Rear transmission case steering structure of mini-tiller and transmission case

Abstract

The utility model relates to the technical field of farming machinery in the farming industry, in particular to a steering structure of a rear transmission case of a mini-tiller and the transmission case. The steering structure comprises a rear transmission box, and the rear transmission box comprises an upper box body, a lower box body and a transmission assembly. Wherein the upper box body communicates with the lower box body, the communicating position of the upper box body and the lower box body is in running fit, the transmission assembly is arranged in the upper box body, and the output end of the transmission assembly penetrates through the communicating position of the upper box body and the lower box body and extends into the lower box body. When the steering structure steers, the lower box body is rotated, so that the lower box body rotates relative to the upper box body, the lower box body drives a rear wheel of the mini-tiller to deflect, and the steering action of the mini-tiller is completed. When the upper box body and the lower box body rotate relatively, transmission of the transmission assembly is not affected, and therefore the relative independence of the steering action and the transmission of the transmission assembly is guaranteed. The output end of the power device of the mini-tiller can be directly connected with the input end of the transmission assembly, a universal coupling is not needed for transmission, the structure is simpler, and stability is better.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural tillage machinery, in particular to a steering structure of a rear transmission box of a micro-tillage machine and a transmission box. Background Art

[0002] The micro-tillage machine is a commonly used tillage tool in the field of agricultural equipment. The use of the micro-tillage machine has greatly improved the production efficiency of agricultural production, so the use of the micro-tillage machine is becoming more and more widespread.

[0003] Traditional riding micro-tillers include a power unit and a rear transmission box. The power unit is located at the front of the micro-tiller. The power output shaft of the power unit is connected to the input shaft of the rear transmission box, and the power is transmitted to the rear wheel through the rear transmission box, thereby driving the rear wheel to rotate. In order to achieve in-situ steering, traditional riding micro-tillers mostly use a frame that flexes to turn. Specifically, the front and rear sections of the frame are hinged by an intermediate pin shaft, and the rear transmission box is fixedly connected to the rear section of the frame. The rear section of the frame is pulled to swing by a pull rod hinged to the rear section of the frame, thereby achieving the function of flexing to turn. Due to the need for flexing to turn, a universal coupling needs to be installed between the output end of the power unit and the rear transmission box for transmission. This transmission structure is relatively complex, has poor working stability, and the universal coupling is easily damaged during use. Utility Model Content

[0004] In view of the above-mentioned defects, the technical problem to be solved by the present invention is to provide a steering structure and a transmission box of the rear transmission box of a micro-tiller. The steering structure does not require the use of a universal joint for transmission and has stronger working stability.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions:

[0006] On the one hand, the utility model provides a steering structure of a rear transmission box of a micro-tiller, including a rear transmission box, wherein the rear transmission box includes an upper box body, a lower box body and a transmission assembly, the upper box body is connected to the lower box body, and the connection between the upper box body and the lower box body is rotatably matched, the transmission assembly is arranged in the upper box body, and the output end of the transmission assembly passes through the connection between the upper box body and the lower box body and extends into the lower box body.

[0007] By adopting the above solution, when in use, the output end of the power unit is connected to the input end of the transmission assembly, and the axle of the rear wheel of the micro-tiller is rotatably mounted on the lower box body, and the axle is driven to rotate by the output end of the transmission assembly. When turning, the lower box body is rotated so that the lower box body rotates relative to the upper box body, and the lower box body drives the axle and the rear wheel to deflect together, thereby completing the turning action of the micro-tiller. The output end of the transmission assembly passes through the connection between the upper box body and the lower box body. When the upper box body and the lower box body rotate relative to each other, the transmission of the transmission assembly will not be affected, thereby ensuring the relative independence of the steering action and the transmission of the transmission assembly. The output end of the power unit of the micro-tiller can be directly connected to the input end of the transmission assembly, without the need for a universal joint transmission, the structure is simpler and the stability is better.

[0008] The utility model is further configured such that a transmission member is fixed outside the lower box body, and the lower box body can be conveniently pulled to rotate by the transmission member.

[0009] The utility model is further configured such that a push-pull handle is provided on the outside of the transmission member, and the push-pull handle is eccentrically arranged relative to the rotation axis of the transmission member. The eccentrically arranged push-pull handle can facilitate pulling the transmission member to rotate, and the rotation is more labor-saving.

[0010] The present invention is further configured such that the upper housing includes a first housing and a second housing, the sides of the first housing and the second housing are connected, the transmission assembly is disposed in the second housing, the input end of the transmission assembly passes through the connection between the second housing and the first housing and extends into the first housing, the bottom of the second housing is connected to the top of the lower housing, the connection between the second housing and the lower housing is provided with an annular first connecting portion, the connection between the lower housing and the second housing is provided with an annular second connecting portion, the first connecting portion and the second connecting portion are rotatably engaged. The relative rotational transmission between the second housing and the lower housing is stabilized by the rotatable engagement of the first connecting portion and the second connecting portion, and the first housing can be conveniently connected to the frame of the micro-tiller through the first housing.

