Electric control lifting system of tractor

Abstract

The utility model discloses an electric control lifting system of a tractor, which belongs to the technical field of tractors and comprises a controller and a lifter, the lifter is communicated with an oil tank through an oil pump and comprises an electromagnetic directional valve and a lifting oil cylinder which are communicated with the oil pump through pipelines, and a detection unit used for detecting the lifting height of a piston rod is arranged in the lifting oil cylinder. The detection unit is electrically connected with the controller, the sensor is arranged in the lifting oil cylinder and is not interfered by the outside, the ascending and descending heights of the lifter can be accurately and safely measured, the consequences of insensitivity, failure and the like of a transmission mechanism are avoided, and an agricultural implement can accurately and quickly ascend and descend.

Description

Technical Field

[0001] The utility model belongs to the technical field of tractors, and in particular relates to an electric-controlled lifting system for a tractor. Background Art

[0002] With the development of my country's economy and technology, electric control and intelligence are gradually applied to tractors, so electric hydraulic lifters are gradually used. The position control of electric hydraulic lifters on traditional tractors is achieved by installing position sensors around the lifting arms to control the lifting or lowering height of the lifter. Since this structure is exposed outside the lifter, it is easily disturbed by external factors, such as rain, atmosphere, and external interference, which will cause the sensor and its transmission mechanism to be insensitive and fail. In order to solve these problems and accurately and safely control the lifting and lowering accuracy of the lifter, this application proposes a tractor electric lifting system. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a tractor electric control lifting system, in which the sensor will not be disturbed by the outside world, and can accurately and safely measure the rising and falling heights of the lifter, thus avoiding the consequences of insensitivity and failure of the transmission mechanism.

[0004] In order to solve the above technical problems, the technical solution of the utility model is:

[0005] A tractor electric lifting system comprises a controller and a lifter, wherein the lifter is connected to an oil tank via an oil pump, the lifter comprises an electromagnetic reversing valve and a lifting cylinder connected to the oil pump via a pipeline, a detection unit for detecting the lifting height of a piston rod is arranged in the lifting cylinder, and the detection unit is electrically connected to the controller.

[0006] Furthermore, the detection unit is a travel sensor.

[0007] Furthermore, the stroke sensor includes a measuring rod and a sensing block, the measuring rod is arranged along the axial direction of the lifting cylinder, the sensing block is slidably mounted on the outer side of the measuring rod, and the sensing block is fixed to the piston rod.

[0008] Furthermore, a cavity is opened axially of the piston rod, and a mounting groove connecting the cavity and the rodless cavity of the lifting cylinder is opened at the bottom of the piston rod. One end of the measuring rod is fixed to the bottom of the rodless cavity and the other end extends into the cavity, and the sensing block is fixed in the mounting groove.

[0009] Furthermore, a sealing ring is arranged in the installation groove, and the sealing ring is arranged between the sensing block and the piston rod in a radial direction.

[0010] Furthermore, the piston rod is provided with a locking block which is covered at the opening of the mounting groove, the locking block is sleeved on the outer side of the measuring rod, and the locking block is fixed to the bottom of the piston rod by bolts.

[0011] Furthermore, a wire-passing channel is provided at the bottom of the lifting cylinder, a data transmission line of the stroke sensor extends from the wire-passing channel and is electrically connected to the controller, and an end of the stroke sensor is sealed and fixed to an opening at one end of the wire-passing channel.

[0012] After adopting the above technical solution, the beneficial effects of the utility model are:

[0013] Since the tractor electric-controlled lifting system of the utility model includes a controller and a lifter, the lifter is connected to the oil tank through an oil pump, the lifter includes an electromagnetic reversing valve and a lifting cylinder connected to the oil pump through a pipeline, a detection unit for detecting the lifting height of the piston rod is arranged in the lifting cylinder, the detection unit is electrically connected to the controller, and the sensor is arranged inside the lifting cylinder and will not be disturbed by the outside world. The lifting and lowering heights of the lifter can be measured accurately and safely, avoiding the consequences of insensitivity and failure of the transmission mechanism, so that the agricultural implement can be lifted and lowered accurately and quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the electric-controlled lifting system of the tractor of the utility model;

[0015] Figure 2 It is a schematic diagram of the internal structure of the lifting cylinder;

[0016] In the figure, 1-tractor, 2-oil tank, 3-oil pump, 4-controller, 5-electromagnetic reversing valve, 6-lifting cylinder, 610-cylinder body, 611-wire passage, 620-piston rod, 621-cavity, 622-mounting groove, 623-sealing ring, 624-locking block, 630-stroke sensor, 631-measuring rod, 632-sensing block, 633-data transmission line, 7-lifting arm, 8-farm implement. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the protection scope of the present invention.

[0018] like Figure 1 and Figure 2As shown together, a tractor electric control lifting system includes a controller 4 and a lifter arranged on a tractor 1, the lifter is connected to an oil tank 2 through an oil pump 3, the lifter includes an electromagnetic reversing valve 5 and a lifting cylinder 6 connected to the oil pump 3 through a pipeline, a detection unit for detecting the lifting height of a piston rod 620 is arranged in the lifting cylinder 6, and the detection unit is electrically connected to the controller 4. In the figure, the dotted line is a circuit, and the dotted line is an oil circuit.

