JPH10297550A - Bogie type lower wheel for crawler type vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bogie type lower wheel for a crawler type vehicle, with which a bogie unit can be simply removed from a track frame with no risk of internal damage. SOLUTION: A bogie unit which is attached to the lower side of a track frame 1 having first thread holes 11 formed in the lower thereof, and which can rotate around its axis and can revolve on the inner peripheral surface of a crawler belt wound around the track frame 1, includes a first intermediate member 4 having first bolt holes 4, a second intermediate member 5 pivotally attached to at its upper side to the first intermediate member 4 by means of a first pin and at its lower side to lower wheels 6F, 6B by means of second pins, and first bolts 42 fastened in the first thread holes 11 through the first bolt holes 41.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bogie type lower wheel for a crawler type vehicle.

[0002]

2. Description of the Related Art A method of assembling a lower rolling wheel to a crawler type vehicle is roughly classified into a direct mounting type and a bogie type. The direct axle type is a method in which the lower rolling wheel is directly mounted on the lower side of the track frame, and the lower rolling wheel is rotatable around the shaft mounting on the inner peripheral surface of the crawler belt wound around the outer periphery of the track frame. Becomes On the other hand, the bogie type is a system having an intermediate member in which the upper side is pivotally attached to a lower side of a track frame of a crawler type vehicle with a first pin and the lower side is pivotally attached to a lower wheel with a second pin. The wheel can revolve around the first pin on the inner circumferential surface of the crawler belt and can rotate around the second pin. Such bogies allow the crawler belt to contact the bumps and bumps even on uneven road surfaces, as compared with the direct bearing type. For this reason, the bogie type is less likely to slip than the direct bearing type,
It has the advantage that the traction force can be easily drawn out without deteriorating the ground, and that the undercarriage members such as the truck frame, the lower wheel, and the crawler belt can be lightly loaded (that is, lightened).

A specific example of such a bogie type lower wheel will be described with reference to FIG. FIG. 4 shows a bogie type lower wheel of the left track frame of the crawler type vehicle. The bogie type lower wheel of the right track frame is symmetrical with respect to the center line in the front-rear direction of the vehicle, and thus the description thereof is omitted. In the following description, directions such as front and rear, left and right, and inside and outside are referred to as front and rear, left and right, and inside and outside as viewed from the vehicle.

[0004] A left bracket 110L is welded to the left side surface (ie, outside the vehicle) of the left track frame 100, and a right bracket 110R is welded to the right side surface (ie, inside the vehicle). The left and right brackets 110L and 110R each have a hole 111 in the left and right direction. The left bracket 110L further has a first stopper 112 on the outer end surface. The intermediate member 200 includes a left side plate 210L and a right side plate 210R each having a substantially isosceles triangle having an upper portion at the center as an apex, and a tubular member 220 integrally provided between the respective apexes by welding.
The left and right ends of the front lower rolling wheel 300F are pivotally mounted by second pins (not shown) between the front corners of the left and right side plates 210L and 210R, and the left and right ends of the rear lower rolling wheel 300B are positioned between the rear corners. It is axially mounted on a second pin (not shown), whereby the front and rear lower
F and 300B are free to rotate. On the other hand, the cylindrical member 2
A bearing 221 and a seal 222 outside the bearing 221 are fitted into the left and right ends of the bearing 20, respectively. Then, the cylindrical member 220 is inserted between the holes 111, 111, and the first pin 400 having the second stopper 410 and the grease fitting 420 (or the oil fitting 420) on the outer end face is inserted from the outer hole 111 into the seal 222 and the bearing. 221 and 221 and the seal 222 are passed through the inner hole 111 in this order. At this time, the second stopper 410 is connected to the first stopper 11
2, the first pin 400 is made unrotatable. After that, the nut 500 is screwed onto the screw 430 provided at the tip of the first pin 400. Therefore, the front and rear lower rolling wheels 300F, 300
B can revolve around the first pin 400. That is, it becomes a bogie type lower wheel. In addition, lubrication or lubrication to the bearings 221 and 221 is performed from the fitting 420.

