CN114604331A

CN114604331A - High-speed heavy-load rubber track for tracked vehicle

Info

Publication number: CN114604331A
Application number: CN202011447004.6A
Authority: CN
Inventors: 韩成勇; 蔡庆; 贾云海
Original assignee: Beijing Research and Design Institute of Rubber Industry
Current assignee: Beijing Research and Design Institute of Rubber Industry
Priority date: 2020-12-09
Filing date: 2020-12-09
Publication date: 2022-06-10

Abstract

The invention provides a rubber crawler belt, which is provided with a strip belt made of rubber, wherein the strip belt is connected end to end through an end connector and a middle connector to form an annular belt; a certain amount of metal core metal, a pressing plate, steel wire cords and a plurality of layers of fiber cords with certain angles are vulcanized in the rubber track, so that the rubber track has higher transverse rigidity, radial rigidity and torsional rigidity, the problems of tooth jumping and belt release of the rubber track can be avoided when a vehicle runs under the condition of high speed and heavy load, and larger driving force can be stably and efficiently transmitted.

Description

High-speed heavy-load rubber track for tracked vehicle

Technical Field

The present invention relates to a rubber crawler technology for vehicle running, and more particularly, to a rubber crawler suitable for use in high-speed heavy-duty crawler vehicles.

Background

Present metal track drive structure has the engaging of slab tooth, the structural style of three kinds of transmission drive power of slab hole meshing and tooth meshing, but if the track area body itself trades the rubber material from the metal material, because the soft characteristic of rubber products itself, these three kinds of drive forms all can be because during drive wheel transmission moment of torsion, let the soft rubber body take place to warp, and then probably take place "jump the tooth" phenomenon, promptly at the transmission in-process, the tooth that should mesh on the drive wheel, from the meshing position slippage, jump to the position that will take place the meshing, this kind of impact can be at jumping the tooth position and produce great stress to rubber track and drive wheel, thereby produce the inside damage of rubber track, can harm the driving system of vehicle even.

However, the rubber crawler belt has the following advantages: the road surface vibration damping device has the advantages of light weight, low noise, small vibration, small damage to the road surface, energy conservation and environmental protection, and has wide application prospect in the military and civil fields.

Therefore, a set of reasonable crawler structure is designed to ensure the stable and smooth movement of the rubber crawler, which is the key for the success and failure of the rubber crawler technology, and if the design is reasonable, the phenomena of 'tooth jumping' and belt releasing of the crawler in the driving process can be avoided.

Disclosure of Invention

Problems to be solved by the invention

The present invention has been made in view of the above problems, and an object of the present invention is to provide a rubber crawler capable of effectively preventing a tooth skipping phenomenon and a belt releasing phenomenon from occurring in a rubber crawler when a vehicle travels at a high speed and under a heavy load, and capable of smoothly and efficiently transmitting a large driving force.

(II) means for solving the problems

The occurrence of tooth jumping and belt releasing of the rubber track is caused by the flexibility of the rubber track belt body, and the transverse rigidity, the radial rigidity and the torsional rigidity of the rubber track are enhanced on the structure of the rubber track, so that when a vehicle turns, and the vehicle is subjected to transverse and longitudinal friction force of the ground to the track, vehicle gravity and traction force transmitted by a driving wheel, the rubber track body cannot generate large transverse and torsional deformation, and the occurrence of tooth jumping and belt releasing is avoided.

In the transmission mode of the driving force, the rubber track transmission mode is tooth-tooth meshing, and the transmission mode has the advantages of high transmission efficiency, long service life, stable transmission, high reliability, constant transmission ratio and the like, so that the rubber track transmission mode has great benefits for the stable running of vehicles, and plays a key role in the design of a proper driving gear profile curve and a proper pressure angle.

(III) technical scheme

The rubber crawler belt is a strip-shaped crawler belt and is connected end to form an annular belt, a certain amount of metal core gold, steel wire cords and a plurality of layers of fiber cords are vulcanized in the rubber crawler belt, wherein the direction of steel wires in the steel wire cords is along the longitudinal length direction of the crawler belt.

In order to improve the transverse rigidity and the torsional rigidity of the rubber track, a plurality of fiber cord layers are laid in the rubber track, the fiber cord layers are generally in an even number, each layer of fiber cord has a certain angle, the longitudinal direction of the track is set to be 0 degree, and the angle of the fiber cord is generally-30 degrees to 30 degrees. When the rubber track is tensioned, the fiber cord and the steel cord layer are tightened, and the fiber cord and the steel cord layer and the core metal pressing plate provide enough transverse rigidity, radial rigidity and torsional rigidity for the track, so that the requirement of stable running of the rubber track when a tracked vehicle moves straight and turns is met.

The core gold clamp plate in the track can provide radial direction rigidity for the track, namely when the vehicle bogie wheel is pressed on the track, and the track bears the vehicle heavy load, the track can not deform greatly, so that the problems of tooth jumping and belt releasing can be caused.

The present invention also provides a track driving structure of a tooth-and-tooth engagement type, which can effectively transmit the driving force of a ring gear of a driving wheel to a rubber track when a vehicle runs at a high speed to be used as the running power.

