Tensioning chain wheel sealing structure and harvester
By using maintenance-free bearings and bottom guards in the tensioning sprocket of the harvester, the problem of debris entering caused by the gaps in the bottom of the sprocket in the prior art is solved, and the reliability of the sprocket and the working performance of the harvester are improved.
Patent Information
- Application Number
- CN202422180372.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-05
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-09-05
AI Technical Summary
In the prior art, there is a large gap at the bottom of the tensioning sprocket, and dust, debris, or grass stems are prone to enter the sprocket structure, causing the sprocket structure to fail and affect the operating reliability of the harvester.
Maintenance-free bearings are used as the mounting bearing for the tensioning sprocket. The sprocket is installed to the outside of the maintenance-free bearing. The maintenance-free bearing sleeve is installed outside the rotating shaft and is carried by the installation boss. The top cover plate is buckled on the top of the maintenance-free bearing to close the top gap. The bottom guard surrounds the bottom end of the maintenance-free bearing to seal the bottom gap.
It effectively avoids dust, debris or grass stems and other debris into the sprocket structure, reduces the occurrence of sprocket failures, and improves the operating reliability of the harvester.
Smart Images
Figure CN222910678U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of agricultural machinery, and particularly relates to a tensioning sprocket sealing mechanism and a harvester. Background Art
[0002] With the continuous improvement of agricultural machinery technology and the increasing demand of agricultural machinery users for fine harvesting, agricultural machinery users pay more attention to the feeding performance of the cutting table.
[0003] The sprockets on the harvester are mainly used to engage with the chain and transmit power. When the materials are fed at the front end of the harvester, a large number of stalks are fed into the harvester along the chain, and the reliability of the tensioning sprockets in the harvester is very important.
[0004] In the prior art, there is a large gap at the bottom of the tensioning sprocket, and it is easy for sundries such as dust, debris or grass stems to enter the sprocket structure, resulting in the failure of the sprocket structure and affecting the operation reliability of the harvester. Summary of the Utility Model
[0005] The purpose of the utility model is to provide a sprocket sealing mechanism and a harvester to alleviate the technical problem that there is a large gap at the bottom of the tensioning sprocket in the prior art, and it is easy for sundries to enter the tensioning sprocket structure, resulting in the failure of the tensioning sprocket structure and affecting the operation reliability of the harvester.
[0006] The utility model provides a tensioning sprocket sealing structure, which comprises a mounting support, a maintenance-free bearing, a sprocket, a top cover plate and a bottom protection piece; a rotating shaft is arranged on the mounting support, and a mounting boss is arranged on the rotating shaft; the maintenance-free bearing has a shaft hole, and the maintenance-free bearing is arranged on the mounting boss and sleeved outside the rotating shaft through the shaft hole; the sprocket is arranged outside the maintenance-free bearing to rotate following the maintenance-free bearing; the top cover plate is buckled on the top of the maintenance-free bearing to cover the top end of the shaft hole; the bottom protection piece comprises a bottom plate and an outer plate, the bottom plate is an annular plate, the mounting boss is arranged in the inner hole of the annular plate, and the inner wall of the inner hole of the annular plate is attached to the outer side wall of the mounting boss, the bottom surface of the bottom plate is attached to the top surface of the mounting support, and the outer plate is arranged on the outer side of the bottom plate along the circumference of the bottom plate and is located outside the bottom end of the maintenance-free bearing.
[0007] Furthermore, the outer plate is inclined; the outer plate extends towards the direction close to the sprocket, and the bottom end of the maintenance-free bearing is located between the bottom plate and the outer plate.
[0008] Furthermore, the bottom protection piece further comprises an inner plate; the inner plate is arranged on the bottom plate along the circumference of the inner hole, and the inner wall of the inner plate is attached to the outer wall of the mounting boss.
[0009] Furthermore, the bottom protective part is an integrated structure.
[0010] Furthermore, the maintenance-free bearing has a rotating part and a mounting part; the rotating part is arranged outside the mounting part, the mounting part is a cylindrical structure, and the mounting part is arranged on the mounting boss and sleeved outside the rotating shaft, and the rotating part can rotate with the mounting part as the axis; a horizontal limiting part is arranged on the rotating shaft, and the bottom surface of the horizontal limiting part abuts against the top surface of the mounting part; the top cover plate is buckled on the top of the rotating part.
