Cutter shaft driving assembly capable of improving sealing effect

Abstract

The utility model belongs to the technical field of agricultural machinery cutter shafts, and particularly relates to a cutter shaft driving assembly for improving the sealing effect, which comprises a fixed seat, a connecting disc, a bearing and a transmission gear. The transmission gear and the top of a shaft body of the connecting disc are connected and can rotate synchronously, the transmission gear transmits power to the connecting disc, the connecting disc is installed in the fixing base through a bearing, the fixing base is detachably installed on the box body, and the connecting disc drives the rotating cutter shaft to rotate. The connecting disc further comprises a check ring arranged on the disc face of the connecting disc, a groove is formed in the outer end face of the fixing base and matched with the check ring, and when the connecting disc is installed on the fixing base, the check ring is inserted into the groove. And at least one framework oil seal and a muddy water oil seal are fixedly mounted on the inner ring of the fixed seat. When the cutter shaft moves at a high speed, soil and crushed grass can be prevented from entering the joint of the connecting disc and the transmission gear, water and dust can also be prevented from entering, and leakage of lubricating oil is also avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of agricultural machinery knife shafts, and particularly relates to a knife shaft drive assembly for improving the sealing effect. Background Technique

[0002] Agricultural machinery plays a crucial role in modern agriculture. Many agricultural machines are equipped with knife shafts for operations such as cutting, crushing, and soil turning, such as rotary tillers, mowers, straw crushers, straw returning machines, paddy field levelers, and micro-tillers.

[0003] The working environment of the agricultural machinery knife shaft is usually relatively harsh, and it often faces the erosion of soil, broken grass, moisture, and dust. After moisture enters the knife shaft drive gear, it will cause the corrosion of gears, bearings, etc., resulting in increased gear wear. After particulate matter such as sand grains or soil enters the transmission gear, it will become an abrasive. During the rotation of the gear, the hard particles will accelerate the wear of the gear surface, reduce the transmission efficiency and accuracy, and even cause the gear to get stuck. At the same time, for the knife shaft drive component with poor sealing performance, with the leakage of lubricating oil, the lubricating oil in the transmission box will be insufficient, the lubrication condition will deteriorate, and the gear will operate under high friction, resulting in increased wear.

[0004] For the existing knife shaft drive components, the sealing is mainly achieved by setting floating oil seals at the connection with the transmission box housing. With long-term use, the performance of the floating oil seals decreases, resulting in poor sealing effect and requiring frequent maintenance. Content of the Utility Model

[0005] Aiming at the above deficiencies of the existing technology, the problem to be solved by the utility model is that for the existing knife shaft drive components, due to high-speed rotation, high requirements are imposed on the sealing performance, and the existing floating oil seal sealing structure urgently needs to be improved. The utility model provides a knife shaft drive assembly for improving the sealing effect, which is stable and reliable, can reduce the maintenance frequency, block the erosion of soil, broken grass, moisture, and dust, and avoid the leakage of lubricating oil.

[0006] To achieve the above purpose, the utility model provides a knife shaft drive assembly for improving the sealing effect, including a fixed seat, a connection disk, a bearing, and a transmission gear.

[0007] The transmission gear is connected to the top of the shaft body of the connection disk and can rotate synchronously. The transmission gear transmits power to the connection disk. The connection disk is installed in the fixed seat through a bearing. The fixed seat is detachably installed on the box body. The connection disk drives the rotating knife shaft to rotate.

[0008] It further includes a blocking ring arranged on the disk surface of the connection disk. A groove is arranged on the outer end surface of the fixed seat to cooperate with the blocking ring. When the connection disk is installed on the fixed seat, the blocking ring is inserted into the groove.

[0009] At least one skeleton oil seal and one muddy water oil seal are fixedly installed on the inner ring of the fixed seat.

[0010] According to another embodiment of the present invention or any one of the foregoing embodiments of the tool shaft drive assembly, wherein there are more than two of the blocking rings, which are integrally formed with the connecting disk. The integrally formed blocking rings have stronger structural force and better positioning accuracy.

