Oblique bevel gear torque dividing device and hinged type dumper

Abstract

The utility model relates to the technical field of oblique bevel gear torque dividing, and particularly discloses an oblique bevel gear torque dividing device which comprises a box body, one end of the box body is rotationally provided with a front input shaft, the front input shaft is connected with a front output shaft and a rear output shaft through a differential transmission mechanism, and the differential transmission mechanism is connected with an oblique bevel gear. The oblique bevel gear is meshed with a front output shaft oblique bevel gear; the front output shaft oblique bevel gear is arranged on the front output shaft; and the rear output shaft and the front input shaft are coaxially arranged. By arranging an oblique bevel gear and a front output shaft oblique bevel gear, a certain included angle is formed between the rotating axis of the front output shaft and the rotating axis of the input shaft, the shaft distance between the two shafts in the vertical direction is shortened, the ground clearance of the oblique bevel gear torque dividing device is large, and the reliability of the oblique bevel gear torque dividing device is effectively improved; the utility model further discloses a hinged dumper comprising the oblique bevel gear torque dividing device.

Description

Technical Field

[0001] The utility model relates to the technical field of helical bevel gear torque separation, and specifically discloses a helical bevel gear torque separation device and an articulated dump truck. Background Art

[0002] Articulated dump trucks are mainly used for transportation operations in mines, water conservancy, ports, and docks. Their working environment is extremely harsh and they often run on soft, pothole-ridden, and muddy ground. This puts higher requirements on the passability of articulated dump trucks. The application of transfer cases can realize the two-way output of power to the front and rear axles at the same time, realize all-wheel drive, and effectively improve the power, escape ability, and passability of the whole machine. This requires that the transfer case must have the ability to split the torque between the front and rear to meet the driving force distribution needs of the whole machine.

[0003] The patent with announcement number CN108407612A discloses a coaxial transfer drive mechanism for an articulated dump truck, which belongs to the technical field of articulated dump trucks. The coaxial arrangement of the input and rear output solves the problem of too small ground clearance between the articulated body and the rear frame, and avoids the bottom of the frame dragging on the ground when the articulated dump truck is driving on potholes and muddy ground.

[0004] The above scheme has at least the following technical problems: the front output shaft and the rear output shaft are arranged in parallel, and the gears are meshed with each other using helical gears, which will increase the wheelbase of the front output shaft and the rear output shaft. At the same time, the output shaft flange at the bottom of the transfer case will extend forward, causing the drive shaft from the transfer case to the front axle to become shorter. The up and down bouncing of the front axle has a great influence on the angle of the drive shaft, and the risk of drive shaft wear is high. If the wheelbase from the front axle to the hinge point is increased, that is, the length of the drive shaft is increased, the size of the vehicle will be larger, the turning radius will also increase accordingly, and the vehicle's passability and maneuverability will be reduced. Moreover, the transfer case is single-stage, with only one gear, no high and low gear, a small speed range, and poor adaptability to road conditions. Utility Model Content

[0005] In view of the above-mentioned deficiencies in the prior art, the utility model provides a bevel gear torque dividing device and an articulated dump truck to solve the problem that the parallel arrangement of the front output shaft and the rear output shaft causes the gears to mesh with each other using bevel gears, which will increase the wheelbase of the front output shaft and the rear output shaft, resulting in a small ground clearance of the transfer case. At the same time, the output shaft flange at the bottom of the transfer case will extend forward, causing the drive shaft from the transfer case to the front axle to become shorter, and the up and down bounce of the front axle has a great influence on the angle of the drive shaft, resulting in a high risk of drive shaft wear. If the wheelbase from the front axle to the hinge point is increased, that is, the length of the drive shaft is increased, the size of the entire vehicle will be larger, the turning radius will also increase accordingly, and the passability and maneuverability of the entire vehicle will be reduced.

[0006] To achieve the above purpose, the technical solution of the utility model is:

[0007] A helical bevel gear torque-distributing device comprises a housing, one end of which is rotatably provided with a front input shaft, the front input shaft is connected to a front output shaft and a rear output shaft through a differential transmission mechanism, the differential transmission mechanism is connected to a helical bevel gear; the helical bevel gear is meshed with a front output shaft helical bevel gear; the front output shaft helical bevel gear is arranged on the front output shaft; the rear output shaft is arranged coaxially with the front input shaft. The arrangement of the helical bevel gear and the front output shaft helical bevel gear makes the rotation axis of the front output shaft form a certain angle with the rotation axis of the front input shaft, shortens the wheelbase of the two shafts in the vertical direction, and the helical bevel gear torque-distributing device has a large ground clearance, which effectively improves its own reliability; at the same time, the flange of the front output shaft is located further back and up on the whole vehicle, which reduces the risk of wear of the transmission shaft and improves the reliability of the transmission shaft; the rear output shaft can be arranged higher than the front output shaft, the rear frame has a large ground clearance, effectively avoids the frame chassis from dragging on the ground, and improves the passing performance of the whole vehicle and the reliability of chassis components.

