An automatic rotating clamping mechanism

Abstract

The application discloses an automatic rotating clamping mechanism and relates to the related technical field of clamping mechanisms. The automatic rotating clamping mechanism comprises a clamping mechanism, a steel ball rolling groove plate which can be connected with a target object, a plurality of slidable steel balls arranged in the steel ball rolling groove plate in the circumferential direction of the target object, and the steel ball rolling groove plate can drive the steel balls to clamp and rotate the target object under the action of centrifugal force. The automatic rotating clamping mechanism is applied to the scene where the clamping mechanism needs to clamp and rotate. In the application, the clamping part on the target object is designed in a cylindrical structure, when the target object needs to be clamped and rotated, the steel balls in the steel ball rolling groove plate can move in the designed track groove by rotating the clamping mechanism, the target object is clamped, and the target object is rotated at a preset rotating speed; when the rotating speed is reduced or stopped, the mechanism can automatically separate from the target object.

Description

Technical Field

[0001] This invention relates to the technical field of clamping mechanisms, and more specifically, to an automatic rotary clamping mechanism. Background Technology

[0002] Currently, in the manufacturing process, there are often mechanisms that require clamping and simultaneous rotation. Traditional rotary clamping mechanisms are often complex in structure, expensive, and require significant manpower for later debugging and use, as well as relatively specialized technical personnel for maintenance. Therefore, this invention designs an automatic rotary clamping mechanism. This clamping mechanism has a simple mechanical structure and can achieve clamping and rotation of the target object by utilizing the principle of centrifugal force. It can save a lot of hardware and installation space, while achieving the goals of reducing costs and improving the mechanism's fault tolerance.

[0003] Chinese Patent Publication No. CN1255238C discloses a clamping mechanism. A power tool includes a motor, a spindle driven by the motor, a rotary cutting tool disposed on the spindle and having a rotation axis, the cutting tool also having a hole, and first and second clamping members connected to the spindle and clamping a saw blade. The cutting tool, at least one of the first and second clamping members, and one of the spindle have a first driving surface that contacts a second driving surface on the other of the cutting tool, at least one of the first and second clamping members, and the spindle. The second driving surface is movable between a first position contacting the first driving surface and a second position passing over the first driving surface. However, this mechanism has the drawback of being unable to clamp and fix target objects in application scenarios requiring both clamping and rotation. Summary of the Invention

[0004] To overcome the shortcomings of the above-mentioned technical problems, the present invention provides an automatic rotary clamping mechanism that can clamp and rotate a target object by means of centrifugal force, saving a lot of mechanical hardware and installation space, while reducing costs and improving the fault tolerance of the mechanism.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: an automatic rotating clamping mechanism, comprising: a clamping mechanism, including a steel ball groove plate through which a target object can be inserted and connected, wherein a plurality of slidable steel balls are provided in the steel ball groove plate circumferentially connected to the target object, and by rotating the steel ball groove plate, the steel balls can be driven to clamp and rotate the target object under the action of centrifugal force.

[0006] This invention provides an automatic rotary clamping mechanism for applications requiring both clamping and rotation. The clamping portion on the target object employs a cylindrical structure. When the target object needs to be clamped and rotated, the clamping mechanism is rotated, causing the steel balls in the ball bearing roller plate to move within the designed track groove, thus clamping the target object and rotating it at a preset speed. When the speed decreases or stops, the mechanism automatically disengages from the target object. This design effectively utilizes the principle of centrifugal force during rotation to achieve both clamping and rotation of the target object. The design is simple, inexpensive, and has significant potential for practical application and future promotion.

[0007] Preferably, the ball bearing grooving plate has circular mounting holes with a diameter larger than the diameter of the target object's cross-section. The inner wall of the mounting holes has several equidistantly arranged track grooves, within which the ball bearings are positioned. This design effectively solves the concentricity requirement of traditional rotary clamping devices, allowing the mechanism to automatically clamp shaft-like parts adaptively within its design range.

