Workpiece clamping assembly and roundness detection device

Abstract

The utility model provides a workpiece clamping assembly which comprises an installation base, three installation holes are formed in the bottom of the installation base, the axes of the three installation holes are evenly arranged on the same circumference, a driving motor is arranged in each installation hole, a driving part of each driving motor downwards stretches out of the corresponding installation hole, an installation part is fixedly arranged at the bottom end of the driving part, and the installation part is fixedly connected with the installation base. The utility model further provides a roundness detection device, the roundness detection device comprises a detection table and the workpiece clamping assembly, a three-jaw chuck and a roundness detection sensor are arranged on the detection table, the three-jaw chuck and the roundness detection sensor are arranged on the three-jaw chuck, the workpiece clamping assembly is arranged on the three-jaw chuck, and the three-jaw chuck and the roundness detection sensor are arranged on the workpiece clamping assembly. A mechanical arm is arranged on one side of the detection table, a mounting frame is arranged at the end of the mechanical arm, the top of the mounting seat is connected with the bottom of the mounting frame, imaging equipment and height detection equipment are further arranged on the mounting frame, and space occupation can be reduced while it is guaranteed that workpieces are effectively clamped and positioned.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical workpiece machining accuracy detection equipment, in particular to a workpiece clamping component and a roundness detection device. Background Art

[0002] The contents of this section merely provide background information related to the present invention and may not constitute prior art.

[0003] With the rapid development of domestic manufacturing industry, the quality requirements for products are getting higher and higher, among which the requirements for workpiece processing accuracy are also getting higher and higher. Among the measurement standards of workpiece processing accuracy, roundness or cylindricity is the key indicator to measure workpiece accuracy. When testing the roundness or cylindricity of the workpiece, a roundness meter is usually used for testing.

[0004] In the process of inspecting workpieces, manual loading and unloading of workpieces has certain limitations, especially when the amount to be inspected is large, the work pressure of staff and the labor costs of the enterprise are increased exponentially. On this basis, in order to ensure that all workpieces to be inspected are inspected, using machines instead of manual loading and unloading of workpieces has become the choice of most companies.

[0005] However, the related technology has the following defects: when the roundness of the workpiece is detected, the space available on the roundness detector is relatively small, and the traditional clamping method mostly uses two clamping rods to clamp the workpiece in a relative horizontal movement, which results in the clamping assembly occupying a large space. For some workpieces to be detected that are originally larger in diameter, the traditional clamping method is difficult to effectively clamp and position the large-sized workpiece to be detected within a limited space, and a clamping rod with a larger surface area has to be used to improve the clamping stability, which further squeezes the space. Summary of the invention

[0006] In order to solve the above technical problems, the purpose of the utility model is to provide a workpiece clamping assembly and a roundness detection device, which can reduce space occupancy while ensuring effective clamping and positioning of the workpiece.

[0007] On the one hand, the utility model provides a workpiece clamping assembly, which adopts the following technical solution:

[0008] A workpiece clamping assembly includes a mounting seat, three mounting holes are opened in the bottom of the mounting seat in the vertical direction, the axes of the three mounting holes are evenly arranged on the same circumference, a driving motor is arranged in each mounting hole, a driving part of the driving motor extends downward out of the mounting hole, a mounting part is fixedly arranged at the bottom end of the driving part, a mounting rod is arranged at the bottom end of the mounting part, one end of the mounting rod is connected to the mounting part, and a clamping part is arranged at the bottom of the other end of the mounting rod in the vertical direction.

[0009] By adopting the above technical solution, in actual use, when the workpiece needs to be clamped, the mounting part is deflected by driving the motor, and the mounting part drives the mounting rod to rotate, and the mounting rod then drives the clamping part to rotate toward the center of the mounting seat. By setting three mounting rods and three clamping parts, the workpiece to be inspected is clamped, which can effectively improve the clamping stability of the workpiece to be inspected. At the same time, by adopting this clamping method, the clamping range of the workpiece size is related to the size of the mounting seat, and workpieces of a larger size range can be clamped in a limited space, which effectively improves the overall practicality of the device.