[0011] The utility model is further configured such that the transmission assembly includes an input shaft and an output shaft rotatably disposed within a second housing, the input shaft being disposed transversely, the output shaft being disposed vertically, one end of the output shaft passing through the connection between the transmission case and the lower housing and extending into the lower housing, the output shaft rotatably engaging with a first connecting portion, and adjacent ends of the input shaft and the output shaft being fixed with bevel gears, the two bevel gears being meshed and connected. The input shaft is disposed transversely, the output shaft being disposed vertically, and the output end of the power unit located at the front of the micro-tiller being transmitted transversely to the input shaft. Because the output shaft rotatably engages with the first connecting portion, the structure of the first connecting portion is utilized as a constraint on the output shaft, the output shaft and the first connecting portion can remain coaxial, and the overall structure is more reasonable.

[0012] The present invention is further configured such that a first mounting opening is formed on the top of the second housing, and an end cover is detachably connected to the first mounting opening of the second housing. The transmission assembly in the second housing can be easily installed or removed by removing the end cover.

[0013] The utility model further provides that the transmission member includes a fixed plate, one side of which is provided with an escape notch for the passage of the second housing, the fixed plate being fixedly connected to the top of the lower housing, the fixed plate being fixedly connected to a plurality of connecting plates, the upper sections of which are bent inward, the free ends of all of the connecting plates being fixedly connected to a fixing ring, and the top of the second housing rotatingly engaging with the fixing ring. Due to the rotational engagement of the top of the second housing with the fixing ring, the fixing ring constrains the second housing, and the fixing ring on the lower housing and the transmission member sandwich the second housing, thereby further stabilizing the rotational engagement between the upper and lower housings.

[0014] The utility model is further configured such that the outer edge of the top of the lower box body is provided with a wing plate, and the wing plate is detachably connected to the fixing plate, so as to facilitate the connection between the fixing plate and the lower box body.

[0015] The present invention further provides a configuration in which a protrusion is provided on the top of the end cap, the protrusion being located inside the retaining ring and rotatably engaged with the retaining ring. During rotation, the top of the second housing rotates with the protrusion on the top of the end cap via the retaining ring of the transmission member, while the bottom of the second housing rotates with the lower housing. This constrains the upper and lower ends of the second housing, ensuring the stability of the rotational engagement between the second housing and the lower housing.

[0016] On the other hand, the present invention further provides a transmission box, comprising the steering structure of the rear transmission box of a micro-tiller as described in any one of the above items.

[0017] In summary, the present invention provides a micro-tillage machine rear transmission box steering structure having at least the following

[0018] Beneficial effects:

[0019] 1. The output end of the micro-tiller's power device can be directly connected to the input end of the transmission component. The steering function of the micro-tiller can be met without the help of a universal coupling, and the overall stability is better.

[0020] 2. The relative rotation between the upper box and the lower box and the transmission of the transmission components are independent of each other and will not affect each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without expending any novel work.

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0023] Figure 2 It is an exploded view of the utility model;

[0024] Figure 3 It is a left view of the utility model;

[0025] Figure 4 yes Figure 3 Cross-sectional view at AA in the middle;

[0026] Figure 5 It is a three-dimensional structural diagram of the transmission assembly and the wheel axle in the utility model;

[0027] Figure 6 It is a schematic diagram of the three-dimensional structure of the upper box body of the utility model when looking up.

[0028] The reference numerals include: upper box body 1, first box body 101, second box body 102, first connecting part 103, first mounting port 104, second mounting port 105, end cover 106, protrusion 107, lower box body 2, transmission assembly 3, input shaft 301, output shaft 302, bevel gear 303, transmission member 4, fixing plate 401, connecting plate 402, fixing ring 403, reinforcing rib 404, push-pull handle 5, second connecting part 6, wing plate 7, and axle 8. DETAILED DESCRIPTION

[0029] In order to make those skilled in the art better understand the technical solution of the utility model, Figure 1-6 The present invention is further described in detail with reference to the following specific embodiments.

[0030] See also Figure 1-6 The present embodiment provides a steering structure of a rear transmission box of a micro-tiller, including a rear transmission box, which includes an upper box body 1, a lower box body 2 and a transmission assembly 3. The upper box body 1 is connected to the lower box body 2, and the connection between the upper box body 1 and the lower box body 2 is rotatably matched. The transmission assembly 3 is arranged in the upper box body 1, and the output end of the transmission assembly 3 passes through the connection between the upper box body 1 and the lower box body 2 and extends into the lower box body 2.

