Horizontal positioning mechanism for head

Abstract

The head horizontal positioning mechanism is provided with a positioning unit 2, a rotating mechanism 3 and an elastic lifting mechanism 4. The elastic lifting mechanism 4 can not only bear the whole weight of the head body and stably lift the head body, but also can have a certain adjusting range in the horizontal direction by using the function of elastic lifting in the vertical direction. In combination with the downward pulling function of the positioning unit 2, the height of the outer edge of the head body can be accurately adjusted, so that the head body can be accurately adjusted to the horizontal state. Meanwhile, under the cooperation of the rotating mechanism 3, a plurality of positioning units 2 can be organically connected, and are synchronously pulled down or lifted, so that the outer edge of the head body can be quickly and accurately pulled to the same height, the head body can be efficiently made horizontal, the accurate cooperation between the head body and the head connecting flange is ensured, and sufficient preparation is made for the subsequent high-quality welding.

Description

Technical Field

[0001] The invention relates to the technical field of welding, in particular to a head horizontal positioning mechanism. Background Art

[0002] When processing the head on the cement mixing tank, the annular head connection flange needs to be welded together with the head body so that the head connection flange can be connected to the driving motor of the cement mixing tank during installation. During actual processing, the head connection flange needs to be fixed horizontally first, with its stopper 710 facing upwards; then the head body, which is approximately disc-shaped, needs to be hoisted above the head connection flange, so that the head installation port 720 of the head body and the stopper 710 are vertically plugged in and matched, and the opening of the head body needs to be kept facing upwards so that other components such as reinforcing ribs can be welded on the inner wall of the head body; after the two are matched, an annular gap is formed between them; then, they are spot welded and fixed at the annular gap; finally, the two are welded together. Since the driving motor needs to be installed on the head connection flange, if the flatness difference is large, the stability of the tank body of the mixing tank will be poor when it rotates. Therefore, during installation, the head connection flange and the head body should be kept horizontal and consistent.

[0003] However, in actual production, it is found that since the diameter of the head body is usually between 1500 and 2000 mm, its weight and horizontal area are both large, and the diameter of the head installation opening 720 and the stopper 710 are similar, the diameter and circumference of the annular gap formed by the head installation opening 720 and the stopper 710 are also large. Figure 21 and Figure 22 As shown, the head body is prone to tilt relative to the horizontal plane where the head connection flange is located, and the two are not consistent in level, that is, the flatness of the two is not good. Once the head body tilts relative to the head connection flange, the annular gap between the head installation port 720 and the stopper 710 will be uneven, as shown in FIG. Figure 22 As shown in the figure, the gap is large at some positions and small at some positions. In such a matching situation, the welding quality between the two will be seriously reduced, making it difficult for the strength and sealing of the head to meet the design requirements.

[0004] However, due to the large size and weight of the head body, it had to be hoisted using lifting equipment, which was difficult to maintain level during the hoisting process. After assembly, manual adjustments were required, often requiring separation and reassembly, often repeatedly. This made the assembly of the head body and the connecting flange difficult, time-consuming, and labor-intensive, resulting in a low assembly pass rate. Summary of the Invention

[0005] In order to solve the above problems, the purpose of the present invention is to provide a head horizontal positioning mechanism, which does not require manual adjustment and coordination with lifting equipment, and can efficiently and accurately adjust the position of the head body so that the height of the outer edge of the head body is equal, thereby achieving the effect of keeping the head body and the head connecting flange horizontal and consistent, making the annular gap between the two uniform, thereby improving the accuracy and strength of the head welding.

[0006] The technical solution adopted by the present invention to solve the technical problem is: a head horizontal positioning mechanism, which has a fixed base, characterized in that: a rotating mechanism is installed on the top of the fixed base, three positioning units are arranged on the periphery of the rotating mechanism, the rotating mechanism is composed of a rotating sleeve and a support cylinder, the support cylinder is connected to the fixed base, the rotating sleeve is movably installed on the periphery of the support cylinder, and three rotating sleeve shafts are radially arranged on the periphery of the rotating sleeve; a three-jaw chuck is installed on the fixed base, and the three-jaw chuck is located in the support cylinder;

[0007] The cam is connected to the sliding seat of the first support rail and the sliding seat of the second support rail, and the cam is connected to the sliding seat of the first support rail by the spring. The rocker arm is provided with a rocker arm shaft in the radial direction, and the rocker arm shaft is movably mounted on the rocker arm shaft, and a connecting rod joint is movably mounted on the rotating sleeve shaft, one end of the second connecting rod is hinged to the second rocker arm through the first hinge shaft, and the other end of the second connecting rod is hinged to the connecting rod joint through the second hinge shaft, the first hinge shaft is perpendicular to the rocker arm shaft, and the second hinge shaft is perpendicular to the rotating sleeve shaft;

[0008] Three elastic supporting mechanisms are installed on the fixed base, and the elastic supporting mechanisms are evenly distributed on the periphery of the rotating mechanism.

