Clamping and positioning device

Abstract

The invention belongs to the technical field of mechanical clamping, and discloses a clamping and positioning device. The clamping and positioning device comprises a base frame, a linkage assembly, a connecting rod assembly, a clamping assembly and a positioning piece, the linkage assembly comprises a sliding rod and a first connecting piece, at least part of the sliding rod is arranged in the base frame in a sliding mode, the end of the sliding rod is connected with the first connecting piece, and the sliding rod can move to drive the first connecting piece to move; the first end of the connecting rod assembly is rotationally connected with the base frame, the clamping assembly is arranged on the first connecting piece, the second end of the connecting rod assembly is rotationally connected with the clamping assembly, the first connecting piece moves to drive the connecting rod assembly to rotate, then the clamping assembly is driven to move, and the clamping assembly can selectively clamp or loosen a product. The center axis of the first connecting piece and the center axis of the product are collinear with the center axis of the clamping area of the clamping assembly, the positioning piece is connected with the first connecting piece, the positioning piece is configured to position the center line of the product, the center line of the product can be accurately positioned, and follow-up product machining operation is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical clamping, and particularly to a clamping and positioning device. Background Art

[0002] In many fields such as semiconductors and photovoltaics, as an important basic material, the processing and handling of a crystal bar require extremely high precision and accuracy. Among them, determining the center line of the cross-section of the crystal bar is a key and basic operation, which requires marking the center line on the cross-section of the crystal bar, dividing the crystal bar into four equal parts, and not causing damage to the surface of the crystal bar.

[0003] Currently, positioning grooves are provided on the crystal bar, and the center line marked on the cross-section of the crystal bar needs to pass through the positioning grooves on the crystal bar. The conventional line-drawing method requires visual observation for positioning and uses two straight rulers to cross-draw lines. This operation is extremely susceptible to the subjective factors of the operator. The operation differences between different operators will result in relatively large positioning deviations of the center line, and it is easy to have a situation where the two center lines are not perpendicular, and there will also be a situation where the center line does not pass through the positioning grooves on the crystal bar, making it difficult to meet the requirements of modern high-precision processing for controlling the center positioning error of the crystal bar within a very small range.

[0004] Therefore, there is an urgent need for a clamping and positioning device to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a clamping and positioning device, which can accurately clamp and position products, improve the accuracy of positioning the center line of products, facilitate subsequent processing operations of products, and improve production efficiency and product quality.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] A clamping and positioning device, comprising:

[0008] A base frame;

[0009] A linkage assembly, including a sliding rod and a first connecting member. At least part of the sliding rod is slidably disposed within the base frame, and the end of the sliding rod is connected to the first connecting member. The movement of the sliding rod can drive the movement of the first connecting member;

[0010] A link assembly, the first end of which is rotatably connected to the base frame;

[0011] A clamping assembly, disposed on the first connecting member. The second end of the link assembly is rotatably connected to the clamping assembly. The movement of the first connecting member can drive the rotation of the link assembly, and further drive the movement of the clamping assembly. The clamping assembly can selectively clamp or release the product. The central axis of the first connecting member and the central axis of the product are both collinear with the central axis of the clamping area of the clamping assembly;

[0012] The positioning member is connected to the first connecting member and is configured to position the center line of the product.

[0013] As an alternative solution, the clamping assembly includes at least three jaws. The at least three jaws are evenly distributed circumferentially along the first connecting member. Each jaw is rotatably connected to the second end of the link assembly. The rotation of the link assembly can drive the jaws to move synchronously and clamp the product.

[0014] As an alternative solution, the positioning member is configured as a disc-shaped positioning member. The disc-shaped positioning member is collinear with the central axis of the first connecting member. Four scribing holes are symmetrically arranged at the center of the disc-shaped positioning member. The positions of the four scribing holes correspond to the position of the center line of the product.

