Hydraulic locking device for preventing torsion counterforce

Abstract

The utility model discloses a hydraulic locking device for anti-twist counterforce, which comprises a rack, a plurality of pairs of telescopic positioning units are arranged on the rack, and each pair of telescopic positioning units comprises two telescopic positioning components which are arranged in mirror symmetry. Each telescopic positioning assembly comprises a linear module, a stop lever connected to the displacement end of the linear module and a locking assembly used for achieving radial loading on the stop lever to achieve axial limiting of the stop lever. According to the engine main cover screwing device, the engine main cover screwing quality and efficiency can be improved, and remarkable economic benefits can be brought to the automobile manufacturing industry. The breakthrough of the technology is helpful for promoting the whole industry to proceed towards higher-level precision manufacturing, and a foundation is laid for producing more reliable engines with more excellent performance.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic locking devices, in particular to a hydraulic locking device for preventing torsional reaction forces. Background Art

[0002] Engine cover tightening technology is a critical process in the automotive manufacturing industry, crucial for ensuring engine sealing, stability, and overall performance. With the rapid development of the automotive industry, the demand for engine cover tightening quality is becoming increasingly stringent. Traditional manual tightening methods are no longer able to meet the efficiency and precision requirements of modern production lines, leading to the emergence of automated tightening technology.

[0003] In modern automotive manufacturing, engine cover tightening is typically accomplished using high-torque bolt tightening machines. These machines precisely control tightening torque and angle, ensuring each bolt achieves the desired tightening level. However, preventing the workpiece (i.e., the engine cover) from rotating or shifting during the tightening process presents a pressing technical challenge.

[0004] To address this issue, the industry generally uses workpiece anti-torsion reaction devices. These devices primarily secure the workpiece during tightening, preventing unwanted displacement or deformation due to applied forces. However, currently used anti-torsion reaction devices often rely on pressing or clamping the workpiece. While this method can achieve a certain degree of workpiece stability, it also has some significant drawbacks.

[0005] First, the way the workpiece is pressed or clamped can easily damage it. Engine main covers are typically made of precision-machined metal, requiring a highly smooth and precise surface. Excessive pressure or improper clamping can leave dents, scratches, or deformations on the workpiece, which not only affects aesthetics but can also lead to poor sealing, compromising engine performance and life.

[0006] Secondly, the workpiece is under continuous pressure during the entire tightening process. This continuous stress state may cause small but cumulative deformation of the workpiece, especially for some thin or complex engine main covers. Long-term pressure may affect its original geometric shape and dimensional accuracy.

[0007] Even more challenging is the difficulty in precisely controlling the pressing and clamping forces. Excessive force can easily cause irreversible damage to the workpiece; too little force can prevent the workpiece from being effectively secured during high-torque tightening, leading to workpiece displacement. Workpiece displacement not only affects tightening quality and accuracy but can also cause serious problems such as thread damage or bolt misalignment.

[0008] Furthermore, engine main covers made of different materials and thicknesses may require different pressing or clamping forces, requiring operators to possess extensive experience and judgment. However, in a modern production line focused on high efficiency and consistency, over-reliance on human judgment is clearly not an ideal solution.

[0009] Given these challenges, the industry has been searching for more advanced and intelligent workpiece anti-torsion reaction technologies. The ideal solution should effectively prevent workpiece rotation or displacement during tightening without damaging the workpiece. Furthermore, this technology should be adaptable, suitable for different engine cover models and materials, and capable of seamless integration with existing automated production lines.

[0010] Therefore, it is urgent to develop a new, efficient and damage-free workpiece anti-torsion reaction device. Utility Model Content

[0011] The technical problem addressed by this utility model is to address the shortcomings of the existing technology by providing a hydraulic locking device for preventing torsional reaction forces. This device not only improves the quality and efficiency of tightening the engine main cover, but also brings significant economic benefits to the automotive manufacturing industry. This technological breakthrough will help propel the entire industry towards higher levels of precision manufacturing, laying the foundation for the production of more reliable and higher-performance engines.

[0012] The technical solution adopted by the present invention to solve its technical problems is: the present invention provides a hydraulic locking device for anti-torsional reaction force, including a frame, on which multiple pairs of telescopic positioning units are arranged, each pair of telescopic positioning units includes two telescopic positioning components arranged in a mirror-symmetrical manner, and each telescopic positioning component includes a linear module, a blocking rod connected to the displacement end of the linear module, and a locking assembly for radially loading the blocking rod to achieve axial limitation.

[0013] In a preferred embodiment of the present invention, a guide sleeve is provided on the frame, and the guide sleeve and the blocking rod are coaxially plugged into each other.

