Auxiliary fixing device for screw fastening

Abstract

The invention relates to an auxiliary fixing device for screw fastening. The auxiliary fixing device comprises a fixing assembly, a connecting piece and a clamping assembly. The fixing assembly can be arranged in a fixed position; the connecting piece is connected with the fixing assembly and the clamping assembly and can limit the clamping assembly to move in the radial direction. The clamping assembly comprises a limiting assembly and an abutting assembly. The limiting assembly is fixedly connected with the connecting piece and provided with a through hole allowing the screw to penetrate through, and the limiting assembly is provided with a first containing part and a second containing part. The first containing part is arranged on the bottom face of the limiting assembly and used for containing the gasket. The second containing part is adjacent to the through hole, at least penetrates through the top face of the limiting assembly, communicates with the first containing part and is used for containing the abutting assembly. The abutting assembly can move in the second containing part in the direction close to or away from the axis of the first containing part so as to be matched with the second containing part to clamp or release the gasket. The mounting precision of the fixing part can be improved.

Description

Technical Field

[0001] This invention relates to the field of optical precision assembly technology, and in particular to an auxiliary fixing device for screw fastening. Background Technology

[0002] In long-distance optical dimming systems (such as laser communication equipment, long-distance rangefinders, and astronomical observation equipment), the fixing components of core optical components (such as lens mounts, prism supports, and optical path adjustment modules) are typically fastened using combination screws (screws + washers). The positional accuracy of these fixing components directly determines the collimation of the optical path and is extremely sensitive to micron-level offsets during the fastening process (typically requiring an offset ≤0.5μm). Once the fixing component undergoes a tiny displacement, it will lead to serious problems such as optical path misalignment, signal attenuation, and decreased measurement accuracy.

[0003] In existing combination screw fastening technology, the main methods to address misalignment include: 1) Using anti-slip pads (such as rubber pads or toothed pads) can reduce displacement by increasing the friction between the pads and the fasteners. However, the friction coefficient of the anti-slip pads is limited. The axial torque when tightening the screws will still cause the pads to slide slightly, which will then be transmitted to the fasteners, making it impossible to completely eliminate the offset.

[0004] 2) Increase the preload or use adhesive pads. Excessive preload can cause deformation of the fasteners (optical components are mostly made of brittle materials and are easily damaged). Adhesive pads cannot be reused and will leave adhesive residue that contaminates the components during disassembly.

[0005] 3) Using clamps to fix the body of the fastener can only limit the displacement of the fastener, but the relative sliding between the screw and the washer will still be transmitted to the fastener through contact stress, causing relative displacement.

[0006] The core flaw of the aforementioned technology lies in its failure to address the fundamental issue of "relative displacement between the washer and the fastener during screw tightening." The minute slippage between the washer and the fastener is the direct cause of fastener misalignment. Existing technologies have not achieved displacement-free constraint between the washer and the fastener, thus failing to eliminate micrometer-level misalignment at its source. This problem urgently needs to be solved. Summary of the Invention

[0007] This invention discloses a method aimed at solving the technical problems existing in the prior art.

[0008] The present invention adopts the following technical solution: This invention provides an auxiliary fixing device for screw fastening, comprising a fixing component, a connecting member, and a clamping component; the fixing component is fixed in position; the connecting member connects the fixing component and the clamping component and restricts the radial movement of the clamping component; the clamping component includes a limiting component and an abutting component; the limiting component is fixed to the connecting member and has a through hole for the screw to pass through, and the limiting component has a first receiving portion and a second receiving portion; the first receiving portion is disposed on the bottom surface of the limiting component for receiving a washer; the second receiving portion is disposed adjacent to the through hole and at least penetrates the top surface of the limiting component and communicates with the first receiving portion for receiving the abutting component; the abutting component is movable within the second receiving portion, the moving direction being towards or away from the axis of the first receiving portion, so as to cooperate with the second receiving portion to clamp or release the washer.

[0009] In the screw fastening auxiliary fixing device of the present invention, the abutting component includes an abutting member and a pushing member; the abutting member is used to abut the circumferential side of the gasket; the pushing member is disposed on the side of the abutting member away from the gasket, and its end protrudes from the top of the second receiving portion, and is used to abut and push the abutting member toward the axis of the first receiving portion so that the abutting member abuts the gasket.

[0010] In the screw fastening auxiliary fixing device of the present invention, the surfaces on which the abutting member and the pushing member abut against each other are inclined surfaces.

