Clamp holder and machining equipment
By employing a wave-shaped elastic rib and an arc-shaped groove structure in the micro drill bit holder, the problem of easy breakage of existing holders has been solved, resulting in a longer service life and clamping accuracy, and adapting to diverse workpiece requirements.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-31
- Publication Date
- 2026-03-13
AI Technical Summary
Existing micro drill bit holder structures are prone to breakage due to short deformation rib length and insufficient thickness, which increases product usage costs and makes it difficult to reduce costs.
The design employs a wave-shaped second elastic rib, combined with an arc-shaped groove and a symmetrical deformation groove structure, to increase the elastic deformation length and appropriately thicken it, providing greater stiffness to reduce fatigue damage.
It extends the service life of the gripper, improves gripping stability and accuracy, reduces maintenance frequency, and adapts to diverse gripping needs.
Smart Images
Figure CN121649900A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of clamping device technology, specifically relating to a clamping device and processing equipment. Background Technology
[0002] In modern precision manufacturing, such as electronic chip manufacturing and precision medical device processing, micro drills are widely used as key machining tools for machining tiny holes. Micro drills typically have a diameter between 0.05 and 1 mm, and due to their extremely small size, the clamping mechanism requires very high precision during machining.
[0003] When grinding micro-drill bits to a point, grippers fixed to a clamping mechanism are needed for fixation to prevent the micro-drill bit from deviating from its original position due to deformation of the tip during grinding, which could lead to significant machining deviations. Currently used clamps are of a one-piece structure with grooves for deformation. Existing grooves are mostly irregular; some improvements use symmetrical grooves, but because the deformation ribs in the grooves are short and cannot be made thick, they are prone to breakage during use. The overall average cost of the clamp is relatively high, hindering cost reduction. Therefore, a new structure is being explored to modify the deformation ribs and extend the normal service life of the clamp. Summary of the Invention
[0004] In view of the problems raised in the background art above, the object of the present invention is to provide a clamp and processing equipment.
[0005] To achieve the above-mentioned technical objectives, the technical solution adopted by the present invention is as follows: A gripper includes a telescopic part connected to a drive mechanism. A swinging part is symmetrically mounted on the upper end of the telescopic part. Two symmetrical output ends of the swinging parts form a clamping opening. When the telescopic part moves, the clamping opening expands or clamps. The middle area of the swinging part is a mating part. The mating part has a positioning hole and two sets of first and second deformation grooves symmetrically arranged in a cross shape. A first elastic rib is formed between the two sides of the first deformation groove on the upper side and between the second deformation groove. A second elastic rib is formed between the two sides of the first deformation groove on the lower side and between the second deformation groove. The second elastic rib is wavy. Both the first and second elastic ribs are integrally formed with the swinging part.
[0006] A processing device, including a clamp.
[0007] Further specifying, the second elastic rib has at least three bends.
[0008] Furthermore, the swinging part is provided with several mounting holes on both sides of the clamping opening.
[0009] Furthermore, the opening ends of the first deformation groove and the second deformation groove are both oriented toward the center of the mating part, and the opening ends of the first deformation groove and the second deformation groove are connected to an arc-shaped groove.
[0010] Further defined, the first deformation groove located on the upper side is connected to the clamping port, the first deformation groove located on the lower side is connected to the telescopic part, and the first deformation grooves on both the upper and lower sides are provided with openings at the connection positions.
[0011] Furthermore, the second deformation grooves on the left and right sides are provided with two oblique openings.
[0012] Furthermore, the thickness of the second elastic rib is five millimeters.
