Triggered idler, track walking mechanism and engineering machinery

Abstract

The application discloses a trigger type idler, a track walking mechanism and engineering machinery, wherein the trigger type idler comprises an idler body; a convex platform, a main track located on both sides of the convex platform and a secondary track located on the outer side of the main track are arranged on the circumferential surface of the idler body; the convex platform, the main track and the secondary track are annular and gradually decrease in outer diameter, and the secondary track is provided with a runway opening communicated with the main track. The application has good derailing prevention effect, can effectively protect the rubber track, and has simple correction operation, short maintenance period, saved manpower and low cost for the derailing rubber track.

Description

Technical Field

[0001] This invention belongs to the field of engineering machinery technology, specifically relating to a trigger-type idler wheel, a tracked walking mechanism, and engineering machinery. Background Technology

[0002] During normal operation, the idler wheel's main track engages with the tread of the rubber track teeth, with the central boss positioned within the track's groove for restraint. When the machine operates on a slope in mountainous terrain, lateral deformation of the rubber track causes one side of the track teeth to climb onto the side of the idler wheel's boss, while the other side detaches from the idler wheel's main track and derails. During derailment, the other side of the idler wheel no longer engages with the track teeth but instead engages with the rubber portion of the track. Due to the excavator's heavy weight and the significant impact of slope travel, the idler wheel exerts a tremendous compressive load on the track's rubber, easily causing tears and damage to the rubber on both sides of the track teeth. Since the torn or damaged areas are in contact with the ground, water can easily penetrate the track teeth and track joint, further impacting the track's lifespan. After a derailment, the rubber track becomes tight. The only solution is to open the tension check valve, remove the grease to loosen the track, and then have multiple people use pry bars to adjust the rubber track and idler wheel to a normal fit. This process is time-consuming and difficult to repair. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a trigger-type idler wheel, track walking mechanism and engineering machinery, which has a good anti-derailment effect, can effectively protect the rubber track, and the rubber track correction operation after derailment is simple, the maintenance cycle is short, saves manpower and has low cost.

[0004] This invention provides the following technical solution:

[0005] Firstly, a trigger-type idler wheel is provided, including an idler wheel body;

[0006] The circumferential surface of the idler wheel body is provided with a boss, a main rail located on both sides of the boss, and a secondary rail located outside the main rail.

[0007] The boss, main track, and sub-track are all annular with gradually decreasing outer diameters, and the sub-track is provided with a runway opening that communicates with the main track.

[0008] Furthermore, the secondary track has a notch as a runway opening, the cross-section of which is the runway surface, and the runway surface is an inclined plane extending from the connection surface of the main track and the secondary track to the outer side of the secondary track.

[0009] Furthermore, a first main track and a second main track are respectively provided on both sides of the boss. The boss is connected to the first main track through the first boss inclined surface, and the boss is connected to the second main track through the second boss inclined surface.

[0010] Furthermore, a first secondary track is provided on the outside of the first main track, and the first main track and the first secondary track are connected by a first vertical surface; a second secondary track is provided on the outside of the second main track, and the second main track and the second secondary track are connected by a second vertical surface.

[0011] Furthermore, the height difference between the main track and the auxiliary track is less than the height of the track teeth that cooperate with the idler wheel.

[0012] Furthermore, the idler wheel body has a shaft hole in the middle.

[0013] In a second aspect, a tracked traveling mechanism is provided, including the trigger idler wheel described in the first aspect.

[0014] Furthermore, it also includes a track that is installed in conjunction with the idler wheel. The track has a mating groove and track teeth located on both sides of the mating groove. The boss is assembled in the mating groove, and the main track matches and abuts against the track teeth.

[0015] Furthermore, it also includes a frame and track rollers, with both the idler wheel and the track roller mounted on the frame; the track also has a track roller mating surface that matches the track roller.

[0016] Thirdly, an engineering machine is provided, including the trigger-type idler wheel described in the first aspect, or the tracked walking mechanism described in the second aspect.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] (1) In this invention, the circumferential surface of the idler wheel body is provided with a boss, a main track located on both sides of the boss, and a secondary track located outside the main track. The boss, the main track and the secondary track are all annular and the outer diameter gradually decreases. When the rubber track derails, the track teeth move to the secondary track, thereby protecting the rubber track and preventing the rubber track from tearing and breaking due to huge compression. At the same time, since the secondary track is stepped with the main track and is farther away from the boss, it effectively prevents the rubber track from derailing further.