[0015] As an alternative solution, the positioning member is configured as a cross-shaped positioning member. The cross-shaped positioning member includes four positioning shafts. The four positioning shafts are symmetrically distributed with the geometric center of the cross-shaped positioning member as the reference. The positions of the four positioning shafts correspond to the position of the center line of the product.

[0016] As an alternative solution, the clamping and positioning device further includes a fixed shaft. A first through hole is opened at the center point of the positioning member. The fixed shaft passes through the first through hole and is connected to the center point of the first connecting member. The positioning member can rotate around the fixed shaft.

[0017] As an alternative solution, the clamping and positioning device further includes a limiting member. The limiting member is arranged on the fixed shaft and is configured to limit the axial displacement of the positioning member along the fixed shaft.

[0018] As an alternative solution, the base frame includes a second connecting member and a hollow rod. The first end of the link assembly is connected to the second connecting member. The hollow rod is connected to the second connecting member. A second through hole is provided at the center point of the second connecting member. The sliding rod is slidably arranged in the hollow rod. The end of the sliding rod passes through the second through hole and is connected to the first connecting member.

[0019] As an alternative solution, the clamping and positioning device further includes an elastic member. The two ends of the elastic member are respectively connected to or abutted against the first connecting member and the second connecting member.

[0020] As an alternative solution, a long circular hole is provided on the side wall of the hollow rod along the axial direction of the hollow rod. The linkage assembly further includes a handle. The handle passes through the long circular hole and can reciprocate along the axial direction of the hollow rod. One end of the sliding rod is connected to the handle, and the other end is connected to the first connecting member.

[0021] As an alternative solution, the base frame further includes a grip. The grip is connected to the end of the hollow rod away from the second connecting member.

[0022] Beneficial effects:

[0023] The present invention provides a clamping and positioning device. When the clamping and positioning device works, a sliding rod slides in a base frame, driving a first connecting member connected thereto to move. The movement of the first connecting member causes a link assembly to rotate around its rotational connection point with the base frame, thereby driving a clamping assembly disposed on the first connecting member to move, realizing clamping or loosening of a product, and a positioning member connected to the first connecting member positions the center line of the product. This clamping and positioning device improves the accuracy of positioning the center line of the product, facilitates subsequent processing operations on the product, and improves production efficiency and product quality. Description of the drawings

[0024] Figure 1 is the first schematic diagram of the clamping and positioning device provided by an embodiment of the present invention;

[0025] Figure 2 is the second schematic diagram of the clamping and positioning device provided by an embodiment of the present invention.

[0026] In the figure:

[0027] 1. Base frame; 11. Second connecting member; 12. Hollow rod; 121. Long circular hole; 13. Handle;

[0028] 2. Linkage assembly; 21. First connecting member; 22. Handle;

[0029] 3. Link assembly; 31. Link rod;

[0030] 4. Clamping assembly; 41. Claw; 411. First rod; 412. Second rod; 413. Third rod; 414. Fourth rod;

[0031] 5. Positioning member; 51. Marking hole;

[0032] 6. Elastic member. Detailed implementation manners

[0033] The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. In addition, it should be noted that for the sake of description, only parts related to the present invention rather than all structures are shown in the drawings.

[0034] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0035] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath", and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0036] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0037] This embodiment discloses a clamping and positioning device, as Figure 1 - Figure 2 shown. The clamping and positioning device includes a base frame 1, a linkage assembly 2, a link assembly 3, a clamping assembly 4, and a positioning member 5. The linkage assembly 2 includes a sliding rod and a first connecting member 21. At least part of the sliding rod is slidably disposed in the base frame 1, and the end of the sliding rod is connected to the first connecting member 21. The movement of the sliding rod can drive the movement of the first connecting member 21. The first end of the link assembly 3 is rotatably connected to the base frame 1. The clamping assembly 4 is disposed on the first connecting member 21. The second end of the link assembly 3 is rotatably connected to the clamping assembly 4. The movement of the first connecting member 21 can drive the rotation of the link assembly 3, and further drive the movement of the clamping assembly 4. The clamping assembly 4 can selectively clamp or release the product. The central axis of the first connecting member 21 and the central axis of the product are both collinear with the central axis of the clamping area of the clamping assembly 4. The positioning member 5 is connected to the first connecting member 21, and the positioning member 5 is used to position the center line of the product.

