A riveting device

Abstract

The present application relates to a riveting device, belonging to the motor technology field, solves the problem that the positioning and clamping mechanism in the riveting device for riveting the balance column and the balance ring in the prior art cannot effectively clamp multiple types of balance columns, affecting the stability and riveting precision when the balance column and the balance ring are riveted. The present application comprises a support unit, a riveting unit and a clamp unit; the support unit comprises a platform, and a clamp groove is arranged on the upper part of the platform; the clamp unit comprises replaceable clamps; the replaceable clamps are arranged in the clamp groove; the replaceable clamps have central circular holes; the number of replaceable clamps is multiple, the diameters of the central circular holes of the multiple replaceable clamps are different, and they are used for adapting to balance columns with different diameters; and / or the clamp unit further comprises a V-shaped clamp assembly, and the V-shaped clamp assembly comprises a V-shaped clamp and a cylindrical clamp located at the center of the V-shaped clamp. The present application realizes the clamping and positioning of motor balance columns with multiple diameters, and the clamping is stable, and the positioning precision is high.

Description

Technical Field

[0001] This invention relates to the field of motor technology, and more particularly to a riveting device. Background Technology

[0002] The balance column and balance ring assembly of the motor rotor are important components for dynamic balancing. The balance ring and balance column are riveted together, and the positioning accuracy of the balance column and balance ring during riveting is crucial. Existing riveting devices for riveting balance columns and balance rings cannot effectively clamp multiple types of balance columns, affecting the stability and riveting accuracy during the riveting process. Summary of the Invention

[0003] Based on the above analysis, the present invention aims to provide a riveting device to solve the problem that the positioning and clamping mechanism in existing riveting devices for riveting balance columns and balance rings cannot effectively clamp multiple types of balance columns, thus affecting the stability and riveting accuracy of the balance columns and balance rings during riveting.

[0004] The objective of this invention is mainly achieved through the following technical solutions:

[0005] A riveting device for riveting a balance column and a balance ring of a motor, comprising a support unit, a riveting unit, and a clamping unit;

[0006] The support unit includes a platform, and a clamping groove is provided on the upper part of the platform;

[0007] The clamping unit includes a replaceable clamp; the replaceable clamp is disposed in the clamping groove;

[0008] The clamping unit further includes a V-shaped clamping assembly, which includes a V-shaped clamp and a cylindrical clamp located at the center of the V-shaped clamp.

[0009] Furthermore, the V-shaped clamp assembly also includes a vertical plate and a spring; the vertical plate is fixed to one side of the V-shaped edge of the V-shaped clamp.

[0010] Furthermore, the first spring is disposed between the upright plate and the V-shaped side; the length direction of the first spring is perpendicular to the V-shaped side.

[0011] Furthermore, the angle between the two V-shaped sides of the V-shaped clamp is 120°.

[0012] Furthermore, the cylindrical clamp has a circular groove in the middle for inserting a balance column.

[0013] Furthermore, the upper part of the cylindrical clamp is provided with a positioning pin hole circumferentially around its axis.

[0014] Furthermore, the platform has a conical groove, and the V-shaped clamps are disposed on both sides of the conical groove.

[0015] Furthermore, the bottom of the cylindrical clamp has a conical surface, which can be inserted into the conical groove for positioning the cylindrical clamp and the balance column.

[0016] Furthermore, the support unit also includes a bracket and a column; the bracket is disposed above the platform and is used to support the riveting unit; the column is disposed between the bracket and the platform.

[0017] Furthermore, the replaceable clamp has a central circular hole; there are multiple replaceable clamps, and the central circular holes of the multiple replaceable clamps have different diameters to accommodate balance columns of different diameters.

[0018] Furthermore, the cylindrical clamp is also provided with a push block and a second spring; the push block and the second spring are used to clamp the balance column; the push block has an arc-shaped structure, and the arc-shaped structure is coaxial with the cylindrical clamp; the second spring is disposed between the push block and the inner wall of the cylindrical clamp, and the length direction of the second spring is the same as the radial extension line of the arc-shaped structure.

[0019] Furthermore, a sliding groove is provided below the push block, and a protrusion is provided on the lower part of the push block. The protrusion can extend into the sliding groove and move along the sliding groove.

[0020] Furthermore, the cylindrical clamp has an upper part and a lower part. The upper part is provided with the push block and the second spring. A screw and a nut are provided between the upper part and the lower part. The nut is fixed to the lower end face of the upper part and can move on the screw to adapt to the balance column of different heights.

[0021] Furthermore, the screw and the nut are arranged circumferentially along the axis of the cylindrical clamp.

