Clamping device and clamp

Abstract

The utility model relates to the technical field of welding engineering, in particular to a clamping device and a clamp, the clamping device comprises a supporting assembly and a clamping assembly, the supporting assembly comprises a core shaft, a shaft sleeve, a guide rod and a clamping driving piece, the core shaft is coaxially arranged in the shaft sleeve in a sliding mode, and the clamping assembly is arranged in the shaft sleeve. The guide rod is fixedly arranged on the shaft sleeve, the axis of the guide rod is parallel to the axis of the mandrel, the shaft sleeve can penetrate into a pipe fitting to support the pipe fitting, the clamping assembly comprises a clamping piece, the clamping piece can rotate around a first axis relative to the mandrel, and the extending direction of the first axis is perpendicular to the extending direction of the axis of the mandrel. The first axis and the axis of the guide rod are arranged in a spaced mode, one side of the clamping piece is used for making contact with the end of the guide rod, the mandrel can drive the clamping piece to be close to or away from the pipe so as to clamp or loosen the pipe in the axial direction of the pipe, automatic clamping or loosening of the pipe is achieved, manual clamping or loosening of the pipe is not needed, and the production efficiency is improved. And an operator is prevented from being scalded by high temperature when the pipe fitting is manually clamped or loosened.

Description

Technical Field

[0001] This utility model relates to the field of welding engineering technology, and in particular to a clamping device and fixture. Background Technology

[0002] When welding bicycle fittings, especially the bottom bracket and center tube assembly, the clamp needs to clamp and limit the bottom bracket along the axial direction. Current technology often uses plugs or flanges at the ends of the fittings for clamping, requiring manual disassembly and reassembly each time materials are loaded or unloaded, severely impacting production efficiency. Furthermore, after welding, the temperature around the weld or weld point is high, making manual operation susceptible to burns from the hot components. Utility Model Content

[0003] The purpose of this invention is to provide a clamping device and fixture to solve the problems of low production efficiency and easy burns caused by manual operation in the prior art.

[0004] This utility model provides a pipe welding station, including a support assembly and a clamping assembly. The support assembly includes a mandrel, a bushing, a guide rod, and a clamping drive. The mandrel is slidably coaxially disposed within the bushing. The guide rod is fixedly disposed on the bushing, and the axis of the guide rod is parallel to the axis of the mandrel. The clamping drive is used to drive the mandrel to slide within the bushing. The bushing can penetrate into the pipe to support the pipe. The clamping assembly includes a clamping member that can rotate relative to the mandrel about a first axis. The extension direction of the first axis is perpendicular to the extension direction of the axis of the mandrel. The first axis is spaced apart from the axis of the guide rod. One side of the clamping member is used to contact the end of the guide rod. The mandrel can drive the clamping member to move closer to or away from the pipe to clamp or release the pipe along its axial direction.

[0005] As a preferred technical solution for the clamping device, the clamping assembly further includes an adjusting shaft and a hinge shaft. The adjusting shaft is fixedly connected to the spindle and is coaxially arranged with the spindle. A first hinge portion is provided at the end of the adjusting shaft away from the spindle. The clamping member is provided with a second hinge portion and a reversing block. The first hinge portion and the second hinge portion are hinged through the hinge shaft. The axis of the hinge shaft is the first axis. The reversing block is used to contact the end of the guide rod and cause the clamping member to rotate around the hinge shaft in a first rotation direction.

[0006] As a preferred technical solution for the clamping device, the clamping assembly further includes a tension spring, one end of which is fixedly connected to the adjusting shaft, and the other end of which passes through the clamping member. The tension spring is used to cause the clamping member to rotate about the hinge shaft in a second rotation direction, wherein the first rotation direction is opposite to the second rotation direction.

[0007] As a preferred technical solution for the clamping device, a torsion spring is sleeved on the hinge shaft, and the two torsion spring arms respectively contact the first hinge portion and the second hinge portion. The torsion spring is used to make the clamping member rotate around the hinge shaft in a second rotation direction, wherein the first rotation direction is opposite to the second rotation direction.

[0008] As a preferred technical solution for the clamping device, the support assembly further includes an intermediate disk, which is integrally formed with the bushing. The intermediate disk is provided with a vertically connected receiving groove and a limiting hole. The bushing is provided with a through hole for receiving the guide rod. The receiving groove communicates with the through hole. A limiting block is slidably disposed in the receiving groove. The limiting block can slide in the receiving groove and limit the guide rod. A limiting bolt is slidably connected to the limiting block. The head of the limiting bolt can cooperate with the limiting hole, and the tail of the limiting bolt passes through the limiting block to restrict the sliding of the limiting block in the receiving groove.

[0009] As a preferred technical solution for the clamping device, the guide rod is provided with an annular groove, the limiting block is provided with an open end, the open end is used to cooperate with the annular groove to limit the guide rod, and a second spring is also provided between the limiting block and the limiting bolt, the two ends of the second spring respectively abut against the limiting bolt and the limiting block, and the second spring is used to make the limiting bolt cooperate with the limiting hole.

