Rotation limiting device for crane

Abstract

The utility model relates to a rotation limiting device for a crane, which comprises a rotating seat and a rotating rod rotationally arranged on the rotating seat, and further comprises a sleeve, a rotating shaft, a rotating shaft and a rotating shaft, the spiral groove is formed in the sleeve; the sliding rod is arranged on the rotating rod in a sliding mode, and one end of the sliding rod is arranged in the spiral groove in a sliding mode; according to the rotation limiting device for the crane, when the rotating rod rotates, the spiral groove can precisely guide the sliding rod to slide along the sliding groove, the stopping block is arranged in the sliding groove in a sliding mode, and the stopping block is arranged on the rotating rod in a sliding mode. The mounting base on the rotating rod is connected with the stop block through the adjusting screw arranged in a threaded mode, an operator only needs to rotate the adjusting screw, the position of the stop block can be easily adjusted, then the moving range of the sliding rod is flexibly changed, and the rotation limiting angle is conveniently adjusted.

Description

Technical Field

[0001] This utility model belongs to the field of crane technology, specifically relating to a slewing limit device for cranes. Background Technology

[0002] Cranes are a common term for heavy industrial products such as ships, equipment, machinery, and molds. When cranes are in operation, in order to avoid collisions with other facilities or hoisted items, the working range of the crane needs to be limited. The crane's limit system can ensure the safety of personnel and property and avoid losses. The existing slewing limit of a utility crane is generally achieved by installing a cam bracket on a welded bolt fixed to the inner wall of the base column. When the crane is running, the limit valve roller installed at the lower end of the crane touches the cam and sends a stop signal to the hydraulic system to limit the crane's slewing working area.

[0003] However, this makes adjusting the slewing range very inconvenient. In actual operation scenarios, it is often necessary to adjust the slewing range of the crane according to different lifting tasks and site conditions. However, the existing structure makes this operation process cumbersome and difficult, making it difficult to quickly and accurately meet actual needs. On the other hand, when it is necessary to release the slewing limit, the adjustment work is also very inconvenient. Whether from the complexity of the operation process or the time and effort required, it seriously affects the working efficiency and flexibility of the crane. Utility Model Content

[0004] The purpose of this invention is to provide a conveniently adjustable slewing limit device for cranes in order to solve the above-mentioned problems.

[0005] This utility model achieves the above objectives through the following technical solutions:

[0006] A slewing limit device for a crane includes a rotating base and a rotating rod rotatably mounted on the rotating base, and further includes:

[0007] A sleeve, which is mounted on a rotating seat;

[0008] Spiral groove, the spiral groove being formed inside the sleeve;

[0009] A sliding rod is slidably mounted on a rotating rod, with one end of the sliding rod slidably mounted in a spiral groove;

[0010] A blocking block is slidably mounted on the rotating rod, thereby limiting the range of movement of the sliding rod on the rotating rod.

[0011] As a further optimization of this utility model, the sliding rod is provided with a slider, the rotating rod is provided with a groove, and the slider is slidably disposed in the groove.

[0012] As a further optimization of this utility model, the blocking block is slidably disposed in the slide groove, the rotating rod is provided with a mounting seat, the mounting seat is threaded with an adjusting screw, and the lower end of the adjusting screw is rotatably disposed on the blocking block.

[0013] As a further optimization of this utility model, the sleeve is fitted onto the rotating rod, and the sleeve is connected to the rotating seat by bolts.

[0014] As a further optimization of this utility model, the spiral groove is a spiral pattern with a height the same as the sliding groove.

[0015] As a further optimization of this utility model, a connecting groove is provided between the two ends of the spiral groove.

[0016] The beneficial effects of this utility model are as follows:

[0017] Unlike existing technologies, in actual use, when the rotating rod rotates, the spiral groove can accurately guide the sliding rod to slide along the groove, while the blocking block is slidably set in the groove. The mounting seat on the rotating rod is connected to the blocking block through the threaded adjusting screw. The operator only needs to rotate the adjusting screw to easily adjust the position of the blocking block, thereby flexibly changing the movement range of the sliding rod and realizing convenient adjustment of the rotation limit angle. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the sleeve connection structure of this utility model;

[0020] Figure 3 This is a utility model Figure 2 Schematic diagram of the split structure;

[0021] Figure 4 This is a utility model Figure 3 Enlarged structural diagram at point A in the middle;

[0022] Figure 5 This is a schematic diagram of the sleeve structure of this utility model;

[0023] Figure 6 This is a schematic diagram of the sliding rod connection structure of this utility model.

[0024] In the diagram: 1. Rotating seat; 2. Rotating rod; 3. Sleeve; 4. Blocking block; 41. Mounting seat; 42. Adjusting screw; 5. Spiral groove; 51. Connecting groove; 6. Sliding rod; 61. Sliding block; 62. Slide groove. Detailed Implementation

[0025] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0026] Example 1

[0027] like Figure 1 - Figure 6 As shown, a slewing limiting device for a crane includes a rotating base 1 and a rotating rod 2 rotatably mounted on the rotating base 1, and further includes:

[0028] Sleeve 3 is mounted on rotating seat 1 and sleeved on rotating rod 2. Sleeve 3 is connected to rotating seat 1 by bolts.

