A shaft head connecting a disc harrow blade to a leg

Abstract

The utility model discloses a connecting disc harrow piece and the axle head of support leg, including outer flange, mandrel and bearing, outer flange is located the periphery of mandrel, and mandrel is connected with outer flange through bearing;Characterized in that: bearing is double row tapered roller bearing, and the outside of bearing one end is provided with the circlip of limiting it and the dust cover of avoiding silt to enter, and the outside of bearing other end is provided with the bushing of positioning it and the composite sealing ring of sealing effect, and the outside of composite sealing ring is provided with the check ring of limiting it. The utility model discloses an axle head, and bearing adopts double row tapered roller bearing, and its axial load bearing capacity is bigger, and will not appear the situation of shaking or damaging;Meanwhile, bearing's both sides are provided with circlip, dust cover, have composite sealing ring, bushing and check ring, effectively realize the sealing of internal bearing, can effectively avoid the soil and fine sand to enter the inside of axle head, ensure the service life of axle head.

Description

Technical Field

[0001] This utility model relates to a shaft head, and more specifically, to a shaft head that connects a disc rake blade to a support leg. Background Technology

[0002] The disc harrow is an important agricultural tillage implement. Drawn by a tractor, the disc-shaped blades (plow blades) on the harrow roll and cut into the soil to achieve tillage and pulverization. The disc harrow is adaptable to various soil types, significantly improving tillage efficiency and offering high productivity. It is increasingly used for farmland preparation and soil tillage. The blades and outriggers are crucial components of the disc harrow. The disc-shaped blades are fixed and rotated at the lower end of the outriggers. During use, the blades extend into the soil, tilling it by cutting into the soil. Therefore, ensuring a stable connection between the blades and outriggers is essential for the stable operation of the disc harrow.

[0003] To achieve a stable connection between the rake blade and the support leg, the lower end of the support leg is equipped with a shaft head for fixing the rake blade. The shaft head consists of a spindle, a bearing, and an outer flange. The outer flange is rotatably connected to the spindle via the bearing. The rake blade is fixed on the outer flange, and the spindle is fixed on the support leg, thus achieving a rotatable connection between the rake blade and the support leg.

[0004] Because existing disc harrows typically use ball bearings, such as double-row deep-furrow ball bearings, in their axle heads, their axial load capacity is limited. However, during the cutting and tilling of the soil, the axle head must withstand not only significant radial loads but also substantial axial loads. After a period of use, existing deep-furrow ball bearings, unable to withstand the large axial loads, will begin to wobble or become damaged. This wobble allows soil and fine sand to enter the axle head, further accelerating bearing wear and ultimately leading to axle head failure, severely shortening the disc harrow's service life. Therefore, good sealing of the axle head is also a crucial factor in ensuring its long-term stable operation. Summary of the Invention

[0005] In order to overcome the shortcomings of the above-mentioned technical problems, this utility model provides a shaft head for connecting the disc rake blade and the support leg.

[0006] The shaft head connecting the disc rake blade and the support leg of this utility model includes an outer flange, a mandrel, and a bearing. The outer flange is located around the mandrel, and the bearing is located between the mandrel and the outer flange. The mandrel and the outer flange are connected via the bearing. The bearing is characterized in that: the bearing is a double-row tapered roller bearing, and a retaining ring for limiting its position and a dust cover to prevent mud and sand from entering are provided on the outer side of one end of the bearing. A bushing for positioning and a composite sealing ring for sealing are provided on the outer side of the other end of the bearing. A retaining ring for limiting its position is provided on the outer side of the composite sealing ring.

[0007] The shaft head of the connecting disc rake blade and the support leg of this utility model has bolt holes evenly opened around the outer flange. The outer flange is connected to the disc rake blade by a second connecting bolt inserted into the bolt hole. The support leg is fixedly connected to the spindle by a first connecting bolt passing through the lower end of the support leg and the spindle.

[0008] The shaft head of this utility model connects the disc rake blade and the support leg. The bearing consists of an outer ring, an inner ring, a cage, and tapered rollers. The outer ring is located outside the inner ring, the cage is located between the inner and outer rings, and the tapered rollers are placed on the cage. The tapered rollers are in contact with both the outer and inner rings. An L-shaped metal retaining ring and a rubber sealing ring are provided between the inner and outer rings on the outer side of the tapered rollers for sealing.

