Anti-reverse chain wheel for rotary tillage seeder

Abstract

The utility model discloses an anti-reverse chain wheel for a rotary tillage seeding machine, relates to the technical field of rotary tillage seeding machine accessories, and solves the technical problem that when the rotary tillage seeding machine turns, a material roller in a seeding box is easily driven to rotate due to reverse rotation of a pressurizing wheel, so that seeds are misused. Comprising a base, a rotating shaft, a first gear and a second gear, the second gear is installed on the rotating shaft, the rotating shaft is rotationally connected with the base, a cylindrical part is coaxially connected to the end of the rotating shaft, the first gear comprises a ring body, a fluted disc and a plurality of groove bodies, the fluted disc and the ring body are coaxially arranged, the groove bodies are distributed in the circumferential direction of the inner side wall of the ring body, and the ring body sleeves the cylindrical part; an elastic piece capable of extending into the groove body is arranged on the side wall of the cylindrical piece, and when the second gear rotates forwards, the groove body cannot compress the elastic piece. According to the utility model, when the pressurizing wheel of the rotary tillage seeder is lifted to turn, the material roller in the seeding box cannot be driven to rotate due to the reverse rotation of the pressurizing wheel, so that the waste of mistaken seeding of seeds is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of rotary tillage seeder accessories, in particular to an anti-reversal sprocket for a rotary tillage seeder. Background Art

[0002] With the advancement of agricultural modernization, rotary tillage seeders have played an important role in agricultural production. Rotary tillage seeders can complete multiple processes such as rotary tillage, sowing, and fertilization at one time, thereby improving agricultural production efficiency.

[0003] Most of the existing rotary tillage seeders adopt the following technical features:

[0004] 1. Booster wheel design: By controlling the contact between the booster wheel and the ground, soil compaction is achieved to ensure close contact between seeds and soil; 2. Transmission mechanism: Using chain and double-drive sprocket transmission, the booster wheel drives the material roller in the seeding box to rotate when it rotates, realizing automatic sowing; 3. Soil cleaning: During rotary tillage and sowing operations, mud and weed residues are easily accumulated on the booster wheel, which are usually cleaned with a rotating tool.

[0005] However, the existing rotary tillage seeder has the following problems during the turning process:

[0006] 1. Reversal of the booster wheel: When the rotary tillage seeder is turning (no sowing is needed at this time), the suspension on the tractor will lift the booster wheel so that it is not in contact with the ground, but the rotating cutter will still act on the soil on the booster wheel, causing the booster wheel to reverse.

[0007] 2. Mis-sowing of seeds: The booster wheel and the material roller in the seeding box are driven by chains and sprockets. The booster wheel will synchronously drive the material roller to rotate regardless of whether it rotates forward or reverse, causing the rotary seeder to easily sow when turning, resulting in mis-sowing of seeds and waste. Utility Model Content

[0008] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes an anti-reverse sprocket for a rotary tillage seeder, which solves the problem that when the rotary tillage seeder turns, the booster wheel is easily reversed, which drives the material roller in the seeding box to rotate, thereby causing the seeds to be mis-sown.

[0009] To achieve the above-mentioned purpose, according to an embodiment of the first aspect of the utility model, an anti-reverse sprocket for a rotary tiller is proposed, comprising a base, a rotating shaft, a first gear and a second gear, the second gear being mounted on the rotating shaft, and the rotating shaft being rotatably connected to the base, a cylindrical member being coaxially connected to the end of the rotating shaft, the first gear comprising a ring body, a toothed disc and a plurality of groove bodies, the toothed disc being coaxially arranged with the ring body, a plurality of the groove bodies being circumferentially distributed along the inner wall of the ring body, the ring body being mounted on the cylindrical member, and an elastic member that can extend into the groove body is provided on the side wall of the cylindrical member, when the second gear rotates forward, the groove body cannot compress the elastic member, thereby driving the first gear to rotate forward synchronously, and when the second gear reverses, the groove body compresses the elastic member, thereby not driving the first gear to reverse.

[0010] As a further technical solution of the utility model, the groove body includes a blocking groove and an extrusion groove which are connected to each other, the bottom depth of the extrusion groove gradually decreases from the direction away from the blocking groove, and one end of the extrusion groove away from the blocking groove extends to the inner wall of the ring body.

[0011] As a further technical solution of the utility model, the elastic member includes a movable pin, a groove and a spring. The groove is symmetrically arranged on the side wall of the cylindrical member. The movable pin is slidably plugged into the groove. The spring is installed between the end of the movable pin and the bottom of the groove.

[0012] As a further technical solution of the utility model, the depth of the blocking groove is greater than the depth of the extrusion groove, and the distance between the end of the extrusion groove and the axis of the ring body is equal to the inner diameter of the ring body.

