Connecting structure for front frame and rear frame of riding type mini-tiller

Abstract

The utility model discloses a connecting structure for a front frame and a rear frame of a riding type mini-tiller, which comprises a connecting support plate connected with the front frame, a connecting shaft, a first support plate and a second support plate, the first support plate and the second support plate are connected with the rear frame, and the first support plate and the second support plate are parallel to each other and are respectively provided with a first shaft hole and a second shaft hole which are coaxially aligned; a third shaft hole is formed in the connecting supporting plate, the connecting supporting plate is located between the first supporting plate and the second supporting plate, and the connecting shaft penetrates through the first shaft hole, the second shaft hole and the third shaft hole. By the adoption of the structure, the risk that the connecting shaft inclines can be reduced, the stability and reliability of the whole connecting structure are improved, meanwhile, abrasion of related parts can be reduced, the service life is prolonged, and high practicability is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of micro-tillage machines, in particular to a connection structure between a front frame and a rear frame of a riding micro-tillage machine. Background Art

[0002] A ride-on tiller is a tiller that can be operated while sitting on a seat. It combines the flexibility of a traditional tiller with the comfort of a ride-on tiller and is widely used in agricultural production.

[0003] The connection structure between the front frame and the rear frame of the current riding micro-tillage machine is as shown in the attached figure. Figure 7 As shown, after the connecting support plates of the front and rear frames of the micro-tiller are superimposed on each other, the connection is achieved by using a connecting shaft that passes through the bearings of the two connecting support plates in sequence. In this structure, since the connecting shaft and the connecting support plates on both sides are subjected to force in opposite directions and are located on both sides of the center line of the connecting shaft, the connecting shaft will be subjected to a large bending moment, especially in the middle area of ​​the connecting shaft, which will more easily cause the shaft to bend, deform, or skew. If the connecting shaft is bent, deformed, or skewed, it will not only aggravate the local wear of the force points between the connecting shaft and the two connecting support plates, but also cause the axis of the connecting shaft and the bearing to deviate, increase the asymmetric load on the bearing, accelerate bearing wear and shorten its service life, and affect the stability and reliability of the overall connection structure. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a connection structure between the front frame and the rear frame of a ride-on micro-tillage machine, so as to solve the problem of poor connection stability of the connection structure between the front frame and the rear frame of the current ride-on micro-tillage machine.

[0005] The technical solutions adopted in this utility model are as follows:

[0006] A connection structure between a front frame and a rear frame of a riding micro-tiller includes a connecting support plate connected to the front frame, a connecting shaft, a first support plate and a second support plate connected to the rear frame, the first support plate and the second support plate are parallel to each other and respectively provided with a first shaft hole and a second shaft hole aligned with the same axis, a third shaft hole is provided on the connecting support plate, the connecting support plate is located between the first support plate and the second support plate, and the connecting shaft is passed through the first shaft hole, the second shaft hole and the third shaft hole.

[0007] Compared with the existing technology, the principle and beneficial effects of this utility model are:

[0008] In this solution, the connecting support plate is arranged between the first support plate and the second support plate, and the connecting shaft is passed through the shaft holes on the first support plate, the second support plate and the connecting support plate. Since the connecting support plate is located between the first support plate and the second support plate, the force point of the connecting shaft and the connecting support plate can be used as the force center point of the connecting shaft. The force applied to the connecting shaft by the connecting support plate at the center point will not generate a bending moment on the connecting shaft, while the force points of the connecting shaft and the first support plate and the second support plate are distributed on both sides of the center point. Among them, since the first support plate and the second support plate are both connected to the rear frame, the force points of the connecting shaft and the first support plate and the second support plate are located on the same side and have the same force direction. The bending moments generated by the two can offset each other, thereby reducing the risk of the connecting shaft being skewed, thereby improving the stability of the connection. Therefore, through this setting, the present solution can reduce the bending moment on the connecting shaft, reduce the risk of the shaft being skewed, make the rotation of the connecting shaft more stable, and also reduce the wear of related components and improve the service life.

