Telescopic rear axle with variable wheel tread

Abstract

The utility model relates to the technical field of agricultural machinery, in particular to a wheel track variable telescopic rear axle which comprises a fixed arm (100), a telescopic arm (200) and a wheel body (300). One end of the telescopic arm (200) is fixedly connected with the wheel body (300), the other end of the telescopic arm (200) is slidably connected with the fixed arm (100), and a telescopic driving module (400) is connected between the fixed arm (100) and the telescopic arm (200). The fixed arm (100) is tubular, and the telescopic arm (200) is inserted into a tubular cavity of the fixed arm (100). The wheel distance of the frame rear axle is adjusted through the telescopic driving module in the wheel rotating process, the application range of the agricultural machine is widened, the use cost of the agricultural machine is reduced, and the agricultural cultivation efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural machinery, and specifically to a telescopic rear axle with variable wheelbase. Background Art

[0002] With the continuous development of agricultural production mechanization, the types of agricultural machinery and equipment applicable to various crop tillages and various tillage terrains are increasing and the classification is becoming more and more detailed, that is, agricultural machinery of various functional specifications can meet different tillage requirements. However, general agricultural machinery is currently relatively specialized and highly targeted agricultural equipment. During the tillage process, the areas served by the machinery may be very vast. Therefore, the crop row spacings of different crops in different farms may be different. Equipping corresponding agricultural machinery for each row spacing not only increases the tillage cost but also increases the maintenance cost of the agricultural machinery. Therefore, it has become an urgent requirement to design a telescopic rear axle for agricultural machinery with adjustable wheelbase that can be applicable to different row spacings. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: to design a telescopic rear axle for agricultural machinery with adjustable wheelbase.

[0004] The technical solution for the technical problem to be solved by the present invention is: a telescopic rear axle with variable wheelbase, including a fixed arm, a telescopic arm and a wheel body; one end of the telescopic arm is fixedly connected to the wheel body, and the other end is slidably connected to the fixed arm, and a telescopic driving module is connected between the fixed arm and the telescopic arm.

[0005] Preferably, the fixed arm is tubular, the telescopic arm is columnar, and the telescopic arm is inserted into the lumen of the fixed arm.

[0006] Preferably, there are three fixed arms, and the three fixed arms are arranged in a triangle and are fixedly connected by connecting blocks. Correspondingly, there are three telescopic arms, and the ends of the three telescopic arms are fixedly connected to the upper support fixing seat.

[0007] Preferably, the surface of the telescopic arm is provided with a groove whose length direction is the same as the axis direction of the telescopic arm.

[0008] Preferably, the telescopic driving module is arranged on the lower fixed arm.

[0009] Preferably, the telescopic driving module is an oil cylinder, the cylinder body of the oil cylinder is connected to the fixed arm, and the free end of the telescopic shaft of the oil cylinder is hingedly connected to the end of the telescopic arm.

[0010] Preferably, the wheel body includes a leg, a lower support fixing seat and a wheel, the upper part of the leg is connected to the upper support fixing seat, the lower part of the leg is connected to the lower support fixing seat, and the lower end of the lower support fixing seat is connected to the wheel.

[0011] Preferably, a wheel driving module is installed at the lower end of the lower support seat, and the wheel driving module drives the wheels to rotate.

[0012] Preferably, the wheel driving module is a hydraulic motor.

[0013] The beneficial effects of the present invention are as follows: By providing a rear axle of the frame with adjustable wheelbase, the applicable range of agricultural machinery can be increased, the use cost of agricultural machinery can be reduced, and the agricultural cultivation efficiency can be improved. Description of the Drawings

[0014] Figure 1 It is a schematic diagram of an embodiment of the present utility model.

[0015] Figure 2 It is a schematic diagram of one end of the present utility model being extended.

[0016] Figure 3 It is a schematic diagram of both ends of the present utility model being extended.

[0017] Figure 4 It is a schematic diagram of the telescopic arm of an embodiment of the present utility model.