1, at the meshing position, the design of the arc curve pattern of the tooth-shaped working surface of the driving gear ring driving teeth and the crawler belt driving teeth is very critical;

2 at the meshing position, the design of the clearance between the driving teeth of the driving wheel gear ring and the driving teeth of the crawler belt is also important, the clearance distance is 0 mm-2 mm, and the design of the clearance distance is ensured by the design of the arcs of the working surfaces of the driving teeth and the driven teeth and the depth of the driven teeth inserted into the driving tooth grooves. The depth is determined by the structural design of the crawler belt body and the structural design of the driving wheel gear ring;

3 at the meshing part of the figure 3, the pressure angle of the driving structure is 10-16 degrees.

Drawings

FIG. 1 is a plan view of a rubber crawler of the present invention

FIG. 2 is a bottom view of a rubber crawler of the present invention

FIG. 3 is a perspective view of a core metal and pressing plate assembly

FIG. 4 is a perspective view of the end-to-end connection of the crawler belt through the connector

FIG. 5 is a schematic view of the driving structure of the rubber track and the driving wheel gear ring in the invention.

Detailed description of the invention

The invention relates to a rubber track for a high-speed tracked vehicle, which defines the transverse direction and the longitudinal direction of the track according to arrows shown in figure 1.

Fig. 1 and 2 show a partial pitch structure of a rubber track, which can be designed with different pitch numbers of track sections in the longitudinal direction.

Fig. 4 shows the track segments connected end to end by end connectors 41 and intermediate connectors 42 to form a rubber track belt.

In the rubber crawler, the core metal and the pressing plate 33 are connected into a whole through the connecting bolt and are embedded in the rubber body, the steel wire cord layer and a part of the fiber cord layer are clamped, the fiber cord layer with an angle is also paved outside the core metal and the pressing plate, the angle of the fiber cord layer is generally-30 degrees to 30 degrees, and when the crawler is tensioned, the core metal, the pressing plate, the steel wire cord layer and the fiber cord layer are taken as a whole, so that the transverse rigidity, the radial rigidity and the torsional rigidity of the rubber crawler can be well enhanced.

As shown in figure 3, the core metal is integrally cast by alloy steel, the two sides of the core metal are provided with driving teeth 31 which are matched with a driving wheel gear ring to transmit driving force, and the middle part is provided with a guide tooth 32, so that the crawler belt can not generate transverse deviation when a vehicle runs, and the belt is prevented from being detached.

The gear ring is fixed on the driving wheel through a bolt, and the driving teeth of the rubber crawler belt are matched with the driving teeth of the gear ring of the driving wheel to form a driving relation.

Through track body structural design and drive wheel ring gear structural design, can design out in the meshing position, the clearance d of ring gear drive tooth and track drive tooth is 0mm ~2 mm.

The driving teeth on the gear ring are composed of a tooth top circular arc R1, a transition circular arc R2 and a working surface circular arc R3. The addendum arc R1 determines the diameter of the ring gear of the driving wheel. The transition arc R2 is for smooth connection between the tooth top arc and the face arc R3. The working face arc R3 interacts with the caterpillar driven tooth working face arc R4 to transmit the driving force to the caterpillar driving tooth, and the pressure angle alpha k generated by the structure at the position of figure 5 is 10-16 degrees.

When the crawler belt is driven, the pressure angle can be used as an important index for judging the transmission force performance of the transmission mechanism, and the smaller the pressure angle is, the larger the component force of the acting force along the tangential speed direction is, namely the larger the transmission force is, the better the transmission performance of the mechanism is. The larger the pressure angle, the less work is actually useful, it only increases the friction torque, but it is unavoidable. For the above reasons, the smaller the pressure angle seems the better, but the smaller the pressure angle the more lean the drive teeth of the ring gear and the lower the bending strength and the more likely damage will occur. Therefore, the overall strength of the transmission mechanism must be analyzed through finite element mechanical analysis and calculation, and a suitable pressure angle is obtained after comprehensive consideration.

The efficiency of converting positive pressure into driving force of the rubber track is 96.6%, and after finite element analysis and calculation, the maximum stress in the transmission mechanism is far less than the yield strength of the material in the transmission process. The structure can stably and safely deal with the sudden events in the motion process while efficiently converting the driving force.

Claims

1. A rubber crawler belt has a rubber strip belt, which is connected end to end by end connectors and middle connectors to form an annular belt; in the rubber crawler belt, there are certain amount of metal core, pressing board, steel cord and several layers of fiber cord with certain angle.

2. The core metal of claim 1 is fastened to the pressing plate by connecting bolts, and the steel cord layer between the core metal and the pressing plate is compressed.

3. The rubber crawler of claim 1 wherein said fiber cord has an angle of-30 ° to 30 ° and a number of layers of 2 to 6.

4. A rubber track core metal drive tooth as defined in claim 1, wherein the track drive tooth structure is comprised of a tooth crest arc and a face surface arc, wherein the face surface arc cooperates with the drive tooth face arc of the drive wheel ring gear to transmit drive power.

5. The rubber track of claim 1, wherein the gap between the drive teeth of the ring gear of the drive wheel and the drive teeth of the rubber track is 0mm to 2mm when the rubber track is engaged.

6. The rubber track of claim 1, wherein the drive structure has a pressure angle in the range of 10 ° to 16 °.