[0013] The beneficial effects of using the present invention are as follows: This invention changes the structure of the deformation rib to a wave shape. The overlapping parts of the arc structure increase the length of the elastic deformation, so it is less prone to fatigue damage during the deformation process. At the same time, under this structural premise, appropriately increasing the thickness of the elastic rib or providing greater stiffness can also provide sufficient elasticity, so as to achieve the purpose of providing elasticity while increasing strength and making it less prone to damage. Attached Figure Description
[0014] The present invention can be further illustrated by the non-limiting embodiments given in the accompanying drawings; Figure 1 This is a front view schematic diagram of an embodiment of the clamp and processing equipment of the present invention; Figure 2 This is a schematic diagram of an embodiment of a clamp and processing equipment according to the present invention; The symbols for the main components are explained below: Telescopic part 1; swinging part 2; clamping port 3; mating part 4; positioning hole 5; first deformation groove 6; second deformation groove 7; first elastic rib 8; second elastic rib 9; mounting hole 10; arc groove 11; opening 12; oblique opening 13. Detailed Implementation
[0015] To enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0016] like Figure 1 , Figure 2As shown, a clamp of the present invention includes a telescopic part 1 connected to a drive mechanism. A swing part 2 is symmetrically mounted on the upper end of the telescopic part 1. The output ends of the two symmetrical swing parts 2 form a clamping port 3. When the telescopic part 1 moves, the clamping port 3 expands or clamps. The middle area of the swing part 2 is a mating part 4. The mating part 4 is provided with a positioning hole 5. The mating part 4 is symmetrically provided with two sets of first deformation grooves 6 and second deformation grooves 7 in a cross shape. A first elastic rib 8 is formed on both sides of the first deformation groove 6 and between the second deformation groove 7 on the upper side. A second elastic rib 9 is formed on both sides of the first deformation groove 6 and between the second deformation groove 7 on the lower side. The second elastic rib 9 is wavy. The first elastic rib 8 and the second elastic rib 9 are integrally formed with the swing part 2.
[0017] A processing device, including a clamp.
[0018] In this embodiment, when using a clamp and processing equipment, the clamp is installed at the output end of the drive mechanism of the processing equipment. When the drive mechanism runs, it causes the telescopic part 1 to deform, which in turn causes the swing part to deform, thereby causing the clamping port 3 to move. Specifically, when the telescopic part 1 moves away from the clamping port, the telescopic part 1 deforms, pulling the swing parts 2 at both ends, causing the clamping port 3 to contract inward, thereby achieving the clamping purpose of the clamping port 3. Conversely, when the telescopic part 1 moves closer to the clamping port, the telescopic part 1 deforms, resisting the swing parts 4 at both ends, causing the clamping port 3 to expand outward, thereby achieving the purpose of releasing the clamping port 3. The mating part 4 and the first deformation groove 6 and the second deformation groove 7 on it provide movement space for the movement of the swing part 4, while the first elastic rib 8 and the second elastic rib 9 provide pulling and traction forces, so that the movement of the swing part 2 and the first deformation groove 6 and the second deformation groove 7 will not deviate, ensuring the stability of the clamping. Furthermore, the second elastic rib 9 is designed in a wavy, curved shape. From a structural strength perspective, the wavy design increases the surface area and structural complexity of the component, which can disperse external forces. Just as a tortuous dam is more resistant to water flow than a straight dam, it effectively improves the component's resistance to deformation. When subjected to large external forces or frequent use, it is less likely to be damaged, thus extending the service life of the clamp. Furthermore, with the wavy structure, the thickness of the elastic rib can be appropriately increased or the rigidity of the material can be improved, which can increase strength while providing elasticity, thus achieving the goal of being less prone to damage.
[0019] Based on the above embodiments, it is further preferred that the second elastic rib 9 has at least three bends, adopting a symmetrical "S"-shaped multi-segment bend shape, with the bending angle of each segment controlled between 30° and 60°, the bending radius adapted to the size of the clamping target, and the bending directions of adjacent segments opposite, forming an alternating contour of "convex-concave-convex" or "concave-convex-concave", while ensuring a smooth transition of the overall structure and avoiding stress concentration. Such a structure has a step-like increase in strength. In fact, the number of bending segments of the second elastic rib 9 can also be considered according to specific circumstances.
