Detection mechanism for steering angle of power machine

Abstract

A power machine steering angle detection mechanism comprises a steering fixing frame, a steering shaft, a steering wheel, a spiral column, a limiting sleeve, an angle sensor, an angle lever arm and a steering gear, a cage-shaped piece is arranged at the bottom of the steering fixing frame, the spiral column is installed in the cage-shaped piece, an inner hole of the spiral column penetrates through the steering shaft, and the steering wheel is installed in the steering gear. A main body of the angle sensor is installed on the side wall of the cage-shaped piece, a rotating shaft of the angle sensor penetrates through the side wall, the angle lever arm is installed on the rotating shaft of the angle sensor and fastened through a nut, the front end of the angle lever arm is inserted into a spiral groove of the spiral column, and when the wheel is corrected, the angle lever arm is located in the horizontal direction. According to the utility model, the angle sensor is arranged near the spiral column, and the angle lever arm on the rotating shaft of the angle sensor is inserted into the spiral groove of the spiral column, so that when the steering shaft sleeved on the spiral column rotates, after the angle sensor obtains a set rotating angle, an agricultural implement hung on the machine is automatically lifted; and the labor intensity of operators can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural machinery, and particularly relates to a detection mechanism for the steering angle of a power machine. Background Art

[0002] At present, for agricultural power machines with steering wheels, especially machines with lifting implements, when turning, the agricultural implements are lifted, and generally, the operator needs to manually operate the operating rod to lift the agricultural implements when not in operation. When the machine turns and goes straight and needs to operate, the operator then manually operates the operating rod to lower the implements for operation. It can be seen that this operation process is complex and will greatly increase the operating intensity of the driver during long-term operation. Aiming at this technical defect problem, the purpose of the utility model is to reduce the repeated and complex operations during the operation of existing agricultural machinery and reduce the labor intensity of the operator. Content of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this reason, the purpose of the utility model is to provide a detection mechanism for the steering angle of a power machine, solve the problem of detecting the turning angle during steering and then automatically lifting and lowering the agricultural implements through a control mechanism, and reduce the labor intensity of the operator.

[0004] The utility model is realized through the following technical solutions:

[0005] A detection mechanism for the steering angle of a power machine includes: a steering fixed frame, a steering shaft, a steering wheel, a spiral column, a limit sleeve, an angle sensor, an angle lever arm and a steering gear. The steering fixed frame is constructed as a hollow round tube inside, and the bottom end of the steering fixed frame is installed on the steering gear. The top and bottom ends of the steering shaft are processed with splines, and it is inserted into the internal spline hole of the steering gear through the inside of the steering fixed frame. The middle of the steering wheel is spline-connected to the top end of the steering shaft. A cage-shaped part is arranged at the bottom of the steering fixed frame, and the spiral column is installed inside the cage-shaped part. The inner hole of the spiral column passes through the steering shaft, and the two limit sleeves are installed at the bottom end of the steering shaft through the inner hole of the spiral column. The main body of the angle sensor is installed on the side wall of the cage-shaped part, and its rotating shaft passes through this side wall. The angle lever arm is installed on the rotating shaft of the angle sensor and fastened with a nut, and its front end is inserted into the spiral groove of the spiral column. When the wheels are straight ahead, the angle lever arm is horizontal.

[0006] Preferably, two parallel first flat surfaces are arranged at the bottom end of the steering shaft, two inner flat surfaces and two outer flat surfaces are respectively arranged on the inner and outer side walls of the limit sleeve in a matching manner, the two inner flat surfaces are closely attached to the two first flat surfaces of the steering shaft, two parallel second flat surfaces are arranged in the inner hole of the spiral column, and the two outer flat surfaces are closely attached to the two second flat surfaces of the spiral column.

[0007] Preferably, a conical convex portion is provided at the front end of the angle lever arm, and a spiral conical groove portion is provided at the bottom end of the spiral column, and the conical convex portion is arranged in cooperation with the spiral conical groove portion.

[0008] Preferably, a nylon sleeve is installed inside the top end of the steering fixed bracket. The top end of the steering shaft passes through the inner hole of the limit sleeve, the shaft collar is installed on the step of the steering shaft, and the snap ring is installed in the card slot of the steering shaft.

[0009] Preferably, an internal spline groove is provided in the middle of the steering wheel and is inserted and installed on the spline at the top end of the steering shaft, and is locked to the top end of the steering shaft with a locking nut.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0011] In the present utility model, by installing an angle sensor near the spiral column, the angle lever arm on its rotating shaft is inserted into the spiral groove of the spiral column. When the steering shaft sleeved on the spiral column rotates, the spiral groove drives the angle lever arm to rotate, thereby driving the rotating shaft on the angle sensor to rotate, so that after the angle sensor obtains a set rotation angle, the agricultural implement suspended by the machine can perform automatic lifting operation, which can reduce the number of mechanical operations of the driver, reduce the labor intensity of long-term operation, make the machine operation more convenient, and beginners can easily learn to operate the machine. Description of the Drawings