[0014] In a preferred embodiment of the present invention, a self-lubricating bushing is coaxially arranged between the guide sleeve and the blocking rod.

[0015] In a preferred embodiment of the present invention, the locking assembly includes a hydraulic mounting seat, a hydraulic locking sleeve is arranged in the hydraulic mounting seat, the hydraulic locking sleeve is coaxially sleeved on the outside of the barrier rod, the hydraulic locking sleeve and the hydraulic mounting seat form a hydraulic chamber, and the hydraulic mounting seat is provided with an oil inlet and an oil outlet connected to the hydraulic chamber.

[0016] In a preferred embodiment of the present invention, the end of the blocking rod is coaxially connected to a positioning head.

[0017] In a preferred embodiment of the present invention, the linear module includes a cylinder, and the piston rod of the cylinder is connected to the blocking rod.

[0018] In a preferred embodiment of the present invention, the telescopic positioning units are arranged in a one-to-one correspondence with the positioning holes on the workpiece.

[0019] In a preferred embodiment of the present invention, a pressure sensor is provided on the frame.

[0020] In a preferred embodiment of the present invention, a gas-liquid booster is provided on the frame.

[0021] In a preferred embodiment of the present invention, the frame includes a base and a column, the column is vertically arranged on the base, and the columns are provided with the multiple pairs of telescopic positioning units, and the extension direction of the multiple pairs of telescopic positioning units is perpendicular to the plane where the columns are located.

[0022] The beneficial effects of the present invention are as follows: the present invention proposes a hydraulic locking device for preventing torsional reaction force, which cleverly solves many problems existing in the traditional engine main cover tightening technology and demonstrates significant technical effects and advantages.

[0023] First, the device utilizes multiple pairs of telescopic positioning units, each consisting of two mirror-symmetrically arranged telescopic positioning components. This structure provides comprehensive support and positioning. By using a linear module to precisely control the movement of the retaining rod, combined with a locking assembly to achieve radial loading and axial limiting, the utility model effectively prevents workpiece rotation or displacement during tightening without direct contact with the workpiece surface. This non-contact positioning method significantly reduces the risk of workpiece damage, overcoming the potential for damage associated with traditional pressing or clamping methods.

[0024] Secondly, the hydraulic locking device of this utility model utilizes the hydraulic principle. Through the hydraulic chamber formed by the hydraulic locking sleeve and the hydraulic mounting base, the locking force can be precisely controlled. This design not only enables precise adjustment of the force but also allows for flexible adjustment based on the characteristics of the workpiece, effectively resolving the difficulty in controlling the pressing and clamping forces in traditional methods. The introduction of the hydraulic system also improves the device's response speed and stability, ensuring a consistently stable workpiece position during the tightening process.

[0025] Furthermore, this utility model demonstrates unique advantages in its detailed design. The coaxial plug-in connection between the guide sleeve and the stopper, coupled with the use of a self-lubricating bushing, significantly improves the operating accuracy and lifespan of the device. The design of the positioning head further enhances positioning accuracy. The pneumatic cylinder, as the power source for the linear module, provides stable and reliable telescopic power, while the one-to-one correspondence between the telescopic positioning unit and the positioning holes on the workpiece ensures accurate and reliable positioning.

[0026] This utility model also takes into account the system's intelligence and safety. The installation of pressure sensors enables real-time monitoring of the entire process, enabling timely detection and resolution of abnormalities. The introduction of a gas-liquid booster provides the system with a wider power range, adapting to diverse operating conditions. The structural design of the base and columns, coupled with the rational layout of multiple pairs of telescopic positioning units, not only enhances the stability of the entire system but also enables it to adapt to engine main covers of varying sizes and shapes.

[0027] In summary, the hydraulic locking device of this utility model effectively solves the technical difficulties encountered in the traditional engine main cover tightening process through innovative design and advanced technical means. It not only provides a reliable anti-torsion reaction force without damaging the workpiece, but also precisely controls the locking force to adapt to different types of workpieces. This design greatly improves the quality and efficiency of engine main cover tightening, reduces the defective rate, and lowers production costs. At the same time, its intelligent and modular features make it easy to integrate into modern automatic production lines, providing strong support for the further development of the automotive manufacturing industry. The application of this utility model will undoubtedly promote the development of engine manufacturing processes towards higher precision, higher efficiency, and higher quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0029] Figure 1 A schematic diagram of the present utility model;

[0030] Figure 2 This is a schematic diagram of the telescopic positioning unit of the present utility model;

[0031] Figure 3 This is a schematic diagram of the internal structure of the telescopic positioning unit of the present utility model. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0033] This embodiment provides a hydraulic locking device for preventing torsional reaction forces. Its core structure includes a frame 1, multiple pairs of telescopic positioning units, a linear module 2, a stopper 3, and a locking assembly. These components work together to achieve precise positioning and secure locking of a workpiece, effectively resolving issues such as workpiece damage and unstable positioning associated with conventional technologies.

