An expandable drive end with detectable piston position

Abstract

The utility model discloses an expand tightly drive end of detectable piston position, including end seat, the end surface fixed mounting of end seat has the shell body, the upper surface of shell body is seted up with recess, recess fixed mounting has the magnetic ring position sensor in, the inside of shell body is provided with piston cavity, and the sealed sliding connection of piston cavity has the inner piston, and the outside of inner piston is equipped with the magnetic ring, and one end fixed mounting of inner piston has the inner pull rod, and the tail end fixed mounting of inner piston has the spring, and the tail end of spring and piston cavity tail end inner wall fixed connection, the utility model discloses the specific position of magnetic ring can be inducted through the magnetic ring position sensor set up, can judge the specific position of inner piston through understanding the specific position of magnetic ring, can judge the specific expansion tight degree of expansion tight axle through understanding the specific position of inner piston, has better expansion tight detection use characteristic, has the actual use characteristic of expansion tight effect dynamic detection when actual use, and the practicality is stronger.

Description

Technical Field

[0001] This utility model relates to the field of expansion actuator technology, specifically to an expansion actuator end capable of detecting piston position. Background Technology

[0002] A tensioning shaft is a type of shaft device that achieves rapid clamping through air inflation or mechanical means. It is mainly used in printing, coating, and slitting machinery to fix or release roll materials. Its core function is to achieve rapid loading and unloading of roll materials by inflating or deflating the shaft or manually adjusting the keyed strips or protrusions on the shaft surface.

[0003] The expansion shaft is equipped with an expansion drive end, i.e., a piston drive end. Existing technology CN202420184824.8 includes an expansion sealing device, which includes a base plate, a housing, a pressure plate, a drive assembly, and an expansion connection assembly. The base plate and pressure plate are respectively fixed to both ends of the housing. An air inlet communicating with the inner cavity is opened on the outer wall in the middle of the housing, and a detection port communicating with the inner cavity of the housing is opened on the pressure plate. The prior art drives the expansion valve core to move, compressing the expansion sealing gasket; the inner ring of the expansion sealing gasket shrinks due to deformation, gripping the tested product, so that the expansion sealing gasket can complete the sealing of the tested product without being subjected to additional positive pressure perpendicular to the sealing surface.

[0004] Based on a review of existing technologies and practical experience, it was found that the position of the piston in the expansion drive structure determines the magnitude of the expansion force. However, traditional expansion drive ends cannot detect the piston position during use, so it is impossible to judge the specific effect of expansion based on the piston position, and it is impossible to understand the degree of expansion in a timely manner, which has certain limitations. Therefore, this utility model proposes an expansion drive end that can detect the piston position. Utility Model Content

[0005] The purpose of this invention is to provide a compression drive end that can detect the piston position, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a pressure drive end capable of detecting piston position, comprising an end seat, an outer shell fixedly mounted on the outer surface of one end of the end seat, a groove formed on the upper surface of the outer shell, a magnetic ring position sensor fixedly mounted in the groove, a piston chamber provided inside the outer shell, an inner piston slidably connected and sealed inside the piston chamber, a magnetic ring sleeved on the outside of the inner piston, an inner pull rod fixedly mounted on one end of the inner piston, and a spring fixedly mounted on the tail end of the inner piston, the tail end of the spring being fixedly connected to the inner wall of the tail end of the piston chamber.

[0007] Preferably, an external connector is fixedly installed on the outer surface of the end of the end seat away from the outer casing.

[0008] Preferably, the outer connector is provided with a pull rod cavity, which is in communication with the piston cavity.

[0009] Preferably, the outer surface of the end seat is provided with a vent, and a vent connector is fixedly installed on the vent.

[0010] Preferably, a mounting bracket is fixedly installed on the outer surface sidewall of the end seat.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This invention features a magnetic ring position sensor on the outside of the outer casing and a magnetic ring on the outside of the inner piston. During the movement of the inner piston and the magnetic ring, the magnetic ring position sensor detects the specific position of the magnetic ring. Knowing the position of the magnetic ring allows for the determination of the specific position of the inner piston, which in turn allows for the determination of the specific tightness of the tensioning shaft. This design offers superior tightness detection capabilities and, in practical use, provides dynamic detection of the tightness effect, enhancing its practicality and enabling timely understanding of the tensioning shaft's working status, thus reducing safety hazards. Attached Figure Description

[0013] Figure 1 This is a right-side external three-dimensional structural diagram of the expansion drive end according to an embodiment of the present invention;

[0014] Figure 2 This is a left-side external three-dimensional structural diagram of the expansion drive end according to an embodiment of the present invention;

[0015] Figure 3 This is a schematic diagram of the internal cross-sectional structure of the expansion drive end according to an embodiment of the present invention.

[0016] In the diagram: 1. End seat; 2. Outer shell; 3. Magnetic ring position sensor; 4. Piston chamber; 5. Inner piston; 6. Magnetic ring; 7. Inner tie rod; 8. Outer connector; 9. Tie rod chamber; 10. Vent; 11. Mounting bracket. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model 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, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" 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; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] Please see Figure 1-3 An embodiment of this utility model provides a tightening drive end capable of detecting piston position, comprising an end seat 1, an outer shell 2 fixedly mounted on the outer surface of one end of the end seat 1, a groove formed on the upper surface of the outer shell 2, a magnetic ring position sensor 3 fixedly mounted in the groove, a piston cavity 4 provided inside the outer shell 2, an inner piston 5 sealed and slidably connected inside the piston cavity 4, a magnetic ring 6 sleeved on the outside of the inner piston 5, an inner pull rod 7 fixedly mounted on one end of the inner piston 5, and a spring fixedly mounted on the tail end of the inner piston 5, the tail end of the spring being fixedly connected to the inner wall of the tail end of the piston cavity 4.

