Position detection mechanism of external mounting type erector

Abstract

The invention relates to an external mounting type erector position detection mechanism which comprises a box body, an encoder, a proximity switch, a transmission shaft and a transmission gear, the transmission shaft is installed in the box body through a bearing, one end of the transmission shaft is fixedly connected with the transmission gear, the transmission gear is in meshed connection with an erector disc body gear ring, and the other end of the transmission shaft is fixedly connected with the encoder. The box body is provided with the proximity switch, the encoder and the proximity switch are connected with the PLC, and the PLC compares data of the proximity switch and the encoder, so that the real-time position of the erector is accurately calculated. According to the method, on the premise that an existing equipment structure is not changed, the movement positioning precision of the erector is remarkably improved, and meanwhile the equipment modification difficulty and the maintenance cost are greatly reduced. Especially in a long-time and high-strength tunnel construction environment, the construction efficiency can be greatly improved by applying the mechanism, accidents are reduced, and the safety and stability of the construction process are ensured.

Description

Technical Field

[0001] The invention relates to a shield segment assembling machine, and in particular to a real-time position detection system for a shield segment assembling machine. Background Art

[0002] The shield machine is a kind of engineering machinery equipment used for tunnel excavation, which is used for excavating and cutting soil, transporting soil slag, assembling tunnel lining, measuring and guiding deviation correction, etc. The segment assembly machine is a key component of shield excavation. It is mainly responsible for assembling the segments into rings to form linings, thereby supporting the excavated tunnel wall. During the tunnel construction process, the segment assembly workload is large and the operation is complicated. It is necessary to accurately control the segment assembly rotation speed, dynamic response time and motion positioning accuracy. The traditional method of relying on proximity switches to detect the gear tooth shape and calculating the assembly machine motion positioning through PLC programs cannot meet the accuracy requirements, there are cumulative errors, and regular maintenance and correction parameters are required. Such errors not only directly affect the operating accuracy of the equipment, but may also cause serious safety hazards, such as accidents such as cable breaking. The existence of cumulative errors will cause the assembly machine rotation position to exceed the limit, resulting in the cable drum cable breaking, and in extreme cases may even cause casualties to the assembly personnel. Once the cable is broken, maintenance will greatly affect the normal construction progress. Therefore, improving the detection accuracy and eliminating the cumulative error are of great significance to the entire assembly process. Summary of the invention

[0003] The purpose of the present invention is to provide a low-cost solution that does not require significant changes to the original design structure, and an external assembly machine position detection mechanism that significantly improves the movement positioning accuracy of the assembly machine during the segment assembly process.

[0004] In order to achieve the above object, the present invention adopts the following technical solution:

[0005] A position detection mechanism for an external assembling machine comprises a housing, an encoder, a proximity switch, a transmission shaft and a transmission gear. The transmission shaft is installed in the housing through a bearing, one end of the transmission shaft is fixedly connected to the transmission gear, the transmission gear is meshed with a gear ring of an assembling machine disc, the other end of the transmission shaft is fixedly connected to the encoder, the housing is equipped with a proximity switch, the encoder and the proximity switch are connected to a PLC controller, the PLC controller compares the data of the proximity switch and the encoder, thereby accurately calculating the real-time position of the assembling machine.

[0006] Furthermore, the specifications of the transmission gear are determined according to the parameters of the assembly machine disc body gear ring.

[0007] Furthermore, the flange cover is fixedly connected to the box body by screws, and the flange cover is a detachable structure, which is convenient for daily repair and maintenance.

[0008] Furthermore, a dustproof sealing ring 1 is provided between the flange cover and the transmission shaft; a dustproof sealing ring 2 is provided between the housing and the transmission shaft, which can effectively prevent dust and impurities from entering the bearing and ensure the cleanliness and stability of the system during long-term operation.

[0009] Furthermore, the transmission shaft is axially fixed with a backstop circular nut; the transmission shaft is fixedly connected with a fixed pressure plate and a fixed bolt by the backstop circular nut and the fixed pressure plate, and the backstop circular nut and the fixed pressure plate are used to control the axial displacement of the transmission gear.

[0010] Furthermore, the encoder is a rotary encoder, which is an angular displacement sensor, and is used to provide high-precision angular displacement data and transmit the generated electrical signal to the PLC controller.

[0011] Furthermore, the proximity switch is used to detect the tooth shape of the gear and transmit the generated electrical signal to the PLC controller.

[0012] Furthermore, the bearing is a spherical roller bearing, which can withstand radial loads and axial loads and effectively offset some impacts and shaking, playing a "buffering" role.

[0013] The beneficial effects of the present invention are:

[0014] The implementation of the present invention not only significantly improves the motion positioning accuracy of the assembly machine without changing the existing equipment structure, but also greatly reduces the difficulty of equipment modification and maintenance costs. Especially in long-term and high-intensity tunnel construction environments, the application of this mechanism can greatly improve construction efficiency, reduce the occurrence of accidents, and ensure the safety and stability of the construction process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an assembly principle diagram of the position detection mechanism of the external assembling machine of the present invention. DETAILED DESCRIPTION

[0016] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention.

[0017] like Figure 1 As shown, the external assembly machine position detection mechanism of the present invention includes: a box body 1, a flange cover plate 2, an encoder 4, a proximity switch 14, a transmission shaft 5, a retaining round nut 7, a dustproof sealing ring 1 6, a spherical roller bearing 9, a transmission gear 10, a dustproof sealing ring 2 11, and a fixed pressure plate 13.