[0010] In some possible embodiments, the mounting rod includes a first support rod and a second support rod, the first support rod is horizontally arranged, the second support rod is arranged at one end of the first support rod, and the outer end of the second support rod is inclined downward in a direction away from the mounting seat, the first support rod is connected to the mounting portion, and the clamping portion is arranged at one end of the second support rod away from the first support rod.

[0011] By adopting the above technical solution, the clamping dead angle between the ends of the three mounting rods can be effectively reduced, so that a smaller workpiece to be inspected can be effectively clamped, thereby further improving the practicability of the device.

[0012] In some possible embodiments, a receiving hole is opened at the bottom of the mounting portion, a connecting rod is rotatably arranged in the vertical direction in the receiving hole, the bottom of the connecting rod is fixedly connected to the top of the first support rod, a first elastic member is arranged in the receiving hole, the first elastic member is used to drive the mounting rod to deflect in a direction away from the center of the mounting seat, and a limiting member is arranged on the connecting rod, and the limiting member is used to limit the deflection angle of the mounting rod.

[0013] By adopting the above technical solution, when clamping the workpiece, it is necessary to effectively clamp the workpiece while also protecting the surface of the workpiece. By providing a connecting rod and a first elastic member, hard contact between the clamping part and the workpiece can be avoided, and the workpiece can be effectively clamped while also being well protected.

[0014] In some possible embodiments, the first elastic member is configured as a torsion spring, the diameter of the accommodating hole is larger than the diameter of the connecting rod, the first elastic member is sleeved on the outer periphery of one end of the connecting rod located in the accommodating hole, one end of the first elastic member is fixedly connected to the connecting rod, and the other end is fixedly connected to the inner wall of the accommodating hole.

[0015] In some possible embodiments, the limiting member is configured as a limiting block, and an annular groove is opened on the hole wall of the accommodating hole along the circumference of the accommodating hole. The limiting block is slidably arranged in the annular groove. The limiting block is fixedly connected to the peripheral wall of the connecting rod, and a baffle is arranged in the annular groove. The baffle is used to abut against the side wall of the limiting block to limit the position of the limiting block in the annular groove.

[0016] In some possible embodiments, the clamping portion includes a vertical rod and an abutment portion, the top end of the vertical rod is fixedly connected to an end of the second support rod away from the first support rod, and the abutment portion is detachably disposed at the bottom of the vertical rod.

[0017] In some possible embodiments, a mounting groove is provided at the top of the abutment portion, an internal thread is provided on the inner wall of the mounting groove, and an external thread is provided on the peripheral wall at the bottom end of the vertical rod, the internal thread is adapted to the external thread, an abutment plate is provided in the mounting groove for sliding along the vertical direction, the top of the abutment plate is used to abut against the bottom of the vertical rod, a second elastic member is provided in the mounting groove, the abutment plate can press the second elastic member downward, and the second elastic member is used to drive the abutment plate to move toward the notch of the mounting groove.

[0018] By adopting the above technical solution, the abutment portion can be replaced according to different types of workpieces to be inspected, so that the abutment portion used in the working process is adapted to fit the workpiece to be inspected, thereby ensuring the clamping and positioning stability of the workpiece to be inspected, and further improving the overall practicality of the device.

[0019] In some possible embodiments, an anti-slip block is fixedly provided on the inner wall of the mounting groove, the anti-slip block is located below the internal thread, the bottom of the anti-slip block is used to abut against the top of the abutment plate, an extension block is provided at the bottom of the vertical rod, the diameter of the extension block is smaller than the diameter of the vertical rod, the extension block is protruded downward, the bottom of the extension block is used to abut against the abutment plate, the second elastic member is provided as a compression spring, one end of the second elastic member abuts against the bottom wall of the mounting groove, and the other end abuts against the bottom of the abutment plate.

[0020] In some possible embodiments, a ball is embedded on the top of the abutment plate, and the ball is used to roll in contact with the bottom of the extension block.

[0021] By adopting the above technical solution, when the abutment part is installed, the ball converts the sliding contact between the bottom of the extension block and the abutment plate into rolling contact, which effectively reduces the friction between the bottom of the extension block and the abutment plate, facilitates the installation of the abutment part, and effectively reduces the wear between the bottom of the extension block and the abutment plate, thereby improving the service life of the device to a certain extent.