[0038] When the clamping and positioning device provided in this embodiment is working, the sliding rod slides within the base frame 1, driving the movement of the first connecting member 21 connected thereto. The movement of the first connecting member 21 causes the link assembly 3 to rotate around its rotational connection point with the base frame 1, thereby driving the movement of the clamping assembly 4 provided on the first connecting member 21 to clamp or release the product. The positioning member 5 connected to the first connecting member 21 positions the center line of the product. This clamping and positioning device can accurately clamp and position the center line of the product, improve the positioning accuracy, facilitate subsequent processing operations, and enhance production efficiency and product quality.

[0039] In this embodiment, the product can be a crystal bar, and the clamping and positioning device can accurately position the center line position of the cross-section of the crystal bar. The diameter of the crystal bar can be 200 ± 10 mm or 300 ± 10 mm, etc.

[0040] In other embodiments, the diameter of the crystal bar can also be 50 ± 10 mm, 100 ± 10 mm, 150 ± 10 mm, 250 ± 10 mm, 350 ± 10 mm, 400 ± 10 mm, etc. There is no specific limitation here, and the actual size of the clamping and positioning device can be changed according to the actual situation to adapt to the center line positioning work of crystal bars of different sizes.

[0041] As Figure 1 - Figure 2 shown, the clamping assembly 4 includes at least three jaws 41. The at least three jaws 41 are evenly distributed along the circumferential direction of the first connecting member 21. The jaws 41 are all rotatably connected to the second end of the link assembly 3. The rotation of the link assembly 3 can drive the jaws 41 to move synchronously and clamp the product. The clamping force can be evenly applied to the product from multiple directions, so that the product is evenly stressed when being clamped, effectively avoiding deformation or displacement caused by uneven stress, ensuring the stability of the product during operations such as processing and positioning. Whether it is a circular or square product, accurate and firm clamping can be achieved, laying a foundation for the smooth progress of subsequent processes.

[0042] In this embodiment, the first connecting member 21 is constructed as a first cross bar that is centrally symmetrical and axially symmetrical, that is, the angle between any two rods in the first cross bar is 90 degrees, and the clamping assembly 4 includes four clamping claws 41, which are respectively connected to the four ends of the first cross bar, the first end of the connecting rod assembly 3 is rotatably connected to the base frame 1, and the four clamping claws 41 are respectively rotatably connected to the second end of the connecting rod assembly 3. The movement of the first connecting member 21 can drive the connecting rod assembly 3 to rotate, and drive the four clamping claws 41 to move synchronously, thereby clamping the product. Due to the symmetrical characteristics of the first cross bar, when the sliding rod drives the first connecting member 21 to move and drives the connecting rod assembly 3 to rotate, the four clamping claws 41 can move synchronously to ensure that the force applied to the product in all directions is uniform. In addition, the central axis of the first connecting member 21, the central axis of the product and the central axis of the clamping area of ​​the clamping assembly 4 are collinear, which further improves the accuracy of positioning and clamping, effectively avoids the deviation or shaking of the product during the processing, and greatly improves the consistency and stability of product processing.

[0043] In other embodiments, the first connecting member 21 is a centrosymmetric three-rod bracket, that is, the angle between any two rods in the three-rod bracket is 180 degrees, the clamping assembly 4 includes three clamping claws 41, the three clamping claws 41 are respectively connected to the three ends of the three-rod bracket, the first end of the connecting rod assembly 3 is rotatably connected to the base frame 1, and the three clamping claws 41 are respectively rotatably connected to the second end of the connecting rod assembly 3, and the movement of the first connecting member 21 can drive the connecting rod assembly 3 to rotate, drive the three clamping claws 41 to move synchronously, and then clamp the product. Due to the centrosymmetric characteristic of the 180-degree angle between any two rods in the three-rod bracket, when the sliding rod drives the first connecting member 21 to move and drives the connecting rod assembly 3 to rotate, the three clamping claws 41 can move synchronously to ensure uniform force on the product. At the same time, the central axis of the first connecting member 21, the central axis of the product and the central axis of the clamping area of ​​the clamping assembly 4 are collinear, which greatly improves the accuracy of positioning and clamping, effectively prevents the product from being offset or shaking during processing, effectively guarantees the consistency and stability of product processing, and provides solid support for product processing quality.