[0019] The detection unit is arranged inside the lifting cylinder 6 and will not be disturbed by the outside world. It can accurately and safely measure the rising and falling heights of the lifter. The controller 4, i.e., the ECU of the tractor 1, can directly or indirectly calculate the actual lifting height of the lifter according to the measurement value of the detection unit, and control the oil supply of the lifting cylinder 6 by controlling the opening of the electromagnetic reversing valve 5 so that the actual lifting height of the lifter reaches the target set height, and the lifting arm 7 and the lower pull rod of the transmission mechanism drive the agricultural implement 8 to rise and fall accurately and quickly.

[0020] like Figure 2 As shown, the detection unit is a stroke sensor 630, which specifically includes a measuring rod 631 and a sensing block 632. The measuring rod 631 is arranged along the axial direction of the lifting cylinder 6, and the sensing block 632 is slidably mounted on the outer side of the measuring rod 631, and the sensing block 632 is fixed to the piston rod 620.

[0021] Specifically, a cavity 621 is axially opened in the piston rod 620, and a mounting groove 622 connecting the cavity 621 and the rodless cavity of the lifting cylinder 6 is opened at the bottom of the piston rod 620. One end of the measuring rod 631 is fixed to the bottom of the rodless cavity and the other end extends into the cavity 621. The sensing block 632 is fixed in the mounting groove 622.

[0022] Furthermore, a sealing ring 623 is provided in the mounting groove 622 , and the sealing ring 623 is provided between the sensing block 632 and the piston rod 620 in the radial direction to achieve sealing between the rodless cavity and the cavity 621 , thereby preventing hydraulic oil from entering the cavity 621 and affecting the movement of the piston rod 620 and the recognition of the sensing block 632 .

[0023] The piston rod 620 is provided with a locking block 624 which is covered at the opening of the mounting groove 622. The locking block 624 is mounted on the outer side of the measuring rod 631. The locking block 624 is fixed to the bottom of the piston rod 620 by bolts. The locking block 624 presses the sealing ring 623 to ensure the seal and fixation of the sensing block 632, thereby preventing the sensing block 632 from moving relative to the piston rod 620 and causing insufficient measurement accuracy.

[0024] A wire-passing channel 611 is provided at the bottom of the cylinder body 610 of the lifting cylinder 6, and a data transmission line 633 of the stroke sensor 630 extends out from the wire-passing channel 611, which is convenient for electrical connection with the controller 4. The end of the stroke sensor 630 is sealed and fixed to an opening at one end of the wire-passing channel 611, which can prevent oil leakage from the lifting cylinder 6 and realize the isolation of the data transmission line 633 of the stroke sensor 630 from the hydraulic oil.

[0025] The utility model discloses an electric-controlled lifting system for a tractor, by arranging a stroke sensor in the lifting oil cylinder, so as to detect the lifting height of the piston rod. The measured value is the actual lifting height of the lifter. The electromagnetic reversing valve is controlled so that the actual lifting height of the lifter reaches the target set height. The sensor is arranged inside the lifting oil cylinder and will not be disturbed by the outside world. The lifting and descending heights of the lifter can be measured accurately and safely, so as to avoid the consequences of insensitivity and failure of the transmission mechanism, so that the agricultural implement can be lifted and lowered accurately and quickly.

[0026] In the description of this specification, it should be understood that the descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] In the description of this specification, unless otherwise clearly defined, words such as "setting", "installation", and "connection" should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meaning of the above words in this utility model based on the specific content of the technical solution.

[0028] Although the specific implementation methods of the utility model are described above, those skilled in the art should understand that the described embodiments are only part of the implementation methods of the utility model, rather than all the implementation methods, which are only examples, and the protection scope of the utility model is defined by the claims. Those skilled in the art can make various changes or modifications to these implementation methods without departing from the principle and essence of the utility model and without any creative work, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. A tractor electric lifting system, comprising a controller and a lifter, wherein the lifter is connected to an oil tank through an oil pump, and the lifter comprises an electromagnetic reversing valve and a lifting oil cylinder connected to the oil pump through a pipeline, wherein: A detection unit for detecting the lifting height of the piston rod is arranged in the lifting cylinder, and the detection unit is electrically connected to the controller.

2. The tractor electric lifting system according to claim 1, characterized in that: The detection unit is a travel sensor.

3. The tractor electric lifting system according to claim 2, characterized in that: The stroke sensor comprises a measuring rod and a sensing block, wherein the measuring rod is arranged along the axial direction of the lifting cylinder, the sensing block is slidably sleeved on the outer side of the measuring rod, and the sensing block is fixed to the piston rod.

4. The tractor electric lifting system according to claim 3, characterized in that: A cavity is opened axially in the piston rod, and an installation groove connecting the cavity and the rodless cavity of the lifting cylinder is opened at the bottom of the piston rod. One end of the measuring rod is fixed to the bottom of the rodless cavity and the other end extends into the cavity. The sensing block is fixed in the installation groove.

5. The tractor electric lifting system according to claim 4, characterized in that: A sealing ring is arranged in the installation groove, and the sealing ring is arranged between the sensing block and the piston rod in a radial direction.

6. The tractor electric lifting system according to claim 5, characterized in that: The piston rod is provided with a locking block which is covered at the opening of the mounting groove. The locking block is sleeved on the outer side of the measuring rod and is fixed to the bottom of the piston rod by bolts.

7. The tractor electric lifting system according to any one of claims 2 to 6, characterized in that: A wire-passing channel is provided at the bottom of the lifting oil cylinder, a data transmission line of the stroke sensor extends out of the wire-passing channel, and an end of the stroke sensor is sealed and fixed to an opening at one end of the wire-passing channel.

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