Cutter head lifting mechanism

Abstract

The utility model discloses a cutterhead lifting mechanism, which belongs to the technical field of mowers and comprises a connecting shaft lever, connecting cross beams and a single telescopic push rod, the connecting shaft lever is fixedly connected onto a mounting frame of a vehicle body, the axis of the connecting shaft lever is perpendicular to the advancing direction of the vehicle body, and the connecting cross beams are arranged at intervals along the axis of the connecting shaft lever. A front lifting arm and a rear lifting arm are arranged on the connecting cross beam, cross beam hinge points, cutterhead hinge points and vehicle body hinge points are arranged on the front lifting arm and the rear lifting arm in a triangular shape, the cross beam hinge points are hinged to the connecting cross beam, the cutterhead hinge points are hinged to the cutterhead, and the vehicle body hinge points of the front lifting arm are hinged to the mounting frame; vehicle body hinge points of the rear lifting arms are hinged to the connecting shaft rod, the fixed end of the telescopic push rod is fixed to the mounting frame, and the telescopic end of the telescopic push rod is fixed to one of the rear lifting arms. The whole cutter head can be lifted only through one telescopic push rod, and the cutter head lifting device is suitable for lifting of various cutter heads, especially mowing cutter heads.

Description

Technical Field

[0001] The utility model relates to the technical field of lawn mowers, in particular to a cutter disc lifting mechanism. Background Art

[0002] The blade of a lawn mower usually requires a lifting mechanism to adjust the height and pitch angle to change the ground clearance of the blade. Currently, multiple electric push rods are generally used in the lifting mechanism to achieve lifting, but multiple electric push rods are not only difficult to ensure the synchronization rate, but also lead to a complex structure of the lifting mechanism and high purchase cost of electric push rods. Utility Model Content

[0003] The purpose of the utility model is to solve the above-mentioned technical problems and provide a cutter disc lifting mechanism, which connects the cross beam, the front lifting arm, the rear lifting arm, the connecting shaft rod and the cutter disc to form a linkage form. Only one telescopic push rod is needed to realize the lifting of the entire cutter disc, thereby avoiding the uneven cutter disc caused by the lack of synchronization of multiple telescopic push rods, the complex structure of the lifting mechanism, and the high equipment purchasing cost. The utility model is suitable for various cutter disc lifting, especially lawn mowing cutter discs.

[0004] To achieve the above-mentioned purpose, the utility model provides the following scheme: The utility model discloses a knife disc lifting mechanism, including a connecting shaft rod, a connecting cross beam and a single telescopic push rod, wherein the connecting shaft rod is fixedly connected to a mounting frame of a vehicle body, the axis of the connecting shaft rod is perpendicular to the forward direction of the vehicle body, the connecting cross beam is arranged at intervals along the axis of the connecting shaft rod, a front lifting arm and a rear lifting arm are arranged on the connecting cross beam, the front lifting arm and the rear lifting arm are arranged front and rear along the forward direction of the vehicle body, and the front lifting arm and the rear lifting arm are both provided with The crossbeam hinge point, the cutter disc hinge point and the vehicle body hinge point are arranged in a triangle, the crossbeam hinge point is hinged to the connecting crossbeam, the cutter disc hinge point is hinged to the cutter disc, the vehicle body hinge point of the front lifting arm is hinged to the vehicle body mounting frame, the vehicle body hinge point of the rear lifting arm is hinged to the connecting shaft rod, the fixed end of the telescopic push rod is fixedly connected to the vehicle body mounting frame, the telescopic end of the telescopic push rod is fixedly connected to one of the rear lifting arms, and the fixed end of the telescopic push rod is located between the front lifting arm and the rear lifting arm.

[0005] Preferably, the outer sleeve of the connecting shaft rod is provided with a rotating shaft sleeve and a locating bearing, the locating bearings are arranged at both ends of the locating bearing, the outer ring of the locating bearing is fixedly connected to the rotating shaft sleeve, the inner ring of the locating bearing is fixedly connected to the connecting shaft rod, and a mounting hole is provided at the vehicle body hinge point of the rear lifting arm, and the mounting hole is sleeved and fixedly connected to the rotating shaft sleeve.

[0006] Preferably, the connecting lines of the respective crossbeam hinge points and the cutter disc hinge points of the front lifting arm and the rear lifting arm are parallel to each other.