[0010] As a preferred technical solution for the clamping device, a movable sleeve is provided on the outside of the bushing. The movable sleeve can slide along the axial direction of the bushing. When the clamping member clamps the pipe, the movable sleeve abuts against the end of the pipe away from the clamping member.

[0011] As a preferred technical solution for the clamping device, the movable sleeve is provided with a connecting ear, the connecting ear is provided with a connecting limiting groove and a U-shaped groove, the intermediate plate is also provided with a first receiving hole, an operating shaft is slidably disposed in the first receiving hole, the operating shaft is provided with a large end and a small end, at least a portion of the large end is located in the first receiving hole, the portion of the large end can cooperate with the limiting groove, the small end can slide in the U-shaped groove, a first spring is provided between the large end and the bottom wall of the first receiving hole, the two ends of the first spring respectively abut against the large end and the bottom wall of the first receiving hole, and the portion of the large end is located in the first receiving hole, so as to restrict the sliding of the movable sleeve on the bushing.

[0012] As a preferred technical solution for the clamping device, the clamping drive component is a telescopic cylinder or a linear motor.

[0013] This utility model provides a clamp, including the clamping device of any of the above-described solutions.

[0014] The beneficial effects of this utility model are as follows:

[0015] This invention provides a clamping device that automatically clamps or releases pipe fittings via a clamping drive, eliminating the need for manual operation and improving production efficiency. It also prevents operators from being burned by high temperatures during manual clamping or releasing.

[0016] This utility model provides a clamp. By setting the clamping device of this utility model, there is no need for personnel to manually clamp and loosen the clamp, the loading and unloading efficiency of the clamp is higher, and it effectively avoids personnel being burned by high temperature during manual operation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the pipe welding station in an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the fixture in an embodiment of the present utility model;

[0019] Figure 3 This is a schematic diagram of the fixture with the connecting components hidden in an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the fixture without the connecting component and the lower positioning component in the embodiment of this utility model;

[0021] Figure 5 This is a schematic diagram of the lower positioning component in an embodiment of the present invention;

[0022] Figure 6 This is a cross-sectional view of the lower positioning component in an embodiment of the present invention;

[0023] Figure 7 This is a cross-sectional view of the column in an embodiment of this utility model;

[0024] Figure 8 This is a schematic diagram of the structure of the first positioning component in an embodiment of this utility model;

[0025] Figure 9 This is a cross-sectional view of the first positioning component in an embodiment of the present utility model;

[0026] Figure 10 This is a schematic diagram of the structure of the second positioning component in an embodiment of this utility model;

[0027] Figure 11 This is one of the structural schematic diagrams of the pressing component in the embodiments of this utility model;

[0028] Figure 12 This is the second structural schematic diagram of the pressing component in this embodiment of the present invention;

[0029] Figure 13 This is a schematic diagram of the structure of the support component and the clamping component in the embodiment of this utility model;

[0030] Figure 14 This is a cross-sectional view of the support component and the clamping component in an embodiment of this utility model;

[0031] Figure 15 This is a schematic diagram of the structure of the movable sleeve in an embodiment of this utility model;

[0032] Figure 16 This is a schematic diagram of the support component in an embodiment of the present utility model;

[0033] Figure 17 This is a schematic diagram of the support component without the guide rod and limiting block in an embodiment of this utility model;

[0034] Figure 18 This is a cross-sectional view of the intermediate disk and the limiting block in an embodiment of the present utility model;

[0035] Figure 19 This is one of the cross-sectional views of the clamping assembly in the embodiments of this utility model;

[0036] Figure 20 This is a second cross-sectional view of the clamping assembly in an embodiment of this utility model.

[0037] In the picture:

[0038] 10. Five-way pipe; 20. Middle pipe; 100. Workbench; 110. Foundation; 120. Rotary seat; 200. Fixture;

[0039] 1. Connecting component; 11. Base plate; 12. Adjusting plate; 121. Pin hole; 122. First adjusting hole;

[0040] 2. Column; 21. Body; 22. First slide rail; 23. Second slide rail; 24. Third slide rail;

[0041] 3. Support assembly; 31. Clamping drive component; 311. Mandrel; 32. Mounting plate; 321. Second adjustment hole; 33. Fixing block; 34. Intermediate plate; 341. Extension block; 342. Receiving groove; 343. Limiting hole; 344. First receiving hole; 351. Operating shaft; 352. First spring; 361. Limiting block; 3611. Open end; 3612. Second receiving hole; 362. Limiting bolt; 363. Second spring; 37. Bushing; 371. Through hole; 38. Guide rod; 381. Annular groove; 39. Movable sleeve; 391. Connecting ear; 3911. Limiting groove; 3912. U-shaped groove;

[0042] 4. Clamping assembly; 41. Adjusting shaft; 411. First screw hole; 412. Second screw hole; 413. Third receiving hole; 414. First hinge part; 42. Clamping member; 421. Second hinge part; 422. Reversing block; 423. Mating hole; 43. Tension spring; 44. Hinge shaft;

[0043] 5. Lower positioning assembly; 51. Adjusting arm; 52. Positioning shaft; 53. Positioning pin; 54. Third spring;