[0011] According to another embodiment of the present invention or any one of the foregoing embodiments of the tool shaft drive assembly, it further includes an O-ring, and the O-ring is installed between the fixed seat and the transmission housing.

[0012] According to another embodiment of the present invention or any one of the foregoing embodiments of the tool shaft drive assembly, wherein a thread is provided at the top of the shaft body of the connecting disk, and a nut axially locks the connecting disk and the transmission gear.

[0013] According to another embodiment of the present invention or any one of the foregoing embodiments of the tool shaft drive assembly, wherein a retaining ring is provided at the connection between the nut and the top of the shaft body of the connecting disk.

[0014] According to another embodiment of the present invention or any one of the foregoing embodiments of the tool shaft drive assembly, wherein the skeleton oil seal is installed near the disk surface on the inner ring of the fixed seat, and the muddy water oil seal is installed near the bearing on the inner ring of the fixed seat.

[0015] Advantages of the present invention:

[0016] For the tool shaft drive assembly with improved sealing effect of the present invention, a blocking ring is provided to prevent mud and broken grass from entering the joint between the connecting disk and the transmission gear when the tool shaft is moving at high speed. Through the skeleton oil seal and the muddy water oil seal, the exposed fixed seat is double-protected to avoid moisture and dust from entering and also avoid leakage of lubricating oil. The present invention has a good sealing effect, can work stably for a long time, and improves the service life of the tool shaft drive assembly. Brief description of the drawings

[0017] Figure 1 It is a three-dimensional schematic diagram of the tool shaft drive assembly with improved sealing effect of the present invention installed on the power box;

[0018] Figure 2 It is an exploded assembly schematic diagram of the tool shaft drive assembly with improved sealing effect of the present invention installed on the power box;

[0019] Figure 3 It is a cross-sectional schematic diagram of the tool shaft drive assembly with improved sealing effect of the present invention installed in the power box;

[0020] In the figure: 1, transmission box body; 2, fixed seat; 3, connecting plate; 301, retaining ring; 4, skeleton oil seal; 5, muddy water oil seal; 6, O-ring; 7, bearing; 8, transmission gear; 9, nut; 10, rotating cutter shaft. Specific implementation mode

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] As Figure 1 , 3 shown, a cutter shaft drive assembly for improving the sealing effect includes a fixed seat 2, a connecting plate 3, a bearing 7, and a transmission gear 8. The transmission gear 8 is connected to the top of the shaft body of the connecting plate 3 and can rotate synchronously. The transmission gear 8 transmits power to the connecting plate 3. The connecting plate 3 is installed in the fixed seat 2 through the bearing 7. The fixed seat 2 is detachably installed on the box body. The connecting plate 3 drives the rotating cutter shaft 10 to rotate. It also includes an O-ring 6, and the O-ring 6 is installed between the fixed seat 2 and the transmission box body 1. The top of the shaft body of the connecting plate 3 is provided with a thread, and the nut 9 axially locks the connecting plate 3 and the transmission gear 8. A retaining ring is provided at the connection between the nut 9 and the top of the shaft body of the connecting plate 3.

[0023] As Figure 2 , 3 shown, a retaining ring 301 is provided on the disk surface of the connecting plate 3. A groove is provided on the outer end surface of the fixed seat 2 to cooperate with the retaining ring 301. When the connecting plate 3 is installed on the fixed seat 2, the retaining ring 301 is inserted into the groove. There are more than two retaining rings 301, which are integrally formed with the connecting plate 3. The integrally formed retaining ring 301 has stronger structural strength and better positioning accuracy.

[0024] As Figure 3 shown, at least one skeleton oil seal 4 and one muddy water oil seal 5 are fixedly installed on the inner ring of the fixed seat 2. The skeleton oil seal 4 is installed near the disk surface on the inner ring of the fixed seat 2, and the muddy water oil seal 5 is installed near the bearing 7 on the inner ring of the fixed seat 2.

[0025] Working principle of the present invention:

[0026] In the present invention, a retaining ring 301 is provided inside the connecting plate 3. The retaining ring 301 cooperates with the groove of the fixed seat 2 to form a square structure, avoiding soil, broken grass, and dust from entering the bearing 7, gear, and transmission box along the inner disk surface and shaft body of the connecting plate 3 when the connecting plate 3 moves at high speed.

