Rotary cultivator shaft end sealing structure

Abstract

The utility model discloses a cutter shaft end sealing structure, and belongs to the field of rotary cultivators. Comprising a cutter shaft, and the left end and the right end of the cutter shaft are fixedly connected with a left shaft head and a right shaft head respectively; the gearbox connecting shaft sleeve is arranged in the side gearbox and arranged on the left shaft head in a sleeving mode, and a bearing is arranged between the gearbox connecting shaft sleeve and the left shaft head; the right connecting shaft sleeve is arranged in the right mounting plate and sleeves the right shaft head, and a bearing is arranged between the right connecting shaft sleeve and the right shaft head; the grass winding prevention assembly is used for preventing impact of weeds, silt and stones; the protection assembly is arranged in the side gearbox and the right mounting plate and used for blocking silt and preventing lubricating oil from flowing out; and sealing structures are arranged on the left shaft head and / or the right shaft head and the gearbox connecting shaft sleeve and the right connecting shaft sleeve. The cutter shaft end sealing structure has the beneficial effect that the cutter shaft end sealing structure is good in sealing effect.

Description

Technical Field

[0001] The present application relates to the field of rotary tillers, and in particular to a shaft end sealing structure of a rotary tiller. Background Art

[0002] A rotary tiller is a power-driven arable land machine that processes soil with a rotating blade as a working part. China is a vast country with a wide range of soil types, which can be simply divided into southern soil and northern soil. The northern soil is mainly dry land, which is loose, has a low water content, a narrow workload, and is sealed mainly for dust prevention; while the southern soil is mainly paddy fields, which are highly viscous, and there are dry land mixed with sand and gravel, with a wide workload, large vibration impact, and accompanied by stem entanglement / silt impact and acid-base corrosion. Therefore, according to the soil conditions, the needs of the north and south for rotary tillers are completely different. The rotary tillage of southern soil puts forward higher and more stringent requirements for the guide roller seal of the rotary tiller.

[0003] Therefore, a rotary tiller shaft end sealing structure with good sealing effect is needed. Utility Model Content

[0004] The content of this application is used to introduce concepts in a brief form, which will be described in detail in the detailed implementation section below. The content of this application is not intended to identify the key features or essential features of the technical solution claimed for protection, nor is it intended to limit the scope of the technical solution claimed for protection.

[0005] In order to solve the technical problems mentioned in the above background technology section, some embodiments of the present application provide a rotary tiller shaft end sealing structure, including a cutter shaft, the left and right ends of the cutter shaft are respectively fixedly connected with a left shaft head and a right shaft head, the rotary tiller has a side gearbox and a right mounting plate, characterized in that: the cutter shaft end sealing structure also includes: a gearbox connecting sleeve, fixed to one side of the side gearbox and sleeved on the left shaft head, a bearing is arranged between the gearbox connecting sleeve and the left shaft head, the inner ring of the bearing is sleeved on the left shaft head, and the gearbox connecting sleeve is sleeved on the outer ring of the bearing; a right connecting sleeve, fixed to one side of the right mounting plate and sleeved on the right shaft head, a bearing is arranged between the right connecting sleeve and the right shaft head, The inner ring of the bearing is sleeved on the right shaft head, and the right connecting sleeve is sleeved on the outer ring of the bearing; the anti-grass entanglement component is used to prevent the impact of weeds, mud and stones; the protection component is arranged between the gearbox connecting sleeve, the left shaft head and the right connecting sleeve and the right shaft head, and is used to block mud and prevent the lubricating oil from flowing out; the left shaft head and the right shaft head have abutment surfaces perpendicular to the axis and annular surfaces connecting the abutment surfaces and surrounding the axis, and the abutment surfaces and the annular surfaces are combined to form a sealing structure; the gearbox connecting sleeve and the right connecting sleeve are provided with sealing grooves respectively embedded with the sealing structures on the left shaft head and the right shaft head, and the gap between the sealing structure and the sealing groove is filled with high-temperature resistant and water-resistant grease.

