Hydraulic wrist quick connection positioning device

Abstract

The utility model discloses a hydraulic wrist quick connection positioning device, the positioning device is including the fixed setting of hydraulic wrist bottom one end's positioning component and the clamping between the hydraulic wrist bottom and the tool top's connecting mechanism. The utility model can effectively reach the improvement operation efficiency, the flexibility of enhancing hydraulic wrist and the maintenance cost of reducing device. The utility model is suitable for all kinds of engineering construction scene, such as mining, road construction, building demolition, hydraulic engineering, earthwork operation etc. need frequently change excavator tool operation environment, for realizing the quick, accurate connection and positioning between the front end tool of excavator, such as, excavator bucket, breaking hammer, hydraulic shear, vibrating ram etc. and hydraulic wrist.

Description

Technical Field

[0001] This utility model belongs to the field of assembly parts technology, and relates to a connection and positioning device, specifically a hydraulic wrist quick connection and positioning device. Background Technology

[0002] Hydraulic wrist-connected positioning devices, as key components in industrial automation, engineering machinery and other fields, possess high driving force and precise control potential. However, existing problems in efficiency, flexibility and maintenance are hindering their further development and widespread application.

[0003] In terms of efficiency, some hydraulic wrist-connected positioning devices suffer from significant energy loss during transmission due to unreasonable transmission structure design. Taking some traditional industrial robotic arms as an example, the chaotic layout and excessive bends in their internal hydraulic transmission systems increase hydraulic oil flow resistance, drastically reduce power transmission efficiency, and cause sluggish mechanical response, making it difficult to meet the high-speed operation requirements of modern industrial production lines. Furthermore, the positioning system lacks advanced sensing and feedback mechanisms, requiring lengthy manual calibration and adjustments before each task. Frequent adjustments not only reduce the effective working time of the equipment but also increase the workload of operators, severely impacting overall production efficiency.

[0004] In terms of flexibility, limited by their fixed mechanical structure design, the swing angle and degrees of freedom of hydraulic wrist-connected positioning devices often fail to meet the requirements of complex work scenarios. Most devices can only swing within ±40°. In confined spaces or work environments requiring multi-angle operation, such as component assembly in the aerospace field or internal maintenance of precision instruments, the device cannot flexibly adjust its attitude and position, hindering smooth operation. Furthermore, its motion patterns are relatively simple, lacking multi-degree-of-freedom coordinated motion capabilities, making it unable to complete complex spatial trajectory planning and failing to meet the demands of modern industry for refined and diversified operations.

[0005] High maintenance costs are a major obstacle to the application of hydraulic wrist connection and positioning devices. Hydraulic systems have extremely high requirements for sealing performance, but in actual use, seals are subjected to harsh conditions of high pressure and high-frequency vibration for extended periods, making them prone to aging and wear. Once the seals are damaged, hydraulic oil leakage occurs, not only wasting resources and polluting the working environment, but also potentially causing equipment failure due to unstable hydraulic system pressure, and even damaging other critical components. Furthermore, the complex internal structure of hydraulic systems requires specialized testing equipment and experienced technicians for troubleshooting, resulting in difficult and time-consuming repairs. At the same time, domestic production technology for some key components, such as high-precision hydraulic valves and high-performance seals, is not yet mature, necessitating imports, leading to high procurement costs and long lead times, further exacerbating maintenance cost pressures.

[0006] The cumbersome process of changing attachments is also a major drawback of this device. Currently, the compatibility between hydraulic wrist connection and positioning devices and attachments on the market is generally poor. Devices and attachments from different manufacturers lack standardized specifications in terms of interface dimensions, shapes, and hydraulic parameters. When companies need to replace attachments with different types to adapt to diverse production needs, they must not only disassemble and reinstall the mechanical connections, but also readjust the hydraulic lines and match the control system parameters. The entire process involves numerous steps and requires a high level of technical skill from the operators. Slight mistakes can lead to improper installation or insecure connections, affecting operational safety and equipment stability, and reducing production efficiency.

[0007] The issue of hydraulic line interface connection is equally important. During actual installation and use, due to insufficient manufacturing precision, installation errors, and vibrations during equipment operation, the hydraulic line interfaces of the hydraulic wrist connection positioning device are prone to inaccurate connection. Once the interface is not precisely connected, the sealing performance will be significantly compromised, leading to hydraulic oil leakage. Initial minor leaks may go unnoticed, but over time, they will gradually affect the pressure and flow stability of the hydraulic system, causing equipment performance degradation and even equipment failure and shutdown. Furthermore, if leaked hydraulic oil is not cleaned up promptly, it may also cause fires and other safety hazards, threatening production safety.

