A drive assembly and tracked vehicle

Abstract

The application discloses a driving assembly and a tracked vehicle, and relates to the technical field of transportation equipment. The driving assembly comprises a driving motor and a driving sprocket. The driving motor is provided with a first connecting part in the middle of the axial direction for being connected with a mounting frame. The fixed end of the driving sprocket is fixedly connected with the output end of the driving motor. The free end of the driving sprocket extends to the middle of the driving motor. The outer wall of the free end of the driving sprocket is provided with annularly arranged sprocket teeth. The sprocket teeth are used for being connected with a track transmission. By adopting the setting mode, the sprocket teeth under stress are located close to the first connecting part. The force arm when the reaction force acts on the motor output shaft is shortened. The bending moment force borne by the motor output shaft is reduced. The problem that the motor output shaft and the bearing supporting the output shaft are prone to wear and failure is avoided. The service life of the motor is prolonged. Meanwhile, the stability during the working process of the driving assembly is improved. Vibration and noise are not prone to being generated. The comfort of the whole machine operation is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transportation equipment, in particular to a driving assembly and a tracked vehicle. BACKGROUND

[0002] The tracked vehicle (such as a tracked tunneling machine, a tracked transport vehicle, engineering machinery, etc.) is widely used in many fields due to its small ground pressure, good traction adhesion, strong off-road passing ability and other advantages. At present, the known driving scheme of the tracked vehicle is that a planetary reducer is installed on a tracked frame, a hydraulic motor drives an input shaft of the planetary reducer, thereby driving a rotating shell of the planetary reducer, a sprocket is installed on the rotating shell, and the sprocket drives the running of a track. When the hydraulic motor is braked, the braking torque is transmitted to the sprocket through the planetary reducer, so as to realize the braking of the tracked equipment.

[0003] However, in actual application, especially in the working conditions of heavy load, frequent large torque starting, braking, forward and reverse rotation and other impact loads, the traditional structure has significant inherent defects: as the transmission link of the motor driving torque and the braking torque, all gears and shafts of the planetary reducer directly bear the reaction force impact transmitted by the track, so the failure rate is high. In addition, if the planetary reducer shaft breaks, the braking force of the motor end cannot be transmitted to the track, which leads to the loss of control of the vehicle.

[0004] If the shaft end of the low-speed large-torque motor directly drives the sprocket, and the planetary reducer is removed, the advantage is that the braking torque of the brake can be directly transmitted to the traction sprocket through the main shaft of the low-speed large-torque motor, which can improve the braking safety. The disadvantage is that the radial force, axial force and torque of the sprocket need to be reasonably transmitted to the low-speed large-torque motor through a suitable structure. Since a long force arm is formed between the sprocket and the fixed mounting point (such as the flange or base) of the motor itself, the ground resistance will generate a large bending moment on the motor output shaft, which will cause the motor to be subjected to a large overturning moment. The overturning moment will force the bearing radial load of the motor output shaft to overload, which will easily cause abnormal wear, heating and even early failure of the bearing, seriously shorten the service life of the motor, and the entire drive assembly is prone to vibration and noise under the action of the moment, which affects the transmission stability and the operation comfort of the whole machine.

[0005] Therefore, there is an urgent need for a driving assembly and a tracked vehicle capable of reducing the overturning moment of the motor to improve the driving reliability and braking safety of the tracked equipment. SUMMARY

[0006] The purpose of the present application is to provide a driving assembly and a tracked vehicle. The sprocket teeth are installed at one end of the driving sprocket close to the middle of the motor, so that the reaction force on the sprocket teeth is concentrated in the middle of the motor, the force arm is shortened, and the overturning moment on the motor is reduced.

[0007] To achieve the above object, the present application provides the following scheme:

[0008] The present application provides a driving assembly, comprising:

[0009] A driving motor, an axial middle part of the driving motor is provided with a first connecting part for connecting with a mounting frame;

[0010] A driving sprocket, a fixed end of the driving sprocket is fixedly connected with an output end of the driving motor, a free end of the driving sprocket extends to the middle part of the driving motor, an outer wall of the free end of the driving sprocket is provided with sprocket teeth arranged in a ring shape, and the sprocket teeth are used for driving connection with a track.