[0031] When in use, the output end of the power unit is connected to the input end of the transmission assembly 3, and the axle 8 of the rear wheel of the micro-tiller is rotatably mounted on the lower housing 2, and the axle 8 is driven to rotate by the output end of the transmission assembly 3. When turning, the lower housing 2 is rotated so that the lower housing 2 rotates relative to the upper housing 1, and the lower housing 2 drives the axle 8 and the rear wheel to deflect together, thereby completing the turning action of the micro-tiller. The output end of the transmission assembly 3 passes through the connection between the upper housing 1 and the lower housing 2. When the upper housing 1 and the lower housing 2 rotate relative to each other, the transmission of the transmission assembly 3 will not be affected, thereby ensuring the relative independence of the steering action and the transmission of the transmission assembly 3. The output end of the power unit of the micro-tiller can be directly connected to the input end of the transmission assembly 3, without the need for a universal joint transmission, and the structure is simpler and the stability is better.

[0032] In order to facilitate the rotation of the lower box body 2, a transmission member 4 is fixed to the outside of the lower box body 2, and a push-pull handle 5 is provided on the outside of the transmission member 4. The push-pull handle 5 is eccentrically arranged relative to the rotation axis of the transmission member 4. In specific use, a pull rod is hinged to the free end of the push-pull handle 5, and the push-pull handle 5 is pulled by the pull rod, thereby driving the lower box body 2 to rotate through the transmission member 4 to complete the steering.

[0033] In some embodiments, specifically, the upper housing 1 includes a first housing 101 and a second housing 102, the sides of which are connected. The second housing 102 is located on the right side of the first housing 101, and the left side of the second housing 102 is connected to the right side of the first housing 101. The transmission assembly 3 is disposed within the second housing 102, and the input end of the transmission assembly 3 passes through the connection between the second housing 102 and the first housing 101 and extends into the first housing 101. The bottom of the second housing 102 is connected to the top of the lower housing 2, and the connection between the second housing 102 and the lower housing 2 is provided with an annular first connecting portion 103. The connection between the lower housing 2 and the second housing 102 is provided with an annular second connecting portion 6, and the first connecting portion 103 and the second connecting portion 6 are rotatably engaged. Preferably, the first connecting portion 103 is located inside the second connecting portion 6, and the first connecting portion 103 and the second connecting portion 6 are connected by a first bearing.

[0034] In some embodiments, specifically, the transmission assembly 3 includes an input shaft 301 and an output shaft 302 that are rotatably arranged in the second housing 102, the input shaft 301 being arranged horizontally, and the output shaft 302 being arranged vertically. One end of the output shaft 302 passes through the connection between the transmission box and the lower housing 2 and extends into the lower housing 2, and the output shaft 302 is rotatably engaged with the first connecting portion 103. The output shaft 302 is located in the first connecting portion 103, and the output shaft 302 and the first connecting portion 103 are connected by a second bearing. The adjacent ends of the input shaft 301 and the output shaft 302 are both fixed with bevel gears 303, and the two bevel gears 303 are meshed and connected. When in use, the lower section of the lower housing 2 is rotatably connected to the axle 8, which is used to connect the rear wheel of the micro-tiller, and the lower end of the output shaft 302 is transmission-connected to the axle 8.

[0035] A second mounting opening 105 corresponding to the input shaft 301 is provided on the left side of the first housing 101 . When in use, the output end of the power device of the micro-tillage machine can be connected to the input shaft 301 of the transmission assembly 3 through the second mounting opening 105 .

[0036] In order to facilitate the installation and maintenance of the transmission assembly 3 in the second box body 102, a first installation opening 104 is further provided on the top of the second box body 102. An end cover 106 is detachably connected to the first installation opening 104 of the second box body 102. The end cover 106 can be specifically connected to the top of the second box body 102 by bolts.

[0037] In some embodiments, the transmission member 4 includes a fixed plate 401, one side of which is provided with a clearance notch for the second housing 102 to pass through. The fixed plate 401 is fixedly connected to the top of the lower housing 2. The clearance notch opens to the right of the first housing 101, and a gap is formed between the inner side of the clearance notch and the outer wall of the second transmission housing. The gap is sized to ensure that the transmission member 4 does not interfere with the inner side of the second housing 102 when the fixed plate 401 rotates. A plurality of connecting plates 402 are fixedly connected to the upper side of the fixed plate 401. The upper sections of the connecting plates 402 are bent inwardly. The free ends of all the connecting plates 402 are fixedly connected to a fixing ring 403, and the top of the second housing 102 rotates in conjunction with the fixing ring 403. In this embodiment, a connecting plate 402 is preferably provided on the fixed plate 401 near the front end, the right end, and the rear end, for a total of three connecting plates 402. The upper sections of the three connecting plates 402 are bent inwardly and connected to the same fixing ring 403. In order to improve overall stability, reinforcing ribs 404 are provided between adjacent connecting plates 402 .