[0044] In some further embodiments, the first connecting member 21 may be a centrally symmetrical five-rod bracket, that is, the angle between any two rods in the five-rod bracket is 72 degrees. Correspondingly, the clamping assembly 4 includes five clamping jaws 41, and the clamping jaws 41 may be evenly distributed along the circumference of the first connecting member 21, without being specifically limited here.

[0045] like Figure 1As shown in the figure, in this embodiment, the jaw 41 is configured as a parallelogram jaw. The parallelogram jaw includes two four-bar linkages. The four-bar linkage includes a first rod 411, a second rod 412, a third rod 413, a fourth rod 414 and a connecting shaft. The first rod 411, the second rod 412, the third rod 413 and the fourth rod 414 are hinged in sequence. The first rod 411 and the fourth rod 414 are hinged to enclose a parallelogram. Among them, the first rod 411 is always parallel to the third rod 413, and the second rod 412 is always parallel to the fourth rod 414. The two four-bar linkages are connected by a connecting shaft to form a parallelogram jaw. The two first rods 411 of the parallelogram jaw are fixedly connected to both sides of any one of the four ends of the first cross-bar. Each rod in the four-bar linkage is hinged in sequence to form a parallelogram. The first rod 411 is always parallel to the third rod 413, and the second rod 412 is always parallel to the fourth rod 414, so that the jaw 41 can apply force to the product evenly during operation. The two four-bar linkages are connected by a connecting shaft and work together, enhancing the clamping force and stability. The accuracy and synchronization of the clamping action are improved throughout the process.

[0046] As Figure 1 shown, the link assembly 3 includes eight linkage rods 31. The eight linkage rods 31 are divided into four groups. Every two linkage rods 31 form a group. The two first ends of the two linkage rods 31 in a group are both rotatably connected to the base frame 1. The two second ends of the two linkage rods 31 in a group are respectively rotatably connected to the two second rods 412 of the parallelogram jaw. When the first cross-bar drives the jaw 41 to move, the eight linkage rods 31 of the four groups work together to ensure that the force on the jaw 41 in all directions is more balanced, greatly improving the stability of the movement of the jaw 41. At the same time, the precise connection method of the linkage rod 31 with the base frame 1 and the jaw 41 ensures the accuracy and synchronization of the clamping action, providing a solid guarantee for the stable processing of the product.

[0047] In other embodiments, the jaw 41 can be a suction cup type jaw. The suction cup type jaw uses the principle of vacuum adsorption and can gently and firmly grasp the product. Its adsorption surface can fit the surfaces of products of various shapes, especially suitable for fragile, thin or relatively smooth-surfaced products. Through the adsorption force, it can effectively avoid scratching and damaging the product surface, and can accurately cooperate with the docking of the positioning member 5 and the positioning groove of the product, easily completing the positioning marking work, greatly improving the yield rate of product positioning and processing, and providing strong support for the production of high-quality products.

[0048] In some other embodiments, the jaw 41 can also be a magnetic adsorption jaw. By virtue of magnetic adsorption, it can quickly grasp magnetic or magnetizable products. The operation is simple and the clamping is completed instantly, greatly reducing the operation time and significantly improving the work efficiency. When cooperating with the positioning member 5, the magnetic adsorption jaw firmly adsorbs the product, ensuring the stable position of the product and ensuring that the scribing hole 51 of the positioning member 5 can accurately dock with the product positioning groove, so that the operator can successfully complete the marking. The type of the jaw 41 is not specifically limited herein.