[0020] Based on the above embodiments, it is further preferred that the swing part 2 has a plurality of mounting holes 10 on both sides of the clamping port 3. The mounting holes 10 can be processed by drilling to ensure that the hole walls are smooth, the perpendicularity meets the standard, and the positional accuracy of the holes is controlled within ±0.1 mm, ensuring the accuracy of installation and significantly enhancing the assembly flexibility of the clamp. By installing bolts, pins and other connecting parts in the mounting holes at different positions, it can be easily connected with various auxiliary claws to adapt to diverse application scenarios. It facilitates later maintenance and component replacement. When a part of the structure of the swing part 2 or a component connected to it is damaged, the mounting holes can be used to quickly disassemble and replace the corresponding parts, reducing downtime and improving the overall operating efficiency of the equipment. Furthermore, it can facilitate personalized modification according to different clamping tasks, such as adding buffer pads or adjusting the clamping range extension parts, which can be achieved simply by using the mounting holes, effectively improving the versatility and applicability of the clamp. In fact, the number and position of the mounting holes 10 can also be considered according to specific circumstances.
[0021] Based on the above embodiments, it is further preferred that the opening ends of the first deformation groove 6 and the second deformation groove 7 both face the center of the mating part 4. The opening ends of the first deformation groove 6 and the second deformation groove 7 are connected to an arc-shaped groove 11. The first deformation groove 6 and the second deformation groove 7 are symmetrically designed and opened on both side walls of the mating part 4, with their opening ends both facing the central axis of the mating part 4, forming an "eight"-shaped dovetail layout. The arc-shaped groove 11 connects to the opening ends of the two deformation grooves, and its radius of curvature is adapted to the width of the deformation groove. The groove body is machined using a milling process to ensure that the groove wall is smooth and burr-free. The connection with the deformation groove is integrally formed with a rounded corner transition. This structure improves the flexibility and controllability of deformation. The central opening layout guides the mating part 4 to contract or open towards the center under stress, while the arc-shaped groove 11 disperses stress through a curved transition, preventing tearing at the groove opening during deformation. This allows the mating part to adapt to the clamping requirements of workpieces of different sizes, expanding the deformation range compared to a straight groove design. It also enhances structural stability; the symmetrical layout combined with the arc transition balances the deformation forces on both sides, preventing force shifting of the mating part. This is especially beneficial in high-frequency clamping operations, reducing component fatigue damage and extending service life. Furthermore, it optimizes clamping accuracy. The "buffer section" formed by the arc-shaped groove 11 weakens the impact force during clamping, preventing workpiece displacement due to rigid contact. This makes it suitable for high-precision applications such as precision instrument assembly and surgical instrument clamping. In practice, the length of the arc-shaped groove 11 can also be considered based on specific circumstances.
[0022] Based on the above embodiment, it is further preferred that the first deformation groove 6 located on the upper side connects to the clamping port 3, and the first deformation groove 6 located on the lower side connects to the telescopic part 1. Openings 12 are provided at the connecting positions on both the upper and lower sides of the first deformation groove 6 to ensure that the deformation force can be directly transmitted to the telescopic structure. The openings 12 at the two connecting positions have a diameter set to 1.5 to 2 times the width of the deformation groove to ensure a smooth transition between the hole wall and the groove wall, thus constructing a stepped deformation transmission path. The upper groove connecting to the clamping port 3 allows the clamping action to directly drive the deformation, while the lower groove connecting to the telescopic part 1 links the telescopic movement with the deformation, in conjunction with the openings 12. The dispersion effect of concentrated stress improves the overall deformation response speed and reduces the risk of fracture at the connecting parts. The opening 12 replaces the right-angle corner, eliminating stress concentration points. Fatigue tests show that its fracture life is effectively extended compared to the design without holes. Furthermore, it can improve the size adaptation compatibility. The separate connection of the upper and lower slots allows the opening and closing range of the clamping port 3 and the stroke of the telescopic part 1 to be coordinated and adjusted. Combined with the micro-deformation redundancy brought by the opening 12, it can adapt to workpieces within the deviation of the design size, and is especially suitable for batch clamping scenarios of multi-specification parts. In fact, the size of the opening 12 can also be considered according to the specific situation.