[0008] The lack of versatility is a significant factor hindering the development of hydraulic wrist connection and positioning devices. Currently, the industry lacks unified design and manufacturing standards. In pursuit of product differentiation, manufacturers act independently regarding interface specifications, control protocols, and hydraulic parameters, leading to incompatibility between attachments and equipment of different brands and models. During procurement and use, companies often need to select matching attachments based on specific devices or customize dedicated connection and positioning devices for new attachments. This not only significantly increases procurement costs and management complexity but also limits the versatility and interchangeability of equipment, hindering resource sharing and collaborative development within the industry and impeding the overall scaling and standardization process of the industry.

[0009] In conclusion, if hydraulic wrist connection and positioning devices are to achieve wider application and development in modern industrial fields, it is imperative to optimize the transmission and positioning system through technological innovation, improve structural design to enhance flexibility, strengthen sealing technology research and development to reduce maintenance costs, and unify standards and specifications to solve problems such as attachment replacement, interface docking, and universality, thereby breaking through development bottlenecks and meeting the ever-growing needs of industrial production. Utility Model Content

[0010] To address the aforementioned shortcomings in the existing technology, this utility model aims to provide a hydraulic wrist quick connection and positioning device, thereby improving work efficiency, enhancing the flexibility of the hydraulic wrist, and reducing device maintenance costs.

[0011] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0012] A hydraulic wrist quick-connect positioning device includes a positioning component fixedly disposed at one end of the bottom of the hydraulic wrist and a connecting mechanism clamped between the bottom of the hydraulic wrist and the top of the attachment.

[0013] As a limitation of this utility model, the positioning component includes at least two claws fixedly disposed at one end of the bottom of the hydraulic wrist; limit rods are fixedly disposed on both sides of the outer side of the hydraulic wrist near the claws.

[0014] As another limitation of this utility model, the connecting mechanism includes a connecting plate. Positioning pieces are fixedly provided on both sides of the top of the connecting plate along the length direction of the connecting plate. Positioning holes are opened at both ends of each positioning piece. The positioning holes on different positioning pieces correspond to each other. A first limiting shaft and a second limiting shaft are respectively sandwiched between each pair of corresponding positioning holes. The two ends of the first limiting shaft and the second limiting shaft are respectively inserted into the positioning holes at two corresponding positions.

[0015] As a further limitation of this utility model, at least two reinforcing blocks are fixedly clamped between the two positioning pieces.

[0016] As a further limitation of this utility model, multiple fixing screw holes are provided at both ends of the connecting plate and between the two positioning plates. Each fixing screw hole is provided with an internal thread, and each fixing screw hole is provided with a fixing bolt having an external thread that matches the internal thread of the fixing screw hole.

[0017] As a further limitation of this utility model, each fixing bolt is fitted with a fixing nut at its bottom that matches the external thread of the fixing bolt.

[0018] As a third limitation of this utility model, a positioning groove is provided at the top of one end of the positioning piece where the positioning hole of the first limiting shaft is located.

[0019] As a further limitation of this utility model, the claws fixedly installed at the bottom of the hydraulic wrist are engaged with the first limiting shaft; the limiting rods fixedly installed on both sides of the hydraulic wrist are engaged in the positioning grooves opened at the top of the positioning plate.

[0020] By adopting the above-mentioned technical solution, the beneficial effects achieved by this utility model compared with the prior art are as follows:

[0021] (1) The present invention relates to a hydraulic wrist quick connection positioning device, which avoids problems such as damage to hydraulic components, hydraulic oil leakage, and dust pollution caused by improper connection when switching attachments through quick positioning and stable connection; and prevents the excavator's lower tool attachments from falling off due to insecure connection, thereby reducing the risk of operational safety.

[0022] (2) The present invention relates to a hydraulic wrist quick connection positioning device with quick locking and oil circuit interface alignment functions, which greatly reduces the time spent changing different attachments, realizes quick switching of working tools, and improves the overall working efficiency of excavators; the oil circuit interface can be automatically or manually adjusted without cumbersome debugging, further shortening downtime.

