Composite hard limiting structure for scanning galvanometer

Abstract

The utility model discloses a composite hard limit structure for a scanning galvanometer, which comprises a metal base body provided with a containing groove and a plurality of buffer holes, the containing groove is located in the middle of the metal base body, and the buffer holes are arranged on the outer side of the containing groove and communicated with the containing groove; the elastic buffer pieces are embedded into the buffer holes in a one-to-one correspondence mode, and a part of each elastic buffer piece protrudes out of the corresponding buffer hole and enters the containing groove; the metal base body is fixed to the top of the galvanometer base body so that the lens rotating shaft and the positioning pin can be located in the containing groove. According to the utility model, the metal matrix is combined with the array type elastic buffer piece, so that high-precision limiting and high-efficiency buffering are realized, the stability and the service life of a galvanometer system under a long-term high-frequency working condition are improved, and the galvanometer system is particularly suitable for high-requirement application scenes such as laser precision processing and the like.

Description

Composite hard-limiting structure for scanning galvanometers Technical Field

[0001] This utility model relates to the field of optical scanning galvanometer technology, and in particular to a composite hard limiting structure for scanning galvanometers. Background Technology

[0002] Optical scanning galvanometers require limiting structures primarily to prevent overtravel of the lens driven by the motor due to mechanical overshoot, control system malfunctions, or external impacts. Without reliable limiting, the lens may collide with the housing or exceed the optical system's design range, causing lens damage, motor overload, or laser path deviation, affecting processing accuracy and equipment lifespan. Current galvanometer systems commonly use limiting structures made of a single material, which has significant drawbacks. While pure metal hard limiting can ensure positioning accuracy, high-speed impacts from the lens generate instantaneous peak stress, which can easily lead to micro-deformation of the rotating shaft or damage to the bearings over long-term use. Pure rubber limiting, although able to buffer impacts, suffers from position drift due to material creep and aging, and rubber is prone to softening and failure at high temperatures. Furthermore, pure rubber limiting has another drawback: the rubber pad must be fixed to the mounting base with adhesive, which can easily cause the rubber pad to loosen and fall off due to vibration, severely affecting the reliability of the limiting. Summary of the Invention

[0003] One object of this invention is to solve at least the aforementioned problems and / or defects, and to provide at least the advantages described below.

[0004] One objective of this invention is to provide a composite hard limiting structure for scanning galvanometers, which can achieve high-precision limiting and efficient buffering through a rigid-flexible composite method, thereby improving the reliability, accuracy and lifespan of the galvanometer system.

[0005] To achieve these objectives and other advantages according to the present invention, a composite hard-limiting structure for a scanning galvanometer is provided, the scanning galvanometer comprising a galvanometer base, a lens shaft rotatably disposed on the galvanometer base, a positioning pin transversely passing through the middle of the lens shaft, and a lens connected to the upper end of the lens shaft; the composite hard-limiting structure includes:

[0006] A metal substrate having a receiving groove and multiple buffer holes, the receiving groove being located in the middle of the metal substrate, and the multiple buffer holes being arranged on the outside of the receiving groove and communicating with the receiving groove;

[0007] Multiple elastic buffers are embedded into the multiple buffer holes in a one-to-one correspondence, and a portion of each elastic buffer protrudes from the corresponding buffer hole and enters the receiving groove;

[0008] The metal substrate is fixed to the top of the galvanometer substrate so that the lens pivot and the positioning pin are located in the receiving groove.

[0009] Preferably, in the composite hard limiting structure for the scanning galvanometer, the plurality of buffer holes are symmetrically distributed relative to the receiving groove.

[0010] Preferably, in the composite hard limiting structure for scanning galvanometer, the receiving groove includes a shaft hole and two wings located on both sides of the shaft hole, and the plurality of buffer holes are respectively disposed on the outer side of the two wings, with each buffer hole communicating with the corresponding wing.

[0011] Preferably, in the composite hard limiting structure for the scanning galvanometer, the plurality of buffer holes are four buffer holes.

[0012] Preferably, in the composite hard limiting structure for the scanning galvanometer, the elastic buffer is a rubber ring.

[0013] Preferably, in the composite hard limiting structure for scanning galvanometers, the metal substrate is fixedly connected to the galvanometer substrate by fixing screws.

[0014] Preferably, in the composite hard limiting structure for scanning galvanometers, the metal substrate has a pair of mounting holes, which are respectively disposed on both sides of the receiving groove, and each mounting hole is provided with a fixing screw.