[0011] Furthermore, the bottom end of the top cover plate abuts against the top surface of the horizontal limiting part; the top cover plate and the top opening of the rotating part are in interference fit.
[0012] Furthermore, the top cover plate includes a skeleton and an adhesive layer; the skeleton is in a bowl-shaped structure, and the adhesive layer is arranged outside the skeleton to wrap the skeleton.
[0013] Furthermore, the top cover plate has an avoidance hole; the top cover plate is buckled on the top end of the maintenance-free bearing, the rotating shaft is located in the avoidance hole, and the inner wall of the avoidance hole abuts against the side wall of the horizontal limiting part.
[0014] Furthermore, a baffle is arranged along the circumferential direction of the edge of the top cover plate; the baffle extends downward to abut against the sprocket.
[0015] The purpose of the present utility model also lies in providing a harvester, including the provided tensioning sprocket sealing structure.
[0016] Beneficial effects:
[0017] The tensioning sprocket sealing structure provided by the present utility model includes a mounting support, a maintenance-free bearing, a sprocket, a top cover plate and a bottom protective part; a rotating shaft is arranged on the mounting support, and a mounting boss is arranged on the rotating shaft; the maintenance-free bearing has a shaft hole, and the maintenance-free bearing is arranged on the mounting boss and sleeved outside the rotating shaft through the shaft hole; the sprocket is arranged outside the maintenance-free bearing to rotate following the maintenance-free bearing; the top cover plate is buckled on the top of the maintenance-free bearing to seal the top end of the shaft hole; the bottom protective part includes a bottom plate and an outer plate, the bottom plate is an annular plate, the mounting boss is arranged in the inner hole of the annular plate and the hole wall of the inner hole of the annular plate fits with the outer side wall of the mounting boss, the bottom surface of the bottom plate fits with the top surface of the mounting support, and the outer plate is arranged along the circumferential direction of the bottom plate outside the bottom plate and is located outside the bottom end of the maintenance-free bearing.
[0018] Specifically, the utility model adopts a maintenance-free bearing as the installation bearing of the tensioning sprocket. The sprocket is installed on the outer side of the maintenance-free bearing. The maintenance-free bearing is sleeved outside the rotating shaft and carried by the installation boss. The top cover plate is buckled on the top of the maintenance-free bearing to seal the top gap of the maintenance-free bearing. After the bottom surface of the bottom plate of the bottom protection part is attached to the installation support, the inner ring of the bottom plate is attached to the side wall of the installation boss, and the outer plate is arranged outside the bottom plate to enclose the bottom end of the maintenance-free bearing, so as to block the gap between the bottom surface of the maintenance-free bearing and the top surface of the installation support, and prevent sundries such as dust, debris or grass stems from entering the sprocket structure through the bottom gap of the tensioning sprocket structure, resulting in the failure of the sprocket structure and affecting the operation reliability of the harvester. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0020] Figure 1 The front view structural schematic diagram of the tensioning wheel sealing structure provided by Embodiment 1 of the present utility model;
[0021] Figure 2 The side view structural schematic diagram of the tensioning wheel sealing structure provided by Embodiment 1 of the present utility model;
[0022] Figure 3 For Figure 2 the A-A cross-sectional view in
[0023] Figure 4 The top view structural schematic diagram of the bottom protection part in the tensioning wheel sealing structure provided by Embodiment 1 of the present utility model;
[0024] Figure 5 For Figure 4 the B-B cross-sectional view in
[0025] Figure 6 The front view structural schematic diagram of the tensioning wheel sealing structure provided by Embodiment 2 of the present utility model.
[0026] ICON:
[0027] 100 - Installation support; 110 - Rotating shaft; 111 - Installation boss; 200 - Maintenance-free bearing; 210 - Rotating part; 220 - Installation part; 300 - Sprocket; 400 - Top cover plate; 500 - Bottom protection part; 510 - Bottom plate; 520 - Outer plate; 530 - Inner plate. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.
[0029] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model claimed, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.
[0030] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.
[0031] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be construed as indicating or implying relative importance.
[0032] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.
[0033] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0034] The present utility model will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.
[0035] Embodiment 1
[0036] Refer to Figures 1 to 5 , the tensioning sprocket sealing structure provided in this embodiment includes a mounting support 100, a maintenance-free bearing 200, a sprocket 300, a top cover plate 400, and a bottom protection member 500.