[0009] A support cylinder cover is provided at the bottom of the support cylinder, and an installation groove is provided on the support cylinder cover. The number of the installation grooves is the same as the number of the radial support seats, and the inner end of the radial support seat cooperates with the installation groove.

[0010] A supporting tube annular groove is provided on the outer periphery of the middle portion of the supporting tube.

[0011] The first spline shaft bearing assembly is installed in the second support seat; the first spline shaft bearing assembly is composed of a first pressure cover, a first bearing, and a compression sleeve. A second mounting hole is opened on the second support seat, a second limiting ring is provided in the second mounting hole, at least one first bearing is installed in the second mounting hole, the outer ring of the first bearing cooperates with the second limiting ring, the inner ring of the first bearing cooperates with the spline shaft, the first pressure cover is installed on the inner side of the second mounting hole, the flange of the first pressure cover is connected to the second support seat, and the inner end of the first pressure cover cooperates with the outer ring of the first bearing.

[0012] A compression sleeve is fixedly installed on the outer periphery of the spline shaft, the compression sleeve cooperates with the inner ring of the first bearing, and the compression sleeve and the first pressure cover are located on both sides of the first bearing.

[0013] The second spline shaft bearing assembly is installed in the first support seat, and the second spline shaft bearing assembly consists of a second pressure cover, a third pressure cover and a second bearing. A first mounting hole is opened on the first support seat, a first limiting ring is provided in the first mounting hole, and the second bearing is installed in the first mounting hole. The outer ring of the second bearing cooperates with the first limiting ring, and a limiting convex edge is provided in the middle of the spline sleeve. The second pressure cover is installed at the outer end of the spline sleeve, and the second pressure cover and the limiting convex edge form an annular groove, which cooperates with the inner ring of the second bearing; the third pressure cover is installed at the outer end of the first support seat, and the third pressure cover cooperates with the outer ring of the second bearing. The second pressure cover is located inside the third pressure cover.

[0014] The elastic lifting mechanism is composed of a support sleeve, a spring, a guide shaft, a universal ball and a guide shaft limit cover. The spring and the guide shaft are installed in the support sleeve from bottom to top, the guide shaft limit cover is installed on the upper end of the support sleeve, and the universal ball is installed outside the upper end of the guide shaft passing through the guide shaft limit cover.

[0015] The periphery of the fixed base is movably installed with a rotating frame assembly, which is composed of a rotating sleeve and a guide plate. The three guide plates form a triangular frame, and the rotating sleeve is the inscribed circle of the triangular frame. A strip guide hole is provided on each guide plate, and a directional column is installed in each strip guide hole. The directional column is provided with a connecting piece, and each connecting piece is fixedly connected to the bottom of the slide.

[0016] The included angle between the first hinge axis and the second hinge axis is greater than degrees and less than degrees.

[0017] A rotating sleeve pressing plate for limiting the position of the rotating sleeve is installed on the upper part of the supporting cylinder.

[0018] The positive effect of the present invention is that the head horizontal positioning mechanism is provided with a positioning unit 2, a rotating mechanism 3 and an elastic lifting mechanism 4. The elastic lifting mechanism 4 can bear the entire weight of the head body and lift the head body steadily, and can also use its own elastic lifting function in the vertical direction to allow the head body to have a certain adjustment range in the horizontal direction. Combined with the pull-down function of the positioning unit 2, the height of the outer edge of the head body can be accurately adjusted, so that the head body can be accurately adjusted to a horizontal state; at the same time, with the cooperation of the rotating mechanism 3, multiple positioning units 2 can be organically connected together, and pulled down or raised synchronously, so that the outer edges of the head body can be quickly and accurately pulled to the same height at all places, so that the head body can be efficiently leveled, to ensure that the head body and the head connection flange are accurately matched, and fully prepared for subsequent high-quality welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the head horizontal positioning mechanism of the present invention;

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of the head horizontal positioning mechanism of the present invention from another angle, showing the positioning state of the head and the head connecting flange;

[0021] Figure 3 is a front view of the positioning unit;

[0022] Figure 4 yes Figure 3 Left view of;

[0023] Figure 5 yes Figure 3 Schematic diagram of the three-dimensional structure;

[0024] Figure 6 yes Figure 3 Schematic diagram of the three-dimensional structure from another angle;

[0025] Figure 7 2 is a schematic diagram of the three-dimensional structure of the second connecting rod;