[0011] In the screw fastening auxiliary fixing device of the present invention, the surface of the abutting member that abuts against the gasket is a surface that is adapted to fit and conform to the circumferential side surface of the gasket.

[0012] The screw fastening auxiliary fixing device of the present invention further includes a negative pressure device; the negative pressure device applies negative pressure to the top surface of the gasket in the first receiving portion through the communicating channel in the limiting component.

[0013] In the screw fastening auxiliary fixing device of the present invention, the communicating channel includes an air inlet, a distribution chamber and a plurality of air outlets; one end of the air inlet is connected to the negative pressure device through the side of the limiting component, and the other end is connected to the distribution chamber; one end of each of the air outlets is connected to the distribution chamber and the other end is connected to the first receiving part, so as to adsorb the gasket.

[0014] In the screw fastening auxiliary fixing device of the present invention, the distribution cavity is an annular cavity arranged around the through hole; the plurality of air outlets are evenly distributed along the extension direction of the distribution cavity.

[0015] The screw fastening auxiliary fixing device of the present invention further includes a deformable ventilated sheet; the deformable ventilated sheet is disposed between the first receiving portion and the top surface of the gasket.

[0016] In the screw fastening auxiliary fixing device of the present invention, the fixing component, the connector and the clamping component form a gantry structure, the connector is fixedly connected to the clamping component and movably connected to the fixing component so that the fixing component can move closer to or further away from the connector.

[0017] In the auxiliary fixing device for screw fastening of the present invention, the fixing component is a negative pressure suction cup, and the fixing component is connected by a sleeve component; the sleeve component includes a first sleeve, a second sleeve and an elastic ring; one end of the first sleeve is sealed to the connector and is arranged perpendicular to the connector; one end of the second sleeve is disposed inside the first sleeve and is sealed to the first sleeve by the elastic ring, and the other end is connected to the suction cup surface of the fixing component.

[0018] In the screw fastening auxiliary fixing device of the present invention, both the first sleeve and the second sleeve are non-circular tubes.

[0019] In the screw fastening auxiliary fixing device of the present invention, the fixing component is a negative pressure suction cup.

[0020] In the screw fastening auxiliary fixing device of the present invention, the fixing component, the connector and the clamping component form a gantry structure; the connector is fixedly connected to the clamping component and rotatably connected to the fixing component, so that the fixing component can rotate closer to or further away from the clamping component.

[0021] The technical solution adopted in this invention can achieve the following beneficial effects: This invention provides an auxiliary fixing device for screw tightening. It is based on fixing components for position fixation, and connecting the fixing components and clamping components through connectors to restrict the movement of the clamping components in the radial direction. The clamping components then clamp the washer, thereby limiting the washer in the radial direction and preventing the washer from moving radially and causing the fixing components to move during the tightening of the screw, thus improving the installation accuracy of the fixing components. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below, forming part of the present invention. The illustrative embodiments of the present invention and their descriptions explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings: Figure 1 This is one of the structural schematic diagrams of an auxiliary fixing device for screw fastening according to the present invention; Figure 2 This is a second schematic diagram of the structure of an auxiliary fixing device for screw fastening according to the present invention; Figure 3 This is one of the structural schematic diagrams of the clamping assembly of the present invention; Figure 4 This is a second schematic diagram of the clamping assembly of the present invention; Figure 5 This is the third schematic diagram of the clamping assembly of the present invention; Figure 6 This is the third structural schematic diagram of an auxiliary fixing device for screw fastening; Figure 7 This is a partial sectional view of an auxiliary fixing device for screw fastening; Figure 8 This is a structural diagram of the deformable breathable sheet of the present invention.

[0023] Explanation of reference numerals in the attached figures: 1. Fixing component; 2. Connecting component; 3. Clamping component; 31. Limiting component; 311. Through hole; 312. First receiving part; 313. Second receiving part; 314. Connecting channel; 3141. Air inlet; 3142. Distribution chamber; 3143. Air outlet; 32. Abutting component; 321. Abutting element; 322. Pushing element; 4. Negative pressure device; 5. Deformable breathable sheet; 6. Sleeve assembly; 61. First sleeve; 62. Second sleeve; 63. Elastic ring; 7. Solenoid valve; 8. Pressure measuring element. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. In the description of this invention, it should be noted that the term "or" is generally used to include the meaning of "and / or," unless otherwise expressly indicated.