[0005]

However, according to the prior art, when the entire bogie type lower wheel (hereinafter simply referred to as "bogie alone") is attached to and detached from the track frame 100, the first pin 400 is inserted into the hole 111. 111, seal 22
2, 222 and bearings 221 and 221. This causes the following problem.

(1) A crawler type vehicle (for example, a bulldozer) usually operates in an atmosphere having a lot of mud, sand and dust. In the crawler type vehicle, there are many occasions in which the bogie alone is detached from the truck frame 100 in such an atmosphere, repaired, and inspected. However, at this time, as described above, the first pin 400 is inserted into the holes 111, 111 and the seal 22.
2, 222 and the bearings 221, 221, the first pin 400 as well as the seal 222 and the bearing 22.
Mud, sand, dust and the like also adhere to 1, causing poor lubrication. The poor lubrication causes a disadvantage that they are damaged.

(2) The gap between the lower surface of the track frame 100 where the bogie type lower wheel is located and the crawler belt is narrow and the visibility is poor. Moreover, the bogie alone is also heavy. That is, the bogie type lower wheel is connected to the track frame 100.
Usually, the workability for attaching and detaching from is poor. Therefore, when the first pin 400 is taken in and out, the tip of the first pin 400 collides with the bearing 221 and the seal 222, and there is a disadvantage that these are damaged.

(3) In order to prevent the above-mentioned inconveniences and to ensure workability, it is necessary to carefully attach and detach the bogie alone. That is, the configuration requires a lot of work.

SUMMARY OF THE INVENTION In view of the above problems of the prior art, an object of the present invention is to provide a bogie type lower rolling wheel of a crawler type vehicle in which a bogie alone can be easily attached to and detached from a track frame without fear of internal damage. .

[0010]

In order to achieve the above object, a first bogie type lower wheel of a crawler type vehicle according to the present invention is provided below a track frame. In a bogie type lower wheel of a crawler type vehicle which is rotatable and revolvable on an inner peripheral surface of a wound crawler belt, (1) a track frame having a first screw hole on a lower side; A first intermediate member having a 1-bolt hole, (3) a second intermediate member axially mounted on the upper side of the first intermediate member with a first pin, and a lower side axially mounted on a lower wheel with a second pin, (4) a first bolt screwed into the first screw hole through the first bolt hole.

[0011] According to the first configuration, the lower rolling wheel is vertically swingable about the first pin on the inner peripheral surface of the crawler belt (that is, revolves freely), and is rotatable about the second pin. Therefore, it becomes a bogie type lower wheel. Therefore, the crawler belt is grounded with good followability to the unevenness even on an uneven road surface. In other words, the crawler belt is hard to slip, pulls out the traction without ruining the soil,
It has advantages such as contributing to weight reduction of underbody members such as lower rolling wheels and crawler belts. Moreover, when attaching and detaching such a bogie type lower wheel from the track frame, it is only necessary to attach and detach the first bolt without attaching and detaching the first pin as in the prior art. Accordingly, mud, sand, dust, and the like do not adhere to the seal and the bearing in the first intermediate member from the first pin, and damage due to poor lubrication can be eliminated. Further, unlike the related art, there is no chance that the tip of the first pin collides with the bearing or the seal, so that the damage of the bearing or the seal can be prevented.
Further, since the bogie type lower wheel can be detached from the track frame simply by attaching and detaching the first bolt, the workability is good and the attaching and detaching operation can be performed in a short time. In other words, the bogie-type lower rolling wheel of the crawler-type vehicle can easily attach and detach the bogie alone from the truck frame without fear of internal damage.

Second, the first configuration is characterized in that the diameter of the first bolt hole is larger than the outer diameter of the first bolt.

According to the second configuration, the bogie-type lower wheel can be easily attached to and detached from the track frame, and the centering can be easily performed, superimposing on the effect of the first structure, thereby improving the working efficiency and the lower rolling wheel. Alignment is also improved.

Third, in the first or second configuration,
The second intermediate member includes: (1) a first auxiliary member axially mounted on the first intermediate member with a first pin; and (2) a second auxiliary member axially mounted on the lower wheel with a second pin. (3) a second bolt hole provided in one of the first sub-member and the second sub-member, and (4) a first sub-member and the second
It is characterized in that it has a second screw hole provided on the other side of the sub-member, and (5) a second bolt screwed into the second screw hole through the second bolt hole.

