Electric guide rod telescopic pin

Abstract

The invention provides an electric guide rod telescopic pin. The electric guide rod telescopic pin comprises a shell, a driving mechanism, a lead screw, a pin rod, a driver and an encoder. The driving mechanism comprises a frameless motor, a rotating shaft and a nut, the frameless motor is fixedly connected with the shell, the nut is matched with threads of the lead screw and is in threaded connection with the lead screw, the nut is fixedly connected with the rotating shaft, and the rotating shaft is rotationally connected with the frameless motor. The tail end of the pin rod is fixedly connected with the upper portion of the lead screw directly or through a connecting piece, and the driver is arranged on one side of the shell and electrically connected with the frameless motor through an encoder. The energy efficiency is improved through electric driving, and energy loss generated when electric energy is converted into compressed air is eliminated; and energy loss in the compressed air transmission process is reduced. The system is intelligent and visualized in state, can be suitable for more use conditions, and realizes controllable movement position and speed in the process.

Description

Technical Field

[0001] This invention belongs to the field of telescopic pin technology, and specifically relates to an electric guide rod telescopic pin. Background Technology

[0002] With the continuous improvement of industrial automation and intelligence, precise positioning and reliable locking between workstations are crucial for ensuring processing quality, assembly accuracy, and smooth workflow in assembly and logistics. Traditional positioning methods often use fixed positioning pins or manual pins, which suffer from low automation, reliance on manual operation, low efficiency, and difficulty in integrating into digital control systems. Summary of the Invention

[0003] This invention provides an electric guide rod telescopic pin, driven by a servo motor with controllable speed, and employing a self-locking trapezoidal screw, which takes into account the safety locking requirements of automated operation and has better cost performance and maintenance convenience.

[0004] According to a first aspect of the present invention, one or more embodiments of this application provide an electric guide rod telescopic pin, including a housing, a drive mechanism, a lead screw, a pin, a driver, and an encoder; the housing has a chamber for accommodating the lead screw and the pin to perform linear motion; the drive mechanism includes a frameless motor, a rotating shaft, and a nut; the frameless motor is fixedly connected to the housing; the nut is threaded to and connected to the lead screw; the nut is fixedly connected to the rotating shaft; the rotating shaft is rotatably connected to the frameless motor; the end of the pin is directly or through a connector fixedly connected to the upper part of the lead screw; the driver is disposed on one side of the housing and is electrically connected to the frameless motor through an encoder.

[0005] According to the above-described technical solution of the present invention, the following improvements can also be made: Optionally, the electric guide rod telescopic pin also includes a manual unlocking mechanism, which includes a bevel gear set and a bearing set. The bevel gear set includes two bevel gears meshing at 90 degrees. One bevel gear is fixedly connected to the bottom of the rotating shaft, and the other bevel gear is connected to a rotating rod. The rotating rod is rotatably connected to the housing through the bearing set.

[0006] Optionally, the nut is located at the upper end of the rotating shaft, and a first angular contact bearing is provided on the outside of the nut. The outside of the first angular contact bearing is fixedly connected to the front end cover of the frameless motor.

[0007] Optionally, a second angular contact bearing is fitted at the lower end of the rotating shaft, and the outer side of the second angular contact bearing is fixedly connected to the rear end cover of the frameless motor.

[0008] Optionally, the number of pins is at least one or two. When there is one pin, the bottom end of the pin is directly fixedly connected to the upper part of the lead screw; when there are two pins, the bottom end of the pin is fixedly connected to the upper part of the lead screw through a connector.

[0009] Optionally, the center of the connector is fixedly connected to the lead screw, the two ends of the connector have equidistant mounting holes, and the end of the pin has a screw hole. The mounting holes and screw holes are fixedly connected by bolts.

[0010] Optionally, a large bevel gear is fixedly connected to the bottom of the rotating shaft, and a small bevel gear is connected to the rotating rod. The number of teeth on the large bevel gear is greater than the number of teeth on the small bevel gear.

