A hydraulic cylinder groove digging tool

Abstract

The application discloses a groove milling tool for hydraulic oil cylinder, which comprises a base, a first sliding table, a second sliding table, a motor, a transmission mechanism, a milling cutter, an oil cylinder rotating mechanism and a stabilizing mechanism. The first sliding table and the second sliding table are arranged perpendicularly on the base, and the motor is installed at the output end of the second sliding table. The transmission mechanism comprises a transmission shaft driven by a bevel gear pair, and the power of the motor is transmitted to the milling cutter arranged axially along the radial direction of the oil cylinder. The oil cylinder rotating mechanism clamps and drives the oil cylinder to rotate through an electric spindle and an electric chuck. The stabilizing mechanism uses a follow-up roller group driven by an electric push rod to tightly hold the oil cylinder from the top and bottom directions, thereby enhancing the rotation stability. The application realizes the accurate feeding of the oil cylinder in the axial and radial directions by driving the milling cutter through the double sliding tables, and in combination with the rotation of the oil cylinder, the milling and machining of the grooves with different positions, widths and depths on the inner and outer walls of the oil cylinder can be efficiently and precisely completed.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of hydraulic cylinder processing, in particular to a tool for digging an inner groove of a hydraulic cylinder. BACKGROUND

[0002] As a core executive component in engineering machinery and industrial equipment, the inner wall of the cylinder barrel of a hydraulic cylinder often needs to be processed with various grooves (such as annular grooves for mounting sealing elements and buffer devices). The size accuracy, shape and position accuracy and surface quality of these grooves are directly related to the sealing performance, working reliability and service life of the hydraulic cylinder.

[0003] At present, for the processing of the inner wall groove of the cylinder barrel of a hydraulic cylinder, the following two methods are traditionally adopted:

[0004] Special groove drawing equipment processing: this method uses a specially designed broach to process on a broaching machine or a special machine tool. Although the efficiency is high, there are significant disadvantages: first, a broach can usually only process grooves of a specific size and shape, and the degree of flexibility is extremely low. When the product model changes, expensive special broaches need to be redesigned and manufactured, which is costly and time-consuming. Secondly, the cutting force in the broaching process is huge, and the rigidity requirement of the workpiece (especially the thin-walled cylinder barrel) is high, which is prone to deformation, and the equipment itself is large and expensive to invest.

[0005] Boring machine or modified lathe processing: this method clamps the hydraulic cylinder on the machine tool and uses a single-point turning tool or a milling cutter driven by a drag plate to cut. In order to process the inner wall annular groove, the tool needs to be intermittently cut in the radial direction, or special accessories of the machine tool need to be used. Although this method has a certain flexibility, it has the following limitations:

[0006] The radial feed mechanism of the machine tool usually has a reverse gap, which leads to inaccurate control of the axial position and depth size of the groove, and poor consistency.

[0007] Due to the limitation of the structure of the machine tool (such as the size and stroke of the boring bar), for the inner wall groove of a deep hole cylinder with a large length-diameter ratio, the rigidity of the tool system is insufficient, which is prone to vibration and tool let phenomenon, seriously affecting the processing quality.

[0008] The processing process often needs manual intervention and adjustment several times, which is low in production efficiency and highly dependent on the skills of the operator.

[0009] When processing long and heavy cylinders, there is generally a lack of effective intermediate stable support, and the cylinder is prone to shaking and bending when rotating or under stress, which further deteriorates the processing accuracy and surface finish. SUMMARY

[0010] The purpose of the present application is to provide a hydraulic cylinder inner groove digging tool that can flexibly move the milling cutter along the axial and radial directions of the cylinder and cooperate with the rotation of the cylinder to realize precise milling of grooves of different positions, widths and depths on the inner and outer walls of the cylinder.