[0011] As an embodiment, the driving sprocket is in a cylindrical shape, the fixed end of the driving sprocket is provided with a second connecting part, the second connecting part extends to the center of the driving sprocket along the radial direction of the driving sprocket, the output end of the driving motor is provided with a mounting flange, the driving sprocket is sleeved outside the driving motor, and the second connecting part is detachably connected with the mounting flange.

[0012] As an embodiment, the driving motor is internally provided with support bearings for supporting a driving shaft, two support bearings are arranged between the first connecting part and the output end of the driving motor along the axial direction of the driving motor, and the sprocket teeth are located between the two support bearings along the axial direction of the driving motor.

[0013] The present application also provides a track vehicle, comprising:

[0014] A machine body;

[0015] A mounting frame, the mounting frame is mounted on the machine body, and walking wheels are mounted on the lower side of the mounting frame;

[0016] The above driving assembly, the first connecting part is connected with the mounting frame;

[0017] A track, the track is sleeved outside the mounting frame, driving teeth on the inner side of the track are meshingly connected with the sprocket teeth, and the walking wheels are rollingly matched with the inner side of the track;

[0018] And a hoisting mechanism, the hoisting mechanism is mounted on the machine body.

[0019] As an embodiment, a telescopic mechanism is further included, an output shaft of the telescopic mechanism is arranged along the length direction of the track, and the driving motor is mounted on the output end of the telescopic mechanism.

[0020] As an embodiment, a brake is further included, which is installed at one end of the driving motor away from the driving sprocket in the axial direction, and an output end of the brake is used to be connected with an output shaft of the driving motor.

[0021] As an embodiment, a track frame is further included, which is connected with the telescopic shaft of the telescopic mechanism, and an installation cavity is formed in the track frame, the driving motor is installed in the installation cavity, and an axis of the installation cavity is arranged along the width direction of the track.

[0022] As an embodiment, a vertical distance between the axis of the installation cavity and the lower surface of the track wheel is greater than the sum of the sprocket tooth and the radius of the driving sprocket.

[0023] As an embodiment, along the width direction of the track, the track frame is arranged at one side of the end of the installation frame close to the center of the track vehicle, and the size of the track frame is smaller than the size of the installation frame.

[0024] As an embodiment, the driving motor is bolted with the track frame.

[0025] The present application has the following technical effects relative to the prior art:

[0026] In the driving assembly and the track vehicle disclosed by the present application, the driving motor is connected with the installation frame through the first connecting part arranged in the middle part in the axial direction, the free end of the driving sprocket connected with the output end of the motor extends to the middle part of the motor, the sprocket tooth is arranged on the outer side wall of the free end of the driving sprocket, and the sprocket tooth is used as the power output point and directly bears the reaction force of the track. By adopting the above arrangement, the sprocket tooth under stress is arranged at the position close to the first connecting part, the force arm when the reaction force acts on the output shaft of the driving motor is shortened, the bending moment force borne by the output shaft of the motor is reduced, the problems that the output shaft of the motor and the bearing supporting the output shaft are easily worn and failed are avoided, the service life of the motor is prolonged, the stability during the working process of the driving assembly is improved, the vibration and noise are not easily generated, and the comfort of the whole machine operation is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0028] Figure 1 FIG. 1 is a schematic view of the driving assembly in the embodiment of the present application;

[0029] Figure 2A schematic view of a track vehicle in another embodiment of the present application;

[0030] Figure 3 A schematic view of a track vehicle in another embodiment of the present application;

[0031] Figure 4 A schematic view of a driving motor in an embodiment of the present application;

[0032] wherein 1, driving motor; 2, mounting frame; 3, driving sprocket; 4, sprocket tooth; 5, track; 6, first connecting part; 7, second connecting part; 8, mounting flange; 9, supporting bearing; 10, road wheel; 11, hoisting mechanism; 12, track frame; 13, mounting cavity; 14, first connecting hole; 15, second connecting hole; 16, third connecting hole; 17, fourth connecting hole; 18, mounting plate; 19, machine body. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0034] The purpose of the present application is to provide a driving assembly and a track vehicle to solve the problems in the prior art, wherein the sprocket tooth is installed at one end of the driving sprocket close to the middle of the motor, the force arm is shortened, the overturning torque received by the motor is reduced, and the service life of the motor is improved.