[0015] According to the third configuration, the second sub-member is connected to the first sub-member.
When attaching and detaching from the sub member, it is only necessary to attach and detach the second bolt. Accordingly, the workability is improved by superimposing the effects of the first and second configurations, and the attaching / detaching operation can be performed in a short time.

Fourthly, in the above-mentioned third structure, the hole diameter of the second bolt hole is larger than the outer diameter of the second bolt.

According to the fourth configuration, it is easy to attach and detach the second sub-member from the track frame and to align the second sub-member, thereby improving work efficiency and alignment of the lower wheel. Further, when the hole diameter of the second bolt hole is larger than the outer diameter of the second bolt, the above-described respective effects appear in a superimposed manner.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An example machine on which the embodiment is mounted is a crawler type dump truck as shown in FIG. The track frame 1 of the example machine has a sprocket 1A which is a driving wheel at a front end.
And an idler 1B which is a driven wheel at a rear end, and a direct-attached lower rolling wheel 2, four bogie-type lower rolling wheels 3A to 3D, and a direct-attached lower rolling wheel in this order from the front. And 2. And these sprockets 1A and two lower rolling wheels 2, 2
And four bogie type lower wheels 3A to 3D and an idler 1B
The crawler belt 1C is wound around the outer circumference of the above.

The crawler belt 1C is a crawler link 1C.
1 and a crawler shoe 1C2 fixed to the outer periphery thereof. That is, the sprocket 1A is the crawler link 1
The rotational force is transmitted to the crawler belt 1C by meshing with C1. On the other hand, lower rolling wheels 2 and 2 and bogie type lower rolling wheel 3A
3D and the idler 1B have their respective outer peripheral surfaces abutting on the inner peripheral surface of the crawler link 1C1, and are each allowed to rotate freely.

Hereinafter, the bogie type lower rollers 3A to 3D are
The bogie type lower wheel 3A will be described with reference to FIGS. Note that the other bogie type lower rolling wheels 3B to 3D have the same structure as the bogie type lower rolling wheel 3A, and thus the description thereof will be omitted.

As shown in FIG. 1, the track frame 1 has first screw holes 11 in the up-down direction at the lower left and right and front and back, respectively.
Having. On the other hand, the bogie type lower rolling wheel 3A is the first intermediate member 4
Left and right first sub-members 5A, 5A, and second sub-member 5B
And a wheel preventing plate 7. Details are as follows. still,
The first sub-member 5A and the second sub-member 5B are simply referred to as “second intermediate member 5”.

The first intermediate member 4 has a first bolt hole 41 in a vertical direction at a position corresponding to the first screw hole 11.
Therefore, the first bolts 42 are screwed into the respective first screw holes 11 through the respective first bolt holes 41 from below to above. Therefore, the first intermediate member 4 is the track frame 1
And is integrally fixed to the lower surface of the. The first intermediate member 4 includes a first sub-member 5A at each of the left and right ends thereof, and a first pin 4A.
With a shaft. The second sub-member 5B is fastened to the left and right first sub-members 5A, 5A with second bolts 53. Details are as follows.

The left and right first sub-members 5A, 5A have second bolt holes 5A1 at the front and rear, respectively, and can be axially attached to the left and right ends of the first intermediate member 4 with the first pins 4A. .

The second auxiliary member 5B includes a front-rear spacing member 51F,
51B and left and right side plates 52L and 52R. The left and right ends of the front spacing member 51F are integrally fixed by welding between the front upper portions of the left and right side plates 52L and 52R.
B is integrally fixed between the rear upper portions of the left and right side plates 52L and 52R by welding. Further, left and right side plates 52L, 52
A front lower rolling wheel 6F is pivotally mounted between the lower front of the R with a second pin 6C,
A rear lower wheel 6B is pivotally mounted between the left and right plates 52L, 52R by a second pin 6C. Below, front and rear lower rolling wheels 6F, 6
When B is collectively referred to, it is simply referred to as “roller wheel 6”.