[0008] Preferably, the differential transmission mechanism includes a differential assembly and a differential lock unit; the differential assembly includes a cross-shaft end face gear; the cross-shaft end face gear is connected to the front input shaft through a bracket; the cross-shaft end face gear is meshed with the rear output end face gear and the front output end face gear; the front output end face gear is connected to the bevel gear; the rear output end face gear is connected to the rear output shaft; and the differential lock unit is arranged at the rear end of the bracket.

[0009] Preferably, the differential lock unit comprises a dog-type clutch and a drive assembly 1; the drive assembly 1 drives the dog-type clutch to operate through the shifter claw, so as to achieve equal rotational speeds of the front output shaft and the rear output shaft, thereby completing differential locking.

[0010] Preferably, the driving component 1 is a pneumatic cylinder or an oil cylinder.

[0011] Preferably, a high-low gear planetary gear set is arranged between the end of the front input shaft and the differential transmission mechanism; the high-low gear planetary gear set includes a planetary gear ring; the planetary gear ring is connected to the front input shaft; the planetary gear ring is connected to the planet carrier through the planetary gear; the planetary gear is connected to the sun gear; the sun gear is connected to the shift unit. Through the arrangement of the high-low gear planetary gear set, the bevel gear torque dividing device can realize high-low and neutral gear shifting, has a large speed range, and better adaptability to road conditions.

[0012] Preferably, the shift unit comprises a second drive assembly; the second drive assembly is connected to a shift fork.

[0013] Preferably, the second driving component is a pneumatic cylinder or an oil cylinder.

[0014] Preferably, the front input shaft, the front output shaft and the rear output shaft are all rotatably connected to the housing via bearings.

[0015] An articulated dump truck includes the above-mentioned bevel gear torque splitting device, which can realize the function of splitting the input power into two and converting it into front and rear outputs, the rear output shaft is located higher than the front output shaft, and the front and rear outputs have differential functions, as well as low gear, high gear and neutral gear functions.

[0016] The beneficial effects of the utility model are:

[0017] 1. The setting of the bevel gear and the bevel gear of the front output shaft makes the rotation axis of the front output shaft and the rotation axis of the front input shaft form a certain angle, shortening the wheelbase of the two shafts in the vertical direction. The bevel gear torque dividing device has a large ground clearance, which effectively improves its own reliability; at the same time, the flange of the front output shaft is located further back and up in the vehicle, reducing the risk of drive shaft wear and improving the reliability of the drive shaft; the rear output shaft can be set higher than the front output shaft, the rear frame has a large ground clearance, effectively avoiding the frame chassis from dragging on the ground, and improving the vehicle's passing performance and the reliability of chassis components.

[0018] 2. Through the setting of high and low gear planetary gear sets, the bevel gear torque splitter can achieve high, low and neutral speed shifting, with a large speed range and better adaptability to road conditions.

[0019] 3. The articulated dump truck including the bevel gear torque splitting device can realize the function of splitting the input power into two and converting it into front and rear outputs. The rear output shaft is located higher than the front output shaft. At the same time, the front output and the rear output have a differential function, as well as low gear, high gear and neutral gear functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 It is a structural schematic diagram of the utility model.

[0022] Description of reference numerals:

[0023] 1-Front input shaft; 2-Case; 3-Shift unit; 4-High and low gear planetary gear sets; 5-Differential transmission mechanism; 6-Differential lock unit; 7-Front output shaft; 8-Rear output shaft; 3.1-Shift fork; 3.2-Drive component one; 4.1-Planet carrier; 4.2-Planet gear; 4.3-Planet gear ring; 4.4-Sun gear; 5.1-Cross shaft end face gear; 5.2-Rear output end face gear; 5.3-Front output end face gear; 5.4-Bracket; 6.1-Claw clutch; 6.2-Drive component two; 7.1-Bevel gear; 7.2-Front output bevel gear. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0025] Example 1