[0026] Figure 8 It is a schematic diagram of the main structure of the transmission mechanism;

[0027] Figure 9 yes Figure 8 AA cross-sectional structural diagram;

[0028] Figure 10 yes Figure 8 Schematic diagram of the three-dimensional structure;

[0029] Figure 11 yes Figure 8 Schematic diagram of the right view structure;

[0030] Figure 12 It is a three-dimensional structural diagram of a three-jaw chuck;

[0031] Figure 13 It is a schematic diagram of the three-dimensional structure of the rotating mechanism;

[0032] Figure 14 It is a schematic cross-sectional structural diagram of the elastic lifting mechanism;

[0033] Figure 15 This is a schematic diagram of the main structure of the rotating frame installed on the fixed base 1;

[0034] Figure 16 yes Figure 15 Schematic diagram of the three-dimensional structure;

[0035] Figure 17 1 is a schematic diagram of the three-dimensional structure of the rotating frame;

[0036] Figure 18 It is a three-dimensional structural diagram of the head body and the head connecting flange ready for cooperation;

[0037] Figure 19 It is a cross-sectional view after the head body and the head connecting flange are accurately matched;

[0038] Figure 20 yes Figure 19 Schematic diagram of the partially enlarged structure of II;

[0039] Figure 21 It is a cross-sectional view of the head body after being tilted and matched with the head connecting flange;

[0040] Figure 22 yes Figure 21 Schematic diagram of the partially enlarged structure of III. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] 1Fixed base

[0043] 2 positioning units

[0044] 20 radial support seat 200 first linear guide rail

[0045] 21 Slide mechanism 210 Slide 211 Radial cylinder 212 Vertical cylinder 213 Vertical slide 214 Vertical support 215 Press block 216 Second linear guide 217 Orientation column 218 Connector

[0046] 22 Transmission mechanism 220 Spline shaft 2200 First swing arm 2201 Spline sleeve 2202 Limiting protrusion 2203 Screw hole 2204 Positioning cover 221 First connecting rod 222 First support seat 2220 First mounting hole 2221 First limiting ring 223 Second support seat 2230 Second mounting hole 2231 Second limiting ring 224 First hinge axis 225 Second connecting rod 226 Connecting rod joint 227 Second swing arm 228 Second hinge axis 229 Rocker arm 2290 Rocker arm shaft

[0047] 23 First spline shaft bearing assembly 230 First gland 231 First bearing 232 Press sleeve

[0048] 24 Second spline shaft bearing assembly 240 Second gland 241 Third gland 242 Second bearing

[0049] 3 Rotating mechanism 30 Rotating sleeve 300 Rotating sleeve shaft 31 Support cylinder 310 Support cylinder cover 311 Mounting groove 312 Support cylinder annular groove 32 Rotating sleeve pressure plate

[0050] 4 Elastic lifting mechanism 40 Support sleeve 41 Spring 42 Guide shaft 43 Universal ball 44 Guide shaft limit cover

[0051] 5 three-jaw chuck

[0052] 6 Rotating frame assembly 60 Strip guide hole 61 Rotating sleeve 62 Guide plate 63 Positioning sleeve

[0053] 7 Head 71 Head connecting flange 710 Stop 72 Head body 720 Head installation port 721 Outer edge Implementation Method

[0054] The head horizontal positioning mechanism of the present invention includes a fixed base 1. Figure 1 As shown, a rotating mechanism 3 is installed on the top of the fixed base 1. Three positioning units 2 are set on the periphery of the rotating mechanism 3. The three positioning units 2 are all arranged radially and can be evenly distributed on the periphery of the rotating mechanism 3 in a circular shape. Figure 13 As shown, the rotating mechanism 3 can be composed of a rotating sleeve 30, a supporting cylinder 31 and a rotating sleeve pressure plate 32. The bottom of the supporting cylinder 31 is fixedly connected to the fixed base 1. The rotating sleeve 30 is movably mounted on the outer periphery of the supporting cylinder 31. The rotating sleeve 30 can rotate relative to the supporting cylinder 31, and there can be lubrication between the two. Three rotating sleeve shafts 300 are radially provided on the outer periphery of the rotating sleeve 30. Figure 1As shown, a three-jaw chuck 5 is mounted on the fixed base 1 and positioned within the support cylinder 31. The three jaws of the three-jaw chuck 5 are secured horizontally within the annular head connection flange 71. The number of positioning units 2 can be four or five, depending on the size of the head to be machined and customer requirements. The three-jaw chuck 5 is a self-centering three-jaw chuck.

