Frame connecting structure of riding type mini-tiller

Abstract

The utility model discloses a frame connecting structure of a riding type mini-tiller, which comprises a transmission case, a steering mechanism, a front gearbox, a rear gearbox, a front rack and a rear rack, the transmission case is fixedly arranged on the front gearbox, the steering mechanism is arranged between the transmission case and the rear gearbox, one end of the steering mechanism is connected with an output shaft of the transmission case, and the other end of the steering mechanism is connected with the rear gearbox. The other end is connected with a transmission mechanism in the rear gearbox; the machine is characterized in that the front machine frame is fixedly installed on the transmission case, the rear machine frame is fixedly installed on the rear gearbox, and the front machine frame and the rear machine frame are rotationally connected through a first pin shaft; a front box rear bracket is fixedly installed on the side, facing the rear gearbox, of the front gearbox, a rear box front bracket is fixedly installed on the side, facing the front gearbox, of the rear gearbox, the front box rear bracket and the rear box front bracket are rotationally connected through a second pin shaft, and the axis of the second pin shaft is overlapped with the axis of the first pin shaft.

Description

TECHNICAL FIELD

[0001] The utility model relates to micro tiller technical field, concretely relates to a car frame connecting structure of riding type micro tiller. BACKGROUND

[0002] At present, micro tillers on the market are mainly divided into two kinds, one is hand-held micro tiller, and the other is riding type micro tiller. Specifically, the hand-held micro tiller needs to be pushed by a person behind the micro tiller for operation, which is labor-intensive and low in operation efficiency; the riding type micro tiller has a seat for the operator to sit on the micro tiller seat, and moves and operates the micro tiller through the operation lever and the foot pedal, which has the advantages of low labor intensity and high work efficiency. Therefore, the riding type micro tiller has good popularization and application prospect.

[0003] The existing riding type micro tiller has a transmission mechanism mainly comprising a front gearbox and a rear gearbox connected in transmission, a front frame is fixedly installed on the front gearbox, a rear frame is fixedly connected to the rear gearbox, the front frame and the rear frame are rotationally connected through a rotating shaft, and the rear frame is driven through a steering assembly between the front frame and the rear frame, so as to realize the bending swing of the rear frame relative to the front frame. In the above transmission mechanism, the bending swing is realized only by the rotational connection between the front frame and the rear frame, and the rear side is not stable during the swing. In addition, the rotation is connected only by one rotating shaft, which is seriously worn after long-time use and has short service life. SUMMARY

[0004] In view of the above problems in the prior art, the utility model aims to provide a car frame connecting structure of a riding type micro tiller, which solves the problems of unstable structure and short service life of the existing riding type micro tiller.

[0005] In order to solve the above technical problems, the utility model adopts the following technical scheme:

[0006] The frame connecting structure of the riding type mini-cultivator comprises a transmission case, a steering mechanism, a front gearbox, a rear gearbox, a front frame and a rear frame, the transmission case is fixedly installed on the front gearbox, the steering mechanism is arranged between the transmission case and the rear gearbox, one end of the steering mechanism is connected with the output shaft of the transmission case, and the other end of the steering mechanism is connected with the transmission mechanism in the rear gearbox; the front frame is fixedly installed on the transmission case, the rear frame is fixedly installed on the rear gearbox, and the front frame is rotatably connected with the rear frame through a first pin shaft; a front case rear bracket is fixedly installed on the side of the front gearbox facing the rear gearbox, and a rear case front bracket is fixedly installed on the side of the rear gearbox facing the front gearbox; the front case rear bracket is rotatably connected with the rear case front bracket through a second pin shaft, and the axis of the second pin shaft overlaps the axis of the first pin shaft. In this way, the transmission case is fixedly installed on the front gearbox, the upper part of the front end and the rear end of the mini-cultivator is rotatably connected through the upper frame and the lower frame, and the lower part of the front end and the rear end of the mini-cultivator is rotatably connected through the front case rear bracket and the rear case front bracket, so that when the mini-cultivator is operated to turn, the front frame and the front case rear bracket can swing together with the front gearbox and the transmission case compared with the rear frame, the rear case front bracket and the rear gearbox, the front end and the rear end of the mini-cultivator have two rotation points, and the mini-cultivator is more stable when rotating. Meanwhile, the central axes of the first pin shaft and the second pin shaft overlap, that is, the rotation points are on the same axis, so that the first pin shaft and the second pin shaft are also balanced in stress, and compared with one rotation shaft, the stress on the pin shaft is smaller after two points are used to realize rotation, and the service life of the pin shaft is also longer.