[0035] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0036] Please refer to Figures 1-4The driving assembly disclosed in the embodiment of the application comprises a driving motor 1 and a driving sprocket 3, wherein the axial middle part of the driving motor 1 is provided with a first connecting part 6 for connecting with a mounting frame 2, the fixed end of the driving sprocket 3 is fixedly connected with the output end of the driving motor 1, the free end of the driving sprocket 3 extends to the middle part of the driving motor 1, and the outer wall of the free end of the driving sprocket 3 is provided with annularly arranged sprocket teeth 4 for transmission connection with a track 5.

[0037] It can be understood that the middle part mentioned in the "axial middle part of the driving motor 1 is provided with a first connecting part 6 for connecting with a mounting frame 2" refers to any position between the two axial ends of the driving motor 1.

[0038] In the embodiment, the driving sprocket 3 is in a cylindrical shape, the fixed end of the driving sprocket 3 is provided with a second connecting part 7, the second connecting part 7 extends to the center of the driving sprocket 3 along the radial direction of the driving sprocket 3, the output end of the driving motor 1 is provided with a mounting flange 8, the driving sprocket 3 is sleeved outside the driving motor 1, and the second connecting part 7 is detachably connected with the mounting flange 8.

[0039] Further, the mounting flange 8 is provided with annularly arranged first connecting holes 14, and the second connecting part 7 is provided with second connecting holes 15 corresponding to the first connecting holes 14, so that the driving sprocket 3 can be detachably mounted on the mounting flange 8 through the bolt structure by aligning the first connecting holes 14 with the second connecting holes 15, and the detachable mounting mode facilitates the maintenance of the driving assembly in the later period.

[0040] In the embodiment, the driving motor 1 is internally provided with support bearings 9 for supporting the driving shaft, and the two support bearings 9 are arranged at intervals between the first connecting part 6 and the output end of the driving motor 1 along the axial direction of the driving motor 1, so that the output shaft is supported by the two support bearings 9 together, the stress of a single support bearing 9 is reduced, and the abrasion of the support bearings 9 is reduced.

[0041] Further, along the axial direction of the driving motor 1, the sprocket teeth 4 are located between the two supporting bearings 9, and this arrangement ensures uniformity of force on the two supporting bearings 9, so that the wear degree of the two supporting bearings 9 is close, so that the replacement of the two supporting bearings 9 can be carried out simultaneously in the subsequent maintenance process.

[0042] The track vehicle disclosed in the embodiment of the application comprises a machine body 19, a mounting frame 2, the above-mentioned driving assembly, a track 5, and a hoisting mechanism 11; wherein the mounting frame 2 is mounted on the machine body 19, the walking wheels 10 are mounted on the lower side of the mounting frame 2, the first connecting part 6 on the driving motor 1 in the driving assembly is connected with the mounting frame 2, the track 5 is sleeved outside the mounting frame 2, the driving teeth on the inner side of the track 5 are meshed and connected with the sprocket teeth 4, the walking wheels 10 are rolling matched with the inner side of the track 5, and the hoisting mechanism 11 is mounted on the machine body 19; the working principle is that the target object is hoisted by the hoisting mechanism 11, the driving motor 1 works, the power is transmitted to the driving teeth on the inner side of the track 5 through the sprocket teeth 4, and then the track 5 starts to perform the winding movement, and the track 5 performing the winding movement can drive the track vehicle to move, so as to transfer the target object.

[0043] Preferably, the two mounting frames 2 are respectively mounted on the left and right sides of the machine body 19, and the hoisting mechanism 11 is mounted on the front side or the rear side of the machine body 19.

[0044] It can be understood that during the working process of the track vehicle, the walking wheels 10 and the sprocket teeth 4 do not interfere with each other; at the same time, the track vehicle comprises a track wheel and other structures to ensure the normal operation of the track vehicle, which is prior art and will not be described here.

[0045] The track vehicle in the embodiment further comprises a telescopic mechanism, the output shaft of the telescopic mechanism is arranged along the length direction of the track 5, the driving motor 1 is mounted on the output end of the telescopic mechanism, and the driving motor 1 can be extended outward or retracted inward through the telescopic mechanism, so as to adjust the tension degree of the track 5.