[0055] This application uses a vertical cylinder 212 as the power device to adjust the head body 72 to a horizontal position and provide vertical pressure for the head body 72 and the head connection flange 71. This is because the cylinder has strong power, is low-priced, has strong adaptability to environmental conditions, has a long service life, and is easy to operate. This helps reduce manufacturing costs and extend service life, making it suitable for continuous production in large-scale production systems. However, the movement accuracy of the cylinder is not high, and its stroke is difficult to accurately control. Therefore, it is generally not considered as a power device for performing precise movement in the field. To this end, this application integrates the rotating mechanism 3 with the positioning unit 2. On the one hand, it allows the vertical cylinder 212 to fully utilize its own advantages. On the other hand, the rotating mechanism 3 coordinates the various positioning units 2, ensuring that the movement of all vertical slides 213 is highly consistent, thereby providing sufficient power and ensuring sufficient precision. At the same time, the rotating mechanism 3 is located within the multiple positioning units 2, close to the three-jaw chuck 5, and is not easily affected by external interference. This makes the structure of the head horizontal positioning mechanism more compact, the operation more stable, and the service life longer.

[0056] like Figure 5 As shown, each positioning unit 2 is composed of a radial support seat 20, a slide mechanism 21 and a transmission mechanism 22. One end of the radial support seat 20 is fixedly connected to the fixed base 1. At least one first linear guide 200 is installed in the radial support seat 20. The slide rail of the first linear guide 200 is connected to the radial support seat 20, and the slide mechanism 21 is installed on the slider of the first linear guide 200. The slide mechanism 21 is composed of a slide 210, a radial cylinder 211, a vertical cylinder 212, a vertical sliding plate 213, a vertical support 214, a pressure block 215 and a second linear guide 216. The slide 210 is connected to the slider of the first linear guide 200, and the radial cylinder 211 is installed on the side of the radial support seat 20. The piston rod of the radial cylinder 211 is connected to the slide 210, and can drive the slide 210 to move back and forth in a radial direction. The vertical support 214 and the vertical cylinder 212 are installed on the slide 210. A second linear guide 216 is mounted vertically within the vertical support 214. The slide rail of the second linear guide 216 is connected to the vertical support 214, and a vertical slide 213 is mounted on the slider of the second linear guide 216. A pressure block 215 is provided on the inner side of the vertical slide 213. The piston rod of the vertical cylinder 212 is connected to the vertical slide 213, and the vertical cylinder 212 can drive the vertical slide 213 to move vertically.

[0057] like Figure 6 As shown, the transmission mechanism 22 is installed on the radial support seat 20. The transmission mechanism 22 is composed of a spline shaft 220, a first connecting rod 221, a first support seat 222 and a second support seat 223. Figure 8 and Figure 9 As shown, a spline sleeve 2201 is installed on the spline shaft 220, and a first support seat 222 is installed on the outer periphery of the spline sleeve 2201. The spline sleeve 2201 can only rotate relative to the first support seat 222, so that the spline shaft 220 can both rotate relative to the first support seat 222 and move axially relative to the first support seat 222. A second support seat 223 is installed on the outer end of the spline shaft 220, and the spline shaft 220 can only rotate relative to the second support seat 223. Figure 6 As shown, the second support seat 223 is fixedly connected to the slide 210, and the slide 210 can drive the spline shaft 220 to move linearly through the second support seat 223. The first support seat 222 is fixedly connected to the radial support seat 20. The outer end of the spline shaft 220 is fixedly installed with the first swing arm 2200, and the first swing arm 2200 and the spline shaft 220 can rotate synchronously. The first swing arm 2200 is hinged to one end of the first connecting rod 221, and the other end of the first connecting rod 221 is hinged to the vertical sliding plate 213. During the lifting process of the vertical sliding plate 213, the first swing arm 2200 can be driven to swing by the first connecting rod 221, thereby driving the spline shaft 220 to rotate. As shown Figure 9 As shown, the rocker arm 229 is fixedly mounted on the spline sleeve 2201, so the spline shaft 220 can both move axially relative to the rocker arm 229 and drive the rocker arm 229 to rotate. Figure 8 As shown, a rocker arm 229 is radially provided with a rocker shaft 2290. A second rocker arm 227 is movably mounted on the rocker shaft 2290, and the second rocker arm 227 can rotate about the rocker shaft 2290. A connecting rod joint 226 is movably mounted on the rotating sleeve shaft 300, and the connecting rod joint 226 can rotate about the rotating sleeve shaft 300. One end of the second connecting rod 225 is hinged to the second rocker arm 227 via a first hinge shaft 224, and the other end of the second connecting rod 225 is hinged to the connecting rod joint 226 via a second hinge shaft 228. The first hinge shaft 224 is perpendicular to the rocker shaft 2290, and the second hinge shaft 228 is perpendicular to the rotating sleeve shaft 300. When the vertical sliding plate 213 is raised or lowered, the spline shaft 220 can be driven to rotate by the first connecting rod 221, and the spline shaft 220 can drive the rotating sleeve 30 to rotate through the second connecting rod 225. The rotating sleeve 30 makes the rotation angles of all spline shafts 220 consistent, thereby ensuring that the lifting and lowering amplitudes of the vertical sliding plate 213 are consistent, so as to adjust the head body 72 to a horizontal position and assemble it into one with the head connecting flange 71.

