Crawler tractor

Abstract

The present invention discloses a crawler tractor, comprising: a chassis, the chassis includes a connecting frame and two crawler walking parts, the two crawler walking parts are respectively arranged on both sides of the connecting frame and connected to the connecting frame; the chassis is provided with a traction device, a bottom-lifting device and a winch device that can be lifted and telescoped. This tractor has a compact structure, eliminates the drawback that the traction capacity of the tractor decreases when the roadway gradient becomes larger, and hardly increases the distance between the belt conveyor and the side wall of the roadway due to the use of the tractor, facilitating the transportation of pedestrians and vehicles.

Description

Technical Field

[0001] The present invention relates to the technical field of crawler tractors, and in particular to a crawler tractor for towing the tail of a retractable belt conveyor in a tunneling equipment. Background Art

[0002] When blasting operations have to be carried out in a coal roadway driving face when encountering hard rocks, in order to prevent the roadheader from being damaged by the impact of the rock blocks generated by the blasting, it is necessary to tow the tail of the supporting retractable belt conveyor in a large amplitude away from the driving face. On this basis, the roadheader can retreat in a large amplitude away from the blasting operation point. The existing crawler belt conveyor self - moving tail, as well as the bottom - lifting and step - moving self - moving belt conveyor tail, have a large volume. It is necessary to increase the distance between the retractable belt conveyor and the side wall of the roadway. In this way, it will inevitably seriously affect the auxiliary transportation and pedestrians, so it is difficult to be popularized and applied.

[0003] Chinese Utility Model Patent CN209427743U discloses a self - moving belt conveyor tail for a driving face, which is provided with a lifting device on the chassis. This tail can not only move itself away from the driving face, facilitating the retreat of the roadheader from the construction operation site, but also can mechanically lift and load large - weight equipment parts, barreled grease and rolled tapes at the construction operation site, which can significantly improve the construction efficiency. However, due to the reason of climbing slopes, the traction force provided by this crawler tractor is significantly reduced, and it is difficult to meet the traction force requirements for the heavy - duty belt conveyor tail to climb slopes. Summary of the Invention

[0004] Aiming at the above - mentioned defects of the prior art, the present invention provides a crawler tractor to eliminate the disadvantage of the decrease in the towing capacity of the tractor when the slope of the roadway becomes larger. This tractor has a compact structure and hardly increases the distance between the retractable belt conveyor and the side wall of the roadway due to the use of the tractor, without affecting the normal transportation of pedestrians and vehicles.

[0005] To solve the above - mentioned technical problems, a crawler tractor adopted by the present invention includes: a chassis, the chassis includes a connecting frame and two crawler walking parts, and the two crawler walking parts are respectively arranged on both sides of the connecting frame and connected to the connecting frame; the chassis is provided with a traction device and a winch device; the winch device includes a winch telescopic sleeve, the winch telescopic sleeve includes a winch inner sleeve, a winch outer sleeve and a winch telescopic oil cylinder, the winch inner sleeve is inserted into the winch outer sleeve and is slidably connected to the winch outer sleeve, the winch telescopic oil cylinder is connected between the winch inner sleeve and the winch outer sleeve, and one end of the winch telescopic sleeve is connected to the chassis.

[0006] Among them, the car stabilizing device is also provided with a car stabilizing base, a car stabilizing swing cylinder and a car stabilizing tray. The car stabilizing base is installed on the chassis, one end of the car stabilizing outer sleeve is hinged to the car stabilizing base through a pin shaft, the car stabilizing swing cylinder is hinged between the car stabilizing outer sleeve and the car stabilizing base, and the car stabilizing tray is hinged to the car stabilizing inner sleeve.

[0007] Among them, the stabilizing base includes a U-shaped body, which straddles the top of the crawler walking part and is fixedly installed on the crawler walking part through the U-shaped body. The U-shaped body is provided with two connecting ears, one of which is hinged to the stabilizing outer sleeve through a pin, and the other connecting ear is hinged to the stabilizing swing cylinder through a pin.

[0008] Wherein, the traction device is a traction telescopic oil cylinder, and one end of the traction telescopic oil cylinder is connected to the chassis.

[0009] Among them, the chassis is also provided with a bottom lifting device, and the bottom lifting device includes a bottom lifting telescopic sleeve, and the bottom lifting telescopic sleeve includes a bottom lifting inner sleeve, a bottom lifting outer sleeve and a bottom lifting telescopic cylinder. The bottom lifting outer sleeve is installed on the chassis, the bottom lifting inner sleeve is inserted into the bottom lifting outer sleeve and is slidably connected with the bottom lifting outer sleeve, and the bottom lifting telescopic cylinder is arranged between the bottom lifting inner sleeve and the bottom lifting outer sleeve.