[0044] 6. First positioning component; 61. First frame; 62. First slider; 63. Second slider; 64. First positioning block; 65. Extension arm; 66. Mounting base; 67. Quick clamp;

[0045] 7. Second positioning component; 71. Second frame; 72. Fourth slide rail; 73. Third slider; 74. Extension arm; 75. Second positioning block;

[0046] 8. Pressing assembly; 81. Third frame; 82. Pressing drive; 83. Drive plate; 84. Fourth slider; 85. Fifth slider; 86. Pressing head; 87. Pressing shaft; 871. Positioning protrusion. Detailed Implementation

[0047] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0048] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Moreover, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0049] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0050] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0051] like Figures 1-20As shown, this utility model provides a pipe welding station, including a welding robot capable of welding along a preset trajectory. The structure of the welding robot and the related methods for enabling the welding robot to weld along the preset trajectory are existing technologies in the field and will not be described in detail here. The pipe welding station also includes a worktable 100, on which a base 110 and a rotary seat 120 are spaced apart. The base 110 is used to mount the welding robot, thus the relative positional relationship between the robot and the rotary seat 120 is determined and remains unchanged. The rotary seat 120 is provided with multiple clamps 200, which can rotate relative to the worktable 100 so that at least one clamp 200 faces the welding robot. This allows for simultaneous loading and unloading of materials by the other clamps 200 while the welding robot is welding, improving production efficiency. At the same time, the relative positional relationship between the welding robot and the clamps 200 remains unchanged, ultimately achieving high quality and precision of the welded finished parts, with high consistency in quality and precision. The clamp 200 is equipped with a connecting assembly 1, a column 2, a pressing assembly 8, a clamping device, and a positioning device. The connecting assembly 1 is fixedly connected to the rotary seat 120 and has an adjusting plate 12, which is rotatably mounted at the lower end of the column 2, which extends vertically. The pressing assembly 8 and the clamping device are both mounted on the column 2. The clamping device supports the pipe to be welded, and the pressing assembly 8 restricts the movement of the pipe to be welded relative to the column 2. The positioning device is slidably connected to the column 2 and has a detachable positioning element with a positioning surface that matches the pipe to be welded. The positioning element is used to position the pipe to be welded. In this embodiment, the pipes to be welded are a five-way pipe 10 and a middle pipe 20. The axis of the five-way pipe 10 is perpendicular to that of the middle pipe 20, and the five-way pipe 10 is welded to the lower end of the middle pipe 20. The clamping device supports the bottom bracket 10, the pressing component 8 presses down on the middle pipe 20 and the bottom bracket 10, and the positioning device positions the bottom bracket 10 and the middle pipe 20 to prevent misalignment of the lap joint of the bottom bracket 10 and the middle pipe 20, thus ensuring welding quality. In this embodiment, the clamp 200 is in a vertical position on the rotary seat 120, so that the state of the pipe fitting to be welded during the welding process is consistent with its posture during use, thereby improving the accuracy of the finished product after welding. At the same time, using a robot to replace manual welding improves both welding quality and accuracy, and enhances stability.

[0052] Specifically, please refer to Figures 1-2As shown, the connecting assembly 1 also includes a base plate 11, which is fixedly connected to the rotary seat 120 of the workbench 100. The base plate 11 is perpendicular to and fixedly connected to the adjusting plate 12. The adjusting plate 12 is connected to the column 2 via the fixing block 33 of the supporting assembly 3. The column 2 is fixedly connected to the fixing block 33. The adjusting plate 12 is provided with a pin hole 121 and a first adjusting hole 122. The first adjusting hole 122 is an arc-shaped hole, allowing the adjusting plate 12 to rotate relative to the fixing block 33 around the axis of the pin hole 121. Fasteners pass through the first adjusting hole 122 to fix the adjusting plate 12 to the fixing block 33. Because the base plate 11 is fixedly connected to the rotary seat 120, the angle between the column 2 and the vertical direction is changed by the rotation of the adjusting plate 12 relative to the fixing block 33, so that the posture of the bottom bracket 10 and the middle tube 20 on the clamp 200 is consistent with the posture when mounted on the bicycle.

[0053] Furthermore, such as Figures 3-4 and combined Figures 7-12 As shown, the column 2 includes a body 21 and a first slide rail 22, a second slide rail 23, and a third slide rail 24 arranged along its length. Specifically, the first slide rail 22, the second slide rail 23, and the third slide rail 24 are fixedly connected to the body 21 of the column 2. The second slide rail 23 and the third slide rail 24 are located on both sides of the body 21 of the column 2, and the first slide rail 22 is arranged adjacent to the second slide rail 23 and the third slide rail 24. The body 21 of the column 2 has a rectangular strip structure, with three sides corresponding to the first slide rail 22, the second slide rail 23, and the third slide rail 24, and the other side corresponding to the central tube 20.