[0015] This utility model has at least the following beneficial effects:

[0016] This invention provides a composite hard-limiting structure for a scanning galvanometer. The scanning galvanometer includes a galvanometer base, a lens shaft rotatably mounted on the galvanometer base, a positioning pin transversely passing through the middle of the lens shaft, and a lens connected to the upper end of the lens shaft. The composite hard-limiting structure includes: a metal base with a receiving groove and multiple buffer holes. The receiving groove is located in the middle of the metal base, and the multiple buffer holes are arranged outside the receiving groove and communicate with it; multiple elastic buffer members are embedded one-to-one into the multiple buffer holes, and a portion of each elastic buffer member protrudes from the corresponding buffer hole and enters the receiving groove; wherein, the metal base is fixed to the top of the galvanometer base so that the lens shaft and the positioning pin are located within the receiving groove. The composite hard-limiting structure for a scanning galvanometer provided by this invention combines a metal base with an array of elastic buffer members to achieve high-precision limiting and efficient buffering, improving the stability and service life of the galvanometer system under long-term high-frequency operating conditions, and is particularly suitable for high-requirement applications such as laser precision machining.

[0017] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0018] Figure 1 is a schematic diagram of the composite hard limiting structure used for scanning galvanometer in this utility model.

[0019] Figure 2 is a top view of the composite hard limiting structure used for scanning galvanometers in this utility model.

[0020] Figure 3 is a bottom view of the composite hard limiting structure used for scanning galvanometer in this utility model. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0022] As shown in Figures 1 to 3, this utility model provides a composite hard limiting structure for a scanning galvanometer. The scanning galvanometer includes a galvanometer base, a lens shaft rotatably mounted on the galvanometer base, a positioning pin transversely passing through the middle of the lens shaft, and a lens connected to the upper end of the lens shaft. The composite hard limiting structure includes: a metal base 3, which has a receiving groove 4 and multiple buffer holes 7. The receiving groove 4 is located in the middle of the metal base 3, and the multiple buffer holes 7 are arranged on the outside of the receiving groove 4 and communicate with the receiving groove 4; multiple elastic buffer members 2 are embedded into the multiple buffer holes 7 one by one, and a portion of each elastic buffer member 2 protrudes from the corresponding buffer hole 7 and enters the receiving groove 4; wherein, the metal base 3 is fixed to the top of the galvanometer base so that the lens shaft and the positioning pin are located in the receiving groove 4.

[0023] In this embodiment, a metal substrate 3 is used as a rigid substrate, which is fixedly connected to the top of the galvanometer substrate. The lens shaft enters the receiving groove 4 from below the metal substrate 3. Correspondingly, the positioning pin passes laterally through the lens shaft and is also located in the receiving groove. The lens is located at the upper end of the lens shaft, above the limiting structure. The metal substrate 3 and the galvanometer substrate are rigidly locked to ensure zero drift of the limiting reference plane. Multiple buffer holes 7 are precision machined on the surface of the metal substrate 3, and elastic buffer elements 2 are embedded in the buffer holes 7 to form an array-type buffer unit. When the lens shaft rotates, the positioning pin swings with the lens shaft in the receiving groove 4 and contacts the elastic buffer element 2. The elastic buffer element 2 undergoes controllable compression deformation to absorb impact energy, thereby achieving the purpose of limiting the swing angle of the lens. This embodiment realizes the unitization of the buffer function and the modularization of the limiting function, solves the stress concentration problem of pure metal limiting in existing limiting structures, overcomes the creep defect of traditional rubber limiting, and improves the stability and service life of the galvanometer system under long-term high-frequency conditions. It is particularly suitable for high-requirement application scenarios such as laser precision machining.

[0024] In a preferred embodiment, in the composite hard limiting structure for the scanning galvanometer, the plurality of buffer holes 7 are symmetrically distributed relative to the receiving groove 4.

[0025] Multiple buffer holes 7 are symmetrically distributed relative to the receiving groove 4, that is, multiple elastic buffer elements 2 are symmetrically distributed relative to the receiving groove 4. Based on this, when the lens swings in any direction, it can come into contact with the elastic buffer element 2 at the corresponding position, thereby causing the elastic buffer element 2 to undergo controllable compression deformation to absorb impact energy and achieve the purpose of limiting the rotation axis of the lens.

[0026] In a preferred embodiment, in the composite hard limiting structure for scanning galvanometer, the receiving groove 4 includes a shaft hole 5 and two wings 6 located on both sides of the shaft hole 5, and the plurality of buffer holes 7 are respectively disposed on the outer side of the two wings 6, with each buffer hole 7 communicating with the corresponding wing 6.

