Pressurizing oil cylinder for blind rivet

Abstract

A pressurizing oil cylinder for a blind rivet is characterized by comprising a pressurizing oil cylinder fixing base and a disc spring cylinder body, a connecting base is installed on a main shaft arranged in the center of the pressurizing oil cylinder fixing base and connected with the disc spring cylinder body, a plurality of sets of disc springs are arranged in the disc spring cylinder body, a disc spring piston arranged in the disc spring cylinder body is connected with a pull rod, and the pull rod is connected with the connecting base. The disc spring cylinder body is connected with an oil cylinder, the oil cylinder is arranged on a hydraulic cylinder, a hydraulic piston of the hydraulic cylinder is connected with the oil cylinder, a set screw is arranged at an oil injection hole of the oil cylinder, the hydraulic cylinder is in threaded connection with a rotary joint, a structure that an external disc spring provides tensioning force is adopted, the rotary joint is matched to be connected with a hydraulic station, and high-speed rotation of the main shaft is not affected; when the disc spring loses efficacy in use, the disc spring can be replaced without disassembling the main shaft, and replacement and maintenance are convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of rivet pulling equipment, in particular to a pressurized oil cylinder used for rivet pulling. Background Art

[0002] The replacement of tools on CNC milling machines requires a tool unclamping and clamping mechanism to loosen and clamp the tool, as well as to lock the tool during cutting to prevent it from loosening. Generally, the tool unclamping and clamping mechanism uses pneumatic or hydraulic control to clamp the tool. Different machine tools have different structures of automatic tool clamping mechanisms, and the corresponding tool holders and pull nail specifications are also different.

[0003] During normal cutting, to ensure the precise positioning of the tool holder's tapered surface and the spindle's tapered hole and prevent the tool from loosening, the tool holder, through the associated pull pin, pull claw, and pull rod, fits tightly against the spindle's tapered hole under the elastic force generated by the compressed disc spring assembly, thereby achieving precise positioning of the tool holder. When the tool needs to be replaced during machining, the tool-breaking cylinder at the upper end of the pull rod applies working pressure to the pull rod (overcoming the elastic force of the disc spring assembly) to force the pull rod and pull claw downward, allowing the pull pin to move radially outward, allowing the pull pin head to smoothly pass through the spindle hole, and then the tool holder can be removed from the spindle by a robot or manually to achieve tool change. The tension of the tool holder and the selection of the tool-breaking cylinder throughout the process are closely related to the disc spring.

[0004] The commonly used spindle structure now has a built-in disc spring. This structure has large spindle diameter requirements, so the diameter of the external tool cylinder is generally also large; hydraulic broaching and hydraulic tool feeding cannot provide sufficient force when the spindle diameter is small.

[0005] Therefore, in order to solve the above problem, a booster cylinder is designed for the commonly used CAT40 pull nails. Utility Model Content

[0006] In response to the above technical problems, the utility model provides a booster oil cylinder for pulling rivets, which adopts an external disc spring to provide tensioning force and is connected to the hydraulic station with a rotary joint without affecting the high-speed rotation of the main shaft.

[0007] To achieve the above purpose, the technical solution of the utility model is as follows:

[0008] A booster oil cylinder for pulling nails, characterized in that it includes a booster oil cylinder fixed base and a disc spring cylinder body, a connecting seat is installed on the main shaft arranged at the center of the booster oil cylinder fixed base, the connecting seat is connected to the disc spring cylinder body, multiple groups of disc springs are arranged in the disc spring cylinder body, the disc spring piston arranged in the disc spring cylinder body is connected to the pull rod, the disc spring cylinder body is connected to the oil cylinder, the oil cylinder is arranged on the hydraulic cylinder, the hydraulic piston of the hydraulic cylinder is connected to the oil cylinder, a set screw is arranged at the oil filling hole of the oil cylinder, and a rotary joint is threadedly connected to the hydraulic cylinder.

[0009] An adjusting gasket is provided in the disc spring cylinder at the location where the disc spring is installed.

[0010] Specifically, an inlet hole is provided on the disc spring piston.

[0011] Specifically, star rings are provided at the connections between the hydraulic piston, the oil cylinder and the hydraulic cylinder.

[0012] Specifically, a star ring is provided at the connection between the oil cylinder and the disc spring cylinder body.

[0013] Specifically, a star ring is provided between the disc spring cylinder and the disc spring piston.

[0014] Specifically, an O-ring is provided on the set screw.

[0015] Specifically, the rotary joint is connected to an external hydraulic station through a hydraulic pipe.

[0016] Beneficial effects of the utility model:

[0017] The utility model provides pressure through the hydraulic station so that the hydraulic piston moves to a point in the oil cylinder. Due to the direct pressure change, the hydraulic oil in the oil cylinder enters the disc spring cylinder through the oil inlet hole on the disc spring piston, thereby overcoming the pressure of the disc spring group and pushing the pull rod to move along the axial direction of the main shaft. This structure adopts an external disc spring to provide tensioning force, and is connected to the hydraulic station with a rotary joint, which does not affect the high-speed rotation of the main shaft.

