Driving device for walking system of heavy crawler tractor

Abstract

The invention provides a heavy crawler tractor walking system driving device which comprises a transmission box body and a driving shaft which are horizontally arranged, and the transmission box body is used for driving a transmission shaft to rotate and transmit; the transmission shaft is sleeved with a supporting wheel hub, a double-cone elastic ring is arranged between the supporting wheel hub and the transmission shaft, the outer circle of the double-cone elastic ring is in contact with the supporting wheel hub, and the inner circle of the double-cone elastic ring is in contact with the driving shaft; hub end covers are arranged on the opposite sides of the supporting wheel hub, and driving wheels are arranged on the outer sides of the supporting wheel hub and the hub end covers correspondingly; and a rubber track is wound outside the two groups of driving wheels. The problems that an existing heavy crawler tractor is low in running speed, large in load of a driving shaft and a bearing, low in reliability, complex in structure and large in adjustment difficulty can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural machinery, and in particular to a driving device for a traveling system of a heavy-duty crawler tractor. Background Art

[0002] Current crawler tractor products have heavy loads and high drive wheel strength requirements, so their structures are heavy and their reliability is low, which greatly limits the application and development of crawler tractors.

[0003] The current heavy-duty crawler tractor products use a cantilever structure to connect the drive shaft and the drive wheel hub. The drive shaft needs to bear the tension from the crawler travel system, the gravity of the whole machine and the driving torque. The load is large and the drive shaft is easily impacted by dynamic loads, which greatly reduces the service life of the shaft and bearings. This seriously weakens the advantage of heavy-duty crawler tractors in terms of large traction. The drive type mostly adopts segmented gear drive or segmented pin drive, and there is slippage between the drive wheel and the crawler, resulting in low drive efficiency.

[0004] The connection between the drive shaft and the wheel hub is usually made by flange bolt connection or spline connection. In order to meet the transmission of large torque, the flange bolt connection requires a larger flange surface, which is difficult to manufacture. The spline connection structure is complex and difficult to adjust. Summary of the invention

[0005] The purpose of the present invention is to provide a driving device for the travel system of a heavy-duty crawler tractor, which can solve the problems of low travel speed, large load on the drive shaft and bearings, low reliability, complex structure and great difficulty in adjustment of existing heavy-duty crawler tractors.

[0006] In order to achieve the above-mentioned object, the technical solution adopted by the present invention is: a heavy crawler tractor travel system driving device, comprising a horizontally arranged transmission box and a drive shaft, wherein the transmission box is used to drive the transmission shaft to rotate and transmit; A support wheel hub is sleeved on the transmission shaft, and a double-cone elastic ring is arranged between the support wheel hub and the transmission shaft, the outer circle of the double-cone elastic ring is in contact with the support wheel hub, and the inner circle of the double-cone elastic ring is in contact with the driving shaft; A hub end cover is provided on the opposite side of the supporting wheel hub, and driving wheels are provided on the outer sides of the supporting wheel hub and the hub end cover respectively; The two groups of driving wheels are wrapped with rubber tracks.

[0007] Preferably, the space between the supporting hub and the wheel hub end cover forms an empty slot, a frame is provided in the empty slot, and a bearing is provided between the bottom of the frame and the supporting hub and the wheel hub end cover.

[0008] Preferably, a floating oil seal is provided at a relative rotational position between the supporting hub, the hub end cover and the frame.

[0009] Preferably, the driving wheel is a thin-walled structure and has an S-shaped profile.

[0010] Preferably, the hub end cover is fixedly connected to the supporting hub by bolts.

[0011] Preferably, the transmission housing is connected to the drive shaft via a bearing transmission.

[0012] Preferably, the two groups of driving wheels are fixed to the supporting wheel hub and the outer side of the hub end cover by connecting bolts.