[0027] The lens pivot is located inside the central shaft hole 5, and the positioning pin is located on both wings 6. Each wing 6 has a set of buffer holes 7 on both sides, corresponding to a set of elastic buffers 2. Based on this design, when the lens swings in any direction, the positioning pin will contact the corresponding elastic buffer 2, thereby achieving the purpose of limiting the movement.

[0028] In a preferred embodiment, the composite hard limiting structure for the scanning galvanometer includes four buffer holes 7.

[0029] Each wing 6 has two buffer holes 7 on each side, corresponding to two elastic buffers 2. Based on this design, the lens will contact the corresponding elastic buffer 2 whenever it swings in any direction, thus achieving the purpose of limiting its movement.

[0030] In a preferred embodiment, in the composite hard limiting structure for the scanning galvanometer, the elastic buffer 2 is a rubber ring.

[0031] When the lens impacts the limit, the rubber ring can undergo controlled compression deformation to absorb the impact energy.

[0032] In a preferred embodiment, in the composite hard limiting structure for the scanning galvanometer, the metal substrate 3 is fixedly connected to the galvanometer substrate by fixing screws.

[0033] In a preferred embodiment, in the composite hard limiting structure for the scanning galvanometer, the metal substrate 3 has a pair of mounting holes 1, which are respectively disposed on both sides of the receiving groove 4, and each mounting hole 1 is provided with a fixing screw.

[0034] This embodiment uses a metal block as a rigid substrate, with four evenly distributed buffer holes 7 precisely machined on its surface. Rubber rings are embedded in the holes to form an array-type buffer unit. When the lens shaft rotates, the positioning pin impacts the rubber rings, causing the rubber rings to undergo controllable compression deformation to absorb the impact energy, thereby limiting the lens's swing angle. The metal substrate 3 is rigidly locked to the galvanometer substrate by two diagonally arranged screws (M1 / M2 specifications), ensuring zero drift of the limiting reference plane. This structure achieves modularization of the buffer function through four independent rubber rings and modularization of the limiting function through an integrally molded metal substrate. It solves the stress concentration problem of pure metal limiting in existing limiting structures, overcomes the creep defect of traditional rubber limiting, and improves the stability and service life of the galvanometer system under long-term high-frequency conditions. It is particularly suitable for high-requirement applications such as laser precision machining.

[0035] Although embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. It can be applied to various fields suitable for this utility model. Other modifications can be readily implemented by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and examples shown and described herein.

Claims

1. A composite hard-limiting structure for scanning galvanometers, characterized in that, The scanning galvanometer includes a galvanometer base, a lens shaft rotatably mounted on the galvanometer base, a positioning pin transversely passing through the middle of the lens shaft, and a lens connected to the upper end of the lens shaft; the composite hard limiting structure includes: a metal base having a receiving groove and multiple buffer holes, the receiving groove being located in the middle of the metal base, the multiple buffer holes being arranged outside the receiving groove and communicating with the receiving groove; multiple elastic buffer members, each correspondingly embedded in the multiple buffer holes, and a portion of each elastic buffer member protruding from the corresponding buffer hole and entering the receiving groove; wherein, the metal base is fixed to the top of the galvanometer base so that the lens shaft and the positioning pin are located within the receiving groove.

2. The composite hard-limiting structure for scanning galvanometers as described in claim 1, characterized in that, The plurality of buffer holes are symmetrically distributed relative to the receiving groove.

3. The composite hard-limiting structure for scanning galvanometers as described in claim 2, characterized in that, The receiving groove includes a shaft hole and two wings located on both sides of the shaft hole. The plurality of buffer holes are respectively disposed on the outer side of the two wings, and each buffer hole communicates with the corresponding wing.

4. The composite hard-limiting structure for a scanning galvanometer as described in any one of claims 1 to 3, characterized in that, The plurality of buffer holes are four buffer holes.

5. The composite hard-limiting structure for scanning galvanometers as described in claim 1, characterized in that, The elastic buffer is a rubber ring.

6. The composite hard-limiting structure for scanning galvanometers as described in claim 1, characterized in that, The metal substrate is fixedly connected to the galvanometer substrate by fixing screws.

7. The composite hard-limiting structure for scanning galvanometers as described in claim 6, characterized in that, The metal substrate has a pair of mounting holes, which are respectively located on both sides of the receiving groove, and each mounting hole is provided with a fixing screw.

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