Rotary limiting device for small agricultural excavator

Abstract

The utility model relates to a rotation limiting device for a small agricultural excavator. The technical problems that an existing limiting device needs to be detached when removed, and time and labor are wasted are solved. The device is arranged between an excavator frame and an excavator base and comprises a rotary seat ring arranged at the upper end of the excavator base, a rotary mounting structure capable of enabling the excavator frame and the rotary seat ring to rotate by 360 degrees in the circumferential direction is arranged between the rotary seat ring and the excavator frame, and two limiting blocks are detachably arranged on the outer side of the rotary seat ring in the circumferential direction. The lower end of the excavator frame is provided with a movable plug pin structure which is located between the two limiting blocks and enables the excavator frame to rotate in the circumferential direction within the range of 270 degrees relative to the rotary seat ring. The device has the advantages that the device is used for meeting the standard requirement that the rotation angle of the small agricultural excavator is smaller than 270 degrees, the rotation angle range can be conveniently adjusted through the plug pin piece and the limiting block, the device can be detached according to use requirements, and therefore the universality of the small agricultural excavator is improved, and the use range of the small agricultural excavator is widened.

Description

Technical Field

[0001] The utility model belongs to the technical field of agricultural machinery and engineering machinery equipment, and in particular relates to a slewing limiting device for a small agricultural excavator. Background Art

[0002] Small agricultural excavators are easy to operate, have a wide range of applications, and have strong road passability, making them a vital production tool in agricultural machinery. At present, small agricultural excavators are used in farmland, mountainous areas, and small spaces, including digging ditches, planting fruit trees, and working in vegetable greenhouses. However, the slewing limit devices of traditional agricultural excavators mostly use fixed or welded limit devices. Once installed, the slewing angle range is completely limited and cannot be adjusted in time according to the working conditions. If the limit needs to be released, it must be disassembled and reinstalled, which is time-consuming and laborious. Summary of the invention

[0003] The purpose of the utility model is to provide a rotation limiting device for a small agricultural excavator in view of the above problems.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a slewing limit device for a small agricultural excavator, which is arranged between the excavator frame and the excavator base, including a slewing seat ring arranged at the upper end of the excavator base, a rotating mounting structure capable of rotating the excavator frame and the slewing seat ring 360 degrees in the circumference is arranged between the slewing seat ring and the excavator frame, two limit blocks can be detachably arranged on the circumferential outer side of the slewing seat ring, and a movable latch structure located between the two limit blocks and capable of rotating the excavator frame in the circumferential direction within a range of 270 degrees relative to the slewing seat ring is arranged at the lower end of the excavator frame. The excavator frame can rotate 360 ​​degrees in the circumference relative to the excavator base through the slewing mounting structure, and under the control of the movable latch structure and in cooperation with the limit blocks, the excavator frame can rotate within 270 degrees in the circumference relative to the excavator base, thereby greatly improving the scope of use.

[0005] In the above-mentioned slewing limit device for a small agricultural excavator, the slewing mounting structure includes a slewing bearing fixedly arranged at the upper end of the slewing seat ring, and the lower end of the excavator frame is fixedly connected with a frame support rotatably arranged on the inner side of the slewing bearing in the circumferential direction, and the slewing bearing and the frame support are both annular and coaxially rotatable. The slewing bearing is connected to the excavator base, and the frame support is connected to the excavator frame, so that the excavator frame can rotate freely relative to the excavator base.

[0006] In the above-mentioned slewing limit device for a small agricultural excavator, the slewing seat ring is cylindrical and has a flange mounting portion formed on the upper end, and the flange mounting portion is coaxially connected to the slewing support through a plurality of first mounting bolts, and the excavator frame is connected to the frame support through a plurality of second mounting bolts. The first mounting screws and the second mounting screws are used to ensure that the slewing mounting structure, the excavator frame and the excavator base are firmly connected.

[0007] In the above-mentioned slewing limit device for a small agricultural excavator, the two limit blocks have the same shape and size, and the two sides of the limit block have symmetrically arranged limit holes. The limit holes are arranged symmetrically, so that both sides of the limit block can be limited, and it is also convenient for disassembly and assembly.

[0008] In the above-mentioned slewing limit device for a small agricultural excavator, one end of the limit block has an arc portion matching the outer side of the slewing seat ring, and the other end of the limit block extends radially outward along the slewing seat ring. The arc portion is conducive to the installation of the limit block in place and reduces the possibility of deviation.

[0009] In the above-mentioned slewing limit device for a small agricultural excavator, the end of the limit block close to the slewing seat ring is provided with a limit block mounting cylinder that vertically penetrates the limit block, and the limit block mounting cylinder is provided with a limit block mounting bolt that is fixedly connected to the flange mounting part and the slewing support in sequence.

