Clamping mechanism

Abstract

The utility model relates to the technical field of clamps, and particularly discloses a clamping mechanism which comprises a base, a driving part and a clamping assembly, and the driving part is arranged on the base; the number of the clamping assemblies is at least two, the two clamping assemblies are slidably arranged on the base in the first direction, and the driving part is used for driving the two clamping assemblies to get close to or away from each other; the clamping assembly comprises a clamping seat, a clamping jaw and an elastic piece, and the clamping seat is arranged on the base in a sliding mode in the first direction; the clamping jaw is slidably arranged on the clamping seat between a first position and a second position in the second direction; the elastic piece is arranged between the clamping base and the clamping jaw and used for enabling the clamping jaw to be stopped at the first position. By means of the arrangement, the problems that the workpieces move relative to the clamping jaws, consequently, the workpieces are scratched, and even the workpieces are separated from the clamping jaws, and consequently the workpieces fall off are solved, and the transfer success rate is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of clamps, in particular to a clamping mechanism. Background Art

[0002] In the process of automated assembly, processing or production, grippers are widely used to clamp and transfer various workpieces.

[0003] In the process of transferring the workpiece while clamping it, large up and down accelerations may occur, causing slippage between the clamp and the workpiece, which may cause the workpiece to be scratched or fall out of the clamp, resulting in transfer failure.

[0004] Therefore, it is urgent to study a clamping mechanism to solve the problem of relative sliding between the workpiece and the clamp during the transfer process, resulting in scratches on the workpiece or even separation from the clamp, so as to improve the transfer success rate. Utility Model Content

[0005] The utility model aims to provide a clamping mechanism, which can solve the problem of workpiece scratches or even separation from the clamping claws and improve the transfer success rate.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The clamping mechanism comprises:

[0008] Base;

[0009] A driving member, disposed on the base;

[0010] A clamping assembly, wherein at least two clamping assemblies are provided, and the two clamping assemblies are slidably arranged on the base along a first direction, and the driving member is used to drive the two clamping assemblies to move closer to or away from each other;

[0011] The clamping assembly comprises:

[0012] A clamping seat, the clamping seat is slidably disposed on the base along the first direction;

[0013] A clamping jaw, the clamping jaw being slidably disposed on the clamping seat between a first position and a second position along a second direction;

[0014] An elastic member is disposed between the clamping seat and the clamping jaw, and is used to stop the clamping jaw at a first position.

[0015] As an optional technical solution for a clamping mechanism, a supporting portion is provided at the end of the clamping jaw, and the corresponding two supporting portions in the two oppositely arranged clamping jaws are arranged back to back, and the two clamping assemblies are configured to clamp the workpiece when they are away from each other.

[0016] As an optional technical solution for a clamping mechanism, the supporting portion is provided with a guide surface, and the distance between the two corresponding guide surfaces in the two clamping jaws gradually increases from bottom to top.

[0017] As an optional technical solution for a clamping mechanism, the clamping seat is provided with a first fixing groove, the clamping jaw is provided with a second fixing groove having an opening opposite to the first fixing groove, and the elastic member includes a spring, one end of the spring is located in the first fixing groove, and the other end of the spring is located in the second fixing groove.

[0018] As an optional technical solution of a clamping mechanism, the clamping seat is provided with a limiting portion, and the clamping jaw is provided with a stopping portion, and when the clamping jaw is located at the first position, the stopping portion abuts against the limiting portion.

[0019] As an optional technical solution of a clamping mechanism, the stop portion and the supporting portion are arranged relative to each other in the second direction, and when the clamping claw is located at the second position, the upper side wall of the supporting portion abuts against the limiting portion.

[0020] As an optional technical solution of a clamping mechanism, the clamping claw structure is further provided with a linkage assembly, and the linkage assembly includes:

[0021] An active member, which is slidably disposed on the base along the second direction and connected to an output end of the driving member;

[0022] Connecting rods, wherein two connecting rods are provided, one end of the two connecting rods is hinged to the active member, and the other ends of the two connecting rods are respectively hinged to the corresponding clamping seats.

[0023] As an optional technical solution for a clamping mechanism, the clamping mechanism also includes a first slide rail fixed to the base and a first slider slidably arranged on the first slide rail, the active member is arranged on the first slider, the clamping mechanism also includes a fixed seat, the fixed seat is provided with an avoidance groove, the fixed seat is arranged on the base, and the first slide rail is passed through the avoidance groove, and the driving member is arranged on the fixed seat.

[0024] As an optional technical solution of a clamping mechanism, the clamping components are provided with four groups, each two groups of the clamping components form a clamping group, and the two clamping groups are arranged at intervals along the third direction.