[0018] In the figure: 100, fixed arm; 200, telescopic arm; 300, wheel body; 400, telescopic drive module; 210, upper support seat; 310, leg; 320, lower support seat; 330, hydraulic hub motor; 340, wheel. Detailed Embodiments

[0019] To make the technical solutions and beneficial effects of the present invention clearer, the following further elaborates on the embodiments of the present invention.

[0020] A telescopic rear axle with variable wheelbase includes a fixed arm 100, a telescopic arm 200, and a wheel body 300. A telescopic rear axle disclosed in the present utility model can be used as a front axle in practical applications. One end of the telescopic arm 200 is fixedly connected to the wheel body 300, and the other end of the telescopic arm 200 is slidably connected to the fixed arm 100. A telescopic drive module 400 is connected between the fixed arm 100 and the telescopic arm 200. The telescopic drive module 400 is used to control the telescopic arm 200 to extend or retract, thereby realizing the adjustment of the wheelbase between the left and right wheels.

[0021] In this embodiment, the fixed arm 100 is tubular, which can be a round tube, a square tube, a triangular tube, etc. The telescopic arm 200 is columnar or tubular, and the cross-sectional shape of the telescopic arm 200 matches the cross-sectional shape of the lumen of the fixed arm 100. The telescopic arm 200 is inserted into the lumen of the fixed arm 100 and can slide in the lumen.

[0022] As shown in the figure, in order to increase the stability and load-bearing capacity of the rear axle, three fixed arms 100 are provided. The three fixed arms 100 are arranged in parallel and in a triangular pattern. As shown in the figure, in order to increase stability and firmness, the three fixed arms 100 are fixedly connected by connecting blocks. In this embodiment, the three fixed arms 100 include two upper circular tube fixed arms 100 and one lower square tube fixed arm 100. Connecting blocks are arranged at intervals between the two upper fixed arms 100 to achieve connection and fixation. At the same time, connecting blocks are arranged at both ends to connect the three fixed arms 100. In order to achieve the installation with agricultural machinery, a connecting plate is provided on the upper part of the fixed arm 100, and connecting through holes are provided on the connecting plate, through which connection with the main body of the agricultural machinery can be achieved by bolts. In order not to affect the installation of the main body of the agricultural machinery, the telescopic drive module 400 is arranged on the lower fixed arm 100. The telescopic drive module 400 is an oil cylinder, the cylinder body of the oil cylinder is connected to the fixed arm 100, and the free end of the telescopic shaft of the oil cylinder is hinged to the end of the telescopic arm 200. In this embodiment, three fixed arms 100 are provided, and correspondingly three telescopic arms 200 are provided. The ends of the three telescopic arms 200 are fixedly connected to the upper support fixing seat 210 as shown in the figure. At this time, the free end of the telescopic shaft of the oil cylinder is connected to the upper support fixing seat 210 that fixes the three telescopic arms 200. As shown in the figure, the free end of the telescopic shaft is hinged to the upper support fixing seat 210. The cylinder body at the other end is also hinged to the lower fixed arm 100.

[0023] In addition to applying hydraulic cylinders, electric telescopic cylinders and electric telescopic rods can also be used as the telescopic drive module.

[0024] In order to reduce the friction during the telescopic process, increase the strength of the telescopic arm 200, and save material costs, grooves with the same length direction as the axis direction of the telescopic arm 200 are provided on the surface of the telescopic arm 200.

[0025] The wheel body 300 includes legs 310, a lower support fixing seat 320, and a wheel 340. The upper part of the leg 310 is connected to the upper support fixing seat 210. The lower part of the leg 310 is connected to the lower support fixing seat 320. The lower end of the lower support fixing seat 320 is connected to the wheel 340. The rear axle or the front axle in this embodiment is applicable to four-wheel drive agricultural machinery equipment. A wheel drive module is installed at the lower end of the lower support fixing seat 320, and the wheel drive module drives the wheel 340 to rotate. In this embodiment, in unity with the telescopic drive module 400, the wheel drive module adopts a hydraulic motor 330. As shown in the figure, in this embodiment, the leg 310 is columnar. The lower support fixing seat 320 is concave and opens outward. As shown in the figure, the main shape of the lower support fixing seat 320 is a semi-rectangular frame and opens outward. The upper end of the lower support fixing seat 320 is fixedly connected to the leg 310 or rotatably connected to the leg 310 through a bearing. The upper support fixing seat 210 includes an angular frame sleeved and fixedly connected to the leg 310. One side of the angular frame is fixedly connected to the panel of the plate-like structure, and the panel is fixedly connected to the end of the telescopic arm 200.