[0011] The present application achieves the above-mentioned purposes by the following technical solutions:

[0012] A hydraulic cylinder inner groove digging tool, comprising a base, characterized in that it further comprises a first linear drive mechanism, a second linear drive mechanism, a motor, a transmission mechanism, a milling cutter, a cylinder rotation mechanism and a stabilizing mechanism.

[0013] The first linear drive mechanism is arranged on the base, the second linear drive mechanism is arranged on the output end of the first linear drive mechanism, and the driving directions of the first linear drive mechanism and the second linear drive mechanism are perpendicular to each other.

[0014] The motor is arranged on the output end of the second linear drive mechanism.

[0015] The transmission mechanism transmits the rotary motion of the motor to the milling cutter to rotate the milling cutter around its axial direction, and the axial direction of the milling cutter is configured to extend along the radial direction of the cylinder.

[0016] The cylinder rotation mechanism is arranged on the base and is used to clamp the end of the cylinder and drive the cylinder to rotate around its axis.

[0017] The stabilizing mechanism is arranged on the base and is used to provide radial support when the cylinder rotates to enhance the stability of the cylinder rotation.

[0018] In some embodiments, the first linear drive mechanism is a first sliding table, the second linear drive mechanism is a second sliding table, and the first sliding table and the second sliding table are screw sliding tables or linear motors.

[0019] In some embodiments, the transmission mechanism comprises an elongated shaft, a first bevel gear, a second bevel gear and a transmission shaft.

[0020] The elongated shaft is connected to the output end of the motor.

[0021] The first bevel gear is arranged on the elongated shaft.

[0022] The second bevel gear is engaged with the first bevel gear and is arranged on the transmission shaft.

[0023] The transmission shaft is rotationally connected to the elongated housing, and the elongated housing is fixedly connected to the output end of the motor or the second linear drive mechanism.

[0024] One end of the transmission shaft penetrates the elongated housing and is provided with a milling cutter seat, and the milling cutter is mounted on the milling cutter seat.

[0025] In some embodiments, the cylinder rotation mechanism includes a support, an electric spindle, and an electric chuck;

[0026] The support is fixedly installed on the base;

[0027] The electric spindle is fixedly mounted on the support;

[0028] The electric chuck is located at the output end of the electric spindle and is used to clamp the end of the hydraulic cylinder.

[0029] In some embodiments, the stabilizing mechanism includes two sets of clamping assemblies, each set of clamping assemblies including an electric actuator, a roller frame, and a follower roller;

[0030] The two sets of clamping components are distributed in a vertical mirror image, with the upper clamping component fixedly mounted on the base by a stand;

[0031] The electric actuator drives the roller frame to rise and fall. Two follower rollers are rotatably connected to the roller frame. The follower rollers are configured to clamp the hydraulic cylinder and rotate with the hydraulic cylinder.

[0032] In some embodiments, the driving directions of the first linear drive mechanism and the second linear drive mechanism are both horizontal and perpendicular to each other, so that the motor can move along the axial and radial directions of the cylinder, thereby enabling the milling cutter to process grooves of different widths and depths in different parts inside or outside the cylinder.

[0033] Compared with existing technologies, this application, by setting a first slide and a second slide that are perpendicular to each other, can precisely control the axial and radial feed of the milling cutter along the hydraulic cylinder, thereby flexibly adjusting the machining position and the width and depth of the groove, resulting in a high degree of automation and good machining accuracy.

[0034] By employing bevel gear transmission, the direction of power transmission is changed, making the rotating shaft perpendicular to the milling cutter axis. This allows the milling cutter to be radially aligned with the cylinder wall for milling. The structure is compact and very suitable for operation in narrow spaces such as inside a cylinder.