[0022] In some possible embodiments, a protective pad is provided on the outside of the abutting portion, and the protective pad is used to abut against the workpiece to be detected.

[0023] By adopting the above technical solution, the outer surface of the workpiece to be inspected can be further protected by providing a protective pad, thereby avoiding damage to the workpiece surface during the inspection and clamping process, thereby improving the practicability of the device.

[0024] On the other hand, the utility model also provides a roundness detection device, which adopts the following technical solution:

[0025] A roundness detection device includes a detection table and a workpiece clamping assembly as described above, wherein a three-jaw chuck and a roundness detection sensor are arranged on the detection table, a manipulator is arranged on one side of the detection table, and a mounting frame is arranged at the end of the manipulator, the mounting frame is a cylindrical structure, the top of the mounting seat of the workpiece clamping assembly is connected to the bottom of the inner cavity of the mounting frame, and an imaging device and a height detection device are also arranged in the inner cavity of the mounting frame.

[0026] In summary, the technical solution of the embodiment of the utility model has at least the following advantages and beneficial effects:

[0027] 1. In actual use, when the workpiece needs to be clamped, the mounting part is deflected by driving the motor, and the mounting part drives the mounting rod to rotate, and the mounting rod further drives the clamping part to rotate toward the center of the mounting seat. By setting three mounting rods and three clamping parts to clamp the workpiece to be inspected, the clamping stability of the workpiece to be inspected can be effectively improved. At the same time, by adopting this clamping method, the clamping range of the workpiece size is related to the size of the mounting seat, and workpieces within a larger size range can be clamped in a limited space, which effectively improves the overall practicality of the device.

[0028] 2. By tilting the second support rod relative to the first support rod, the clamping dead angle between the ends of the three second support rods can be effectively reduced, so that smaller workpieces to be inspected can be effectively clamped, thereby further improving the practicability of the device.

[0029] 3. When clamping the workpiece, it is necessary to effectively clamp the workpiece while protecting the surface of the workpiece. By setting the connecting rod and the first elastic member, hard contact between the clamping part and the workpiece can be avoided, and the workpiece can be effectively clamped while also having a good protective effect on the surface of the workpiece.

[0030] 4. The abutment part can be replaced according to different types of workpieces to be detected, so that the abutment part used in the working process is adapted to the workpiece to be detected, thereby ensuring the clamping and positioning stability of the workpiece to be detected, and further improving the overall practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic structural diagram of the first embodiment of the clamping assembly of the utility model;

[0032] Figure 2 It is a partial structural diagram of the mounting seat of the clamping assembly of the utility model;

[0033] Figure 3 It is a schematic diagram of the exploded structure of the first embodiment of the connection method between the mounting rod and the driving motor of the utility model;

[0034] Figure 4 It is a schematic diagram of the clamping state structure of the clamping assembly of the utility model;

[0035] Figure 5 It is a structural schematic diagram of a second embodiment of the connection method between the mounting rod and the driving motor of the utility model;

[0036] Figure 6 It is a schematic diagram of the exploded structure of the second embodiment of the connection method between the mounting rod and the driving motor of the utility model;

[0037] Figure 7 It is a cross-sectional view of a second embodiment of the mounting portion of the utility model;

[0038] Figure 8 It is a schematic diagram of the exploded structure of the second embodiment of the clamping part of the utility model;

[0039] Fig. 9 It is a cross-sectional view of a second embodiment of the abutment portion of the utility model;

[0040] Fig.10 It is a schematic diagram of the overall structure of the roundness detection device of the utility model;

[0041] Fig.11 It is a schematic diagram of the internal structure of the mounting frame of the utility model.