[0037] Among them, a rotating shaft 110 is provided on the mounting support 100, and a mounting boss 111 is provided on the rotating shaft 110.
[0038] The maintenance-free bearing 200 has a shaft hole, and the maintenance-free bearing 200 is arranged on the mounting boss 111 and sleeved outside the rotating shaft 110 through the shaft hole. The sprocket 300 is arranged outside the maintenance-free bearing 200 to rotate following the maintenance-free bearing 200.
[0039] Specifically, the maintenance-free bearing 200 in this embodiment serves as the mounting bearing of the tensioning sprocket 300. The sprocket 300 is installed outside the maintenance-free bearing 200. The maintenance-free bearing 200 is sleeved outside the rotating shaft 110 and is carried by the mounting boss 111.
[0040] The top cover plate 400 is buckled on the top of the maintenance-free bearing 200 to cover the top end of the shaft hole.
[0041] The bottom protection member 500 includes a bottom plate 510 and an outer plate 520. The bottom plate 510 is an annular plate. The mounting boss 111 is arranged in the inner hole of the annular plate, and the inner hole wall of the annular plate fits with the outer side wall of the mounting boss 111. The bottom surface of the bottom plate 510 fits with the top surface of the mounting support 100. The outer plate 520 is arranged along the circumference of the bottom plate 510 on the outside of the bottom plate 510 and is located outside the bottom end of the maintenance-free bearing 200.
[0042] Among them, the top cover plate 400 is buckled on the top of the maintenance-free bearing 200 to close the top gap of the maintenance-free bearing 200. After the bottom surface of the bottom plate 510 of the bottom protection member 500 fits with the mounting support 100, the inner ring of the bottom plate 510 fits with the side wall of the mounting boss 111. The outer plate 520 is arranged on the outside of the bottom plate 510 to enclose the bottom end of the maintenance-free bearing 200, thereby blocking the gap between the bottom surface of the maintenance-free bearing 200 and the top surface of the mounting support 100. The bottom protection member 500 can block the gap between the maintenance-free bearing 200 and the mounting support 100, thereby preventing sundries such as dust, debris, or grass stems from entering the sprocket 300 structure through the bottom gap of the tensioning sprocket 300 structure, resulting in a failure of the sprocket 300 structure and affecting the operation reliability of the harvester.
[0043] In this embodiment, the outer plate 520 is inclined. The outer plate 520 extends in a direction closer to the sprocket 300, and the bottom end of the maintenance-free bearing 200 is located between the bottom plate 510 and the outer plate 520.
[0044] Specifically, in this embodiment, the outer wall of the bottom end of the maintenance-free bearing 200 has a certain inclination angle. After the bottom surface of the bottom plate 510 is attached to the top surface of the mounting support 100, the top surface of the bottom plate 510 is parallel to the top surface of the maintenance-free bearing 200, and the overall shape of the outer plate 520 and the bottom plate 510 is similar to the shape of the bottom end of the maintenance-free bearing 200. In this structure, the gap between the outer plate 520, the bottom plate 510 and the maintenance-free bearing 200 can be reduced, preventing sundries from entering between the bottom protection member 500 and the maintenance-free bearing 200, and further improving the protection ability of the tensioner sealing mechanism.
[0045] In this embodiment, the bottom protection member 500 further includes an inner plate 530. The inner plate 530 is disposed on the bottom plate 510 along the circumference of the inner hole, and the inner wall of the inner plate 530 is attached to the outer wall of the mounting boss 111.
[0046] The inner plate 530 is disposed vertically and its inner wall is attached to the outer wall of the mounting boss 111. In this structure, after small sundries enter between the maintenance-free bearing 200 and the bottom plate 510, the inner plate 530 can prevent the small sundries from entering the rotating shaft 110 and the maintenance-free bearing 200.
[0047] In this embodiment, the bottom protection member 500 is an integral structure.
[0048] Specifically, the bottom protection member 500 in this embodiment is made by stamping an integral metal material, with a relatively strong overall structure, not easily damaged, and relatively simple processing, making it easy to produce.
[0049] In this embodiment, the maintenance-free bearing 200 has a rotating part 210 and a mounting part 220. The rotating part 210 is disposed outside the mounting part 220. The mounting part 220 is a cylindrical structure and is disposed on the mounting boss 111 and sleeved outside the rotating shaft 110. The rotating part 210 can rotate with the mounting part 220 as the axis. A horizontal limiting member is provided on the rotating shaft 110, and the bottom surface of the horizontal limiting member abuts against the top surface of the mounting part 220. The top cover plate 400 is fastened to the top of the rotating part 210.