[0009] The axle head of the connecting disc rake blade and the support leg of this utility model is composed of a composite sealing ring consisting of a first folded metal frame, a second folded metal frame, a first rubber ring, a second rubber ring, and a metal ring. The first folded metal frame is connected to the second folded metal frame via the first rubber ring and the second rubber ring, and the metal ring is located on the periphery of the second rubber ring.

[0010] The shaft head connecting the disc rake blade and the support leg of this utility model is provided with an O-ring seal on the outer flange of the dust cover.

[0011] The beneficial effects of this utility model are as follows: The shaft head connecting the disc rake blades and the support legs of this utility model is provided with an outer flange, a mandrel, and a bearing. The mandrel is used to connect with the support legs of the disc rake, the outer flange is used to connect with the rake blades of the disc rake, and the bearing adopts a double-row tapered roller bearing. Since the double-row tapered roller bearing can not only withstand a large radial load, but also a large axial load, compared with the existing disc rake shaft head using deep groove ball bearings, its axial load bearing capacity is greater. After the disc rake has been used for a long time, there will be no shaking or damage, effectively extending the service life of the disc rake.

[0012] Meanwhile, a retaining ring and dust cover are provided on one side of the bearing, and a composite sealing ring, bushing and retaining ring are provided on the other side, which effectively seals the internal bearing. During the process of the shaft head going deep into the farmland soil for soil turning, it can effectively prevent soil and fine sand from entering the inside of the shaft head, thus effectively protecting the bearing and ensuring that the service life of the shaft head meets the design requirements. Attached Figure Description

[0013] Figure 1 This is a structural diagram illustrating the application of the shaft head connecting the disc rake blade and the support leg in this utility model. Figure 2 This is a front view of the shaft head connecting the disc rake blade and the support leg of this utility model; Figure 3 This is a right view of the shaft head connecting the disc rake blade and the support leg of this utility model; Figure 4 for Figure 2 A magnified view of a portion of region A in the middle.

[0014] In the diagram: 1. Support leg; 2. Rake blade; 3. Shaft head; 4. First connecting bolt; 5. Second connecting bolt; 6. Outer flange; 7. Mandrel; 8. Bearing; 9. Bushing; 10. Composite seal ring; 11. Retaining ring; 12. Snap ring; 13. Dust cover; 14. O-ring seal; 15. Bolt hole; 16. Outer ring; 17. Inner ring; 18. Cage; 19. Tapered roller; 20. First folded metal frame; 21. Second folded metal frame; 22. First rubber ring; 23. Second rubber ring; 24. Metal ring; 25. L-shaped metal retaining ring; 26. Rubber seal ring. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] like Figure 1 The diagram shows the application structure of the shaft head connecting the disc harrow blade and the support leg of this utility model. The shaft head 3 is used to connect the support leg 1 and the harrow blade 2. The lower end of the support leg 1 is connected to the shaft head 3 via the first connecting bolt 4, and the harrow blade 2 is connected to the shaft head 3 via the second connecting bolt 5. In this way, the harrow blade 2 is rotated and fixed at the lower end of the support leg 1. During the process of the harrow blade 2 following the disc harrow to plow the farmland, the harrow blade 2 cuts into the soil and can rotate to realize the cutting and plowing operation of the farmland soil.

[0017] like Figure 2 and Figure 3 As shown, the front view and right view of the shaft head connecting the disc rake blade and the support leg of this utility model are given respectively. Figure 2 The main view in the diagram uses a partial section, showing that the shaft head 3 consists of an outer flange 6, a spindle 7, and a bearing 8. The outer flange 6 is located around the spindle 7, and the bearing 8 is located between the outer flange 6 and the spindle 7. The spindle 7 is connected to the outer flange 6 via the bearing 8. The bearing 8 shown is a double-row tapered roller bearing. Double-row tapered roller bearings can withstand not only large radial loads but also large bidirectional axial loads. Thus, during the process of the harrow blades 2 cutting into the soil and tilling it, the bearing 8 can withstand the radial and axial forces from the harrow blades 2, preventing the shaft head from shaking or being damaged during long-term use of the disc harrow.