[0011] Optionally, copper sleeves are provided in multiple locations within the cavity where the feed pin moves linearly.

[0012] Optionally, a dust cover is provided at the upper end of the chamber that contacts the outside.

[0013] Optionally, the lead screw is a trapezoidal lead screw.

[0014] The beneficial effects of this invention are as follows: This invention provides an electric guide rod telescopic pin, using a frameless motor combined with a nut; a screw directly or indirectly connected to the pin and capable of passing through a hollow motor and a hollow encoder; and the frameless motor employing double bearings on both sides for positioning, achieving an overall length reduction. The bevel gear transmission allows manual drive of the motor rotor, unlocking the telescopic pin in the absence of power. It is safe to use, employing a self-locking screw for static self-locking. The pin uses double copper sleeves for positioning. Electric drive improves energy efficiency, eliminating energy loss during the conversion of electrical energy into compressed air and energy loss during compressed air transmission. Intelligent and status-visualized features enable it to be applicable to more usage conditions, achieving controllable movement position and speed during operation. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of the electric guide rod telescopic pin in the extended state of the present invention; Figure 2 This is an enlarged schematic diagram of the lower housing portion when the single pin of the electric guide rod telescopic pin of the present invention is extended; Figure 3 This is a schematic diagram of the structure of the electric guide rod telescopic pin in the retracted state of the present invention; Figure 4 This is a schematic diagram of the electric guide rod telescopic pin with the double pins extended in the present invention. Figure 5 This is a schematic diagram of the external structure of the electric guide rod telescopic pin double pin of the present invention; Figure 6 This is a schematic diagram of the electric guide rod telescopic pin double pin retracted state of the present invention; Figure 7 This is a schematic diagram of the manual unlocking mechanism of the electric guide rod of the present invention.

[0016] Explanation of reference numerals in the attached drawings: 1. Pin; 2. Dust cover; 3. Copper sleeve; 4. Housing; 5. Lead screw; 6. Connecting block; 7. Motor front cover; 8. First angular contact bearing; 9. Nut; 10. Motor housing; 11. Frameless motor; 12. Shaft; 13. Motor rear cover; 14. Second angular contact bearing; 15. Encoder; 16. Motor rear cover; 17. Driver; 18. Connector; 19. Small bevel gear; 20. Large bevel gear; 21. Deep groove ball bearing; 22. Rotating rod. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this disclosure clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0018] It should be noted that, unless otherwise defined, the technical or scientific terms used in one or more embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," and similar terms used in one or more embodiments of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0019] As shown in Figures 1-7, the present invention provides an electric guide rod telescopic pin, comprising a housing 4, a drive mechanism, a lead screw 5, a pin 1, a driver 17, and an encoder 15. The housing 4 has a chamber for the lead screw 5 and the pin 1 to perform linear motion. The drive mechanism includes a frameless motor 11, a rotating shaft 12, and a nut 9. The frameless motor 11 is fixedly connected to the housing 4. The nut 9 is threaded to and connected to the lead screw 5. The nut 9 is fixedly connected to the rotating shaft 12. The rotating shaft 12 is rotatably connected to the frameless motor 11. The end of the pin 1 is directly or through a connector 18 fixedly connected to the upper part of the lead screw 5. The driver 17 is located on one side of the housing 4 and is electrically connected to the frameless motor 11 through the encoder 15.

[0020] Understandably, in this embodiment, the frameless motor 11 provides the power source for the linear motion of the lead screw 5, replacing the traditional pneumatic power, eliminating energy loss during the conversion of electrical energy into compressed air and the transmission of compressed air, and improving energy utilization efficiency; the encoder 15 and the driver 17 work together to achieve precise control of the frameless motor 11, thereby enabling controllable movement position and process speed of the lead screw 5 and the pin 1, improving the control accuracy and repeatability of the telescopic pin; at the same time, the driver 17 can provide real-time feedback on the position of the pin 1, realizing the visualization of the equipment status, allowing the telescopic pin to be integrated into the data acquisition system of the digital factory, and improving the level of intelligence.