[0022] Furthermore, the cylindrical clamp has a double-layer structure of inner and outer layers, and the sidewalls of both the inner and outer layers are provided with multiple sets of positioning pin holes; each set of positioning pin holes is evenly distributed along the circumference of the cylindrical clamp; the inner layer can be lifted to accommodate balance columns of different heights.

[0023] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0024] (1) Compared with the prior art, this invention, targeting the motor balance column, utilizes the groove of the platform and the clamp to achieve positioning and clamping functions. By replacing the clamps with central holes of different diameters, the clamps can be adapted to balance columns of different diameters. Compared with the prior art, this invention sets a V-shaped clamp, which ensures the positioning accuracy of the balance column, and the V-shaped clamp can clamp balance columns of different diameters, making it highly versatile and easy to install. For balance columns with smaller diameters that cannot be effectively clamped by the V-shaped clamp, a cylindrical clamp is set to ensure the clamping of the balance column.

[0025] (2) A spring is provided on the outside of the V-shaped clamp of the present invention. The spring force direction of the spring is perpendicular to the edge of the V-shaped clamp, so that the balance column or cylindrical clamp at the center of the V-shaped clamp does not deviate.

[0026] (3) In this invention, a cylindrical clamp is set inside the V-shaped clamp, and the balance column is placed at the center of the cylindrical clamp. The balance column is centered and clamped by a positioning pin, and the cylindrical clamp is clamped externally by the V-shaped clamp, which improves the stability of the small-diameter balance column. The bottom of the cylindrical clamp of this invention is provided with a conical surface, which matches the conical clamp groove of the platform, improving the positioning accuracy of the cylindrical clamp and the balance column.

[0027] (4) Compared with the prior art, the present invention has a cylindrical clamp inside the V-shaped clamp, and a push block spring structure inside the cylindrical clamp. The cylindrical clamp has an upper part and a lower part, and a screw and a nut are provided between the upper part and the lower part. The nut is fixed to the upper part and can drive the upper part of the cylindrical clamp to move up and down along the screw, thereby improving the adaptability of the clamp to balance columns of different diameters and avoiding the upper part of the balance column from shaking or breaking due to the riveting force during riveting.

[0028] (5) Compared with the prior art, the cylindrical mold in this invention is set as a double-layer structure with inner and outer layers. The side walls of the inner and outer layers are provided with multiple sets of positioning pin holes to position the balance column at different heights. Furthermore, since multiple sets of positioning pins are inserted along the axis of the balance column to fix it throughout the entire height, the balance column is clamped stably and reliably, which improves the adaptability to the height of the balance column.

[0029] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the specification or be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained from the content specifically pointed out in the text and accompanying drawings. Attached Figure Description

[0030] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0031] Figure 1 This is a schematic diagram of the riveting device in specific embodiment 1;

[0032] Figure 2 This is a schematic diagram of the platform structure in specific embodiment 1;

[0033] Figure 3 This is a schematic diagram of the square clamp in specific embodiment 1;

[0034] Figure 4 This is a schematic diagram of the platform conical groove in specific embodiment 2;

[0035] Figure 5 This is a schematic diagram of the V-shaped clamp unit in specific embodiment 2;

[0036] Figure 6 This is a schematic diagram of the cylindrical clamp in specific embodiment 2;

[0037] Figure 7 This is a schematic diagram of the fixture in specific embodiment 3;

[0038] Figure 8 This is a schematic diagram of the fixture in specific embodiment 4;

[0039] Figure 9 This is a schematic diagram of the fixture in specific embodiment 5.

[0040] Figure label:

[0041] 1-Support unit, 101-Platform, 1011-Column positioning groove, 1012-Clamping groove, 102-Column, 103-Bracket, 2-Riveting unit, 201-Pneumatic rivet gun, 202-Air circuit, 3-Clamping unit, 301-Replaceable clamp, 302-V-type clamp assembly, 3021-Upright plate, 3022-Spring 1, 3023-V-type clamp, 3024-Cylindrical clamp, 30241-Positioning pin hole, 30242-Push block, 30243-Slide groove, 30244-Spring 2, 30245-Nut, 30246-Screw, 4-Balance column. Detailed Implementation

[0042] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0043] Example 1

[0044] A specific embodiment of the present invention, such as Figure 1As shown, a riveting device is disclosed, which is suitable for riveting work between a small batch of motor rotor balance column 4 and balance ring, including a support unit 1, a clamping unit 3 and a riveting unit 2.