[0026] When adjusting the wheelbase, it is necessary to do so while the wheels are rotating. To avoid misoperation, a locking mechanism is provided between the wheel drive system and the telescopic control system. When using a hydraulic cylinder or a hydraulic motor. The normally open contact of the hydraulic motor drive switch is connected in series in the drive control circuit of the hydraulic cylinder. When the agricultural machinery is moving, the normally open contact is closed. After the drive switch in the control circuit of the hydraulic cylinder of the telescopic drive module 400 is closed, the two series-connected switches are closed simultaneously to start the adjustment of the wheelbase. When the agricultural machinery is stationary, the normally open contact is in the open state. At this time, even if the start switch of the hydraulic cylinder in the telescopic drive module is pressed, the wheelbase adjustment will not be started, thus protecting the overall telescopic rear axle.

[0027] As Figure 2 shown, the present utility model can be telescoped only at one end, or as Figure 3 shown, telescopic control can be performed at both ends. Therefore, the present utility model can have a wider adjustment range.

[0028] In summary, it is only a preferred embodiment of the present invention and is not used to limit the scope of the present invention. Through the above description, relevant staff can make various changes and modifications completely within the scope without departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification. All equivalent changes and modifications in terms of the shape, structure, features, and spirit described in the claims of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A telescopic rear axle with variable wheelbase, characterized in that: It includes a fixed arm (100), a telescopic arm (200) and a wheel body (300); One end of the telescopic arm (200) is fixedly connected to the wheel body (300), and the other end is slidably connected to the fixed arm (100). A telescopic drive module (400) is connected between the fixed arm (100) and the telescopic arm (200).

2. The telescopic rear axle with variable wheelbase according to claim 1, characterized in that: The fixed arm (100) is tubular, the telescopic arm (200) is columnar, and the telescopic arm (200) is inserted into the lumen of the fixed arm (100).

3. The telescopic rear axle with variable wheelbase according to claim 2, characterized in that: There are three fixed arms (100), and the three fixed arms (100) are arranged in a triangle. The three fixed arms (100) are fixedly connected by a connecting block. Correspondingly, there are three telescopic arms (200), and the ends of the three telescopic arms (200) are fixedly connected to the upper support fixing seat (210).

4. The telescopic rear axle with variable wheelbase according to claim 2 or 3, characterized in that: The surface of the telescopic arm (200) is provided with a groove whose length direction is the same as the axial direction of the telescopic arm (200).

5. The telescopic rear axle with variable wheelbase according to claim 2, characterized in that: The telescopic drive module (400) is arranged on the lower fixed arm (100).

6. The telescopic rear axle with variable wheelbase according to claim 5, characterized in that: The telescopic drive module (400) is an oil cylinder. The cylinder body of the oil cylinder is connected to the fixed arm (100), and the free end of the telescopic shaft of the oil cylinder is hinged to the end of the telescopic arm (200).

7. The telescopic rear axle with variable wheelbase according to claim 2, characterized in that: The wheel body (300) includes a leg (310), a lower support fixing seat (320) and a wheel (340). The upper part of the leg (310) is connected to the upper support fixing seat (210), the lower part of the leg (310) is connected to the lower support fixing seat (320), and the lower end of the lower support fixing seat (320) is connected to the wheel (340).

8. The telescopic rear axle with variable wheelbase according to claim 7, characterized in that: A wheel drive module is installed at the lower end of the lower support fixing seat (320), and the wheel drive module drives the wheel (340) to rotate.

9. The telescopic rear axle with variable wheelbase according to claim 8, characterized in that: The wheel drive module is a hydraulic motor (330).

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