[0034] The frame 1 of this utility model is the basic support structure of the entire device and is composed of a base 1.1 and columns 1.2. The base 1.1 provides a stable foundation, while the columns 1.2 are arranged perpendicularly to the base 1.1, forming a solid framework. The columns 1.2 are equipped with multiple pairs of telescopic positioning units, which extend perpendicular to the plane of the columns 1.2 to ensure optimal working angles and space utilization.

[0035] Each pair of telescopic positioning units consists of two mirror-symmetrically arranged telescopic positioning assemblies. This symmetrical design not only improves the balance of the device but also enables simultaneous positioning and support of workpieces from multiple directions. Each telescopic positioning assembly includes the following key components: The linear module 2 of this utility model uses a pneumatic cylinder as its power source, with its piston rod connected to the stop rod 3, providing precise linear motion.

[0036] The blocking rod 3 of the present invention is connected to the displacement end of the linear module 2 and is a core component for achieving workpiece positioning.

[0037] The locking assembly of the present invention is used to radially load the blocking rod 3, thereby achieving axial limitation thereof.

[0038] To improve positioning accuracy and operational stability, this utility model incorporates a guide sleeve 4 on the frame 1. This sleeve 4 and the retaining rod 3 are coaxially plugged together, ensuring that the retaining rod 3 maintains a high degree of straightness during movement. To reduce friction and increase service life, a self-lubricating bushing 5 is coaxially positioned between the sleeve 4 and the retaining rod 3. This design not only reduces maintenance frequency but also improves overall system efficiency.

[0039] The locking assembly is the core part of this device, and is mainly composed of the following components: Hydraulic mounting seat 7: serves as the basic structure of the hydraulic system. Hydraulic locking sleeve 6: is coaxially sleeved on the outside of the blocking rod 3, and is a key component for realizing the locking function. Hydraulic chamber 8: is surrounded by the hydraulic locking sleeve 6 and the hydraulic mounting seat 7, and is used to contain hydraulic oil. Oil inlet 7.1 and oil outlet 7.2: are arranged on the hydraulic mounting seat 7, are connected to the hydraulic chamber 8, and are used for the entry and exit of hydraulic oil. The radial clamping force of the hydraulic locking sleeve 6 on the blocking rod 3 can be adjusted by reasonably increasing or decreasing the amount of lubricating oil in the hydraulic chamber 8.

[0040] The positioning head 9 of the present invention is coaxially connected to the end of the stop rod 3 and is used to accurately position the workpiece. The pressure sensor 10 of the present invention is installed on the frame 1 to monitor system pressure and ensure safe operation. The gas-liquid booster 11 of the present invention is also installed on the frame 1 to provide a wider range of pressure regulation capabilities.

[0041] The working process of this hydraulic locking device can be divided into the following steps:

[0042] 1 Workpiece in place

[0043] First, the pallet carries the workpiece to the tightening station and stops. This process is usually completed by an external conveyor system to ensure that the workpiece is delivered to the specified location accurately.

[0044] 2 Workpiece positioning

[0045] The pallet lifting mechanism lifts the pallet and workpiece together to a predetermined height. This step ensures that the workpiece is at the optimal working height for subsequent operations.

[0046] 3 Extend and lock the lever

[0047] The stop rod 3 is extended into position under the drive of the linear module 2 (cylinder).

[0048] Subsequently, the three-position five-way center-sealed solenoid valve of the shift rod driving cylinder is switched to the center position. This operation causes the shift rod 3 to no longer be subjected to the forward thrust.

[0049] Next, the hydraulic locking sleeve 6 begins to lock the stop bar 3. The locking force is set to 20 kN. This force has been accurately calculated and can effectively fix the stop bar 3 without damaging the workpiece.

[0050] At this point, the bars 3 around the workpiece act as "dead stops" for the workpiece, effectively locking the workpiece's shape. It's worth noting that this locking method doesn't apply direct pressure to the workpiece, thus avoiding the risk of deformation or damage.

[0051] 4. Tighten the bolts

[0052] After the workpiece is firmly positioned, the tightening spindle begins to tighten the bolts. Since the workpiece is firmly fixed, it will not rotate or move during the entire tightening process, ensuring the accuracy and quality of the tightening.

