An adaptive balancing cylinder device for a gear grinding machine

Abstract

The present application belongs to the field of mechanical processing, and relates to a self-adaptive balancing oil cylinder device of a gear grinding machine, aiming at solving the limitations of traditional balancing oil cylinder devices in gear grinding machine processing. The device comprises a cylinder, a piston rod and a guide rod. The piston rod is connected with the end head by a thread, facilitating maintenance. The cylinder is embedded in the sliding plate hole, and self-adaptive adjustment is realized through a spherical gasket group, keeping the movement stable. The accumulator oil supply assembly provides stable pressure oil, ensuring the balance pressure. The device saves the manufacturing cost, reduces the requirement for processing precision, improves the movement stability and processing precision, prolongs the service life of the oil cylinder and the screw rod, and is convenient for installation and maintenance, suitable for complex processing environment and improving the movement stability.

Description

Technical Field

[0001] This invention belongs to the field of machining and relates to an adaptive balancing cylinder device for a gear grinding machine. Background Technology

[0002] In the gear grinding process, the Z-axis, as the feed axis, has a crucial impact on the motion accuracy and stability of the entire machining process. The Z-axis motor drives the lead screw through a reducer or synchronous belt mechanism, which in turn moves the slide and tool holder up and down to complete the precision machining of the gear. In this process, the total weight of the slide and tool holder is often quite large, for example, it may reach around 1000 kg in some cases, which places a heavy load on the Z-axis motor and lead screw.

[0003] To reduce the load on the Z-axis motor and lead screw, improve machining efficiency, and extend the service life of related components, gear grinding machines typically employ a balancing cylinder device. The main function of the balancing cylinder device is to provide a stable reaction force when the slide plate and tool holder move up and down, counteracting part or all of the gravity, thereby reducing the load on the motor and lead screw, and also contributing to vibration reduction.

[0004] However, traditional balancing cylinder devices have some design limitations. Traditional structures often employ a fixed cylinder body and a moving piston rod. This design places extremely high demands on the machining and assembly precision of the cylinder and related mating parts. Even minor errors during machining or assembly can cause the cylinder to jam or run unevenly, thus affecting the Z-axis motion accuracy and machining quality.

[0005] Specifically, in traditional balancing hydraulic cylinder devices, the cylinder body is typically fixed to a certain part of the machine tool, while the piston rod is connected to the slide or tool post for vertical movement. During operation, if the clearance between the cylinder body or piston rod and the relevant mating parts is improper, or if machining errors exist, the cylinder may experience unnecessary resistance or even jamming. This not only affects the smoothness of the Z-axis movement but can also severely impact machining accuracy.

[0006] Furthermore, traditional hydraulic cylinder devices also present certain inconveniences in terms of maintenance and upkeep. Since the cylinder body and piston rod are usually fixedly connected, once a malfunction occurs or repair is needed, it often requires the disassembly of many parts, increasing the difficulty and cost of maintenance.

[0007] To address the aforementioned issues, the gear grinding machine industry has been seeking more advanced and reliable balancing cylinder device designs. These solutions aim to improve the smoothness of movement and machining accuracy of the balancing cylinder device, while reducing the requirements for the machining and assembly accuracy of related components, and decreasing the difficulty and cost of maintenance. Summary of the Invention

[0008] In view of this, the purpose of the present invention is to provide an adaptive balancing cylinder device for a gear grinding machine to solve the existing problems.

[0009] To achieve the above objectives, the present invention provides the following technical solution: an adaptive balancing cylinder device for a gear grinding machine, mounted on a base and embedded in the mounting hole of a slide assembly, comprising a cylinder, a piston rod disposed within the cylinder, and a guide rod disposed at the top of the cylinder. The bottom of the piston rod is disposed on the base and connected to an accumulator oil supply assembly via an oil pipe connector for supplying pressurized oil to the balancing cylinder. The piston rod consists of a piston rod body and a piston rod end connected by threads, with its lower end supported on the base and connected to the oil pipe connector. The guide rod is threadedly connected to the cylinder, passes through the slide assembly with clearance fit, and is limited at the top by a retaining ring. An adaptive washer assembly is also provided between the cylinder end face and the inner end face of the slide assembly, the adaptive washer assembly consisting of a flat washer, a spherical washer, and a conical washer.

[0010] Optionally, the adaptive washer group consists of a flat washer, a spherical washer, and a conical washer in the order from top to bottom, so that the cylinder can adaptively adjust its angle during the up-and-down movement of the slide assembly without affecting the motion accuracy.

[0011] Optionally, the top of the guide rod is provided with an O-ring seal to prevent cutting fluid and grinding debris from entering; an exhaust plug is also provided at the top to discharge air from the cylinder.

