Hydraulic depth limiting wheel

Abstract

The utility model discloses a hydraulic depth limiting wheel which comprises a fixed arm, the fixed arm is fixed on a vehicle body, a movable arm is hinged to the lower end of the fixed arm, one end, far away from the fixed arm, of the movable arm is connected with a depth limiting wheel through a supporting frame, the depth limiting wheel is rotatably connected on the supporting frame through a bearing, and a hydraulic oil cylinder is connected between the fixed arm and the movable arm. A hydraulic oil cylinder is fixed on the fixed arm, the tail end of a cylinder body of the hydraulic oil cylinder is hinged on the fixed arm, a connecting block is fixed at the outer end of a piston rod of the hydraulic oil cylinder, and the connecting block is hinged on the side wall of the movable arm. The movable arm is driven to rotate around the hinge point, so that the angle and the distance between the depth limiting wheel and the ground are changed, and the operation depth is adjusted and controlled.

Description

Technical Field

[0001] The utility model relates to a hydraulic depth limiting wheel and belongs to the technical field of depth limiting wheels. Background Art

[0002] Traditional depth-limiting wheel adjustment methods often rely on manual operation, which is cumbersome and has limited precision, making it difficult to adapt to the complex and changing farmland environment and operational requirements. Currently, there are hydraulic depth-limiting wheels on the market that use hydraulic cylinders to adjust the contact depth with the ground to ensure accuracy and stability during operations such as tillage, sowing, and excavation. However, in actual use, the piston rod of the hydraulic cylinder is often easily contaminated and damaged by the external environment, such as mud, sand, dust, and moisture. These pollutants not only affect the normal operation of the piston rod, but may also cause failure of the entire hydraulic system.

[0003] In order to solve the above problems, a hydraulic depth limiting wheel is proposed. Utility Model Content

[0004] The purpose of the utility model is to provide a hydraulic depth limiting wheel to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solution: a hydraulic depth limiting wheel, comprising:

[0006] A fixed arm, the fixed arm is fixed to the vehicle body;

[0007] A movable arm, the movable arm being hinged to the lower end of the fixed arm;

[0008] A depth limiting wheel, the axle of which is connected to the end of the movable arm away from the fixed arm through a support frame;

[0009] A hydraulic cylinder, the rear end of the cylinder body of the hydraulic cylinder is hinged on the fixed arm, the outer end of the piston rod of the hydraulic cylinder is fixed with a connecting block, and the connecting block is hinged on the side wall of the movable arm;

[0010] A protective cover for covering the piston rod of the hydraulic cylinder is fixed on the connecting block, and one end of the protective cover away from the connecting block is slidably sleeved on the cylinder body of the hydraulic cylinder.

[0011] Preferably, a first oil circuit and a second oil circuit are opened on the side wall of the hydraulic cylinder, the outer ends of the first oil circuit and the second oil circuit extend to the tail end of the hydraulic cylinder and are connected to an external hose, the inner end of the first oil circuit is connected to the rod cavity of the hydraulic cylinder, and the outer end of the second oil circuit is connected to the rodless cavity of the hydraulic cylinder.

[0012] Preferably, a connecting structure is provided at the lower end of the movable arm, and the connecting structure includes a connecting head fixed at the lower end of the movable arm, and the connecting head is locked and connected to the support frame through a locking screw.

[0013] Preferably, the connecting head is column-shaped, and the support frame is rotatably connected to the connecting head. A baffle is fixed to the end of the connecting head away from the movable arm. The baffle can prevent the support frame from sliding off the connecting head, thereby increasing the stability of the connection. A cross-shaped first socket is provided on the side wall of the connecting head. The first socket includes two straight holes passing through the connecting head. The size and shape of the first socket match the head of the locking screw to facilitate the insertion of the locking screw. A second socket is provided on the side wall of the support frame at a position corresponding to the first socket. The size and shape of the second socket match the rod of the locking screw. The locking screw passes through the first socket and the second socket to firmly connect the support frame.

