Universal agricultural machine wheel speed measuring device

Abstract

The utility model discloses a universal agricultural machine wheel speed measuring device, and belongs to the technical field of wheel speed measuring devices. Comprising the steps that a magnetic encoder is used for magnetizing multiple pieces of magnetic steel arranged on the brake disc, a magnetic resistance detection head of a magnetic resistance rotating speed sensor discontinuously detects magnetic resistance of the magnetic steel, an agricultural machine rotating speed measuring instrument can detect the magnetic resistance change, the rotating speed of the brake disc is automatically calculated according to the magnetic resistance change value, external environment interference factors on measurement are small, and the measurement accuracy is high. The device is accurate in measurement, simple in installation structure, convenient to assemble, disassemble and maintain, suitable for various agricultural environments and long in service life.

Description

Technical Field

[0001] This application relates to the technical field of wheel speed measurement devices, and more specifically, to a general-purpose agricultural machinery wheel speed measurement device. Background Art

[0002] Agricultural machinery plays a crucial role in modern agriculture, which is used to liberate labor force, improve productivity, and enhance agricultural production efficiency. It can complete tasks such as plowing, sowing, tilling, spraying, and harvesting. Wheel speed measurement is directly related to the working quality of agricultural machinery, such as fuel consumption efficiency and proportional control of product applications such as sowing, spraying, and broadcasting. A general-purpose agricultural machinery wheel speed measurement device proposed in the existing publication number CN214150771U can be directly installed on the driving wheel to directly measure the rotational speed of the driving wheel. The rotating shaft of the photoelectric encoder is coaxial with the driving wheel, making the detection sensitivity of the agricultural machinery wheel speed high and the linearity good, which is convenient for subsequent data processing. In view of the above related technologies, the utility model person believes that there are still the following defects: the wheel speed measurement device in the comparative literature uses a photoelectric encoder to measure the wheel speed. The photoelectric sensor is relatively sensitive to light conditions and environmental factors. In strong light or unstable light environments, as well as in soil and dust, it may affect the measurement accuracy, with high input costs and low practicability. In view of this, we propose a general-purpose agricultural machinery wheel speed measurement device. Summary of the Utility Model

[0003] 1. Technical Problems to be Solved

[0004] The purpose of this application is to provide a general-purpose agricultural machinery wheel speed measurement device, which solves the technical problems in the above background art that the wheel speed measurement device in the comparative literature uses a photoelectric encoder to measure the wheel speed, the photoelectric sensor is relatively sensitive to light conditions and environmental factors, in strong light or unstable light environments, as well as in soil and dust, it may affect the measurement accuracy, with high input costs and low practicability. It realizes the magnetization treatment of multiple magnetic steels arranged on the brake disc by using a magnetic encoder. The magnetic resistance detection head of the magnetic resistance rotational speed sensor intermittently detects the magnetic resistance of the magnetic steel, enabling the agricultural machinery rotational speed measuring instrument to detect the magnetic resistance change. Based on the magnetic resistance change value, the rotational speed of the brake disc is automatically calculated. The measurement is less affected by external environmental interference factors, with high measurement accuracy, and the installation structure is simple, facilitating assembly, disassembly, and maintenance, adapting to various agricultural environments, and having a long service life.

[0005] 2. Technical Solution

[0006] The technical solution of this application provides a general agricultural machinery wheel speed measuring device, which includes: a magnetoresistive speed measuring mechanism. The magnetoresistive speed measuring mechanism includes a protective shell, on which a magnetoresistive speed sensor is installed by threading. A magnetoresistive detection head is slidably installed in the magnetoresistive speed sensor. The magnetoresistive speed sensor is electrically connected to a socket, a plug is inserted into the socket, the plug is electrically connected to a data cable, and the data cable is electrically connected to an agricultural machinery speed measuring instrument. The protective shell is threadedly connected to a magnetic encoder and a mounting seat. The mounting seat includes a bearing, four connecting arms are fixedly provided on the bearing, a main shaft is fixedly sleeved in the bearing, the main shaft is drivingly connected to a brake disc and a wheel hub, the brake disc and the wheel hub are threadedly connected, and the magnetic encoder is electrically connected to an agricultural machinery speed measuring power supply circuit.