[0013] The beneficial effects of the present invention are: 1. This solution realizes the transmission of torque from the drive shaft to the drive wheel through the friction connection between the double-conical elastic ring, the support hub and the drive shaft. The double-conical elastic ring is compressed by its own axial bolts, which can cause the elastic ring to deform greatly in the radial direction, eliminate the matching clearance, and generate very high pressure between the support hub and the drive shaft, and transmit torque through the friction force generated by the pressure between the support hub and the drive shaft. The double-conical elastic ring has low requirements on the processing accuracy of the mating parts, simple structure, easy installation, easy disassembly, and can be used repeatedly.

[0014] 2. This solution adopts an S-shaped thin-walled structure drive wheel, which improves the strength and rigidity of the drive wheel and reduces the weight of the drive wheel and the entire machine.

[0015] 3. This solution separates the travel system load by adopting a composite wheel hub, i.e., a connecting device consisting of a supporting wheel hub and a wheel hub end cover, a frame and a center bearing, so that the drive shaft does not bear the tension of the travel system when the tractor is operating, effectively reducing the load on the drive shaft and improving the reliability of the drive shaft and the bearing.

[0016] 4. This solution effectively solves the heavy-duty crawler tractor's heavy-duty drive, reliability and installation adjustment problems, and can effectively promote the promotion and development of heavy-duty crawler tractors. At the same time, it has a certain reference significance for heavy-duty crawler vehicles and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of the present invention.

[0019] Figure 2 It is a schematic structural diagram of the driving connection device of the present invention.

[0020] Figure 3 It is a cross-sectional view of the present invention.

[0021] Figure 4 This is an application state diagram of the present invention.

[0022] In the figure, 1, rubber track; 2, driving wheel; 3, driving connecting device; 301, supporting wheel hub; 302, floating oil seal; 303, frame; 304, bearing; 305, wheel hub end cover; 306, connecting bolt; 307, double cone elastic ring; 4, driving shaft; 5, transmission box. DETAILED DESCRIPTION

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0025] At the same time, it should be noted that: unless otherwise defined, the technical terms or scientific terms used in this article should be the ordinary meaning understood by people with ordinary skills in the technical field to which the present invention belongs. The meaning of "multiple" used in the patent application specification and claims of the present invention is two or more; the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "front end", "rear end", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0026] The present invention is further described in detail below in conjunction with embodiments and with reference to the accompanying drawings.

[0027] The present invention discloses a driving device for a heavy crawler tractor travel system. Figure 1As shown, the embodiment includes a transmission box 5, a drive shaft 4, a drive connecting device 3, and two groups of drive wheels 2. The transmission box 5 and the drive shaft 4 are horizontally arranged in sequence, the transmission box 5 is connected to the drive shaft 4 through a bearing transmission, the drive connecting device 3 is sleeved on the transmission shaft, and the two groups of drive wheels 2 are symmetrically sleeved on the drive connecting device 3 to form a double-rim structure, and the two groups of drive wheels 2 are respectively wrapped with rubber tracks 1.

[0028] like Figure 2 , 3 As shown, the driving connection device 3 includes a support wheel hub 301, and a double cone elastic ring 307 is provided between the support wheel hub 301 and the transmission shaft, the outer circle of the double cone elastic ring 307 is in contact with the support wheel hub 301, and the inner circle of the double cone elastic ring 307 is in contact with the driving shaft 4. A hub end cover 305 is provided on the opposite side of the support wheel hub 301, and the hub end cover 305 is fixedly connected to the support wheel hub 301 by bolts. The two groups of driving wheels 2 are fixed to the outer sides of the support wheel hub 301 and the hub end cover 305 by connecting bolts 306. The driving wheel 2 is a thin-walled structure with an S-shaped profile, which improves the strength and rigidity of the driving wheel 2 and reduces the weight of the driving wheel 2 and the whole machine.

