Perpendicularity pressure maintaining jig

Abstract

A perpendicularity pressure maintaining jig comprises a base, a pressure maintaining mechanism and an adsorption mechanism. The pressure maintaining mechanism comprises a connecting rod, a base plate, a center shaft, a sliding plate, an ejector rod and a first spring. One end of the ejector rod movably penetrates through the base plate and is provided with a limiting part, the other end of the ejector rod is provided with a clamping part, and the limiting part is a protruding block extending in the axial direction of the ejector rod and located at the end of the ejector rod. One end of the first spring abuts against the clamping part, and the other end of the first spring abuts against the base plate. The adsorption mechanism adsorbs the lens and enables the lens to be tightly attached to the side wall of the base, the ejector rod extends out of the base under the elastic force effect of the first spring, the limiting part supports the bottom of the lens and continues to ascend along with the ejector rod, the lens is tightly attached to the ejector plate, and then the lens is fixed. Therefore, the lens can be tightly attached to the side wall of the base and also can be tightly attached to the top plate in the adhesion process through the action of pushing and lifting.

Description

Technical Field

[0001] The present invention relates to the field of laser radar manufacturing technology, and in particular to a verticality pressure maintaining jig. Background Art

[0002] LiDAR is a commonly used distance measuring sensor with the characteristics of long detection distance, high resolution and low environmental interference. It is widely used in unmanned driving, intelligent robots, drones and other fields. In recent years, autonomous driving technology has developed rapidly, and LiDAR, as its core sensor for distance perception, has become indispensable. In LiDAR, the light beam is reflected by the reflective surface of the scanning device to form a light beam for scanning. One scanning device for LiDAR uses a rotating mirror, and scanning is achieved by rotating the reflective surface of the rotating mirror around the axis of rotation. The detection light generated by the LiDAR is reflected by the reflective surface of the rotating mirror and emitted. Therefore, the posture of the reflective surface of the rotating mirror has an important influence on the emission angle of the detection light. Therefore, the verticality of the rotating mirror needs to be ensured during the manufacturing process of the rotating mirror. Summary of the Invention

[0003] In view of this, the present invention provides a verticality pressure maintaining fixture to solve the above technical problems.

[0004] A verticality pressure-maintaining jig is used to mount a lens on a frame during laser radar production. The frame comprises a triangular base and a circular top plate. The verticality pressure-maintaining jig includes a base, a pressure-maintaining mechanism mounted on the base, and multiple suction mechanisms mounted on the base. The pressure-maintaining mechanism comprises at least three connecting rods mounted on the base, a chassis mounted on the connecting rods, a central shaft movably extending through the center of the base, a sliding plate mounted at one end of the central shaft, multiple ejector pins movably extending through the base, and multiple first springs mounted on the ejector pins. One end of the central shaft is connected to the sliding plate, while the other end movably extends through the base. One end of the ejector pin movably extends through the base and is provided with a limiter, while the other end is provided with a clamping portion. The limiter is a protrusion extending axially along the ejector pin and is located at the end of the ejector pin. The clamping portion has a diameter greater than that of the ejector pin and is clamped to the sliding plate. One end of the first spring abuts against the clamping portion, while the other end abuts against the chassis. The adsorption mechanism is used to adsorb the lens and make the lens close to the side wall of the base. The limiting part extends out of the base and supports the bottom of the lens to rise, so that the lens is in close contact with the top plate.

[0005] Furthermore, the planes where the limiting portions on the two push rods on the same side are located are parallel to each other.

[0006] Furthermore, a positioning portion is provided at one end of the push rod, the diameter of the positioning portion is smaller than the diameter of the push rod and the positioning portion is movably inserted in the chassis.

[0007] Furthermore, the pressure-maintaining mechanism further includes three positioning posts arranged on the base, and one fool-proofing post arranged on the base, and the positioning posts are distributed in a triangular shape on the base.

[0008] Furthermore, the adsorption assembly includes a fixed block arranged on the base, a slider slidably arranged on the base, a guide block arranged on the slider, two second springs arranged between the slider and the fixed block, an adsorption plate arranged on the slider, an adsorption device arranged on the slider, and a limit plate arranged on the adsorption plate.

[0009] Furthermore, the fixed block is fixed on the base, and the fixed block is located in the sliding direction of the sliding block, and the sliding direction of the sliding block is close to or away from the center of the base. One end of the guide block is set at the bottom of the slider, and the other end passes through the base and is provided with a guide slope. One end of the second spring abuts against the fixed block, and the other end abuts against the slider.

[0010] Furthermore, the adsorption plate is arranged on the end surface of the sliding block close to the central axis, and the plane where the adsorption plate is located is perpendicular to the base.