[0007] Preferably, the triangle is a right triangle, the vehicle body hinge point is located at the right angle point, and the line connecting the crossbeam hinge point and the vehicle body hinge point is shorter than the line connecting the cutter disc hinge point and the vehicle body hinge point.

[0008] Preferably, it includes a support spring, which is arranged obliquely, the raised end of the support spring is connected to the connecting crossbeam, the raised end of the support spring is close to the crossbeam hinge point of the front lifting arm, and the lowered end of the support spring is connected to the mounting frame of the vehicle body.

[0009] Preferably, the telescopic push rod is arranged obliquely, the fixed end of the telescopic push rod is a downward end, and the telescopic end of the telescopic push rod is an upward end.

[0010] Preferably, the telescopic push rod is an electric push rod, a hydraulic push rod or a pneumatic push rod.

[0011] Preferably, two travel switches are provided inside the telescopic push rod.

[0012] Compared with the prior art, the utility model has achieved the following technical effects:

[0013] In the knife disc lifting mechanism of the utility model, the connecting crossbeam, the front lifting arm, the rear lifting arm and the knife disc form a four-bar structure. When the telescopic push rod is extended and retracted, the rear lifting arm will rotate around its own vehicle body hinge point. Under the action of the connecting crossbeam, the front lifting arm will also be driven to rotate around its own vehicle body hinge point, so that the knife disc hinge points of the rear lifting arm and the front lifting arm are lifted or lowered. At the same time, under the action of the connecting shaft rod connecting all the rear lifting arms together, the knife disc hinge points of all the rear lifting arms and the front lifting arms are lifted or lowered, thereby driving the knife disc to be lifted and lowered. Therefore, the lifting mechanism forms a linkage form, and only one telescopic push rod is needed to realize the lifting of the entire knife disc, thereby avoiding the uneven knife disc caused by the lack of synchronization of multiple telescopic push rods, the complex structure of the lifting mechanism, and the high equipment procurement cost. The utility model is suitable for lifting various knife discs, especially lawn mowing knife discs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the cutter disc lifting mechanism;

[0016] Figure 2It is a top view structural diagram of the cutter disc lifting mechanism;

[0017] Figure 3 It is a side structural schematic diagram of the cutter disc lifting mechanism;

[0018] Figure 4 It is a three-dimensional structural diagram of the cutter disc lifting mechanism from another angle (without the connecting shaft);

[0019] Figure 5 It is the connection relationship diagram of the cutter head lifting mechanism and the mounting frame of the vehicle body;

[0020] Figure 6 A connection diagram of the connecting shaft, rotating sleeve and locating bearing;

[0021] Figure 7 This is a partial enlarged view of the cutter disc lifting mechanism.

[0022] Explanation of the reference numerals in the accompanying drawings: 1. connecting shaft; 2. connecting crossbeam; 3. telescopic push rod; 4. front lifting arm; 5. rear lifting arm; 6. crossbeam hinge point; 7. cutter disc hinge point; 8. vehicle body hinge point; 9. rotating shaft sleeve; 10. positioning bearing; 11. supporting spring; 12. articulated support; 13. fixed support; 100. cutter disc; 200. mounting frame. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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] This embodiment provides a cutter head lifting mechanism, such as Figures 1 to 7As shown, it includes a connecting shaft 1, a connecting beam 2 and a telescopic push rod 3. The connecting shaft 1 is fixedly connected to the mounting frame 200 of the vehicle body, and the axis of the connecting shaft 1 is perpendicular to the forward direction of the vehicle body. There are at least two connecting beams 2, and all the connecting beams 2 are arranged at intervals along the axis of the connecting shaft 1. Each connecting beam 2 is provided with a front lifting arm 4 and a rear lifting arm 5. The front lifting arm 4 and the rear lifting arm 5 are arranged front and back along the forward direction of the vehicle body. The front and rear mentioned here refer to the front and rear of the forward direction, that is, the front lifting arm 4 is closer to the front of the forward direction, and the rear lifting arm 5 is closer to the rear of the forward direction. The front lifting arm 4 and the rear lifting arm 5 are provided with a crossbeam hinge point 6, a knife disc hinge point 7 and a vehicle body hinge point 8, and the crossbeam hinge point 6, the knife disc hinge point 7 and the vehicle body hinge point 8 are arranged in a triangle. The crossbeam hinge point 6 is hinged to the connecting crossbeam 2, the cutter disc hinge point 7 is hinged to the cutter disc 100, the vehicle body hinge point 8 of the front lifting arm 4 is hinged to the vehicle body mounting frame 200, and the vehicle body hinge point 8 of the rear lifting arm 5 is hinged to the connecting shaft rod 1. The connecting crossbeam 2, the front lifting arm 4, the rear lifting arm 5 and the cutter disc 100 form a four-bar structure. There is only one telescopic push rod 3, the fixed end of which is fixedly connected to the mounting frame 200, and the telescopic end of the telescopic push rod 3 is fixedly connected to one of the plurality of rear lifting arms 5. The fixed end of the telescopic push rod 3 is located between the front lifting arm 4 and the rear lifting arm 5.