[0019] (2) In this invention, the secondary track is provided with a runway opening that communicates with the main track. When the rubber track derails and the track teeth move to the secondary track, you only need to continue to rotate the rubber track to the runway opening position and rotate the whole machine in the opposite direction of the derailment to achieve the purpose of the track teeth engaging with the main track again. The operation is simple, the maintenance cycle is short, the working time is low, the manpower is saved, and the cost is low. In addition, due to the existence of the runway opening, the rubber track can be first fitted to the secondary track and then rotated to the main track during assembly, which is simple and easy to implement and greatly improves the installation efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the idler wheel in an embodiment of the present invention;

[0021] Figure 2 This is a schematic cross-sectional view of the idler wheel in an embodiment of the present invention;

[0022] Figure 3 This is a diagram showing the normal fit between the idler wheel and the track in an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of the track after deformation and the idler wheel in an embodiment of the present invention;

[0024] Figure 5 This is a schematic cross-sectional view of the track in an embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the tracked walking mechanism in an embodiment of the present invention;

[0026] The markings in the diagram are as follows: 1. Idler wheel body; 2. Boss; 2-1. First boss inclined surface; 2-2. Second boss inclined surface; 3. Main track; 3-1. First main track; 3-2. Second main track; 4. Sub-track; 4-1. First sub-track; 4-2. Second sub-track; 5. Runway surface; 6. Shaft hole; 7. Runway opening; 8. Mating groove; 9. Track teeth; 9-1. First track teeth; 9-2. Second track teeth; 10. Track roller mating surface; 11. Track; 12. Idler wheel; 13. Track roller; 14. Frame; 15. Main track and sub-track connection surface. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0028] It should be noted that in the description of this invention, the terms "front", "rear", "left", "right", "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and do not require that this invention must be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0029] In the description of this invention, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0030] Example 1

[0031] like Figure 1 and Figure 2 As shown, this embodiment provides a trigger-type idler wheel, including an idler wheel body 1. The idler wheel body 1 has a rotating shaft hole 6 for installation in the middle. The circumferential surface of the idler wheel body 1 is provided with a boss 2, a main rail 3 located on both sides of the boss 2, and a secondary rail 4 located outside the main rail 3. The boss 2, the main rail 3 and the secondary rail 4 are all annular and their outer diameters gradually decrease. The secondary rail 4 is provided with a raceway opening 7 that communicates with the main rail 3.

[0032] In this embodiment, the secondary track 4 is provided with a notch called runway opening 7. The cross-section of the notch is runway surface 5. Runway surface 5 is an inclined plane extending from the connection surface 15 of the main track and the secondary track (i.e. the first vertical surface and the second vertical surface mentioned later) to the outer side of the secondary track 4. The existence of runway surface 5 helps to reduce the resistance of the rubber track moving from the secondary track 4 to the main track 3, thereby reducing maintenance time.

[0033] In this embodiment, a first main track 3-1 and a second main track 3-2 are respectively provided on both sides of the boss 2. The boss 2 is connected to the first main track 3-1 through a first boss inclined surface 2-1, and the boss 2 is connected to the second main track 3-2 through a second boss inclined surface 2-2. The first boss inclined surface 2-1 and the second boss inclined surface 2-2 are used to provide auxiliary support for the derailed track teeth without damaging them.

[0034] In this embodiment, a first secondary track 4-1 is provided on the outside of the first main track 3-1, and the first main track 3-1 and the first secondary track 4-1 are connected by a first vertical surface; a second secondary track 4-2 is provided on the outside of the second main track 3-2, and the second main track 3-2 and the second secondary track 4-2 are connected by a second vertical surface.

[0035] In this embodiment, the height difference between the main track 3 and the secondary track 4 is less than the height of the track teeth that cooperate with the idler wheel, which helps to prevent the track teeth from derailing further.