[0011] Furthermore, a plurality of positioning plates are provided on both sides and the bottom of the adsorption plate, and the positioning plates extend out of the end face of the adsorption plate facing the central axis. A plurality of spacer blocks are provided on the end face of the adsorption plate facing the central axis, and the spacer blocks are located at the edge of the end face of the adsorption plate.

[0012] Furthermore, the adsorption device is a suction cup passing through the adsorption plate, one end of the suction cup is used to adsorb the lens, and the other end is connected to an external air pump.

[0013] Furthermore, an arcuate groove is provided on one side of the limiting plate facing the central axis, and the arcuate groove is used to fit with the side wall of the top plate.

[0014] Compared to the prior art, the verticality pressure-maintaining fixture provided by the present invention has one end of the ejector pin movably passed through the base plate and provided with a limiting portion. The limiting portion is a protrusion extending axially along the ejector pin and located at the end of the ejector pin, forming a step to hold the lens to be installed, thereby ensuring accurate positioning. Under the elastic force of the second spring, the adsorption assembly presses the lens against the side wall of the base. Under the elastic force of the first spring, the ejector pin extends from the base, allowing the limiting portion to support the bottom of the lens and continue to rise, bringing the lens into close contact with the top plate. Thus, through a push-and-lift action, the lens can be pressed against both the side wall of the base and the top plate during the adhesion process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural schematic diagram of a verticality pressure-maintaining fixture provided by the present invention.

[0016] Figure 2 for Figure 1 A structural schematic diagram of the verticality pressure maintaining fixture from another perspective.

[0017] Figure 3 for Figure 2 Schematic diagram of the structure of the verticality pressure maintaining fixture removing adsorption mechanism.

[0018] Figure 4 for Figure 1 A schematic structural diagram of the ejector pin of the verticality pressure maintaining fixture.

[0019] Figure 5 for Figure 1 A schematic structural diagram of the adsorption mechanism of the verticality pressure maintaining fixture.

[0020] Figure 6 for Figure 1 A schematic structural diagram of the adsorption mechanism of the verticality pressure maintaining fixture from another angle.

[0021] Figure 7 This is a schematic structural diagram of the skeleton of the laser radar in the prior art. DETAILED DESCRIPTION

[0022] The following is a further detailed description of specific embodiments of the present invention. It should be understood that the description of the embodiments of the present invention herein is not intended to limit the scope of protection of the present invention.

[0023] like Figures 1 to 6, which is a schematic diagram of the structure of the verticality pressure-maintaining jig provided by the present invention. The verticality pressure-maintaining jig includes a base 10, a pressure-maintaining mechanism 20 disposed on the base 10, and a plurality of adsorption mechanisms 30 disposed on the base 10. It is conceivable that the verticality pressure-maintaining jig also includes other functional modules, such as connecting components, fasteners, and mounting components, etc., which are well known to those skilled in the art and will not be described in detail here.

[0024] First of all, it should be noted that the vertical pressure maintaining fixture is used to set the lens on the frame 100 when producing the laser radar. The structure of the frame 100 is as follows: Figure 7 As shown, the frame 100 includes a triangular base 110 and a circular top plate 120. The lens and base 110 are bonded together with glue, so the perpendicularity of the lens and top plate 120 must be ensured during the glue drying process and when the lens is installed. The lens and frame 100 are known in the art and will not be described in detail here.

[0025] The base 10 is used to carry the above-mentioned functional modules, so the base 10 is provided with a variety of functional structures, such as slide grooves, bolts, clamps, etc. to complete the installation and assembly of the above-mentioned functional modules. It can be set according to actual needs and will not be described in detail here.

[0026] The pressure maintaining mechanism 20 includes at least three connecting rods 21 arranged on the base 10, a chassis 22 arranged on the connecting rod 21, a central axis 23 movably passed through the center of the base 10, a sliding plate 24 arranged at one end of the central axis 23, multiple top rods 25 movably passed through the base 10, multiple first springs 26 mounted on the top rods 25, three positioning columns 27 arranged on the base 10, and an anti-fool column 28 arranged on the base 10.