[0046] In the embodiment, the telescopic mechanism is a known telescopic structure such as a hydraulic cylinder or a pneumatic cylinder.

[0047] Preferably, the telescopic end of the telescopic mechanism is provided with a mounting plate 18, the driving motor 1 is connected with the mounting plate 18, and the telescopic cylinder drives the driving motor 1 to move through the mounting plate 18.

[0048] In the embodiment, the tracked vehicle further comprises a brake, which is mounted at the end of the driving motor 1 away from the driving sprocket 3 along the axial direction of the driving motor 1, and the output end of the brake is used to be connected with the output shaft of the driving motor 1. When the brake works, the output end of the brake can be directly connected with the output shaft of the driving motor 1, and the brake provides resistance for the output shaft of the driving motor 1 to realize rapid braking. By using the brake output end directly connected with the output shaft of the driving motor 1, the response speed of the braking process is improved. At the same time, by using the above-mentioned arrangement mode of the driving sprocket 3 connecting the driving motor 1 and the track 5, the distance between the driving motors 1 arranged on the left and right side mounting frames 2 can be increased without affecting the normal work of the structures, that is, the space between the driving motors 1 arranged on the left and right side is increased, which provides guarantee for the installation and maintenance of the brake.

[0049] In the embodiment, the end of the output shaft of the driving motor 1 away from the driving sprocket 3 is a brake end, which extends out of the shell of the driving motor 1 along the axial direction, so that the output end of the brake is connected with the output shaft of the driving motor 1.

[0050] In the embodiment, the brake is a known friction brake.

[0051] In the embodiment, the driving motor 1 is a hydraulic motor, preferably a low-speed internal curve hydraulic motor. By using the low-speed internal curve hydraulic motor, the speed difference between the brake end and the output end of the brake is reduced, and the risk of ablation during braking is reduced.

[0052] In the embodiment, the tracked vehicle further comprises a track frame 12, which is connected with the telescopic shaft of the telescopic mechanism. The track frame 12 is provided with a mounting cavity 13, and the driving motor 1 is detachably mounted in the mounting cavity 13. The axis of the mounting cavity 13 is arranged along the width direction of the track 5. By using this mounting mode, when the motor needs to be maintained, the driving motor 1 can be directly taken out from one side of the tracked vehicle, and the maintenance difficulty is reduced.

[0053] In the embodiment, the cross section of the mounting cavity 13 is circular.

[0054] Preferably, the first connecting part 6 extends away from the axis of the driving motor 1 along the radial direction of the driving motor 1, and the first connecting part 6 is arranged around the outer wall of the driving motor 1.

[0055] In the embodiment, the vertical distance between the axis of the mounting cavity 13 and the lower surface of the traveling wheel 10 is greater than the sum of the radius of the sprocket tooth 4 and the driving sprocket 3, that is, the distance between the lower end of the lowermost driving tooth and the ground is greater than the distance between the lower surface of the traveling wheel 10 and the ground when the track vehicle is on the ground. When the hoisting mechanism 11 of the track vehicle hoists the material, the force on the end of the hoisting mechanism increases, and during the traveling process, the track vehicle is prone to tilt and sway in the front-back direction. In this way, the distance between the sprocket tooth 4 and the ground is increased, which can avoid the problem that the track vehicle tilts in the front-back direction, and the sprocket tooth 4 and the driving sprocket 3 are directly subjected to the force from the ground, resulting in excessive force on the driving sprocket 3 and the sprocket tooth 4 and damage.

[0056] In the embodiment, the track frame 12 is arranged on one side of the end of the mounting frame 2 close to the center of the track vehicle in the width direction of the track 5, and the size of the track frame 12 is smaller than the size of the mounting frame 2. In this way, the mounting position of the driving motor 1 can be moved to the center in the width direction of the track vehicle, and the size of the track vehicle in the width direction can be reduced, thereby reducing the volume of the track vehicle and improving the flexibility of the track vehicle during operation.

[0057] In the embodiment, the driving motor 1 is bolted to the track frame 12.