[0054] The length directions of the first slide rail 22, the second slide rail 23, and the third slide rail 24 are consistent with the length direction of the column 2. Specifically, the positioning device includes a first positioning component 6, a second positioning component 7, and a lower positioning component 5, and the corresponding positioning elements include a first positioning block 64 of the first positioning component 6 and a second positioning block 75 of the second positioning component 7. Please refer to... Figures 8-9As shown, multiple first positioning components 6 are provided, distributed at intervals along the length of the column 2. Each first positioning component 6 includes a first frame 61, with a first slider 62 and a second slider 63 fixedly connected inside the first frame 61. The first slider 62 and the second slider 63 are slidably connected to the second slide rail 23 and the third slide rail 24, respectively. Locking screws are correspondingly provided on the first positioning component 6. When the first positioning component 6 slides into position, the locking screws lock the first slider 62 and the second slider 63 onto the second slide rail 23 and the third slide rail 24, respectively. A first positioning block 64 is detachably connected to the frame. The first positioning block 64 has a positioning surface that matches the pipe to be welded. In this embodiment, the first positioning block 64 is used to position the central pipe 20, i.e., the first positioning block 64 has a positioning surface that matches the central pipe 20. The first frame 61 has a U-shaped structure. The first slider 62 and the second slider 63 are located on the two inner sidewalls of the first frame 61. The first positioning block 64 is fixedly connected to the side of the first frame 61 facing away from the U-shaped opening to cooperate with the central pipe 20 and perform positioning. When switching between different specifications of the middle tube 20, simply disassemble and replace the corresponding first positioning block 64, thereby expanding the applicable scenarios of the fixture 200. Additionally, please refer to... Figure 3 and combined Figure 8 As shown, the first positioning component 6 may also be provided with an extension arm 65, a mounting base 66, and a quick clamp 67. The extension arm 65 is fixedly connected to the first frame 61 and extends upward or downward along the length direction of the column 2. The mounting base 66 is fixedly connected to the end of the extension arm 65 away from the first frame 61. The quick clamp 67 is mounted on the mounting base 66. The quick clamp 67 is used to press the middle tube 20 onto the first positioning block 64, thereby preventing the middle tube 20 from coming off the first positioning block 64 radially and ensuring positioning accuracy.

[0055] Please refer to Figure 10As shown, the second positioning component 7 is located below the first positioning component 6. The second positioning component 7 includes a second frame 71 and a third slider 73. The second frame 71 is also U-shaped, and a fourth slide rail 72 is fixedly connected inside the second frame 71. One end of the third slider 73 is slidably connected to the fourth slide rail 72, and the other end of the third slider 73 is slidably connected to the first slide rail 22. The third slider 73 and the first slide rail 22 are locked together by locking screws. The extension direction of the fourth slide rail 72 is perpendicular to the extension direction of the column 2, that is, the sliding direction of the third slider 73 on the first slide rail 22 is perpendicular to the sliding direction of the third slider 73 on the fourth slide rail 72. The second positioning component 7 also includes an extension arm 74, and a second positioning block 75 is fixedly connected to the second frame 71 through the extension arm 74. The second positioning block 75 is used to fit against the pipe to be welded. In this embodiment, the second positioning block 75 is used to position the middle tube 20, and the mating position of the second positioning block 75 and the middle tube 20 is located near the lap joint of the middle tube 20 and the five-way pipe 10. Therefore, an extension arm 65 is provided to fix the second positioning block 75 to the second frame 71, providing movement space for the welding robot and avoiding interference. By setting the fourth slide rail 72 to slide in a direction perpendicular to the column 2, the second frame 71 can slide, so that the second positioning block 75 can be used for middle tubes 20 of different thicknesses. Adjusting bolts (not shown in the figure) are threaded to both ends of the second frame 71. The two adjusting bolts are arranged opposite each other and abut against the third slider 73. When adjusting the second frame 71 to slide in a direction perpendicular to the column 2, it is only necessary to loosen one adjusting bolt and simultaneously tighten the other adjusting bolt to change the position of the second frame 71 and achieve locking. By setting the second positioning component 7 to position the lap joint of the middle tube 20 and the five-way pipe 10, the accuracy of the finished part after welding is further guaranteed.

[0056] like Figure 3 , Figure 5 and Figure 6As shown, the lower positioning component 5 includes an adjusting arm 51, a positioning shaft 52, and a positioning pin 53. The adjusting arm 51 is rotatably connected to the lower end of the column 2, the positioning shaft 52 is fixedly connected to the adjusting arm 51, and the positioning pin 53 is mounted on the positioning shaft 52. The positioning pin 53 is used to cooperate with the positioning hole of the pipe to be welded. In this embodiment, the positioning pin 53 is used to cooperate with the positioning hole on the five-way pipe 10. The positioning pin 53 extends radially along the positioning shaft 52, and the positioning shaft 52 is provided with a corresponding groove for accommodating the positioning pin 53. A third spring 54 is also provided between the positioning pin 53 and the positioning shaft 52. The two ends of the third spring 54 abut against the positioning pin 53 and the positioning shaft 52 respectively, thereby enabling the positioning pin 53 to extend and retract radially along the positioning shaft 52 to position the five-way pipe 10 during the loading process. The adjusting arm 51 is connected to the column 2 through the mounting plate 32 of the support component 3. The mounting plate 32 is fixedly connected to the fixing block 33, and the fixing block 33 is fixedly connected to the body 21 of the column 2. The mounting plate 32 is provided with an arc-shaped second adjustment hole 321. The fastener passes through the second adjustment hole 321 and is fixedly connected to the adjustment arm 51, so that the adjustment arm 51 can rotate relative to the mounting plate 32. The axis of rotation of the adjustment arm 51 relative to the mounting plate 32 is the axis of the bottom bracket 10. Thus, while the positioning pin 53 can rotate circumferentially along the bottom bracket 10, the axis of the positioning pin 53 is always along the radial direction of the bottom bracket 10, so as to achieve cooperation with the positioning holes at different positions of the bottom bracket 10.

