CN202232203U - Transmission case for double-knife reciprocating cutter - Google Patents

Abstract

A double-moving knife reciprocating cutter transmission box relates to agricultural machinery, in particular to a double-moving knife reciprocating cutter transmission box for reducing the volume of the double-moving knife reciprocating cutter. A double-moving knife reciprocating cutter transmission box of the present utility model includes a box body, an upper swing arm and a lower swing arm, and is characterized in that a power input shaft, a large bevel gear, a small bevel gear and an eccentric mechanism are integrated in the box Assembly, one end of the power output shaft is splined to connect with the external power, and the other end is fixedly connected to the large gear; the small bevel gear is installed on the eccentric mechanism assembly and meshes with the large bevel gear; the eccentric mechanism assembly is connected to the upper swing arm and the lower swing arm are respectively connected to drive the upper swing arm and the lower swing arm to reciprocate. The transmission box of the double-moving-knife reciprocating cutter of the utility model has a compact structure, is convenient for connection, and can conveniently realize the transmission function between the small farm tool and the double-moving-knife reciprocating cutter.

Description

Double-action knife reciprocating cutter transmission box

technical field

The utility model relates to agricultural machinery, in particular to a double-moving knife reciprocating cutter transmission box for reducing the volume of the double-moving knife reciprocating cutter.

Background technique

At present, single-action knife reciprocating cutters are used on rice and wheat harvesters. The structure is that a certain number of edge guards are installed on the cutter beam, and each edge guard has a fixed blade, and there is a tongue guard on the upper part of the fixed blade. , The tip of the blade guard body is used to guide the grain. The moving knife rod and the moving blade are located at the lower part of the tongue guard. When the movable blade reciprocates on the fixed blade, the fixed blade and the tongue guard are used as lateral support to cut off the crops. The single-moving knife reciprocating cutter is characterized in that it only needs to drive a set of moving blades for reciprocating motion, but in use, it has the following disadvantages: First, because a set of moving blades is fixed on the moving knife rod, Its mass is large, and the inertial force acting on the driving mechanism of the cutter is relatively large when it is in high-speed reciprocating motion, and it can only be partially balanced, so the vibration and wear of the machine are relatively large, and it is easy to cause failure; The fixed rotor is fixed, and the average cutting speed is not high. If the cutting speed is increased, the speed of the driving mechanism must be increased, and the increase of the speed will further increase the inertia, which also limits the improvement of the machine's operating efficiency.

In order to overcome the deficiency of using the single-action knife reciprocating cutter on the rice and wheat harvester, it is a kind of solution to adopt the double-action knife reciprocating cutter. When working, the double-moving knife reciprocating cutter moves up and down at the same speed and equal stroke, and reciprocates in the opposite direction to cut crops. Therefore, when the stroke is the same, its cutting speed is twice that of the single-moving knife, the cutting speed is large, and the effect The reciprocating inertial forces on the driving mechanism cancel each other out, so there is less vibration, less wear and less failure. And the existing double-moving knife reciprocating cutter is basically used with medium and large combine harvesters, and its driving device is installed on one side or both sides of the working width, and mechanisms such as crank connecting rods are used to realize reciprocating motion. The structural form is more complicated to install for small-scale agricultural implements, which is not conducive to layout.

Contents of the invention

What the utility model aims to solve is the problem that the existing double-moving knife reciprocating cutter has a large volume and cannot be installed and used on small agricultural tools. Knife reciprocating cutter transmission box.

A double-moving knife reciprocating cutter transmission box of the present utility model includes a box body, an upper swing arm and a lower swing arm, and is characterized in that a power input shaft, a large bevel gear, a small bevel gear and an eccentric mechanism are integrated in the box Assembly, one end of the power output shaft is splined to connect with the external power, and the other end is fixedly connected to the large gear; the small bevel gear is installed on the eccentric mechanism assembly and meshes with the large bevel gear; the eccentric mechanism assembly is connected to the upper swing arm and the lower swing arm are respectively connected to drive the upper swing arm and the lower swing arm to reciprocate.

The eccentric mechanism assembly includes an eccentric shaft, an upper swing arm shaft, a lower swing arm shaft, a lower arm and an eccentric arm. The eccentric shaft and the upper swing arm shaft are arranged vertically and parallel to each other; Horizontal eccentric arm; the shaft of the upper swing arm connects the shaft of the lower swing arm and the lower arm respectively from top to bottom; The arm shafts are all provided with splines, and are respectively connected with the upper swing arm and the lower swing arm through the splines.

Four threaded holes are arranged on the front end surface of the transmission box body, and the transmission box is connected with the cutter through the threaded holes.

The external power drives the power input shaft to rotate through the spline, and the power input shaft transmits the power to the eccentric shaft through the large bevel gear fixed on it and the small bevel gear meshing with the large bevel gear, driving the eccentric shaft and the eccentric shaft up and down The set eccentric arm rotates, the upper eccentric arm drives the lower swing arm shaft to perform reciprocating rotational movement through the pin shaft, and the lower eccentric arm drives the lower arm to rotate through the pin shaft, thereby driving the upper swing arm shaft to perform reciprocating rotational movement. The lower swing arm is respectively driven by the upper swing arm shaft and the lower swing arm shaft to reciprocate, so as to drive the double-knife reciprocating cutter to complete the cutting work.