[0027] One end of the connecting rod 21 is connected to the bottom of the base 10, and the other end is connected to the chassis 22. The connecting rods 21 are arranged in a triangular shape to ensure uniform force. One end of the central shaft 23 is connected to the sliding plate 24, and the other end is movable through the base 10. The central shaft 23 is inserted into the center of the skeleton 100 and is spaced apart from the skeleton 100. The downward pressure of the central shaft 23 is controlled by an external mechanical claw. In this embodiment, there are six push rods 25, two of which are arranged on each side. One end of the push rod 25 is movable through the base 10 and is provided with a limit portion 251, and the other end is provided with a clamping portion 252 and a positioning portion 253. The limit portion 251 is a protrusion extending axially along the push rod 25 and is located at the end of the push rod 25. The planes of the limit portions 251 on the two push rods 25 on the same side are parallel to each other, forming a step to lock the lens plate to be installed, thereby ensuring accurate positioning. The diameter of the engaging portion 252 is larger than that of the push rod 25 and engages with the sliding plate 24, thereby enabling the sliding plate 24 and the push rod 25 to move synchronously. The diameter of the positioning portion 253 is smaller than that of the push rod 25 and is movably inserted into the chassis 22. The positioning portion 253 is used to locate the position of the push rod 25 and to accommodate the first spring 26. The first spring 26 is mounted on the positioning portion 253, with one end of the first spring 26 abutting against the engaging portion 252 and the other end against the chassis 22. In the free state, the elastic force of the first spring 26 causes the push rod 25 to move away from the chassis 22, causing the stopper 251 to extend from the base 10. After the lens is attached to the side wall of the base 110 via the suction assembly 30, the push rod 25 extends from the base 10, causing the stopper 251 to support the bottom of the lens and continue to rise, bringing the lens into close contact with the top plate 120. Because the central shaft 23 is connected to the sliding plate 24, pressing the central shaft 23 can drive the sliding plate 24 downward, thereby compressing the first spring 26 to control the position of the ejector 25. The positioning posts 27 are distributed in a triangular shape on the base 10 and are used to be inserted into the workpiece to be processed to position and secure the workpiece. The anti-fouling posts 28 are used to ensure the accuracy of the workpiece position.

[0028] The adsorption assembly 30 includes a fixed block 31 arranged on the base 10, a slider 32 slidably arranged on the base 10, a guide block 33 arranged on the slider 32, two second springs 34 arranged between the slider 32 and the fixed block 31, an adsorption plate 35 arranged on the slider 32, an adsorption device 36 arranged on the slider 32, and a limit plate 37 arranged on the adsorption plate 35.

[0029] The fixed block 31 is fixed on the base 10. The fixed block 31 is located in the sliding direction of the sliding block 32 and is used to limit the sliding position of the sliding block 32. The sliding direction of the sliding block 32 is close to or away from the center of the base 10. One end of the guide block 33 is set at the bottom of the slider 32, and the other end passes through the base 10 and is provided with a guide slope 331. The slider 32 can be driven to move by an external driving device, such as by driving an external roller vertically upward to push the guide block 33 to move the slider 32. One end of the second spring 34 abuts against the fixed block 31, and the other end abuts against the slider 32. When the external driving device is reset, the slider 32 is pushed toward the center of the base 10 by the elastic force of the second spring 34 itself.

[0030] The suction plate 35 is disposed on the end surface of the sliding block 32 near the central axis 23. The plane of the suction plate 35 is perpendicular to the base 10, ensuring that the lens can be placed vertically. Multiple positioning plates 351 are provided on both sides and the bottom of the suction plate 35. The positioning plates 351 extend from the end surface of the suction plate 35 facing the central axis 23. When the lens is placed on the suction plate 35, the sides and bottom are restrained by the positioning plates 351 to determine the placement position. Multiple spacers 352 are provided on the end surface of the suction plate 35 facing the central axis 23. The spacers 352 are located at the edges of the end surface of the suction plate 35. Since the lens surface is very flat and smooth, if the lens is directly attached to the suction plate 35 over a large area, it is easy for the air between the two to be squeezed out, causing the lens to be directly attached to the suction plate 35. In this case, even if the suction device 36 is stopped, the lens will still be attached to the suction plate 35 due to the difference in air pressure, making it difficult to control. Therefore, the spacers 352 are used to separate the lens and the suction plate 35 to allow air circulation and ensure the same pressure. The suction device 36 is a suction cup that passes through the suction plate 35. One end of the suction cup is used to absorb the lens, and the other end is connected to an external air pump, which controls the start and stop of the suction device 36. The side of the limit plate 37 facing the central axis 23 is provided with an arc-shaped groove 371, which is used to mate with the side wall of the top plate 120.

[0031] During use, the mechanical claw first places the skeleton 100 into the pressure-maintaining mechanism 20, inserting the positioning post 27 into the skeleton 100. Simultaneously, the external ejector pin depresses the central axis 23, driving the ejector rod 25 downward and compressing the first spring 26. Next, an external drive device pushes the guide block 33, causing the slider 32 to retreat and compress the second spring 34. Simultaneously, a lens is manually or robotically placed on the suction plate 35. The lens is positioned and fixed using the multiple positioning plates 351. The suction device 36 is activated to hold the lens in place. The external drive device then resets, and the elastic force of the second spring 34 pushes the slider 32 toward the center of the base 10, thereby pressing the lens against the sidewall of the base 110. Finally, the external ejector pin that originally pressed down the central axis 23 is retracted, and the elastic force of the first spring 26 causes the ejector rod 25 to move away from the chassis 22, so that the limiting portion 251 extends out of the base 10 and supports the bottom of the lens. As it continues to rise, an upward force is applied to the lens to ensure that the lens is tightly attached to and perpendicular to the top plate 120 until the glue is completely dry, thereby ensuring both the verticality and the horizontality of the lens.