[0010] Among them, there are four bottom-lifting telescopic sleeves, which are respectively arranged at the front left end, front right end, rear left end and rear right end of the chassis.

[0011] Compared with the prior art, the advantages of the present invention are:

[0012] 1) Since a vehicle stabilizing device and a traction device are provided on the chassis, when the tractor is operating in a lane with a small angle and approximately horizontal, the tail of the retractable belt conveyor can be towed during the self-propelled process, which is very fast and efficient. When the tractor is operating in a lane with a large angle and climbing, it first reaches the predetermined position by self-propelled mode, then uses the vehicle stabilizing device to support the top plate of the lane to stabilize the tractor, and then uses the tractor as the force point of the traction device to tow the tail of the retractable belt conveyor. On the one hand, using the traction device to tow the tail of the retractable belt conveyor eliminates the disadvantage that the traction capacity of the crawler tractor decreases due to the increase in the lane slope, so that the present invention has very good adaptability to the change in the lane slope; on the other hand, the volume of the tractor does not need to be increased due to the decrease in traction force due to the increase in the lane slope, so the use of the tractor will hardly increase the distance between the retractable belt conveyor and the side of the lane, thereby affecting the normal transportation of pedestrians and vehicles.

[0013] 2) When the tractor gets stuck in a quagmire and cannot pass through smoothly, the chassis is lifted upward by the bottom-lifting telescopic sleeve so as to facilitate inserting hard objects under the crawlers to get the tractor out of trouble; or when the roadway floor is uneven and the crawler tractor affects the normal operation of the extensible belt conveyor, the chassis is lifted upward by the bottom-lifting telescopic sleeve so as to level the tractor.

[0014] 3) It is simple and safe to operate, and there is no heavy physical labor throughout the process.

[0015] 4) During the process of towing the tail of the belt conveyor, it will not cause obvious damage to the roof and floor of the roadway. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of an embodiment of the crawler tractor of the present invention;

[0017] In the figure: 1 - crawler walking part, 2 - connecting frame, 3 - winch base, 4 - winch swing oil cylinder, 5 - winch telescopic sleeve, 6 - winch tray, 7 - bottom-lifting telescopic sleeve, 8 - traction telescopic oil cylinder. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The technical solution of the present invention will be described in detail below in conjunction with the drawings and specific embodiments to further understand the purpose, solution and efficacy of the present invention, but it is not intended to limit the scope of protection of the appended claims of the present invention.

[0019] As Figure 1 shown, a crawler tractor, its chassis includes a connecting frame 2 and two crawler walking parts 1, and the two crawler walking parts 1 are respectively arranged on both sides of the connecting frame 2 and connected to the connecting frame 2; the chassis is provided with a traction device, a liftable winch device and a bottom-lifting device.

[0020] The winch device includes a winch telescopic sleeve 5, and the winch telescopic sleeve 5 includes a winch inner sleeve, a winch outer sleeve and a winch telescopic oil cylinder. The winch inner sleeve is inserted into the winch outer sleeve and is slidably connected to the winch outer sleeve. The winch telescopic oil cylinder is connected between the winch inner sleeve and the winch outer sleeve. One end of the winch inner sleeve is hinged with a winch tray 6, and one end of the winch outer sleeve is hinged with a winch base 3, and the winch base 3 is installed on the chassis. In order to adjust the angle of the winch telescopic sleeve 5, a winch swing oil cylinder 4 is hinged between the winch outer sleeve and the winch base 3. Of course, from the perspective of simplifying the structure, the winch base 3 and the winch tray 6 can also be omitted, and the winch telescopic sleeve 5 can be directly installed on the chassis.

[0021] In this embodiment, the winch base 3 includes a U-shaped body. The winch base 3 straddles above the crawler-type traveling unit 1 and is fixedly installed on the crawler-type traveling unit 1 through the U-shaped body. The U-shaped body is provided with two connecting lugs. One connecting lug is hinged to the winch outer sleeve through a pin shaft, and the other connecting lug is hinged to the winch swing oil cylinder 4 through a pin shaft. In this way, the force generated when the winch device presses against the roof of the roadway is directly transmitted to the floor of the roadway through the crawler traveling unit 1, and the force on the whole vehicle is more reasonable.

[0022] As Figure 1 shown, the traction device is a traction telescopic oil cylinder 8. One end of the traction telescopic oil cylinder 8 is connected to the chassis (in this embodiment, the traction telescopic oil cylinder 8 is arranged on the connecting frame 2), and the other end is used to connect to the traction steel wire rope or the traction chain.