[0006] Furthermore, the sealing structure on the left shaft head is a stepped shaft mechanism, and a stepped groove matching the stepped shaft structure is provided on the gearbox connecting sleeve; the sealing structure on the right shaft head is configured as an axially raised annular protrusion, and a sealing groove for the annular protrusion to be embedded is provided on the right connecting sleeve.

[0007] Furthermore, the protection component includes at least one of a combined anti-mud and water oil seal and a skeleton oil seal.

[0008] Furthermore, the protective component between the gearbox connecting sleeve and the left shaft head includes: a skeleton oil seal and a combined anti-mud and water oil seal arranged in the gap between the left shaft head and the gearbox connecting sleeve, and the skeleton oil seal is located on the side of the combined anti-mud and water oil seal away from the bearing.

[0009] Furthermore, the protective component between the right connecting sleeve and the right shaft head includes: a combined anti-mud and water oil seal arranged in the gap between the right connecting sleeve and the right shaft head, and the combined anti-mud and water oil seal is arranged between the sealing structure and the bearing.

[0010] Furthermore, the gap between the skeleton oil seal and the combined anti-mud and water oil seal is also filled with high temperature resistant and water resistant grease.

[0011] Furthermore, a left sealing shell is fixedly connected to one side of the side gearbox. An oil storage space extending to the bearing and located on the side of the bearing away from the combined mud and water oil seal is provided between the side gearbox, the left sealing shell, the left shaft head, and the gearbox connecting sleeve. The oil storage space is used to store lubricating oil, and the skeleton oil seal and the combined anti-mud and water oil seal seal the oil storage space.

[0012] Furthermore, a right sealing shell is fixedly connected to one side of the right connecting sleeve, and an oil storage space is provided between the right sealing shell, the right connecting sleeve and the right shaft head, which extends to the bearing and is located on the side of the bearing away from the combined mud and water oil seal, and is used to store lubricating oil or grease. The combined mud and water proof oil seal seals the oil storage space.

[0013] Furthermore, the anti-grass entanglement component includes: an outer anti-grass ring and an inner anti-grass ring; a left mounting plate is fixedly connected to one side of the side gearbox, the outer anti-grass ring is fixedly connected to the left mounting plate, the inner anti-grass ring is fixedly connected to the left shaft head, and the outer anti-grass ring is sleeved on the inner anti-grass ring; the outer anti-grass ring is fixedly connected to the right mounting plate, the inner anti-grass ring is fixedly connected to the right shaft head, and the outer anti-grass ring is sleeved on the inner anti-grass ring.

[0014] The beneficial effect of the present application is that it provides a knife shaft end sealing structure with good sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The illustrative embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application.

[0016] In addition, throughout the drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and that the components and elements are not necessarily drawn to scale.

[0017] In the attached picture:

[0018] Figure 1 is an overall schematic diagram according to an embodiment of the present application;

[0019] Figure 2 yes Figure 1 An overall cross-sectional view of an embodiment;

[0020] Figure 3 yes Figure 2 A partial enlarged view of the middle left shaft head;

[0021] Figure 4 yes Figure 2 A partial enlarged view of the middle right shaft head.

[0022] Reference numerals:

[0023] 100. Left shaft head; 101. Right shaft head; 102. Side gearbox; 103. Gearbox connecting sleeve; 104. Right connecting sleeve; 106. Protective assembly; 107. Gear; 108. Abutment surface; 109. Annular surface; 110. Annular raised portion; 111. Combined anti-mud and water oil seal; 112. Skeleton oil seal; 113. Outer anti-grass ring; 114. Inner anti-grass ring; 115. Cylindrical portion; 116. Mounting portion; 117. Right mounting plate; 118. Knife shaft; 119. Left sealing shell; 120. Right sealing shell; 121. Left mounting plate. DETAILED DESCRIPTION

[0024] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not intended to limit the scope of protection of the present disclosure.

[0025] It should also be noted that, for ease of description, only the parts related to the invention are shown in the drawings. In the absence of conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.