[0025] Working principle:

[0026] by Figure 3 For reference, the extension or shortening of the telescopic end of the telescopic push rod 3 will push the rear lifting arm 5 connected thereto to rotate clockwise or counterclockwise around its own vehicle body hinge point 8. Under the connection of the connecting crossbeam 2 and the connecting shaft rod 1, all the rear lifting arms 5 will rotate around their own vehicle body hinge points 8, and drive all the front lifting arms 4 to rotate clockwise or counterclockwise around their own vehicle body hinge points 8, so that all the blade hinge points 7 are lifted or lowered, and then drive the blade 100 to rise or fall. The blade lifting mechanism only needs one telescopic push rod 3 to complete the lifting function of the blade 100. The blade lifting mechanism can be used for lifting various blades, especially the blade 100 for mowing.

[0027] Further, in this embodiment, Figures 1 to 7 As shown, there are two connecting beams 2, each of which is provided with a front lifting arm 4 and a rear lifting arm 5. The front lifting arm 4 and the rear lifting arm 5 are arranged at both ends of the connecting beam 2, that is, the beam hinge point 6 of the front lifting arm 4 is hinged to one end of the connecting beam 2, and the beam hinge point 6 of the rear lifting arm 5 is hinged to the other end of the connecting beam 2.

[0028] In this embodiment, Figures 1 to 7As shown, the connecting shaft rod 1 is provided with a rotating sleeve 9 and a positioning bearing 10, and the positioning bearings 10 are respectively arranged at both ends of the rotating sleeve 9. The outer ring of the positioning bearing 10 is coaxially fixedly connected with the end of the rotating sleeve 9, and the inner ring of the positioning bearing 10 is coaxially fixedly connected with the connecting shaft rod 1 to realize the positioning of the rotating sleeve 9, to ensure that the rotating sleeve 9 will not move along the axial direction of the connecting shaft rod 1, and at the same time to ensure the rotation of the rotating sleeve 9 on the connecting shaft rod 1. A mounting hole is provided at the vehicle body hinge point 8 of the rear lifting arm 5, and the mounting hole is sleeved and fixedly connected to the rotating sleeve 9 to realize the hinge connection between the vehicle body hinge point 8 of the rear lifting arm 5 and the connecting shaft rod 1.

[0029] Further, in this embodiment, if Figures 1 to 7 As shown, the connecting lines of the cross beam hinge point 6 and the cutter disc hinge point 7 of the front lifting arm 4 and the rear lifting arm 5 are parallel to each other. That is, the connecting line of the cross beam hinge point 6 and the cutter disc hinge point 7 of the front lifting arm 4 and the connecting line of the cross beam hinge point 6 and the cutter disc hinge point 7 of the rear lifting arm 5 are parallel to each other.

[0030] Further, in this embodiment, if Figures 1 to 7 As shown, the triangle formed by the crossbeam hinge point 6, the cutterhead hinge point 7 and the vehicle body hinge point 8 is a right triangle. The vehicle body hinge point 8 is located at a right angle, and the line connecting the crossbeam hinge point 6 and the vehicle body hinge point 8 is shorter than the line connecting the cutterhead hinge point 7 and the vehicle body hinge point 8.