[0042] Icons: 1. Mounting seat; 11. Mounting hole; 12. Driving motor; 13. Driving part; 14. Mounting part; 15. Strip slot; 16. Strip block; 17. Clamping shaft; 18. Clamping hole; 2. Mounting rod; 21. First support rod; 22. Second support rod; 23. First connecting hole; 3. Clamping part; 31. Vertical rod; 32. Abutting part; 33. Second connecting hole; 34. Slot; 4. Accommodating hole; 41. Connecting rod; 42. Through hole; 43. First elastic member; 44. Limiting member; 45. Annular groove; 46. Blocking piece; 5. Mounting groove; 51. Internal thread; 52. External thread; 53. Abutment plate; 54. Second elastic member; 55. Anti-slip block; 56. Extension block; 57. Ball; 6. Protection pad; 7. Inspection table; 71. Three-jaw chuck; 72. Roundness detection sensor; 73. Area to be inspected; 74. Inspected area; 75. Robot; 76. Mounting frame; 77. Imaging equipment; 78. Height detection equipment; 8. Workpiece to be inspected. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0044] The following reference Figures 1 to 11 The utility model is described in further detail.

[0045] In one aspect, the utility model provides a workpiece clamping assembly.

[0046] A workpiece clamping assembly is used to clamp a workpiece 8 to be inspected. The shape of the workpiece 8 to be inspected is as follows: Fig.10 As shown, it is cylindrical.

[0047] Reference Figure 1 , 2 A workpiece clamping assembly includes a mounting seat 1, the top of which is connected to a mounting frame 76 of a roundness detection device, as shown in FIG. Fig.11 Three mounting holes 11 are provided at the bottom of the mounting seat 1 in the vertical direction, the axes of the three mounting holes 11 are evenly arranged on the same circumference, and the horizontal lines connecting the axes of the three mounting holes 11 form an equilateral triangle.

[0048] like Figure 2 , 3As shown, a driving motor 12 is arranged in each mounting hole 11, and the housing of the driving motor 12 is fixedly connected to the inner wall of the mounting hole 11 by connecting bolts (not shown in the figure), and the driving part 13 of the driving motor 12 extends downwardly out of the mounting hole 11, and a mounting part 14 is fixedly connected to the bottom end of the driving part 13, and a mounting rod 2 is arranged at the bottom end of the mounting part 14, and a clamping part 3 is arranged at one end of the mounting rod 2 away from the mounting part 14 in the vertical direction. As an embodiment of the utility model, refer to Figure 2 , 3 The driving motor 12, the driving portion 13 of the driving motor 12 and the mounting portion 14 have the same diameter and are arranged in sequence from top to bottom.

[0049] Reference Figure 2 , 3 As an embodiment of the utility model, the mounting rod 2 includes a first support rod 21 and a second support rod 22. The first support rod 21 is horizontally arranged, the second support rod 22 is arranged at one end of the first support rod 21, and the outer end of the second support rod 22 is inclined in a direction away from the mounting seat 1, that is, the outer end of the second support rod 22 is inclined downward, the first support rod 21 is connected to the mounting portion 14, and the end of the second support rod 22 away from the first support rod 21 is provided with a clamping portion 3. By arranging the second support rod 22 obliquely relative to the first support rod 21, the clamping dead angle between the ends of the three second support rods 22 can be effectively reduced, so that the workpiece 8 to be detected with a smaller size can be effectively clamped, thereby further improving the practicality of the device.

[0050] Reference Figure 3 A strip-shaped card slot 15 is provided at the bottom of the mounting portion 14 along the radial direction of the mounting portion 14, and the strip-shaped card slot 15 is penetrated on both sides in the length direction. A strip-shaped card block 16 is provided on the top of the first support rod 21 to protrude upward. The strip-shaped card block 16 and the strip-shaped card slot 15 are mutually engaged and adapted. A card-connecting shaft 17 is fixedly provided in the middle of the strip-shaped card slot 15 along the vertical direction. A card-connecting hole 18 is provided downward at the top of the strip-shaped card block 16. The card-connecting hole 18 penetrates the strip-shaped card block 16 and extends downward into the first support rod 21. The card-connecting hole 18 and the card-connecting shaft 17 are connected by interference fit.

[0051] Reference Figure 3 A first connecting hole 23 is vertically provided at the bottom of the first support rod 21. The first connecting hole 23 is formed as a countersunk hole. The first connecting hole 23 passes through the first support rod 21 and the strip-shaped block 16 from top to bottom. A bolt is provided in the first connecting hole 23. A first threaded hole for threaded connection of the bolt is provided on the top wall of the strip-shaped slot 15. There are two first connecting holes 23. The two first connecting holes 23 are respectively provided on both sides of the clamping hole 18. A bolt is provided in each first connecting hole 23. Two corresponding first threaded holes are also provided. The two first threaded holes are symmetrically provided on both sides of the clamping shaft 17.