[0045] Support unit 1 includes a platform 101, a column 102, and a bracket 103. Platform 101 is located at the lower part of the device and is used to support the workpiece and the fixture unit. Figure 2 As shown, one end of the platform 101 has a clamping groove 1012 with a circular blind hole inside, which is used to place the clamping unit 3. The circular blind hole is used for positioning the balance column 4. The other end has an elliptical stepped groove, which is a column positioning groove 101, used to place the column 102. The column 102 can move in the groove.

[0046] The column 102 is located on one side of the upper part of the platform 101 and is used to support the bracket 103. The bracket 103 is located above the column 102 and is used to support the riveting unit 2. The bracket 103 has three stepped through holes; one stepped through hole at one end is used to embed the riveting unit 2, and the other two stepped through holes at the other end are used to fix the column 102.

[0047] The riveting unit 2 includes a pneumatic rivet gun 201 and an air passage 202. The pneumatic rivet gun 201 and the air passage 202 are connected and used to rivet rivets into workpieces. The stepped portion of the pneumatic rivet gun 201 can be inserted into a circular stepped hole, and the rivet gun barrel portion extends out of the bracket 103 to rivet the workpiece located on the platform 101.

[0048] The fixture unit 3 includes a replaceable fixture 301. For example... Figure 3 As shown, in this embodiment, the replaceable fixture 301 is a rectangular block structure. Correspondingly, the fixture groove 1012 of the platform 101 is a rectangular groove, allowing the replaceable fixture 301 to be embedded in the fixture groove 1012 of the platform 101 for positioning. The replaceable fixture 301 has a central circular hole in the middle corresponding to the circular blind hole in the fixture groove 1012, used for positioning the balance column 4. Threaded holes are provided around the circular hole for inserting bolts to fix the workpiece.

[0049] Furthermore, the replaceable clamps 301 come in various specifications, with different diameters of the central circular holes in multiple replaceable clamps 301, which are used to position balance columns 4 of different diameters.

[0050] In use, first connect the column 102 to the platform 101, then mount the bracket 103 on top of the column 102, and fix the pneumatic rivet gun 201 to the bracket 103. Connect the air passage 202 to the pneumatic rivet gun 201. On the platform 101, fix the replaceable clamp 301 in the square groove 1012 of the platform 101. Place the balance column 4 to be riveted in the center hole of the clamp, mount the balance ring on the balance column 4, and align the nozzle of the pneumatic rivet gun 201 with the riveting position through the bracket 103 to perform the riveting.

[0051] Compared with the prior art, this embodiment uses the clamping groove 1012 of the platform 101 and the replaceable clamp 301 to achieve positioning and clamping functions for the motor balance column 4. By replacing the replaceable clamp 301 with a central hole of different diameter, the replaceable clamp 301 can be used for balance columns 4 of different diameters.

[0052] Example 2

[0053] The improvement of this embodiment compared to Embodiment 1 is that, in order to make the clamp more adaptable to the balance column 4 and to avoid frequent clamp replacements, the clamp in this embodiment adopts a V-shaped clamp assembly 302. To improve the alignment of the clamp, such as... Figure 4 As shown, the rectangular structure of the clamping groove 1012 of the platform 101 is changed to a conical structure.

[0054] like Figure 5 As shown, the V-clamp assembly 302 includes a vertical plate 3021, a spring 3022, and a V-clamp 3023.

[0055] The V-shaped clamp 3023 is positioned at an angle of 120° and is located on both sides of the conical groove 1013. A vertical plate 3021 is provided on one side of the V-shaped clamp 3023, and a spring 3022 is positioned between the vertical plate 3021 and the V-shaped clamp 3023. The V-shaped clamp 3023 includes V-shaped edges. A vertical plate 3021 and a spring 3022 are fixed to one side of each V-shaped edge. It should be noted that, in order to prevent the balance column 4 in the V-shaped clamp 3023 from shifting and to ensure the relative stability of the balance column 4 in the clamp, the length direction of the spring 3022 is perpendicular to the corresponding V-shaped edge, thus the direction of the spring force of the spring 3022 is perpendicular to the V-shaped edge.

[0056] Furthermore, considering that the V-shaped clamp 3023 may not be able to effectively clamp and position the smaller diameter balance column 4, this embodiment provides a cylindrical clamp 3024 in the middle of the V-shaped clamp 3023. For example... Figure 6As shown, the bottom of the cylindrical clamp 3024 is provided with a conical surface 30242, which matches the clamping groove 1012 of the conical groove of the platform 101. The cylindrical clamp 3024 can extend into the clamping groove 1012, and by utilizing the centering property of the cone, the cylindrical clamp 3024 has a high degree of centering.