[0026] It should be noted that the concepts such as "first" and "second" mentioned in the present disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0027] It should be noted that the modifications of "one" and "plurality" mentioned in the present disclosure are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0028] The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0029] Reference Figure 1-4 The rotary tiller shaft end sealing structure includes: a cutter shaft 118, a left shaft head 100, a right shaft head 101, a side gearbox 102, a right mounting plate 117, a gearbox connecting sleeve 103, a right connecting sleeve 104, an anti-grass entanglement component 105, and a protection component 106. The left shaft head 100 and the right shaft head 101 are respectively fixed on the left and right shaft heads of the cutter shaft 118.

[0030] In one embodiment, the gearbox connecting sleeve 103 is fixed to one side of the side gearbox 102 and sleeved on the left shaft head 100, and a bearing is arranged between the gearbox connecting sleeve 103 and the left shaft head 100. The inner ring of the bearing is sleeved on the left shaft head 100, and the outer ring of the bearing abuts against the gearbox connecting sleeve 103. A left sealing shell 119 is fixedly connected to one side of the side gearbox 102 by screws, and an oil storage space extending to the bearing is provided between the left sealing shell 119, the gearbox connecting sleeve 103, the left shaft head 100, and the side gearbox 102 for storing lubricating oil.

[0031] In one embodiment, a sealing structure is provided on the left shaft head 100, and the sealing structure is configured as a stepped shaft structure having an abutting surface 108 perpendicular to the axis and an annular surface 109 connecting the abutting surface 108 and surrounding the axis. A stepped groove is provided on the gearbox connecting sleeve 103 to engage with the stepped shaft structure. The gap between the stepped groove and the abutting surface 108 and the annular surface 109 is as small as possible to prevent mud and sand from entering. The gap between the abutting surface 108, the annular surface 109 and the gearbox connecting sleeve 103 is filled with high temperature resistant and water resistant grease to prevent mud and sand from entering, and to delay the physical or chemical damage of mud and sand, acid and alkali substances to the protective components to the greatest extent.

[0032] The right connecting sleeve 104 is fixed to one side of the right mounting plate 117 and sleeved on the right shaft head 101, and a bearing is also arranged between the right connecting sleeve 104 and the right shaft head 101. The inner ring of the bearing is sleeved on the right shaft head 101, and the right connecting sleeve 104 is sleeved on the outer ring of the bearing. One side of the right connecting sleeve 104 is fixedly connected to the right sealing shell 120 by screws, and there is also an oil storage space extending to the bearing between the right sealing shell 120 and the right connecting sleeve 104 and the right shaft head 101, which is used to store lubricating oil.

[0033] In one embodiment, a sealing structure is provided on the right shaft head 101, and the sealing structure includes an annular protrusion 110 extending in the axial direction, and the annular protrusion 110 also has an abutment surface 108 perpendicular to the axis and an annular surface 109 of the axis. A sealing groove for the annular protrusion to be embedded is provided on the right connecting sleeve 104, and the projection of the contact surface of the annular protrusion 110 embedded in the sealing groove on the shaft section is a "J"-shaped structure, and the gap between the annular protrusion 110 and the sealing groove is filled with high temperature and water-resistant grease to prevent mud and sand from entering, and to delay the physical or chemical damage of mud and sand, acid and alkali substances to the protective components to the greatest extent.