[0052] Reference Figure 3 The clamping portion 3 includes a vertical rod 31 and a contact portion 32, the top end of the vertical rod 31 is fixedly connected to an end of the second support rod 22 away from the first support rod 21, or the vertical rod 31 and the second support rod 22 are integrally formed, and the contact portion 32 and the vertical rod 31 are detachably connected.

[0053] Reference Figure 3 As an embodiment of the present utility model, a second connecting hole 33 is opened in the vertical direction at one end of the second support rod 22 away from the first support rod 21, the second connecting hole 33 passes through the second support rod 22 up and down, a bolt is slidably passed through the second connecting hole 33, a slot 34 for the abutment portion 32 to be plugged and connected is opened at the bottom of the vertical rod 31, the second connecting hole 33 and the slot 34 are connected to each other, the diameter of the slot 34 is larger than the diameter of the second connecting hole 33, and a second threaded hole for the second bolt to be threadedly connected is opened at the top of the abutment portion 32.

[0054] In the process of clamping the workpiece, the driving motor 12 is started to drive the driving part 13 to rotate, the driving part 13 drives the mounting part 14 to rotate, the mounting part 14 drives the first support rod 21 to deflect toward the center of the mounting seat 1, the first support rod 21 drives the second support rod 22 and then drives the abutment part 32 to deflect, and finally deflects to Figure 4 In the position shown in FIG. 1 , a clamping cavity for clamping a workpiece is formed between the three abutting portions 32. Figure 2 The initial position shown to Figure 4 The clamping position shown effectively improves the clamping range within a limited space and can be applied to workpieces 8 to be inspected of more sizes and types. At the same time, compared with the clamping method of two clamping rods, the clamping method of three abutment parts 32 can effectively improve the clamping stability of the workpiece 8 to be inspected.

[0055] As another embodiment of the present invention, refer to Figure 5 , 6 A receiving hole 4 is provided at the bottom of the mounting portion 14, and a connecting rod 41 is rotatably installed in the receiving hole 4 along the vertical direction. For example, the connecting rod 41 is rotatably connected to the top of the receiving hole 4 through a rolling bearing. A through hole 42 is provided on the first support rod 21, and the through hole 42 is set as a countersunk hole. A connecting bolt is provided in the through hole 42, and a threaded hole for threaded connection of the connecting bolt is provided on the connecting rod 41.

[0056] Reference Figure 6 , 7 A first elastic member 43 is arranged in the accommodating hole 4, and the first elastic member 43 is used to drive the mounting rod 2 to deflect toward the center direction away from the mounting seat 1. A limiting member 44 is fixedly arranged on the connecting rod 41, and the limiting member 44 is used to limit the deflection angle of the mounting rod 2.

[0057] Among them, refer to Figure 7 The first elastic member 43 is configured as a torsion spring. The diameter of the accommodating hole 4 is larger than the diameter of the connecting rod 41. The first elastic member 43 is sleeved on the outer periphery of one end of the connecting rod 41 located in the accommodating hole 4. One end of the first elastic member 43 is fixedly connected to the connecting rod 41, and the other end is fixedly connected to the inner wall of the accommodating hole 4.

[0058] Reference Figure 6 , 7 As an embodiment of the present utility model, the limiting member 44 is configured as a limiting block, and an annular groove 45 is opened on the hole wall of the accommodating hole 4 along the circumference of the accommodating hole 4. The limiting block is slidably arranged in the annular groove 45. The annular groove 45 is located above or below the first elastic member 43. The limiting block is fixedly connected to the peripheral wall of the connecting rod 41. A blocking piece 46 is fixedly arranged in the annular groove 45. The blocking piece 46 is used to abut against the side wall of the limiting block to limit the position of the limiting block in the annular groove 45.

[0059] Among them, refer to Figure 7 There are two limit members 44 , which are symmetrically arranged on both sides of the connecting rod 41 along the axis of the connecting rod 41 . Similarly, two blocking pieces 46 are correspondingly arranged in the annular groove 45 , and the blocking pieces 46 correspond to the limit members 44 one by one.