[0026] like Figure 1 As shown, a bevel gear torque distribution device includes a housing 2, a front input shaft 1 is rotatably arranged at one end of the housing 2, the front input shaft 1 is connected to the front output shaft 7 and the rear output shaft 8 through a differential transmission mechanism 5, the differential transmission mechanism 5 is connected to a bevel gear 7.1; the bevel gear 7.1 is meshed with a front output shaft bevel gear 7.2; the front output shaft bevel gear 7.2 is arranged on the front output shaft 7; the rear output shaft 8 is coaxially arranged with the front input shaft 1. The setting of the bevel gear 7.1 and the bevel gear 7.2 of the front output shaft makes the rotation axis of the front output shaft 7 form a certain angle with the rotation axis of the front input shaft 1, shortening the wheelbase of the two shafts in the vertical direction, and the bevel gear torque dividing device has a large ground clearance, which effectively improves its own reliability; at the same time, the flange of the front output shaft 7 is located further back and up in the vehicle, reducing the risk of wear of the transmission shaft and improving the reliability of the transmission shaft; the rear output shaft 8 can be set higher than the front output shaft 7, the rear frame has a large ground clearance, effectively avoiding the frame chassis from dragging on the ground, and improving the vehicle's passing performance and the reliability of chassis components. The front input shaft 1, the front output shaft 7 and the rear output shaft 8 are all rotatably connected to the box body 2 through bearings.

[0027] In the above arrangement, the differential transmission mechanism 5 includes a differential assembly and a differential lock unit 6; the differential assembly includes a cross-shaft end face gear 5.1; the cross-shaft end face gear 5.1 is connected to the front input shaft 1 through a bracket 5.4; the cross-shaft end face gear 5.1 is meshed with a rear output end face gear 5.2 and a front output end face gear 5.3; the front output end face gear 5.3 is connected to a bevel gear 7.1; the rear output end face gear 5.2 is connected to the rear output shaft 8; the differential lock unit 6 is arranged at the rear end of the bracket 5.4. The differential lock unit 6 includes a dog clutch 6.1 and a drive assembly 1 6.2; the drive assembly 1 6.2 drives the dog clutch 6.1 to operate through a shifter, so that the rotation speeds of the front output shaft 7 and the rear output shaft 8 are equal, and the differential lock is completed. The drive assembly 1 6.2 is a cylinder or an oil cylinder.

[0028] In the non-differential state: the cross shaft face gear 5.1 only revolves, but does not rotate, and the revolution speed is the same as the rotation speed of the planet carrier 4.1. At this time, the rotation speeds of the front output face gear 5.3 and the rear output face gear 5.2 are the same as the rotation speed of the planet carrier 4.1.

[0029] Differential state: At this time, the revolution speed of the cross shaft end face tooth 5.1 is less than the speed of the planetary carrier 4.1, and the small gear of the cross shaft end face tooth 5.1 rotates on its own. At this time, the rotation speeds of the front output end face tooth 5.3 and the rear output end face tooth 5.2 are different, thereby realizing the differential function. When any bridge of the front bridge slips, the differential lock unit 6 can be mounted to put it in a non-differential state, thereby improving the vehicle's ability to escape from difficulties.

[0030] In order to achieve high, low and neutral gear shifting, increase the gear shifting range and better adapt to road conditions, a high and low gear planetary gear set 4 is arranged between the end of the front input shaft 1 and the differential transmission mechanism 5; the high and low gear planetary gear set 4 includes a planetary gear ring 4.3; the planetary gear ring 4.3 is connected to the front input shaft 1; the planetary gear ring 4.3 is connected to the planet carrier 4.1 through the planetary gear 4.2; the planetary gear 4.2 is connected to the sun gear 4.4; the sun gear 4.4 is connected to the shift unit 3. The shift unit 3 includes a drive component 2 3.2; the drive component 2 3.2 is connected to the shift fork 3.1; the drive component 2 3.2 can drive the shift fork 3.1 to move, so that the sun gear 4.4 is fixedly connected to the housing 2. The drive component 2 3.2 is a cylinder or an oil cylinder.

[0031] Low gear: under the action of driving component 2 3.2, the shift unit 3 pushes the shift fork 3.1 to move left, so that the sun gear 4.4 is fixedly connected to the housing 2 through the spline engagement sleeve, and the sun gear 4.4 is fixed and does not rotate. At this time, the power is transmitted from the front input shaft 1 to the planetary ring gear 4.3, and the planetary ring gear 4.3 is transmitted to the planetary gear 4.2 and the planetary carrier 4.1, and then transmitted to the differential transmission mechanism 5, realizing the transmission speed reduction and torque increase function.