[0023] As Figure 1 shown, the bottom-lifting device is arranged on the connecting frame 2 of the chassis. The bottom-lifting device includes four bottom-lifting telescopic sleeves 7, which are respectively arranged at the front left end, front right end, rear left end and rear right end of the chassis. The bottom-lifting telescopic sleeve 7 includes a bottom-lifting inner sleeve, a bottom-lifting outer sleeve and a bottom-lifting telescopic oil cylinder. The bottom-lifting outer sleeve is installed on the chassis. The bottom-lifting inner sleeve is inserted into the bottom-lifting outer sleeve and is slidably connected to the bottom-lifting outer sleeve. The bottom-lifting telescopic oil cylinder is arranged between the bottom-lifting inner sleeve and the bottom-lifting outer sleeve. The function of the bottom-lifting device is that when the tractor gets stuck in the mire and cannot pass smoothly, the chassis is lifted upward through the bottom-lifting telescopic sleeves 7 so as to pad hard objects under the crawlers to get the tractor out of trouble; or when the roadway floor is uneven and the crawler-type tractor affects the normal operation of the extensible belt conveyor, the chassis is lifted upward through the bottom-lifting telescopic sleeves 7 so as to level the tractor.

[0024] In the state where the bottom-lifting telescopic sleeves of the bottom-lifting device are extended, in order to prevent the tractor from walking due to misoperation and causing damage to the bottom-lifting telescopic sleeves, a hydraulic linkage device is arranged between the hydraulic motor of the tractor traveling unit and the bottom-lifting telescopic oil cylinder. This hydraulic linkage device ensures that the bottom-lifting telescopic sleeves are fully retracted before the hydraulic motor of the tractor traveling unit starts to move.

[0025] In summary, all kinds of non-substantive local changes made based on the concept, principle, structure and method of the present invention are within the protection scope of the present invention.

Claims

1. A crawler tractor, comprising: A chassis, the chassis includes a connecting frame and two crawler walking parts, the two crawler walking parts are respectively arranged on both sides of the connecting frame and connected to the connecting frame; characterized in that, The chassis is provided with a traction device and a vehicle stabilizing device; the vehicle stabilizing device includes a vehicle stabilizing telescopic sleeve, the vehicle stabilizing telescopic sleeve includes a vehicle stabilizing inner sleeve, a vehicle stabilizing outer sleeve and a vehicle stabilizing telescopic oil cylinder, the vehicle stabilizing inner sleeve is inserted into the vehicle stabilizing outer sleeve and is slidably connected to the vehicle stabilizing outer sleeve, the vehicle stabilizing telescopic oil cylinder is connected between the vehicle stabilizing inner sleeve and the vehicle stabilizing outer sleeve, and one end of the vehicle stabilizing telescopic sleeve is connected to the chassis; The vehicle stabilizing device is further provided with a vehicle stabilizing base, a vehicle stabilizing swing oil cylinder and a vehicle stabilizing tray, the vehicle stabilizing base is installed on the chassis, one end of the vehicle stabilizing outer sleeve is hinged to the vehicle stabilizing base through a pin shaft, the vehicle stabilizing swing oil cylinder is hinged between the vehicle stabilizing outer sleeve and the vehicle stabilizing base, and the vehicle stabilizing tray is hinged to the vehicle stabilizing inner sleeve; The chassis is further provided with a chassis lifting device, the chassis lifting device includes a chassis lifting telescopic sleeve, the chassis lifting telescopic sleeve includes a chassis lifting inner sleeve, a chassis lifting outer sleeve and a chassis lifting telescopic oil cylinder, the chassis lifting outer sleeve is installed on the chassis, the chassis lifting inner sleeve is inserted into the chassis lifting outer sleeve and is slidably connected to the chassis lifting outer sleeve, and the chassis lifting telescopic oil cylinder is arranged between the chassis lifting inner sleeve and the chassis lifting outer sleeve; The vehicle stabilizing base includes a U-shaped body, the vehicle stabilizing base straddles above the crawler walking part and is fixedly installed on the crawler walking part through the U-shaped body, the U-shaped body is provided with two connecting ears, one connecting ear is hinged to the vehicle stabilizing outer sleeve through a pin shaft, and the other connecting ear is hinged to the vehicle stabilizing swing oil cylinder through a pin shaft; The traction device is a traction telescopic oil cylinder, and one end of the traction telescopic oil cylinder is connected to the chassis.

2. The crawler tractor according to claim 1, wherein There are four chassis lifting telescopic sleeves, which are respectively arranged at the front left end, front right end, rear left end and rear right end of the chassis.

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