Rotating stand meshing anti-collision structure of vacuum coating machine

Abstract

The utility model provides a rotating stand meshing anti-collision structure of a vacuum coating machine, which comprises a vacuum cavity, a rotating stand capable of sliding into the vacuum cavity, an outer tooth large disc concentrically arranged on the rotating stand, a transmission gear arranged in the vacuum cavity, a motor for driving the transmission gear to rotate, and a main shaft connected with the motor and the transmission gear, a rotating arm rotating around the main shaft in the circumferential direction is rotationally installed on the main shaft, a driven gear meshed with the transmission gear all the time is rotationally installed on the rotating arm, the driven gear is used for being meshed with the outer tooth large disc, and the rotating arm is further provided with an elastic device forcing the driven gear to be close to the outer tooth large disc. Due to the fact that the rotating arm is provided with the elastic device, impact force generated in the combination process of the rotating stand and the driven gear can be offset, the transmission gear and the main shaft cannot be damaged by impact, and the elastic device forces the driven gear to be always close to the outer tooth large disc, no matter whether errors exist or not after the rotating stand is moved in place. And the driven gear and the outer tooth large disc can keep precise fit in a self-adaptive manner, so that the constant-speed rotation of the rotating stand is ensured.

Description

Technical Field

[0001] This utility model relates to the field of vacuum coating equipment technology, specifically to a rotating frame meshing anti-collision structure for a vacuum coating machine. Background Technology

[0002] Vacuum coating machines are primarily used for surface coating of various metal workpieces to enhance their properties. During the coating process, a large number of workpieces are placed on a rotating frame inside the vacuum chamber, and the surface is uniformly coated as the frame rotates at a constant speed. To facilitate the placement and removal of a large number of workpieces from the rotating frame, one approach is to make the frame a movable structure, allowing it to move in and out of the vacuum chamber along a track. In this case, the rotating frame and the transmission gears driving its rotation need to be frequently engaged. Due to the large size and weight of the rotating frame, a significant impact force is generated when it is pushed into the vacuum chamber, potentially damaging the transmission gears and the motor shaft that drives them. Furthermore, during the insertion of the rotating frame, due to precision errors, there may be situations where the fit between the frame and the transmission gears is too tight or too loose, resulting in poor meshing. All of these factors affect the uniform rotation of the frame, thereby impacting the uniformity of the coating. Utility Model Content

[0003] The purpose of this invention is to provide a rotating frame anti-collision structure that is less likely to damage the transmission gears and has good meshing when the rotating frame is moved in.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A rotating frame meshing anti-collision structure for a vacuum coating machine includes a vacuum chamber, a rotating frame that can be slidably moved into the vacuum chamber, an external gear disk concentrically mounted on the rotating frame, a transmission gear with its axis parallel to the external gear disk located inside the vacuum chamber, a motor that drives the transmission gear to rotate, a main shaft connecting the motor and the transmission gear, a rotating arm that rotates circumferentially around the main shaft rotatably mounted on the main shaft, and a driven gear that is always meshed with the transmission gear rotatably mounted on the rotating arm. The driven gear is used to mesh with the external gear disk, and the rotating arm is also provided with an elastic device that forces the driven gear to move closer to the external gear disk.

[0006] In a preferred embodiment, the elastic device includes an adjusting rod disposed on the side of the rotating arm away from the rotating frame and arranged along the translational direction of the rotating frame; it also includes a mounting plate through which the adjusting rod passes; and a compression spring sleeved on the adjusting rod and abutting against the mounting plate and the rotating arm.

[0007] In a preferred embodiment, the mounting plate has an elongated hole through which the adjusting rod slides.

[0008] In a preferred embodiment, the elastic device is a torsion spring disposed between the rotating arm and the main shaft.

[0009] In a preferred embodiment, the rotating arm is rotatably mounted to the main shaft via a first bearing, and the rotating arm is mounted to the driven gear via a second bearing.

[0010] In a preferred embodiment, the vacuum chamber is a cavity with its centerline vertically aligned, and the front side of the vacuum chamber is provided with an openable and closable door. The bottom inner part of the vacuum chamber is provided with a slide rail for the rotating frame to slide, and the transmission gear is located at the outer end of the slide rail away from the door.

[0011] The beneficial effects of this utility model are as follows: After the rotating frame is pushed into the vacuum chamber, the external gear disc will first contact the driven gear, and under the elastic force of the elastic device, it will mesh with the driven gear, thereby indirectly completing the transmission connection with the transmission gear; because the rotating arm is equipped with an elastic device, the impact force during the engagement of the rotating frame and the driven gear will be canceled out. Compared with the prior art, it will not damage the transmission gear and the main shaft. Furthermore, because the elastic device forces the driven gear to always move closer to the external gear disc, regardless of whether there is an error after the rotating frame is moved into place, the driven gear and the external gear disc can adaptively maintain a precise fit, ensuring the uniform rotation of the rotating frame. Attached Figure Description

[0012] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0013] Figure 1 This is a schematic diagram of the overall installation structure of the anti-collision structure in the embodiment;

[0014] Figure 2 This is a schematic diagram of the installation structure of the drive gear device in the embodiment. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings:

[0016] refer to Figure 1 and Figure 2This embodiment of a vacuum coating machine includes a rotating frame meshing anti-collision structure, comprising a vacuum chamber 1, a rotating frame 2 slidably movable into the vacuum chamber 1, an external gear disk 21 concentrically mounted on the rotating frame 2, a drive gear device 3 provided in the vacuum chamber 1, the drive gear device 3 including a transmission gear 31 whose axis is parallel to the external gear disk 21, a motor driving the transmission gear 31 to rotate, and a main shaft 32 connecting the motor and the transmission gear 31. The motor can directly drive the main shaft to rotate, or indirectly drive the main shaft to rotate through a pulley, etc. A rotating arm 33 is rotatably mounted on the main shaft 32 and rotates around the main shaft 32. A driven gear 34 that is always meshed with the transmission gear 31 is rotatably mounted on the rotating arm 33. The driven gear 34 is used to mesh with the external gear disk 21. The rotating arm 33 is also provided with an elastic device 35 that forces the driven gear 34 to move closer to the external gear disk 21.