[0018] The transmission shaft 5 is installed in the housing 1 through the spherical roller bearing 9 and is axially fixed with the stop nut 7. One end of the transmission shaft 5 is fixedly connected to the transmission gear 10 through the fixed pressure plate 13 and the fixed bolt 12, and the transmission gear 10 is meshed with the ring gear of the assembly machine disk. The stop nut 7 and the fixed pressure plate 13 are used to control the axial displacement of the transmission gear 10. An encoder 4 is fixedly connected to the other end of the transmission shaft 5. As an angular displacement sensor, the encoder 4 has extremely high accuracy and reliability, and can continuously and accurately obtain the real-time position data of the assembly machine in a complex construction environment. A proximity switch 14 is installed on the housing 1. The proximity switch 14 is used to detect the tooth shape of the gear and transmit the generated electrical signal to the PLC program, thereby calculating the real-time position data of the assembly machine. The encoder 4 and the proximity switch 14 are electrically connected to the PLC controller.

[0019] The spherical roller bearing 9 can not only bear radial load and axial load, but also effectively offset some impact and shaking, play a "buffer" role, thereby protecting the encoder, improving its measurement accuracy, and extending its service life.

[0020] The flange cover 2 is fixedly connected to the housing 1 by screws 3. The flange cover 2 is detachable for easy daily repair and maintenance. A dustproof seal 1 6 is provided between the flange cover 2 and the transmission shaft 5. A dustproof seal 2 11 is provided between the housing 1 and the transmission shaft 5. The dustproof seal 1 6 and the dustproof seal 2 11 effectively prevent dust and impurities from entering the bearing, ensuring the cleanliness and stability of the system during long-term operation.

[0021] Designing a suitable transmission gear according to the parameters of the ring gear not only fully considers the space utilization, but also maximizes the accuracy of data collection.

[0022] According to the designed transmission gear and encoder selection, the transmission shaft 5, the housing 1 and the flange cover 2 are designed in sequence, and the spherical roller bearing 9, the stop nut 7 and the dustproof seal 6 are selected. Finally, the module is assembled on the assembly machine plate.

[0023] The rotation of the assembly machine disk drives the inner ring of the encoder 4 to rotate, generating an electrical signal. The electrical signal is transmitted to the PLC program, converted into a digital signal, and calculated by the designed program to obtain the current position angle of the assembly machine.

[0024] The rotation of the assembly machine drives the transmission gear to rotate, and the proximity switch generates an electrical signal. The electrical signal is transmitted to the PLC program, converted into a digital signal, and calculated by the designed program to obtain the current position angle of the assembly machine.

[0025] The present invention adopts two data detection methods, photoelectric proximity switch and rotary encoder, and compares data through PLC program, so as to accurately calculate the real-time position of the assembly machine. The photoelectric proximity switch is responsible for detecting the tooth shape of the gear, while the rotary encoder provides high-precision angular displacement data. The cooperation of the two greatly improves the accuracy of position detection and effectively eliminates the cumulative error in the traditional method.

Claims

1. A position detection mechanism for an external assembly machine, characterized in that: It includes a box body, an encoder, a proximity switch, a transmission shaft, and a transmission gear. The transmission shaft is installed in the box body through a bearing. One end of the transmission shaft is fixedly connected to the transmission gear, and the transmission gear is meshed with the assembly machine disk gear ring. The other end of the transmission shaft is fixedly connected to the encoder. The box body is equipped with a proximity switch. The encoder and the proximity switch are connected to a PLC controller. The PLC controller compares the data of the proximity switch and the encoder, thereby accurately calculating the real-time position of the assembling machine.

2. The external assembling machine position detection mechanism according to claim 1, characterized in that: The specifications of the transmission gear are determined according to the parameters of the assembly machine disc ring gear.

3. The external assembling machine position detection mechanism according to claim 1, characterized in that: The flange cover is fixedly connected to the box body by screws. The flange cover is a detachable structure, which is convenient for daily repair and maintenance.

4. The external assembling machine position detection mechanism according to claim 1, characterized in that: A dustproof seal ring 1 is provided between the flange cover and the transmission shaft; a dustproof seal ring 2 is provided between the housing and the transmission shaft, which can effectively prevent dust and impurities from entering the bearing and ensure the cleanliness and stability of the system during long-term operation.

5. The position detection mechanism of the external assembling machine according to claim 1, characterized in that: The transmission shaft is axially fixed with a backstop round nut; the transmission shaft is fixed with a pressure plate and a fixing bolt to fix the transmission gear, and the backstop round nut and the fixing pressure plate are used to control the axial displacement of the transmission gear.

6. The position detection mechanism of the external assembling machine according to claim 1, characterized in that: The encoder is a rotary encoder, which is an angular displacement sensor. It is used to provide high-precision angular displacement data and transmit the generated electrical signal to the PLC controller.

7. The position detection mechanism of the external assembling machine according to claim 1, characterized in that: The proximity switch is used to detect the tooth shape of the gear and transmit the generated electrical signal to the PLC controller.

8. The position detection mechanism of the external assembling machine according to claim 1, characterized in that: The bearing is a spherical roller bearing, which can bear radial load and axial load and effectively offset some impact and shaking, playing a "buffer" role.

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