[0010] In the above-mentioned slewing limit device for a small agricultural excavator, the movable latch structure includes a latch cylinder arranged at the lower end of the excavator frame and located on the circumferential outer side of the slewing seat ring, the inner side of the latch cylinder is provided with a latch hole, a latch member is vertically and movably arranged in the latch hole, and the latch member is connected to an axially movable component that can make the lower end of the latch member exposed from the latch hole or retract into the latch hole.

[0011] In the above-mentioned slewing limit device for a small agricultural excavator, the latch cylinder is vertically fixedly arranged at the lower end of the excavator frame and located between two limit blocks, and the height of the latch cylinder is higher than the height of the limit blocks.

[0012] In the above-mentioned slewing limit device for a small agricultural excavator, a limit column is provided at the lower end of the latch member, and when the limit column is exposed from the latch hole, it can abut against the limit hole of the limit block, the diameter of the limit column is smaller than the diameter of the latch member, and the length of the latch member is greater than the length of the latch cylinder. When the limit column contacts the limit hole, the excavator frame locking function is realized, thereby controlling the rotation range of the excavator frame.

[0013] In the above-mentioned slewing limit device for a small agricultural excavator, the axial movable assembly includes an operating handle arranged at the upper end of the excavator frame, the upper end of the latch member has a latch adjustment portion extending to the upper end of the excavator frame, the latch adjustment portion is provided with a latch connection hole, the operating handle is bent, one end of the operating handle is arranged in the latch connection hole and the other end is provided with a ball head. The operating handle is convenient for controlling the movement of the latch member, so that it can be freely adjusted according to the use requirements, thereby improving the overall practicality.

[0014] Compared with the existing technology, the advantages of the utility model are:

[0015] 1. The device is used to meet the standard requirement that the rotation angle of small agricultural excavators is less than 270 degrees. The rotation angle range can be easily adjusted through the latch and the limit block, and can be disassembled according to the use requirements, thereby improving the versatility and use range of small agricultural excavators.

[0016] 2. The device adopts a movable latch structure, which is convenient and quick to install. When the latch is in contact with the limit block, the excavator frame and the excavator base can only work within a range of less than 270 degrees. When the latch is separated from the limit block, the excavator frame and the excavator base can achieve a full 360-degree rotation, which greatly improves the use range of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model.

[0018] Figure 2 It is a structural schematic diagram of the utility model from another viewing angle.

[0019] Figure 3 It is a structural schematic diagram of an excavator base in the utility model.

[0020] Figure 4 It is a structural schematic diagram of the rotating installation structure in the utility model.

[0021] Figure 5 It is a structural schematic diagram of the limit block in the utility model.

[0022] Figure 6 It is a structural schematic diagram of the latch member and the operating handle in the utility model.

[0023] Figure 7 It is a schematic diagram of the structure of the utility model rotating within a circumferential range of 270 degrees.

[0024] Figure 8 It is a schematic diagram of the structure of the utility model rotating within a 360-degree circumferential range.

[0025] In the figure: excavator frame 1, excavator base 11, slewing seat ring 2, flange mounting part 21, first mounting bolt 22, second mounting bolt 23, rotating mounting structure 3, slewing support 31, frame support 32, limit block 4, limit hole 41, arc portion 42, limit block mounting cylinder 43, limit block mounting bolt 44, movable latch structure 5, latch cylinder 51, latch hole 52, latch member 53, limit column 54, axial movable component 6, operating handle 61, latch adjustment part 62, latch connecting hole 63, ball head 64. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0027] like Figure 1-8 As shown, a slewing limit device for a small agricultural excavator is arranged between an excavator frame 1 and an excavator base 11, including a slewing seat ring 2 arranged at the upper end of the excavator base 11, a slewing mounting structure 3 is arranged between the slewing seat ring 2 and the excavator frame 1, which can make the excavator frame 1 and the slewing seat ring 2 rotate 360 ​​degrees in the circumferential direction, two limit blocks 4 are detachably arranged on the circumferential outer side of the slewing seat ring 2, and a movable latch structure 5 is arranged at the lower end of the excavator frame 1 between the two limit blocks 4 and can make the excavator frame 1 rotate circumferentially within a circumferential range of 270 degrees relative to the slewing seat ring 2. The excavator frame 1 can rotate 360 ​​degrees in the circumferential direction relative to the excavator base 11 through the slewing mounting structure 3, and under the control of the movable latch structure 5 and in cooperation with the limit blocks 4, the excavator frame 1 can rotate within 270 degrees in the circumferential direction relative to the excavator base 11, which greatly improves the scope of use.