[0035] The system incorporates a hydraulic cylinder rotation mechanism and a stabilizing mechanism. The hydraulic cylinder is driven to rotate by an electric spindle and is stabilized by multiple sets of follower rollers. This allows the milling cutter to be fixed in a radial position, and the rotation of the hydraulic cylinder is used to machine a complete annular groove. This simplifies the control of the milling cutter's motion trajectory and improves machining stability and roundness. Attached Figure Description

[0036] The accompanying drawings are provided to further illustrate the present application and form part of the specification. They are used together with the following detailed description to explain the present application, but do not constitute a limitation thereof. In the drawings:

[0037] Figure 1 This is a schematic diagram of the structure of this application;

[0038] Figure 2 This is a schematic diagram of the elongated shell structure of this application;

[0039] Figure 3 This is a schematic diagram of the transmission shaft structure of this application.

[0040] The annotations in the attached figures are explained as follows:

[0041] 1. First slide; 2. Second slide; 3. Motor; 4. Long housing; 5. Extended shaft; 6. First bevel gear; 7. Second bevel gear; 8. Drive shaft; 9. Milling cutter holder; 10. Milling cutter; 11. Support; 12. Electric spindle; 13. Electric chuck; 14. Electric actuator; 15. Roller frame; 16. Follower roller; 17. Stand; 18. Base. Detailed Implementation

[0042] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0043] In the description of this application, it should be understood that the terms "upper," "lower," "front," "back," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the appendix. Figure 1 This description is provided for the convenience of describing this application and for the purpose of simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0044] like Figures 1-3 As shown, a tool for grooving the inner wall of a hydraulic cylinder is provided. The core concept of this tool is to drive the milling cutter to rotate through a two-dimensionally movable drive unit, and together with the rotational motion of the cylinder itself, to complete the precision machining of the grooves on the inner and outer walls of the cylinder.

[0045] The base 18, serving as the fundamental support structure of the entire device, is typically made of robust metal to ensure overall rigidity. A first linear drive mechanism is mounted on the base 18. In some preferred embodiments, this first linear drive mechanism is specifically a first slide 1. The first slide 1 can be a common lead screw slide, driven by a servo motor to achieve linear motion; or, in embodiments requiring high precision and high speed, the first slide 1 can also be a linear motor direct-drive slide.

[0046] A second linear drive mechanism is provided on the output end (i.e., the moving part) of the first slide 1. Further, this second linear drive mechanism is specifically a second slide 2. The type of the second slide 2 is similar to that of the first slide 1, and it can also be a lead screw slide or a linear motor. The key point is that the driving direction of the first slide 1 and the driving direction of the second slide 2 intersect each other perpendicularly in the horizontal plane. Typically, the driving direction of the first slide 1 is defined as the axial direction of the hydraulic cylinder (i.e., the...). Figure 1 The driving direction of the second slide 2 is defined as the radial direction of the hydraulic cylinder (i.e., the left and right directions in the cylinder). Figure 1 (The front and back directions in the middle). Through the coordinated work of the first slide 1 and the second slide 2, the actuator at its end can be driven to perform precise two-dimensional positioning in the horizontal plane.

[0047] A motor 3 is fixedly installed on the output end of the second slide 2. This motor 3 serves as the power source for the main milling motion and is preferably a speed-regulating motor to adapt to the processing requirements of different materials.

[0048] The output shaft of the motor 3 is connected to a transmission mechanism, which transmits the rotational motion of the motor 3 to the milling cutter 10 and changes the direction of the power. In some specific embodiments, the transmission mechanism includes an extended shaft 5, a first bevel gear 6, a second bevel gear 7, and a transmission shaft 8. One end of the extended shaft 5 is directly connected to the output shaft of the motor 3 via a coupling, and the other end extends into a long strip housing 4. The long strip housing 4 serves to support and protect the internal transmission components. Furthermore, the long strip housing 4 can be fixedly connected to the housing of the motor 3, or directly connected to the output end of the second slide 2 via a connector, thereby ensuring that it can synchronously follow the motor 3 and be driven to move by the second slide 2.

