Tool for assisting in drilling set screw hole in flange end face of hydraulic cylinder

Abstract

The utility model provides a tool for assisting in drilling set screw holes in the flange end face of a hydraulic cylinder. The tool comprises a support, a vertical moving mechanism, a cylinder barrel pressing plate and a flange supporting mechanism. The vertical moving mechanism is arranged on the support and used for driving the cylinder barrel pressing plate to move vertically. The cylinder barrel pressing plate comprises a pressing plate body and an upper V-shaped groove formed in the bottom face of the pressing plate body, and an opening of the upper V-shaped groove faces downwards and is used for being meshed with the cylinder barrel downwards and pressing the cylinder barrel. The flange supporting mechanism is arranged in the space below the pressing plate and comprises a bearing platform and two lower V-shaped grooves formed in the bearing platform, and openings of the lower V-shaped grooves face upwards and are used for being meshed with the flange upwards and pressing the flange in cooperation with the lower pressure of the pressing plate. The tool for assisting in drilling the set screw hole in the flange end face of the hydraulic cylinder has the advantages that the flange and the cylinder barrel are relatively stable when the set screw hole is drilled, and the machining precision is improved.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder manufacturing technology, specifically, to a tooling for drilling set screw holes on the flange end face of an auxiliary hydraulic cylinder. Background Technology

[0002] Hydraulic cylinders are widely used as an important driving component in various equipment. Some of these cylinders require an end-cap flange structure due to working environment and other reasons, as shown in Figure 5.

[0003] In the end-cap flange type hydraulic cylinder, the flange 172 is connected to the cylinder barrel 173 by threads. During operation, due to equipment vibration and other reasons, the threads between the flange 172 and the cylinder barrel 173 may come loose, causing the front end cover 171 and the rear end cover 175 to loosen, which may affect the stroke of the hydraulic cylinder or even cause damage to the hydraulic cylinder.

[0004] The commonly used solution is to install set screws 174 at the threaded end faces of flange 172 and cylinder 173 to prevent relative rotation between flange 172 and cylinder 173.

[0005] Therefore, during the manufacturing process, it is necessary to machine a set screw hole at this location.

[0006] When machining the set screw holes, the flange 172 and cylinder 173 need to be assembled in place before drilling. However, in practice, on the one hand, the flange 172 and cylinder 173 are connected by threads, and on the other hand, for the sake of the overall aesthetics of the cylinder, the end face of the flange 172 needs to be aligned with the end face of the cylinder 173 during installation. Therefore, the flange 172 and cylinder 173 are not completely tightened. This causes the flange 172 and cylinder 173 to rotate due to vibration during the drilling of the set screw holes, which can easily cause the tool drill bit and tap to break, bringing great difficulties to the machining and assembly of the end holes.

[0007] In order to solve the above problems, people have been seeking an ideal technological solution. Utility Model Content

[0008] The purpose of this invention is to address the shortcomings of existing technologies by providing a tooling for drilling set screw holes on the end face of a hydraulic cylinder flange, thereby stabilizing the flange and cylinder when drilling set screw holes and improving machining accuracy.

[0009] To achieve the above objectives, the technical solution adopted by this utility model is: a tooling for drilling set screw holes on the flange end face of an auxiliary hydraulic cylinder, including a bracket, a vertical moving mechanism, a cylinder pressure plate, and a flange support mechanism;

[0010] The vertical moving mechanism is mounted on the support and is used to drive the cylinder pressure plate to move vertically.

[0011] The cylinder pressure plate includes a pressure plate and an upper V-shaped groove on the bottom surface of the pressure plate. The opening of the upper V-shaped groove faces downward and is used to bite the cylinder downward and press the cylinder tightly.

[0012] The flange support mechanism is located in the space below the pressure plate, including a base and two lower V-shaped grooves disposed on the base. The openings of the lower V-shaped grooves face upwards, and are used to bite the flange upwards and cooperate with the downward pressure of the pressure plate to tighten the flange.

[0013] Based on the above, the spacing between the two lower V-grooves in the flange support mechanism is adjustable.

