Boom tail sliding block adjusting mechanism and crane

Abstract

The invention relates to the field of cranes and engineering machinery, in particular to a boom tail sliding block adjusting mechanism and a crane, and the adjusting structure comprises a sliding block body, an outer section cylinder body, an outer section cylinder body and an inner section cylinder body, the base is connected with the sliding block body in a fastening mode, a screw rod is arranged on the base, and the screw rod is used for being in threaded fit with a threaded hole in an arm tail; a first limiting hole is formed in the base; the threaded hole and the second limiting holes are formed in the arm tail; the threaded hole is used for being in threaded fit with the screw rod; the base is fixedly connected to the sliding block body of the arm tail sliding block, then the gap between the sliding block body and the outer section cylinder can be adjusted by rotating the screw on the base in the threaded hole in the arm tail, and limiting can be completed by fixedly connecting the base and the arm tail through the limiting piece after the gap is adjusted. Therefore, the purpose of conveniently adjusting the gap between the arm tail sliding block and the outer section cylinder body on the premise that the arm does not need to be pulled is achieved.

Description

Technical Field

[0001] The invention relates to the field of cranes and engineering machinery, and in particular to a boom tail sliding block adjusting mechanism and a crane. Background Art

[0002] Existing wheeled cranes often experience lateral bending of the boom when the boom is long and small and lifting heavy loads. The lateral bending is usually adjusted by adjusting the sliders above and on the sides of the boom head to reduce the gap between the sliders and the inner section cylinder.

[0003] However, sometimes, due to improper assembly of the tail slider or long-term wear, the gap between the tail slider of the inner arm and the outer arm cylinder is too large, and the side bending phenomenon is more obvious. At this time, adjusting the arm head slider often does not work, and if you want to adjust the tail slider, you can only pull out the inner arm and add adjustment gaskets to improve the gap between the tail slider and the outer cylinder, which is a huge workload and time-consuming and labor-intensive. Summary of the invention

[0004] The present invention proposes a crane boom tail slider adjustment mechanism, which can adjust the gap between the slider body and the outer section cylinder by fastening a base to the slider body of the boom tail slider and then rotating the screw on the base in the threaded hole on the boom tail, and after the gap adjustment is completed, the base and the boom tail are fixedly connected by a limiting member to complete the limiting, so that the gap can maintain a corresponding distance, thereby achieving the purpose of conveniently adjusting the gap between the boom tail slider and the outer section cylinder without pulling the boom.

[0005] The present invention adopts the following technical solution to solve the problem: In a first aspect, the present invention provides a boom tail slider adjustment mechanism, which is used to be arranged between the outer section cylinder and the boom tail of the inner section boom, and the adjustment structure includes: A slider body is arranged close to one side of the outer cylinder and a gap is left between the outer cylinder; A base is arranged near the end of the arm and is tightly connected to the slider body, a screw is provided on the base, and a first limiting hole is opened on the base; A threaded hole and a plurality of second limiting holes are both provided on the arm tail; the threaded hole is used to cooperate with the screw thread; When the screw is rotated in the threaded hole, the base and the slider body move along the axial direction of the screw to change the distance of the gap; When the screw is rotated until the first limiting hole is aligned with one of the plurality of second limiting holes, the limiting member is inserted into the aligned first limiting hole and the second limiting hole, the rotation of the screw is limited, and the gap is maintained at a corresponding distance.

[0006] Optionally, a plurality of mounting holes are provided on the base, and the plurality of mounting holes are used to install screws to fasten the base and the slider body.

[0007] Optionally, the first limiting hole is arranged on the inner side of the mounting hole.

[0008] Optionally, a transmission part is further provided on the base, and the transmission part is used to connect to an external driving member to drive the screw on the base to rotate.

[0009] Optionally, the transmission part includes a square hole, which is opened on the base and located on a side away from the screw rod.

[0010] Optionally, the plurality of second limiting holes are distributed in a circular array relative to the axis of the threaded hole; when the screw rotates in the threaded hole, the first limiting hole is aligned with the plurality of second limiting holes in turn.

[0011] Optionally, an annular baffle is further provided on the arm tail, and the annular baffle is located outside the plurality of second limiting holes.

[0012] Optionally, the first limiting hole includes a first screw hole, the second limiting hole includes a second screw hole, and the limiting member includes a limiting bolt.

[0013] Optionally, a reserved hole is provided on the outer section cylinder, and the inner section arm can be moved to a preset position so that the slider body is located at the reserved hole.