[0008] Preferably, the inner wall of the track groove includes a contact edge, a circular arc edge, and a tightening arc edge connected in sequence, enabling the steel ball to simultaneously achieve tangential connection with the target object and the tightening arc edge. This track groove structure effectively improves the rolling efficiency of the steel ball, allowing the steel ball in the mechanism to quickly clamp and rotate the target object under the action of centrifugal force.

[0009] Preferably, the arc-shaped extrusion hole is located near the side of the tightening arc edge. This is the second objective of the invention. The design of this arc-shaped extrusion hole allows the mechanism to contract the tightening arc edge to a certain extent under the extrusion force without changing the rotational speed. This increases the curvature of the tightening arc edge without changing its arc length. Without the arc-shaped extrusion hole, the steel ball, the target object, and the tangent of the tightening arc edge form a first included angle A1. (See attached diagram). Figure 7 The included angle is formed by the connecting lines of the tangents in the middle part; an arc-shaped extrusion hole is set, and the steel ball connects with the target object and the tangent of the tightened arc edge to form a second included angle A2, see appendix. Figure 7 The angle formed by the tangents connecting the dashed section is greater than the first angle A1. This means that after setting the arc-shaped extrusion hole, the angle formed by the connection between the steel ball, the target object, and the tangent of the tightening arc increases when clamping the target object. When the mechanism operates at the same rotational speed, combined with force analysis, it can be concluded that the extrusion force of the steel ball on the target object is significantly increased, thereby improving the clamping strength of the steel ball on the target object. Simultaneously, it allows the steel ball to cover a smaller area, effectively reducing the likelihood of the steel ball dislodging from its original track groove position due to external factors such as vibration, thus preventing the target object from loosening and improving the clamping quality of the clamping mechanism.

[0010] Preferably, there are three track slots, and the track slots are designed with the same shape and orientation. This design ensures the concentricity of the target object after clamping.

[0011] Preferably, there are six track slots in total, and the shapes and directions of two spaced-apart track slots are opposite. This design allows the clamping mechanism to clamp the target object in both forward and reverse directions.

[0012] Preferably, the clamping mechanism also includes an upper fixed plate and a lower fixed plate, with a steel ball groove plate fixedly disposed between the upper and lower fixed plates. The target object passes through the lower fixed plate and the mounting hole sequentially and extends into the upper fixed plate. This design features a simple mechanical mechanism, and when wear occurs, it can be quickly put into use by replacing the standard steel balls.

[0013] Preferably, the steel ball grooving plate has protrusions on its opposite side walls, which are respectively embedded in the mounting grooves in the upper and lower fixed plates. This facilitates quick alignment and installation of the mechanism.

[0014] Preferably, the mounting groove on the side closest to the target object has an inclined contraction surface, thus forming a mounting cavity for mounting the steel ball between the upper and lower mounting grooves and the track groove. This design effectively prevents the steel ball from detaching from the mounting cavity, thus preventing the steel ball from falling out and affecting the normal operation of the mechanism.

[0015] Preferably, the upper fixing plate, the ball bearing groove plate, and the lower fixing plate are fixedly connected by several bolts. This effectively improves the installation strength of the mechanism and facilitates disassembly and assembly.