[0049] In this embodiment, the surface of the jaw 41 is made of non-metallic PVC material. The PVC material is soft in texture and can effectively avoid scratching and abrasion of the product surface when clamping the product, especially suitable for products with high surface quality requirements. In other embodiments, the surface material of the jaw 41 can also be selected from nylon, rubber, aluminum alloy, stainless steel, etc., which is not specifically limited herein.

[0050] It is worth noting that in this embodiment, the four jaws 41 are completely identical and apply equal clamping forces. The first connecting member 21 is a first cross bar that is centrosymmetric and axially symmetric, that is, the central axis of the clamping area of the clamping assembly 4 coincides with the central axis of the first connecting member 21, and the central axis of the clamping area of the clamping assembly 4 coincides with the central axis of the product. That is, when the clamping assembly 4 clamps the product, the central axis of the first connecting member 21 coincides with the central axis of the product.

[0051] As Figure 2 shown, the positioning member 5 is configured as a disc-shaped positioning member, and the disc-shaped positioning member is collinear with the central axis of the first connecting member 21. Four scribing holes 51 are provided on the positioning member 5 in a centrosymmetric manner, and the positions of the four scribing holes 51 correspond to the center line position of the product. The disc-shaped positioning member can rotate relative to the product, and any scribing hole 51 can be flexibly corresponded to the product positioning groove. With the help of the other three scribing holes 51, the center line of the product can be accurately positioned. This design greatly improves the flexibility and accuracy of positioning, provides an accurate reference for subsequent processing, effectively improves the product processing quality, significantly improves the production efficiency, and reduces the occurrence of defective products caused by positioning deviation.

[0052] In other embodiments, the positioning member 5 is configured as a cross-shaped positioning member. The cross-shaped positioning member includes four positioning shafts. The four positioning shafts are centrosymmetrically distributed with the geometric center of the cross-shaped positioning member as the reference, and the positions of the four positioning shafts correspond to the center line position of the product. When the clamping assembly 4 clamps the product, the central axis of the cross-shaped positioning member and the central axis of the product are in the same position, that is, the positions of the four positioning shafts and the center line of the product are in the same position. Select one of the positioning shafts of the cross-shaped positioning member and define this positioning shaft as the first positioning shaft. Rotate the cross-shaped positioning member so that one side of the first positioning shaft corresponds to the product positioning groove. The operator marks on the product at the positions where the other three positioning shafts are on the same side as the first positioning shaft to position the center line of the product.

[0053] In this embodiment, the positioning member 5 can rotate relative to the first connecting member 21. By rotating the disc-shaped positioning member, any one of the marking holes 51 can be aligned with the positioning groove of the product. The operator inserts a pen into the other three marking holes 51 to mark on the product, and thus can quickly locate the center line of the product, improving the convenience of operation and contributing to the improvement of production efficiency.

[0054] In other embodiments, the positioning member 5 is fixedly arranged on the first connecting member 21. By adjusting the position of the entire clamping and positioning device, any one of the marking holes 51 can be aligned with the positioning groove of the product. The operator inserts a pen into the other three marking holes 51 to mark on the product, and can also quickly locate the center line of the product. Specific limitations are not made here.

[0055] In this embodiment, the disc is made of non-metallic PVC material, which has a certain flexibility. Compared with metal materials, it can reduce the wear and damage generated during collisions, reduce the maintenance cost, extend the service life of the disc, and ensure the reliable operation of the entire clamping and positioning device.