[0034] The protective component 106 in the side gearbox 102 includes: a combined anti-mud and water oil seal 111 and a skeleton oil seal 112. The combined anti-mud and water oil seal 111 and the skeleton oil seal 112 are arranged in the gap between the gearbox connecting sleeve 103 and the left shaft head 100 and are located between the sealing structure and the bearing to seal the oil storage space. The combined anti-mud and water oil seal 111 is located on the side of the bearing away from the left sealing shell 119, and the skeleton oil seal 112 is located on the side of the combined anti-mud and water oil seal 111 away from the bearing. The inner and outer sides of the skeleton oil seal 112 abut against the gearbox connecting sleeve 103 and the left shaft head 100 respectively. The gap between the skeleton oil seal 112 and the combined anti-mud and water oil seal 111 is also filled with high temperature resistant and water resistant grease to protect the combined anti-mud and water oil seal as much as possible and delay its damage by mud or acidic and alkaline substances. The skeleton oil seal 112 is used as the first barrier to prevent mud and sand from entering, and protects the combined anti-mud and water oil seal 111 located on the bearing side, extending the service life of the combined anti-mud and water oil seal 111. The combined anti-mud and water oil seal 111 is used to prevent the lubricating oil from flowing out and serves as the second barrier to prevent mud and water from entering.

[0035] The protection assembly 106 in the right mounting plate 117 includes: a combined anti-mud and water oil seal 111 arranged on the side of the bearing away from the right sealing shell 120, the combined anti-mud and water oil seal 111 is arranged in the gap between the right connecting sleeve 104 and the right shaft head 101, wherein the outer side and the inner side of the combined anti-mud and water oil seal 111 are respectively abutted against the right connecting sleeve 104 and the right shaft head 101, and the combined anti-mud and water oil seal 111 is arranged between the sealing structure and the bearing to seal the oil storage space, preventing the lubricating oil from flowing out and preventing mud and water from entering to avoid contaminating the lubricating oil.

[0036] The anti-weed entanglement assembly includes: an outer anti-weed ring 113 and an inner anti-weed ring 114. A left mounting plate 121 is fixedly connected to one side of the side gearbox 102. The outer anti-weed ring 113 is arranged on the left mounting plate 121 and the right mounting plate 117. The outer anti-weed ring 113 has a cylindrical portion 115 extending along the axial direction and a mounting portion 116 fixed at one end edge of the cylindrical portion 115 and perpendicular to the axis. The outer anti-weed ring 113 is fixedly connected to the left mounting plate 121 and the right mounting plate 117 through the mounting portion 116. The inner anti-weed ring 114 is fixed to the left shaft head 100 and the right shaft head 101. The inner anti-weed ring 114 also has a cylindrical structure extending along the axis and is sleeved on the outer side of the gearbox connecting sleeve 103 and the right connecting sleeve 104.

[0037] In one embodiment, the outer weed prevention ring 113 is set on the inner weed prevention ring 114 to fully protect the gap between the shaft head and the bearing seat from being impacted by weeds, mud and stones, thereby maximizing the working environment of the oil seal and extending its service life.

[0038] In one embodiment, the outer grass-proof ring 113 and the inner grass-proof ring 114 are both made of stainless steel plates.

[0039] In one embodiment, a gear 107 is fixedly connected to the left shaft head 100 . The gear 107 is located on the side of the bearing away from the combined anti-mud and water oil seal 111 . The power of the rotary tiller gearbox is transmitted to the left shaft head 100 through the gear 107 .

[0040] The above descriptions are only some preferred embodiments of the present disclosure and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the embodiments of the present disclosure is not limited to the technical solutions formed by a specific combination of the above-mentioned technical features, but should also cover other technical solutions formed by any combination of the above-mentioned technical features or their equivalent features without departing from the above-mentioned inventive concept. For example, the above-mentioned features are replaced with the technical features with similar functions disclosed in the embodiments of the present disclosure (but not limited to) and the technical solutions formed.