[0013] As a further technical solution of the utility model, the top and bottom ends of the ring body are respectively provided with an upper step groove of an annular structure and a lower step groove of an annular structure, the bottom of the cylindrical member is coaxially connected with a support plate which engages with the lower step groove, a matching pressure ring is provided in the upper step groove, and a clamping ring for limiting the position of the pressure ring is installed on the cylindrical member.

[0014] As a further technical solution of the utility model, a bearing for the rotation of the shaft is installed in the base, and a plurality of mounting holes evenly distributed in an annular shape are opened on the base.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] In the utility model, through the groove body distributed circumferentially on the inner wall of the ring body and the elastic part on the side wall of the cylindrical part, when the second gear rotates forward, the cylindrical part drives the elastic part to apply thrust to the groove body, so as to drive the first gear to rotate forward synchronously. When the second gear is reversed, the groove body adaptively squeezes the elastic part on the cylindrical part to make it adaptively contract, thereby not driving the first gear to reverse, so that the rotary seeder will not waste sowing during the turning process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of an anti-reverse sprocket for a rotary tillage seeder of the utility model;

[0018] Figure 2 It is a three-dimensional diagram of the first gear in the anti-reverse sprocket for a rotary tillage seeder of the utility model;

[0019] Figure 3 It is a three-dimensional diagram of the connection part between the cylindrical part and the elastic part in the anti-reversal sprocket for the rotary tillage seeder of the utility model;

[0020] Figure 4 It is a cross-sectional view of the connection part between the first gear and the cylindrical member in the anti-reverse sprocket for a rotary tillage seeder of the utility model;

[0021] Figure 5 for Figure 4 Enlarged view of part A.

[0022] In the figure: 1. base; 2. rotating shaft; 3. first gear; 301. ring body; 302. toothed disc; 303. groove body; 3031. blocking groove; 3032. extrusion groove; 4. second gear; 5. cylindrical member; 6. elastic member; 601. movable pin; 602. groove; 603. spring; 7. upper step groove; 8. lower step groove; 9. supporting plate; 10. pressure ring; 11. retaining ring; 12. mounting hole; 13. annular groove. DETAILED DESCRIPTION

[0023] The technical solution of the utility model will be described clearly and completely in conjunction with the embodiments below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] like Figure 1-5 As shown, an anti-reverse sprocket for a rotary tillage seeder includes a base 1, a rotating shaft 2, a first gear 3 and a second gear 4. In this embodiment, the second gear 4 is conventionally connected to the booster wheel of the rotary tillage seeder through a chain, the first gear 3 is transmission-connected to the material roller in the seeding box of the rotary tillage seeder through a chain, the second gear 4 is mounted on the rotating shaft 2, and the rotating shaft 2 is rotatably connected to the base 1, a bearing for rotating the rotating shaft 2 is installed in the base 1, and a plurality of mounting holes 12 evenly distributed in an annular shape are opened on the base 1, which facilitates the base 1 to be fixedly mounted on the outer wall of the rotary tillage seeder with the help of bolts.

[0025] The end of the rotating shaft 2 is coaxially connected with a cylindrical member 5. In order to reduce the weight of the cylindrical member 5, the cylindrical member 5 is designed as an internal hollow structure in this embodiment. The first gear 3 includes a ring body 301, a toothed disc 302 and a plurality of grooves 303. The toothed disc 302 is coaxially arranged with the ring body 301. In order to improve the overall structural strength of the first gear 3, in this embodiment, the toothed disc 302 and the ring body 301 are integrally formed, and the ring body 301 is mounted on the cylindrical member 5.

[0026] In order to facilitate the support of the ring body 301, in the present embodiment, the top and bottom ends of the ring body 301 are respectively provided with an upper step groove 7 of an annular structure and a lower step groove 8 of an annular structure, and the bottom of the cylindrical member 5 is coaxially connected with a support plate 9 which engages with the lower step groove 8. In order to prevent the ring body 301 from jumping during rotation, in the present embodiment, a matching pressure ring 10 is provided in the upper step groove 7, a retaining ring 11 for limiting the position of the pressure ring 10 is installed on the cylindrical member 5, and an annular groove 13 for installing the retaining ring 11 is provided on the side wall of the cylindrical member 5.

[0027] A plurality of grooves 303 are distributed circumferentially along the inner wall of the ring body 301, and the groove body 303 includes a blocking groove 3031 and an extrusion groove 3032 which are connected to each other. The depth of the bottom of the extrusion groove 3032 gradually decreases from the direction away from the blocking groove 3031, and one end of the extrusion groove 3032 away from the blocking groove 3031 extends to the inner wall of the ring body 301, the depth of the blocking groove 3031 is greater than the depth of the extrusion groove 3032, and the distance between the end of the extrusion groove 3032 and the axis of the ring body 301 is equal to the inner diameter of the ring body 301.