[0058] like Figure 2As shown, three elastic lifting mechanisms 4 are mounted on the fixed base 1 and are evenly distributed around the periphery of the rotating mechanism 3. After the head body 72 is hoisted above the three-jaw chuck 5, the head body 72 can be placed on the elastic lifting mechanisms 4, and the three elastic lifting mechanisms 4 will lift the head body 72. Because the elastic lifting mechanisms 4 can be adjusted in height along with the position of the head body 72, they provide ample adjustment space for the positioning unit 2 to adjust the head body 72. The elastic lifting mechanisms 4 can be existing length-adjustable and automatically extendable mechanisms.

[0059] Working principle:

[0060] First, place the head flange 71 horizontally and clamp it with the three-jaw chuck 5. Then, hoist the head body 72 above the head flange 71. Slowly lower the head body 72 so that it is supported by the three elastic support mechanisms 4. At the same time, the stopper 710 and the head mounting opening 720 are in contact. Then, mate the head flange 71 and the head body 72, keeping them aligned horizontally. The specific mate steps are as follows:

[0061] All radial cylinders 211 simultaneously drive the slide 210 to move horizontally, so that the vertical sliding plate 213 presses the outer edge 721 of the head body 72 from the outside, so that the pressing block 215 is located above the outer edge 721;

[0062] At the same time, the vertical cylinder 212 on each positioning unit 2 is activated. The vertical cylinder 212 pulls the vertical slide 213 downward, and at the same time, the vertical slide 213 drives the pressure block 215 downward, thereby pulling the outer edge 721 downward. The elastic lifting mechanism 4 allows the head body 72 to move downward to a certain extent. As the vertical slide 213 moves downward, it drives the first swing arm 2200 to swing through the first connecting rod 221. The first swing arm 2200 drives the spline shaft 220 to rotate. The spline shaft 220 drives the rotating sleeve 30 to rotate relative to the support cylinder 31 in sequence through the rocker arm 229, the second swing arm 227, the second connecting rod 225, the connecting rod joint 226 and the rotating sleeve shaft 300. The rotating sleeve 30 and the supporting cylinder 31 rotate in coordination to force the three vertical sliding plates 213 to move downward by equal distances, so that the outer edges 721 of the head body 72 are kept at the same height. This ensures that the head body 72 remains horizontal and the head body 72 and the head connecting flange 71 are connected as shown in FIG. Figure 19 and Figure 20 During the assembly process, each elastic support mechanism 4 can adjust its height by its own elastic force in coordination with the downward pull of the positioning unit 2 and the specific position of the head body 72. This allows the head body 72 to freely adjust its angle until it reaches a horizontal position under the downward pull of the positioning unit 2 during the entire assembly process. This ensures that the head body and the head connection flange are tightly pressed together, ensuring the flatness of the head and the lower connection flange, making assembly quick and accurate, and saving time and effort.

[0063] like Figure 13 As shown, a rotating sleeve pressure plate 32 can be mounted on the upper portion of the support cylinder 31 to limit the position of the rotating sleeve 30. A support cylinder cover 310 is provided at the bottom of the support cylinder 31. The support cylinder cover 310 is fixedly connected to the fixed base 1. The support cylinder cover 310 defines mounting slots 311, the number of which is the same as the number of radial support seats 20. The inner ends of the radial support seats 20 engage with the mounting slots 311. The support cylinder cover 310 and the mounting groove 311 play a positioning role, which is conducive to accurately connecting the support cylinder 31 and the radial support seat 20 as a whole. At the same time, it can improve the assembly accuracy and efficiency between the rotating sleeve 30 and the transmission mechanism 22, ensuring that the vertical sliding plate 213 is synchronously raised and lowered with higher accuracy under the action of the rotating sleeve 30, so as to prevent the head body 72 from being offset horizontally relative to the head connection flange 71, that is, the head body 72 and the head connection flange 71 are kept horizontal after vertical matching, so that the matching clearance between the head body 72 and the head connection flange 71 is consistent everywhere, which is conducive to accurately welding the two together. In combination with the rotating sleeve pressure plate 32, it can further limit the movement trajectory of the rotating sleeve 30, ensure its stable operation, and facilitate the disassembly and maintenance of the rotating sleeve 30 to ensure its normal operation, thereby improving the horizontal installation accuracy and speed of the head body 72.