[0012] Optionally, the vent plug at the top of the guide rod and the retaining ring are integrated in the same axial position to ensure that the sealing and limiting functions do not interfere with each other.

[0013] Optionally, the segmented threaded connection structure between the piston rod end and the piston rod body facilitates disassembly and maintenance.

[0014] Optionally, the accumulator oil supply assembly includes a pressure sensor that can monitor and automatically adjust the balance pressure in real time to maintain stable thrust.

[0015] Optionally, the cylinder and guide rod, and the piston rod and base are all non-fixed floating connections, and are only restricted from disengaging by retaining rings.

[0016] Optionally, the outer wall of the cylinder barrel and the inner wall of the mounting hole of the slide plate assembly are fitted with a clearance to reduce the machining accuracy requirements.

[0017] Optionally, a sealing ring is also provided between the lower inner wall of the cylinder and the piston rod.

[0018] The beneficial effects of this invention are as follows:

[0019] Cost savings: Through optimized design, this device eliminates the need for high machining precision in components such as the hydraulic cylinder, slide plate hole, and base support surface. Assembly is quick and convenient, eliminating the need for repeated adjustments, thus reducing manufacturing costs. This design approach reduces the demand for precision machining and assembly, making the production process more economical and efficient.

[0020] Improved motion stability: The balancing cylinder device uses cylinder body movement, with the cylinder body embedded in the slide plate hole and adaptively adjusted via a spherical washer assembly. This design allows the cylinder to automatically adapt to the movement of the slide plate assembly during Z-axis movement, maintaining stable operation without affecting the Z-axis motion accuracy.

[0021] Improved machining accuracy: Because the balancing cylinder device maintains stability during operation, and the hydraulic pressure provides damping and vibration reduction, the machining accuracy of the gear grinding machine is significantly improved. This is especially important for gears requiring high-precision machining, ensuring that the machined gears meet process requirements.

[0022] Extended service life: By reducing the load on the motor and lead screw, and improving motion smoothness and machining accuracy, this device helps extend the service life of relevant components in the gear grinding machine. In particular, critical components such as the motor, bearings, and lead screw will experience reduced wear and failure rates due to the reduced load and smoother motion.

[0023] Easy installation and maintenance: The piston rod of the balance cylinder device features a segmented design at the lower end with threaded connections, facilitating installation and maintenance. This design allows for faster and more convenient replacement or repair of cylinder components, reducing downtime and maintenance costs.

[0024] Adaptive Adjustment Capability: This device utilizes a spherical washer assembly design, enabling the hydraulic cylinder to adaptively adjust during operation to meet the demands of different working conditions. This adaptive adjustment capability makes the device more flexible and reliable, capable of adapting to various complex processing environments.

[0025] Stable and reliable balancing pressure: The accumulator oil supply assembly provides a stable pressure of oil to the balancing cylinder, enabling it to maintain a stable balancing pressure during operation. This stable and reliable balancing pressure helps ensure the machining accuracy and stability of the gear grinding machine, while reducing machining accuracy errors that may be caused by pressure fluctuations.

[0026] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0027] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein:

[0028] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the hydraulic principle of the balance cylinder of the present invention.

[0030] Reference numerals: 1. Exhaust plug; 2. Snap ring; 3. O-ring; 4. Guide rod; 5. Slide plate assembly; 6. Flat washer; 7. Spherical washer; 8. Conical washer; 9. Cylinder; 10. Piston rod body; 11. Sealing ring; 12. Piston rod end; 13. Base; 14. Oil pipe connector. Detailed Implementation

[0031] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0032] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0033] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0034] Please see Figures 1-2This is a specific implementation of an adaptive balancing hydraulic cylinder device for a gear grinding machine.

[0035] Example 1,

[0036] Figure 1 The specific structure of an adaptive balancing cylinder device for a gear grinding machine is shown. The device is mounted on a base 13 and embedded in the mounting hole of a slide assembly 5. The device mainly includes a cylinder 9, a piston rod body 10 disposed within the cylinder 9, and a guide rod 4 disposed at the top of the cylinder.

[0037] Specifically, the piston rod consists of a piston rod body 10 and a piston rod end 12 connected by threads. This segmented design facilitates disassembly and maintenance. The bottom end face of the piston rod end 12 is supported on the base 13 and connected to the accumulator oil supply assembly via an oil pipe connector 14. The accumulator oil supply assembly provides stable pressurized oil to the balance cylinder. A pressure sensor (not explicitly shown in the figure, but part of the system) is also installed in the oil supply line to monitor and automatically adjust the balance pressure in real time to maintain stable thrust.