[0021] Specifically, the frameless motor 11 drives the rotating shaft 12 to rotate, which in turn drives the nut 9 to rotate. The nut 9 drives the lead screw 5 to move up and down, and the lead screw 5 further drives the pin 1 to move linearly. Figure 1 As can be seen, in this embodiment, the lead screw 5 can move within the rotating shaft 12 after passing through the nut 9. Therefore, the length of the rotating shaft 12 and the length of the lead screw 5 are set according to the desired effect and needs. The upper housing 4 and the lower housing 4 are connected by a connecting block 6. The connecting block 6 provides space for the pin 1 and the lead screw 5 to move together. The lower housing 4 can be a component of the housing 4 of the frameless motor 11, including the motor front cover 7, the motor housing 10, the motor rear cover 13, and the motor rear cover 16. Meanwhile, in this embodiment, the encoder 15, the rotating shaft 12, the frameless motor 11, and the nut 9 share a common central shaft.

[0022] In this embodiment, the electric guide rod telescopic pin also includes a manual unlocking mechanism. The manual unlocking mechanism includes a bevel gear set and a bearing set. The bevel gear set includes two bevel gears meshing at 90 degrees. One bevel gear is fixedly connected to the bottom of the rotating shaft 12, and the other bevel gear is connected to a rotating rod 22. The rotating rod 22 is rotatably connected to the housing 4 through the bearing set.

[0023] Understandably, in this embodiment, the rotating rod 22 drives the connected bevel gear to rotate, and the two bevel gears meshing at 90 degrees achieve 90-degree power transmission, thereby driving the rotating shaft 12 to rotate. Ultimately, in the event of an energy interruption due to a lack of power supply, the telescopic pin can be manually unlocked, overcoming the deficiency of traditional telescopic pins that cannot be operated when there is no power, and improving the flexibility and emergency handling capability of the equipment. The bearing assembly provides high rigidity support for the rotation of the rotating rod 22, ensuring the stability and smoothness of power transmission during manual unlocking and reducing mechanical wear.

[0024] Specifically, the housing 4 has a channel for adjusting the rotating rod 22. The rotating rod 22 can be adjusted directly or with the aid of external tools. The rotating rod 22 is supported by a bearing assembly. Specifically, deep groove ball bearings 21 can be used to provide support. The number of deep groove ball bearings 21 is designed according to the length of the rotating rod 22. In this embodiment, two deep groove ball bearings 21 are designed as an example.

[0025] In this embodiment, the nut 9 is located at the upper end of the rotating shaft 12, and a first angular contact bearing 8 is provided on the outside of the nut 9. The outside of the first angular contact bearing 8 is fixedly connected to the front end cover 7 of the frameless motor 11.

[0026] Understandably, in this embodiment, the first angular contact bearing 8 positions and supports the upper ends of the rotating shaft 12 and the nut 9, restricting the radial and axial movement of the rotating shaft 12, ensuring the coaxiality of the nut 9 when rotating with the rotating shaft 12, and avoiding the problem of jamming and accelerated wear of the lead screw 5 transmission due to eccentricity; at the same time, the bearing is fixed to the front end cover 7 of the motor, realizing the reliable installation of the bearing, allowing the power of the frameless motor 11 to be stably transmitted to the rotating shaft 12 and the nut 9, improving the stability and service life of the drive mechanism.

[0027] In this embodiment, a second angular contact bearing 14 is sleeved on the lower end of the rotating shaft 12, and the outer side of the second angular contact bearing 14 is fixedly connected to the rear end cover 13 of the frameless motor 11.

[0028] Understandably, in this embodiment, the second angular contact bearing 14 and the first angular contact bearing 8 cooperate to form a double-sided positioning support structure for the rotating shaft 12, which further improves the stability of the rotating shaft 12 and effectively counteracts the axial reaction force generated when the lead screw 5 moves linearly. The installation method of fixing the bearing to the rear end cover 13 of the motor allows the bearings on both sides of the frameless motor 11 to form symmetrical support, shortens the overall length of the equipment, realizes the compact design of the structure, and at the same time reduces the vibration and noise during the rotation of the rotating shaft 12, improving the smoothness of the equipment operation.