[0007] Further, the front frame is plate-shaped, a plurality of threaded holes are arranged on the left and right sides of the transmission case, a plurality of mounting holes corresponding to the threaded holes are arranged on the front frame, the front frame and the transmission case are fixedly connected through fastening bolts passing through the mounting holes and being screwed with the threaded holes. In this way, the front frame is fixedly connected with the transmission case through the fastening bolts, and the front frame is convenient to install and disassemble, and the front frame and the transmission case are fixedly connected and connected as a whole after the front frame is fixedly connected with the transmission case, so that the tension of the rear end can be transmitted to the transmission case body after the front frame is subjected to stress during turning.

[0008] Further, an installation plate extending outward is arranged at the rear end of the front gearbox, the front end of the front case rear bracket is clamped on the installation plate and connected with the installation plate through fastening members; a side plate extending outward is arranged at the front end of the rear gearbox, the rear end of the rear case front bracket is clamped on the side plate and fixed with the side plate through a plurality of fastening members. In this way, the front gearbox and the front case rear bracket and the rear gearbox and the rear case front bracket are fixedly connected through the fastening members, and the fixing is stable. The installation plate and the side plate are respectively clamped with the front case rear bracket and the rear case front bracket, and the installation structure is stable after being fixed by the fastening members.

[0009] Further, a protrusion is arranged at the lower end of the transmission case, the middle part of the front case rear bracket is clamped on the protrusion of the transmission case, and the transmission case is fixedly connected with the front case rear bracket through connecting bolts. In this way, the front end of the front case rear bracket is fixedly connected with the front transmission case, the middle part is fixedly connected with the transmission case, and the transmission case is fixedly arranged at the upper end of the front transmission case, so that an integral body is formed during steering, and the front case rear bracket has high strength and is not easy to deform after long-time use.

[0010] Further, two first clamping plates arranged in an up-down mode are arranged at one end of the front case rear bracket close to the rear case front bracket, two second clamping plates arranged in an up-down mode are arranged at one end of the rear case front bracket close to the front case rear bracket, the two first clamping plates are arranged between the two second clamping plates, and the first clamping plates and the second clamping plates are rotationally connected through the second pin shafts. In this way, the two first clamping plates and the two second clamping plates are rotationally connected through the second pin shafts, have two point positions during rotation, have higher structural strength, and are more stable during rotation. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is a side view of the frame connecting structure in the embodiment;

[0012] Figure 2 It is a perspective view of the frame connecting structure in the embodiment. DETAILED DESCRIPTION

[0013] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0014] It should be noted that similar reference numerals and letters refer to similar items in the following drawings, and therefore, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings. In the description of the present application, it should be explained that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed during use, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third", and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In addition, the terms "horizontal", "vertical", and the like do not mean that the components must be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined. In the description of the present application, it should be explained that, unless otherwise explicitly specified and limited, the terms "provided", "mounted", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between the two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0015] As Figure 1 , Figure 2As shown, the embodiment provides a frame connecting structure of a riding mini-tiller, which comprises a transmission box 2, a steering mechanism 3, a front gearbox 1, a rear gearbox 4, a front frame 5 and a rear frame 6. The transmission box 2 is fixedly installed on the front gearbox 1. The steering mechanism 3 is arranged between the transmission box 2 and the rear gearbox 4, one end of the steering mechanism 3 is connected with an output shaft of the transmission box 2, and the other end of the steering mechanism 3 is connected with a transmission mechanism in the rear gearbox 4. The front frame 5 is fixedly installed on the transmission box 2, and the rear frame 6 is fixedly installed on the rear gearbox 4. The front frame 5 and the rear frame 6 are overlapped in up-down direction, and the front frame 5 and the rear frame 6 are rotatably connected through a first pin shaft 7. A front-box rear bracket 8 is fixedly installed on a side of the front gearbox 1 facing the rear gearbox 4, and a rear-box front bracket 9 is fixedly installed on a side of the rear gearbox 4 facing the front gearbox 1. The front-box rear bracket 8 and the rear-box front bracket 9 are rotatably connected through a second pin shaft 10, and the second pin shaft 10 is overlapped with the first pin shaft 7 in axial line. In this way, the transmission box 2 is fixedly installed on the front gearbox 1. The front end and the rear end of the mini-tiller are rotatably connected through the upper frame and the lower frame in the upper part, and are rotatably connected through the front-box rear bracket 8 and the rear-box front bracket 9 in the lower part. When the mini-tiller is operated and steered, the front frame 5 and the front-box rear bracket 8 can swing together with the front gearbox 1 and the transmission box 2, compared with the rear frame 6, the rear-box front bracket 9 and the rear gearbox 4. The front end and the rear end of the mini-tiller have two rotation points, and the rotation is more stable. Meanwhile, the central axes of the first pin shaft 7 and the second pin shaft 10 are overlapped, that is, the rotation points are on the same axis, so that the first pin shaft 7 and the second pin shaft 10 are also balanced in stress. Compared with one rotation shaft for realizing the rotation connection, the two points for realizing the rotation, the pin shaft is less stressed, and the service life is also longer.

