Automatically adjustable track tensioning device

Abstract

The present invention proposes an automatically adjustable track tensioning device, comprising a reduction motor, a cross-axis universal coupling, a worm, a pin, a first copper sleeve, a worm wheel, a first adjustment pad, a second copper sleeve, a front baffle, a rear baffle, a second adjustment pad, a retaining spring, a third copper sleeve, a fourth copper sleeve, an adjuster bracket, a crank arm and a connecting support. The device is powered by a reduction motor, which drives the worm to rotate, and the worm wheel drives the crank arm to swing through the worm gear transmission. The swing of the crank arm drives the position of the inducer to change, thereby achieving the tensioning and relaxation of the track. The device has a large adjustment amount, can realize the switching between automatic adjustment and manual adjustment, has high reliability, and the rotation angle of the crank arm is not limited. Any rotation angle can be set according to demand, which can increase the track adjustment amount.

Description

Technical Field

[0001] The present invention belongs to the technical field of crawler vehicles, and particularly relates to an automatically adjustable crawler tensioning device. Background Art

[0002] At present, the crawler adjustment devices used in crawler vehicles generally adopt two methods: mechanical adjustment and hydraulic adjustment. Among them, the mechanical adjustment method needs to be adjusted manually and has no automatic adjustment function; the adjustment amount of the hydraulic adjustment method is generally small and the reliability is poor. Summary of the Invention

[0003] (1) Technical Problems to be Solved

[0004] The present invention provides an automatically adjustable crawler tensioning device to solve the technical problems of realizing automatic adjustment, as well as improving the adjustment amount and reliability.

[0005] (2) Technical Solutions

[0006] To solve the above technical problems, the present invention provides an automatically adjustable crawler tensioning device, which includes a speed reduction integrated motor, a cross shaft universal coupling, a worm, a worm gear, a pin shaft, a first copper sleeve, a second copper sleeve, a third copper sleeve, a fourth copper sleeve, a front baffle, a rear baffle, a first adjusting pad, a second adjusting pad, a circlip, an adjuster bracket, a crank arm and a connecting support; among them,

[0007] The speed reduction integrated motor is connected to the worm through the cross shaft universal coupling; the cross shaft universal coupling is connected to the worm through a pin shaft;

[0008] Left and right baffles are respectively installed at the left and right ends of the adjuster bracket to form a cavity; the meshing worm gear and worm are installed in the cavity. The left end of the worm is supported and fixed in the worm installation hole on the left baffle through the second copper sleeve, and the right end of the worm is supported and fixed in the worm installation hole at the right end of the adjuster bracket through the first copper sleeve; the axial position of the worm is adjusted by the first adjusting pad arranged inside the second copper sleeve;

[0009] The connecting support is installed at the rear end of the adjuster bracket by screws and is fixedly connected to the vehicle body through bolts; the crank arm shaft of the crank arm extends into the adjuster bracket from the installation hole on the connecting support and is respectively supported and fixed at the front end of the adjuster bracket and on the connecting support through the third copper sleeve and the fourth copper sleeve; the crank arm shaft is connected to the worm gear by splines, and the second adjusting pad and the circlip are respectively arranged on both sides of the worm gear on the crank arm shaft. The position of the worm gear on the crank arm shaft is adjusted by the second adjusting pad to ensure the cooperation between the worm gear and the worm; the position of the worm gear is fixed by the circlip.

[0010] Furthermore, a brake is integrated in the speed reduction integrated motor. After the crawler belt is tensioned to the set state, the motor stops running and the brake locks.

[0011] Furthermore, the front end of the worm is provided with a standard hexagonal head structure.

[0012] Furthermore, the transmission ratio between the worm gear and the worm adopts a transmission ratio that can achieve self-locking.

[0013] Furthermore, the size of the first copper bushing is larger than that of the second copper bushing.

[0014] Furthermore, the size of the fourth copper bushing is larger than that of the third copper bushing.

[0015] Furthermore, oil grooves are designed on the first copper bushing, the second copper bushing, the third copper bushing and the fourth copper bushing.