[0016] Compared with the prior art, the beneficial effects of the present invention are: (1) This design is an automatic rotary clamping mechanism, which is applied in scenarios where objects need to be clamped and rotated; (2) This design makes good use of the principle of centrifugal force during the rotation of the clamping mechanism to clamp the target object; (3) This design solves the requirement of concentricity of traditional rotary clamping devices in use, and the mechanism can automatically clamp shaft parts within the design range; (4) This design is simple and inexpensive, and has great potential for practical use and later promotion; (5) This design can save the cumbersome clamping device, clamping power source device, rotating device, and connecting parts between several devices of the traditional rotary clamping mechanism; (6) When the target object needs to be clamped and rotated, this design only needs to rotate, and the steel balls in the mechanism will move in the designed track groove to achieve the purpose of clamping the target object and rotate at the preset speed; when the speed decreases or stops, the mechanism will automatically disengage from the target object; (7) This design can also meet the requirements of the target object being upright. (8) This design is convenient for later use and maintenance. When the mechanism is worn, it can be put into use quickly by simply replacing the standard steel balls. (9) This design can achieve the function of automatically clamping the target object without the need for other power sources, which is of good significance for energy consumption. (10) This design is small in size and has a large clamping force, which can be flexibly applied in a narrow space. (11) This design avoids the action time of traditional automatic rotating mechanisms during use, and has a fast response speed, which is of great significance for improving the pace. (12) This design is easy to debug. Unlike traditional automatic rotating mechanisms, it does not require a very high degree of concentricity with the target object. As long as the target object is within a certain design range, the mechanism can adapt to different target objects. (13) The design of the arc extrusion hole in this mechanism can change the curvature of the shrinking arc edge without changing the arc length, thereby increasing the clamping strength between the steel ball and the target object. At the same time, the mechanism increases the clamping force on the original target object when the rotation speed is the same. Attached Figure Description

[0017] Figure 1 This is an exploded view of the clamping mechanism in Embodiment 1 of the present invention;

[0018] Figure 2 This is a cross-sectional schematic diagram of the clamping mechanism in Embodiment 1 of the present invention;

[0019] Figure 3 This is a cross-sectional schematic diagram of the steel ball grooving plate in Embodiment 2 of the present invention;

[0020] Figure 4 This is a cross-sectional schematic diagram of the steel ball grooving plate in Embodiment 3 of the present invention;

[0021] Figure 5This is a schematic diagram of the structure in Embodiment 4 of the present invention, in which the steel ball and the target object are in an unclamped state;

[0022] Figure 6 This is a schematic diagram of the structure in Embodiment 4 of the present invention, showing the steel ball and the target object in a clamped state.

[0023] Figure 7 This is a schematic diagram of the structure in Embodiment 4 of the present invention;

[0024] In the diagram: Upper fixing plate 1; Lower fixing plate 2; Steel ball grooving plate 3; Bolt 4; Mounting hole 5; Target object 6; Clamping part 6.1; Track groove 7; Abutting edge 7.1; Arc edge 7.2; Tightening arc edge 7.3; Steel ball 8; Boss body 9; Mounting groove 10; Shrinking surface 11; Arc-shaped extrusion hole 12; First included angle A1; Second included angle A2. Detailed Implementation

[0025] The technical solution of the invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0026] Specific Implementation Example 1: See Appendix Figure 1 To be continued Figure 2 An automatic rotary clamping mechanism includes an upper fixed plate 1, a lower fixed plate 2, and a ball bearing grooving plate 3. The ball bearing grooving plate 3 is positioned between the upper fixed plate 1 and the lower fixed plate 2. The upper fixed plate 1, the ball bearing grooving plate 3, and the lower fixed plate 2 are fixedly connected by three circumferentially equidistant bolts 4. The ball bearing grooving plate 3 has a circular mounting hole 5, the diameter of which is larger than the diameter of the target object's cross-section. At least three equidistant track grooves 7 are formed on the inner wall of the mounting hole 5, and ball bearings 8 are placed in the track grooves 7. The clamping part 6.1 on the target object 6 is cylindrical and can pass through the mounting holes of the lower fixed plate 2 and the ball bearing grooving plate 3 to extend into the upper fixed plate 1, facilitating the insertion of the clamping part 6.1 onto the target material 6. This design features a simple mechanical mechanism, and when the mechanism wears out, it can be quickly put into use by replacing the standard ball bearings 8.

[0027] The inner wall of the track groove 7 includes an abutting edge 7.1, an arc edge 7.2, and a tightening arc edge 7.3 connected in sequence, so that the steel ball 8 can simultaneously achieve tangential connection with the target object 5 and the tightening arc edge 7.3. The track groove 7 structure of this design can effectively improve the rolling efficiency of the steel ball 8, so that the steel ball 8 in the mechanism can quickly clamp and rotate the target object 6 under the action of centrifugal force.