The transmission box of the double-knife reciprocating cutter of the utility model has a compact structure and is easy to connect, and can conveniently realize the transmission function between small-scale agricultural tools and the double-knife reciprocating cutter, effectively reducing the traditional double-knife reciprocating cutting. The small size of the machine makes it easy to install and use on small agricultural tools. The transmission mode adopts eccentric transmission, which is convenient for machine tool connection, reduces maintenance times, improves utilization rate, and reduces production costs.

Description of drawings

Fig. 1 is a schematic cross-sectional structure diagram of the utility model.

Fig. 2 is a top view of the utility model.

Fig. 3 is a structural schematic diagram of the eccentric mechanism assembly of the utility model.

Fig. 4 is a top view of the eccentric mechanism assembly of the present invention.

Fig. 5 is a schematic diagram of the structure of the eccentric shaft of the utility model.

Fig. 6 is a plan view of the eccentric shaft of the utility model.

Among them, box 1, upper swing arm 2, lower swing arm 3, power input shaft 4, large bevel gear 5, small bevel gear 6, eccentric shaft 7, upper swing arm shaft 8, lower swing arm shaft 9, lower arm 10, eccentric Arm 11, pin 12. the

Detailed ways

Embodiment 1: A double-moving knife reciprocating cutter transmission box, including a box body 1, an upper swing arm 2 and a lower swing arm 3, and a power input shaft 4, a large bevel gear 5, a small bevel gear 6 and Eccentric mechanism assembly, one end of the power output shaft is splined to connect with the external power, and the other end is fixedly connected to the large gear; the small bevel gear 6 is installed on the eccentric mechanism assembly and meshes with the large bevel gear 5; the eccentric mechanism assembly It is respectively connected with the upper swing arm 2 and the lower swing arm 3, and drives the upper swing arm 2 and the lower swing arm 3 to reciprocate. The eccentric mechanism assembly includes an eccentric shaft 7, an upper swing arm shaft 8, a lower swing arm shaft 9, a lower arm 10 and an eccentric arm 11. The eccentric shaft 7 and the upper swing arm shaft 8 are vertically arranged and parallel to each other; Two horizontal eccentric arms 11 are set up and down; the upper swing arm shaft 8 is respectively connected to the lower swing arm shaft 9 and the lower arm 10 from top to bottom, and the lower swing arm shaft 9 and the lower arm 10 are respectively connected to the upper and lower arms through the pin shaft 12. The two eccentric arms 11 are hinged; the upper swing arm shaft 8 and the lower swing arm shaft 9 are provided with splines, and are respectively connected with the upper swing arm 2 and the lower swing arm 3 through the splines. Four threaded holes are arranged on the front end surface of the transmission box casing 1, and the transmission box is connected with the cutter through the threaded holes.

The external power drives the power input shaft 4 to rotate through the spline, and the power input shaft 4 moves through the large bevel gear 5 fixedly installed on it and the small bevel gear 6 meshing with the large bevel gear 5 to transmit the power to the eccentric shaft 7, driving the eccentric The eccentric arm 11 arranged up and down on the shaft 7 and the eccentric shaft 7 rotates. The upper eccentric arm 11 drives the lower swing arm shaft 9 to perform reciprocating rotational movement through the pin shaft 12. The lower eccentric arm 11 drives the lower arm 10 to rotate through the pin shaft 12. In this way, the upper swing arm shaft 8 is driven to perform reciprocating rotation, and the upper swing arm 2 and the lower swing arm 3 are respectively driven by the upper swing arm shaft 8 and the lower swing arm shaft 9 to perform reciprocating motion, thereby driving the double-moving knife reciprocating cutter to complete cutting work.

Claims (3)

1. two moving knife reciprocating cutterbar transmission case; Comprise casing (1), top link (2) and swing arm (3) down; It is characterized in that integrated power input shaft (4) in the described casing (1), bevel gear wheel (5), bevel pinion (6) and eccentric stiffener assembly; Power take-off one end is that the spline form is connected with external power, and the other end is fixedly connected with the big vertebra gear; Bevel pinion (6) is installed on the eccentric stiffener assembly, and meshes with bevel gear wheel (5); The eccentric stiffener assembly is connected respectively with top link (2), following swing arm (3), drives top link (2) and following swing arm (3) and moves reciprocatingly.

2. a kind of pair of moving knife reciprocating cutterbar transmission case as claimed in claim 1; It is characterized in that described eccentric stiffener assembly comprises eccentric shaft (7), top link axle (8), following arm shaft (9), underarm (10) and eccentric arm (11); Eccentric shaft (7) vertically is provided with top link axle (8), and is parallel to each other; The eccentric arm (11) of upper and lower two levels is set on the eccentric shaft (7); Top link axle (8) connects arm shaft (9) and underarm (10) down from top to bottom respectively, and following arm shaft (9) is hinged with two eccentric arms (11) of upper and lower setting through bearing pin (12) respectively with underarm (10); Be provided with spline on top link axle (8) and the following arm shaft (9), and be connected with top link (2), following swing arm (3) respectively through spline.

3. a kind of pair of moving knife reciprocating cutterbar transmission case as claimed in claim 1 is characterized in that described transmission case casing (1) front end end face is provided with four screwed holes, and transmission case is connected with cutter through screwed hole.

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