[0023] (3) The hydraulic wrist quick connection positioning device involved in this utility model reduces manual operation and mechanical wear, reduces the failure rate of the hydraulic system, thereby reducing maintenance frequency and maintenance costs; precise oil circuit docking prevents hydraulic oil leakage, avoiding additional maintenance costs and environmental pollution control costs caused by leakage; it can be adapted to tooling oil circuit interfaces with various layouts, enhances the excavator's compatibility with different attachments, and reduces the need for repeated equipment purchases.

[0024] (4) The hydraulic wrist quick connection positioning device involved in this utility model has a combination design of claw and limit rod to ensure quick positioning of hydraulic wrist and attachment. Through the cooperation of positioning plate, limit shaft and positioning groove, accurate alignment and locking are achieved during connection. The reinforcing block and fixing bolt enhance the structural strength of the connecting plate, prevent the connection part from loosening or breaking, and ensure the stability during operation. The fixing nut further improves the reliability of the connection and avoids the bolt from loosening due to vibration and other factors.

[0025] (5) The hydraulic wrist quick connection and positioning device involved in this utility model reduces the impact of external pollutants on the hydraulic system and extends the service life of the equipment by means of tight connection and dustproof design in complex working conditions (such as dusty and vibrating environments).

[0026] In summary, the hydraulic wrist quick-connect positioning device of this utility model, through rapid positioning and stable connection, can avoid problems such as damage to hydraulic components, hydraulic oil leakage, and dust pollution caused by improper connection during attachment switching, and prevent tooling attachments from falling off to reduce safety risks. Its quick locking and oil circuit interface alignment functions can significantly reduce the time spent on attachment replacement, shorten downtime, and significantly improve work efficiency. This device can also reduce manual operation and mechanical wear, reduce the failure rate of the hydraulic system, accurately connect the oil circuit to avoid hydraulic oil leakage, reduce maintenance costs and environmental pollution risks, and adapt to various tooling interfaces to enhance equipment compatibility. In terms of structural design, components such as claws, limit rods, positioning plates, and limit shafts work together to achieve precise alignment and locking, while reinforcing blocks, fixing bolts, and nuts enhance connection strength and reliability. In addition, under complex working conditions, tight connection and dustproof design can reduce external pollution and extend the service life of the equipment.

[0027] This utility model is applicable to various engineering construction scenarios, such as mining, road construction, building demolition, water conservancy projects, earthwork operations, and other working environments that require frequent changes of excavator attachments. It is used to achieve rapid and precise connection and positioning between the excavator's front-end tool attachments (such as buckets, breakers, hydraulic shears, vibratory rammers, etc.) and the hydraulic wrist. Attached Figure Description

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0029] Figure 1 This is a structural diagram showing the connection state of an embodiment of the present utility model;

[0030] Figure 2 This is a left view showing the connection state of an embodiment of this utility model;

[0031] Figure 3 This is a schematic diagram of the structure in the open state according to an embodiment of the present invention;

[0032] Figure 4 for Figure 3 Enlarged view of section A in the middle;

[0033] Figure 5 for Figure 3 Rear view of section A.

[0034] In the diagram: 1. First limiting shaft; 2. Limiting rod; 3. Positioning groove; 4. Positioning piece; 5. Reinforcing block; 6. Second limiting shaft; 7. Claw; 8. Fixing bolt; 9. Attachment; 10. Hydraulic wrist. Detailed Implementation

[0035] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0036] An embodiment of a hydraulic wrist quick-connect positioning device

[0037] like Figures 1 to 5 As shown, this embodiment relates to a hydraulic wrist quick connection positioning device, including a positioning component fixedly disposed at one end of the bottom of the hydraulic wrist 10 and a connecting mechanism clamped between the bottom of the hydraulic wrist 10 and the top of the attachment 9.

[0038] The positioning assembly includes at least two claws 7 fixedly installed at one end of the bottom of the hydraulic wrist; limit rods 2 are fixedly installed on both sides of the outside of the hydraulic wrist near the claws 7.

[0039] The connecting mechanism includes a connecting plate. Positioning pieces 4 are fixedly provided on both sides of the top of the connecting plate along the length direction of the connecting plate. Positioning holes are provided at both ends of each positioning piece 4. The positioning holes on different positioning pieces 4 correspond to each other. A first limiting shaft 1 and a second limiting shaft 6 are respectively sandwiched between each pair of corresponding positioning holes. The two ends of the first limiting shaft 1 and the second limiting shaft 6 are respectively inserted into the positioning holes at two corresponding positions.

[0040] At least two reinforcing blocks 5 are fixedly clamped between the two positioning plates 4.