[0014] Preferably, the surface of the depth limiting wheel is provided with anti-slip textures.

[0015] Preferably, the outer surfaces of the fixed arm and the movable arm are both provided with reinforcing ribs for increasing strength.

[0016] Preferably, the fixed arm is connected with a plurality of U-shaped clamps for locking and tightly clamping the frame crossbeam, and both ends of the plurality of clamps penetrate the side wall of the fixed arm and are locked on the fixed arm by nuts.

[0017] Preferably, the depth limiting wheel is rotatably connected to the support frame via a bearing.

[0018] Compared with existing technologies:

[0019] When the utility model is operated by the hydraulic cylinder, the hydraulic cylinder will push the movable arm and the depth limiting wheel to adjust the angle through the extension and contraction of the piston rod, that is, drive the movable arm to rotate around the hinge point, thereby changing the angle and distance between the depth limiting wheel and the ground, and then realizing the regulation of the working depth.

[0020] The utility model uses the protective cover as a protective component for the piston rod of the hydraulic cylinder, which can protect the piston rod of the hydraulic cylinder from pollution and damage from the external environment. The end of the protective cover away from the connecting block is slidably connected to the cylinder body, so that the protective cover can move with the extension and retraction of the piston rod of the hydraulic cylinder, ensuring that the protective cover always covers and protects the piston rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the utility model;

[0022] Figure 2 It is a structural schematic diagram of the fixed arm, movable arm and hydraulic cylinder of the utility model;

[0023] Figure 3 It is a cross-sectional exploded view of the hydraulic cylinder and the protective cover of the utility model;

[0024] Figure 4 It is a structural schematic diagram of the fixed arm, movable arm, support frame and depth-limiting wheel of the utility model;

[0025] Figure 5 It is an exploded view of the movable arm, support frame, connecting head and locking screw of the utility model.

[0026] In the figure: 1. fixed arm, 2. movable arm, 3. depth limiting wheel, 4. support frame, 5. hydraulic cylinder, 6. connecting block, 7. protective cover, 8. first oil circuit, 9. second oil circuit, 10. connecting head, 11. locking screw, 12. baffle, 13. first socket, 14. second socket, 15. clamp. DETAILED DESCRIPTION

[0027] The present invention is described below with specific embodiments, but is not intended to be a limitation of the present invention.

[0028] Embodiment 1

[0029] like Figure 1-Figure 5 As shown, in this embodiment, a hydraulic depth limiting wheel is provided, comprising a fixed arm 1, the fixed arm 1 is fixed on the vehicle body, a movable arm 2 is hinged at the lower end of the fixed arm 1, an end of the movable arm 2 away from the fixed arm 1 is connected to a depth limiting wheel 3 through a support frame 4, and the depth limiting wheel 3 is rotatably connected to the support frame 4 through a bearing; a hydraulic cylinder 5 is connected between the fixed arm 1 and the movable arm 2, the rear end of the cylinder body of the hydraulic cylinder 5 is hinged on the fixed arm 1, a connecting block 6 is fixed at the outer end of the piston rod of the hydraulic cylinder 5, and the connecting block 6 is hinged to the movable arm 2 On the side wall of the hydraulic cylinder 5, the hydraulic cylinder 5 is the power source for pushing the movable arm 2 and the depth limiting wheel 3 to move. When the hydraulic cylinder 5 is working, the hydraulic cylinder 5 will push the movable arm 2 and the depth limiting wheel 3 to adjust the angle through the extension and contraction of the piston rod, that is, drive the movable arm 2 to rotate around the hinge point, thereby changing the angle and distance between the depth limiting wheel 3 and the ground, and then realizing the regulation of the working depth, and when the piston rod of the hydraulic cylinder 5 is completely retracted into the cylinder body of the hydraulic cylinder 5, the depth limiting wheel 3 is maximized off the ground, and the depth limiting wheel 3 is retracted;

[0030] Among them, a protective cover 7 for covering the piston rod of the hydraulic cylinder 5 is fixed on the connecting block 6. The end of the protective cover 7 away from the connecting block 6 is slidably sleeved on the cylinder body of the hydraulic cylinder 5. The protective cover 7 serves as a protective component for the piston rod of the hydraulic cylinder 5, which can protect the piston rod of the hydraulic cylinder 5 from pollution and damage from the external environment. The end of the protective cover 7 away from the connecting block 6 is slidably connected to the cylinder body, so that the protective cover 7 can move with the extension and retraction of the piston rod of the hydraulic cylinder 5, ensuring that the protective cover 7 always covers and protects the piston rod.