[0064] like Figure 8 As shown, a supporting tube annular groove 312 is opened on the outer periphery of the middle part of the supporting tube 31. The supporting tube annular groove 312 can reduce the contact area between the rotating sleeve 30 and the supporting tube 31 and reduce the friction. At the same time, rollers can also be installed in the supporting tube annular groove 312 to make the rotation between the rotating sleeve 30 and the supporting tube 31 smoother, so as to further improve the synchronization of the movement of each positioning unit 2.

[0065] like Figure 9 As shown, the first spline shaft bearing assembly 23 is installed in the second support seat 223. The first spline shaft bearing assembly 23 is composed of a first pressure cover 230, a first bearing 231, and a pressing sleeve 232. A second mounting hole 2230 is provided on the second support seat 223, and a second limiting ring 2231 is provided in the second mounting hole 2230. At least one first bearing 231 is installed in the second mounting hole 2230, and the outer ring of the first bearing 231 cooperates with the second limiting ring 2231, and the inner ring of the first bearing 231 cooperates with the spline shaft 220. The first pressure cover 230 is installed on the inner side of the second mounting hole 2230, and the flange of the first pressure cover 230 is connected to the second support seat 223, and the inner end of the first pressure cover 230 cooperates with the outer ring of the first bearing 231. The first pressure cover 230 can limit the first bearing 231 from moving in the opposite direction. Figure 9 The second limiting ring 2231 can limit the first bearing 231 to move to the left. Figure 9The first bearing 231 moves on the right side and can cooperate with the shoulder of the spline shaft 220. When the second support seat 223 moves, the second support seat 223 can drive the spline shaft 220 through the first pressure cover 230 and the first bearing 231. Figure 9 The transmission mechanism 22 can also be driven to the right by the second limiting ring 2231 and the first bearing 231. Figure 9 To further improve the accuracy of driving the spline shaft 220 to move, a compression sleeve 232 is installed on the outer periphery of the spline shaft 220. The compression sleeve 232 is located between the first bearing 231 and the first swing arm 2200. The compression sleeve 232 cooperates with the inner ring of the first bearing 231. In addition, a screw hole 2203 can be axially opened at the outer end of the spline shaft 220. Figure 3 As shown, a positioning cover 2204 is installed at the outer end, and the positioning cover 2204 is fixed to the outer end of the spline shaft 220 through bolts and screw holes 2203, so that the first bearing 231 can be restricted from moving rightward relative to the spline shaft 220 by the first swing arm 2200 and the compression sleeve 232. Figure 9 As shown, a compression sleeve 232 is fixedly installed on the outer periphery of the spline shaft 220 , and the compression sleeve 232 cooperates with the inner ring of the first bearing 231 . The compression sleeve 232 and the first pressure cover 230 are located on both sides of the first bearing 231 .

[0066] like Figure 9 As shown, the second spline shaft bearing assembly 24 is mounted within the first support seat 222. The second spline shaft bearing assembly 24 is composed of a second gland 240, a third gland 241, and a second bearing 242. A first mounting hole 2220 is defined in the first support seat 222. A first retaining ring 2221 is disposed within the first mounting hole 2220. A second bearing 242 is mounted within the first mounting hole 2220. The outer ring of the second bearing 242 engages with the first retaining ring 2221. A retaining flange 2202 is disposed in the middle of the spline sleeve 2201. A second gland 240 is mounted on the outer end of the spline sleeve 2201. The second gland 240 and the retaining flange 2202 form an annular groove that engages with the inner ring of the second bearing 242. A third gland 241 is mounted on the outer end of the first support seat 222. The third gland 241 engages with the outer ring of the second bearing 242. The second gland 240 is located within the third gland 241. This structure can further ensure that the spline shaft 220 can not only move axially relative to the first support seat 222 , but also drive the rocker arm 229 to rotate.

[0067] like Figure 14As shown, the elastic lifting mechanism 4 is composed of a support sleeve 40, a spring 41, a guide shaft 42, a universal ball 43 and a guide shaft limit cover 44. The spring 41 and the guide shaft 42 are installed in the support sleeve 40 from bottom to top. The guide shaft limit cover 44 is installed on the upper end of the support sleeve 40. The upper end of the guide shaft 42 passes through the guide shaft limit cover 44 and the universal ball 43 is installed on the outside. This structure is simple and has high strength. It can not only have sufficient supporting force to lift the head body 72, but also facilitate the adjustment of the head body 72 to a horizontal state through the up and down movement of the guide shaft 42 and the rolling friction of the universal ball 43, which can improve the accuracy of the head body 72 and the head connection flange 71.