[0014] Based on the above, a horizontal track is provided at the bottom of the bracket, and the flange support mechanism travels horizontally on the horizontal track to enter or move away from the space below the cylinder pressure plate.

[0015] Based on the above, the vertical moving mechanism includes a stepper motor, a coupling, a lead screw nut, a transmission lead screw, and a vertically arranged guide rod. The top end of the transmission lead screw is connected to the coupling, and the bottom end is rotatably engaged with the bottom end of the bracket. The lead screw nut is fixed to the pressure plate, and the pressure plate is slidably engaged with the guide rod. The stepper motor drives the transmission lead screw to rotate through the coupling, thereby driving the lead screw nut to move the pressure plate vertically along the guide rod.

[0016] Based on the above, the flange support mechanism has two support trolleys that run independently on the horizontal track, and each support trolley is provided with a lower V-shaped groove.

[0017] Based on the above, a support baffle is provided at the outer end of the support trolley.

[0018] Based on the above, a rubber pad is provided inside the lower V-shaped groove.

[0019] Based on the above, a rubber pad is provided inside the upper V-shaped groove.

[0020] Based on the above, the stepper motor is controlled by a controller assembly, which includes a handwheel, a handwheel coupling, an encoder, and a controller. The handwheel drives the encoder to rotate through the handwheel coupling. The encoder is connected to the controller to send pulse signals. The controller is connected to the stepper motor and drives the stepper motor to rotate according to the received pulse signals.

[0021] Based on the above, the controller assembly is mounted on one side of the bracket.

[0022] This utility model has substantial features and progress compared to the prior art. Specifically, this utility model has the following advantages:

[0023] This solution utilizes two V-grooves, one above the other, to lock the flange and cylinder relative to each other, preventing them from rotating. Then, other tools are used to drill holes in the area where set screws need to be machined. During the drilling process, the relative rotation of the flange and cylinder caused by vibration can be effectively avoided, thus ensuring drilling accuracy and stability. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the tooling for drilling set screw holes on the flange end face of the auxiliary hydraulic cylinder in this utility model.

[0025] Figure 2 This is a three-dimensional structural schematic diagram of the tooling for drilling set screw holes on the flange end face of the auxiliary hydraulic cylinder in this utility model.

[0026] Figure 3 This is a circuit diagram of the tooling for drilling set screw holes on the flange end face of the auxiliary hydraulic cylinder in this utility model.

[0027] Figure 4 This is a flowchart illustrating the operation of the tooling for drilling set screw holes on the flange end face of the auxiliary hydraulic cylinder in this utility model.

[0028] Figure 5 This is a schematic diagram of the hydraulic cylinder structure in the background art.

[0029] In the diagram: 1. Bracket; 2. Pressure plate; 3. Upper V-groove; 4. Lower V-groove; 5. Horizontal rail; 6. Support trolley; 7. Stepper motor; 8. Coupling; 9. Lead screw nut; 10. Transmission lead screw; 11. Guide rod; 12. Support baffle; 13. Handwheel; 14. Handwheel coupling; 15. Encoder; 16. Controller; 21. Cylinder; 22. Flange. Detailed Implementation

[0030] The technical solution of this utility model will be further described in detail below through specific embodiments.

[0031] like Figures 1-4 As shown, a tooling for drilling set screw holes on the flange end face of an auxiliary hydraulic cylinder includes a bracket 1, a vertical moving mechanism, a cylinder pressure plate, and a flange support mechanism.

[0032] The vertical moving mechanism is mounted on the bracket 1. The vertical moving mechanism is used to drive the cylinder pressure plate to make vertical movements. In this embodiment, the vertical moving mechanism can be simply described as an electric lead screw mechanism, which is a linear motion mechanism with good stability.

[0033] The cylinder pressure plate includes a pressure plate 2 and an upper V-shaped groove 3 disposed on the bottom surface of the pressure plate 2. The opening of the upper V-shaped groove 3 faces downward and is used to bite down on the cylinder 21 and press the cylinder 21.