[0056] As Figure 1 shown, the clamping and positioning device further includes a fixed shaft (not shown in the figure). A first through hole is opened at the center point of the positioning member 5. The fixed shaft passes through the first through hole and is connected to the center point of the first connecting member 21. The positioning member 5 can rotate around the fixed shaft. The fixed shaft passes through the first through hole at the center point of the positioning member 5 and is connected to the center point of the first connecting member 21, endowing the positioning member 5 with the ability to rotate around the fixed shaft. When the clamping assembly 4 clamps the product, the central axes of the positioning member 5, the first connecting member 21 and the product coincide. The four marking holes 51 that are centrosymmetric on the positioning member 5 correspond to the position of the center line of the product. By rotating the positioning member 5 around the fixed shaft, any one of the marking holes 51 can be easily and accurately aligned with the positioning groove of the product. The operator can quickly mark the center line on the product through the other three marking holes 51, greatly improving the production efficiency, ensuring the accurate positioning of the product, and providing a reliable reference for subsequent processing.

[0057] In this embodiment, the fixed shaft is made of 306 stainless steel material. The stainless steel material has high strength and good toughness, can withstand large loads and torques, and can maintain good rigidity during the rotation of the positioning member 5, avoiding conditions such as deformation and fracture due to stress, and effectively ensuring the structural reliability of the entire clamping and positioning device.

[0058] As Figure 1As shown, the clamping and positioning device further includes a limiting member (not shown in the figure). The limiting member is arranged on the fixed shaft and is configured to limit the displacement of the positioning member 5 along the axial direction of the fixed shaft. The limiting member can effectively limit the displacement of the positioning member 5 along the axial direction of the fixed shaft, ensuring the position stability of the positioning member 5 during use. In actual operation, when the positioning member 5 rotates around the fixed shaft for positioning work, it will not affect the positioning accuracy due to axial movement, so that the marking hole 51 on the positioning member 5 can accurately align with the positioning groove of the product, thereby ensuring that the operator can accurately mark the center line of the product through the positioning member 5, improving the reliability and accuracy of the entire positioning process.

[0059] As Figure 1 shown, the base frame 1 includes a second connecting member 11 and a hollow rod 12. The first end of the link assembly 3 is connected to the second connecting member 11, and the hollow rod 12 is connected to the second connecting member 11. A second through hole (not shown in the figure) is provided at the center point of the second connecting member 11. The sliding rod is slidably arranged in the hollow rod 12, and the end of the sliding rod passes through the second through hole and is connected to the first connecting member 21. The hollow rod 12 provides a precise sliding track for the sliding rod, enabling it to slide smoothly inside. The end of the sliding rod passes through the second through hole at the center point of the second connecting member 11 and is connected to the first connecting member 21. This structure ensures that the force conduction during the movement of the sliding rod is direct and efficient, effectively avoiding energy loss, and improving the stability and reliability of the entire clamping and positioning device, laying a solid foundation for the clamping component 4 to accurately and stably clamp the product and the high-quality processing of the product.

[0060] In this embodiment, the second connecting member 11 is a second cross-shaped member that is centrosymmetric and axially symmetric. The link assembly 3 includes eight link rods 31. The eight link rods 31 are divided into four groups, with every two link rods 31 as a group. The two first ends of the two link rods 31 in a group are respectively rotatably connected to both sides of any one of the four ends of the second cross-shaped member, and the two second ends of the two link rods 31 in a group are respectively rotatably connected to the two second rods 412 of the parallelogram claw. When the sliding rod drives the first connecting member 21 to move, the link rods 31 can accurately and synchronously transmit power, prompting the parallelogram claw to act stably, ensuring uniform clamping force and accurate position for the product, providing a solid guarantee for the high-quality processing of the product, and effectively improving the stability and reliability of the clamping and positioning device.

[0061] In other embodiments, the second connecting member 11 can also be a disc-shaped connecting member, and connection points are equidistantly arranged on the edge of the disc-shaped connecting member and connected to the link rods 31. The centrosymmetric characteristic of the disc-shaped connecting member is beneficial to evenly disperse the force, which is not specifically limited here.