[0009] As a preferred embodiment of the present invention, the first support plate and the second support plate rotate synchronously with the connecting shaft.

[0010] Beneficial effects:

[0011] In this solution, by setting the first support plate and the second support plate to rotate synchronously with the connecting shaft, wear between the connecting shaft and the first support plate and the second support plate can be avoided. Since the rotation process between the shaft and the plate is a contact-type relative motion, long-term friction can easily cause damage to the contact surface. Through this setting, this solution can avoid the first support plate and the second support plate from relative motion with the connecting shaft, thereby effectively avoiding wear.

[0012] As a preferred embodiment of the present invention, a first shaft sleeve is provided in the first shaft hole, a flat groove is provided on the top of the first shaft sleeve, the connecting shaft is passed through the first shaft sleeve, and a flat square is provided on the top of the connecting shaft to match the flat groove.

[0013] Beneficial effects:

[0014] In this solution, when the flat groove and the flat square are matched, the flat end surfaces of the two are in contact with each other. Therefore, when rotating, the first shaft sleeve is set to move synchronously with the connecting shaft. Since the first shaft sleeve is arranged in the first shaft hole of the first support plate, the first support plate and the related structures connected to the first support plate all move synchronously with the connecting shaft. This solution adopts the flat groove and the flat square to match, the structure is simple, and it is conducive to reducing manufacturing costs.

[0015] As a preferred embodiment of the present invention, the connecting support plate, connecting shaft, first support plate and second support plate are connected to each other to form a group of connecting components, and two groups of mutually symmetrical connecting components are arranged between the front frame and the rear frame.

[0016] Beneficial effects:

[0017] In this solution, by providing two sets of connection components between the front frame and the rear frame, the connection can be made stronger and the rotation more stable.

[0018] As a preferred embodiment of the present invention, a lubrication structure is provided between the connecting shaft and the connecting support plate.

[0019] Beneficial effects:

[0020] In this solution, a lubrication structure is provided between the connecting shaft and the connecting support plate, so that the relative rotation between the two can be smoother, thereby reducing the wear between the two and extending the service life of the components.

[0021] As a preferred embodiment of the present invention, a second sleeve is provided in the third shaft hole, the middle part of the connecting shaft is passed through the second sleeve, the lubrication structure includes an oil inlet hole opened at the top of the connecting shaft, an annular groove is provided on the outer wall of the middle part of the connecting shaft, and a connecting hole is provided between the oil inlet hole and the annular groove to connect the two.

[0022] Beneficial effects:

[0023] In this solution, the lubricating oil enters from the oil inlet hole and flows into the annular groove from the connecting hole. The lubricating oil in the annular groove contacts the inner wall of the second sleeve to achieve lubrication. This solution adopts this structure to achieve full contact between the lubricating oil and the rotating contact surface. Compared with the traditional method of applying a large amount of lubricating oil to the outside, it not only has a better lubrication effect, but also can reduce the waste of lubricating oil.

[0024] As a preferred embodiment of the present invention, the inner side wall of the second sleeve is provided with an oil guide groove connected to the annular groove.

[0025] Beneficial effects:

[0026] By providing an oil guide groove, this solution can guide the lubricating oil in the annular groove to various positions on the inner side wall of the second sleeve, making the lubrication area more comprehensive and helping to improve the lubrication effect.

[0027] As a preferred embodiment of the present invention, the oil guide groove is spiral.

