A kind of steel cable guide wheel pin shaft anti-loosening fixing structure for grab bucket
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUXI XINHUA LIFTING TOOLS CO LTD
- Filing Date
- 2025-07-02
- Publication Date
- 2026-08-07
AI Technical Summary
[0003]传统的钢索导轮销轴固定方式，例如采用螺母、圆螺母等，在抓斗工作过程中，由于钢索导轮始终受到轴向力的作用，这些固定方式容易出现松脱现象，导致销轴损坏，甚至造成安全事故
采用卡板卡入轴向槽的结构，能够有效防止销轴在轴向受力情况下松脱。结构简单，易于加工制造，安装和拆卸方便。 螺栓和挡板的双重防转设计，进一步提高了销轴的固定可靠性。
Smart Images
Figure CN224604533U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of grab bucket machinery technology, specifically a steel cable guide wheel pin anti-loosening fixing structure for grab buckets. Background Technology
[0002] Grab buckets are commonly used material handling equipment in engineering machinery, widely applied in ports, mines, construction sites, and other locations. The cable guide pulley is a crucial component of the grab bucket, guiding the movement of the cable; the way its pin is fixed directly affects the grab bucket's stability and safety.
[0003] Traditional methods of fixing steel cable guide wheels, such as using nuts or round nuts, are prone to loosening during the operation of the grab bucket because the steel cable guide wheels are always subjected to axial forces. This can lead to damage to the pins and even safety accidents.
[0004] Therefore, a more reliable pin fixing structure is needed to ensure the normal operation of the grab bucket. Utility Model Content
[0005] Purpose of the utility model: To overcome the shortcomings of the prior art and provide a steel cable guide wheel pin anti-loosening fixing structure for grab buckets. This structure can effectively prevent the pin from loosening under axial force, thereby improving the stability and safety of the grab bucket.
[0006] To achieve the above objectives, this utility model provides the following technical solution: A grab bucket cable guide wheel pin anti-loosening fixing structure, comprising a pin and a retaining ring, characterized in that: One end of the pin is provided with an axial groove, and this end is milled flat; The retaining ring is embedded in the milled flat end of the pin and can rotate 90°; The retaining ring is provided with a retaining plate. After rotating 90°, the retaining plate is engaged in the axial groove of the pin to achieve axial fixation. The retaining ring is fixed by bolts to prevent it from rotating; The other end of the pin is prevented from rotating by a baffle.
[0007] Furthermore, the bolt is a set screw used to lock the retaining ring and prevent it from rotating.
[0008] Furthermore, the baffle is fixedly connected to the guide wheel bracket to restrict the rotation of the pin.
[0009] Furthermore, the depth and width of the axial groove of the pin are matched with the size of the retaining plate on the retaining ring to ensure that the retaining plate can be reliably engaged in the groove.
[0010] Compared with the prior art, the beneficial effects of this utility model are: The structure, which uses a retaining plate to engage with the axial groove, effectively prevents the pin from loosening under axial force. It features a simple structure, is easy to manufacture, and is convenient to install and disassemble. The dual anti-rotation design of bolts and a retaining plate further enhances the reliability of the pin's fixation. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the installation structure of this utility model.
[0012] Figure 2 This is a schematic diagram of the retaining ring structure of this utility model.
[0013] Figure 3 This is a schematic diagram of the pin structure of this utility model.
[0014] In the diagram: 1. Pin; 2. Retaining ring; 3. Guide wheel; 4. Clamping plate. Detailed Implementation
[0015] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.
[0016] like Figure 1-3 As shown, the anti-loosening fixing structure of the steel cable guide wheel 3 and pin 1 for the grab bucket of this utility model includes a pin 1 and a retaining ring 2. One end of the pin 1 is provided with an axial groove, and this end is milled flat. The retaining ring 2 is embedded in the milled flat end of the pin 1 and can rotate 90°. A retaining plate 4 is provided on the retaining ring 2. After rotating 90°, the retaining plate 4 is engaged in the axial groove of the pin 1 to achieve axial fixation. The retaining ring 2 is fixed by bolts to prevent it from rotating. The other end of the pin 1 is prevented from rotating by a baffle.
[0017] During installation, first pass the pin 1 through the guide wheel 3, then insert the retaining ring 2 into the milled end of the pin 1, rotate it 90°, and let the retaining plate 4 on the retaining ring 2 engage with the axial groove of the pin 1. Then, tighten the retaining ring 2 with bolts to prevent it from rotating. Finally, restrict the rotation of the pin 1 by using a baffle.
[0018] During operation, the steel cable guide wheel 3 is subjected to axial force. Because the retaining plate 4 on the retaining ring 2 is engaged in the axial groove of the pin 1, it can effectively prevent the pin 1 from moving axially. At the same time, the anti-rotation function of the bolts and the retaining plate further ensures the fixed reliability of the pin 1.
[0019] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A locking structure for preventing loosening of a steel cable guide wheel pin in a grab bucket, comprising a pin and a retaining ring, characterized in that: One end of the pin is provided with an axial groove, and this end is milled flat; The retaining ring is embedded in the milled flat end of the pin and can rotate 90°; The retaining ring is provided with a retaining plate. After rotating 90°, the retaining plate is engaged in the axial groove of the pin. The retaining ring is fixed by bolts to prevent it from rotating; The other end of the pin is prevented from rotating by a baffle.
2. The anti-loosening fixing structure for the steel cable guide wheel pin of the grab bucket according to claim 1, characterized in that: The bolt is a set screw used to lock the retaining ring.
3. The anti-loosening fixing structure for the steel cable guide wheel pin of the grab bucket according to claim 1, characterized in that: The baffle is fixedly connected to the guide wheel bracket and is used to restrict the rotation of the pin.
4. The anti-loosening fixing structure for the steel cable guide wheel pin of the grab bucket according to claim 1, characterized in that: The depth and width of the axial groove of the pin are matched with the dimensions of the retaining plate on the retaining ring.