[0038] The guide rod 4 is threaded to the cylinder 9 and passes through the slide plate assembly 5. The two are clearance-fitted to ensure the guide rod 4 can move freely radially. The top of the guide rod 4 is limited by a retaining ring 2 to prevent it from dislodging. In addition, an O-ring 3 is provided at the top of the guide rod 4 for sealing, preventing cutting fluid and metal shavings from entering the cylinder. A vent plug 1 is also provided at the top to expel air from the cylinder, ensuring stable internal pressure.

[0039] An adaptive washer assembly is provided between the end face of the cylinder 9 and the inner end face of the slide plate assembly 5. This washer assembly consists of a flat washer 6, a spherical washer 7, and a conical washer 8 arranged in a top-to-bottom order. This design allows the cylinder 9 to adaptively adjust its angle during Z-axis movement, maintaining stable contact with the slide plate assembly 5, thus not affecting the Z-axis movement accuracy.

[0040] In this embodiment, a sealing ring 11 is also provided between the lower inner wall of the cylinder and the piston rod.

[0041] Example 2,

[0042] In another embodiment, the adaptive balancing cylinder device of the gear grinding machine is also mounted on the base 13 and embedded in the mounting hole of the slide plate assembly 5. Unlike embodiment one, the accumulator oil supply assembly is also connected to a control system, which automatically controls the pressure oil circuit through feedback from a pressure sensor.

[0043] The remaining parts are similar to those in Embodiment 1. The piston rod is still composed of a piston rod body 10 and a piston rod end 12 connected by threads. The bottom is supported on the base 13 and connected to the accumulator oil supply assembly through an oil pipe connector 14. The guide rod 4 is threaded to the cylinder 9, passes through the slide plate assembly 5, is limited at the top by a retaining ring 2, and is sealed with an O-ring 3. The adaptive washer assembly between the end face of the cylinder 9 and the inner end face of the slide plate assembly 5 is also composed of a flat washer 6, a spherical washer 7, and a conical washer 8, ensuring the adaptive adjustment capability of the cylinder 9 during Z-axis movement.

[0044] Both embodiments demonstrate the specific structure and working principle of the adaptive balancing cylinder device of the gear grinding machine. Through optimized design and adaptive adjustment capability, it achieves beneficial effects such as saving manufacturing costs, improving motion stability, increasing machining accuracy, extending service life, and facilitating installation and maintenance.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An adaptive balancing cylinder device for a gear grinding machine, mounted on a base and embedded in the mounting hole of a slide assembly, characterized in that: It includes a cylinder, a piston rod disposed inside the cylinder, and a guide rod disposed at the top of the piston rod. The bottom of the piston rod is disposed on a base. The piston rod is connected to an accumulator oil supply assembly through an oil pipe joint for providing stable pressure oil to the balance cylinder. The piston rod consists of a piston rod body and a piston rod end connected by threads. Its lower end is supported on the base and connected to the oil pipe joint. The piston rod is not completely fixed. The guide rod is threaded to the cylinder, passes through the slide plate assembly with clearance fit, and is limited by a retaining ring at the top to prevent it from coming out. An exhaust plug is also provided at the top to discharge air from the cylinder. A gap is left between the outer circle of the cylinder and the hole of the slide plate assembly. An adaptive washer group is also provided between the end face of the cylinder and the inner end face of the slide plate assembly. The adaptive washer group consists of a flat washer, a spherical washer and a conical washer. The adaptive washer group consists of a flat washer, a spherical washer, and a conical washer in the order from top to bottom, so that the cylinder can adaptively adjust during the up and down movement of the slide assembly without affecting the motion accuracy. The guide rod, cylinder and slide plate assembly are clearance fit, which reduces the requirements for machining accuracy and assembly accuracy.

2. The adaptive balancing cylinder device for a gear grinding machine according to claim 1, characterized in that: The top of the guide rod is equipped with an O-ring seal to prevent cutting fluid and wear debris from entering.

3. The adaptive balancing cylinder device for a gear grinding machine according to claim 2, characterized in that: The vent plug and retaining ring at the top of the guide rod are integrated in the same axial position to ensure that the sealing and limiting functions do not interfere with each other.

4. The adaptive balancing cylinder device for a gear grinding machine according to claim 1, characterized in that: The segmented threaded connection structure between the piston rod end and the piston rod body facilitates disassembly and maintenance.

5. The adaptive balancing cylinder device for a gear grinding machine according to claim 1, characterized in that: The accumulator oil supply assembly includes a pressure sensor that can monitor and automatically adjust the balance pressure in real time to maintain stable thrust.

6. The adaptive balancing cylinder device for a gear grinding machine according to claim 1, characterized in that: The piston rod and the base are connected in a non-fixed floating manner.

7. The adaptive balancing cylinder device for a gear grinding machine according to claim 1, characterized in that: A sealing ring is also provided between the lower inner wall of the cylinder and the piston rod.

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