[0057] Furthermore, the cylindrical clamp 3024 has a circular groove at its center for inserting a smaller diameter balance column 4. The upper part of the cylindrical clamp 3024 is provided with a locating pin hole 30241 around its axis in the circumferential direction for inserting a locating pin. The locating pin abuts against the balance column 4 to position the small-diameter balance column 4.

[0058] V-shaped clamp 3023 is located outside cylindrical clamp 3024, further clamping cylindrical clamp 3024 so that cylindrical clamp 3024 and workpiece will not shift under the action of large riveting force.

[0059] Compared to existing technologies, this embodiment features a V-shaped clamp 3023, ensuring the positioning accuracy of the balance column 4. The V-shaped clamp 3023 can hold balance columns 4 of different diameters, offering strong versatility and convenient clamping. A spring 3022 is externally mounted on the V-shaped clamp 3023, with its elastic force direction perpendicular to the edge of the V-shaped clamp 3023, preventing the balance column 4 or cylindrical clamp 3024 at the center of the V-shaped clamp 3023 from shifting. For smaller diameter balance columns 4 that the V-shaped clamp 3023 cannot effectively hold, a cylindrical clamp 3024 is provided. The cylindrical clamp 3024 matches the tapered groove of the platform 101 via a tapered surface 30241, and the balance column 4 is centered and clamped around its periphery by positioning pins. The external clamping of the cylindrical clamp 3024 by the V-shaped clamp 3023 further enhances the stability of the small-diameter balance column 4.

[0060] Example 3

[0061] In Example 2, when the locating pin clamps the balance column 44, the locating pin needs to have a certain height; balance columns 44 that are lower than the height of the locating pin cannot use it. Figure 7 As shown, in this embodiment, the upper interior of the cylindrical clamp 3024 is a hollow cylindrical structure, and a spring structure of push blocks 30242 is provided inside. The spring structure of push blocks 30242 includes multiple push blocks 30242. In this embodiment, four push blocks 30242 are provided, and the four push blocks 30242 are evenly distributed circumferentially. The main body of the push block 30242 is an arc-shaped plate, which is coaxial with the cylindrical clamp. The inner wall of the arc-shaped plate is used to contact the balance column 4. The part of the arc-shaped plate facing away from the balance column 4 has an extension, and the end of the extension is flat.

[0062] Furthermore, a sliding groove 30243 is provided below the push block 30242, and the sliding groove 30243 is arranged in a cross shape. A protrusion is provided on the lower part of the arc plate of the push block 30242, and the protrusion can extend into the sliding groove 30243 and move along the sliding groove 30243 to make the clamping of the spring 30244 on the balance column 4 stable.

[0063] Furthermore, a spring 30244 is provided between the planar end of the extension and the inner wall of the circular clamp, which is used to push the push block 30242 toward the balance column 4 to clamp the balance column 4. It should be noted that the length direction of the spring 30244 is set in the radial extension direction of the arc plate, and the direction of the elastic force is the same as the radial direction of the balance column 4 clamped by the arc plate, so that the balance column 4 can be clamped stably without deviation.

[0064] Compared with the prior art, this embodiment takes into account the height of the balance column 4 and sets a push block 30242, a spring 30244 and a slide groove 30243 in the cylindrical clamp 3024, so that the cylindrical clamp 3024 can adapt to the small diameter balance column 4, further improving the stability of the small diameter balance column 4, while also ensuring the adaptability of the cylindrical clamp 3024 to balance columns 4 of different heights.

[0065] Example 4

[0066] like Figure 8 As shown, the difference between this embodiment and Embodiment 3 is that, in order to accommodate different heights of the smaller diameter balance column 4, the cylindrical clamp 3024 in this embodiment is configured as an adjustable structure. The cylindrical clamp 3024 has a through hole inside, in which the balance column 4 is placed. The cylindrical clamp 3024 is divided into an upper part and a lower part. The lower part includes a conical section, the upper surface of which is flat. The upper part includes a cylindrical body with a spring structure and a push block 30242. A screw 30246 and a nut 30245 are provided between the upper and lower parts, with the nut 30245 fixedly connected to the lower part of the cylindrical body. Multiple screws 30246 and nuts 30245 are provided and arranged circumferentially around the axis of the cylindrical clamp 3024; the nuts 30245 can move up and down along the axial direction of the screws 30246.

[0067] When the height of the clamped balance column 4 is large, in order to avoid the upper part from shaking or breaking due to the large riveting force during riveting, the nut 30245 is moved upward along the axis of the screw 30246. The nut 30245 drives the cylindrical body and the spring of the push block 30242 to move upward, so that the spring of the push block 30242 always clamps the upper part of the balance column 4, and the balance column 4 will not shake, thus forming a stable support during riveting.