[0034] The flange support mechanism is located in the space below the pressure plate 2, including a support platform and two lower V-shaped grooves 4 disposed on the support platform. The openings of the lower V-shaped grooves 4 face upward, and are used to bite the flange 22 upward and cooperate with the downward pressure of the pressure plate 2 to press the flange 22 tightly.

[0035] By utilizing the interlocking pressure of the two V-grooves 4 (one above the other), the cylinder 21 is locked relative to the flange 22, preventing the cylinder 21 from rotating relative to the flange 22. This ensures that both are stable in both the rotational and horizontal directions. Then, a drilling tool can be used to drill holes for set screws at the junction of the cylinder 21 and the flange 22. Vibration during the drilling process will not cause the cylinder 21 and the flange 22 to rotate easily, thus ensuring the stability and accuracy of the drilling process.

[0036] In a preferred embodiment, to enable the tooling to be adapted to cylinders of different lengths, the spacing between the two lower V-grooves 4 in the flange support mechanism is adjustable.

[0037] Specifically, in terms of implementation, a horizontal rail 5 is provided at the bottom of the bracket 1, and the support platform of the flange support mechanism consists of two support trolleys 6 that run independently on the horizontal rail 5. Each support trolley 6 is provided with a lower V-shaped groove 4. The relative positions of the two support trolleys 6 can be adjusted to adjust the relative distance between the two lower V-shaped grooves 4. The positions of the two support trolleys 6 can be adjusted uniformly to enter or move away from the space below the cylinder pressure plate.

[0038] In a preferred embodiment, one implementation of the vertical moving mechanism includes a stepper motor 7, a coupling 8, a lead screw nut 9, a transmission lead screw 10, and a vertically arranged guide rod 11. The top end of the transmission lead screw 10 is connected to the coupling 8, and the bottom end is rotatably engaged with the bottom end of the bracket 1. The lead screw nut 9 is fixed to the pressure plate 2, and the pressure plate 2 is slidably engaged with the guide rod 11. The stepper motor 7 drives the transmission lead screw 10 to rotate through the coupling 8, thereby driving the lead screw nut 9 to move the pressure plate 2 vertically along the guide rod 11.

[0039] In a preferred embodiment, a support baffle 12 is provided at the outer end of the support trolley 6, which is mainly used to limit the outer boundary of the flange and prevent the cylinder and flange assembly from detaching from the support trolley 6.

[0040] In a preferred embodiment, to ensure locking stability, a rubber pad 13 is provided in the lower V-groove, and correspondingly, a rubber pad is provided in the upper V-groove.

[0041] To facilitate the control of the stepper motor 7, the stepper motor 7 is controlled by a controller assembly, which includes a handwheel 13, a handwheel coupling 14, an encoder 15, and a controller 16. The handwheel 13 drives the encoder 15 to rotate through the handwheel coupling 14. The encoder 15 is connected to the controller 16 to send pulse signals. The controller 16 is connected to the stepper motor 7 and drives the stepper motor 7 to rotate according to the received pulse signals. The controller assembly is installed on one side of the bracket 1.

[0042] In this embodiment, the controller is a Mitsubishi FX3U series PLC, and the circuit schematic of the control component is shown in the figure.

[0043] In one embodiment, the ratio of the number of pulses from encoder 15 to the number of pulses input to the Mitsubishi FX3U series PLC can be adjusted in the control program, thereby changing the ratio of the number of rotations of handwheel 13 to the number of rotations of the lead screw nut. Different ratios can be set. When the pressure plate is far from the cylinder assembly, a small ratio is selected, and the lead screw rotates multiple times for one rotation of the handwheel, for coarse adjustment. When the pressure plate is close to the cylinder assembly, a large ratio is selected, and the lead screw rotates one rotation for multiple rotations of the handwheel, for fine adjustment.

[0044] The entire process of using the device is as follows:

[0045] 1. First, install the cylinder of the cylinder assembly with the flanges at both ends. Then, adjust the position of the support trolley 6 to the outside of the space below the pressure plate, and adjust the two support positions of the support trolley 6 to be consistent with the positions of the two flanges of the cylinder. Place the cylinder on the support trolley, with the two flanges at the V-groove of the support trolley.