[0029] Spiral groove 5 is formed inside sleeve 3. Spiral groove 5 is a spiral pattern with a height the same as that of slide groove 62.

[0030] Sliding rod 6 is slidably mounted on rotating rod 2, and one end of sliding rod 6 is slidably mounted in spiral groove 5;

[0031] The blocking block 4 is slidably mounted on the rotating rod 2, thereby limiting the range of movement of the sliding rod 6 on the rotating rod 2.

[0032] A slider 61 is provided on the sliding rod 6, and a groove 62 is provided on the rotating rod 2. The slider 61 is slidably disposed in the groove 62. The sliding rod 6 plays a key role in connecting the rotating rod 2 and the spiral groove 5. It combines the rotational motion of the rotating rod 2 with the guiding function of the spiral groove 5, so that the rotational motion of the rotating rod 2 can proceed according to a preset trajectory and range.

[0033] The blocking block 4 is slidably set in the slide groove 62. The rotating rod 2 is provided with a mounting base 41. The mounting base 41 is threaded with an adjusting screw 42. The lower end of the adjusting screw 42 is rotatably set on the blocking block 4. The operator only needs to rotate the adjusting screw 42 to flexibly change the movement range of the sliding rod 6 according to the actual work requirements, thereby realizing convenient adjustment of the crane's rotation limit and adapting to different work scenarios and lifting tasks.

[0034] A connecting groove 51 is provided between the two ends of the spiral groove 5. When the blocking block 4 is at the highest point, the connecting groove 51 allows the sliding rod 6 to quickly return from the highest end of the groove 62 to the lowest end, realizing the cyclic transition of the sliding rod 6 in the spiral groove 5, thereby releasing the rotation limit on the rotating rod 2.

[0035] It should be noted that the working principle of the slewing limit device for this crane is as follows: The rotating rod 2 is rotatably mounted on the rotating seat 1, and the sleeve 3 is mounted on the rotating seat 1 and sleeved on the rotating rod 2, and the two are connected by bolts. One end of the sliding rod 6 is slidably mounted in the groove 62 of the rotating rod 2, specifically by the sliding of the slider 61 on it within the groove 62, and the other end is slidably mounted in the spiral groove 5 opened in the sleeve 3. When the rotating rod 2 rotates, because one end of the sliding rod 6 is restricted by the spiral groove 5, the sliding rod 6 will slide along the groove 62 of the rotating rod 2 under the guidance of the spiral groove 5. The blocking block 4 is slidably mounted in the groove 62 to limit the movement range of the sliding rod 6 on the rotating rod 2. The mounting seat 41 on the rotating rod 2 is threaded with an adjusting screw 42, the lower end of which is rotatably mounted on the blocking block 4. By rotating the adjusting screw 42, the position of the blocking block 4 can be adjusted, thereby changing the movement range of the sliding rod 6 and realizing the adjustment of the slewing limit. The spiral groove 5 is a spiral pattern with a height of one circle, the same as the slide groove 62, and a connecting groove 51 is provided between its two ends. When the blocking block 4 is at the highest point, the connecting groove 51 can be used to quickly return the slide groove 62 from the highest point to the lowest point, so that the crane is not restricted when in use.

[0036] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A slewing limiting device for a crane, comprising a rotating base (1) and a rotating rod (2) rotatably mounted on the rotating base (1), characterized in that: It also includes: Sleeve (3), the sleeve (3) is mounted on rotating seat (1); Spiral groove (5), the spiral groove (5) is formed inside the sleeve (3); A sliding rod (6) is slidably disposed on a rotating rod (2), and one end of the sliding rod (6) is slidably disposed in a spiral groove (5); A blocking block (4) is slidably disposed on the rotating rod (2) to limit the range of movement of the sliding rod (6) on the rotating rod (2).

2. The slewing limiting device for a crane according to claim 1, characterized in that: The sliding rod (6) is provided with a slider (61), the rotating rod (2) is provided with a groove (62), and the slider (61) is slidably disposed in the groove (62).

3. The slewing limiting device for a crane according to claim 2, characterized in that: The blocking block (4) is slidably disposed in the slide groove (62), and the rotating rod (2) is provided with a mounting seat (41). The mounting seat (41) is threaded with an adjusting screw (42), and the lower end of the adjusting screw (42) is rotatably disposed on the blocking block (4).

4. The slewing limiting device for a crane according to claim 1, characterized in that: The sleeve (3) is fitted onto the rotating rod (2), and the sleeve (3) is connected to the rotating seat (1) by bolts.

5. A slewing limiting device for a crane according to claim 1, characterized in that: The spiral groove (5) is a spiral pattern that is set in one circle, and its height is the same as that of the slide groove (62).

6. The slewing limiting device for a crane according to claim 1, characterized in that: A connecting groove (51) is provided between the two ends of the spiral groove (5).

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