[0062] As Figure 1As shown, the clamping and positioning device further includes an elastic member 6, and two ends of the elastic member 6 are respectively connected to or abutted against the first connecting member 21 and the second connecting member 11. On the one hand, when the sliding rod drives the first connecting member 21 to move to control the action of the clamping assembly 4, the elastic member 6 can buffer the impact force during this process, avoid the severe vibration caused by rigid movement from being transmitted to the product, thereby preventing product damage. At the same time, during the clamping process, the elastic member 6 can adaptively fine-tune the clamping force according to the actual shape and size of the product to ensure that the product is always stably clamped, improving the reliability and applicability of the entire clamping and positioning device. On the other hand, when it is necessary to release the product by the clamping assembly 4, the elastic member 6 can push the first connecting member 21 to reset, facilitating the clamping of the product next time.

[0063] In this embodiment, the elastic member 6 is sleeved on the sliding rod, one end of the spring is connected to or abutted against the first connecting member 21, and the other end of the elastic member 6 is connected to or abutted against the second connecting member 11. The sliding rod provides an accurate axial guide for the elastic member 6 during the telescopic deformation process, effectively preventing the elastic member 6 from being laterally offset or twisted due to uneven force, ensuring that the elastic force can act stably and evenly between the first connecting member 21 and the second connecting member 11.

[0064] In other embodiments, the clamping and positioning device may further include a plurality of elastic members 6, the plurality of elastic members 6 are arranged between the first connecting member 21 and the second connecting member 11 and are arranged around the sliding rod, which can also ensure that the elastic force acts stably and evenly between the first connecting member 21 and the second connecting member 11, and no specific limitation is made here.

[0065] As Figure 1 shown, a long circular hole 121 is axially provided on the side wall of the hollow rod 12 along the axis of the hollow rod 12. The linkage assembly 2 further includes a handle 22, the handle 22 passes through the long circular hole 121 and can reciprocate along the axis of the hollow rod 12. One end of the sliding rod is connected to the handle 22, and the other end is connected to the first connecting member 21. The handle 22 passes through the long circular hole 121 and can reciprocate along the axis of the hollow rod 12. The sliding rod slides in the hollow rod 12. One end of the sliding rod is connected to the handle 22, and the other end of the sliding rod is connected to the first connecting member 21, so that the movement of the handle 22 can be accurately transmitted to the first connecting member 21, with simple and efficient operation, improving the practicability of the clamping and positioning device.

[0066] As Figure 1As shown in the figure, the base frame 1 further includes a grip 13, and the grip 13 is connected to one end of the hollow rod 12 away from the second connecting member 11. On the one hand, the grip 13 is used in cooperation with the handle 22, which facilitates the movement of the handle 22 to slide the sliding rod within the hollow rod 12, and drives the first connecting member 21 connected to the sliding rod to move relative to the second connecting member 11, so as to drive the clamping assembly 4 to move and easily clamp or release the product, improving the work efficiency, increasing the controllability of the clamping and positioning device, and ensuring the smooth progress of the clamping and positioning work. On the other hand, it provides a stable holding part for the operator, and the operator can easily and flexibly move the entire clamping and positioning device through the grip 13.

[0067] In summary, the working process of the clamping and positioning device is generally as follows:

[0068] (1) The operator holds the grip 13 with one hand and pulls the handle 22 at the same time, so that the handle 22 drives the sliding rod to slide within the hollow rod 12, driving the first cross member to move, the second cross member remains stationary, the link assembly 3 rotates relative to the second cross member, and drives the four jaws 41 to move synchronously to an open state;

[0069] (2) Move the clamping and positioning device close to the product to be clamped and positioned, align the four jaws 41 with the product, release the handle 22, and the elastic member 6 provided between the first cross member and the second cross member actively pushes the first cross member to move, driving the four jaws 41 to move to a tightened state to clamp the product;

[0070] (3) Rotate the positioning member 5 so that any one of the drawing holes 51 on the positioning member 5 corresponds to the positioning groove of the product. The operator inserts a pen into the other three drawing holes 51 to mark on the product, quickly completing the positioning of the center line of the product;

[0071] (4) Pull the handle 22 again, so that the four jaws 41 move synchronously to an open state to release the product, completing one clamping and positioning operation.