[0041] Multiple fixing screw holes are provided at both ends of the connecting plate and between the two positioning pieces 4. Each fixing screw hole has an internal thread and a fixing bolt 8 with an external thread that matches the internal thread of the fixing screw hole.

[0042] Each fixing bolt 8 has a fixing nut fitted at its bottom that matches the external thread of the fixing bolt 8.

[0043] A positioning groove 3 is provided on the top of one end of the positioning piece 4 where the positioning hole of the first limiting shaft 1 is located.

[0044] The pawl 7 fixedly installed at the bottom of the hydraulic wrist 10 is engaged with the first limiting shaft 1; the limiting rods 2 fixedly installed on both sides of the hydraulic wrist 10 are engaged in the positioning grooves 3 opened at the top of the positioning plate 4.

[0045] When using this embodiment, select a suitable attachment based on the current working conditions, fix the connecting plate to the connector on the attachment 9 using the fixing bolts 8 and fixing nuts, move the hydraulic wrist 10 above the attachment 9, align the claw 7 at the bottom of the hydraulic wrist 10 with the first limiting shaft 1 in the connecting mechanism, and align the limiting rods 2 on both sides with the positioning groove 3 at the top of the positioning plate 4, thus completing the initial position correspondence.

[0046] By engaging the claw 7 into the first limiting shaft 1 and the limiting rod 2 into the positioning groove 3, the positioning component and the connecting mechanism achieve precise positioning, ensuring that the hydraulic wrist 10 and the attachment 9 are accurately aligned in the horizontal and vertical directions, and preventing instability caused by connection deviation.

[0047] Meanwhile, the reinforcing blocks 5 between the positioning plates 4 enhance the structural strength of the connecting plate, ensuring that the connection will not deform or loosen during the tightening of the fixing bolts and subsequent operations, thus ensuring the stability of the connection.

[0048] While the mechanical structure is connected, the hydraulic wrist 10 and the oil circuit interface of the attachment 8 are automatically or manually adjusted to the alignment state during the positioning and connection process, so as to realize the rapid and accurate docking of the hydraulic oil circuit and provide hydraulic power support for the normal operation of the attachment.

[0049] Once connected, the excavator can be put into operation immediately, utilizing the 360-degree rotation and tilting capabilities of the hydraulic wrist 10 in conjunction with the securely connected attachment 9. When attachment 9 needs to be replaced again, loosen the fixing nut and fixing bolt 8, and disengage the pawl 7 and limit rod 2 of the hydraulic wrist 10 from the connection mechanism to quickly disassemble attachment 9 for the next connection and replacement operation.

[0050] It should be noted that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hydraulic wrist quick-connect positioning device, characterized in that: The positioning device includes a positioning component fixedly installed at one end of the bottom of the hydraulic wrist and a connecting mechanism clamped between the bottom of the hydraulic wrist and the top of the attachment. The positioning component includes at least two claws fixedly disposed at one end of the bottom of the hydraulic wrist; limit rods are fixedly disposed on both sides of the outer side of the hydraulic wrist near the claws; The connecting mechanism includes a connecting plate. Positioning pieces are fixedly provided on both sides of the top of the connecting plate along the length direction of the connecting plate. Positioning holes are provided at both ends of each positioning piece. The positioning holes on different positioning pieces correspond to each other. A first limiting shaft and a second limiting shaft are respectively sandwiched between each pair of corresponding positioning holes. The ends of the first limiting shaft and the second limiting shaft are respectively inserted into the positioning holes at two corresponding positions.

2. The hydraulic wrist quick-connect positioning device according to claim 1, characterized in that: At least two reinforcing blocks are fixedly clamped between the two positioning pieces.

3. The hydraulic wrist quick-connect positioning device according to claim 1, characterized in that: The connecting plate has multiple fixing screw holes at both ends and between the two positioning pieces. Each fixing screw hole has an internal thread and a fixing bolt with an external thread that matches the internal thread of the fixing screw hole.

4. The hydraulic wrist quick-connect positioning device according to claim 3, characterized in that: Each of the fixing bolts is fitted with a fixing nut at its bottom that matches the external thread of the fixing bolt.

5. The hydraulic wrist quick-connect positioning device according to claim 3, characterized in that: A positioning groove is provided at the top of one end of the positioning piece where the positioning hole for clamping the first limiting shaft is located; The bottom of the hydraulic wrist is fixedly provided with a pawl, which is engaged with the first limiting shaft; the limiting rods fixedly provided on both sides of the hydraulic wrist are engaged in the positioning grooves opened on the top of the positioning plate.

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