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0013] Figure 1 It is a structural schematic diagram of the detection mechanism for the steering angle of the power machinery of the present utility model;

[0014] Figure 2 It is Figure 1 An enlarged view of part A in

[0015] Figure 3 It is a structural schematic diagram of the installation of the steering shaft, spiral column, and limit sleeve;

[0016] Figure 4 It is a structural schematic diagram of the angle lever arm of the present utility model installed in the spiral groove of the spiral column;

[0017] Figure 5 It is a structural schematic diagram of the angle lever arm of the present utility model rotating to the extreme positions a and b (J1 and J2 are the rotation angles);

[0018] Figure 6 This is a partial cross-sectional view of the detection mechanism for the steering angle of the power machinery of the present utility model.

[0019] Among them, there are steering fixed bracket 101, cage-shaped part 1011, steering shaft 102, first flat surface 1021, steering wheel 103, screw column 104, second flat surface 1041, spiral conical groove part 1042, limit sleeve 105, inner flat surface 1051, outer flat surface 1052, angle sensor 106, angle lever arm 107, conical protrusion part 1071, nut 108, nylon sleeve 109, shaft collar 110, retaining ring 111, steering gear 112, and lock nut 113. Specific embodiments

[0020] In order to enable those skilled in the art of this technology to better understand the solution of this application, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of this application.

[0021] The technical solution of the present utility model will be further described below with reference to the accompanying drawings. Figures 1-5 There is shown a detection mechanism for the steering angle of a power machinery, including a steering fixed bracket 101, a steering shaft 102, a steering wheel 103, a screw column 104, a limit sleeve 105, an angle sensor 106, an angle lever arm 107, and a steering gear 112.

[0022] The structure of the steering fixing bracket 101 is a hollow circular tube. The bottom end of the steering fixing bracket 101 is installed on the steering gear 112. Splines are machined at both the top and bottom ends of the steering shaft 102. It is inserted into the internal spline hole of the steering gear 112 through the inside of the steering fixing bracket 101. The middle of the steering wheel 103 is spline-connected to the top end of the steering shaft 102. A cage-shaped part 1011 is arranged at the bottom of the steering fixing bracket 101. The spiral column 104 is installed inside the cage-shaped part 1011. The inner hole of the spiral column 104 passes through the steering shaft 102. Two limit sleeves 105 pass through the inner hole of the spiral column 104 and are installed at the bottom end of the steering shaft 102. The main body of the angle sensor 106 is installed on the side wall of the cage-shaped part 1011. Its rotating shaft passes through this side wall. The angle lever arm 107 is installed on the rotating shaft of the angle sensor 106 and fastened with a nut 108. Its front end is inserted into the spiral groove of the spiral column 104. When the wheels are straightened or turned back, the angle lever arm 107 is horizontal. By installing the angle sensor 106 near the spiral column 104 and inserting the angle lever arm 107 on its rotating shaft into the spiral groove of the spiral column 104, when the steering shaft installed on the spiral column 104 rotates, the spiral groove drives the angle lever arm 107 to rotate, thereby driving the rotating shaft on the angle sensor 106 to rotate, so that after the angle sensor 106 obtains the set rotation angle, the agricultural implements of the machine suspension can perform automatic lifting operations, which can reduce the mechanical operation times of the driver-operator and reduce the labor intensity of long-term operations.

[0023] In order to make the socket between the spiral column 104 and the steering shaft 102 more stable, two parallel first flat surfaces 1021 are arranged at the bottom end of the steering shaft 102. Two inner flat surfaces 1051 and two outer flat surfaces 1052 are respectively arranged on the inner and outer side walls of the limit sleeve 105. The two inner flat surfaces 1051 are closely attached to the two first flat surfaces 1021 of the steering shaft 102. Two parallel second flat surfaces 1041 are arranged in the inner hole of the spiral column 104. The two outer flat surfaces 1052 are closely attached to the two second flat surfaces 1041 of the spiral column 104. When the steering shaft 102 is rotated by the steering wheel 103, the two limit sleeves 105 are driven by the two first flat surfaces 1021 of the steering shaft 102, and then the spiral column 104 is driven to rotate by the two outer flat surfaces 1052 on the limit sleeve 105.

[0024] Regarding inserting the front end of the angle lever arm 107 into the spiral groove of the spiral column 104, as an embodiment of the present invention, specifically, as Figure 2 , a conical protrusion 1071 is arranged at the front end of the angle lever arm 107, and a spiral conical groove part 1042 is arranged at the bottom end of the spiral column 104. The conical protrusion 1071 and the spiral conical groove part 1042 are arranged in cooperation.

[0025] Inside the top end of the steering fixing bracket 101, a nylon sleeve 109 is installed. The top end of the steering shaft 102 passes through the inner hole of the limit sleeve 105, and the shaft collar 110 is installed on the step of the steering shaft 102, and the snap ring 111 is installed in the card slot of the steering shaft 102.