[0025] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or a magnetic connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Furthermore, in the description of this application, the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. In the description of this invention, "a plurality of" means at least two, such as two, three, or more, unless otherwise explicitly specified.

[0026] Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0027] To address the problems existing in the prior art, this application provides an auxiliary fixing device for screw fastening.

[0028] like Figures 1-5 As shown, an auxiliary fixing device for fastening a screw C includes a fixing component 1, a connecting member 2, and a clamping component 3. The fixing component 1 can be fixed in position. The connecting member 2 connects the fixing component 1 and the clamping component 3 and can restrict the radial movement of the clamping component 3, such as by selecting a connecting rod. The clamping component 3 includes a limiting component 31 and an abutting component 32. The limiting component 31 is fixed to the connecting member 2 and has a through hole 311 for the screw C to pass through. Specifically, the through hole 311 penetrates the top and bottom surfaces of the limiting component 31. It has a first receiving portion 312 and a second receiving portion 313; the first receiving portion 312 is disposed on the bottom surface of the limiting component 31 and is used to receive the gasket A; the second receiving portion 313 is disposed adjacent to the through hole 311 and at least penetrates the top surface of the limiting component 31, and communicates with the first receiving portion 312, and is used to receive the abutting component 32; the abutting component 32 can move within the second receiving portion 313, and the moving direction is towards or away from the axis of the first receiving portion 312, so as to cooperate with the first receiving portion 312 to clamp or release the gasket A.

[0029] The present invention provides an auxiliary fixing device for screw tightening, which is based on fixing component 1 for position fixing, and connecting component 1 and clamping component 3 through connector 2 to restrict the movement of clamping component 3 in the radial direction. Then, clamping component 3 clamps washer A, thereby limiting washer A in the radial direction and preventing washer A from moving radially and causing fixing component B to move during the tightening of screw C, thus improving the installation accuracy of fixing component B.

[0030] In some preferred embodiments, such as Figure 4 As shown, the first receiving part 312 is adapted to the shape of the gasket A, and is a circular groove. It is coaxially arranged with the through hole 311. The radial dimension of the first receiving part 312 is larger than that of the through hole 311, and the two form a structure similar to a countersunk hole.

[0031] In some preferred embodiments, such as Figure 5As shown, the abutting assembly 32 includes an abutting member 321 and a pushing member 322; the abutting member 321 is used to abut the circumferential side of the gasket A; the pushing member 322 is disposed on the side of the abutting member 321 away from the gasket A, and its end protrudes from the top of the second receiving portion 313, and is used to abut and push the abutting member 321 toward the axis of the first receiving portion 312 so that the abutting member 321 abuts the gasket A; based on the method of clamping the gasket A by the cooperation of the abutting member 321 and the pushing member 322, it can be applied to gaskets A of different sizes, thus improving the applicability.

[0032] Preferably, the surfaces of the abutting member 321 and the pushing member 322 that abut against each other are inclined surfaces; this reduces the force required to drive the abutting member 321 to move. Specifically, the abutting member 321 is a right-angled trapezoidal block with an inclined edge for abutting against the pushing member 322. The pushing member 322 has a tapered bottom end that fits against the inclined surface of the abutting member 321. The pushing member 322 moves downwards, pushing the pushing member 322 towards the pad A.

[0033] Preferably, the surface of the abutting member 321 that abuts against the gasket A is a surface that fits and conforms to the circumferential side surface of the gasket A; thereby increasing the contact area with the gasket A, increasing the force, and thus improving the torsional resistance when tightening the screw C.

[0034] In some preferred embodiments, such as Figure 1 As shown, it also includes a negative pressure device 4; the negative pressure device 4 uses the connecting channel 314 in the limiting component 31 to perform negative pressure adsorption on the top surface of the gasket A in the first receiving part 312; based on this, when fixing the fixing member B, the negative pressure device 4 is first used to adsorb the gasket A into the first receiving part 312, and then the pushing member 322 is pushed to move the abutting member 321 to press against the gasket A, fixing the position of the gasket A, and then aligning the gasket A with the mounting hole of the fixing member B, and then fixing the fixing component 1, such as fixing it on the table. At this time, the radial movement of the gasket A is restricted, and then the screw C is tightened.

[0035] Preferably, the negative pressure device 4 can be a vacuum pump.

[0036] Preferably, it also includes a solenoid valve 7 and a pressure measuring element 8; the negative pressure device 4 connects to the connecting channel 314 through the solenoid valve 7 to adjust the negative pressure value in the connecting channel 314, thereby adjusting the adsorption force of the gasket A, and measures the pressure value in the connecting channel 314 through the pressure measuring element 8.