[0028] The steel ball grooving plate 3 has protrusions 9 on its opposite side walls. These protrusions 8 are respectively embedded in the mounting grooves 10 within the upper fixed plate 1 and the lower fixed plate 2. This protrusion design facilitates quick alignment and installation of the mechanism. The mounting groove 10 near the target object 6 has an inclined contraction surface 11, thus forming a mounting cavity for the steel balls between the upper and lower mounting grooves 10 and the track groove 7. This design effectively prevents the steel balls from detaching from the mounting cavity, thus preventing them from falling out and affecting the normal operation of the mechanism.

[0029] Workflow:

[0030] See appendix Figure 1 To be continued Figure 4 This design features a simple structure and effectively utilizes the principle of centrifugal force during rotation to clamp and rotate the clamping part 6.1 on the target object 6. Specifically, when the target object 6 needs to be clamped and rotated, the clamping mechanism is rotated, and the steel balls 8 in the ball bearing roller plate 3 move within the designed track groove 7, achieving the purpose of clamping the target object 6 and rotating it at a preset speed. When the speed decreases or stops, the mechanism automatically disengages from the target object 6. This design is simple, inexpensive, and has great potential for practical use and future promotion. It also effectively solves the concentricity requirement of traditional rotary clamping devices, allowing the mechanism to automatically clamp shaft-type parts within its design range. Specific Implementation Example 2

[0032] See appendix Figure 1 To be continued Figure 3 This embodiment is a further refinement based on specific embodiment 1. There are three track grooves 7 in total, and the track grooves 6 are designed with the same shape and direction. This design ensures the concentricity of the target object after clamping, and the purpose of clamping the target object can be achieved by unidirectional rotation of the clamping mechanism. Specific Implementation Example 3

[0034] See appendix Figure 1 , attached Figure 2 and appendix Figure 4 This embodiment is a further refinement based on specific embodiment 1. There are six track grooves 8 in total, and the shapes and directions of two spaced track grooves 7 are opposite. This design ensures the concentricity of the target object after clamping, and the clamping mechanism can clamp the target object in both forward and reverse directions. Specific Implementation Example 4:

[0036] See appendix Figure 6 , attached Figure 7This embodiment adds an arc-shaped extrusion hole 12 to specific embodiments 1, 2, or 3, while the arc-shaped extrusion hole 11 is located near the tightening arc edge 7.3. This is the second objective of the invention. The design of the arc-shaped extrusion hole 11 allows the mechanism to contract the tightening arc edge 7.3 to a certain extent under the extrusion force without changing the rotational speed. This increases the curvature of the tightening arc edge 7.3 without changing its arc length. Without the arc-shaped extrusion hole 12, the steel ball 8 forms a first included angle A1 after connecting the tangent of the target object 6 and the tightening arc edge 7.3. (See attached diagram). Figure 7 The included angle between the tangents of the solid line portion; an arc-shaped extrusion hole 12 is provided, and the steel ball 8, after being connected tangently to the target object 6 and the tightened arc edge 7.3, forms a second included angle A2, see appendix. Figure 7 The included angle of the tangent connecting the dashed part is shown in the figure. The included angle of the second included angle A2 is greater than that of the first included angle A1. That is, after setting the arc-shaped extrusion hole 12, when clamping the target object, the included angle formed by the tangent connecting the steel ball 8, the target object 6, and the tightening arc edge 7.3 increases. When the mechanism is at the same rotation speed, combined with the force analysis, it can be concluded that the extrusion force of the steel ball on the target object is significantly increased, thereby improving the clamping strength of the steel ball on the target object. At the same time, it will make the steel ball 8 cover a smaller area, so that the clamping mechanism can effectively reduce the situation where the steel ball is dislodged from the original track groove position under external factors such as vibration, thus preventing the target object from loosening, and improving the clamping quality of the clamping mechanism.