[0018] A retaining ring 12 and a dust cover 13 are provided on the outer side of one end of the bearing 8 shown. The retaining ring 12 limits the bearing 8, and the dust cover 13 seals one end of the bearing 8 to prevent dirt and fine sand from entering the space where the bearing 8 is located. A bushing 9 and a composite sealing ring 10 are provided on the outer side of the other end of the bearing 8. The bushing 9 positions the bearing 8, and the composite sealing ring 10 seals the other end of the bearing 8 to prevent dirt and fine sand from entering the space where the bearing 8 is located. A retaining ring 11 is provided on the outer side of the composite sealing ring 10, which further seals the end of the shaft head 3 and increases the sealing effect on the inner bearing 8.

[0019] An O-ring 14 is provided on the side of the outer flange 6 surrounding the dust cover 13. The O-ring 14 is located in the annular sealing groove, and it further enhances the sealing effect on the inner bearing 8. It can be seen that the composite sealing ring 10, retaining ring 11, dust cover 13, and O-ring 14 together achieve a seal for the space where the bearing 8 is located, effectively preventing mud and water from entering the bearing 8 and damaging it in harsh farming environments.

[0020] like Figure 4 As shown, it gives Figure 2 The enlarged view of area A shows a double-row tapered roller bearing consisting of an outer ring 16, an inner ring 17, a cage 18, and tapered rollers 19. The outer ring 16 is located around the inner ring 17, and the cage 18 is located between the inner ring 17 and the outer ring 16. The tapered rollers 19 are secured to the cage 18 and abut against both the inner ring 17 and the outer ring 16. Because the tapered rollers 19 abut against both the inner ring 17 and the outer ring 16, they can withstand not only large axial forces but also large radial forces.

[0021] An L-shaped metal retaining ring 25 and a rubber sealing ring 26 are provided between the outer ring 16 and the inner ring 17 of the tapered roller 19 shown. The L-shaped metal retaining ring 25 and the rubber sealing ring 26 achieve the sealing effect of the space between the inner ring 17 and the outer ring 16, which can effectively prevent mud and water from entering the bearing 8 and damaging the bearing.

[0022] The composite sealing ring 10 shown is composed of a first folded metal frame 20, a second folded metal frame 21, a first rubber ring 22, a second rubber ring 23 and a metal ring 24. The first folded metal frame 20 is connected to the second folded metal frame 21 via the first rubber ring 22 and the second rubber ring 23. The metal ring 24 is located on the periphery of the second rubber ring 23.

Claims

1. A shaft head for connecting a disc rake blade and a support leg, comprising an outer flange (6), a spindle (7), and a bearing (8), wherein the outer flange is located around the spindle, the bearing is located between the spindle and the outer flange, and the spindle and the outer flange are connected via the bearing; characterized in that: The bearing is a double-row tapered roller bearing. A retaining ring (12) for limiting its position and a dust cover (13) to prevent mud and sand from entering are provided on the outer side of one end of the bearing. A bushing (9) for positioning and a composite sealing ring (10) for sealing are provided on the outer side of the other end of the bearing. A retaining ring (11) for limiting its position is provided on the outer side of the composite sealing ring.

2. The shaft head connecting the disc rake blade and the support leg according to claim 1, characterized in that: Bolt holes (15) are evenly provided around the outer flange (6). The outer flange is connected to the disc-shaped rake (2) by the second connecting bolt (5) inserted into the bolt hole. The support leg is fixedly connected to the spindle by the first connecting bolt (4) passing through the lower end of the support leg and the spindle (7).

3. The shaft head connecting the disc rake blade and the support leg according to claim 1 or 2, characterized in that: The bearing (8) consists of an outer ring (16), an inner ring (17), a cage (18), and tapered rollers (19). The outer ring is located outside the inner ring, the cage is located between the inner and outer rings, and the tapered rollers are placed on the cage. The tapered rollers are in contact with both the outer and inner rings. An L-shaped metal retainer (25) and a rubber seal (26) are provided between the inner and outer rings on the outer side of the tapered rollers for sealing.

4. The shaft head connecting the disc rake blade and the support leg according to claim 1 or 2, characterized in that: The composite sealing ring (10) is composed of a first folded metal frame (20), a second folded metal frame (21), a first rubber ring (22), a second rubber ring (23), and a metal ring (24). The first folded metal frame is connected to the second folded metal frame via the first rubber ring and the second rubber ring, and the metal ring is located on the periphery of the second rubber ring.

5. The shaft head connecting the disc rake blade and the support leg according to claim 1 or 2, characterized in that: An O-ring (14) is provided on the outer flange (6) around the dust cover (13).

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