[0049] At the end of the extended shaft 5, the first bevel gear 6 is fixedly mounted. A second bevel gear 7 meshes with the first bevel gear 6 and is fixedly mounted on the drive shaft 8. The drive shaft 8 is rotatably connected to the elongated housing 4 via a bearing (not shown in the figure), meaning the drive shaft 8 can rotate freely relative to the elongated housing 4. The axial direction of the drive shaft 8 is set perpendicular to the axial direction of the extended shaft 5 (i.e., the output shaft of the motor 3). One end of the drive shaft 8 extends out of the elongated housing 4, and a milling cutter holder 9 is mounted at this end. A milling cutter 10 for actual cutting is mounted on the milling cutter holder 9. Through this bevel gear transmission design, the axial rotation of the motor 3 is converted into the rotation of the milling cutter 10 about its own axis, and the axial direction of the milling cutter 10 (i.e., the axial direction of the drive shaft 8) is configured to extend radially along the cylinder, so that the cutting edge of the milling cutter 10 can face the inner or outer wall of the cylinder.

[0050] To facilitate milling operations, this invention also includes a hydraulic cylinder rotation mechanism. This mechanism comprises a support 11, an electric spindle 12, and an electric chuck 13. The support 11 is fixedly mounted on one end of a base 18. The electric spindle 12 is fixedly mounted on the support 11, and the electric chuck 13 is mounted on its output end. One end of the hydraulic cylinder to be machined is firmly clamped by the electric chuck 13. Starting the electric spindle 12 drives the electric chuck 13 and the clamped hydraulic cylinder to rotate precisely around their own axis.

[0051] Hydraulic cylinder stabilization system

[0052] For long or heavy hydraulic cylinders, relying solely on one end for clamping and rotation may not provide sufficient stability. Therefore, this invention incorporates a stabilizing mechanism. In some preferred embodiments, this stabilizing mechanism includes two sets of clamping assemblies. Each set of clamping assemblies includes an electric actuator 14, a roller frame 15, and two follower rollers 16. The two sets of clamping assemblies are arranged in a vertically mirrored manner. The upper clamping assembly is fixedly mounted on a base 18 via a support frame 17, and the lower clamping assembly is mounted on the base 18, typically located between the hydraulic cylinder rotation mechanism and the milling power head.

[0053] Furthermore, the upper electric actuator 14 is fixedly installed on the top of the upright 17, with its piston rod connected downwards to the upper roller frame 15; the lower electric actuator 14 is fixedly installed on the base 18 or the bottom of the upright 17, with its piston rod connected upwards to the lower roller frame 15. On each roller frame 15, two follower rollers 16 are rotatably connected in parallel via bearings. The four follower rollers 16 are spatially distributed vertically and horizontally, forming a channel to accommodate the hydraulic cylinder. By controlling the extension and retraction of the upper and lower electric actuators 14, the upper and lower roller frames 15 can be driven to move towards or away from each other, thereby adapting to and clamping hydraulic cylinders of different diameters. During processing, the four follower rollers 16 are in close contact with the outer wall of the hydraulic cylinder, providing radial support and rotating freely with the rotation of the hydraulic cylinder, greatly enhancing the rigidity and stability of the hydraulic cylinder during rotation, effectively suppressing vibration, and ensuring processing quality.

[0054] Work process

[0055] During operation, firstly, one end of the hydraulic cylinder to be processed is inserted into the electric chuck 13 and clamped. Then, according to the cylinder diameter, the two sets of electric push rods 14 of the stabilizing mechanism are adjusted so that the four follower rollers 16 grip the cylinder from both above and below. The motor 3 is started, driving the milling cutter 10 to rotate at high speed. By controlling the first slide 1 and the second slide 2, the milling cutter 10 is precisely moved to the axial position and radial starting depth of the groove to be machined on the inner (or outer) wall of the hydraulic cylinder. Next, the electric spindle 12 is started, driving the hydraulic cylinder to rotate at a uniform speed. Simultaneously, according to the required groove width, the first slide 1 drives the milling cutter 10 to slowly feed along the cylinder axis, thus milling a complete annular groove on the cylinder wall. By programming and controlling the movement of the two slides, multiple grooves of different depths, widths, and positions can be easily machined.