[0016] (III) Beneficial effects

[0017] The present invention provides an automatically adjustable crawler belt tensioning device, which includes a speed reduction integrated motor, a cross shaft type universal coupling, a worm, a pin shaft, a first copper bushing, a worm gear, a first adjusting pad, a second copper bushing, a front baffle, a rear baffle, a second adjusting pad, a snap ring, a third copper bushing, a fourth copper bushing, an adjuster bracket, a crank arm and a connecting support. The device is powered by the speed reduction integrated motor to drive the worm to rotate. Through the worm gear and worm transmission, the worm gear drives the crank arm to swing, and the position of the idler wheel is changed by the swing of the crank arm, so as to realize the tensioning and relaxation of the crawler belt. The adjustment amount of the device is large, the switching between automatic adjustment and manual adjustment can be realized, the reliability is high, the rotation angle of the crank arm is not limited, and any rotation angle can be set according to requirements, which can improve the crawler belt adjustment amount. Description of the drawings

[0018] Figure 1 It is the front view cross-sectional view of the automatically adjustable crawler belt tensioning device according to the embodiment of the present invention;

[0019] Figure 2 It is the schematic diagram of the use of the automatically adjustable crawler belt tensioning device according to the embodiment of the present invention. Specific embodiments

[0020] To make the purpose, content and advantages of the present invention clearer, the following combines the drawings and embodiments to further describe the specific embodiments of the present invention in detail.

[0021] This embodiment provides an automatically adjustable crawler belt tensioning device, and its structure is as Figure 1 and 2As shown in the figure, it mainly includes a speed reduction integrated motor 1, a cross shaft universal coupling 2, a worm 3, a pin shaft 4, a first copper bushing 5, a worm gear 6, a first adjusting pad 7, a second copper bushing 8, a front baffle 9, a rear baffle 10, a second adjusting pad 11, a snap ring 12, a third copper bushing 13, a fourth copper bushing 14, an adjuster bracket 15, a crank arm 17 and a connecting support 18.

[0022] A brake is integrated in the speed reduction integrated motor 1. After the crawler is tensioned to the appropriate state, the motor stops running and the brake locks. The speed reduction integrated motor 1 and the worm 3 are connected through the cross shaft universal coupling 2 for transition to ensure that the output shaft of the speed reduction integrated motor 1 is concentric with the axis of the worm 3 and achieve smooth power transmission. The cross shaft universal coupling 2 and the worm 3 are connected through the pin shaft 4, which can achieve the quick connection and disconnection between the speed reduction integrated motor 1 and the worm 3. In case of emergencies such as vehicle electrical system failures or motor failures, the connection between the worm 3 and the speed reduction integrated motor 1 can be disconnected, and manual adjustment can be carried out through the standard hexagonal head structure at the front end of the worm 3 to ensure that the vehicle can still drive normally in case of emergencies.

[0023] The left baffle 9 and the right baffle 10 are respectively installed at the left and right ends of the adjuster bracket 15 to enclose a cavity. The mutually meshing worm gear 6 and the worm 3 are installed in the cavity, and the transmission ratio of the worm gear 6 and the worm 3 adopts a transmission ratio that can achieve self-locking. Among them, the left end of the worm 3 is supported and fixed in the worm installation hole on the left baffle 9 through the second copper bushing 8, and the right end of the worm 3 is supported and fixed in the worm installation hole at the right end of the adjuster bracket 15 through the first copper bushing 5 to ensure smooth rotation of the worm 3. The axial position of the worm 3 can be adjusted through the first adjusting pad 7 arranged inside the second copper bushing 8, and the size of the first copper bushing 5 is larger than that of the second copper bushing 8.