[0016] Specifically, the transmission box 2 comprises a front box 21 and a middle box 22. The front box 21 is fixed on the front gearbox 1, and the middle box 22 is installed on the rear side of the front box 21. The transmission mechanism of the front box 21 is in transmission connection with a speed transmission mechanism in the front gearbox 1, for driving the front axle to rotate. The transmission mechanism in the middle box 22 is in transmission connection with the transmission mechanism of the front box 21, and the output end is in transmission connection with the steering mechanism 3. After the power is transmitted to the speed transmission mechanism in the rear gearbox 4 through the steering mechanism 3, the rear axle is driven to rotate. The steering mechanism 3 is a two-transmission-connection universal joint structure, which can rotate in multiple directions. One of the universal joints is directly below the first pin shaft 7. In order to protect the steering mechanism 3, a protective cover is also fixedly installed on the rear frame 6, which covers the steering mechanism 3.

[0017] In the embodiment, the rear frame 6 is used as a support frame of a seat of the mini-tiller. A seat support plate is fixedly installed on the rear end of the rear frame 6. The rear frame 6 and the cover of the rear gearbox 4 are fixedly connected through fasteners.

[0018] Further, the front rack 5 is plate-shaped, a plurality of threaded holes are arranged on the left and right sides of the middle box 22 of the transmission box 2, a plurality of mounting holes corresponding to the threaded holes are arranged on the front rack 5, and the front rack 5 and the transmission box 2 are fixedly connected through threaded connection of the fastening bolts passing through the mounting holes and the threaded holes. In this way, the front rack 5 is fixedly connected with the transmission box 2 through the fastening bolts, and the installation and disassembly are relatively convenient. After the front rack 5 is fixedly connected with the transmission box 2, the front rack 5 and the transmission box 2 are connected as a whole, and the pulling force at the rear end can be transmitted to the box body of the transmission box 2 under the steering force.

[0019] Further, an installation plate (not marked in the figure) extending outward is arranged at the rear end of the front gearbox 1, the front end of the rear bracket 8 of the front box is clamped on the installation plate and connected with the installation plate through fasteners, and a side plate (not marked in the figure) extending outward is arranged at the front end of the rear gearbox 4, the rear end of the front bracket 9 of the rear box is clamped on the side plate and fixed with the side plate through a plurality of fasteners. In this way, the front gearbox 1 and the rear bracket 8 of the front box 21, and the rear gearbox 4 and the front bracket 9 of the rear box are fixedly connected through the fasteners, and the fixing is relatively stable. The installation plate and the side plate are respectively clamped with the rear bracket 8 of the front box 21 and the front bracket 9 of the rear box, and the fit is relatively close, and then fixed by the fasteners, so that the installation structure is stable.

[0020] Further, a protrusion is arranged at the lower end of the transmission box 2, the middle part of the rear bracket of the front box 21 is clamped on the protrusion of the transmission box 2, and fixedly connected with the transmission box 2 through the connecting bolts. In this way, the front end of the rear bracket of the front box 21 is fixedly connected with the front gearbox 1, the middle part is fixedly connected with the transmission box 2, and the transmission box 2 is fixedly connected on the upper end of the front gearbox 1, so that an integral body is formed during steering, and the rear bracket of the front box 21 has relatively high strength and is not easy to deform after long-term use.