[0025] As an optional technical solution of a clamping mechanism, the base is plate-shaped, and the two clamping groups are respectively located on two sides of the base.

[0026] The beneficial effects of the utility model are:

[0027] The utility model provides a clamping mechanism, which drives two clamping components to approach or move away from each other along a first direction by arranging a driving member, wherein the clamping claw is slidably arranged along a second direction, so that when the base is moving and the acceleration is large, the elastic member is compressed by inertia to buffer the force generated when the base moves, thereby ensuring that the position of the workpiece relative to the clamping claw remains unchanged, avoiding the problem that the workpiece slides relative to the clamping claw and causes the workpiece to be scratched or even separated from the clamping claw and falls, thereby improving the transfer success rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a structural schematic diagram of the clamping mechanism from a first viewing angle in an embodiment of the utility model;

[0029] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0030] Figure 3 It is a structural schematic diagram of the clamping mechanism from a second viewing angle in an embodiment of the utility model.

[0031] In the figure:

[0032] 100, base; 110, first slide rail; 120, first slider; 130, second slide rail; 140, second slider;

[0033] 200, driving member;

[0034] 300, clamping assembly; 310, clamping seat; 311, limiting portion; 320, clamping claw; 321, supporting portion; 322, guiding surface; 323, stopping portion; 330, elastic member;

[0035] 400, linkage assembly; 410, active member; 420, connecting rod;

[0036] 500. Fixed seat. DETAILED DESCRIPTION

[0037] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0041] In the process of transferring the workpiece, in order to prevent the workpiece from being damaged during the clamping process, it is necessary to control the size of the clamping force to avoid excessive clamping force. However, due to this, when the base 100 drives the workpiece to move, when the acceleration during the downward movement is large, the static friction between the workpiece and the clamping jaw 320 cannot overcome the force generated by the base 100, causing the workpiece to move upward, thereby causing sliding friction between the workpiece and the clamping jaw 320. At this time, the surface of the workpiece is easily damaged; when the base 100 moves upward again, the workpiece will move downward relative to the clamping jaw 320, resulting in separation from the clamping jaw 320.

[0042] like Figures 1 to 3As shown, this embodiment provides a clamping mechanism, which includes a base 100, a driving member 200 and a clamping assembly 300, wherein the driving member 200 is arranged on the base 100; there are at least two clamping assemblies 300, and the two clamping assemblies 300 are arranged on the base 100 for sliding along a first direction, and the driving member 200 is used to drive the two clamping assemblies 300 to move closer to or away from each other; the clamping assembly 300 includes a clamping seat 310, a clamping claw 320 and an elastic member 330, wherein the clamping seat 310 is arranged on the base 100 for sliding along a first direction; the clamping claw 320 is arranged on the clamping seat 310 for sliding between a first position and a second position along a second direction; the elastic member 330 is arranged between the clamping seat 310 and the clamping claw 320, and is used to stop the clamping claw 320 at the first position.

[0043] In this embodiment, the clamping mechanism drives the two clamping components 300 to move closer to or away from each other along a first direction by setting a driving member 200, wherein the clamping jaws 320 are set to slide along a second direction, so that when the base 100 is moving and the acceleration is large, the workpiece remains stationary due to inertia, and the elastic member 330 is compressed to buffer the force generated when the base 100 moves, ensuring that the position of the workpiece relative to the clamping jaw 320 remains unchanged, avoiding the problem of the workpiece moving relative to the clamping jaw 320 causing scratches on the workpiece or even the separation of the workpiece and the clamping jaw 320 causing the workpiece to fall, thereby improving the transfer success rate.

[0044] For ease of understanding and description, in this embodiment, the first direction is set to be the left-right direction, the second direction is set to be the up-down direction, and the third direction is set to be the front-back direction.

[0045] In some embodiments, the workpiece can be clamped by two clamping jaws 320 close to each other, but in some embodiments, due to environmental restrictions, it is impossible to clamp from the outside of the workpiece. Therefore, it is necessary to clamp from the inside of the workpiece. A supporting portion 321 is provided at the end of the clamping jaw 320, and the two corresponding supporting portions 321 in the two relatively arranged clamping jaws 320 are arranged back to back, and the two clamping assemblies 300 are configured to clamp the workpiece when they are far away from each other. In this embodiment, a channel is provided inside the workpiece. In the process of clamping the workpiece by the clamping jaws 320, it is necessary to first pass through the channel from top to bottom, and then the two clamping jaws 320 are separated from each other, so that the two supporting portions 321 are both located directly below the workpiece. The above arrangement allows the workpiece to be supported by the supporting portion 321, so that when the base 100 moves upward, even if the acceleration is large, the workpiece will not slide relative to the clamping jaws 320 or even separate from each other.