[0068] like Figure 16 As shown, the outer periphery of the fixed base 1 is movably mounted with a rotating frame assembly 6. The rotating frame assembly 6 is composed of a rotating sleeve 61 and a guide plate 62. Figure 17 As shown, three guide plates 62 form a triangular frame, with the rotating sleeve 61 serving as the inscribed circle of the triangular frame. Each guide plate 62 defines a strip-shaped guide hole 60. Each strip-shaped guide hole 60 houses an orientation post 217, which is provided with a connector 218. Each connector 218 is fixedly connected to the bottom of the slide 210. This technical solution allows the slide mechanism 21 to synchronously move toward the three-jaw chuck 5 and outward away from the three-jaw chuck 5. This further improves the accuracy and efficiency of adjusting the head body 72, facilitating the assembly of the head body 72 and the head connection flange 71.

[0069] like Figure 7 As shown, the angle between the first hinge axis 224 and the second hinge axis 228 is greater than 0 degrees and less than 90 degrees. According to the different size ratios between the components of the head horizontal positioning mechanism, the angle can be adjusted appropriately.

[0070] The technical solutions of the present invention are not limited to the scope of the embodiments described in the present invention. The technical contents not described in detail in the present invention are all well-known technologies.

Claims

1. A head horizontal positioning mechanism having a fixed base (1) and characterized by: A rotating mechanism (3) is installed on the top of the fixed base (1), and three positioning units (2) are arranged on the outer periphery of the rotating mechanism (3). The rotating mechanism (3) is composed of a rotating sleeve (30) and a supporting cylinder (31). The supporting cylinder (31) is connected to the fixed base (1). The rotating sleeve (30) is movably installed on the outer periphery of the supporting cylinder (31), and three rotating sleeve shafts (300) are radially arranged on the outer periphery of the rotating sleeve (30). A three-jaw chuck (5) is installed on the fixed base (1), and the three-jaw chuck (5) is located in the supporting cylinder (31). Each positioning unit (2) is composed of a radial support seat (20), a slide mechanism (21) and a transmission mechanism (22), one end of the radial support seat (20) is connected to the fixed base (1), at least one first linear guide rail (200) is installed in the radial support seat (20), the slide rail of the first linear guide rail (200) is connected to the radial support seat (20), and the slide mechanism (21) is installed on the slider of the first linear guide rail (200); the slide mechanism (21) is composed of a slide (210), a radial cylinder (211), a vertical cylinder (212), a vertical sliding plate (213), a vertical support (214), a pressure block (215) and a second linear guide rail (216), and the slide rail is connected to the radial support seat (20). The platform (210) is connected to the slider of the first linear guide rail (200), a radial cylinder (211) is installed on the side of the radial support seat (20), the piston rod of the radial cylinder (211) is connected to the slide table (210), a vertical support (214) and a vertical cylinder (212) are installed on the slide table (210), a second linear guide rail (216) is vertically installed in the vertical support (214), the slide rail of the second linear guide rail (216) is connected to the vertical support (214), a vertical sliding plate (213) is installed on the slider of the second linear guide rail (216), the piston rod of the vertical cylinder (212) is connected to the vertical sliding plate (213), and a pressure block (215) is provided on the inner side of the vertical sliding plate (213);A transmission mechanism (22) is installed on the radial support seat (20). The transmission mechanism (22) is composed of a spline shaft (220), a first connecting rod (221), a first support seat (222) and a second support seat (223). A spline sleeve (2201) is installed on the spline shaft (220). The first support seat (222) is installed on the outer periphery of the spline sleeve (2201). The spline sleeve (2201) can only rotate relative to the first support seat (222), so that the spline shaft (2201) 20) can rotate relative to the first support seat (222) and can also move axially relative to the first support seat (222). The outer end of the spline shaft (220) is installed with the second support seat (223). The spline shaft (220) can only rotate relative to the second support seat (223). The second support seat (223) is connected to the slide (210). The first support seat (222) is connected to the radial support seat (20). The outer end of the spline shaft (220) is fixedly installed with the first swing arm (2 200), a first swing arm (2200) is hinged to one end of a first connecting rod (221), and the other end of the first connecting rod (221) is hinged to a vertical sliding plate (213). A rocker arm (229) is fixedly mounted on the spline sleeve (2201), and the spline shaft (220) can move axially relative to the rocker arm (229) and can drive the rocker arm (229) to rotate. A rocker arm shaft (2290) is radially provided on the rocker arm (2290), and a first swing arm shaft (2290) is movably mounted on the rocker arm shaft (2290). A second swing arm (227) is movably mounted on a connecting rod joint (226) on a rotating sleeve shaft (300); one end of the second connecting rod (225) is hinged to the second swing arm (227) via a first hinge shaft (224); the other end of the second connecting rod (225) is hinged to the connecting rod joint (226) via a second hinge shaft (228); the first hinge shaft (224) is perpendicular to the rocker arm shaft (2290), and the second hinge shaft (228) is perpendicular to the rotating sleeve shaft (300); Three elastic supporting mechanisms (4) are installed on the fixed base (1), and the elastic supporting mechanisms (4) are evenly distributed on the periphery of the rotating mechanism (3).

