KR100381339B1 - Arrangement for preventing mast assembly hinge bearing from moving in forklift truck - Google Patents

Abstract

The present invention relates to a bearing movement preventing structure for the hinge of the mast assembly of the forklift.

The present invention is installed between the pair of support brackets (10) installed on both ends of the drive shaft (9), and each pair of support brackets (10) and the hinge shaft (30) having a lubricant injection passage (32) therein. And a bearing means 40 rotatably installed on the hinge shaft 30 and a mast assembly supported by an outer ring of the bearing means 40 to be rotatably assembled on the hinge shaft 30. ) To maintain a constant position on the hinge shaft 30, the bearing means to ensure that the lubricating oil injection passage 32 in the hinge shaft 30 and the oil supply groove 46 of the bearing 40 is always in communication It is characterized in that the spacer 50 is provided between the support bracket 10 on one side of the 40 and the support brackets 10 on both sides. The present invention prevents the left and right movement of the bearing by using a spacer, so that the lubricating oil flowing from the inlet can be smoothly supplied to the contact surface between the inner ring and the outer ring through the passage of the hinge shaft and the oiling groove and the oil hole of the bearing inner ring. Has the effect. In particular, the lubricant is smoothly supplied to the bearing, thereby improving the performance and durability of the bearing.

Description

Arrangement for preventing mast assembly hinge bearing from moving in forklift truck}

The present invention relates to a mast assembly of a forklift, and more particularly, to a bearing movement preventing structure for a hinge of a mast assembly of a forklift, which is disposed at a hinge portion of a mast assembly and facilitates rotation of the mast assembly.

Forklift trucks are used to lift and lower relatively heavy loads or to transport them to a desired location in a limited space. 1, the forklift is provided with a front driving wheel 3 and a vehicle body 1 supported by a rear steering wheel (not shown), and a mast assembly 5 is installed in front of the vehicle body 1. . The mast assembly 5 has a carriage 7 which can be moved up and down along the master assembly 5, which has a pair of forks 8 that support the load of the load. Is installed.

On the other hand, the mast assembly 5 is configured to be inclined forward or rearward by the tilt cylinder (5a), for this purpose, the mast assembly (5) is rotatably installed on the drive shaft (9) of the vehicle body (1). Looking at this in detail, as shown in Figures 1 and 2, the support brackets 10 are mounted on both sides of the drive shaft 9 for supporting the front drive wheel (3). The support brackets 10 are configured to form a pair, and the pair of support brackets 10 are arranged to face each other at a predetermined interval, as shown in FIG. Equipped. On the other hand, the mast assembly 5 is provided with hinge brackets 20 extending rearward as shown in FIG. The hinge bracket 20 is configured to be disposed between the pair of support brackets 10 facing each other, as shown in FIG. 3, and the hinge holes 22 aligned with the support holes 12 of the support bracket 10. Equipped with.

With this configuration, the hinge bracket 20 is disposed between the support brackets 10 of the drive shaft 9, and the support holes 12 and the hinge holes of the hinge brackets 20 are aligned with each other. The master assembly 5 is rotatably installed on the drive shaft 9 by fitting the hinge shaft 30 to the shaft 22 and fixing the bolt shaft B with the hinge shaft 30. Meanwhile, as illustrated in FIG. 3, a gap T is formed between both sides of the hinge bracket 20 and the support bracket 10. The gap T prevents direct contact between the support bracket 10 and the hinge bracket 20 by spaced apart from the support bracket 10 and the hinge bracket 20.

In addition, a bearing 40 is interposed between the hinge bracket 20 and the hinge shaft 30 so as to smoothly rotate the master assembly 5. The bearing 40 is comprised from the outer ring 42 and the inner ring 44 arrange | positioned so that spherical treatment may be carried out on the inner peripheral surface of this outer ring 42. In particular, oiling grooves 46 are formed on the inner circumferential surface of the inner ring 44, and oiling holes 48 communicating with the oiling grooves 46 are formed on the outer surface of the inner ring 44. The lubrication groove 46 is arranged to communicate with the lubricating oil injection passage 32 formed in the hinge shaft 30 so as to distribute lubricating oil periodically supplied through the lubricating oil inlet 34, and the lubricating hole 48 is a lubricating groove ( 46 serves to directly supply the lubricating oil circulated along the contact surface of the inner ring 44 and the outer ring 42 forming the spherical treatment.

On the other hand, the lubricating oil periodically supplied through the lubricating oil inlet 34 passes through the injection passage 32 of the hinge shaft 30 communicating with each other, the oiling groove 46 of the inner ring 44, and the oiling hole 48. The contact surface between the 42 and the inner ring 44 is reached, and the bearing 40 can be operated smoothly by this lubricant.

However, such a conventional forklift does not smoothly supply lubricating oil to the mast assembly hinge bearing, so that the outer ring 42 and the inner ring 44 of the bearing 40 are easily worn. There was a problem falling.