[0058] Further, a plurality of third connecting holes 16 are arranged on the outside of the mounting cavity 13, the plurality of third connecting holes 16 are arranged in a ring shape, a fourth connecting hole 17 corresponding to the third connecting hole 16 is arranged on the first connecting part 6, and the driving motor 1 and the track frame 12 can be detachably connected through the third connecting hole 16, the fourth connecting hole 17, and the bolt structure.

[0059] It can be understood that the hoisting mechanism 11 is a prior art, and any hoisting device that can hoist the material can be used.

[0060] In the embodiment, the hoisting structure is a telescopic arm, the telescopic arm is rotationally connected to the mounting frame 2, and a hook is arranged on the end of the telescopic arm away from the mounting frame 2.

[0061] The principles and implementation manners of the present application are described by using specific examples in the present application, and the above embodiment is only used to help understand the method and core idea of the present application; meanwhile, for those skilled in the art, the specific implementation manners and application ranges can be changed according to the idea of the present application. In conclusion, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A tracked vehicle, characterized in that, The tracked vehicle comprises: a machine body (19); a mounting frame (2) mounted on the machine body (19), the lower side of the mounting frame (2) being provided with a traveling wheel (10); a drive assembly comprising a drive motor (1), the axial middle part of the drive motor (1) being provided with a first connecting part (6) for connecting with the mounting frame (2); and a drive sprocket (3), the fixed end of the drive sprocket (3) being fixedly connected with the output end of the drive motor (1), the free end of the drive sprocket (3) extending to the middle part of the drive motor (1), the outer wall of the free end of the drive sprocket (3) being provided with a ring-shaped arrangement of sprocket teeth (4), the sprocket teeth (4) being used for driving connection with a track (5); the drive motor (1) is internally provided with a support bearing (9) for supporting a drive shaft, along the axial direction of the drive motor (1), two support bearings (9) are arranged between the first connecting part (6) and the output end of the drive motor (1), along the axial direction of the drive motor (1), the sprocket teeth (4) are located between the two support bearings (9); a track (5) is sleeved on the outside of the mounting frame (2), the driving teeth on the inner side of the track (5) are in meshing connection with the sprocket teeth (4), and the traveling wheel (10) is in rolling fit with the inner side of the track (5). Further comprising a brake, the brake is installed at one end of the drive motor (1) away from the drive sprocket (3) in the axial direction, and the output end of the brake is used for connecting with the output shaft of the drive motor (1).

2. The tracklayer of claim 1, wherein, The drive sprocket (3) is in a cylindrical shape, the fixed end of the drive sprocket (3) is provided with a second connecting part (7), the second connecting part (7) extends to the center of the drive sprocket (3) in the radial direction of the drive sprocket (3), the output end of the drive motor (1) is provided with a mounting flange (8), the drive sprocket (3) is sleeved on the outside of the drive motor (1), and the second connecting part (7) is detachably connected with the mounting flange (8).

3. The track-layer vehicle of claim 1, wherein Further comprising a telescopic mechanism, the output shaft of the telescopic mechanism is arranged along the length direction of the track (5), and the drive motor (1) is installed at the output end of the telescopic mechanism.

4. The tracklayer of claim 3, wherein, Further comprising a track frame (12), the track frame (12) is connected with the telescopic shaft of the telescopic mechanism, the track frame (12) is provided with a mounting cavity (13), the drive motor (1) is detachably installed in the mounting cavity (13), and the axis of the mounting cavity (13) is arranged along the width direction of the track (5).

5. The tracklayer of claim 4, wherein, The vertical distance between the axis of the mounting cavity (13) and the lower surface of the traveling wheel (10) is greater than the sum of the radius of the sprocket teeth (4) and the drive sprocket (3).

6. The tracklayer of claim 4, wherein, Along the width direction of the track (5), the track frame (12) is arranged on one side of the end part of the mounting frame (2) close to the center of the tracked vehicle, and the size of the track frame (12) is smaller than the size of the mounting frame (2).

7. The tracklayer of claim 4 wherein, The driving motor (1) is bolted with the track frame (12).

8. The track-layer vehicle of claim 1, wherein A hoisting mechanism (11) is further included, which is installed on the fuselage (19).

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