[0018] If the disc spring is found to be invalid during use, the disc spring can be replaced without disassembling the main shaft, which makes replacement and maintenance convenient.

[0019] The overall structure of the utility model is relatively small in size, and can provide sufficient pulling force when used in a relatively small space. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall cross-sectional structure of a booster oil cylinder for pulling nails in the utility model;

[0021] As shown in the figure: 1. Disc spring cylinder body, 2. Adjusting gasket, 3. Disc spring, 4. Disc spring piston, 41. Oil inlet hole, 5. Oil cylinder, 6. Hydraulic cylinder, 7. Hydraulic piston, 8. Rotary joint, 9. Star ring, 10. O-ring, 11. Connecting seat, 12. Set screw, 13. Booster cylinder fixing seat, 14. Spindle, 15. Pull rod. DETAILED DESCRIPTION

[0022] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0023] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, 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 it can be indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0025] Example 1

[0026] As shown in the figure, the booster oil cylinder fixed base 13 and the disc spring cylinder body 1, the main shaft 14 set in the center of the booster oil cylinder fixed base 13 is installed with a connecting seat 11, the connecting seat 11 is connected to the disc spring cylinder body 1, multiple groups of disc springs 3 are set in the disc spring cylinder body 1, and an adjusting gasket 2 is set in the disc spring cylinder body 1 at the position where the disc spring 3 is installed.

[0027] A disc spring piston 4 is provided in the disc spring cylinder body 1, and a star ring 9 is provided between the disc spring piston 4 and the disc spring piston 4. The disc spring piston 4 is connected to the pull rod 15, and an inlet hole 41 is provided on the disc spring piston 4. The disc spring cylinder body 1 is connected to the oil cylinder 5, and a star ring 9 is provided at the connection between the oil cylinder 5 and the disc spring cylinder body 1. The oil cylinder 5 and the hydraulic cylinder 6 are fixedly connected by screws. The hydraulic piston 7 of the hydraulic cylinder 6 is connected to the oil cylinder 5. The connection between the hydraulic piston 7 and the oil cylinder 5 and the hydraulic cylinder 6 is provided with a star ring 9. A set screw 12 is provided at the oil filling hole of the oil cylinder 5, and an O-ring 10 is provided on the set screw 12. The rotary joint 8 is threadedly connected to the hydraulic cylinder 6.

[0028] Specifically, the rotary joint 8 is connected to an external hydraulic station through a hydraulic pipe.

[0029] Example 2

[0030] The oil cylinder 5 is connected to the disc spring cylinder body 1, and the hydraulic piston 7 and the hydraulic cylinder 6 are connected to the oil cylinder 5. Before installing the set screw 12, use an oiler to inject oil into the oil cylinder 5. After injecting oil, tighten the set screw 12. The rotary joint 8 is connected to the hydraulic cylinder 6, and the rotary joint 8 is connected to the hydraulic station through a hydraulic pipe;

[0031] When feeding the knife, the hydraulic station provides pressure to move the hydraulic piston 7 into the oil cylinder 5. Due to the change in diameter, the pressure changes, and the hydraulic oil in the oil cylinder 5 enters the disc spring cylinder body 1 through the oil hole of the disc spring piston 4. After overcoming the pressure of the disc spring group, it pushes the pull rod 15 to move axially along the main shaft 14 to realize the knife feeding action.

[0032] The above shows and describes the basic principles, main features and advantages of the present invention. The various components mentioned in the present invention are common technologies in the existing field. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in this utility model is defined by the appended claims and their equivalents.

Claims

1. A booster oil cylinder for pulling nails, characterized in that It includes a booster oil cylinder fixed base and a disc spring cylinder body. A connecting seat is installed on the main shaft set in the center of the booster oil cylinder fixed base. The connecting seat is connected to the disc spring cylinder body. Multiple groups of disc springs are set in the disc spring cylinder body. The disc spring piston set in the disc spring cylinder body is connected to the pull rod. The disc spring cylinder body is connected to the oil cylinder. The oil cylinder is set on the hydraulic cylinder. The hydraulic piston of the hydraulic cylinder is connected to the oil cylinder. A set screw is set at the oil filling hole of the oil cylinder. The rotary joint is threaded on the hydraulic cylinder.

2. A booster oil cylinder for pulling nails according to claim 1, characterized in that An adjusting gasket is provided in the disc spring cylinder at the location where the disc spring is installed.

3. A booster oil cylinder for pulling nails according to claim 1, characterized in that The connection between the hydraulic piston and the oil cylinder and the hydraulic cylinder is provided with a star ring.

4. A booster oil cylinder for pulling nails according to claim 1, characterized in that A star ring is provided at the connection between the oil cylinder and the disc spring cylinder body.

5. The booster oil cylinder for pulling nails according to claim 1, characterized in that A star ring is provided between the disc spring cylinder and the disc spring piston.

6. The booster oil cylinder for pulling nails according to claim 1, characterized in that An O-ring is provided on the set screw.

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