface toothed chain wheel 1 is driven by the plate chain 2 to rotate around the lower chain wheel shaft 5 passively according to the direction shown in the figure, the plate chain rollers 3 are embedded into tooth grooves of the cambered surface toothed chain wheel 1 according to the designed pitch, and the cambered surface toothed chain wheel 1 has gradual transition when being embedded into the plate chain 2 through the side cambered surfaces 6, so that the matching is smoother, the centering performance is good, and the chain cannot be jumped and connected. When aggregates with proper size are embedded in tooth grooves of the cambered surface toothed sprocket 1 in the working process, a contact phenomenon, namely top teeth, sometimes occurs between the top circle 8 of the sharp angle between the cambered surfaces of the cambered surface toothed sprocket 1 and the plate chain roller 3 (as shown in figure 6). The top circle 8 of the sharp corner between the cambered surfaces is in line contact with the plate chain roller 3 and is in an unstable state, the friction force is small, the tooth surface of the cambered surface toothed chain wheel 1 slides with the plate chain roller 3, the plate chain roller 3 falls into the tooth socket of the cambered surface toothed chain wheel 1 to recover the positioning again, and the cambered surface toothed chain wheel 1 is in passive transmission, so that the cambered surface toothed chain wheel 1 can rotate along the stress direction no matter which surface the plate chain roller 3 slides to, and the plate chain 2 is ensured to drive the dustpan 4 to work stably.

Claims

1. The utility model provides a chain wheel profile of tooth transmission structure under plate chain lifting machine which characterized in that: the structure includes sprocket shaft (5) down, sprocket shaft (5) rotate to connect cambered surface profile of tooth sprocket (1) down, cambered surface profile of tooth sprocket (1) periphery connection flat-plate link chain (2), rotate on flat-plate link chain (2) and set up flat-plate link chain roller (3), dustpan (4) is installed in flat-plate link chain (2) outside.

2. The toothed transmission structure of the lower chain wheel of the plate chain elevator as claimed in claim 1, wherein: the two sides of the chain teeth on the cambered surface tooth-shaped chain wheel (1) in the thickness direction are provided with side cambered surfaces (6).

3. The toothed transmission structure of the lower chain wheel of the plate chain elevator as claimed in claim 1, wherein: the chain teeth on the cambered surface tooth-shaped chain wheel (1) are provided with circumferential cambered surfaces (7) at two sides in the arc direction, and top circles (8) with sharp corners between the cambered surfaces are arranged between the circumferential cambered surfaces (7).

4. The toothed transmission structure of the lower chain wheel of the plate chain elevator as claimed in claim 1, wherein: and two ends of the lower chain wheel shaft (5) are rotatably connected with the cambered surface tooth-shaped chain wheel (1) through bearings.