The lower roller 6 has left and right pivoting members 6L and 6R which are pivotally mounted on the left and right ends by second pins. The left shaft attaching member 6L is screwed to a screw hole 5B2 provided on the lower surface of the left plate 52L by a bolt 61, and the right shaft attaching member 6R is screwed to a screw hole 5 provided on the lower surface of the right plate 52R by a bolt 61.
Screwed to B2. By these screws, the lower rolling wheel 6 is allowed to rotate freely.

The front and rear left and right side plates 52L and 52R have second vertical screw holes 5B1 at positions corresponding to the second bolt holes 5A1. Therefore, the first left and right sub-members 5A and 5A are connected to the left and right ends of the first intermediate member 4 by the first pins 4A.
The left and right first sub-members 5A,
5A are respectively rotated so that the respective second bolt holes 5A1 are in the vertical direction. At this time, the second bolts 53 are passed through the respective second bolt holes 5A1 from above to below and screwed into the respective second screw holes 5B1. I'm wearing it. Therefore, the second sub-member 5B is integrally fixed to the lower surfaces of the left and right first sub-members 5A, 5A. That is, the left and right first sub-members 5A and 5A and the second sub-member 5B
Are integrated as the second intermediate member 5.

As shown in FIG. 1 and FIG. 2 which is a partial detailed view of FIG. 1, the derailing prevention plate 7 is integrally formed with a left prevention plate 71L, a right prevention plate 71R, and a spacing member 72. Is done. The spacing member 72 is integrally provided between the left and right prevention plates 71L and 71R by welding or bolting. Each of the left and right prevention plates 71L and 71R has a bolt hole 73 before and after each. The second sub-member 5B has screw holes 5B3 at respective positions corresponding to the bolt holes 73. So bolt 7
4 is screwed into each screw hole 5B3 from the bottom upward through each bolt hole 73. As a result, the wheel removal prevention plate 7 is integrally fixed to the lower part of the second sub-member 5B. still,
In this fixed state, the distance between the left and right prevention plates 71L and 71R is slightly larger than the width of the crawler link 1C1,
In addition, the lower sides of the left and right prevention plates 71L and 71R are configured to be located below the upper surface of the crawler link 1C1,
With this configuration, the left and right prevention plates 71L and 71R sandwich the crawler link 1C1 from the left and right directions. Therefore, even if the crawler link 1C1 attempts to derail from the lower rolling wheel 6 due to an external force, the side surface of the crawler link 1C1 collides with one of the inner side surfaces of the left and right prevention plates 71L and 71R. To prevent.

According to the above embodiment, the bogie type lower wheel 3A
Each of the lower rolling wheels 6 to 3D swings up and down around the first pin 4A on the inner peripheral surface of the crawler belt, and is capable of revolving.
It becomes freely rotatable around the second pin 6C. Therefore, as described above, the crawler belt 1C is grounded with good followability to the unevenness even on an uneven road surface. That is, the crawler belt 1C is hard to slip, and can pull out the traction force without damaging the soil,
Track frame 1, lower rolling wheel 6, crawler belt 1
It has advantages such as contributing to weight reduction of underbody members such as C.

According to the above embodiment, the following effects are also obtained. (1) The bogie type lower rollers 3A to 3D are mounted on the track frame 1
When attaching / detaching from the first position, it is only necessary to attach / detach the first bolt 42 without attaching / detaching the first pin 4A as in the prior art. Therefore, the first pin 4A does not originally adhere to the seals and bearings in the first intermediate member 4 with mud, sand, dust, and the like, and damage due to poor lubrication can be eliminated. Further, unlike the related art, there is no chance that the tip of the first pin 4A collides with the bearing or the seal, and the damage of the bearing or the seal can be prevented.
In addition, the bogie type lower wheel 3 can be obtained simply by attaching and detaching the first bolt 42.
Since A to 3D can be attached to and detached from the track frame 1, the workability is good and the attaching / detaching operation can be performed in a short time. (2) When attaching and detaching the second sub-member 5B from the first sub-member 5A, it is only necessary to attach and detach the second bolt 53. Therefore, the workability is good and the attaching / detaching operation can be performed in a short time. (3) That is, the bogie type lower rolling wheel of the crawler type vehicle can easily attach and detach the bogie alone from the truck frame without fear of internal damage.