[0032] Compared with the prior art, the verticality pressure-maintaining fixture provided by the present invention has one end of the push rod 25 movably passed through the base plate 10 and provided with a limiting portion 251. The limiting portion 251 is a protrusion extending axially along the push rod 25 and located at the end of the push rod 25, forming a step to clamp the lens to be installed, thereby ensuring the accuracy of the position. The adsorption component 20 will press the lens against the side wall of the base 110 under the elastic force of the second spring 34, and the push rod 25 will extend out of the base 10 under the elastic force of the first spring 26, so that the limiting portion 251 supports the bottom of the lens and continues to rise, so that the lens is in close contact with the top plate 120. Therefore, through the pushing and lifting action, the lens can be in close contact with both the side wall of the base 110 and the top plate 120 during the adhesion process.

[0033] The above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements or improvements within the spirit of the present invention are included in the scope of the claims of the present invention.

Claims

1. A verticality pressure-maintaining jig, which is used to set a lens on a frame when producing a laser radar, and the frame includes a triangular base and a circular top plate, characterized in that: The verticality pressure-maintaining fixture includes a base, a pressure-maintaining mechanism arranged on the base, and a plurality of adsorption mechanisms arranged on the base, the pressure-maintaining mechanism includes at least three connecting rods arranged on the base, a chassis arranged on the connecting rod, a central axis movably passed through the center of the base, a sliding plate arranged at one end of the central axis, a plurality of ejector rods movably passed through the base, and a plurality of first springs sleeved on the ejector rods, one end of the central axis is connected to the sliding plate, and the other end movably passes through the base, one end of the ejector rod movably passes through the base plate and is provided with a limiting portion, and the other end is provided with a clamping portion, the limiting portion is a convex block extending along the axial direction of the ejector rod and is located at the end of the ejector rod, the diameter of the clamping portion is larger than the diameter of the ejector rod and is clamped with the sliding plate, one end of the first spring abuts against the clamping portion, and the other end abuts against the chassis, the adsorption mechanism is used to adsorb the lens and make the lens close to the side wall of the base, the limiting portion extends out of the base and supports the bottom of the lens to rise, so that the lens is close to the top plate.

2. The verticality pressure-maintaining fixture according to claim 1, characterized in that: The planes where the limiting parts on the two push rods on the same side are located are parallel to each other.

3. The verticality pressure-maintaining fixture according to claim 1, characterized in that: A positioning portion is provided at one end of the push rod. The diameter of the positioning portion is smaller than the diameter of the push rod and the positioning portion is movably inserted in the chassis.

4. The verticality pressure-maintaining fixture according to claim 1, characterized in that: The pressure-maintaining mechanism further includes three positioning posts arranged on the base, and an anti-foolproofing post arranged on the base, and the positioning posts are distributed on the base in a triangular shape.

5. The verticality pressure-maintaining fixture according to claim 1, characterized in that: The adsorption assembly includes a fixed block arranged on the base, a slider slidably arranged on the base, a guide block arranged on the slider, two second springs arranged between the slider and the fixed block, an adsorption plate arranged on the slider, an adsorption device arranged on the slider, and a limit plate arranged on the adsorption plate.

6. The verticality pressure-maintaining jig according to claim 5, characterized in that: The fixed block is fixed on the base, and the fixed block is located in the sliding direction of the sliding block, and the sliding direction of the sliding block is close to or away from the center of the base. One end of the guide block is set at the bottom of the sliding block, and the other end passes through the base and is provided with a guiding inclined surface. One end of the second spring abuts against the fixed block, and the other end abuts against the sliding block.

7. The verticality pressure-maintaining fixture according to claim 5, characterized in that: The adsorption plate is arranged on the end surface of the sliding block close to the central axis, and the plane where the adsorption plate is located is perpendicular to the base.

8. The verticality pressure-maintaining jig according to claim 5, characterized in that: A plurality of positioning plates are arranged on both sides and the bottom of the adsorption plate, and the positioning plates extend out of the end surface of the adsorption plate facing the central axis. A plurality of spacer blocks are arranged at intervals on the end surface of the adsorption plate facing the central axis, and the spacer blocks are located at the edge of the end surface of the adsorption plate.

9. The verticality pressure-maintaining jig according to claim 5, characterized in that: The adsorption device is a suction cup passing through the adsorption plate, one end of the suction cup is used to adsorb the lens, and the other end is connected to an external air pump.

10. The verticality pressure-maintaining jig according to claim 5, characterized in that: An arc-shaped groove is provided on one side of the limiting plate facing the central axis, and the arc-shaped groove is used to fit with the side wall of the top plate.

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