[0032] High gear: under the action of driving component 2 3.2, the shift unit 3 pushes the shift fork 3.1 to move right, so that the sun gear 4.4 and the planetary carrier 4.1 are fixedly connected through the spline meshing sleeve. At this time, the power is transmitted from the front input shaft 1 to the planetary ring gear 4.3, and the planetary ring gear 4.3 is transmitted to the planetary gear 4.2 and the planetary carrier 4.1, and then transmitted to the differential transmission mechanism 5, realizing the transmission speed increase function.

[0033] Neutral position: shift unit 3 is connected to sun gear 4.4;

[0034] The power is transmitted from the gearbox to the front input shaft 1 through the drive shaft, and the high and low gear planetary gear set 4 is used to switch between high and low gears and neutral gear. The front output shaft 7 and the rear output shaft 8 are driven by the differential transmission mechanism 5 to rotate at different speeds or at the same speed.

[0035] Example 2

[0036] An articulated dump truck includes the bevel gear torque splitting device of the above embodiment 1. The device can realize the function of splitting the input power into two and converting it into front and rear outputs, the rear output shaft 8 is located higher than the front output shaft 7, and the front output and rear output have a differential function, as well as low gear, high gear and neutral gear functions.

[0037] Although the utility model is described in detail by referring to the accompanying drawings and in combination with the preferred embodiments, the utility model is not limited thereto. Without departing from the spirit and essence of the utility model, a person of ordinary skill in the art may make various equivalent modifications or substitutions to the embodiments of the utility model, and these modifications or substitutions shall be within the scope of the utility model / any person of ordinary skill in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the utility model, and they shall be within the scope of protection of the utility model. Therefore, the scope of protection of the utility model shall be based on the scope of protection of the claims.

Claims

1. A bevel gear torque distribution device, comprising a housing (2), one end of which is rotatably provided with a front input shaft (1), the front input shaft (1) being connected to a front output shaft (7) and a rear output shaft (8) via a differential transmission mechanism (5), characterized in that: The differential transmission mechanism (5) is connected to a bevel gear (7.1); the bevel gear (7.1) is meshed with a front output shaft bevel gear (7.2); the front output shaft bevel gear (7.2) is arranged on the front output shaft (7); and the rear output shaft (8) is coaxially arranged with the front input shaft (1).

2. The helical bevel gear torque separation device according to claim 1, characterized in that: The differential transmission mechanism (5) comprises a differential assembly and a differential lock unit (6); the differential assembly comprises a cross-shaft end face gear (5.1); the cross-shaft end face gear (5.1) is connected to the front input shaft (1) via a bracket (5.4); the cross-shaft end face gear (5.1) is meshed with a rear output end face gear (5.2) and a front output end face gear (5.3); the front output end face gear (5.3) is connected to a bevel gear (7.1); the rear output end face gear (5.2) is connected to a rear output shaft (8); and the differential lock unit (6) is arranged at the rear end of the bracket (5.4).

3. The helical bevel gear torque separation device according to claim 2, characterized in that: The differential lock unit (6) comprises a claw clutch (6.1) and a drive assembly (6.2); the drive assembly (6.2) drives the claw clutch (6.1) to operate via a shifting claw, thereby achieving equal rotational speeds of the front output shaft (7) and the rear output shaft (8), thereby completing differential locking.

4. The helical bevel gear torque separation device according to claim 3, characterized in that: The driving component 1 (6.2) is a pneumatic cylinder or an oil cylinder.

5. The helical bevel gear torque separation device according to claim 3, characterized in that: A high-low gear planetary gear set (4) is arranged between the end of the front input shaft (1) and the differential transmission mechanism (5); the high-low gear planetary gear set (4) comprises a planetary gear ring (4.3); the planetary gear ring (4.3) is connected to the front input shaft (1); the planetary gear ring (4.3) is connected to the planet carrier (4.1) via the planetary gear (4.2); the planetary gear (4.2) is connected to the sun gear (4.4); and the sun gear (4.4) is connected to the shift unit (3).

6. The helical bevel gear torque separation device according to claim 5, characterized in that: The gear shift unit (3) comprises a second drive assembly (3.2); the second drive assembly (3.2) is connected to a shift fork (3.1).

7. The helical bevel gear torque separation device according to claim 6, characterized in that: Driving component 2 (3.2) is a pneumatic cylinder or an oil cylinder.

8. The helical bevel gear torque separation device according to claim 1, characterized in that: The front input shaft (1), the front output shaft (7) and the rear output shaft (8) are all rotatably connected to the housing (2) via bearings.

9. An articulated dump truck, characterized in that: It comprises the bevel gear torque separation device as described in any one of claims 1 to 8.

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