Another embodiment will be described below. (1) In the above embodiment, the second bolt hole 5A1 is provided in the first sub-member 5A, and the second screw hole 5B1 is provided in the second sub-member 5B.

(2) It is preferable that the diameter of the first bolt hole 41 be larger than the outer diameter of the first bolt 42. By doing so, it becomes easy to attach and detach the bogie type lower wheels 3A to 3D from the track frame 1 and to align them with each other.
The work efficiency and the alignment of the lower roller 6 are improved. Similarly, it is preferable that the diameter of the second bolt hole 5A1 be larger than the outer diameter of the second bolt 53. This way,
The second sub-member 5B can be attached to and detached from the track frame 1,
Alignment is facilitated, and work efficiency and alignment of the lower roller 6 are improved. When the hole diameter of the first bolt hole 41 is larger than the outer diameter of the first bolt 42 and the hole diameter of the second bolt hole 5A1 is larger than the outer diameter of the second bolt 53, the respective effects appear in a superimposed manner. .

(3) In the above embodiment, the first intermediate member 4
The first intermediate member 4 is fixedly mounted on the track frame 1 by attaching the first sub-member 5A to the left and right ends of the track frame 1 with the first pins 4A. The front and rear lower rolling wheels 6F and 6B are fixed to a lower portion of the first intermediate member 4.
May be included. In view of this, in the claims, "the member fixed to the track frame 1" is referred to as "first intermediate member" and includes both.

(4) Bogie type lower wheel 3A in the above embodiment
Although 3D has a configuration in which the lower rolling wheel 6 is provided in the front and rear, the above-described effect can be obtained with one or a plurality of lower rolling wheels.
However, when the number of the lower rolling wheels 6 is one, the structure has a return spring between the second intermediate member 5 and the track frame 1. When there are a plurality (for example, three), the first set is composed of two pieces and the second set is composed of one piece.
The configuration is such that the two lower rolling wheels 6 of the set are swingable vertically, and then the first set and the second set are swingable vertically. In this case, the first pin serves as a swing axis of the first set and the second set.

[Brief description of the drawings]

FIG. 1 is an assembly view of an embodiment.

FIG. 2 is an assembly view of a derailment prevention plate.

FIG. 3 is a side view of a crawler type vehicle equipped with the embodiment.

FIG. 4 is an assembly view of a conventional lower wheel mounting structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Track frame 1C Crawler belt 11 1st screw hole 4 1st intermediate member 41 1st bolt hole 42 1st bolt 5 2nd intermediate member 5A 1st sub member 5A1 2nd bolt hole 5B 2nd sub member 5B1 2nd screw hole 53 2nd bolt 6 Lower wheel 6F Front lower wheel 6B Rear lower wheel

Claims (4)

[Claims] 1. A bogie type lower wheel of a crawler type vehicle provided on a lower side of a track frame and rotatable and revolvable on an inner peripheral surface of a crawler belt wound around the track frame. A track frame having a first screw hole on a lower side; (2) a first intermediate member having a first bolt hole; and (3) an upper side is axially mounted on the first intermediate member by a first pin, and a lower side is a lower side. A bogie for a crawler-type vehicle, comprising: a second intermediate member that is pivotally mounted on a wheel by a second pin; and (4) a first bolt that is screwed into a first screw hole through a first bolt hole. Type down wheel. 2. The bogie type lower wheel for a crawler type vehicle according to claim 1, wherein the diameter of the first bolt hole is larger than the outer diameter of the first bolt. Wheel. 3. The bogie type lower wheel for a crawler type vehicle according to claim 1, wherein the second intermediate member comprises: (1) a first sub-member which is pivotally mounted on the first intermediate member by a first pin. (2) a second sub-member, the lower side of which is axially mounted on the lower wheel with a second pin; (3) a second bolt hole provided in one of the first sub-member and the second sub-member; ) A second sub-member provided on the other of the first sub-member and the second sub-member;
A bogie type lower rolling wheel for a crawler type vehicle, comprising: a screw hole; and (5) a second bolt screwed into the second screw hole through the second bolt hole. 4. The bogie type lower wheel for a crawler type vehicle according to claim 3, wherein the hole diameter of the second bolt hole is larger than the outer diameter of the second bolt. Wheel.