[0028] An elastic member 6 that can extend into the groove body 303 is provided on the side wall of the cylindrical member 5. The elastic member 6 includes a movable pin 601, a groove 602 and a spring 603. The groove 602 is symmetrically arranged on the side wall of the cylindrical member 5. The movable pin 601 is slidably plugged into the groove 602. The spring 603 is installed between the end of the movable pin 601 and the bottom of the groove 602. When the second gear 4 rotates forward, the groove body 303 cannot compress the elastic member 6, thereby driving the first gear 3 to rotate forward synchronously. When the second gear 4 reverses, the groove body 303 compresses the elastic member 6, thereby not driving the first gear 3 to reverse.

[0029] The working principle of the utility model is as follows: when the rotary tillage seeder is moving and sowing, the booster wheel contacts the ground, and the friction force is used to make the booster wheel rotate forward, which in conjunction with the chain transmission will drive the second gear 4 to rotate forward, thereby driving the rotating shaft 2 and the cylindrical member 5 to rotate forward synchronously. During the forward rotation, the movable pin 601 of the elastic member 6 extends into the blocking groove 3031, causing the movable pin 601 to apply a deflection force to the end of the blocking groove 3031 away from the extrusion groove 3032, thereby making the first gear 3 rotate forward, and the chain transmission is used to make the material roller in the sowing box rotate forward synchronously, thereby achieving sowing. When the rotary tillage seeder is turning, the booster wheel will be lifted up and will not contact the ground, and the cutter will continue to rotate to When the soil on the booster wheel is removed and the tool acts on the soil on the booster wheel, the booster wheel will reverse. Similarly, the second gear 4 will drive the rotating shaft 2 and the cylindrical member 5 to reverse. During the reversal, the bottom depth of the extrusion groove 3032 gradually decreases from the direction away from the blocking groove 3031, thereby adaptively compressing the movable pin 601 to slide toward the bottom of the groove 602 and compress the spring 603. During this process, the ring body 301 is not affected by the deflection thrust of the movable pin 601, so the first gear 3 will not rotate, thereby avoiding driving the material roller in the seeding box to rotate, so that the rotary seeder will not cause waste due to continuous sowing during the turning process.

[0030] The above embodiments are only used to illustrate the technical method of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical method of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the utility model.

Claims

1. An anti-reverse sprocket for a rotary tillage seeder, comprising a base (1), a rotating shaft (2), a first gear (3) and a second gear (4), characterized in that: The second gear (4) is mounted on the rotating shaft (2), and the rotating shaft (2) is rotatably connected to the base (1). The end of the rotating shaft (2) is coaxially connected to a cylindrical member (5). The first gear (3) comprises a ring body (301), a toothed disc (302) and a plurality of grooves (303). The toothed disc (302) is coaxially arranged with the ring body (301). The plurality of grooves (303) are circumferentially distributed along the inner wall of the ring body (301). The ring body (301) is sleeved on the cylindrical member (5), and an elastic member (6) that can extend into the groove body (303) is provided on the side wall of the cylindrical member (5). When the second gear (4) rotates forward, the groove body (303) cannot compress the elastic member (6), thereby driving the first gear (3) to rotate forward synchronously. When the second gear (4) rotates reversely, the groove body (303) compresses the elastic member (6), thereby not driving the first gear (3) to rotate reversely.

2. The anti-reverse sprocket for a rotary tillage seeder according to claim 1, characterized in that: The groove body (303) comprises a blocking groove (3031) and an extrusion groove (3032) which are connected to each other. The groove bottom depth of the extrusion groove (3032) gradually decreases in the direction away from the blocking groove (3031), and one end of the extrusion groove (3032) away from the blocking groove (3031) extends to the inner wall of the ring body (301).

3. The anti-reverse sprocket for a rotary tillage seeder according to claim 1, characterized in that: The elastic member (6) comprises a movable pin (601), a groove (602) and a spring (603); the groove (602) is symmetrically arranged on the side wall of the cylindrical member (5); the movable pin (601) is slidably plugged into the groove (602); and the spring (603) is installed between the end of the movable pin (601) and the bottom of the groove (602).

4. The anti-reverse sprocket for a rotary tillage seeder according to claim 2, characterized in that: The depth of the blocking groove (3031) is greater than the depth of the extrusion groove (3032), and the distance between the end of the extrusion groove (3032) and the axis of the ring body (301) is equal to the inner diameter of the ring body (301).

5. The anti-reverse sprocket for a rotary tillage seeder according to claim 1, characterized in that: The top and bottom ends of the ring body (301) are respectively provided with an upper step groove (7) of an annular structure and a lower step groove (8) of an annular structure; the bottom of the cylindrical member (5) is coaxially connected with a support plate (9) engaged with the lower step groove (8); a matching pressure ring (10) is provided in the upper step groove (7); and a retaining ring (11) for limiting the position of the pressure ring (10) is installed on the cylindrical member (5).

6. The anti-reverse sprocket for a rotary tillage seeder according to claim 1, characterized in that: A bearing for rotating the rotating shaft (2) is installed in the base (1), and a plurality of mounting holes (12) evenly distributed in an annular shape are provided on the base (1).

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