[0007] By adopting the above technical solution, the wheel speed measuring device is composed of a magnetoresistive speed measuring mechanism and a magnetic encoder. Among them, the magnetoresistive speed measuring mechanism is composed of a magnetoresistive speed sensor and a protective shell. The magnetoresistive speed sensor is installed in the protective shell by threading, and the protective shell is threadedly connected to the magnetic encoder and the mounting seat. The mounting seat is rotationally connected to the main shaft through a bearing and is limit-fixedly connected to the vehicle frame through two connecting arms, so that both the protective shell and the magnetic encoder are installed in a limited way. The main shaft drives the wheel hub and the brake disc to rotate, and the magnetic encoder is used to magnetize the brake disc. The magnetoresistive detection head of the magnetoresistive speed sensor intermittently detects the magnetic resistance, forcing the magnetoresistive detection head to displace along the inside of the magnetoresistive speed sensor and deforming the built-in sensitive spring, enabling the agricultural machinery speed measuring instrument to detect the change in magnetic resistance, and then calculating the rotational speed of the wheel hub based on the change value of the magnetic resistance. This wheel speed measuring device can be directly installed on the driving main shaft of the agricultural machinery, and the magnetoresistive speed sensor is used to directly measure the rotational speed of the brake disc. The measurement is less affected by external environmental interference factors, has high measurement accuracy, long service life, and a simple installation structure, which is convenient for assembly, disassembly and maintenance.

[0008] Optionally, a plurality of first bolts are installed by threading between the wheel hub and the brake disc. A plurality of magnetic steels are fixedly provided on the brake disc along the circumference. A magnetic encoding circuit and a radially magnetized strong magnet are arranged in the magnetic encoder, and the magnetic encoder is powered on to magnetize the magnetic steels.

[0009] By adopting the above technical solution, the main shaft can drive the wheel hub and the brake disc to rotate together to achieve the purpose of agricultural machinery movement. The magnetic encoding circuit and the radially magnetized strong magnet in the magnetic encoder can be used to magnetize the plurality of magnetic steels installed on the brake disc.

[0010] Optionally, a plurality of screw blocks are fixedly provided on the housing of the magnetic encoder. A plurality of second bolts are installed by threading on the protective shell, and the second bolts are threadedly installed in the screw blocks. A plug hole is opened in the magnetic encoder, and the magnetoresistive speed sensor is movably inserted into the plug hole.

[0011] By adopting the above technical solution, the magnetic encoder and the protective shell are threadedly connected to two connecting arms in the mounting seat through the second bolts, and the other two connecting arms are threadedly installed on the agricultural machinery frame through bolts, so as to achieve the purpose of limiting the installation of the mounting seat.

[0012] Optionally, a rubber gasket is detachably installed on the bottom surface of the protective shell, and the bottom surface of the rubber gasket is attached to the upper surface of the magnetic encoder.

[0013] By adopting the above technical solution, when the protective shell is threadedly installed on the magnetic encoder, buffer protection treatment is realized between the protective shell and the magnetic encoder through the rubber gasket.

[0014] Optionally, a screw hole is provided at one end of the connecting arm, and the connecting arm is threadedly connected to the second bolt through the screw hole.

[0015] By adopting the above technical solution, the mounting seat is rotationally connected to the main shaft through a bearing, the magnetic encoder and the protective shell are threadedly connected through two connecting arms, and the other two connecting arms are threadedly installed on the agricultural machinery frame through bolts.

[0016] 3. Beneficial effects

[0017] One or more of the technical solutions provided in the technical solution of the present application have at least the following technical effects or advantages: by magnetizing a plurality of magnetic steels arranged on the brake disc by using a magnetic encoder, the magnetic resistance detection head of the magnetoresistive speed sensor intermittently detects the magnetic resistance of the magnetic steel, so that the agricultural machinery speed measuring instrument can detect the change of the magnetic resistance, and automatically calculates the speed of the brake disc according to the change value of the magnetic resistance. The measurement is less affected by external environmental interference factors, the measurement is accurate, the installation structure is simple, it is convenient for assembly and disassembly and maintenance, it is suitable for various agricultural environments, and it has a long service life. Brief description of the drawings

[0018] Figure 1 It is a schematic diagram of the overall structure of a general agricultural machinery wheel speed measuring device disclosed in a preferred embodiment of the present application;

[0019] Figure 2 It is a schematic diagram of the structure of the mounting seat of a general agricultural machinery wheel speed measuring device disclosed in a preferred embodiment of the present application;

[0020] Figure 3 It is a schematic diagram of the structure of the magnetic encoder and the magnetoresistive speed measuring mechanism of a general agricultural machinery wheel speed measuring device disclosed in a preferred embodiment of the present application;

[0021] Description of reference numerals in the figure: 1, wheel hub; 12, brake disc; 121, permanent magnet; 13, first bolt; 2, main shaft; 3, mounting seat; 31, bearing; 32, connecting arm; 321, screw hole; 4, magnetic encoder; 41, screw block; 42, insertion hole; 5, magnetoresistive speed measurement mechanism; 51, protective shell; 511, second bolt; 52, magnetoresistive speed sensor; 521, magnetoresistive detection head; 522, socket; 53, plug; 531, data cable; 54, rubber gasket. Detailed implementation mode

[0022] The present application will be further described in detail below with reference to the accompanying drawings of the specification.