[0026] In the middle of the steering wheel 103, an internal spline groove is provided and inserted and installed on the spline at the top end of the steering shaft 102, and is locked at the top end of the steering shaft 102 with a locking nut 113 to fix the steering wheel 103.

[0027] The working principle of the present utility model:

[0028] Such as Figure 2 , during assembly, a conical protrusion 1071 is provided at the front end of the angle lever arm 107 and extends into a spiral conical groove portion 1042 provided on the spiral column 104. When the spiral column 104 rotates circumferentially, it will drive the angle lever arm 107 to rotate up and down. When rotating up and down, the angle sensor 106 will generate an angle value. Through the change of the angle sensor 106, the angle sensor 106 transmits the angle value to the set control mechanism. When the steering is at the set angle, the agricultural implement suspended by the machine will perform automatic lifting operation.

[0029] Such as Figure 5 , when initially installing the angle lever arm 107, it is necessary to first completely straighten the wheels of the machine. The conical protrusion 1071 provided at the front end of the angle lever arm 107 must be parallelly inserted into the spiral conical groove portion 1042 of the spiral column 104. At this time, the angle value is used as the reference value A when the machine is driving straight. When turning the steering wheel to the right, the spiral column 104 rotates clockwise to the right, and then drives the angle lever arm 107 to rotate upward. When turning to the right to the limit, the angle difference between the angle lever arm 107 and when the wheels are straight is the maximum angle value J1. On the contrary, when turning the steering wheel to the left, the spiral column 104 rotates counterclockwise to the left, and then drives the angle lever arm 107 to rotate downward. When turning to the left to the limit, the angle difference between the angle lever arm 107 and when the wheels are straight is the maximum angle value J2. According to the turning radius requirements of the machine in the field, appropriate left and right angle values are respectively selected in the upper section interval of the angle values of A-J1 and A-J2 as the agricultural implement needs to rise when the machine turns. And appropriate left and right angle values can be respectively selected in the lower section interval of the angle values of A-J1 and A-J2 as the agricultural implement needs to descend when the machine turns.

[0030] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A detection mechanism for the steering angle of a power machine, characterized in that: It includes a steering fixed bracket (101), a steering shaft (102), a steering wheel (103), a spiral column (104), a limit sleeve (105), an angle sensor (106), an angle lever arm (107) and a steering gear (112). The steering fixed bracket (101) is constructed as an inner hollow circular tube. The bottom end of the steering fixed bracket (101) is installed on the steering gear (112). Splines are machined at both the top end and the bottom end of the steering shaft (102), and it is inserted into the internal spline hole of the steering gear (112) through the inside of the steering fixed bracket (101). The middle of the steering wheel (103) is spline-connected to the top end of the steering shaft (102). A cage-shaped part (1011) is provided at the bottom of the steering fixed bracket (101). The spiral column (104) is installed inside the cage-shaped part (1011). The inner hole of the spiral column (104) passes through the steering shaft (102). The two limit sleeves (105) are installed at the bottom end of the steering shaft (102) through the inner hole of the spiral column (104). The main body of the angle sensor (106) is installed on the side wall of the cage-shaped part (1011), and its rotating shaft passes through this side wall. The angle lever arm (107) is installed on the rotating shaft of the angle sensor (106) and fastened with a nut (108). Its front end is inserted into the spiral groove of the spiral column (104). When the wheels are straight ahead, the angle lever arm (107) is horizontal.

2. The detection mechanism for the steering angle of a power machine according to claim 1, characterized in that: Two parallel first flat surfaces (1021) are provided at the bottom end of the steering shaft (102). Two inner flat surfaces (1051) and two outer flat surfaces (1052) are respectively arranged on the inner and outer side walls of the limit sleeve (105) in a matching manner. The two inner flat surfaces (1051) are closely attached to the two first flat surfaces (1021) of the steering shaft (102). Two parallel second flat surfaces (1041) are provided in the inner hole of the spiral column (104). The two outer flat surfaces (1052) are closely attached to the two second flat surfaces (1041) of the spiral column (104).

3. The detection mechanism for the steering angle of the power machinery according to claim 1, characterized in that: A conical protrusion (1071) is provided at the front end of the angle lever arm (107). A spiral conical groove part (1042) is provided at the bottom end of the spiral column (104). The conical protrusion (1071) and the spiral conical groove part (1042) are arranged in a matching manner.

4. The detection mechanism for the steering angle of the power machinery according to claim 1, wherein: A nylon sleeve (109) is installed inside the top end of the steering fixed bracket (101). The top end of the steering shaft (102) passes through the inner hole of the limit sleeve (105), and a shaft collar (110) is installed on the step of the steering shaft (102), and a retaining ring (111) is installed in the card slot of the steering shaft (102).

5. The detection mechanism for the steering angle of a power machine according to claim 1, characterized in that: An inner spline groove is provided in the middle of the steering wheel (103), and it is inserted and installed on the spline at the top end of the steering shaft (102), and is locked to the top end of the steering shaft (102) with a lock nut (113).

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