[0028] like Figure 4 As shown, the rotating mounting structure 3 includes a slewing bearing 31 fixedly arranged at the upper end of the slewing seat ring 2, and a frame support 32 rotatably arranged on the inner side of the slewing bearing 31 is fixedly connected to the lower end of the excavator frame 1, and the slewing bearing 31 and the frame support 32 are both annular and coaxially rotatable. The slewing bearing 31 is connected to the excavator base 11, and the frame support 32 is connected to the excavator frame 1, so that the excavator frame 1 can rotate freely relative to the excavator base 11.

[0029] Combination Figure 2 and Figure 3 As shown, the slewing seat ring 2 is cylindrical and has a flange mounting portion 21 formed on the upper end, and the flange mounting portion 21 is coaxially connected to the slewing support 31 through a plurality of first mounting bolts 22, and the excavator frame 1 is connected to the frame support 32 through a plurality of second mounting bolts 23. The first mounting screws 22 and the second mounting screws 23 ensure that the connection between the rotating mounting structure 3, the excavator frame 1 and the excavator base 11 is firm.

[0030] Combination Figure 3and Figure 5 As shown, the two limit blocks 4 have the same shape and size, and the two sides of the limit block 4 have symmetrically arranged limit holes 41. The limit holes 41 are arranged symmetrically, so that both sides of the limit block 4 can be limited, and it is also convenient for disassembly and assembly.

[0031] One end of the limit block 4 has an arc portion 42 matching the outer side of the rotary race 2, and the other end of the limit block 4 is arranged to extend radially outward along the rotary race 2. The arc portion 42 is conducive to the installation of the limit block 4 in place and reduces the possibility of deviation.

[0032] Specifically, a limit block mounting cylinder 43 vertically passing through the limit block 4 is provided at one end of the limit block 4 close to the slewing seat ring 2, and a limit block mounting bolt 44 fixedly connected to the flange mounting portion 21 and the slewing support 31 in sequence is provided in the limit block mounting cylinder 43.

[0033] Combination Figure 2 and Figure 6 As shown, the movable latch structure 5 includes a latch cylinder 51 which is arranged at the lower end of the excavator frame 1 and located on the circumferential outer side of the slewing seat ring 2. The inner side of the latch cylinder 51 has a latch hole 52. A latch member 53 is vertically movable in the latch hole 52, and the latch member 53 is connected to an axially movable component 6 which can make the lower end of the latch member 53 exposed from the latch hole 52 or retracted into the latch hole 52.

[0034] The latch cylinder 51 is vertically fixedly disposed at the lower end of the excavator frame 1 and is located between the two limit blocks 4 , and the height of the latch cylinder 51 is higher than the height of the limit blocks 4 .

[0035] Specifically, a limiting column 54 is provided at the lower end of the latch member 53, and when the limiting column 54 is exposed from the latch hole 52, it can abut against the limiting hole 41 of the limiting block 4, the diameter of the limiting column 54 is smaller than the diameter of the latch member 53, and the length of the latch member 53 is greater than the length of the latch cylinder 51. When the limiting column 54 contacts the limiting hole 41, the locking function of the excavator frame 1 is realized, thereby controlling the rotation range of the excavator frame 1.

[0036] Furthermore, the axial movable assembly 6 includes an operating handle 61 disposed at the upper end of the excavator frame 1, the upper end of the latch member 53 has a latch adjustment portion 62 extending to the upper end of the excavator frame 1, the latch adjustment portion 62 is provided with a latch connection hole 63, the operating handle 61 is bent, one end of the operating handle 61 is disposed in the latch connection hole 63 and the other end is provided with a ball head 64. The operating handle 1 is convenient for controlling the movement of the latch member 53, so that it can be freely adjusted according to the use requirements, thereby improving the overall practicality.

[0037] The principle of this embodiment is:

[0038] Combination Figure 7 and Figure 8 As shown, when the latch member 53 extends out of the outside of the latch cylinder 51 under the control of the operating handle 61, when the excavator frame 1 rotates, the limit column 54 moves into the limit hole 41, and the rotation angle of the excavator frame 1 is limited, thereby meeting the standard requirement of the rotation angle within 270 degrees; when the operating handle 61 moves upward, the limit column 54 moves into the latch hole 52, and the excavator frame 1 cancels the rotation angle limitation, thereby meeting the working requirement of the rotation angle within 360 degrees.