[0046] 2. Push the support trolley along the horizontal track to the appropriate position under the pressure plate;

[0047] 3. Turn the handwheel to adjust the position of the pressure plate so that the V-groove of the pressure plate presses against the outer wall of the cylinder. At this time, there will be no relative rotation between the cylinder and the flange.

[0048] 4. Use tools such as a hand drill to drill set screw holes and tap threads on the flange end face;

[0049] 5. After drilling and other operations are completed, turn the handwheel to move the pressure plate away and push the support cart to the outside of the vertical track of the pressure plate.

[0050] By pressing the cylinder and flange together with the pressure plate and support vehicle, relative rotation between them is prevented, effectively avoiding breakage of the drill bit or tap and other problems.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A tooling for drilling set screw holes on the flange end face of an auxiliary hydraulic cylinder, characterized in that: Includes a bracket, a vertical moving mechanism, a cylinder pressure plate, and a flange support mechanism; The vertical moving mechanism is mounted on the support and is used to drive the cylinder pressure plate to move vertically. The cylinder pressure plate includes a pressure plate and an upper V-shaped groove on the bottom surface of the pressure plate. The opening of the upper V-shaped groove faces downward and is used to bite the cylinder downward and press the cylinder tightly. The flange support mechanism is located in the space below the pressure plate, including a base and two lower V-shaped grooves disposed on the base. The openings of the lower V-shaped grooves face upwards, and are used to bite the flange upwards and cooperate with the downward pressure of the pressure plate to tighten the flange.

2. The tooling for drilling set screw holes on the flange end face of the auxiliary hydraulic cylinder according to claim 1, characterized in that: The spacing between the two lower V-grooves in the flange support mechanism is adjustable.

3. The tooling for drilling set screw holes on the flange end face of the auxiliary hydraulic cylinder according to claim 2, characterized in that: The bottom of the bracket is provided with a horizontal track, and the flange support mechanism moves horizontally on the horizontal track to enter or move away from the space below the cylinder pressure plate.

4. The tooling for drilling set screw holes on the flange end face of the auxiliary hydraulic cylinder according to claim 3, characterized in that: The vertical moving mechanism includes a stepper motor, a coupling, a lead screw nut, a transmission lead screw, and a vertically arranged guide rod. The top end of the transmission lead screw is connected to the coupling, and the bottom end is rotatably engaged with the bottom end of the bracket. The lead screw nut is fixed to the pressure plate, and the pressure plate is slidably engaged with the guide rod. The stepper motor drives the transmission lead screw to rotate through the coupling, thereby driving the lead screw nut to move the pressure plate vertically along the guide rod.

5. The tooling for drilling set screw holes on the flange end face of the auxiliary hydraulic cylinder according to claim 4, characterized in that: The flange support mechanism has a platform consisting of two support trolleys that run independently on the horizontal track, and each support trolley is provided with a lower V-shaped groove.

6. The tooling for drilling set screw holes on the flange end face of the auxiliary hydraulic cylinder according to claim 5, characterized in that: A support baffle is provided at the outer end of the support trolley.

7. The tooling for drilling set screw holes on the flange end face of the auxiliary hydraulic cylinder according to claim 6, characterized in that: A rubber pad is installed inside the lower V-shaped groove.

8. The tooling for drilling set screw holes on the flange end face of the auxiliary hydraulic cylinder according to claim 7, characterized in that: A rubber pad is installed inside the upper V-shaped groove.

9. The tooling for drilling set screw holes on the flange end face of the auxiliary hydraulic cylinder according to any one of claims 4-8, characterized in that: The stepper motor is controlled by a controller assembly, which includes a handwheel, a handwheel coupling, an encoder, and a controller. The handwheel drives the encoder to rotate through the handwheel coupling. The encoder is connected to the controller to send pulse signals. The controller is connected to the stepper motor and drives the stepper motor to rotate according to the received pulse signals.

10. The tooling for drilling set screw holes on the flange end face of the auxiliary hydraulic cylinder according to claim 9, characterized in that: The controller assembly is mounted on one side of the bracket.

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