[0060] During actual use, the drive motor 12 is started to drive the mounting portion 14 to rotate. When the clamping portion 3 is not in contact with the workpiece, the first elastic member 43 is not affected by external force. Therefore, the mounting portion 14 drives the connecting rod 41 to rotate synchronously through the first elastic member 43, and the connecting rod 41 further drives the first support rod 21 and the second support rod 22 to deflect. When the clamping portion 3 is in contact with the workpiece, the clamping portion 3, the second support rod 22 and the first support rod 21 stop deflecting. At this time, relative deflection occurs between the mounting portion 14 and the connecting rod 41, and the first elastic member 43 is subjected to external force to generate a certain elastic potential energy, and then acts on the connecting rod 41, which has the effect of clamping and positioning the workpiece, and can also avoid hard contact between the clamping portion 3 and the workpiece, thereby having a good protective effect on the surface of the workpiece.

[0061] Reference Figure 8 , 9As another embodiment of the present utility model, the top end of the vertical rod 31 is fixedly connected to the end of the second support rod 22 away from the first support rod 21, and a mounting groove 5 is provided at the top of the abutting portion 32, and an internal thread 51 is provided on the inner wall of the mounting groove 5, and an external thread 52 is provided on the peripheral wall at the bottom end of the vertical rod 31, and the internal thread 51 is adapted to the external thread 52. An abutment plate 53 is provided in the mounting groove 5 for sliding along the vertical direction, and the top of the abutment plate 53 is used to abut against the bottom of the vertical rod 31, and a second elastic member 54 is provided in the mounting groove 5, and the second elastic member 54 is used to drive the abutment plate 53 to move toward the notch of the mounting groove 5.

[0062] Among them, refer to Figure 8 , 9 An anti-slip block 55 is fixedly provided on the inner wall of the mounting groove 5, and the anti-slip block 55 is located below the internal thread 51. The bottom of the anti-slip block 55 is used to abut against the top of the abutment plate 53. An extension block 56 is provided at the bottom of the vertical rod 31. The diameter of the extension block 56 is smaller than the diameter of the vertical rod 31. The extension block 56 is protruded downward, and the bottom of the extension block 56 is used to abut against the abutment plate 53. The second elastic member 54 is provided as a compression spring, and one end of the second elastic member 54 abuts against the bottom wall of the mounting groove 5, and the other end abuts against the bottom of the abutment plate 53.

[0063] When the abutting portion 32 is installed, the abutting portion 32 can be installed on the vertical rod 31 by the internal thread 51 and the external thread 52 that mesh with each other. As the abutting portion 32 is installed, the extension block 56 finally abuts against the top of the abutting plate 53. As the abutting portion 32 and the vertical rod 31 are further screwed together, the extension block 56 presses the abutting plate 53 downward, and the abutting plate 53 presses the second elastic member 54 downward. The second elastic member 54 is compressed to generate elastic potential energy and acts on the abutting portion 32, so that the abutting portion 32 has a downward movement tendency. At this time, since the abutting portion 32 and the vertical rod 31 are connected by threaded engagement, the friction force between the internal thread 51 and the external thread 52 that mesh with each other can be further improved, thereby further improving the stability and reliability of the abutting portion 32 installed on the vertical rod 31, effectively avoiding the abutting portion 32 from falling off from the vertical rod 31 during the process of clamping the workpiece, thereby improving the reliability of the device during actual use.

[0064] As an implementation mode of the present utility model, refer to Figure 8 , 9A ball 57 is embedded on the top of the abutment plate 53, and the ball 57 is used to roll with the bottom of the extension block 56. When the abutment portion 32 is installed, the ball 57 changes the sliding contact between the bottom of the extension block 56 and the abutment plate 53 into rolling contact, effectively reducing the friction between the bottom of the extension block 56 and the abutment plate 53, facilitating the installation of the abutment portion 32, and effectively reducing the wear between the bottom of the extension block 56 and the abutment plate 53, thereby improving the service life of the device to a certain extent.