[0057] Furthermore, such as Figure 3 As shown, and in combination Figures 10-20 The clamping device includes a clamping assembly 4 and a support assembly 3. The support assembly 3 includes a mandrel 311, a bushing 37, and a fixing block 33. The bushing 37 is sleeved on the mandrel 311 and is fixedly connected to the fixing block 33, which is fixedly connected to the lower end of the column 2. The bushing 37 is used to pass through the lower end of the pipe to be welded. In this embodiment, the bushing 37 is used to pass through the five-way pipe 10, thereby providing support for the five-way pipe 10 and the middle pipe 20. The pressing assembly 8 includes a pressing drive 82, a third frame 81, and a pressing shaft 87. The pressing drive 82 is disposed at the upper end of the column 2 and can slide along the length direction of the column 2. The output shaft of the pressing drive 82 is connected to the third frame 81 and can drive the third frame 81 to slide along the length direction of the column 2. The pressing shaft 87 is fixedly connected to one end of the third frame 81 away from the pressing drive 82. The pressing shaft 87 can abut against the top of the pipe to be welded. In this embodiment, the pressing shaft 87 abuts against the top of the middle pipe 20. Thus, through the support of the bushing 37 and the pressing assembly 8, the middle pipe 20 and the five-way pipe 10 overlap more tightly, ensuring the quality and accuracy after welding.

[0058] like Figures 11-12As shown, the pressing assembly 8 also includes a drive plate 83, a fourth slider 84, a fifth slider 85, and a pressing head 86. The third frame 81 has a U-shaped structure. The fourth slider 84 and the fifth slider 85 are fixedly connected to both sides inside the third frame 81, and the fourth slider 84 and the fifth slider 85 are slidably engaged with the second slide rail 23 and the third slide rail 24, respectively. The pressing head 86 is fixedly connected to the third frame 81 and extends in a direction away from the opening of the third frame 81. The pressing shaft 87 is installed at the bottom of the pressing head 86. A positioning protrusion 871 is radially protruding on the pressing shaft 87. The positioning protrusion 871 is used to engage with the notch at the top of the middle tube 20 to position the middle tube 20 and prevent the middle tube 20 from rotating along its own axis during welding. The downward pressure drive component 82 slides and engages with the first slide rail 22, and is locked in place by a locking screw. A drive plate 83 is fixedly connected to the output end of the downward pressure drive component 82. The drive plate 83 is fixedly connected to the third frame 81, which can move up and down along the column 2 under the drive of the downward pressure drive component 82, thereby pressing or releasing the central tube 20. The downward pressure drive component 82 can be a telescopic cylinder or a linear motor; in this embodiment, a telescopic cylinder is preferred.

[0059] like Figures 13-20As shown, the support assembly 3 also includes a clamping drive 31, an intermediate disk 34, a guide rod 38, and a movable sleeve 39. The clamping assembly 4 includes an adjusting shaft 41, a clamping member 42, a return member, and a hinge shaft 44. The mandrel 311 is slidably coaxially disposed within the bushing 37. The guide rod 38 is fixedly disposed on the bushing 37, and the axis of the guide rod 38 is parallel to the axis of the mandrel 311. The clamping drive 31 is used to drive the mandrel 311 to slide within the bushing 37. The bushing 37 can penetrate into the interior of the pipe to support the pipe. In this embodiment, the pipe is a five-way pipe 10. The intermediate disk 34 is disposed between the bushing 37 and the fixing block 33. The intermediate disk 34 is fixedly connected to the fixing block 33, and the clamping drive 31 is mounted on the fixing block 33. The intermediate disk 34 is fixedly connected to the bushing 37 or is integrated into it. In this embodiment, the intermediate disk 34 and the bushing 37 are preferably integrated into each other. The movable sleeve 39 is fitted outside the bushing 37 and can slide axially along the bushing 37. When the clamping member 42 clamps the pipe fitting, the movable sleeve 39 abuts against the end of the pipe fitting away from the clamping member 42, thereby achieving axial positioning of the pipe fitting. The clamping member 42 can rotate relative to the mandrel 311 around a first axis. The extension direction of the first axis is perpendicular to the extension direction of the axis of the mandrel 311. The first axis is spaced apart from the axis of the guide rod 38. One side of the clamping member 42 is used to contact the end of the guide rod 38. The mandrel 311 can drive the clamping member 42 to move closer to or away from the pipe fitting to clamp or release the pipe fitting axially. The clamping device enables automatic clamping or releasing of the pipe fitting through the clamping drive member 31, eliminating the need for manual operation and improving production efficiency. Furthermore, the pipe fitting and surrounding components generate significant heat after welding, thus preventing operators from being burned by high temperatures when manually clamping or releasing the pipe fitting.