Claims

1. A rotary tiller shaft end sealing structure includes a cutter shaft, and the left and right ends of the cutter shaft are respectively fixedly connected with a left shaft head and a right shaft head. The rotary tiller has a side gearbox and a right mounting plate, and is characterized in that: The rotary tiller shaft end sealing structure also includes: The gearbox connecting sleeve is fixed on one side of the side gearbox and sleeved on the left shaft head. A bearing is arranged between the gearbox connecting sleeve and the left shaft head. The inner ring of the bearing is sleeved on the left shaft head, and the gearbox connecting sleeve is sleeved on the outer ring of the bearing. The right connecting sleeve is fixed on one side of the right mounting plate and sleeved on the right shaft head. A bearing is arranged between the right connecting sleeve and the right shaft head. The inner ring of the bearing is sleeved on the right shaft head, and the right connecting sleeve is sleeved on the outer ring of the bearing. Anti-weed component, used to prevent weeds, mud and stones from impacting; A protective component is arranged between the gearbox connecting sleeve, the left shaft head and the right connecting sleeve, the right shaft head, and is used to block mud and prevent lubricating oil from flowing out; The left shaft head and the right shaft head are provided with abutment surfaces perpendicular to the axis and annular surfaces connecting the abutment surfaces and surrounding the axis, and the abutment surfaces and the annular surfaces are combined to form a sealing structure; The gearbox connecting sleeve and the right connecting sleeve are both provided with sealing grooves which are respectively engaged with the sealing structures on the left shaft head and the right shaft head, and the gap between the sealing structure and the sealing groove is filled with high temperature resistant and water resistant grease.

2. The rotary tiller shaft end sealing structure according to claim 1, characterized in that: The sealing structure on the left shaft head is a stepped shaft mechanism, and the gearbox connecting sleeve is provided with a stepped groove matching the stepped shaft structure; The sealing structure on the right shaft head is configured as an axially protruding annular protrusion, and the right connecting sleeve is provided with a sealing groove for the annular protrusion to be embedded.

3. The rotary tiller shaft end sealing structure according to claim 2, characterized in that: The protection component includes at least one of a combined anti-mud and water oil seal and a skeleton oil seal.

4. The rotary tiller shaft end sealing structure according to claim 3, characterized in that: The protective component between the gearbox connecting sleeve and the left shaft head includes: a skeleton oil seal and a combined anti-mud and water oil seal arranged in the gap between the left shaft head and the gearbox connecting sleeve, and the skeleton oil seal is located on the side of the combined anti-mud and water oil seal away from the bearing.

5. The rotary tiller shaft end sealing structure according to claim 3, characterized in that: The protective component between the right connecting sleeve and the right shaft head includes: a combined anti-mud and water oil seal arranged in the gap between the right connecting sleeve and the right shaft head, and the combined anti-mud and water oil seal is arranged between the sealing structure and the bearing.

6. The rotary tiller shaft end sealing structure according to claim 4, characterized in that: The gap between the skeleton oil seal and the combined anti-mud and water oil seal is also filled with high temperature resistant and water resistant grease.

7. The rotary tiller shaft end sealing structure according to claim 4, characterized in that: A left sealing shell is fixedly connected to one side of the side gearbox. An oil storage space extending to the bearing and located on the side of the bearing away from the combined mud and water oil seal is provided between the side gearbox, the left sealing shell, the left shaft head and the gearbox connecting sleeve. The oil storage space is used to store lubricating oil. The skeleton oil seal and the combined anti-mud and water oil seal seal the oil storage space.

8. The rotary tiller shaft end sealing structure according to claim 5, characterized in that: A right sealing shell is fixedly connected to one side of the right connecting sleeve. An oil storage space extending to the bearing and located on the side of the bearing away from the combined mud and water oil seal is provided between the right sealing shell, the right connecting sleeve and the right shaft head. The oil storage space is used to store lubricating oil or grease. The combined anti-mud and water oil seal seals the oil storage space.

9. The rotary tiller shaft end sealing structure according to claim 1, characterized in that: The anti-weed entanglement component comprises: an outer anti-weed ring and an inner anti-weed ring; A left mounting plate is fixedly connected to one side of the side gearbox, an outer weed-proof ring is fixedly connected to the left mounting plate, an inner weed-proof ring is fixedly connected to the left shaft head, and the outer weed-proof ring is sleeved on the inner weed-proof ring; An outer weed-proof ring is fixedly connected to the right mounting plate, an inner weed-proof ring is fixedly connected to the right shaft head, and the outer weed-proof ring is sleeved on the inner weed-proof ring.

Images