[0029] When installing the double-cone elastic ring 307, it is necessary to tighten the bolts on the double-cone elastic ring 307, so that the double-cone elastic ring 307 produces huge deformation and pressure in both the outer and inner directions, and realizes the connection with the support wheel hub 301 and the drive shaft 4 through pressure. When disassembling and adjusting the track gauge, it is only necessary to loosen the bolts on the double-cone elastic ring 307, and the double-cone elastic ring 307 loses pressure, and the support wheel hub 301 can slide freely on the drive shaft 4.

[0030] The space between the support hub 301 and the hub end cover 305 forms an empty slot, in which a frame 303 is arranged, and a bearing 304 is arranged between the bottom of the frame 303 and the support hub 301 and the hub end cover 305, so that the support hub 301, the hub end cover 305 and the frame 303 can rotate relative to each other. The support hub 301, the hub end cover 305 and the frame 303 have a relatively rotating position, and a floating oil seal 302 is used to achieve sealing to prevent muddy water and the like from corroding the bearing 304.

[0031] Figure 4 This is an application state diagram of the present invention. When driving, power is transmitted from the drive shaft 4 of the transmission box 5 to the support wheel hub 301 and the hub end cover 305 through the double-conical elastic ring 307, and then transmitted to the driving wheel 2. The driving wheel 2 transmits the driving force to the rubber track 1 through the friction force with the rubber track 1, driving the rubber track 1 to realize the movement of the entire machine.

[0032] The driving wheel 2, the supporting wheel hub 301 and the wheel hub end cover 305 rotate as a whole relative to the frame 303, and the floating oil seal 302 protects the bearing 304 from being eroded by external mud and water. The tension from the rubber track 1 is transmitted to the frame 303 through the supporting wheel hub, the wheel hub end cover 305 and the bearing 304. The driving shaft 4 does not bear the tension from the rubber track 1.

[0033] It should be noted that the parts not described in detail in the above embodiments are all prior art.

[0034] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention should be covered within the protection scope of the present invention.

Claims

1. A driving device for a heavy crawler tractor travel system, characterized in that: It comprises a horizontally arranged transmission housing (5) and a drive shaft (4), wherein the transmission housing (5) is used to drive the drive shaft to rotate; A support wheel hub (301) is sleeved on the transmission shaft, a double-cone elastic ring (307) is provided between the support wheel hub (301) and the transmission shaft, an outer circle of the double-cone elastic ring (307) and the support wheel hub (301) are in contact with each other, and an inner circle of the double-cone elastic ring (307) is in contact with the drive shaft (4); A wheel hub end cover (305) is provided on the opposite side of the supporting wheel hub (301), and driving wheels (2) are provided on the outer sides of the supporting wheel hub (301) and the wheel hub end cover (305); The two sets of driving wheels (2) are provided with rubber tracks (1) wrapped around the outside.

2. A heavy crawler tractor travel system driving device according to claim 1, characterized in that: The space between the supporting hub (301) and the hub end cover (305) forms an empty slot, a frame (303) is arranged in the empty slot, and a bearing (304) is arranged between the bottom of the frame (303) and the supporting hub (301) and the hub end cover (305).

3. A heavy crawler tractor travel system driving device according to claim 2, characterized in that: A floating oil seal (302) is provided at a relative rotational position between the supporting hub (301), the hub end cover (305) and the frame (303).

4. The driving device of the heavy crawler tractor travel system according to claim 1, characterized in that: The driving wheel (2) is a thin-walled structure and has an S-shaped profile.

5. The driving device of the heavy crawler tractor travel system according to claim 1, characterized in that: The hub end cover (305) is fixedly connected to the supporting hub (301) via bolts.

6. The driving device of the heavy crawler tractor travel system according to claim 1, characterized in that: The transmission housing (5) is connected to the drive shaft (4) via a bearing transmission.

7. The driving device of the heavy crawler tractor travel system according to claim 1, characterized in that: The two sets of driving wheels (2) are fixed to the outer sides of the supporting wheel hub (301) and the wheel hub end cover (305) via connecting bolts (306).

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