That is, the conventional forklift has a predetermined gap T between the support bracket 10 and the hinge bracket 20 to minimize the contact friction between the support bracket 10 and the hinge bracket 20, and the mast The assembly 5 is slightly moved to the left and right due to the gap T, and the bearing 40 is disposed between the hinge bracket 20 and the hinge shaft 30 as the mast assembly 5 is shaken. The injection grooves 46 of the bearing 40 and the injection passage 32 of the hinge shaft 30 that are slightly moved left and right are shifted from each other. The lubricating groove 46 and the injection passage 32 which are displaced from each other are the injection passage 32 of the hinge shaft 30, the lubricating oil moving passage leading to the lubrication groove 46 of the inner ring 44 and the lubrication hole 48. It prevents the lubricating oil injected through the injection hole 34 to reach the contact surface of the inner ring 44 and the outer ring 42. As a result, the lubricating oil supply to the contact surface between the inner ring 44 and the outer ring 42 is not smooth, so that the contact friction coefficient between the inner ring 44 and the outer ring 42 of the bearing 40 becomes high, and the increased coefficient of friction increases the inner ring 44. And to accelerate the wear of the outer ring 42 will result in a reduction in the performance and life of the bearing (40).

Therefore, the present invention has been made to solve the above problems, the object of the forklift for preventing the movement of the bearing so that the passage of the bearing groove and the hinge shaft of the bearing is always aligned, the forklift to smoothly supply the lubricant to the bearing To provide a bearing movement prevention structure for the hinge of the mast assembly.

1 is a side view of a typical forklift truck,

2 is a front view of a typical forklift truck,

3 is a cross-sectional view showing in detail the mast assembly hinge of the conventional forklift;

Figure 4 is a cross-sectional view showing a bearing movement preventing structure for the mast assembly hinge of the forklift according to the present invention,

5 is a cross-sectional view showing another embodiment of the bearing movement preventing structure for the mast assembly hinge of the forklift according to the present invention.

♣ Explanation of symbols for the main parts of the drawing ♣

5: mast assembly 9: drive shaft

10: support bracket 20: hinge bracket

30: hinge axis 32: injection passage

34: inlet 40: bearing

42: outer ring 44: inner ring

46: oiling groove 48: oiling hole

50: spacer

In order to achieve the above object, the present invention provides a pair of support brackets installed at both ends of the drive shaft, a hinge shaft connected between the pair of support brackets, and having a lubricating oil injection passage therein, and rotating on the hinge shaft. In the bearing means and the mast assembly, which is supported by the outer ring of the bearing means and rotatably assembled on the hinge shaft, the bearing means maintains a fixed position on the hinge shaft, and the lubricating oil inside the hinge shaft. In order to ensure that the injection passage and the lubrication groove of the bearing is always in communication, a spacer is provided between the bearing means and the support bracket on one side of the support brackets on both sides.

Preferably, a spacer is further provided between the bearing means and the support brackets on the other side of the support brackets on both sides.

Hereinafter, with reference to the accompanying drawings a preferred embodiment of the bearing movement preventing structure for the mast assembly hinge of the forklift according to the present invention will be described in detail as follows (the same components will be described using the same reference numerals).

Figure 4 is a cross-sectional view showing a bearing movement preventing structure for the mast assembly hinge of the forklift according to the present invention, Figure 5 is a cross-sectional view showing another embodiment of the bearing movement preventing structure for the mast assembly hinge of the forklift according to the present invention.

First, before explaining the bearing movement preventing structure for the mast assembly hinge of the present invention will be briefly described the configuration of the hinge portion of the mast assembly. 4 and 5, only the hinge part of either hinge part of the mast assembly is shown. According to this, the hinge brackets 20 of the mast assembly 5 are disposed between the support brackets 10 mounted to one side of the drive shaft 9, and the support holes 12 of the support brackets 10 aligned with each other. And a hinge shaft 30 is fitted into the hinge hole 22 of the hinge bracket 20. Hinge shaft 30 is firmly fixed to the support bracket 10 by the bolt (B).

In addition, a bearing 40 for smoothly rotating the master assembly 5 is disposed between the hinge shaft 30 and the hinge bracket 20, and the bearing 40 has an outer ring 42 and an outer ring 42. The inner circumferential surface of the inner ring 44 is disposed to form a spherical treatment. In particular, oiling grooves 46 are formed around the inner surface of the inner ring 44, and oiling holes 48 communicating with the oiling grooves 46 are formed on the outer surface of the inner ring 44. The lubrication groove 46 is arranged to communicate with the lubricating oil injection passage 32 formed in the hinge shaft 30 to distribute the lubricating oil injected through the injection hole 34 of the hinge shaft 30, and the lubricating hole 48 is filled with oil. It serves to directly supply the lubricating oil circulated along the groove 46 to the contact surface of the inner ring 44 and the outer ring 42.