[0060] Furthermore, such as Figures 13-14 and combined Figures 19-20As shown, the adjusting shaft 41 is fixedly connected to the spindle 311, and the adjusting shaft 41 and the spindle 311 are coaxially arranged. In this embodiment, the adjusting shaft 41 is provided with a second threaded hole 412, and the spindle 311 is provided with an external thread. The adjusting shaft 41 is fixedly connected to the spindle 311 through the second threaded hole 412 and the external thread of the spindle 311. A first hinge portion 414 is provided at the end of the adjusting shaft 41 away from the spindle 311, and the clamping member 42 is provided with a second hinge portion 421 and a reversing block 422. The first hinge portion 414 and the second hinge portion 421 are hinged by a hinge shaft 44, and the axis of the hinge shaft 44 is the first axis. The reversing block 422 is used to contact the end of the guide rod 38 and to make the clamping member 42 rotate around the hinge shaft 44 in a first direction. In this embodiment, the reversing block 422 and the hinge shaft 44 are spaced apart. Specifically, the reversing block 422 is spaced apart from the hinge shaft 44 along the radial direction of the hinge shaft 44, and the extension direction of the reversing block 422 is perpendicular to the axial direction of the hinge shaft 44. One end of the reversing block 422 contacts the end of the guide rod 38. The spindle 311 drives the adjusting shaft 41 to move. During the process of the first hinge part 414 driving the clamping member 42 to approach the bottom bracket tube 10 through the hinge shaft 44, since the reversing block 422 abuts against the guide rod 38, the second hinge part 421 rotates around the hinge shaft 44 in the first direction. During this process, the reversing block 422 and the guide rod 38 slide relative to each other and always remain in contact, so that the clamping member 42 can contact one end of the bottom bracket tube 10 and clamp the bottom bracket tube 10 to achieve axial limitation.

[0061] It should be noted that the clamping member 42 has a relaxed state and a clamped state. When the clamping member 42 is in the relaxed state, its length direction is consistent with the axial direction of the bottom bracket 10, and its outer dimension is smaller than the inner diameter of the bottom bracket 10, so that the bottom bracket 10 can pass through the clamping member 42 in the relaxed state during the feeding process. When the clamping member 42 is in the clamped state, it rotates along the first direction until its length direction is perpendicular to the axial direction of the bottom bracket 10, and the length of the clamping member 42 is greater than the outer diameter of the bottom bracket 10, thereby achieving the clamping of the bottom bracket 10.

[0062] Specifically, in this embodiment, the return element is a tension spring 43. One end of the tension spring 43 is fixedly connected to the adjusting shaft 41, and the other end of the tension spring 43 passes through the clamping member 42. The tension spring 43 is used to make the clamping member 42 rotate around the hinge shaft 44 in a second rotation direction, the first rotation direction being opposite to the second rotation direction. The adjusting shaft 41 is also provided with a first threaded hole and a third receiving hole 413 that are connected. Part of the tension spring 43 is located in the third receiving hole 413. A fixing screw is threadedly connected to the first threaded hole, and one end of the tension spring 43 is fixed in the third receiving hole 413 by the fixing screw. The clamping member 42 is provided with a through mating hole 423, and the tension spring 43 can fit against the hole wall of the mating hole 423. The other end of the tension spring 43 passes through and extends out of the mating hole 423. When the clamping member 42 is in a relaxed state, the tension spring 43 is not under force; when the clamping member 42 is in a clamped state, the tension spring 43 undergoes elastic deformation synchronously with the clamping member 42. When the mandrel 311 drives the clamping member 42 to move away from the bottom bracket 10 via the adjusting shaft 41, the clamping member 42 rotates around the hinge shaft 44 in the second direction under the elastic force of the tension spring 43 until it returns to the relaxed state. By setting the tension spring 43, the clamping member 42 can automatically return to the relaxed state, which facilitates subsequent material loading.

[0063] In other embodiments, the return element can also be a torsion spring, i.e., a torsion spring is sleeved on the hinge shaft 44, with the two torsion spring arms contacting the first hinge portion 414 and the second hinge portion 421 respectively. The torsion spring is used to cause the clamping member 42 to rotate around the hinge shaft 44 in a second rotation direction, the first rotation direction being opposite to the second rotation direction. When the clamping member 42 is in the relaxed state, the torsion spring is not under force; when the clamping member 42 is in the clamped state, the torsion spring undergoes elastic deformation, and the two torsion spring arms abut against the first hinge portion 414 and the second hinge portion 421 respectively. When the mandrel 311 drives the clamping member 42 to move away from the bottom bracket 10 via the adjusting shaft 41, the clamping member 42 rotates around the hinge shaft 44 in the second direction under the elastic force of the torsion spring until it returns to the relaxed state. By setting the torsion spring, the clamping member 42 can automatically return to the relaxed state, facilitating subsequent material loading.