[0024] The connecting support 18 is installed at the rear end of the adjuster bracket 15 through screws and is fixedly connected to the vehicle body through bolts. The crank arm shaft of the crank arm 17 extends into the adjuster bracket 15 from the installation hole on the connecting support 18 and is respectively supported and fixed at the front end of the adjuster bracket 15 and the connecting support 18 through the third copper bushing 13 and the fourth copper bushing 14 to prevent the crank arm 17 from wearing. Among them, the size of the fourth copper bushing 14 is larger than that of the third copper bushing 13. The crank arm shaft is connected to the worm gear 6 by splines, and the second adjusting pad 11 and the snap ring 12 are respectively arranged on both sides of the worm gear 6 on the crank arm shaft. The position of the worm gear 6 on the crank arm shaft is adjusted through the second adjusting pad 11 to ensure the cooperation between the worm gear 6 and the worm 3, and the position of the worm gear 6 is fixed through the snap ring 12.

[0025] The first copper bushing 5, the second copper bushing 8, the third copper bushing 13 and the fourth copper bushing 14 are all designed with oil grooves. Oil is injected through the oil injection holes, which can ensure the lubrication between the copper bushings and the worm 3 and the crank arm 17.

[0026] When using the automatically adjustable crawler tensioning device of the present invention, power is provided by the speed reduction integrated motor 1 to drive the worm 3 to rotate. Through the worm and worm gear transmission, the worm wheel 6 drives the swing arm 17 to swing. The swing of the swing arm 17 drives the idler wheel 16 to change its position, thereby realizing the tensioning and relaxation of the crawler. The automatically adjustable crawler adjustment device of the present invention can realize the automatic tensioning and relaxation of the crawler. The adjustment amount of this device is large, and it can realize the switching between automatic adjustment and manual adjustment. It has high reliability. The rotation angle of the swing arm is not limited and can be set to any rotation angle according to requirements, which can increase the crawler adjustment amount.

[0027] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and deformations can still be made, and these improvements and deformations should also be regarded as the protection scope of the present invention.

Claims

1. An automatically adjustable track tensioning device, characterized in that: The track tensioning device includes a reduction motor, a cross-axis universal coupling, a worm, a worm wheel, a pin, a first copper sleeve, a second copper sleeve, a third copper sleeve, a fourth copper sleeve, a front baffle, a rear baffle, a first adjustment pad, a second adjustment pad, a retaining spring, an adjuster bracket, a crank arm and a connecting support; wherein, The reduction motor and the worm are transitionally connected through a cross-axis universal coupling; the cross-axis universal coupling and the worm are connected through a pin shaft; a brake is integrated in the reduction motor, and after the track is tensioned to a set state, the motor stops running and the brake is locked; The left and right ends of the adjuster bracket are respectively installed with a left baffle and a right baffle to form a cavity; the mutually meshing worm wheel and worm are installed in the cavity, and the transmission ratio of the worm wheel and the worm adopts a transmission ratio that can achieve self-locking. The left end of the worm is supported and fixed in the worm mounting hole on the left baffle through the second copper sleeve, and the right end of the worm is supported and fixed in the worm mounting hole at the right end of the adjuster bracket through the first copper sleeve; the axial position of the worm is adjusted by the first adjustment pad arranged on the inner side of the second copper sleeve; The connecting support is installed on the rear end of the adjuster bracket by screws, and is fixedly connected to the vehicle body by bolts; the crankshaft of the crank arm extends into the adjuster bracket through the mounting hole on the connecting support, and is fixed to the front end of the adjuster bracket and the connecting support by the third copper sleeve and the fourth copper sleeve respectively; the crankshaft is connected to the worm gear by splines, and the crankshaft is provided with a second adjustment pad and a retaining spring respectively located on both sides of the worm gear. The position of the worm gear on the crankshaft is adjusted by the second adjustment pad to ensure the coordination between the worm gear and the worm; the position of the worm gear is fixed by the retaining spring.

2. The track tensioner according to claim 1, characterized in that: The front end of the worm is arranged as a standard hexagonal head structure.

3. The track tensioner according to claim 1, characterized in that: The first copper sleeve is larger than the second copper sleeve.

4. The track tensioner according to claim 1, characterized in that: The size of the fourth copper sleeve is larger than that of the third copper sleeve.

5. The track tensioner according to claim 1, characterized in that: The first copper sleeve, the second copper sleeve, the third copper sleeve and the fourth copper sleeve are all designed with oil grooves.

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