[0014] In a second aspect, the present invention provides a wheeled crane, which includes the above-mentioned boom tail slider adjustment mechanism.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The crane arm tail slider adjustment mechanism proposed in the present invention does not need to pull out the arm when adjusting the gap between the arm tail slider and the outer section cylinder, and does not need to install an additional support on the arm body. The present invention uses an adjustment structure composed of a slider and a base, and the gap can be adjusted by rotating the base, and then the gap adjustment can be completed by limiting, and the adjustment method is simple and convenient.

[0016] 2. The first limiting hole and the second limiting hole are aligned and inserted into the limiting member in the present invention to limit the position, which can cooperate with the rotation of the base and the screw. During the rotation of the screw, the first limiting hole can be aligned with each second limiting hole in turn. By selecting and aligning different second limiting holes, the gap can be determined at different distances. When multiple second limiting holes are distributed in a circular array, the minimum unit of gap adjustment is 1 / n of the screw pitch, so that the gap can be fine-tuned to make the slider body and the outer section cylinder fit better. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram showing the use of the boom tail slider adjustment structure; Figure 2 for Figure 1 A cross-sectional schematic diagram of the regulating structure; Figure 3 for Figure 1 Schematic diagram of the structure of the middle base; Figure 4 for Figure 3 A schematic cross-sectional view of the middle base; Figure 5 for Figure 1 Schematic diagram of the structure of the middle arm tail; Figure 6 for Figure 1 Structural schematic diagram of the middle and outer section cylinders and reserved holes; Figure 7 for Figure 6 A partial schematic diagram of .

[0018] Numbers in the figure: 1, adjustment structure; 11, slider body; 12, screw; 13, base; 131, square hole; 132, screw; mounting hole 133; 134, first limiting hole; 2, outer section cylinder; 3, limiting bolt; 4, arm tail; 41, annular baffle; 42, second limiting hole; 43, threaded hole; 5, spring washer. DETAILED DESCRIPTION

[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0020] In the prior art known to the inventors of the present application, the gap distance adjustment between the end slider of the boom and the outer cylinder of the crane arm can first be adjusted by changing the number of gaskets. This method is also a widely used adjustment method, but this method requires repeated disassembly and assembly of the slider to adjust the number of gaskets during the assembly process, and when the gap between the end slider and the outer cylinder needs to be adjusted later, the arm can only be pulled out, and if the gasket is not adjusted properly, the side bending problem may not be eliminated, and the arm needs to be repeatedly pulled out for multiple adjustments. In addition, the thickness of the gasket itself is usually 1-2mm, and the precision of the gap adjustment is limited. In addition, compared with the boom head, the space at the end of the boom is relatively limited. For the boom head, the prior art uses a solution similar to welding a support on the outer boom to adjust the gap. This method is difficult to apply to the end of the boom of the crane arm.

[0021] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention. Example 1

[0022] from Figure 1 and Figure 2This embodiment provides a boom tail slider adjustment mechanism, wherein the adjustment structure 1 is used to be arranged between the outer section cylinder 2 and the boom tail 4 of the inner section boom, and the adjustment structure 1 includes a slider body 11 close to one side of the outer section cylinder 2, and the slider body 11 is in contact with the outer section cylinder 2 with a gap.

[0023] Furthermore, combined with Figure 2 The adjusting structure 1 in this embodiment further includes a base 13 close to the arm tail 4, and the base 13 is fastened to the slider body 11; the base 13 may be round or square.

[0024] In a specific embodiment, in combination Figure 3 and Figure 4 The base 13 is provided with a plurality of mounting holes 133, into which screws 12 can be screwed, and the base 13 and the slider body 11 are fastened together by the screws 12. In another embodiment, the base 13 and the slider body 11 can also be connected by a connection method with the same function in the prior art, such as a snap connection, a plug connection, etc.

[0025] The base 13 is also provided with a screw rod 132. In addition, the base 13 is provided with a first limiting hole 134. The first limiting hole 134 is located inside the mounting hole 133. On the one hand, the position of the base 13 inside the mounting hole 133 is relatively stable. On the other hand, the first limiting hole 134 is closer to the axis of the base 13. After the limiting member is inserted into the first limiting hole 134, the limiting member is subjected to relatively less force when the base 13 rotates, and the stability and durability are better.

