Cam structure for rotary box of rice transplanter

Abstract

The utility model discloses a cam structure for a revolving box of a rice transplanter, which comprises a cam and a cam shaft, the cam is provided with an eccentric hole, and the eccentric hole at least comprises a plane; the cam shaft comprises a shaft rod and a plug fixedly connected to one end of the shaft rod, and at least one plane cutting groove is formed in the end, away from the plug, of the shaft rod in the axial direction. A clamping groove is formed in the periphery of the end, away from the plug, of the shaft rod. Through the design of the eccentric hole and the plane cutting groove of the cam, the eccentric hole and the plane cutting groove are tightly attached along the axial face of the shaft rod, the contact area is increased, the looseness phenomenon of the cam in the operation process is effectively prevented, and the stability and the reliability of the whole cam structure are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to an agricultural machinery accessory, concretely relates to a cam structure for rotary box of rice transplanter. BACKGROUND

[0002] In modern agricultural machinery, as a kind of efficient rice planting equipment, the working performance of rice transplanter has a vital influence on agricultural production efficiency and quality. Among them, rotary box is one of the key components of rice transplanter, is responsible for transmitting power and controls the insertion action of seedling. And cam structure is an indispensable part inside rotary box, it is directly related to the precision and reliability of transplanting operation.

[0003] The cam structure used on the traditional rotary box of rice transplanter usually includes a cam with eccentric hole and a cam shaft matched with it, eccentric hole and clamping groove are arranged on the cam, and recess is arranged on the cam shaft matched with the clamping groove, when installing, the clamping block is placed in the recess, the cam is sleeved on the outer cam shaft, and the clamping block is also located in the clamping groove. However, when rotary box rotates at high speed, the friction between cam and cam shaft is easy to cause rapid wear due to the complex stress and limited contact surface. After long time use, it can cause loose fit, and then the problem of cam shaft falling off can occur, which affects the normal work of rice transplanter, increases maintenance cost and time. And the installation mode in traditional design is relatively complex, needs to accurately align multiple components, increases assembly difficulty and time cost. In addition, once failure occurs or needs to be repaired and replaced, the process of disassembly and reassembly is relatively cumbersome, which brings inconvenience to farmers.

[0004] In view of these problems, the utility model provides an improved cam structure for rotary box of rice transplanter to overcome the defects in the prior art. UTILITY MODEL CONTENTS

[0005] The technical problem to be solved by the utility model is that, in view of the above shortcomings of prior art, a cam structure for rotary box of rice transplanter is provided.

[0006] To achieve the purpose, the utility model adopts the following technical scheme:

[0007] A cam structure for rotary box of rice transplanter, comprising:

[0008] Cam, the cam is provided with eccentric hole, and the eccentric hole includes at least one plane;

[0009] Cam shaft, the cam shaft includes shaft and plug fixedly connected at one end of the shaft, and the shaft is provided with at least one plane slot in the axial direction away from the plug.

[0010] Preferably, the shaft rod is provided with a clamping groove outside the end periphery of the plug.

[0011] The utility model discloses the beneficial effects of:

[0012] (1) enhanced stability: through the eccentric hole and the design of the plane cut slot of cam, make the two along the axial surface of the shaft close, increase the contact area, effectively prevent the loosening phenomenon of cam in the running process, improve the stability and reliability of the whole cam structure.

[0013] (2) improve wear resistance: due to the increase of contact area, the pressure distribution is more uniform, reduces the possibility of local wear and tear, thereby prolongs the service life of cam structure, reduces the maintenance cost.

[0014] (3) simplify structure: compared with traditional design, the application adopts more simple design concept, not only convenient for manufacturing and processing, and installation is convenient and fast, need not complex assembly steps can realize accurate positioning and fixed.

[0015] (4) optimization performance: the cam structure of the application can better adapt to the working environment of rice transplanter, ensures the smooth operation of the machine under long time, high intensity work, has important significance for improving the efficiency of agricultural production. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to easily illustrate, the utility model is described in detail by the following specific implementation and drawing.