[0031] like Figure 3As shown, in order to prevent the oil circuit of the hydraulic cylinder 5 from interfering with the sliding of the protective cover 7, a first oil circuit 8 and a second oil circuit 9 are opened on the side wall of the hydraulic cylinder 5. The outer ends of the first oil circuit 8 and the second oil circuit 9 extend to the tail end of the hydraulic cylinder 5 and are connected to an external hose. The inner end of the first oil circuit 8 is connected to the rod cavity of the hydraulic cylinder 5, and the outer end of the second oil circuit 9 is connected to the rodless cavity of the hydraulic cylinder 5.

[0032] The surface of the depth limiting wheel 3 is provided with anti-skid patterns.

[0033] The outer surfaces of the fixed arm 1 and the movable arm 2 are both provided with reinforcing ribs for increasing strength.

[0034] Embodiment 2

[0035] like Figure 1-Figure 5 As shown, on the basis of Example 1, in order to connect the depth limiting wheel 3 to the movable arm 2 through the support frame 4, a connecting structure is provided at the lower end of the movable arm 2. The connecting structure includes a connecting head 10 fixed at the lower end of the movable arm 2, and the connecting head 10 is locked and connected to the support frame 4 through a locking screw 11.

[0036] like Figure 1 , Figure 4 and Figure 5 As shown, in order to enable the depth limiting wheel 3 to be relatively rotated on the movable arm 2 through the support frame 4, the connecting head 10 is in a column shape, and the support frame 4 is rotatably connected to the connecting head 10. A baffle 12 is fixed to the end of the connecting head 10 away from the movable arm 2. The baffle 12 can prevent the support frame 4 from sliding off the connecting head 10, thereby increasing the stability of the connection. A cross-shaped first plug hole 13 is provided on the side wall of the connecting head 10. The first plug hole 13 includes two straight holes that pass through the connecting head 10. The size and shape of the first plug hole 13 match the head of the locking screw 11 to facilitate the insertion of the locking screw 11. A second plug hole 14 is provided on the side wall of the support frame 4 at a position corresponding to the first plug hole 13. The locking screw 11 passes through the first plug hole 13 and the second plug hole 14, so as to firmly connect the support frame 4.

[0037] After the locking screw 11 is removed from the first insertion hole 13 and the second insertion hole 14, the support frame 4 can be rotatably connected to the movable arm 2 around the axis of the connecting head 10;

[0038] When the depth-limiting wheel 3 rotates with the support frame 4 to Figure 1In the state shown, a straight hole of the first insertion hole 13 is aligned with the second insertion hole 14, and at this time, the threaded end of the locking screw 11 passes through the first insertion hole 13 and the second insertion hole 14 (the threaded end of the locking screw 11 is engaged with the matching locking nut), so that the support frame 4 and the movable arm 2 are connected as a whole. At this time, the hydraulic cylinder 5 pushes the movable arm 2 and the depth limiting wheel 3 to adjust the angle through the extension and contraction of the piston rod, thereby changing the angle and distance between the depth limiting wheel 3 and the ground, and then realizing the regulation of the working depth;