[0029] In this embodiment, the number of pins 1 is at least one or two. When there is only one pin, the bottom end of the pin 1 is directly fixedly connected to the upper part of the lead screw 5. When there are two pins 1, the bottom end of the pin 1 is fixedly connected to the upper part of the lead screw 5 through a connector 18.

[0030] Understandably, in this embodiment, the pin 1 is configured as a single or double optional structure, allowing the electric guide rod telescopic pin to adapt to different workstation positioning and locking requirements, thereby improving the versatility and applicability of the equipment; the structure in which a single pin 1 is directly connected to the lead screw 5 simplifies the transmission process, reduces the number of parts, and lowers the difficulty of assembly and maintenance; the double pin 1 is connected to the lead screw 5 through the connector 18, which can provide a more stable positioning and locking effect, meeting the requirements of high precision and high stability workstation use.

[0031] In the embodiment, the center of the connector 18 is fixedly connected to the lead screw 5, the two ends of the connector 18 have equidistant mounting holes, the end of the pin 1 has a screw hole, and the mounting holes and screw holes are fixedly connected by bolts.

[0032] Understandably, in this embodiment, the center of the connector 18 is fixed to the lead screw 5 to ensure the coaxiality of the movement of the double pins 1, avoiding asynchronous situations when the two pins 1 extend or retract, thus improving the working accuracy of the double pins 1; the equidistant mounting holes at both ends ensure the symmetrical installation position of the double pins 1, further guaranteeing the stability of positioning and locking; the bolt connection method enables the pins 1 and connector 18 to be detachably fixed, facilitating the replacement and maintenance of the pins 1, reducing the maintenance cost of the equipment, and at the same time, the bolt connection has high reliability, ensuring the connection stability of the pins 1 and connector 18 during long-term operation of the equipment.

[0033] In this embodiment, a large bevel gear 20 is fixedly connected to the bottom of the rotating shaft 12, and a small bevel gear 19 is connected to the rotating rod 22. The number of teeth of the large bevel gear 20 is greater than the number of teeth of the small bevel gear 19.

[0034] Understandably, in this embodiment, the difference in the number of teeth of the large and small bevel gears is used to achieve the power transmission effect of deceleration and torque increase. When the operator rotates the small bevel gear 19, the large bevel gear 20 and the rotating shaft 12 can be rotated with a smaller force, which reduces the operating force when manually unlocking and improves the ease of operation of the manual unlocking mechanism. The meshing transmission of the bevel gears can ensure the accuracy of power transmission, reduce power loss, and make the manual unlocking operation smoother. At the same time, the cooperation of the large and small bevel gears also makes the structural layout of the manual unlocking mechanism more reasonable and adapts to the internal space design of the housing 4.

[0035] In this embodiment, copper sleeves 3 are provided in multiple locations within the cavity where the supply pin 1 moves in a straight line.

[0036] It is understood that in this embodiment, the copper sleeve 3 in the chamber provides positioning and guidance for the linear movement of the pin 1. The material of the copper sleeve 3 has good wear resistance and self-lubricating properties, which can reduce frictional loss between the pin 1 and the chamber, reduce the noise of equipment operation, and improve the smoothness and accuracy of the pin 1 movement. The multiple copper sleeves 3 realize multi-point positioning of the pin 1, effectively preventing the pin 1 from deflecting or jamming during movement, ensuring the straightness of the pin 1 extension and retraction, and thus improving the positioning accuracy and repeatability of the telescopic pin.

[0037] In this embodiment, a dust cover 2 is provided at the upper end of the chamber that is in contact with the outside.