[0028] Beneficial effects:

[0029] In this solution, the oil guide groove is spiral-shaped. The spiral oil guide groove has a longer path and a wider extension area on the inner wall of the second sleeve, which helps to improve the lubrication effect. At the same time, the spiral structure has a gentler slope, which can increase the residence time of the lubricating oil on the inner wall, improve the utilization rate of the lubricating oil, and further improve the lubrication effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic structural diagram of an embodiment of the utility model applied to a ride-on micro-tillage machine;

[0031] Figure 2 It is a structural schematic diagram of an embodiment of the utility model;

[0032] Figure 3 This is a schematic structural diagram of the protective cover in an embodiment of the present utility model;

[0033] Figure 4 This is a structural diagram of the front frame connecting support plate in an embodiment of the present utility model;

[0034] Figure 5 This is a schematic structural diagram of the connecting shaft in an embodiment of the present utility model;

[0035] Figure 6 It is a side view of an embodiment of the utility model;

[0036] Figure 7 The utility model is a side view of the connection structure of the front frame and the rear frame of the existing micro-tillage machine.

[0037] Reference numerals include:

[0038] Rear frame 1, first support plate 11, first shaft sleeve 111, flat groove 112, second support plate 12, connecting support plate 2, second shaft sleeve 21, oil guide groove 211, connecting shaft 3, oil inlet hole 31, annular groove 32, connecting hole 33, flat square 34. DETAILED DESCRIPTION

[0039] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various variations in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially for illustrative purposes and are not intended to limit the present invention.

[0040] In the description of this application, the terms "top", "bottom", "one end", "one side", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the structure referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application.

[0041] See also Figure 1 and Figure 2As shown, this embodiment discloses a connection structure between the front frame and the rear frame of a riding micro-tiller, including a connecting shaft 3, a connecting support plate 2 fixed to the front frame, a first support plate 11 and a second support plate 12 fixed to the rear frame 1, the first support plate 11, the second support plate 12, the connecting support plate 2 and the connecting shaft 3 cooperate with each other to form a group of connecting components, and two groups of mutually symmetrical connecting components are provided between the front frame and the rear frame 1, and are respectively located on the upper side and the lower side of the connection position to form a stable connection as a whole.

[0042] For details, see Figure 2-4 as well as Figure 6 As shown, the first support plate 11 and the second support plate 12 are parallel to each other and are respectively provided with a first shaft hole and a second shaft hole aligned with the same axis. The connecting support plate 2 is provided with a third shaft hole. The connecting support plate 2 is located between the first support plate 11 and the second support plate 12. The first shaft hole and the second shaft hole are respectively fixed with a first shaft sleeve 111 and a third shaft sleeve. The third shaft hole is fixed with a second shaft sleeve 21. The connecting shaft 3 is sequentially passed through the first shaft sleeve 111, the second shaft sleeve 21 and the third shaft sleeve. 1 is milled with a flat groove 112 on the top, and a flat square 34 is integrally formed on the top of the connecting shaft 3 to cooperate with the flat groove 112. When the connecting shaft 3 is inserted into the first shaft sleeve 111, the flat groove 112 cooperates with the flat square 34, and the flat end surfaces of the two are in contact. At this time, the first support plate 11 and the related structure connected to the first support plate 11 all move synchronously with the connecting shaft 3. Because the second support plate 12 and the first support plate 11 are both fixed to the rear frame 1, the first support plate 11 and the second support plate 12 both rotate synchronously with the connecting shaft 3. By configuring the first support plate 11 and the second support plate 12 to rotate synchronously with the connecting shaft 3, wear between the connecting shaft 3 and the first support plate 11 and the second support plate 12 can be effectively avoided, which is conducive to improving service life.

[0043] In this embodiment, since the connecting support plate 2 is arranged between the first support plate 11 and the second support plate 12, the force points of the connecting shaft 3 and the connecting support plate 2 can be used as the force center point of the connecting shaft 3. The force applied by the connecting support plate 2 at the center point to the connecting shaft 3 will not generate a bending moment on the connecting shaft 3, while the force points of the connecting shaft 3 and the first support plate 11 and the second support plate 12 are distributed on both sides of the center point. Among them, since the first support plate 11 and the second support plate 12 are both connected to the rear frame 1, the force points of the connecting shaft 3 and the first support plate 11 and the second support plate 12 are located on the same side and have the same force direction. The bending moments generated by the two can offset each other, thereby reducing the risk of the connecting shaft 3 being skewed, making the rotation of the connecting shaft 3 more stable, which is beneficial to improving the stability and reliability of the overall connection structure, while also reducing the wear of related components and increasing their service life.