[0023] Referring to Figures 1 to 3 , an embodiment of the present application provides a general agricultural machinery wheel speed measurement device, including: a magnetoresistive speed measurement mechanism 5, the magnetoresistive speed measurement mechanism 5 includes a protective shell 51, a magnetoresistive speed sensor 52 is threadedly installed on the protective shell 51, a magnetoresistive detection head 521 is slidably installed in the magnetoresistive speed sensor 52, the magnetoresistive speed sensor 52 is electrically connected to a socket 522, a plug 53 is inserted and installed in the socket 522, the plug 53 is electrically connected to a data cable 531, the data cable 531 is electrically connected to an agricultural machinery speed measurement instrument, the protective shell 51 is threadedly connected to a magnetic encoder 4 and a mounting seat 3, the mounting seat 3 includes a bearing 31, four connecting arms 32 are fixedly arranged on the bearing 31, a main shaft 2 is fixedly sleeved in the bearing 31, the main shaft 2 is drivingly connected to a brake disc 12 and a wheel hub 1, the brake disc 12 and the wheel hub 1 are threadedly connected, the magnetic encoder 4 is electrically connected to an agricultural machinery speed measurement power supply circuit, the wheel speed measurement device is composed of a magnetoresistive speed measurement mechanism 5 and a magnetic encoder 4, wherein the magnetoresistive speed measurement mechanism 5 is composed of a magnetoresistive speed sensor 52 and a protective shell 51, the magnetoresistive speed sensor 52 is threadedly installed in the protective shell 51, and the protective shell 51 is threadedly connected to the magnetic encoder 4 and the mounting seat 3. The mounting seat 3 is rotatably connected to the main shaft 2 through a bearing 31 and is limit fixedly connected to the vehicle frame through two connecting arms 32, so that the protective shell 51 and the magnetic encoder 4 are both limit installed. The main shaft 2 drives the wheel hub 1 and the brake disc 12 to rotate, the brake disc 12 is magnetized by the magnetic encoder 4, the magnetoresistive detection head 521 of the magnetoresistive speed sensor 52 intermittently detects the magnetic resistance, so that the magnetoresistive detection head 521 is forced to displace inside the magnetoresistive speed sensor 52, and the built-in sensitive spring deforms, so that the agricultural machinery speed measurement instrument can detect the change of magnetic resistance, and then calculate the rotation speed of the wheel hub 1 according to the change value of magnetic resistance. The wheel speed measurement device can be directly installed on the agricultural machinery drive main shaft 2, and the rotation speed of the brake disc 12 is directly measured by the magnetoresistive speed sensor 52. The measurement is less affected by external environmental interference factors, has high measurement accuracy, long service life, and a simple installation structure, which is convenient for assembly, disassembly and maintenance.

[0024] Referring to Figure 1 andFigure 2 , a plurality of first bolts 13 are installed between the hub 1 and the brake disc 12 by threads. A plurality of magnets 121 are fixedly arranged on the brake disc 12 along the circumference. A magnetic encoding circuit and a radially magnetized strong magnet are arranged in the magnetic encoder 4. The magnetic encoder 4 is energized to magnetize the magnets 121. The main shaft 2 can drive the hub 1 and the brake disc 12 to rotate together to achieve the purpose of moving the agricultural machine. The magnetic encoding circuit and the radially magnetized strong magnet in the magnetic encoder 4 can be used to magnetize the plurality of magnets 121 installed on the brake disc 12.

[0025] Refer to Figure 2 and Figure 3 , a plurality of screw blocks 41 are fixedly arranged on the housing of the magnetic encoder 4. A plurality of second bolts 511 are installed on the protective housing 51 by threads. The second bolts 511 are installed in the screw blocks 41 by threads. A plug hole 42 is formed in the magnetic encoder 4. A magnetoresistive speed sensor 52 is movably inserted into the plug hole 42. The magnetic encoder 4 and the protective housing 51 are threadedly connected to two connecting arms 32 in the mounting seat 3 by the second bolts 511. The other two connecting arms 32 are threadedly installed on the agricultural machine frame by bolts to achieve the purpose of limiting the installation of the mounting seat 3.

[0026] Refer to Figure 2 and Figure 3 , a rubber gasket 54 is detachably installed on the bottom surface of the protective housing 51. The bottom surface of the rubber gasket 54 is attached to the upper surface of the magnetic encoder 4. When the protective housing 51 is threadedly installed on the magnetic encoder 4, a buffer protection treatment is realized between the protective housing 51 and the magnetic encoder 4 through the rubber gasket 54.