[0037] Beneficial effects: (1) This design is an automatic rotary clamping mechanism, which can be applied in scenarios where objects need to be clamped and rotated; (2) This design makes good use of the principle of centrifugal force during the rotation of the clamping mechanism to clamp the target object; (3) This design solves the requirement of concentricity of traditional rotary clamping devices in use, and the mechanism can automatically clamp shaft parts within the design range; (4) This design is simple and inexpensive, and has great potential for practical use and later promotion; (5) This design can save the cumbersome clamping device, clamping power source device, rotating device, and connecting parts between several devices of traditional rotary clamping mechanisms; (6) When the target object needs to be clamped and rotated, this design only needs to rotate, and the steel balls in the mechanism will move in the designed track groove to achieve the purpose of clamping the target object and rotate at the preset speed; when the speed decreases or stops, the mechanism will automatically disengage from the target object; (7) This design can also meet the flexible requirements of the target object to rotate forward and backward. (8) This design is convenient for later use and maintenance. When the mechanism is worn, it can be put into use quickly by simply replacing the standard steel balls. (9) This design can achieve the function of automatically clamping the target object without the need for other power sources, which is of good significance for energy consumption. (10) This design is small in size and has a large clamping force, which can be flexibly applied in a narrow space. (11) This design avoids the action time of traditional automatic rotating mechanisms during use, and has a fast response speed, which is of great significance for improving the pace. (12) This design is easy to debug. Unlike traditional automatic rotating mechanisms, it does not require a very high degree of concentricity with the target object. As long as the target object is within a certain design range, the mechanism can adapt to different target objects. (13) The design of the arc extrusion hole in this mechanism can change the curvature of the shrinking arc edge without changing the arc length, thereby increasing the clamping strength between the steel ball and the target object. At the same time, the mechanism increases the clamping force on the original target object when the rotation speed is the same.

[0038] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Other variations and modifications are possible without departing from the technical solutions described in the claims.

Claims

1. An automatic rotary clamping mechanism, characterized in that it comprises: The clamping mechanism includes a ball bearing groove plate through which a target object can be inserted. The ball bearing groove plate around the target object is provided with a number of slidable ball bearings. By rotating the ball bearing groove plate, the ball bearings can be driven to clamp and rotate the target object under the action of centrifugal force. The steel ball grooving plate has a circular mounting hole with a diameter larger than the diameter of the target object's cross-section. The inner wall of the mounting hole has several equally spaced track grooves, and the steel balls are placed in the track grooves. The inner wall of the track groove includes a contact edge, a circular arc edge, and a tightening arc edge connected in sequence, so that the steel ball can simultaneously achieve a tangential connection with the target object and the tightening arc edge. The outer side of the steel ball grooving plate near the tightening arc edge is provided with an arc-shaped extrusion hole.

2. The automatic rotary clamping mechanism according to claim 1, characterized in that, There are three track slots in total, and the track slots are designed with the same shape and orientation.

3. The automatic rotary clamping mechanism according to claim 1, characterized in that, There are six track slots in total, and the shapes and directions of two spaced-apart track slots are opposite.

4. An automatic rotary clamping mechanism according to claim 2 or 3, characterized in that, The clamping mechanism also includes an upper fixed plate and a lower fixed plate. The steel ball groove plate is fixedly installed between the upper fixed plate and the lower fixed plate. The target object passes through the lower fixed plate and the mounting hole in sequence and extends into the upper fixed plate.

5. An automatic rotary clamping mechanism according to claim 4, characterized in that, The steel ball grooving plate has protrusions on its opposite side walls, and the two protrusions are respectively embedded in the mounting grooves in the upper and lower fixed plates.

6. An automatic rotary clamping mechanism according to claim 5, characterized in that, An inclined contraction surface is provided in the mounting groove on the side closer to the target object, thereby forming a mounting cavity for installing steel balls between the upper and lower mounting grooves and the track groove.

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