[0017] After the rotating frame 2 is pushed into the vacuum chamber 1, the external gear disk 21 will first contact the driven gear 34. Under the impact of the rotating frame 2, the driven gear 34 will retreat with the rotating arm 33 and mesh with the driven gear 34 under the elastic force of the elastic device 35, so that the external gear disk 21 is indirectly connected to the transmission gear 31. Since the rotating arm 33 is equipped with the elastic device 35, the impact force during the engagement of the rotating frame 2 and the driven gear 34 will be canceled. Compared with the prior art, the transmission gear 31 and the main shaft 32 will not be damaged. Furthermore, because the elastic device 35 forces the driven gear 34 to always move closer to the external gear disk 21, regardless of whether there is an error after the rotating frame 2 is moved into place, the driven gear 34 and the external gear disk 21 can adaptively maintain a precise fit, ensuring the uniform rotation of the rotating frame 2.

[0018] In a preferred embodiment, the elastic device 35 includes an adjusting rod 351, which is located on the side of the rotating arm 33 away from the rotating frame 2 and is arranged along the translational direction of the rotating frame 2. It also includes a mounting plate 352 through which the adjusting rod 351 passes, and a compression spring 353 sleeved on the adjusting rod 351 and abutting against the mounting plate 352 and the rotating arm 33. When impacted by the rotating frame 2, the adjusting rod 351 moves backward through the mounting plate 352, while the compression spring 353 abutting against the mounting plate 352 and the rotating arm 33 provides an elastic restoring force to the rotating arm 33. In other embodiments, the elastic device 35 is a torsion spring disposed between the rotating arm 33 and the main shaft 32, which forces the rotating arm 33 to return to the rotating frame 2 side; or a tension spring that pulls the rotating arm 33 to return to the rotating frame 2 side, with the other end of the tension spring fixedly installed inside the vacuum chamber 1.

[0019] In a preferred embodiment, the mounting plate 352 has an elongated hole through which the adjusting rod 351 slides. Since the rotating arm 33 rotates around the main shaft 32, the adjusting rod 351 moves backward while simultaneously translating. The elongated hole provides space for the adjusting rod 351 to move, while preventing the adjusting rod 351 from disengaging.

[0020] In a preferred embodiment, the rotating arm 33 is rotatably mounted to the main shaft 32 via a first bearing 331, and the rotating arm 33 is mounted to the driven gear 34 via a second bearing 341. This ensures smooth rotation of both the rotating arm 33 and the driven gear 34.

[0021] In a preferred embodiment, the vacuum chamber 1 is a cavity with its centerline vertically aligned. The front of the vacuum chamber 1 has an openable and closable door 11, and the bottom inner surface of the vacuum chamber 1 has a slide rail 12 for the rotating frame 2 to slide on. The transmission gear 31 is located at the outer end of the slide rail 12 away from the door 11. The driven gear 34 is positioned facing the rotating frame 2, allowing the elastic force of the elastic device 35 to be fully applied to the driven gear 34, thereby ensuring a reliable engagement between the driven gear 34 and the external gear disc 21.

[0022] The above description does not limit the technical scope of this utility model. Any modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this utility model shall still fall within the scope of the technical solution of this utility model.

Claims

1. A rotating frame meshing anti-collision structure for a vacuum coating machine, characterized in that: The device includes a vacuum chamber, a rotating frame that can slide and translate into the vacuum chamber, an external gear disk concentrically mounted on the rotating frame, a transmission gear with its axis parallel to the external gear disk located inside the vacuum chamber, a motor that drives the transmission gear to rotate, a main shaft connecting the motor and the transmission gear, a rotating arm that rotates circumferentially around the main shaft and a driven gear that is always meshed with the transmission gear and is used to mesh with the external gear disk, and the rotating arm is also provided with an elastic device that forces the driven gear to move closer to the external gear disk.

2. The rotating frame meshing anti-collision structure of a vacuum coating machine according to claim 1, characterized in that: The elastic device includes an adjusting rod disposed on the side of the rotating arm away from the rotating frame and arranged along the translational direction of the rotating frame; it also includes a mounting plate through which the adjusting rod passes; and a compression spring sleeved on the adjusting rod and abutting against the mounting plate and the rotating arm.

3. The rotating frame meshing anti-collision structure of a vacuum coating machine according to claim 2, characterized in that: The mounting plate has an elongated hole through which the adjusting rod slides.

4. The rotating frame meshing anti-collision structure of a vacuum coating machine according to claim 1, characterized in that: The elastic device is a torsion spring disposed between the rotating arm and the main shaft.

5. The rotating frame meshing anti-collision structure of a vacuum coating machine according to claim 1, characterized in that: The rotating arm is rotatably mounted to the main shaft via a first bearing, and the rotating arm is mounted to the driven gear via a second bearing.

6. The rotating frame meshing anti-collision structure of a vacuum coating machine according to claim 1, characterized in that: The vacuum chamber is a cavity with its centerline vertically arranged. The front side of the vacuum chamber is provided with an openable and closable door. The bottom of the vacuum chamber is provided with a slide rail for the rotating frame to slide on, and the transmission gear is located at the outer end of the slide rail away from the door.

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