[0050] Specifically, an installation groove is provided on the outer wall of the rotating shaft 110, and the distance between the installation groove and the installation boss 111 is the same as the height of the installation part 220. After the maintenance-free bearing 200 is installed on the installation boss 111, the bottom end of the installation part 220 abuts against the installation boss 111. At this time, the horizontal limiting member is inserted into the installation groove, and the bottom surface of the horizontal limiting member abuts against the top surface of the installation part 220. The installation boss 111 and the horizontal limiting member form a vertical limiting structure, which can prevent the maintenance-free bearing 200 from moving in the vertical direction.
[0051] In this embodiment, the bottom end of the top cover plate 400 abuts against the top surface of the horizontal limiting member. The top cover plate 400 and the top opening of the rotating part 210 are in interference fit.
[0052] The rotating part 210 in this embodiment has an installation hole, the installation part 220 is arranged in the installation hole, the height of the installation part 220 is less than the height of the rotating part 210, and the hole pitch of the installation hole is the same as the height of the rotating part 210. In this structure, there is a certain distance between the top hole opening of the installation hole and the top surface of the installation part 220. Specifically, the top cover plate 400 in this embodiment is arranged in the installation hole, the side wall of the top cover plate 400 is in interference fit with the installation hole, and the bottom end of the top cover plate 400 is attached to the top surface of the installation part 220, so as to close the top hole opening of the installation hole and prevent sundries from entering the installation hole through the top hole opening of the installation hole.
[0053] In this embodiment, the top cover plate 400 includes a skeleton and an adhesive layer. The skeleton is in a bowl-shaped structure, and the adhesive layer is arranged outside the skeleton to wrap the skeleton.
[0054] The skeleton is made of metal material, which can provide better support to ensure the structural strength of the top cover plate 400. The adhesive layer wrapped outside the metal skeleton can protect the metal skeleton from breaking. Moreover, the adhesive layer has a certain elasticity, and when the top cover plate 400 is installed in the top hole opening of the installation hole in an interference fit manner, it can deform to facilitate the installation of the top cover plate 400.
[0055] Embodiment Two
[0056] In some tensioner structures, the installation support 100 uses a longer shaft body to carry the bearing and the sprocket 300, refer to Figure 6 . In this structure, a top cover plate 400 similar to the structure of the bottom protection part can be adopted, such as:
[0057] The top cover plate 400 is provided with an avoidance hole. The top cover plate 400 is buckled on the top end of the maintenance-free bearing 200, the rotating shaft 110 is located in the avoidance hole, and the inner wall of the avoidance hole abuts against the side wall of the horizontal limiting member.
[0058] The avoidance hole can provide a space for the rotation shaft 110 to pass through, and the horizontal limiting member in this embodiment extends in the vertical direction. After the inner wall of the avoidance hole abuts against the side wall of the horizontal limiting member, the gap between the rotation shaft 110 and the maintenance-free bearing 200 is sealed.
[0059] Moreover, in this embodiment, a baffle is provided along the circumferential direction of the top cover plate 400 at the edge of the top cover plate 400. The baffle extends downward to abut against the sprocket 300.
[0060] In this embodiment, the top cover plate 400 is buckled on the top of the maintenance-free bearing 200. After the baffle at the edge of the top cover plate 400 extends downward, it can seal the top of the maintenance-free bearing 200 and prevent sundries from entering the maintenance-free bearing 200 between the top cover plate 400 and the top of the maintenance-free bearing 200.
[0061] Embodiment III
[0062] The harvester provided in this embodiment includes the provided tension sprocket sealing structure.