[0037] Preferably, the connecting channel 314 includes an air inlet 3141, a distribution cavity 3142, and multiple air outlets 3143; one end of the air inlet 3141 is connected to the negative pressure device 4 through the side of the limiting component 31, and the other end is connected to the distribution cavity 3142; one end of each air outlet 3143 is connected to the distribution cavity 3142, and the other end is connected to the first receiving part 312, so as to adsorb the gasket A; based on this, the adsorption force on the gasket A is more uniform, ensuring that it fits against the bottom of the groove of the first receiving part 312. If the bottom of the groove is flat, then when the gasket A is placed on the fixing member B, it is ensured that it fits against the surface of the fixing member B.

[0038] Preferably, the distribution cavity 3142 is an annular cavity surrounding the through hole 311; multiple air outlets 3143 are evenly distributed along the extension direction of the distribution cavity 3142. Based on this, it is ensured that the length of each air outlet 3143 is consistent, and thus the adsorption force of each air outlet 3143 on the gasket A is consistent.

[0039] Preferably, the multiple air vents 3143 are arranged in two rings to improve the uniformity of the adsorption force on the gasket B.

[0040] Preferably, it further includes a deformable breathable sheet 5; the deformable breathable sheet 5 is disposed between the first receiving portion 312 and the top surface of the gasket A, and is an annular sheet. Specifically, the circumferential side of the deformable breathable sheet 5 is a sealing surface. Based on the provision of the deformable breathable sheet 5, the uniformity of the adsorption force on the gasket A is further improved, and based on the elastic deformation of the deformable breathable sheet 5, the flatness requirement of the groove bottom surface of the first receiving portion 312 can be reduced, reducing the processing difficulty. When tightening the screw C, the negative pressure device 4 can be used first to adsorb the gasket A onto the deformable breathable sheet 5, then the gasket A is aligned with the mounting hole of the fixing member B, and then the gasket A is pressed against the surface of the fixing member B to fix the fixing assembly 1. Then, the pushing member 322 is pushed to move the abutting member 321 to press against the gasket A, fixing the position of the gasket A. At this time, the radial movement of the gasket A is restricted, and then the screw C is tightened. More preferably, the deformable breathable sheet 5 is a composite polyurethane sponge with a reinforcing fiber layer.

[0041] More preferably, such as Figure 8As shown, the deformable breathable sheet 5 includes a polyurethane foam layer 51 and a fiber fabric layer 52. The polyurethane foam layer 51 is a soft polyurethane foam, disposed on both sides of the fiber fabric layer 52, i.e., the fiber fabric layer 52 is sandwiched between the polyurethane foam layers 51. The two can be laminated together using a lamination process. Based on this, a sandwich-like layer structure is adopted, and the elastic sealing properties of the polyurethane foam and the structural reinforcement properties of the fiber fabric complement each other, solving the problems of easy deformation, uneven sealing, weak torsional shear strength, and poor durability of single-material sponges in micro-environmental applications. Especially when the thickness is less than 1 mm, it can still maintain structural strength, elasticity, and structural integrity. Further preferably, the thickness of the deformable breathable sheet 5 is less than or equal to 1 mm, such as 0.3 mm, 0.5 mm, or 0.7 mm, to reduce the size of the device.

[0042] In some preferred embodiments, the fixing component 1, the connector 2, and the clamping component 3 form a gantry structure. The connector 2 is fixedly connected to the clamping component 3 and movably connected to the fixing component 1, and their relative positions can be fixed so that the fixing component 1 can move closer to or further away from the connector 2. Based on this, it can be applied to fixing components B of different thicknesses, that is, the height of the fixing component 1 can be changed.

[0043] Preferably, such as Figure 6 and Figure 7 As shown, the fixing component 1 is a negative pressure suction cup, and the fixing component 1 is connected by a sleeve component 6. The sleeve component 6 includes a first sleeve 61, a second sleeve 62, and an elastic ring 63. One end of the first sleeve 61 is sealed to the connector 2 and is set perpendicular to the connector 2. One end of the second sleeve 62 is located inside the first sleeve 61 and is sealed to the first sleeve 61 by the elastic ring 63, and the other end is connected to the suction cup surface of the fixing component 1. Based on this, on the one hand, the height of the fixing component 1 can be adjusted, and on the other hand, the gasket A can be pressed tightly against the surface of the fixing component B. Especially when used with the deformable breathable sheet 5, it can adapt to different adsorption forces of the negative pressure device 4, improving its applicability.