[0065] As an implementation mode of the present utility model, refer to Figure 8 , 9 A protective pad 6 is provided on the outside of the abutting portion 32, and the protective pad 6 is used to abut against the workpiece 8 to be detected. The protective pad 6 can further improve the protection effect of the outer surface of the workpiece during the clamping process. Preferably, the material of the protective pad 6 is set to silicone rubber, which can improve the friction with the outer surface of the workpiece, improve the protection of the outer surface of the workpiece, and reduce the wear on the workpiece surface.

[0066] On the other hand, the utility model also provides a roundness detection device.

[0067] Reference Fig.10 , 11 A roundness detection device includes a detection table 7, on which a three-jaw chuck 71 and a roundness detection sensor 72 are arranged, a to-be-detected area 73 is arranged on one side of the detection table 7, and the to-be-detected area 73 is used to place a to-be-detected workpiece 8, and usually a plurality of to-be-detected workpieces 8 can be placed in the to-be-detected area 73, and an inspected area 74 is arranged on the other side of the detection table 7, and the inspected area 74 is used to place the workpieces that have completed the inspection, a manipulator 75 is arranged on one side of the detection table 7, and a mounting frame 76 is arranged at the end of the manipulator 75, and the mounting frame 76 is a cylindrical structure, the top of the mounting seat 1 of the above-mentioned workpiece clamping assembly is connected to the bottom of the inner cavity of the mounting frame 76, and an imaging device 77 and a height detection device 78 are also arranged in the inner cavity of the mounting frame 76.

[0068] Reference Fig.11 The mounting frame 76 is set to be cylindrical, the bottom of the mounting frame 76 is set to be open, the top of the mounting base 1 and the mounting frame 76 are fixedly connected by bolts. As an embodiment of the utility model, the imaging device 77 is set to be a camera, and the height detection device 78 is set to be a laser rangefinder.

[0069] In actual use, the height and horizontal position of the workpiece 8 to be detected are first determined by the imaging device 77 and the height detection device 78, and then the manipulator 75 drives the mounting frame 76 to move toward the workpiece 8 to be detected, and the workpiece 8 to be detected is clamped by the clamping part 3, and then the manipulator 75 drives the mounting frame 76 to move toward the three-jaw chuck 71, and the workpiece 8 to be detected is placed on the three-jaw chuck 71 through the workpiece clamping assembly as described above, and then the workpiece clamping assembly is released to clamp the workpiece 8 to be detected, and the workpiece 8 located on the three-jaw chuck is clamped. The workpiece 8 to be inspected at the center of 71 is positioned and clamped by the three-jaw chuck 71. The three-jaw chuck 71 is started to drive the workpiece 8 to be inspected, and then the roundness detection sensor 72 is started to detect the roundness of the workpiece 8 to be inspected. After the detection is completed, the three-jaw chuck 71 is released to fix the workpiece, and the manipulator 75 is used to drive the above-mentioned workpiece clamping assembly to clamp and transfer the inspected workpiece to the inspected area 74 on the other side of the inspection table 7. The roundness detection of one workpiece can be completed. Repeat this process to complete the roundness detection of the second to Nth workpieces.

[0070] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A workpiece clamping assembly, characterized in that: The invention comprises a mounting seat (1), three mounting holes (11) are provided at the bottom of the mounting seat (1) in a vertical direction, the axes of the three mounting holes (11) are evenly arranged on the same circumference, a driving motor (12) is arranged in each mounting hole (11), a mounting portion (14) is fixedly arranged at the bottom end of the driving portion (13), a mounting rod (2) is arranged at the bottom end of the mounting portion (14), one end of the mounting rod (2) is connected to the mounting portion (14), and a clamping portion (3) is arranged at the bottom of the other end of the mounting rod (2) in a vertical direction.

2. A workpiece clamping assembly according to claim 1, characterized in that: The mounting rod (2) comprises a first support rod (21) and a second support rod (22), the first support rod (21) being arranged horizontally, the second support rod (22) being arranged at one end of the first support rod (21), and the outer end of the second support rod (22) being arranged tilted downward in a direction away from the mounting seat (1), the first support rod (21) being connected to the mounting portion (14), and the clamping portion (3) being arranged at one end of the second support rod (22) away from the first support rod (21).