[0026] In this embodiment, the base 13 is further provided with a transmission part, and the transmission part is used to connect an external driving member to drive the screw 132 on the base 13 to rotate. In a specific embodiment, the transmission part includes a square hole 131, and the square hole 131 is opened on the base 13 and is located on a side away from the screw 132 and penetrates the slider body 11. The operator can use a wrench to drive the base 13 and the screw 132 to rotate through the square hole 131. Of course, in other specific embodiments, driving methods other than human power can also be realized, which is not specifically limited in this embodiment.

[0027] Combination Figure 2 and Figure 5Furthermore, a threaded hole 43 and a plurality of second limiting holes 42 are provided on the arm tail 4 of the inner arm, and the threaded hole 43 on the base 13 is threadedly matched with the screw rod 132. In addition, in this embodiment, an annular baffle 41 is also provided on the arm tail 4, and the annular baffle 41 is located outside the plurality of second limiting holes 42. After the screw rod 132 is screwed into the threaded hole 43, the annular baffle 41 can limit the base 13 and the slider body 11 to prevent movement.

[0028] When the screw rod 132 rotates in the threaded hole 43 , the thread fit is characterized by the superposition of linear motion and rotational motion.

[0029] As for the linear motion, the base 13 and the slider body 11 move along the axial direction of the screw 132, and the axial direction of the screw 132 intersects with the relative plane of the slider body 11 and the outer cylinder 2, so that when the base 13 and the slider body 11 move along the axial direction of the screw 132, the distance between the slider body 11 and the outer cylinder 2 changes.

[0030] As for the rotational motion, when the screw 132 rotates in the threaded hole 43, the base 13 rotates around the axis of the screw 132, and the position of the first limiting hole 134 also changes with the rotation, while the arm tail 4 of the inner arm is fixed, and the first limiting hole 134 can be aligned with each second limiting hole 42 in sequence with the rotation. At the same time, the base 13 and the slider body 11 move axially along the screw 132 to change the distance of the gap.

[0031] In a specific embodiment, the plurality of second limiting holes 42 are distributed in a circular array relative to the axis of the threaded hole 43, and during one rotation of the screw rod 132, the first limiting hole 134 is aligned with the plurality of second limiting holes 42 distributed in the circular array in turn. After the first limiting hole 134 is aligned with one of the plurality of second limiting holes 42 and penetrates into the limiting member, the screw rod 132 is limited and stops rotating, and the gap between the slider body 11 and the outer section cylinder 2 is maintained at a corresponding distance. When the first limiting hole 134 is aligned with different second limiting holes 42, the distances maintained by the gap are different, that is, the gap between the slider body 11 and the outer section cylinder 2 can be adjusted by rotating the screw rod 132, and then the gap between the slider body 11 and the outer section cylinder 2 can be maintained at a corresponding distance after adjustment by aligning the first limiting hole 134 with different second limiting holes 42 to complete the adjustment.

[0032] Assuming that the plurality of second limiting holes 42 are distributed in a circular array, and the number of the second limiting holes 42 is n, then the minimum unit of gap distance adjustment is 1 / n of the pitch of the screw 132, thereby achieving fine adjustment of the gap of the slider body 11 of the arm tail 4, so that the slider body 11 can fit more closely with the outer section cylinder 2. In addition, the distribution density between the plurality of second limiting holes 42 can also be determined according to actual needs, and does not need to be strictly distributed in a circular array. Figure 5 In this embodiment, there are four second limiting holes 42 , which are distributed in a circular array relative to the axis of the threaded hole 43 .

[0033] The adjustment method in this embodiment is simple, and the arm does not need to be pulled out during adjustment, so as to facilitate multiple adjustments. In addition, no additional support is required on the arm body, and the embodiment can be adapted to the tail of the crane arm with a relatively narrow operating space.

[0034] In another specific embodiment, one or more first limiting holes 134 can be provided, and different first limiting holes 134 can be aligned with each second limiting hole 42 in sequence, so as to make more diverse adjustments. In a specific embodiment, the first limiting hole 134 includes a first screw hole, the second limiting hole 42 includes a second screw hole, and the limiting member includes a limiting bolt 3. A notch for screwing in the limiting bolt 3 is reserved at the position of the slider body 11 corresponding to the first limiting hole 134. The operator screws the limiting bolt 3 into the aligned first screw hole and the second screw hole with the spring washer 5 to fix the base 13, and the screw rod 132 stops rotating.

[0035] Combination Figure 6 and Figure 7 In a specific embodiment, for ease of operation, a reserved hole 21 is provided on the outer section cylinder 2, and the inner section arm can be moved to a preset position so that the slider body 11 is located at the reserved hole 21. At this time, the square hole 131, the first limiting hole 134 and the second limiting hole 42 are all exposed outside the reserved hole 21 to perform the above-mentioned adjustment operation.