[0044] Preferably, both the first sleeve 61 and the second sleeve 62 are non-circular tubes to avoid relative rotation between the first sleeve 61 and the second sleeve 62.

[0045] Preferably, the assembly also includes a sealing element 64. The first sleeve 61 and the second sleeve 62 are connected to the outside through a connecting hole, and the connecting hole is sealed by the sealing element 64. This facilitates pressure relief and adjustment of the height of the fixing component 1. Specifically, the sealing element 64 can be a sealing plug, a sealing bolt, or other sealing methods, as long as it can seal the connecting hole.

[0046] In some preferred embodiments, the fixing component 1 is a negative pressure suction cup; the negative pressure device 4 is connected to perform a negative pressure extraction operation.

[0047] In some preferred embodiments, such as Figure 2 and Figure 3 As shown, the fixing component 1, the connector 2, and the clamping component 3 form a gantry structure; the connector 2 is fixedly connected to the clamping component 3 and rotatably connected to the fixing component 1, so that the fixing component 1 can rotate closer to or further away from the clamping component 3; thus, installation can be achieved under conditions where the mounting surfaces of the fixing component B and the fixing component 1 are not parallel.

[0048] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of the present invention.

Claims

1. An auxiliary fixing device for screw fastening, characterized in that, Includes fixing components, connectors, and clamping components; The fixing component can be fixed in a fixed position; The connector connects the fixing component and the clamping component, and is able to restrict the radial movement of the clamping component; The clamping assembly includes a limiting component and an abutment component; The limiting component is fixed to the connector and has a through hole for the screw to pass through. The limiting component has a first receiving portion and a second receiving portion. The first receiving portion is disposed on the bottom surface of the limiting component and is used to receive the gasket; The second receiving portion is disposed adjacent to the through hole and at least penetrates the top surface of the limiting component, and communicates with the first receiving portion, for accommodating the abutting component; The abutting component is movable within the second receiving portion, moving towards or away from the axis of the first receiving portion, to cooperate with the first receiving portion to clamp or release the gasket.

2. The auxiliary fixing device for screw fastening according to claim 1, characterized in that, The abutting component includes an abutting element and a pushing element; The abutment is used to abut against the circumferential side of the gasket; The pusher is disposed on the side of the abutment opposite to the gasket, and its end protrudes from the top of the second receiving portion, for abutting and pushing the abutment toward the axis of the first receiving portion so that the abutment abuts against the gasket.

3. The auxiliary fixing device for screw fastening according to claim 2, characterized in that, The surfaces on which the abutting member and the pushing member abut each other are inclined surfaces.

4. The auxiliary fixing device for screw fastening according to claim 2, characterized in that, The surface of the abutment that abuts against the gasket is adapted to fit and conform to the circumferential side surface of the gasket.

5. The auxiliary fixing device for screw fastening according to claim 1, characterized in that, It also includes negative pressure equipment; The negative pressure device applies negative pressure to the top surface of the gasket in the first accommodating part through the connecting channel in the limiting component.

6. The auxiliary fixing device for screw fastening according to claim 5, characterized in that, The connecting channel includes an air inlet, a distribution chamber, and multiple air outlets; One end of the air inlet is connected to the negative pressure device through the side of the limiting component, and the other end is connected to the distribution chamber; Each of the air outlets has one end connected to the distribution cavity and the other end connected to the first receiving portion to adsorb the gasket.

7. The auxiliary fixing device for screw fastening according to claim 6, characterized in that, The distribution cavity is an annular cavity arranged around the through hole; The multiple air outlets are evenly distributed along the extension direction of the distribution cavity.

8. The auxiliary fixing device for screw fastening according to claim 5, characterized in that, It also includes deformable breathable sheets; The deformable breathable sheet is disposed between the first receiving portion and the top surface of the gasket.

9. The auxiliary fixing device for screw fastening according to claim 1, characterized in that, The fixing component is a negative pressure suction cup.

10. The auxiliary fixing device for screw fastening according to claim 1, characterized in that, The fixing component, the connector, and the clamping component form a gantry structure; The connector is fixedly connected to the clamping assembly and rotatably connected to the fixing assembly, so that the fixing assembly can rotate closer to or further away from the clamping assembly.

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