[0063] Specifically, in the tension sprocket sealing structure of this embodiment, the maintenance-free bearing 200 is used as the installation bearing of the tension sprocket 300. The sprocket 300 of the tension sprocket sealing structure is installed on the outside of the maintenance-free bearing 200. The maintenance-free bearing 200 is sleeved outside the rotation shaft 110 and is carried by the installation boss 111. The top cover plate 400 of the tension sprocket sealing structure is buckled on the top of the maintenance-free bearing 200 to seal the top gap of the maintenance-free bearing 200. After the bottom surface of the bottom plate 510 of the bottom protection member 500 of the tension sprocket sealing structure fits with the installation support 100, the inner ring of the bottom plate 510 fits with the side wall of the installation boss 111, and the outer plate 520 is arranged outside the bottom plate 510 to enclose the bottom end of the maintenance-free bearing 200, thereby blocking the gap between the bottom surface of the maintenance-free bearing 200 and the top surface of the installation support 100, and preventing sundries such as dust, debris or grass stems from entering the sprocket 300 structure through the bottom gap of the tension sprocket 300 structure, resulting in a failure of the sprocket 300 structure and affecting the operation reliability of the harvester.
[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. A tensioning sprocket sealing structure, characterized in that: include: Installing a support (100), a maintenance-free bearing (200), a sprocket (300), a top cover plate (400) and a bottom protection member (500); The mounting support (100) is provided with a rotating shaft (110), and the rotating shaft (110) is provided with a mounting boss (111); The maintenance-free bearing (200) has an axial hole, and the maintenance-free bearing (200) is arranged on the mounting boss (111) and is sleeved outside the rotating shaft (110) through the axial hole; The sprocket (300) is arranged outside the maintenance-free bearing (200) to rotate along with the maintenance-free bearing (200); The top cover plate (400) is buckled on the top of the maintenance-free bearing (200) to cover the top of the shaft hole; The bottom protection member (500) comprises a bottom plate (510) and an outer plate (520), the bottom plate (510) being an annular plate, the mounting boss (111) being arranged in the inner hole of the annular plate and the hole wall of the inner hole of the annular plate being in contact with the outer wall of the mounting boss (111), the bottom surface of the bottom plate (510) being in contact with the top surface of the mounting support (100), and the outer plate (520) being arranged on the outer side of the bottom plate (510) along the circumference of the bottom plate (510) and being located on the outer side of the bottom end of the maintenance-free bearing (200).
2. The tension sprocket sealing structure according to claim 1, characterized in that: The outer plate (520) is arranged obliquely; The outer plate (520) extends in a direction close to the sprocket (300), and the bottom end of the maintenance-free bearing (200) is located between the bottom plate (510) and the outer plate (520).
3. The tension sprocket sealing structure according to claim 2, characterized in that: The bottom protection member (500) further includes an inner plate (530); The inner plate (530) is arranged on the bottom plate (510) along the circumference of the inner hole, and the inner wall of the inner plate (530) is in contact with the outer wall of the mounting boss (111).
4. The tension sprocket sealing structure according to any one of claims 1 to 3, characterized in that: The bottom protection member (500) is an integrated structure.
5. The tension sprocket sealing structure according to claim 1, characterized in that: The maintenance-free bearing (200) comprises a rotating part (210) and a mounting part (220); The rotating part (210) is arranged outside the mounting part (220); the mounting part (220) is a cylindrical structure; the mounting part (220) is arranged on the mounting boss (111) and sleeved outside the rotating shaft (110); the rotating part (210) can rotate with the mounting part (220) as an axis; The rotating shaft (110) is provided with a horizontal stopper, and the bottom surface of the horizontal stopper abuts against the top surface of the mounting portion (220); The top cover plate (400) is buckled on the top of the rotating part (210).
6. The tension sprocket sealing structure according to claim 5, characterized in that: The bottom end of the top cover plate (400) abuts against the top surface of the horizontal limiting member; The top cover plate (400) and the top opening of the rotating part (210) are interference fitted.
7. The tension sprocket sealing structure according to claim 6, characterized in that: The top cover plate (400) comprises a frame and a glue layer; The frame is in a bowl-shaped structure, and the adhesive layer is arranged on the outside of the frame to wrap the frame.
8. The tension sprocket sealing structure according to claim 5, characterized in that: The top cover plate (400) has an avoidance hole; The top cover plate (400) is buckled on the top end of the maintenance-free bearing (200), the rotating shaft (110) is located in the avoidance hole, and the inner wall of the avoidance hole is in contact with the side wall of the horizontal limiter.
9. The tension sprocket sealing structure according to claim 8, characterized in that: The edge of the top cover plate (400) is provided with a baffle along the circumference of the top cover plate (400); The baffle plate extends downward to abut against the sprocket (300).
10. A harvester, characterized in that: The invention comprises the tensioning sprocket sealing structure as claimed in any one of claims 1 to 9.