[0046] The workpiece is placed on the support platform before being clamped. In order to facilitate the insertion of the supporting portion 321 into the gap between the workpiece and the support platform, in some embodiments, the supporting portion 321 is provided with a guide surface 322, and the distance between the two corresponding guide surfaces 322 in the two clamping jaws 320 gradually increases from bottom to top. In some embodiments, under the action of the guide surface 322, when the clamping jaws 320 are separated from each other, they will abut against the support platform, so that the clamping jaws 320 move upward.

[0047] When the two positions of the workpiece that need to be supported are not in the same horizontal plane, that is, one side of the bottom surface of the workpiece is high and the other side is low, the load-bearing platform is set to be high on one side and low on the other side accordingly. In this case, when the base 100 moves downward, one clamping jaw 320 contacts the load-bearing platform first, and the other clamping jaw 320 contacts the load-bearing platform later. When the base 100 continues to move downward, the clamping jaw 320 that contacts the load-bearing platform first moves upward relative to the clamping seat 310. When the two supporting parts 321 are respectively located below the bottom surfaces on both sides of the workpiece, the two clamping jaws 320 are controlled by the driving member 200 to separate from each other and clamp the workpiece. At this time, one clamping jaw 320 is located at the first position, and the other clamping jaw 320 is located between the first position and the second position. The base 100 moves upward and drives the two clamping jaws 320 to move upward and lift the workpiece.

[0048] To improve the safety of the elastic member 330, in some embodiments, the clamping seat 310 is provided with a first fixing groove, the clamping jaw 320 is provided with a second fixing groove whose opening is opposite to the first fixing groove, and the elastic member 330 includes a spring, one end of the spring is located in the first fixing groove, and the other end of the spring is located in the second fixing groove. In some embodiments, two elastic members 330 are provided corresponding to each clamping jaw 320, and the provision of the two elastic members 330 increases the elastic force on the clamping jaw 320 and improves the balance of the force on the clamping jaw 320, thereby improving the smoothness of the lifting process of the clamping jaw 320 relative to the clamping seat 310.

[0049] In some embodiments, the clamping seat 310 is provided with a limiting portion 311, and the clamping jaw 320 is provided with a stopper 323. When the clamping jaw 320 is located at the first position, the stopper 323 abuts against the limiting portion 311. The stopper 323 and the supporting portion 321 are arranged relative to each other in the second direction. When the clamping jaw 320 is located at the second position, the upper side wall of the supporting portion 321 abuts against the limiting portion 311. With the arrangement of the above structure, the clamping jaw 320 is mechanically limited at two positions, ensuring the certainty of the moving position of the clamping jaw 320.

[0050] A limiting groove is formed between the supporting portion 321 and the stopping portion 323 , and the limiting portion 311 is located in the limiting groove.

[0051] In order to reduce the number of driving members 200, in some embodiments, the structure of the clamping jaw 320 is further provided with a linkage assembly 400, which includes an active member 410 and a connecting rod 420, wherein the active member 410 is slidably disposed on the base 100 along the second direction and is connected to the output end of the driving member 200; there are two connecting rods 420, one end of each of the two connecting rods 420 is hinged to the active member 410, and the other ends of the two connecting rods 420 are respectively hinged to the corresponding clamping seat 310. The two connecting rods 420 are arranged obliquely, so that under the drive of the driving member 200, the active member 410 reciprocates in the second direction, thereby driving the two clamping seats 310 to approach or move away from each other in the first direction through the connecting rod 420. In some embodiments, the driving member 200 can be a cylinder.

[0052] In order to improve the smoothness of the movement of the active member 410, in some embodiments, the clamping mechanism further includes a first slide rail 110 fixed to the base 100 and a first slider 120 slidably arranged on the first slide rail 110, the active member 410 is arranged on the first slider 120, the clamping mechanism further includes a fixed seat 500, the fixed seat 500 is provided with an avoidance groove, the fixed seat 500 is arranged on the base 100, and the first slide rail 110 is penetrated in the avoidance groove, and the driving member 200 is arranged on the fixed seat 500. The setting of the fixed seat 500 and the avoidance groove improves the structural compactness of the clamping mechanism. In other embodiments, a sliding hole can also be set on the base 100, and the active member 410 is at least partially penetrated in the sliding hole.

[0053] In this embodiment, in order to ensure the stability of the workpiece clamping, the clamping assembly 300 is provided with four groups, and every two groups of clamping assemblies 300 form a clamping group, and the two clamping groups are arranged at intervals along the third direction. The four clamping jaws 320 clamp the workpiece from four parts respectively, effectively ensuring the clamping stability of the workpiece. Among them, the workpiece has an annular structure, and the four clamping jaws 320 are separated and located on the periphery of the center of gravity of the workpiece.