[0031] In this embodiment, Figures 1 to 7 As shown, it includes a support spring 11, which is tilted, and the raised end of the support spring 11 is connected to the connecting crossbeam 2, the raised end of the support spring 11 is close to the crossbeam hinge point 6 of the front lifting arm 4, and the lowered end of the support spring 11 is connected to the mounting frame 200 of the vehicle body. The support spring 11 is used to offset part of the weight of the cutter disc 100, assist in lifting, and make the cutter disc 100 and the starting point position of the cutter disc hinge point 7 the same, that is, the output is the same when lifting. If the telescopic push rod 3 adopts an electric push rod, it can avoid excessive operating current of the motor of the electric push rod.

[0032] In this embodiment, Figures 1 to 7 As shown, the telescopic push rod 3 is tilted, the fixed end of the telescopic push rod 3 is the downward end, and the telescopic end of the telescopic push rod 3 is the upward end. That is, the telescopic push rod 3 and the support spring 11 are tilted in opposite directions.

[0033] Further, in this embodiment, if Figures 1 to 7 As shown, the fixed end of the telescopic push rod 3 is fixedly connected to the mounting frame 200 via a fixed support 13 .

[0034] Further, in this embodiment, if Figures 1 to 7 As shown, the telescopic push rod 3 can be an electric push rod, or a hydraulic push rod or a pneumatic push rod.

[0035] In this embodiment, Figures 1 to 7 As shown, two travel switches are arranged inside the telescopic push rod 3, and the travel switch combined with two diodes can realize automatic start and stop when reaching a position.

[0036] In this embodiment, Figures 1 to 7 As shown, the cutter head hinge point 7 is articulated to the cutter head 100 via an articulated support 12 .

[0037] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A cutter head lifting mechanism, characterized in that: The yoke is provided with a front lifting arm and a rear lifting arm, and the front lifting arm and the rear lifting arm are arranged front and back along the forward direction of the vehicle body; the front lifting arm and the rear lifting arm are provided with a crossbeam hinge point, a knife disc hinge point and a vehicle body hinge point arranged in a triangular shape; the crossbeam hinge point is hinged to the connecting crossbeam, the knife disc hinge point is hinged to the knife disc, the vehicle body hinge point of the front lifting arm is hinged to the mounting frame of the vehicle body, and the vehicle body hinge point of the rear lifting arm is hinged to the connecting shaft rod; the fixed end of the telescopic push rod is fixedly connected to the mounting frame of the vehicle body, the telescopic end of the telescopic push rod is fixedly connected to one of the rear lifting arms, and the fixed end of the telescopic push rod is located between the front lifting arm and the rear lifting arm.

2. A cutter head lifting mechanism according to claim 1, characterized in that: The outer sleeve of the connecting shaft rod is provided with a rotating shaft sleeve and a locating bearing, the locating bearings are arranged at both ends of the locating bearing, the outer ring of the locating bearing is fixedly connected to the rotating shaft sleeve, the inner ring of the locating bearing is fixedly connected to the connecting shaft rod, and a mounting hole is provided at the vehicle body hinge point of the rear lifting arm, and the mounting hole is sleeved and fixedly connected to the rotating shaft sleeve.

3. The cutter head lifting mechanism according to claim 1, characterized in that: The connecting lines of the crossbeam hinge points and the cutter disc hinge points of the front lifting arm and the rear lifting arm are parallel to each other.

4. The cutter head lifting mechanism according to claim 3, characterized in that: The triangle is a right triangle, the vehicle body hinge point is located at the right angle point, and the line connecting the crossbeam hinge point and the vehicle body hinge point is shorter than the line connecting the cutter disc hinge point and the vehicle body hinge point.

5. The cutter head lifting mechanism according to claim 1, characterized in that: It includes a support spring, which is tilted, the raised end of the support spring is connected to the connecting crossbeam, the raised end of the support spring is close to the crossbeam hinge point of the front lifting arm, and the lowered end of the support spring is connected to the mounting frame of the vehicle body.

6. The cutter head lifting mechanism according to claim 1, characterized in that: The telescopic push rod is arranged obliquely, the fixed end of the telescopic push rod is a downward end, and the telescopic end of the telescopic push rod is an upward end.

7. The cutter head lifting mechanism according to claim 6, characterized in that: The telescopic push rod is an electric push rod, a hydraulic push rod or a pneumatic push rod.

8. The cutter head lifting mechanism according to claim 6, characterized in that: Two travel switches are arranged inside the telescopic push rod.

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