[0039] When the depth-limiting wheel 3 rotates with the support frame 4 to Figure 4 In the state shown, the other straight hole of the first insertion hole 13 is aligned with the second insertion hole 14, and the locking screw 11 passes through the first insertion hole 13 and the second insertion hole 14, so that the support frame 4 and the movable arm 2 are connected as a whole. At this time, when the piston rod of the hydraulic cylinder 5 is completely retracted into the cylinder body of the hydraulic cylinder 5, the depth limiting wheel 3 is maximized off the ground (when the side of the depth limiting wheel 3 is parallel to the ground), and the depth limiting wheel 3 is retracted;

[0040] Embodiment 3

[0041] like Figure 1 , Figure 2 As shown, on the basis of the first embodiment, in order to fix the fixed arm 1 on the frame, the fixed arm 1 is connected with a plurality of U-shaped clamps 15 for locking and tightly clamping the frame crossbeam, and the two ends of the plurality of clamps 15 pass through the side wall of the fixed arm 1 and are locked on the fixed arm 1 by nuts.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the present invention can still be modified or replaced by equivalents. Any modification or partial replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A hydraulic depth-limiting wheel, characterized in that: include: A fixed arm (1), wherein the fixed arm (1) is fixed on the vehicle body; A movable arm (2), wherein the movable arm (2) is hinged to the lower end of the fixed arm (1); A depth limiting wheel (3), wherein the wheel axle of the depth limiting wheel (3) is connected to an end of the movable arm (2) away from the fixed arm (1) through a support frame (4); A hydraulic cylinder (5), wherein the rear end of the cylinder body of the hydraulic cylinder (5) is hinged on the fixed arm (1), a connecting block (6) is fixed on the outer end of the piston rod of the hydraulic cylinder (5), and the connecting block (6) is hinged on the side wall of the movable arm (2); A protective cover (7) for covering the piston rod of the hydraulic cylinder (5) is fixed on the connecting block (6), and one end of the protective cover (7) away from the connecting block (6) is slidably sleeved on the cylinder body of the hydraulic cylinder (5).

2. A hydraulic depth-gauging wheel according to claim 1, characterized in that: A first oil circuit (8) and a second oil circuit (9) are provided on the side wall of the hydraulic cylinder (5); the outer ends of the first oil circuit (8) and the second oil circuit (9) extend to the rear end of the hydraulic cylinder (5) and are connected to an external hose; the inner end of the first oil circuit (8) is connected to the rod chamber of the hydraulic cylinder (5); and the outer end of the second oil circuit (9) is connected to the rodless chamber of the hydraulic cylinder (5).

3. The hydraulic depth-gauging wheel according to claim 1, characterized in that: The lower end of the movable arm (2) is provided with a connection structure, and the connection structure comprises a connection head (10) fixed to the lower end of the movable arm (2), and the connection head (10) is locked and connected to the support frame (4) via a locking screw (11).

4. The hydraulic depth-gauging wheel according to claim 3, characterized in that: The connecting head (10) is in the shape of a column, the supporting frame (4) is rotatably connected to the connecting head (10), a baffle (12) is fixed to one end of the connecting head (10) away from the movable arm (2), a cross-shaped first plug hole (13) is provided on the side wall of the connecting head (10), a second plug hole (14) is provided on the side wall of the supporting frame (4) at a position corresponding to the first plug hole (13), and the locking screw (11) passes through the first plug hole (13) and the second plug hole (14).

5. The hydraulic depth-gauging wheel according to claim 1, characterized in that: The surface of the depth limiting wheel (3) is provided with anti-skid patterns.

6. The hydraulic depth-gauging wheel according to claim 1, characterized in that: The outer surfaces of the fixed arm (1) and the movable arm (2) are both provided with reinforcing ribs for increasing strength.

7. The hydraulic depth-gauging wheel according to claim 1, characterized in that: The fixed arm (1) is connected to a plurality of U-shaped clamps (15) for locking and tightly clamping the frame crossbeam; both ends of the plurality of clamps (15) penetrate the side wall of the fixed arm (1) and are locked on the fixed arm (1) via nuts.

8. The hydraulic depth-gauging wheel according to claim 1, characterized in that: The depth limiting wheel (3) is rotatably connected to the support frame (4) via a bearing.

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