[0064] Furthermore, such as Figure 14-18As shown, the bushing 37 is provided with a through hole 371 for accommodating the guide rod 38, and the intermediate plate 34 is provided with a vertically connected receiving groove 342 and a limiting hole 343. The receiving groove 342 communicates with the through hole 371. A limiting block 361 is slidably disposed in the receiving groove 342. The limiting block 361 can slide in the receiving groove 342 and limit the guide rod 38. A limiting bolt 362 is slidably connected to the limiting block 361. The head of the limiting bolt 362 cooperates with the limiting hole 343, and the tail of the limiting bolt 362 passes through the limiting block 361 to restrict the sliding of the limiting block 361 in the receiving groove 342. This keeps the limiting block 361 limiting the guide rod 38 and prevents the guide rod 38 from moving along the axial direction of the bushing 37, which would cause the clamping member 42 to rotate too small and fail to clamp the bottom bracket 10. When the guide rod 38 needs to be replaced, the limit bolt 362 is dislodged from the limit hole 343, releasing the limit on the limit block 361. The limit block 361 slides out from the receiving groove 342 and then contacts the limit on the guide rod 38, so as to facilitate the replacement of the guide rod 38.

[0065] Specifically, the limiting block 361 is an L-shaped component, with an open end 3611 at one end and a through-hole 3612 with a stepped structure at the other end. The guide rod 38 is provided with an annular groove 381, and the open end 3611 is used to cooperate with the annular groove 381 to limit the guide rod 38. A second spring 363 is also provided between the limiting block 361 and the limiting bolt 362, and the second receiving hole 3612 can accommodate the limiting bolt 362 and the second spring 363. The two ends of the second spring 363 abut against the limiting bolt 362 and the limiting block 361 respectively, and the second spring 363 is used to make the limiting bolt 362 cooperate with the limiting hole 343. The second spring 363 is sleeved on the limiting bolt 362, with one end abutting against the large end of the limiting bolt 362 and the other end abutting against the step of the second receiving hole 3612. The second spring 363 is always in a compressed state. When the limiting bolt 362 is not subjected to external force, the head of the limiting bolt 362 engages with the limiting hole 343 under the elastic force of the second spring 363, thus preventing the limiting block 361 from sliding out of the receiving groove 342, thereby maintaining the axial limitation of the guide rod 38. When the guide rod 38 needs to be replaced, the tail of the limiting bolt 362 is pulled outward, the second spring 363 is further compressed, and the head of the limiting bolt 362 disengages from the limiting hole 343. At this time, the limiting block 361 can slide out of the receiving groove 342, canceling the axial limitation of the guide rod 38 and facilitating the replacement of the guide rod 38.

[0066] Furthermore, such as Figures 13-18 As shown, when switching to different lengths of pipe fittings, the corresponding movable sleeve 39 with different axial lengths should be replaced. When the clamping member 42 clamps the pipe fitting, the movable sleeve 39 abuts against the end of the pipe fitting away from the clamping member 42. This ensures that the clamping member 42 and the movable sleeve 39 work together to clamp the pipe fitting. Figures 13-15As shown, the movable sleeve 39 is provided with a connecting ear 391, which is located at the end of the movable sleeve 39 away from the pipe fitting and extends axially along the movable sleeve 39. The connecting ear 391 is provided with a communicating limiting groove 3911 and a U-shaped groove 3912. The intermediate disk 34 is also provided with a first receiving hole 344, in which an operating shaft 351 is slidably disposed. The operating shaft 351 is used to restrict the sliding of the movable sleeve 39 on the bushing 37. The operating shaft 351 is provided with a large end and a small end, at least a portion of the large end is located in the first receiving hole 344, and the portion of the large end can cooperate with the limiting groove 3911. An extension block 341 is also fixedly connected to the intermediate disk 34, and the small end of the operating shaft 351 is slidably engaged with the extension block 341. The smaller end can slide within the U-shaped groove 3912, and a first spring 352 is provided between the larger end and the first receiving hole 344. The two ends of the first spring 352 abut against the bottom wall of the larger end and the first receiving hole 344, respectively. The first spring 352 is always compressed, keeping the larger end within the first receiving hole 344 to restrict the sliding of the movable sleeve 39 on the bushing 37. This fixes the position of the movable sleeve 39 on the bushing 37, allowing it to clamp the corresponding length of pipe fitting together with the clamping member 42. When the movable sleeve 39 needs to be replaced, the smaller end of the operating shaft 351 is pressed down, further compressing the first spring 352, causing the larger end of the operating shaft 351 to disengage from the limiting groove 3911. At this time, the limiting groove 3911 can slide relative to the bushing 37, making the switching of the movable sleeve 39 faster and eliminating the need for fasteners, thus improving the efficiency of the mold switching process.

[0067] Optionally, the clamping drive 31 is a telescopic cylinder or a linear motor. In this embodiment, the clamping drive 31 is preferably a telescopic cylinder.

[0068] This utility model provides a clamp 200 for welding pipe fittings, including the clamping device in this embodiment. By setting the clamping device in this embodiment, there is no need for personnel to manually clamp and loosen the clamp, the clamp 200 has higher loading and unloading efficiency, and effectively avoids personnel being burned by high temperature during manual operation.