[0038] In order to facilitate the connection between the lower box body 2 and the fixed plate 401, a wing plate 7 is further provided on the outer edge of the top of the lower box body 2. The wing plate 7 and the fixed plate 401 are detachably connected, specifically by bolts.

[0039] In some embodiments, a convex portion 107 is provided on the top of the end cap 106. The convex portion 107 is located inside the fixing ring 403 and rotates with the fixing ring. Preferably, the convex portion 107 is connected to the fixing ring 403 via a third bearing.

[0040] Based on the same inventive concept, the present invention also provides a transmission box, which includes the above-mentioned steering structure of the rear transmission box of the micro-tiller.

[0041] It should be noted that the words indicating direction in this article, such as up and down, are all based on Figure 1 The setting of the direction is only for the convenience of description and has no other specific meaning.

[0042] It should also be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such article or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the article or device comprising the aforementioned elements.

[0043] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help you understand the core concept of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A rear transmission box steering structure for a micro-tiller, comprising a rear transmission box, characterized in that: The rear transmission box comprises an upper box body (1), a lower box body (2) and a transmission assembly (3); the upper box body (1) is connected to the lower box body (2); the connection point between the upper box body (1) and the lower box body (2) is rotatably matched; the transmission assembly (3) is arranged in the upper box body (1); the output end of the transmission assembly (3) passes through the connection point between the upper box body (1) and the lower box body (2) and extends into the lower box body (2).

2. A steering structure for a rear transmission box of a micro-tillage machine as claimed in claim 1, characterized in that: A transmission member (4) is fixed outside the lower box body (2).

3. A steering structure for a rear transmission box of a micro-tillage machine as claimed in claim 2, characterized in that: A push-pull handle (5) is provided on the outside of the transmission member (4), and the push-pull handle (5) is eccentrically arranged relative to the rotation axis of the transmission member (4).

4. A steering structure for a rear transmission box of a micro-tillage machine as claimed in claim 2 or 3, characterized in that: The upper box (1) comprises a first box (101) and a second box (102), the sides of the first box (101) and the second box (102) are connected, the transmission assembly (3) is arranged in the second box (102), the input end of the transmission assembly (3) passes through the connection between the second box (102) and the first box (101) and extends into the first box (101), the bottom of the second box (102) is connected with the top of the lower box (2), the connection between the second box (102) and the lower box (2) is provided with an annular first connecting portion (103), the connection between the lower box (2) and the second box (102) is provided with an annular second connecting portion (6), and the first connecting portion (103) and the second connecting portion (6) are rotatably matched.

5. The rear transmission box steering structure of a micro-tillage machine as claimed in claim 4, characterized in that: The transmission assembly (3) comprises an input shaft (301) and an output shaft (302) rotatably arranged in the second housing (102); the input shaft (301) is arranged horizontally, and the output shaft (302) is arranged vertically; one end of the output shaft (302) passes through the connection between the transmission box and the lower housing (2) and extends into the lower housing (2); the output shaft (302) is rotatably engaged with the first connecting portion (103); adjacent ends of the input shaft (301) and the output shaft (302) are both fixed with bevel gears (303), and the two bevel gears (303) are meshed and connected.

6. The rear transmission box steering structure of a micro-tillage machine as claimed in claim 4, characterized in that: A first installation opening (104) is provided on the top of the second box body (102), and an end cover (106) is detachably connected to the first installation opening (104) of the second box body (102).

7. A steering structure for a rear transmission box of a micro-tillage machine as claimed in claim 6, characterized in that: The transmission member (4) comprises a fixed plate (401), one side of which is provided with an avoidance notch for the second box body (102) to pass through, the fixed plate (401) being fixedly connected to the top of the lower box body (2), a plurality of connecting plates (402) being fixedly connected to the fixed plate (401), the upper section of the connecting plate (402) being bent inward, the free ends of all the connecting plates (402) being fixedly connected to a fixing ring (403), and the top of the second box body (102) being rotatably matched with the fixing ring (403).

8. The rear transmission box steering structure of a micro-tillage machine as claimed in claim 7, characterized in that: A wing plate (7) is provided on the outer edge of the top of the lower box body (2), and the wing plate (7) is detachably connected to the fixing plate (401).

9. A steering structure for a rear transmission box of a micro-tillage machine as claimed in claim 7 or 8, characterized in that: A convex portion (107) is provided on the top of the end cover (106), and the convex portion (107) is located inside the fixing ring (403) and is rotatably matched with the fixing ring (403).

10. A transmission box, characterized in that: It comprises a steering structure of a rear transmission box of a micro-tiller as described in any one of claims 1-9.

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