[0054] In some embodiments, the base 100 is plate-shaped, and the two clamping groups are respectively located at the front and rear sides of the base 100. The above arrangement effectively reduces the volume of the base 100 and reduces the cost; at the same time, it improves the mobility of the clamping mechanism.

[0055] In some embodiments, two driving members 200 are provided, and the two driving members 200 drive two clamping groups respectively. This arrangement allows the separation distance between the two clamping jaws 320 in each clamping group to be controlled separately, which is used to expand the scope of application. In some embodiments, the two driving members 200 are separated on both sides of the base 100 to improve the symmetry of the overall structure.

[0056] In order to ensure the smoothness of the movement of the clamping jaw 320, in some embodiments, the clamping seat 310 is provided with a second slide rail 130, on which a second slider 140 is slidably provided, and the clamping jaw 320 is connected to the second slider 140. Among them, one second slide rail 130 is provided with two second sliders 140. The above arrangement improves the smoothness of the sliding of the clamping jaw 320 in the third direction, and under the action of the slide rail and the slider, it is conducive to bearing greater gravity.

[0057] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A clamping mechanism, characterized in that: include: Base (100); A driving member (200) is disposed on the base (100); A clamping assembly (300), wherein at least two clamping assemblies (300) are provided, and the two clamping assemblies (300) are slidably arranged on the base (100) along a first direction, and the driving member (200) is used to drive the two clamping assemblies (300) to move closer to or farther from each other; The clamping assembly (300) comprises: A clamping seat (310), the clamping seat (310) being slidably disposed on the base (100) along the first direction; A clamping jaw (320), the clamping jaw (320) being slidably disposed on the clamping seat (310) between a first position and a second position along a second direction; An elastic member (330), wherein the elastic member (330) is disposed between the clamping seat (310) and the clamping jaw (320), and is used to stop the clamping jaw (320) at a first position.

2. The clamping mechanism according to claim 1, characterized in that: A supporting portion (321) is provided at the end of the clamping jaw (320), and the corresponding two supporting portions (321) in the two clamping jaws (320) arranged opposite to each other are arranged back to back, and the two clamping assemblies (300) are configured to be able to clamp a workpiece when they are away from each other.

3. The clamping mechanism according to claim 2, characterized in that: The supporting portion (321) is provided with a guide surface (322), and the distance between the two corresponding guide surfaces (322) in the two clamping jaws (320) gradually increases from bottom to top.

4. The clamping mechanism according to claim 1, characterized in that: The clamping seat (310) is provided with a first fixing groove, the clamping jaw (320) is provided with a second fixing groove having an opening opposite to the first fixing groove, and the elastic member (330) comprises a spring, one end of the spring is located in the first fixing groove, and the other end of the spring is located in the second fixing groove.

5. The clamping mechanism according to claim 2, characterized in that: The clamping seat (310) is provided with a limiting portion (311), and the clamping jaw (320) is provided with a stopping portion (323). When the clamping jaw (320) is located at the first position, the stopping portion (323) abuts against the limiting portion (311).

6. The clamping mechanism according to claim 5, characterized in that: The stop portion (323) and the supporting portion (321) are arranged relative to each other in the second direction, and when the clamping jaw (320) is located at the second position, the upper side wall of the supporting portion (321) abuts against the limiting portion (311).

7. The clamping mechanism according to any one of claims 1 to 6, characterized in that: The clamping jaw (320) structure is further provided with a linkage assembly (400), and the linkage assembly (400) comprises: An active member (410), the active member (410) being slidably disposed on the base (100) along the second direction and being connected to an output end of the driving member (200); The connecting rod (420) is provided with two connecting rods (420), one end of each of the two connecting rods (420) is hinged to the active member (410), and the other end of each of the two connecting rods (420) is hinged to the corresponding clamping seat (310).

8. The clamping mechanism according to claim 7, characterized in that: The clamping mechanism further comprises a first slide rail (110) fixed to the base (100) and a first slider (120) slidably arranged on the first slide rail (110); the active member (410) is arranged on the first slider (120); the clamping mechanism further comprises a fixed seat (500); the fixed seat (500) is provided with an avoidance groove; the fixed seat (500) is arranged on the base (100), and the first slide rail (110) is passed through the avoidance groove; the driving member (200) is arranged on the fixed seat (500).

9. The clamping mechanism according to claim 1, characterized in that: The clamping assemblies (300) are provided in four groups, and every two groups of the clamping assemblies (300) form a clamping group, and the two clamping groups are arranged at intervals along the third direction.

10. The clamping mechanism according to claim 9, characterized in that: The base (100) is plate-shaped, and the two clamping groups are respectively located on two sides of the base (100) along the third direction.

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