[0044] Furthermore, a lubrication structure is provided between the connecting shaft 3 and the connecting support plate 2. For details, see Figure 4 and Figure 5As shown, the lubrication structure includes an oil inlet hole 31 formed at the top of the connecting shaft 3, an annular groove 32 provided on the outer wall of the middle portion of the connecting shaft 3, a connecting hole 33 provided between the oil inlet hole 31 and the annular groove 32, and an oil guide groove 211 provided on the inner wall of the second sleeve 21 to communicate with the annular groove 32. During use, lubricating oil is injected from the oil inlet hole 31, and then flows from the connecting hole 33 into the annular groove 32. The lubricating oil in the annular groove 32 contacts the inner wall of the second sleeve 21, achieving lubrication. At the same time, due to the provision of the oil guide groove 211, the lubricating oil in the annular groove 32 will also be guided along the oil guide groove 211 to different positions on the inner wall of the second sleeve 21, making the lubrication area more comprehensive and helping to improve the lubrication effect. Furthermore, in this embodiment, the oil guide groove 211 is set to be spiral. This setting can not only increase the path of the oil guide groove 211, so that the contact area of ​​the lubricating oil on the inner wall of the second sleeve 21 is wider, but also the spiral structure has a gentler slope, which can increase the residence time of the lubricating oil on the inner wall, improve the utilization rate of the lubricating oil, and further improve the lubrication effect.

[0045] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. A connecting structure for a front frame and a rear frame of a riding micro-tillage machine, comprising a connecting support plate connected to the front frame, characterized in that: It also includes a connecting shaft, a first support plate and a second support plate connected to the rear frame, the first support plate and the second support plate are parallel to each other and respectively provided with a first axial hole and a second axial hole aligned with the same axis, a third axial hole is provided on the connecting support plate, the connecting support plate is located between the first support plate and the second support plate, and the connecting shaft is passed through the first axial hole, the second axial hole and the third axial hole.

2. The connection structure between the front frame and the rear frame of the riding micro-tillage machine according to claim 1 is characterized in that: The first support plate and the second support plate rotate synchronously with the connecting shaft.

3. The connection structure between the front frame and the rear frame of the riding micro-tillage machine according to claim 2, characterized in that: A first shaft sleeve is provided in the first shaft hole, a flat groove is provided on the top of the first shaft sleeve, the connecting shaft is passed through the first shaft sleeve, and a flat square is provided on the top of the connecting shaft to match the flat groove.

4. The connection structure between the front frame and the rear frame of the riding micro-tillage machine according to claim 3, characterized in that: The connecting support plate, the connecting shaft, the first support plate and the second support plate are connected to each other to form a set of connecting components. Two sets of mutually symmetrical connecting components are arranged between the front frame and the rear frame.

5. The connection structure between the front frame and the rear frame of the riding micro-tillage machine according to claim 1 is characterized in that: A lubrication structure is provided between the connecting shaft and the connecting support plate.

6. The connection structure between the front frame and the rear frame of the riding micro-tillage machine according to claim 5, characterized in that: A second sleeve is provided in the third shaft hole, and the middle part of the connecting shaft is passed through the second sleeve. The lubrication structure includes an oil inlet hole opened at the top of the connecting shaft, an annular groove is provided on the outer wall of the middle part of the connecting shaft, and a connecting hole is provided between the oil inlet hole and the annular groove to connect the two.

7. The connection structure between the front frame and the rear frame of the riding micro-tillage machine according to claim 6, characterized in that: The inner side wall of the second sleeve is provided with an oil guide groove communicated with the annular groove.

8. The connection structure between the front frame and the rear frame of the riding micro-tillage machine according to claim 7, characterized in that: The oil guide groove is spiral-shaped.

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