[0053] 5 Reset

[0054] After the tightening work is completed, each component returns to its original position according to the preset program, ready for processing the next workpiece.

[0055] The use of this utility model has the following advantages:

[0056] 1. Non-contact positioning: Through the cooperation of the blocking rod 3 and the positioning head 9, non-contact positioning of the workpiece is achieved, which greatly reduces the risk of damage to the workpiece.

[0057] 2. Precise force control: The hydraulic locking system can precisely control the locking force to ensure that the workpiece is firmly fixed without being subjected to excessive pressure.

[0058] 3. High adaptability: The design of multiple pairs of telescopic positioning units enables the device to adapt to workpieces of different sizes and shapes.

[0059] 4. Intelligent monitoring: The setting of the pressure sensor 10 realizes real-time monitoring of the system pressure and improves the safety of operation.

[0060] 5. Flexible adjustment: The introduction of the gas-liquid booster 11 enables the system to have a larger pressure adjustment range and can adapt to the needs of different working conditions.

[0061] 6. High-precision operation: The use of the guide sleeve 4 and the self-lubricating bushing 5 ensures the high-precision movement of the blocking rod 3 and improves the positioning accuracy of the entire system.

[0062] 7. Modular design: The modular design of each component facilitates maintenance and replacement, thus increasing the service life and efficiency of the device.

[0063] This hydraulic locking device is not only suitable for tightening engine main covers, but can also be widely used in other industrial scenarios requiring precise positioning and anti-torsion reaction forces. For example, this technology can be applied in the assembly of large mechanical parts and the debugging of precision instruments. With the continuous advancement of Industry 4.0 and smart manufacturing, this intelligent, modular hydraulic locking device will play an increasingly important role in automated production lines, making a significant contribution to improving product quality and reducing production costs.

[0064] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply 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 a limitation on this application. 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 an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0065] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises", "includes" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0066] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A hydraulic locking device for anti-torsion reaction force, characterized in that: The invention comprises a frame (1), wherein the frame (1) is provided with a plurality of pairs of telescopic positioning units, each pair of telescopic positioning units comprises two telescopic positioning assemblies arranged in mirror symmetry, and each telescopic positioning assembly comprises a linear module (2), a stop rod (3) connected to a displacement end of the linear module (2), and a locking assembly for radially loading the stop rod (3) to achieve axial limitation thereof.

2. A hydraulic locking device for anti-torsion reaction according to claim 1, characterized in that: A guide sleeve (4) is provided on the frame (1), and the guide sleeve (4) and the blocking rod (3) are coaxially plugged into each other.

3. A hydraulic locking device for anti-torsional reaction according to claim 2, characterized in that: A self-lubricating bushing (5) is coaxially arranged between the guide sleeve (4) and the blocking rod (3).

4. A hydraulic locking device for anti-torsional reaction according to claim 1, characterized in that: The locking assembly includes a hydraulic mounting seat (7), a hydraulic locking sleeve (6) is provided in the hydraulic mounting seat (7), the hydraulic locking sleeve (6) is coaxially sleeved on the outside of the blocking rod (3), the hydraulic locking sleeve (6) and the hydraulic mounting seat (7) enclose a hydraulic chamber (8), and the hydraulic mounting seat (7) is provided with an oil inlet (7.1) and an oil outlet (7.2) connected to the hydraulic chamber (8).

5. A hydraulic locking device for anti-torsion reaction according to claim 1, characterized in that: The end of the blocking rod (3) is coaxially connected to a positioning head (9).

6. A hydraulic locking device for anti-torsion reaction according to claim 1, characterized in that: The linear module (2) comprises a cylinder, and the piston rod of the cylinder is connected to the blocking rod (3).

7. A hydraulic locking device for preventing torsional reaction according to claim 1, characterized in that: The telescopic positioning units are arranged in one-to-one correspondence with the positioning holes on the workpiece.

8. The hydraulic locking device for preventing torsional reaction according to claim 1, characterized in that: A pressure sensor (10) is provided on the frame (1).

9. A hydraulic locking device for preventing torsional reaction according to claim 1, characterized in that: A gas-liquid booster (11) is provided on the frame (1).

10. A hydraulic locking device for preventing torsional reaction according to claim 1, characterized in that: The frame (1) comprises a base (1.1) and a column (1.2), the column (1.2) being vertically arranged on the base (1.1), the columns (1.2) being provided with the multiple pairs of telescopic positioning units, and the extension directions of the multiple pairs of telescopic positioning units being perpendicular to the plane on which the columns (1.2) are located.

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