3. A workpiece clamping assembly according to claim 2, characterized in that: A receiving hole (4) is provided at the bottom of the mounting portion (14), a connecting rod (41) is rotatably arranged in the vertical direction in the receiving hole (4), the bottom of the connecting rod (41) is fixedly connected to the top of the first support rod (21), a first elastic member (43) is provided in the receiving hole (4), the first elastic member (43) is used to drive the mounting rod (2) to deflect in a direction away from the center of the mounting seat (1), and a limiting member (44) is provided on the connecting rod (41), the limiting member (44) is used to limit the deflection angle of the mounting rod (2).

4. A workpiece clamping assembly according to claim 3, characterized in that: The first elastic member (43) is configured as a torsion spring, the diameter of the accommodating hole (4) is larger than the diameter of the connecting rod (41), the first elastic member (43) is sleeved on one end of the connecting rod (41) located in the accommodating hole (4), one end of the first elastic member (43) is fixedly connected to the connecting rod (41), and the other end is fixedly connected to the inner wall of the accommodating hole (4).

5. A workpiece clamping assembly according to claim 3, characterized in that: The limiting member (44) is arranged as a limiting block. An annular groove (45) is provided on the hole wall of the containing hole (4) along the circumference of the containing hole (4). The limiting member (44) is slidably arranged in the annular groove (45). The limiting member (44) is fixedly connected to the circumferential wall of the connecting rod (41). A blocking piece (46) is arranged in the annular groove (45). The blocking piece (46) is used to abut against the side wall of the limiting member (44) to limit the position of the limiting block in the annular groove (45).

6. A workpiece clamping assembly according to claim 2, characterized in that: The clamping portion (3) comprises a vertical rod (31) and an abutment portion (32); the top end of the vertical rod (31) is fixedly connected to an end of the second support rod (22) away from the first support rod (21); and the abutment portion (32) is detachably arranged at the bottom of the vertical rod (31).

7. A workpiece clamping assembly according to claim 6, characterized in that: A mounting groove (5) is provided at the top of the abutting portion (32), an internal thread (51) is provided on the inner wall of the mounting groove (5), an external thread (52) is provided on the peripheral wall of the bottom end of the vertical rod (31), the external thread (52) being matched with the internal thread (51), an abutting plate (53) is slidably arranged in the mounting groove (5) along the vertical direction, the top of the abutting plate (53) being used to abut against the bottom of the vertical rod (31), an extension block (56) is provided at the bottom of the vertical rod (31), the diameter of the extension block (56) being smaller than the diameter of the vertical rod (31), the extension block (56) being protruding downward, the bottom of the extension block (56) being used to abut against the abutting plate (53), a second elastic member (54) is provided in the mounting groove (5), the abutting plate (53) being able to press the second elastic member (54) downward, the second elastic member (54) being used to drive the abutting plate (53) to move in the direction of the notch of the mounting groove (5).

8. A workpiece clamping assembly according to claim 7, characterized in that: An anti-slip block (55) is fixedly arranged on the inner wall of the mounting groove (5), the anti-slip block (55) being located below the internal thread (51), the bottom of the anti-slip block (55) being used to abut against the top of the abutment plate (53), the second elastic member (54) being arranged as a compression spring, one end of the second elastic member (54) abutting against the bottom wall of the mounting groove (5), and the other end abutting against the bottom of the abutment plate (53).

9. A workpiece clamping assembly according to claim 7, characterized in that: A ball (57) is embedded on the top of the abutment plate (53), and the ball (57) is used to roll in contact with the bottom of the extension block (56); a protective pad (6) is covered on the outside of the abutment portion (32), and the protective pad (6) is used to abut against a workpiece (8) to be detected.

10. A roundness detection device, comprising a detection table (7), a three-jaw chuck (71) and a roundness detection sensor (72) being arranged on the detection table (7), and a manipulator (75) being arranged on one side of the detection table (7), characterized in that: It also includes a workpiece clamping assembly as described in any one of claims 1 to 9, wherein a mounting frame (76) is provided at the end of the manipulator (75), the mounting frame (76) is a cylindrical structure, the top of the mounting seat (1) of the workpiece clamping assembly is connected to the bottom of the inner cavity of the mounting frame (76), and an imaging device (77) and a height detection device (78) are also provided in the inner cavity of the mounting frame (76).

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