[0068] Compared with the prior art, this embodiment divides the cylindrical clamp 3024 into upper and lower parts, with a screw 30246 and a nut 30245 provided between the two parts. The nut 30245 is fixed to the upper part and can move up and down along the screw 30246 to drive the upper push block 30242 spring for clamping the balance column 4 to move up and down, so that the upper part of the balance column 4 of different heights is clamped, thereby making the clamp adaptable to balance columns 4 of different diameters and improving the adaptability to balance columns 4 of different heights.

[0069] Example 5

[0070] This embodiment is an improvement on embodiment 2, designed to accommodate balance columns of various heights, such as... Figure 9 As shown, the cylindrical mold 3024 in this embodiment is configured with a double-layer structure of inner and outer layers, and multiple sets of positioning pin holes 30241 are provided on the sidewalls of the inner and outer layers. The multiple sets of positioning pin holes 30241 are arranged along the axial direction of the cylindrical mold 3024. Each set of positioning pin holes 30241 is evenly distributed on the sidewalls of the inner and outer layers along the circumference of the cylindrical mold 3024.

[0071] When the height of the balance column 4 is too large, and the inner and outer layers stacked together cannot stabilize the upper part of the balance column 4, the inner layer is raised to a suitable height so that the locating pins can be inserted into the locating pin holes 30241 to clamp the upper part of the balance column 4. At least one set of locating pin holes 30241 of the inner and outer layers should overlap to fix the inner layer of the cylindrical clamp 3024. Multiple sets of locating pins are inserted from top to bottom along the axis of the balance column 4 to fix the balance column 4, ensuring that the balance column 4 is clamped stably and reliably and will not shake under a large riveting force.

[0072] Compared to existing technologies, the cylindrical mold 3024 in this embodiment is configured with a double-layer structure, with multiple sets of positioning pin holes 30241 on the sidewalls of both the inner and outer layers to position the balance column 4 at different heights. Furthermore, because multiple sets of positioning pins are inserted along the axis of the balance column 4 to fix it throughout its entire height, the clamping stability of the balance column 4 is ensured, improving its adaptability to different heights.

[0073] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A riveting device for riveting a balance column (4) and a balance ring of a motor, characterized in that, It includes a support unit (1), a riveting unit (2), and a clamping unit (3); The support unit (1) includes a platform (101), and a clamping groove (1012) is provided on the upper part of the platform (101); The clamping unit (3) includes a replaceable clamp (301); the replaceable clamp (301) is disposed in the clamping groove (1012); The clamp unit (3) further includes a V-shaped clamp assembly (302), which includes a V-shaped clamp (3023) and a cylindrical clamp (3024) located at the center of the V-shaped clamp (3023).

2. The riveting device according to claim 1, characterized in that, The V-shaped clamp assembly (302) further includes a vertical plate (3021) and a spring (3022); the V-shaped clamp (3023) includes a V-shaped edge, and the vertical plate (3021) is fixed to one side of the V-shaped edge of the V-shaped clamp (3023).

3. The riveting device according to claim 2, characterized in that, The spring (3022) is disposed between the upright plate (3021) and the V-shaped edge; the length direction of the spring (3022) is perpendicular to the V-shaped edge.

4. The riveting device according to claim 2, characterized in that, The included angle between the two V-shaped sides of the V-shaped clamp (3023) is 120°.

5. The riveting device according to claim 1, characterized in that, The cylindrical clamp (3024) has a circular groove in the middle for inserting the balance column (4).

6. The riveting device according to claim 1, characterized in that, The upper part of the cylindrical clamp (3024) is provided with a positioning pin hole (30241) around its axis in the circumferential direction.

7. The riveting device according to claim 1, characterized in that, The clamp groove (1012) is a conical groove, and the V-shaped clamp (3023) is disposed on both sides of the conical groove.

8. The riveting device according to claim 7, characterized in that, The cylindrical clamp (3024) has a tapered surface (30242) at its bottom, which can be inserted into the tapered groove for positioning the cylindrical clamp (3024) and the balance column (4).

9. The riveting device according to claim 1, characterized in that, The support unit (1) further includes a bracket (103) and a column (102); the bracket is disposed above the platform (101), and the bracket (103) is used to support the riveting unit (2); the column (102) is disposed between the bracket (103) and the platform (101).

10. The riveting device according to claim 1, characterized in that, The replaceable clamp (301) has a central circular hole; there are multiple replaceable clamps (301), and the central circular holes of the multiple replaceable clamps (301) have different diameters to accommodate balance columns (4) of different diameters.

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