[0069] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A clamping device, characterized in that, include: The support assembly (3) includes a mandrel (311), a bushing (37), a guide rod (38), and a clamping drive (31). The mandrel (311) is slidably coaxially disposed within the bushing (37). The guide rod (38) is fixedly disposed on the bushing (37), and the axis of the guide rod (38) is parallel to the axis of the mandrel (311). The clamping drive (31) is used to drive the mandrel (311) to slide within the bushing (37). The bushing (37) can penetrate into the interior of the pipe to support the pipe. The clamping assembly (4) includes a clamping member (42) that is rotatable relative to the mandrel (311) about a first axis, the extension direction of the first axis being perpendicular to the extension direction of the axis of the mandrel (311), the first axis being spaced apart from the axis of the guide rod (38), one side of the clamping member (42) being used to contact the end of the guide rod (38), and the mandrel (311) being able to drive the clamping member (42) to move closer to or away from the pipe fitting, so as to clamp or release the pipe fitting along the axial direction of the pipe fitting.

2. The clamping device according to claim 1, characterized in that, The clamping assembly (4) further includes an adjusting shaft (41) and a hinge shaft (44). The adjusting shaft (41) is fixedly connected to the spindle (311). The adjusting shaft (41) and the spindle (311) are coaxially arranged. A first hinge portion (414) is provided at one end of the adjusting shaft (41) away from the spindle (311). The clamping member (42) is provided with a second hinge portion (421) and a reversing block (422). The first hinge portion (414) and the second hinge portion (421) are hinged through the hinge shaft (44). The axis of the hinge shaft (44) is the first axis. The reversing block (422) is used to contact the end of the guide rod (38) and cause the clamping member (42) to rotate around the hinge shaft (44) in a first rotation direction.

3. The clamping device according to claim 2, characterized in that, The clamping assembly (4) further includes a tension spring (43), one end of which is fixedly connected to the adjusting shaft (41), and the other end of which passes through the clamping member (42). The tension spring (43) is used to cause the clamping member (42) to rotate about the hinge shaft (44) in a second rotation direction, the first rotation direction being opposite to the second rotation direction.

4. The clamping device according to claim 2, characterized in that, A torsion spring is sleeved on the hinge shaft (44). The two torsion spring arms contact the first hinge part (414) and the second hinge part (421) respectively. The torsion spring is used to make the clamping member (42) rotate around the hinge shaft (44) in a second rotation direction. The first rotation direction is opposite to the second rotation direction.

5. The clamping device according to claim 1, characterized in that, The support assembly (3) further includes an intermediate disk (34), which is integrally formed with the bushing (37). The intermediate disk (34) is provided with a vertically connected receiving groove (342) and a limiting hole (343). The bushing (37) is provided with a through hole (371) for receiving the guide rod (38). The receiving groove (342) communicates with the through hole (371). A limiting hole is slidably provided in the receiving groove (342). The limiting block (361) is slidable within the receiving groove (342) and limits the guide rod (38). A limiting bolt (362) is slidably connected to the limiting block (361). The head of the limiting bolt (362) can cooperate with the limiting hole (343), and the tail of the limiting bolt (362) passes through the limiting block (361) to restrict the limiting block (361) from sliding within the receiving groove (342).

6. The clamping device according to claim 5, characterized in that, The guide rod (38) is provided with an annular groove (381), and the limiting block (361) is provided with an open end (3611). The open end (3611) is used to cooperate with the annular groove (381) to limit the guide rod (38). A second spring (363) is also provided between the limiting block (361) and the limiting bolt (362). The two ends of the second spring (363) abut against the limiting bolt (362) and the limiting block (361) respectively. The second spring (363) is used to make the limiting bolt (362) cooperate with the limiting hole (343).

7. The clamping device according to claim 5, characterized in that, The bushing (37) is fitted with a movable sleeve (39) on the outside. The movable sleeve (39) can slide along the axial direction of the bushing (37). When the clamping member (42) clamps the pipe, the movable sleeve (39) abuts against the end of the pipe away from the clamping member (42).

8. The clamping device according to claim 7, characterized in that, The movable sleeve (39) is provided with a connecting ear (391), and the connecting ear (391) is provided with a communicating limiting groove (3911) and a U-shaped groove (3912). The intermediate plate (34) is also provided with a first receiving hole (344). An operating shaft (351) is slidably disposed in the first receiving hole (344). The operating shaft (351) is provided with a large end and a small end. At least a portion of the large end is located in the first receiving hole (344), and the portion of the large end can... The small end can slide within the U-shaped groove (3912) in conjunction with the limiting groove (3911). A first spring (352) is provided between the large end and the bottom wall of the first receiving hole (344). The two ends of the first spring (352) abut against the large end and the bottom wall of the first receiving hole (344) respectively, so that part of the large end is located in the first receiving hole (344) to restrict the sliding of the movable sleeve (39) on the bushing (37).

9. The clamping device according to any one of claims 1-8, characterized in that, The clamping drive (31) is a telescopic cylinder or a linear motor.

10. A fixture, characterized in that, Includes the clamping device as described in any one of claims 1-9.

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