[0017] Figure 1 It is the assembly structure schematic drawing of example 1;

[0018] Figure 2 It is the cam structure schematic drawing of example 1;

[0019] Figure 3 It is the cam shaft structure schematic drawing of example 1;

[0020] Figure 4 It is the assembly structure schematic drawing of example 2;

[0021] Figure 5 It is the cam structure schematic drawing of example 2;

[0022] Figure 6 It is the cam shaft structure schematic drawing of example 2;

[0023] Figure 7 It is the structure schematic drawing of example 1, example 2 installation in rotary box.

[0024] In the drawing:

[0025] 100 - cam; 110 - eccentric hole; 111 - flat surface; 200 - cam shaft; 210 - shaft; 211 - flat cut slot; 212 - clamping slot; 220 - plug; 300 - rotary box; 400 - retaining ring. DETAILED DESCRIPTION

[0026] The technical solutions of the utility model will be further described in combination with the embodiments of the utility model and the accompanying drawings, but the utility model is not limited to these embodiments; in the following description, specific details such as specific configurations and components are provided only to help comprehensively understand the embodiments of the utility model. Therefore, those skilled in the art should understand that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the utility model. In addition, in order to be clear and concise, the description of known functions and structures is omitted.

[0027] It should be noted that the embodiments and the features in the embodiments in the utility model can be combined with each other without conflict.

[0028] Embodiment 1

[0029] As shown in the figure, a cam structure of a rotary box for a rice transplanter is provided in the embodiment, which comprises a cam 100 and a cam shaft 200; the cam 100 is provided with an eccentric hole 110, and the eccentric hole 110 comprises a flat surface 111; the cam shaft 200 comprises a shaft 210 and a plug 220 fixedly connected to one end of the shaft 210, and the end of the shaft 210 away from the plug 220 is provided with a flat cut slot 211 along the axial direction. Figures 1-3 When the cam structure is installed on the rotary box 300, first, the shaft 210 of the cam shaft 200 is inserted into the hole on the rotary box 300, then the cam 100 is sleeved on the end of the shaft 210, and finally the retaining ring 400 is installed in the clamping slot 212 of the shaft 210, so that the axial movement of the cam 100 is limited.

[0030]

[0031] When the cam structure is installed on the rotary box 300, first, the shaft 210 of the cam shaft 200 is inserted into the hole on the rotary box 300, then the cam 100 is sleeved on the end of the shaft 210, and finally the retaining ring 400 is installed in the clamping slot 212 of the shaft 210, so that the axial movement of the cam 100 is limited. Figure 7 That is, a schematic view of the cam structure installed on the rotary box 300.

[0032] ​When the rotary box 300 rotates, the cam structure rotates with it, and the plane 111 of the eccentric hole 110 of the present embodiment is in contact with the axial plane of the plane cut groove 211, so the contact area is large, which can avoid the loosening between the cam 100 and the cam shaft 200, and also more wear-resistant, which improves the service life of the cam structure.

[0033] Embodiment 2

[0034] As Figures 4-6 The cam structure of the rotary box for the rice transplanter provided by the present embodiment is shown in the figure, and the difference between embodiment 2 and embodiment 1 is that the eccentric hole 110 includes two planes 111, and the shaft 210 is provided with two plane cut grooves 211 along the axial direction away from the plug 220.

[0035] It should be noted that the terms used herein are only for the purpose of describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, it means that the features, steps, operations, devices, components and / or combinations thereof are present.

[0036] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the purpose of facilitating the description of the present application and simplifying the description, and does not indicate or imply 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 a limitation on the present application.

[0037] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

Claims

1. A cam structure for a turning box of a rice transplanter, characterized by, The application relates to a cam (100) provided with an eccentric hole (110) comprising at least one flat surface (111), a cam shaft (200) comprising a shaft rod (210) and a plug (220) fixedly connected to one end of the shaft rod (210), and at least one flat surface cutting groove (211) provided on the end of the shaft rod (210) away from the plug (220). A clamping groove (212) is provided on the outer periphery of the end of the shaft rod (210) away from the plug (220) for mounting a retaining ring (400). ​ 2. The cam structure of the rotary box for the rice transplanter according to claim 1, wherein ​

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