[0038] Understandably, in this embodiment, the dust cover 2 can effectively prevent external dust, debris, liquids and other impurities from entering the cavity, avoiding impurities from adhering to the surfaces of components such as the pin 1, lead screw 5, and copper sleeve 3, and preventing problems such as accelerated wear of components, transmission jamming, and sealing failure caused by impurities; at the same time, the dust cover 2 can protect the transmission structure inside the cavity from the corrosion of the external environment, improve the environmental adaptability of the equipment, allow the telescopic pin to operate stably in complex industrial environments such as dust and oil, extend the service life of the equipment, and reduce the maintenance frequency.

[0039] In this embodiment, the lead screw 5 is a trapezoidal lead screw 5.

[0040] Understandably, in this embodiment, the lead angle of the trapezoidal lead screw 5 is smaller than the equivalent friction angle. In the event of an energy interruption, the frictional resistance of the screw pair is sufficient to prevent the load from driving the lead screw 5 to rotate in the reverse direction, thereby achieving static self-locking of the lead screw 5. This keeps the pin 1 in its current position, preventing accidental extension or retraction of the pin 1 due to power failure, thus improving the safety of the electric guide rod telescopic pin and meeting the safety locking requirements of equipment in industrial production. At the same time, the trapezoidal lead screw 5 has a simple structure and low processing cost, which can improve the cost-effectiveness of the equipment. Moreover, it has good transmission stability and is compatible with the drive mode of the frameless motor 11, ensuring the operational reliability of the telescopic pin.

[0041] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0042] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. An electric guide rod telescopic pin, characterized in that, The device includes a housing, a drive mechanism, a lead screw, a pin, a driver, and an encoder. The housing has a chamber for the lead screw and pin to perform linear motion. The drive mechanism includes a frameless motor, a rotating shaft, and a nut. The frameless motor is fixedly connected to the housing. The nut is threaded to and connected to the lead screw. The nut is fixedly connected to the rotating shaft, which is rotatably connected to the frameless motor. The end of the pin is directly or through a connector fixedly connected to the upper part of the lead screw. The driver is located on one side of the housing and is electrically connected to the frameless motor through an encoder.

2. The electric guide rod telescopic pin according to claim 1, characterized in that, The electric guide rod telescopic pin also includes a manual unlocking mechanism, which includes a bevel gear set and a bearing set. The bevel gear set includes two bevel gears meshing at 90 degrees. One bevel gear is fixedly connected to the bottom of the rotating shaft, and the other bevel gear is connected to a rotating rod. The rotating rod is rotatably connected to the housing through the bearing set.

3. The electric guide rod telescopic pin according to claim 1, characterized in that, The nut is located at the upper end of the rotating shaft, and a first angular contact bearing is provided on the outside of the nut. The outside of the first angular contact bearing is fixedly connected to the front end cover of the frameless motor.

4. The electric guide rod telescopic pin according to claim 1, characterized in that, The lower end of the rotating shaft is fitted with a second angular contact bearing, and the outer side of the second angular contact bearing is fixedly connected to the rear end cover of the frameless motor.

5. The electric guide rod telescopic pin according to claim 1, characterized in that, The number of pins is at least one or two. When there is one pin, the bottom end of the pin is directly fixedly connected to the upper part of the lead screw. When there are two pins, the bottom end of the pin is fixedly connected to the upper part of the lead screw through a connector.

6. The electric guide rod telescopic pin according to claim 5, characterized in that, The center of the connector is fixedly connected to the lead screw. The two ends of the connector have equidistant mounting holes, and the end of the pin has a screw hole. The mounting holes and screw holes are fixedly connected by bolts.

7. The electric guide rod telescopic pin according to claim 2, characterized in that, The large bevel gear is fixedly connected to the bottom of the rotating shaft, while the small bevel gear is connected to the rotating rod. The large bevel gear has more teeth than the small bevel gear.

8. The electric guide rod telescopic pin according to claim 1, characterized in that, The chamber in which the feed pin moves in a straight line is equipped with copper sleeves at multiple locations.

9. The electric guide rod telescopic pin according to claim 8, characterized in that, The upper part of the chamber that comes into contact with the outside is equipped with a dust cover.

10. The electric guide rod telescopic pin according to claim 1, characterized in that, The lead screw is a trapezoidal lead screw.

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