[0027] Regarding external moisture, internal lubricating oil, or other liquids, the present utility model provides a double-sealing structure of a skeleton oil seal 4 and a muddy water oil seal 5 at the connection between the connecting disc 3 and the bearing 7. There is a metal skeleton inside the skeleton oil seal 4. This structure provides additional strength and rigidity, enabling the oil seal to more stably maintain its shape and position, and maintaining a good sealing effect even under high pressure and high rotational speed. The outer layer is usually made of high-quality rubber or other elastic materials. These materials have good elasticity and wear resistance, and can closely fit between the drive shaft and the housing to form an effective seal. The muddy water oil seal 5 is made of high-quality rubber or other elastic materials and can closely fit between the drive shaft and the housing to form an effective barrier to prevent dirt, moisture, and other impurities from entering the interior. Usually, the muddy water oil seal 5 is designed with a multi-lip structure, and each lip contacts the drive shaft to further enhance the sealing effect. The muddy water oil seal 5 is made of wear-resistant materials and can withstand the rotation and friction of the drive shaft to ensure good sealing performance during long-term use.

[0028] With the above settings, the present utility model reduces the number of shutdown maintenance times of the cutter shaft drive assembly and improves the service life of the cutter shaft drive assembly. It is suitable for being arranged in rotary tillers, lawn mowers, straw crushers, straw returning machines, paddy field levelers, and micro-tillers, with a wide range of applications.

[0029] The above shows and describes the basic principles, main features, and advantages of the present utility model. Those skilled in the art should understand that the above embodiments are only for explaining the technical concept and features of the present utility model, and their purpose is to enable those familiar with this technology to understand the content of the present utility model and implement it. It cannot be used to limit the protection scope of the present utility model. Any equivalent changes or modifications made according to the spirit of the present utility model should be covered within the protection scope of the present utility model.

Claims

1. A cutter shaft drive assembly for improving the sealing effect, comprising a fixed seat (2), a connecting disk (3), a bearing (7), and a transmission gear (8). The transmission gear (8) is connected to the top of the shaft body of the connecting disk (3) and can rotate synchronously. The transmission gear (8) transmits power to the connecting disk (3). The connecting disk (3) is installed in the fixed seat (2) through the bearing (7). The fixed seat (2) is detachably installed on the box body. The connecting disk (3) drives the rotating cutter shaft (10) to rotate. It is characterized in that: It further includes a blocking ring (301) arranged on the disk surface of the connecting disk (3). A groove is provided on the outer end surface of the fixed seat (2) to cooperate with the blocking ring (301). When the connecting disk (3) is installed on the fixed seat (2), the blocking ring (301) is inserted into the groove. At least one skeleton oil seal (4) and a muddy water oil seal (5) are fixedly installed on the inner ring of the fixed seat (2).

2. The cutter shaft drive assembly for improving the sealing effect according to claim 1, wherein: There are more than two blocking rings (301), which are integrally formed with the connecting disk (3). The integrally formed blocking ring (301) has stronger structural force and better positioning accuracy.

3. A cutter shaft drive assembly for improving sealing effect according to claim 1, characterized in that: It further includes an O-ring (6), and the O-ring (6) is installed between the fixed seat (2) and the transmission box body (1).

4. A cutter shaft drive assembly for improving the sealing effect according to claim 1, characterized in that: A thread is provided at the top of the shaft body of the connecting disk (3), and a nut (9) axially locks the connecting disk (3) and the transmission gear (8).

5. The cutter shaft drive assembly for improving the sealing effect according to claim 4, characterized in that: A retaining ring is provided at the connection between the nut (9) and the top of the shaft body of the connecting disk (3).

6. The knife shaft drive assembly for improving the sealing effect according to claim 1, wherein: The skeleton oil seal (4) is installed near the disk surface on the inner ring of the fixed seat (2), and the muddy water oil seal (5) is installed near the bearing (7) on the inner ring of the fixed seat (2).

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