[0021] Based on the above structure, the inner pull rod 7 of the expansion drive end of this utility model can be connected to the core rod of the outer expansion shaft, as shown in the specification 3. When the inner piston 5 moves from left to right under the action of pneumatics, it can synchronously drive the inner pull rod 7 to move. In this way, the moving inner pull rod 7 can drive the core rod of the outer expansion shaft to move. The movement of the outer core rod can perform expansion treatment, ensuring the normal expansion drive effect of the expansion drive end of this utility model.

[0022] During the movement of the inner piston 5 from left to right, the inner piston 5 can compress the spring at its tail end, so that the spring is in a compressed state. After the external high-pressure gas disappears, the compressed spring can elastically reset. In this way, the elastic reset of the spring can drive the inner piston 5 to move from right to left to reset, thus completing the piston reset work of the expansion drive end of this utility model.

[0023] This utility model has a magnetic ring position sensor 3 installed on the outside of the outer shell 2. The magnetic ring position sensor 3 is a mature existing technology product. Its working principle is to convert the change of magnetic field strength into an electrical signal. When the measured object, such as a magnet, moves, the sensor detects the change in magnetic field distribution and thus calculates the position of the object. The signal of the magnetic ring position sensor 3 in this utility model is D-M9P.

[0024] This invention features a magnetic ring 6 installed outside the inner piston 5. During the movement of the inner piston 5 and the magnetic ring 6, the position sensor 3 of the magnetic ring 6 can sense the specific position of the magnetic ring 6. By knowing the specific position of the magnetic ring 6, the specific position of the inner piston 5 can be determined, and the specific tightness of the tensioning shaft can be determined. This invention has good tension detection characteristics and, in actual use, has the practical characteristic of dynamic detection of tension effect, making it more practical. It can promptly understand the specific working status of the tensioning shaft and reduce safety hazards.

[0025] In this embodiment, in order to facilitate the connection of an external expansion shaft, an external connector 8 is fixedly installed on the outer surface of the end of the end seat 1 away from the outer shell 2. The external connector 8 is provided with a pull rod cavity 9, which is interconnected with the piston cavity 4. Thus, the inner pull rod 7 can be inserted into the pull rod cavity 9 of the external connector 8 to ensure normal pull rod connection and use.

[0026] In this embodiment, an air vent 10 is provided on the outer surface of the end seat 1, and an air connector is fixedly installed on the air vent 10. High-pressure air can be injected through the air vent 10 in conjunction with the air connector.

[0027] In this embodiment, in order to assemble the expansion drive end of the present invention, a mounting bracket 11 is fixedly installed on the outer surface sidewall of the end seat 1.

[0028] Working principle: When the expansion drive end of this utility model is in use, its internal inner rod 7 can be connected to the core rod of the external expansion shaft. The air vent 10 can be used with the air connector to inject high-pressure air. As shown in the instruction manual 3, after the high-pressure air is introduced, it can drive the inner piston 5 to move from left to right. When the inner piston 5 moves from left to right under the action of pneumatics, it can synchronously drive the inner rod 7 to move. In this way, the moving inner rod 7 can drive the core rod of the external expansion shaft to move. The movement of the external core rod can perform expansion treatment, ensuring the normal expansion drive effect of the expansion drive end of this utility model.

[0029] During the movement of the inner piston 5 from left to right, the inner piston 5 can compress the spring at its tail end, so that the spring is in a compressed state. After the external high-pressure gas disappears, the compressed spring can elastically reset. In this way, the elastic reset of the spring can drive the inner piston 5 to move from right to left to reset, thus completing the piston reset work of the expansion drive end of this utility model.

[0030] This invention features a magnetic ring position sensor 3 installed on the outside of the outer shell 2 and a magnetic ring 6 installed on the outside of the inner piston 5. During the movement of the inner piston 5 and the magnetic ring 6, the magnetic ring position sensor 3 can detect the specific position of the magnetic ring 6. Knowing the specific position of the magnetic ring 6 allows for the determination of the specific position of the inner piston 5, which in turn allows for the determination of the specific tightness of the tensioning shaft. This invention has excellent tightness detection characteristics and, in practical use, provides dynamic detection of the tightness effect, making it more practical. It allows for timely understanding of the specific working status of the tensioning shaft, reducing safety hazards.

[0031] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A pressure drive end capable of detecting piston position, comprising an end seat (1), characterized in that, An outer shell (2) is fixedly installed on the outer surface of one end of the end seat (1). A groove is provided on the upper surface of the outer shell (2). A magnetic ring position sensor (3) is fixedly installed in the groove. A piston chamber (4) is provided inside the outer shell (2). An inner piston (5) is slidably connected in the piston chamber (4). A magnetic ring (6) is sleeved on the outside of the inner piston (5). An inner pull rod (7) is fixedly installed at one end of the inner piston (5). A spring is fixedly installed at the tail end of the inner piston (5). The tail end of the spring is fixedly connected to the inner wall of the tail end of the piston chamber (4).

2. The expansion drive end capable of detecting piston position according to claim 1, characterized in that: An external connector (8) is fixedly installed on the outer surface of the end of the end seat (1) away from the outer shell (2).

3. The expansion drive end capable of detecting piston position according to claim 1, characterized in that: The outer connector (8) is provided with a tie rod cavity (9), which is in communication with the piston cavity (4).

4. The expansion drive end capable of detecting piston position according to claim 1, characterized in that: The outer surface of the end seat (1) is provided with a vent (10), and a vent connector is fixedly installed on the vent (10).

5. A pressure drive end capable of detecting piston position according to claim 1, characterized in that: An installation bracket (11) is fixedly installed on the outer surface sidewall of the end seat (1).

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