[0021] Further, the first clamping plates 83 are arranged on one end of the rear bracket 8 of the front box close to the front bracket 9 of the rear box, the second clamping plates 91 are arranged on one end of the front bracket 9 of the rear box close to the rear bracket of the front box 21, the two first clamping plates 83 are arranged between the two second clamping plates 91, and the first clamping plates 83 and the second clamping plates 91 are rotationally connected through the second pin shaft 10. In this way, the two first clamping plates 83 and the two second clamping plates 91 are rotationally connected through the second pin shaft 10, and have two point positions during rotation, so that the structure has higher strength and the rotation is relatively stable.

[0022] In the embodiment, the rear bracket 8 of the front box is mainly composed of two vertical plates 81 arranged in parallel, two connecting plates 82 welded and fixed on the upper and lower ends of the vertical plates 81, and two first clamping plates 83 welded and fixed on the rear ends of the two vertical plates 81. A reinforcing plate is welded and fixed between the two first clamping plates 83 and is connected with the two vertical plates 81. The length of the two connecting plates 82 is less than the length of the vertical plates 81, and a clamping space matched with the front transmission box 1 is formed between the two vertical plates 81. A plurality of strip-shaped holes are arranged on the two vertical plates 81 in one-to-one correspondence, and a through hole corresponding to each strip-shaped hole is arranged on the mounting plate. The upper side of the rear end of each vertical plate 81 extends upward to form a clamping space for clamping and fixing the protrusion of the transmission box 2.

[0023] The rear bracket 9 of the rear box is similar in structure to the rear bracket 8 of the front box 21 and is mainly composed of two second clamping plates 91 and two rear vertical plates 92 welded and fixed on the rear ends of the two second clamping plates 91. Reinforcing plates are welded and fixed between the two rear vertical plates 92 and between the two second clamping plates 91.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and not to limit the technical solutions. Those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the present application, and should be covered in the scope of the claims of the present application.

Claims

1. A riding mini-tiller frame connection structure, comprising a transmission case, a steering mechanism, a front gearbox, a rear gearbox, a front frame and a rear frame, the transmission case being fixedly installed on the front gearbox, the steering mechanism being disposed between the transmission case and the rear gearbox, one end of the steering mechanism being connected with an output shaft of the transmission case and the other end of the steering mechanism being connected with a transmission mechanism in the rear gearbox; characterized in that, The front frame is fixedly installed on the transmission case, the rear frame is fixedly installed on the rear transmission case, and the front frame and the rear frame are rotationally connected through a first pin shaft.

2. The ride-on mini-tiller frame connection structure according to claim 1, characterized in that, The front frame is plate-shaped, a plurality of threaded holes are arranged on the left and right sides of the transmission case, a plurality of mounting holes corresponding to the threaded holes are arranged on the front frame, and the front frame and the transmission case are fixedly connected through fastening bolts penetrating through the mounting holes and being screwed with the threaded holes.

3. The ride-on mini-tiller frame connection structure according to claim 1 or 2, characterized in that, An installation plate extending outward is arranged at the rear end of the front transmission case, the front end of the front-box rear bracket is clamped on the installation plate, and the installation plate and the front-box rear bracket are connected through fastening members; a side plate extending outward is arranged at the front end of the rear transmission case, the rear end of the rear-box front bracket is clamped on the side plate, and the side plate and the rear-box front bracket are fixed through a plurality of fastening members.

4. The ride-on mini-tiller frame connection structure according to claim 3, characterized in that, A protrusion is arranged at the lower end of the transmission case, the middle part of the front-box rear bracket is clamped on the protrusion of the transmission case, and the transmission case and the front-box rear bracket are fixedly connected through a connecting bolt.

5. The ride-on mini-tiller frame connection structure according to claim 4, characterized in that, The front-box rear bracket has two first clamping plates arranged in an up-down mode at one end close to the rear-box front bracket, the rear-box front bracket has two second clamping plates arranged in an up-down mode at one end close to the front-box rear bracket, the two first clamping plates are arranged between the two second clamping plates, and the first clamping plates and the second clamping plates are rotationally connected through a second pin shaft.

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