[0036] The working principle of the trigger-type idler wheel in this embodiment is as follows:

[0037] like Figure 3 As shown, when the idler wheel 12 and the rubber track 11 are in normal engagement, the boss 2 of the idler wheel 12 is located in the mating groove 8 of the track, and the track teeth 9 abut against the main track 3. Figure 4As shown, when the machine is operating on a slope in mountainous terrain, when one side of the track teeth 9 climbs onto the ramp (first ramp 2-1 or second ramp 2-2), the other side of the track teeth 9 disengages from the main track 3 of the idler wheel and moves to the secondary track 4. Due to the height difference between the secondary track 4 and the main track 3, the tension load and impact will generate a loud noise, alerting the user that the track teeth 9 have disengaged from the main track 3. Simultaneously, because the secondary track 4 is farther from the ramp 2 and has a height difference from the main track 3 (smaller than the height of the track teeth 9), it prevents further derailment of the track teeth 9. At this point, the track teeth 9 and the secondary track 4 work together, effectively protecting the rubber parts on both sides of the track teeth 9. Furthermore, simply continuing to rotate the rubber track 11 to the runway entrance 7 and rotating the entire machine in the opposite direction of the derailment will allow the track teeth 9 to re-engage with the main track 3. This method is simple to operate, has a short maintenance cycle, low labor time, saves manpower, and is cost-effective. In addition, due to the presence of the runway opening 7, the rubber track 11 can be first fitted to the secondary track 4 and then rotated to the main track 3 during assembly, which is simple and easy and greatly improves the installation efficiency.

[0038] Example 2

[0039] like Figure 3 , Figure 5 and Figure 6 As shown, this embodiment provides a tracked walking mechanism, including the trigger-type idler wheel 12 described in Embodiment 1, and a track 11 that is installed in conjunction with the idler wheel 12. The track 11 has a mating groove 8 and track teeth 9 located on both sides of the mating groove 8. A boss 2 is assembled in the mating groove 8, and the main track 3 matches and abuts against the track teeth 9. Specifically, a first track tooth 9-1 and a second track tooth 9-2 are respectively provided on both sides of the mating groove 8. The first track tooth 9-1 mates with the first main track 3-1, and the second track tooth 9-2 mates with the second main track 3-2.

[0040] The tracked walking mechanism provided in this embodiment also includes a frame 14 and a track roller 13. The idler wheel 12 and the track roller 13 are both mounted on the frame 14. The track 11 is also provided with a track roller mating surface 10 that matches the track roller 13.

[0041] Example 3

[0042] This embodiment provides an engineering machine, which is equipped with the trigger-type idler wheel described in Embodiment 1, or the tracked walking mechanism described in Embodiment 2.

[0043] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A trigger-type idler wheel, characterized in that, Including the idler wheel body; The circumferential surface of the idler wheel body is provided with a boss, a main rail located on both sides of the boss, and a secondary rail located outside the main rail. The boss, main track, and sub-track are all annular with gradually decreasing outer diameters, and the sub-track is provided with a runway opening that communicates with the main track. The secondary track has a notch that serves as a runway opening. The cross-section of the notch is the runway surface, which is an inclined plane extending from the connection surface between the main track and the secondary track to the outer side of the secondary track.

2. The trigger-type idler wheel according to claim 1, characterized in that, The boss is provided with a first main track and a second main track on both sides. The boss is connected to the first main track through the inclined surface of the first boss, and the boss is connected to the second main track through the inclined surface of the second boss.

3. The trigger-type idler wheel according to claim 2, characterized in that, A first secondary track is provided on the outer side of the first main track, and the first main track and the first secondary track are connected by a first vertical surface; a second secondary track is provided on the outer side of the second main track, and the second main track and the second secondary track are connected by a second vertical surface.

4. The trigger-type idler wheel according to claim 1, characterized in that, The height difference between the main track and the auxiliary track is less than the height of the track teeth that cooperate with the idler wheel.

5. The trigger-type idler wheel according to claim 1, characterized in that, The idler wheel body has a shaft hole in the middle.

6. A tracked walking mechanism, characterized in that, Including the trigger-type idler wheel as described in any one of claims 1 to 5.

7. The tracked walking mechanism according to claim 6, characterized in that, It also includes a track that is installed in conjunction with the idler wheel. The track has a mating groove and track teeth located on both sides of the mating groove. The boss is assembled in the mating groove, and the main track matches and abuts against the track teeth.

8. The tracked walking mechanism according to claim 6, characterized in that, It also includes a frame and track rollers, with both the idler wheel and the track roller mounted on the frame; the track also has a track roller mating surface that matches the track roller.

9. An engineering machinery, characterized in that, It includes the trigger idler wheel as described in any one of claims 1 to 5, or the tracked walking mechanism as described in any one of claims 6 to 8.

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