On the other hand, the bearing movement preventing structure for the mast assembly hinge of the present invention is provided with a spacer 50 for preventing the movement of the bearing (40). Referring to this in detail with reference to Figure 4, the spacer 50 is interposed between the hinge axis 30 and the hinge bracket 20. The spacer 50 is disposed on one side of the bearing 40 to maintain a constant distance between the inner wall of the support bracket 10 and the bearing 40 at all times. By preventing the lubrication groove 46 of the inner ring 44 and the injection passage 32 of the hinge shaft 30 is aligned with each other. Here, a minimum clearance t should be provided between the spacer 50 and the support bracket 10 to avoid direct contact between the spacer 50 and the support bracket 10, and this clearance gap t is hinged. It should be configured to be smaller than the diameter of the injection passage 32 formed in the shaft (30). This is to ensure that the fuel injection groove 46 of the inner ring 44 and the injection passage 32 of the hinge shaft 30 always communicate with each other even if the bearing 40 is moved by the clearance gap t.

On the other hand, the spacer 50 is to be supported on either the outer ring 42 or the inner ring 44 of the bearing 40, it is preferable to be supported by the outer ring 42 of the bearing 40 as possible. This is to support the outer ring 42 of the bearing 40 rotates together with the hinge bracket 20, so as to more effectively control the left and right movement of the bearing (40). In addition, the spacer 50 may be made of an oilless metal containing oil so that the friction coefficient may be minimized during the friction contact with the support bracket 10.

Therefore, the bearing 40 is prevented from moving left and right by the spacer 50 having such a configuration. As a result, even if the hinge bracket 20 of the mast assembly 5 moves left and right, the inner ring 44 is moved. The oil supply groove 46 of the) and the injection passage 32 of the hinge shaft 30 are always aligned so as to guide the lubricating oil introduced through the injection hole 34 to the contact surface between the inner ring 44 and the outer ring 42. It is.

Next, another embodiment of the present invention is shown in FIG. According to this, the bearing movement preventing structure of another embodiment has a structure in which the spacer 50 for preventing the movement of the bearing 40 is disposed on both the left and right sides of the bearing 40, as described above. Here, the spacer 50 should be configured to protrude from both sides of the hinge bracket 20, which avoids direct friction between the hinge bracket 20 and the support bracket 10, and supports the spacer 50 which is an oilless metal. To contact the bracket (10). On the other hand, between the spacer 50 and the support bracket 10 should be formed of the minimum clearance gap (t), of course, the spacer 50 is configured to be supported on the outer ring 42 of the bearing 40 Of course.

As described above, the present invention prevents the left and right movements of the bearing 40 through the spacer 50, thereby opening the injection passage 32 of the oil feed groove 46 and the hinge shaft 30 of the inner ring 44. It is always aligned so that the lubricating oil flowing through the injection hole 34 can be smoothly reached to the contact surface of the inner ring 44 and the outer ring 42.

The above embodiments are merely illustrative of the preferred embodiments of the present invention, and the scope of application of the present invention is not limited to the above, and the present invention can be appropriately changed within the scope of the same idea. For example, the shape and structure of each component specifically shown in the embodiment of the present invention can be modified.

As described above, the bearing movement preventing structure for the mast assembly hinge of the forklift according to the present invention prevents left and right movement of the bearing by using a spacer, so that the lubricating oil flowing from the injection port is injected into the hinge shaft and the oil supply groove of the bearing inner ring. And it has an effect that can be smoothly supplied to the contact surface of the inner ring and the outer ring through the oil hole. In particular, the lubricant is smoothly supplied to the bearing, thereby improving the performance and durability of the bearing.

Claims (3)

A pair of support brackets 10 installed at both ends of the drive shaft 9, a hinge shaft 30 connected between the pair of support brackets 10, and having a lubricating oil injection passage 32 therein; In the mast assembly is rotatably mounted on the hinge shaft 30 and supported by the outer ring of the bearing means 40 rotatably assembled on the hinge shaft 30, The bearing means 40 maintains a constant position on the hinge shaft 30, and the lubricating oil injection passage 32 in the hinge shaft 30 and the oil supply groove 46 of the bearing 40 are always in communication. Mast assembly for the forklift, characterized in that the spacer 50 is provided between the bearing means 40 and the support bracket 10 on one side of the support bracket 10 on both sides to maintain the state. Bearing movement prevention structure. 2. The mast assembly hinge of claim 1, further comprising a spacer 50 between the bearing means 40 and the support brackets 10 on the other side of the support brackets 10 on both sides. Bearing movement prevention structure. According to claim 1, wherein the bearing means 40 is composed of an inner ring 44 and the outer ring 42, the inner ring 44 is a circumference in communication with the lubricating oil injection passage 32 of the hinge shaft (30) Bearing oil movement preventing structure for the hinge of the mast assembly of the forklift, characterized in that the oil filling groove 46 in the direction is formed and a plurality of oil filling holes 48 communicating with the outer ring 42 are formed.