[0039] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0040] Although this article uses more terms such as excavator frame 1, excavator base 11, slewing seat ring 2, flange mounting part 21, first mounting bolt 22, second mounting bolt 23, rotating mounting structure 3, slewing support 31, frame support 32, limit block 4, limit hole 41, arc portion 42, limit block mounting cylinder 43, limit block mounting bolt 44, movable latch structure 5, latch cylinder 51, latch hole 52, latch member 53, limit column 54, axial movable assembly 6, operating handle 61, latch adjustment part 62, latch connection hole 63, ball head 64, etc., it does not exclude the possibility of using other terms. The use of these terms is only for more convenient description and explanation of the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A slewing limit device for a small agricultural excavator, arranged between an excavator frame (1) and an excavator base (11), comprising a slewing seat ring (2) arranged at the upper end of the excavator base (11), a slewing mounting structure (3) capable of enabling the excavator frame (1) and the slewing seat ring (2) to rotate 360 ​​degrees in a circumferential direction is arranged between the slewing seat ring (2) and the excavator frame (1), characterized in that: Two limit blocks (4) are detachably provided on the circumferential outer side of the slewing seat ring (2), and a movable latch structure (5) is provided at the lower end of the excavator frame (1) and is located between the two limit blocks (4) and enables the excavator frame (1) to rotate circumferentially within a circumferential range of 270 degrees relative to the slewing seat ring (2).

2. A slewing limit device for a small agricultural excavator according to claim 1, characterized in that: The rotating mounting structure (3) comprises a slewing bearing (31) fixedly arranged at the upper end of the slewing seat ring (2); the lower end of the excavator frame (1) is fixedly connected with a frame support (32) rotatably arranged on the inner side of the slewing bearing (31) in the circumferential direction; and the slewing bearing (31) and the frame support (32) are both annular and coaxially rotatably arranged.

3. A slewing limit device for a small agricultural excavator according to claim 2, characterized in that: The slewing seat ring (2) is cylindrical and has a flange mounting portion (21) formed at the upper end. The flange mounting portion (21) is coaxially connected to the slewing support (31) via a plurality of first mounting bolts (22). The excavator frame (1) is connected to the frame support (32) via a plurality of second mounting bolts (23).

4. A slewing limit device for a small agricultural excavator according to claim 1, 2 or 3, characterized in that: The two limiting blocks (4) have the same shape and size, and both sides of the limiting blocks (4) are provided with symmetrically arranged limiting holes (41).

5. A slewing limit device for a small agricultural excavator according to claim 4, characterized in that: One end of the limit block (4) has an arc-shaped portion (42) matching the outer side of the rotary seat ring (2), and the other end of the limit block (4) is arranged to extend radially outward along the rotary seat ring (2).

6. The slewing limit device for a small agricultural excavator according to claim 3, characterized in that: The end of the limit block (4) close to the slewing ring (2) is provided with a limit block mounting cylinder (43) which vertically penetrates the limit block (4), and the limit block mounting cylinder (43) is provided with a limit block mounting bolt (44) which is fixedly connected to the flange mounting part (21) and the slewing support (31) in sequence.

7. A slewing limit device for a small agricultural excavator according to claim 4, characterized in that: The movable latch structure (5) comprises a latch cylinder (51) arranged at the lower end of the excavator frame (1) and located on the circumferential outer side of the slewing seat ring (2); the inner side of the latch cylinder (51) is provided with a latch hole (52); a latch member (53) is vertically movable in the latch hole (52); and the latch member (53) is connected to an axially movable component (6) capable of making the lower end of the latch member (53) exposed from the latch hole (52) or retracted into the latch hole (52).

8. The slewing limit device for a small agricultural excavator according to claim 7, characterized in that: The latch cylinder (51) is vertically fixedly arranged at the lower end of the excavator frame (1) and is located between two limit blocks (4); the height of the latch cylinder (51) is higher than the height of the limit blocks (4).

9. The slewing limit device for a small agricultural excavator according to claim 7, characterized in that: A limiting column (54) is provided at the lower end of the latch member (53) and when the limiting column (54) is exposed from the latch hole (52), it can abut against the limiting hole (41) of the limiting block (4); the diameter of the limiting column (54) is smaller than the diameter of the latch member (53), and the length of the latch member (53) is greater than the length of the latch cylinder (51).

10. The slewing limit device for a small agricultural excavator according to claim 7, characterized in that: The axial movable assembly (6) comprises an operating handle (61) arranged at the upper end of the excavator frame (1); the upper end of the latch member (53) comprises a latch adjustment portion (62) extending to the upper end of the excavator frame (1); the latch adjustment portion (62) is provided with a latch connection hole (63); the operating handle (61) is bent; one end of the operating handle (61) is arranged in the latch connection hole (63) and the other end is provided with a ball head (64).

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