[0036] In summary, the operation process of this embodiment is as follows: first, the inner arm is manipulated to extend the inner arm to a preset position, so that the slider body 11 of the slider of the arm tail 4 is opposite to the reserved hole 21 on the outer cylinder 2, and the slider body 11 is exposed to the outside through the reserved hole 21. Taking the square hole 131 as an example of the transmission part, a wrench is inserted into the square hole 131 to rotate the base 13 and the screw 132. During the rotation, the gap distance between the slider body 11 and the outer cylinder 2 changes, so that the slider of the arm tail 4 can be adjusted without pulling the arm. As the screw rod 132 rotates, when the gap distance between the slider body 11 and the outer section cylinder 2 reaches the preset target distance, taking the first limiting hole 134 including the first screw hole, the second limiting hole 42 including the second screw hole, and the limiting member including the limiting bolt 3 as an example, the limiting bolt 3 is screwed into the aligned first screw hole and the second screw hole, the base 13 and the arm tail 4 are connected and fixed, the rotation of the screw rod 132 is limited, the gap distance between the slider body 11 and the outer section cylinder 2 is determined, and the adjustment of the slider of the arm tail 4 is completed. Example 2

[0037] Based on the same inventive concept as in Example 1, this embodiment provides a crane, which includes a boom tail slider adjustment mechanism as described in Example 1.

[0038] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A crane boom tail slider adjustment mechanism, characterized in that: The adjusting structure (1) is used to be arranged between the outer section cylinder (2) and the arm tail (4) of the inner section arm, and comprises: A slider body (11) is arranged close to one side of the outer cylindrical body (2) and has a gap with the outer cylindrical body (2); A base (13) is arranged close to one side of the arm tail (4) and is fastened to the slider body (11); a screw rod (132) is provided on the base (13); and a first limiting hole (134) is opened on the base (13); A threaded hole (43) and a plurality of second limiting holes (42) are both formed on the arm tail (4), and the threaded hole (43) is used to be threadably matched with the screw rod (132); When the screw rod (132) rotates in the threaded hole (43), the base (13) and the slider body (11) move along the axial direction of the screw rod (132) so that the distance of the gap changes; When the screw rod (132) is rotated until the first limiting hole (134) is aligned with one of the plurality of second limiting holes (42), the limiting member is inserted into the aligned first limiting hole (134) and the second limiting hole (42), the rotation of the screw rod (132) is limited, and the gap is maintained at a corresponding distance.

2. The boom tail slider adjustment mechanism according to claim 1, characterized in that: The base (13) is provided with a plurality of mounting holes (133), and the plurality of mounting holes (133) are used to mount screws (12) to fasten the base (13) and the slider body (11) together.

3. The boom tail slider adjustment mechanism according to claim 2, characterized in that: The first limiting hole (134) is arranged inside the mounting hole (133).

4. The boom tail slider adjustment mechanism according to claim 1, characterized in that: The base (13) is also provided with a transmission part, which is used to connect to an external driving component to drive the screw rod (132) on the base (13) to rotate.

5. The boom tail slider adjustment mechanism according to claim 4, characterized in that: The transmission part comprises a square hole (131), wherein the square hole (131) is opened on the base (13) and is located on a side away from the screw rod (132).

6. The boom tail slider adjustment mechanism according to claim 1, characterized in that: The plurality of second limiting holes (42) are distributed in a circular array relative to the axis of the threaded hole (43); when the screw rod (132) rotates in the threaded hole (43), the first limiting hole (134) is aligned with the plurality of second limiting holes (42) in turn.

7. The boom tail slider adjustment mechanism according to claim 6, characterized in that: An annular baffle (41) is also provided on the arm tail (4), and the annular baffle (41) is located outside the plurality of second limiting holes (42).

8. The boom tail slider adjustment mechanism according to claim 1, characterized in that: The first limiting hole (134) comprises a first screw hole, the second limiting hole (42) comprises a second screw hole, and the limiting member comprises a limiting bolt (3).

9. The boom tail slider adjustment mechanism according to claim 1, characterized in that: A reserved hole (21) is provided on the outer section cylinder (2), and the inner section arm can be moved to a preset position so that the slider body (11) is located at the reserved hole (21).

10. A crane, characterized in that: It comprises a boom tail slider adjustment mechanism as described in any one of claims 1-9.

Images