[0072] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. A clamping and positioning device, characterized in that: include: Base frame (1); A linkage assembly (2) comprising a sliding rod and a first connecting member (21), wherein at least a portion of the sliding rod is slidably disposed in the base frame (1), and an end of the sliding rod is connected to the first connecting member (21), and movement of the sliding rod can drive movement of the first connecting member (21); A connecting rod assembly (3), wherein a first end of the connecting rod assembly (3) is rotatably connected to the base frame (1); A clamping assembly (4) is arranged on the first connecting member (21); the second end of the connecting rod assembly (3) is rotatably connected to the clamping assembly (4); the movement of the first connecting member (21) can drive the connecting rod assembly (3) to rotate, thereby driving the clamping assembly (4) to move; the clamping assembly (4) can selectively clamp or release the product; the central axis of the first connecting member (21) and the central axis of the product are both colinear with the central axis of the clamping area of ​​the clamping assembly (4); A positioning member (5), the positioning member (5) is connected to the first connecting member (21), and the positioning member (5) is configured to locate the center line of the product.

2. The clamping and positioning device according to claim 1, characterized in that: The clamping assembly (4) comprises at least three clamping jaws (41), and the at least three clamping jaws (41) are evenly distributed along the circumference of the first connecting member (21). The clamping jaws (41) are all rotatably connected to the second end of the connecting rod assembly (3), and the rotation of the connecting rod assembly (3) can drive the clamping jaws (41) to move synchronously and clamp the product.

3. The clamping and positioning device according to claim 1, characterized in that: The positioning member (5) is constructed as a disc-shaped positioning member, the disc-shaped positioning member and the central axis of the first connecting member (21) are colinear, and four marking holes (51) are centrally symmetrically provided on the disc-shaped positioning member, and the positions of the four marking holes (51) correspond to the centerline positions of the product.

4. The clamping and positioning device according to claim 1, characterized in that: The positioning member (5) is constructed as a cross positioning member, and the cross positioning member includes four positioning axes. The four positioning axes are distributed in a centrally symmetrical manner with the geometric center of the cross positioning member as a reference, and the positions of the four positioning axes correspond to the centerline positions of the product.

5. The clamping and positioning device according to claim 1, characterized in that: The clamping and positioning device also includes a fixed shaft, a first through hole is opened at the center point of the positioning member (5), the fixed shaft passes through the first through hole and is connected to the center point of the first connecting member (21), and the positioning member (5) can rotate around the fixed shaft.

6. The clamping and positioning device according to claim 5, characterized in that: The clamping and positioning device further comprises a limiting member, which is arranged on the fixed shaft and is configured to limit the displacement of the positioning member (5) along the axial direction of the fixed shaft.

7. The clamping and positioning device according to any one of claims 1 to 6, characterized in that: The base frame (1) comprises a second connecting member (11) and a hollow rod (12); the first end of the connecting rod assembly (3) is connected to the second connecting member (11); the hollow rod (12) is connected to the second connecting member (11); a second through hole is provided at the center point of the second connecting member (11); the sliding rod is slidably arranged in the hollow rod (12); the end of the sliding rod is penetrated by the second through hole and is connected to the first connecting member (21).

8. The clamping and positioning device according to claim 7, characterized in that: The clamping and positioning device further comprises an elastic member (6), two ends of which are respectively connected to or abutted against the first connecting member (21) and the second connecting member (11).

9. The clamping and positioning device according to claim 7, characterized in that: An oblong hole (121) is provided on the side wall of the hollow rod (12) along the axial direction of the hollow rod (12); the linkage assembly (2) further comprises a handle (22), the handle (22) passes through the oblong hole (121) and is capable of reciprocating along the axial direction of the hollow rod (12); one end of the sliding rod is connected to the handle (22), and the other end is connected to the first connecting member (21).

10. The clamping and positioning device according to claim 7, characterized in that: The base frame (1) further comprises a handle (13), wherein the handle (13) is connected to an end of the hollow rod (12) away from the second connecting member (11).

Images