[0023] Based on the above embodiments, it is further preferred that the second deformation groove 7 on the left and right sides is provided with two oblique openings 13. The opening direction is at an angle of 30° to 45° with the deformation groove body, and the upper and lower openings are inclined in opposite directions. The upper opening is inclined outward and the lower opening is inclined inward. The opening edges are rounded to maintain a smooth transition at the connection with the deformation groove body. This structure expands the deformation adjustment range. The two oppositely inclined openings can guide the second deformation groove 7 to generate multi-directional micro-deformation when subjected to force, which increases the lateral extension and contraction amplitude of the swing part 2 compared with the design without openings. It can adapt to the clamping needs of more irregularly shaped workpieces and optimizes the stress dispersion path. The oblique openings break the straight stress transmission of the groove body and decompose the concentrated stress into a component force along the inclined direction. With the rounded transition, the risk of groove cracking can be reduced. Its fatigue resistance has been improved after testing. In fact, the length of the oblique opening 13 can also be considered according to the specific situation.
[0024] Based on the above embodiments, it is further preferred that the thickness of the second elastic rib 9 is five millimeters. The second elastic rib 9 adopts an integrated processing technology with the mating part 4. This process can be achieved by stamping or milling. The second elastic rib 9 is adapted to the second deformation grooves 7 on both sides and the oblique opening 13 to ensure elastic movement space during deformation. At the same time, the connection between the two ends of the rib and the main structure of the mating part 4 is rounded to avoid stress concentration caused by abrupt changes in thickness. This structural design balances elasticity and load-bearing capacity. The 5mm thickness ensures that the rib has sufficient elastic deformation margin. The uniform thickness makes the deformation curve of the rib more regular when under force. With the guiding effect of the second deformation groove 7, better displacement control accuracy can be achieved, which is suitable for operations with strict requirements on clamping position. It also enhances the structural durability. The 5mm thickness can withstand more reciprocating deformations after fatigue testing. With the seamless design of integrated processing, its service life is extended compared with thinner elastic ribs, reducing the maintenance frequency. In fact, the thickness of the second elastic rib 9 can also be considered according to specific circumstances.
[0025] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.
Claims
1. A gripper, comprising a telescopic part (1) connected to a drive mechanism, wherein swing parts (2) are symmetrically mounted on the upper end of the telescopic part (1), the output ends of the two symmetrical swing parts (2) form a gripping opening (3), and the middle region of the swing parts (2) is a mating part (4), wherein the mating part (4) is provided with a positioning hole (5), characterized in that: The mating part (4) is symmetrically provided with two sets of first deformation grooves (6) and second deformation grooves (7) in a cross shape. A first elastic rib (8) is formed between the two sides of the first deformation groove (6) on the upper side and between the second deformation groove (7). A second elastic rib (9) is formed between the two sides of the first deformation groove (6) on the lower side and between the second deformation groove (7). The second elastic rib (9) is wavy.
2. The clamping device according to claim 1, characterized in that: The second elastic rib (9) has at least three bends.
3. The clamping device according to claim 2, characterized in that: The swing part (2) has several mounting holes (10) on both sides of the clamping port (3).
4. A clamping device according to claim 3, characterized in that: The opening ends of the first deformation groove (6) and the second deformation groove (7) are both facing the center of the mating part (4), and the opening ends of the first deformation groove (6) and the second deformation groove (7) are connected to an arc groove (11).
5. A clamping device according to claim 4, characterized in that: The first deformation groove (6) located on the upper side is connected to the clamping port (3), and the first deformation groove (6) located on the lower side is connected to the telescopic part (1). The first deformation groove (6) on both the upper and lower sides is provided with an opening (12) at the connection position.
6. A clamping device according to claim 5, characterized in that: The second deformation groove (7) on the left and right sides is provided with two oblique openings (13).
7. A clamping device according to claim 6, characterized in that: The thickness of the second elastic rib (9) is five millimeters.
8. A processing equipment, characterized in that, Includes the gripper as described in any one of claims 1 to 7.