[0027] Refer to Figure 2 and Figure 3 , one end of the connecting arm 32 is provided with a screw hole 321. The connecting arm 32 is threadedly connected to the second bolt 511 through the screw hole 321. The mounting seat 3 is rotatably connected to the main shaft 2 through a bearing 31. The magnetic encoder 4 and the protective housing 51 are threadedly connected through the two connecting arms 32. The other two connecting arms 32 are threadedly installed on the agricultural machine frame by bolts.

[0028] Working principle: The wheel speed measuring device consists of a magnetoresistive speed measuring mechanism 5 and a magnetic encoder 4. The magnetoresistive speed measuring mechanism 5 is composed of a magnetoresistive speed sensor 52 and a protective housing 51. The magnetoresistive speed sensor 52 is threadedly installed inside the protective housing 51, and the protective housing 51 is threadedly connected to the magnetic encoder 4 and the mounting seat 3. The mounting seat 3 is rotatably connected to the main shaft 2 through a bearing 31 and is fixedly connected to the vehicle frame through two connecting arms 32 for limit, so that the protective housing 51 and the magnetic encoder 4 are both installed in a limited manner. The main shaft 2 drives the hub 1 and the brake disc 12 to rotate. The magnetic encoder 4 magnetizes multiple magnets 121 on the brake disc 12. The magnetoresistive detection head 521 of the magnetoresistive speed sensor 52 intermittently detects the magnetic resistance of the magnet 121, causing the magnetoresistive detection head 521 to be forced to displace inside the magnetoresistive speed sensor 52 and deforming the built-in sensitive spring, enabling the agricultural machinery speed measuring instrument to detect the magnetoresistance change. Then, based on the magnetoresistance change value, the rotation speed of the hub 1 is calculated. This wheel speed measuring device can be directly installed on the drive main shaft 2 of the agricultural machinery, and the rotation speed of the brake disc 12 can be directly measured using the magnetoresistive speed sensor 52. The measurement is less affected by external environmental interference factors, with high measurement accuracy, long service life, and a simple installation structure, facilitating assembly, disassembly, and maintenance.

Claims

1. A general agricultural machinery wheel speed measuring device, characterized in that: Comprising: a magnetoresistive rotational speed measuring mechanism (5), the magnetoresistive rotational speed measuring mechanism (5) includes a protective housing (51), a magnetoresistive rotational speed sensor (52) is threadedly mounted on the protective housing (51), a magnetoresistive detection head (521) is slidably mounted in the magnetoresistive rotational speed sensor (52), the magnetoresistive rotational speed sensor (52) is electrically connected to a plug socket (522), a plug (53) is inserted and mounted in the plug socket (522), the plug (53) is electrically connected to a data line (531), the data line (531) is electrically connected to an agricultural machinery rotational speed measuring instrument, the protective housing (51) is threadedly connected to a magnetic encoder (4) and a mounting seat (3), the mounting seat (3) includes a bearing (31), four connecting arms (32) are fixedly provided on the bearing (31), a main shaft (2) is fixedly sleeved in the bearing (31), the main shaft (2) is drivingly connected to a brake disc (12) and a wheel hub (1), the brake disc (12) and the wheel hub (1) are threadedly connected, and the magnetic encoder (4) is electrically connected to an agricultural machinery rotational speed measuring power supply circuit.

2. The general agricultural machinery wheel speed measuring device according to claim 1, characterized in that: A plurality of first bolts (13) are threadedly mounted between the wheel hub (1) and the brake disc (12), a plurality of magnetic steel (121) are fixedly provided on the brake disc (12) along the circumference, a magnetic encoding circuit and a radially magnetized strong magnet are provided in the magnetic encoder (4), and the magnetic encoder (4) is energized to magnetize the magnetic steel (121).

3. The general agricultural machinery wheel speed measuring device according to claim 1, characterized in that: A plurality of screw blocks (41) are fixedly provided on the housing of the magnetic encoder (4), a plurality of second bolts (511) are threadedly mounted on the protective housing (51), the second bolts (511) are threadedly mounted in the screw blocks (41), a plug hole (42) is formed in the magnetic encoder (4), and the magnetoresistive rotational speed sensor (52) is movably inserted into the plug hole (42).

4. A general agricultural machinery wheel speed measuring device according to claim 1, characterized in that: A rubber gasket (54) is detachably mounted on the bottom surface of the protective housing (51), and the bottom surface of the rubber gasket (54) is in close contact with the upper surface of the magnetic encoder (4).

5. The general agricultural machinery wheel speed measuring device according to claim 3, characterized in that: One end of the connecting arm (32) is provided with a screw hole (321), and the connecting arm (32) is threadedly connected to the second bolt (511) through the screw hole (321).

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