[0056] The foregoing has shown and described the basic principles, main features, and advantages of this application. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this application. Various changes and modifications can be made to this application without departing from the spirit and scope thereof, and all such changes and modifications fall within the scope of this application as claimed. The scope of protection of this application is defined by the appended claims and their equivalents.

Claims

1. A hydraulic cylinder-based trenching tool, characterized in that, Including a base (18), characterized in that: it also includes a first linear drive mechanism, a second linear drive mechanism, a motor (3), a transmission mechanism, a milling cutter (10), a hydraulic cylinder rotation mechanism, and a stabilizing mechanism; The first linear drive mechanism is mounted on the base (18), and the second linear drive mechanism is mounted on the output end of the first linear drive mechanism. The driving directions of the first linear drive mechanism and the second linear drive mechanism are perpendicular to each other. The motor (3) is mounted on the output end of the second linear drive mechanism; The transmission mechanism transmits the rotational motion of the motor (3) to the milling cutter (10), causing the milling cutter (10) to rotate about its axial direction, and the axial direction of the milling cutter (10) is configured to extend radially along the cylinder. The cylinder rotation mechanism is mounted on the base (18) and is used to clamp the end of the cylinder and drive the cylinder to rotate around its axis. The stabilizing mechanism is mounted on the base (18) to provide radial support when the cylinder rotates, thereby enhancing the rotational stability of the cylinder.

2. The trenching tool for hydraulic cylinders as described in claim 1, characterized in that: The first linear drive mechanism is a first slide (1), and the second linear drive mechanism is a second slide (2). The first slide (1) and the second slide (2) are lead screw slides or linear motors.

3. The trenching tool for hydraulic cylinders as described in claim 1 or 2, characterized in that: The transmission mechanism includes an extended shaft (5), a first bevel gear (6), a second bevel gear (7), and a transmission shaft (8). The extended shaft (5) is connected to the output end of the motor (3); The first bevel gear (6) is mounted on the extended shaft (5); The second bevel gear (7) meshes with the first bevel gear (6) and is mounted on the drive shaft (8); The drive shaft (8) is rotatably connected to the elongated housing (4), and the elongated housing (4) is fixedly connected to the output end of the motor (3) or the second linear drive mechanism; One end of the drive shaft (8) extends out of the long housing (4) and is provided with a milling cutter seat (9), and the milling cutter (10) is mounted on the milling cutter seat (9).

4. The trenching tool for hydraulic cylinders as described in claim 1 or 2, characterized in that: The cylinder rotation mechanism includes a support (11), an electric spindle (12), and an electric chuck (13). The support (11) is fixedly installed on the base (18); The electric spindle (12) is fixedly mounted on the support (11); The electric chuck (13) is located at the output end of the electric spindle (12) and is used to clamp the end of the hydraulic cylinder.

5. The trenching tool for hydraulic cylinders as described in claim 1 or 2, characterized in that: The stabilizing mechanism includes two sets of clamping components, each set of clamping components including an electric actuator (14), a roller frame (15) and a follower roller (16). The two sets of clamping components are distributed in a mirror image, with the upper clamping component fixedly mounted on the base (18) via a stand (17); The electric actuator (14) drives the roller frame (15) to rise and fall. Two follower rollers (16) are rotatably connected to the roller frame (15). The follower rollers (16) are configured to hold the oil cylinder and rotate with the oil cylinder.

6. The trenching tool for hydraulic cylinders as described in claim 1, characterized in that: The driving directions of the first linear drive mechanism and the second linear drive mechanism are both horizontal and perpendicular to each other, so that the motor (3) can move along the axial and radial directions of the cylinder, thereby enabling the milling cutter (10) to process grooves of different widths and depths in different parts inside or outside the cylinder.

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