2. The head horizontal positioning mechanism according to claim 1, characterized in that: A support cylinder cover (310) is provided at the bottom of the support cylinder (31), and a mounting groove (311) is provided on the support cylinder cover (310). The number of the mounting grooves (311) is the same as the number of the radial support seats (20), and the inner end of the radial support seat (20) is matched with the mounting groove (311).

3. The head horizontal positioning mechanism according to claim 1, characterized in that: A supporting tube annular groove (312) is provided on the outer periphery of the middle portion of the supporting tube (31).

4. The head horizontal positioning mechanism according to claim 1, characterized in that: A first spline shaft bearing assembly (23) is installed in the second support seat (223); the first spline shaft bearing assembly (23) is composed of a first pressure cover (230), a first bearing (231), and a pressing sleeve (232); a second mounting hole (2230) is provided on the second support seat (223); a second limiting ring (2231) is provided in the second mounting hole (2230); at least one first bearing (231) is installed in the second mounting hole (2230); the outer ring of the first bearing (231) cooperates with the second limiting ring (2231); the inner ring of the first bearing (231) cooperates with the spline shaft (220); the first pressure cover (230) is installed on the inner side of the second mounting hole (2230); the flange of the first pressure cover (230) is connected to the second support seat (223); and the inner end of the first pressure cover (230) cooperates with the outer ring of the first bearing (231).

5. The head horizontal positioning mechanism according to claim 4, characterized in that: A compression sleeve (232) is fixedly mounted on the outer periphery of the spline shaft (220), the compression sleeve (232) cooperates with the inner ring of the first bearing (231), and the compression sleeve (232) and the first pressure cover (230) are located on both sides of the first bearing (231).

6. The head horizontal positioning mechanism according to claim 1, characterized in that: The second spline shaft bearing assembly (24) is installed in the first support seat (222), and the second spline shaft bearing assembly (24) is composed of a second pressure cover (240), a third pressure cover (241) and a second bearing (242). A first mounting hole (2220) is provided on the first support seat (222), a first limiting ring (2221) is provided in the first mounting hole (2220), and the second bearing (242) is installed in the first mounting hole (2220), and the outer ring of the second bearing (242) is in contact with the first limiting ring (2221). 1) Matching, a limiting convex edge (2202) is provided in the middle of the spline sleeve (2201), a second pressure cover (240) is installed on the outer end of the spline sleeve (2201), the second pressure cover (240) and the limiting convex edge (2202) form an annular groove, and the annular groove is matched with the inner ring of the second bearing (242); a third pressure cover (241) is installed on the outer end of the first support seat (222), the third pressure cover (241) is matched with the outer ring of the second bearing (242), and the second pressure cover (240) is located in the third pressure cover (241).

7. The head horizontal positioning mechanism according to claim 1, characterized in that: The elastic lifting mechanism (4) is composed of a support sleeve (40), a spring (41), a guide shaft (42), a universal ball (43) and a guide shaft limiting cover (44). The spring (41) and the guide shaft (42) are sequentially installed in the support sleeve (40) from bottom to top. The guide shaft limiting cover (44) is installed on the upper end of the support sleeve (40). The upper end of the guide shaft (42) passes through the guide shaft limiting cover (44) and is installed on the outside of the universal ball (43).

8. The head horizontal positioning mechanism according to claim 1, characterized in that: The fixed base (1) is movably mounted with a rotating frame assembly (6), the rotating frame assembly (6) consisting of a rotating sleeve (61) and a guide plate (62), the three guide plates (62) forming a triangular frame, the rotating sleeve (61) being an inscribed circle of the triangular frame, each guide plate (62) being provided with a strip guide hole (60), each strip guide hole (60) being provided with a directional column (217), the directional column (217) being provided with a connecting piece (218), each connecting piece (218) being fixedly connected to the bottom of the slide (210).

9. The head horizontal positioning mechanism according to claim 1, characterized in that: The angle between the first hinge axis (224) and the second hinge axis (228) is greater than 0 degrees and less than 90 degrees.

10. The head horizontal positioning mechanism according to claim 1, characterized in that: A rotating sleeve pressing plate (32) for limiting the position of the rotating sleeve (30) is installed on the upper portion of the supporting cylinder (31).

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