Automatic clamping device

Abstract

The utility model discloses an automatic clamping device, which relates to the technical field of CNC (computer numerical control) jigs, and comprises a body, the body is provided with a plurality of clamping arms and a plurality of accommodating cavities, the accommodating cavities are used for placing workpieces, the clamping arms are pivotally connected to the body, each clamping arm comprises a first end and a second end, the body is provided with an elastic piece, and the elastic piece is used for pushing the second end to enable the clamping arms to rotate. Therefore, the first end presses the workpiece, the workpiece is clamped, the screw does not need to be turned manually, and the production efficiency is improved. The rotating central axis of the clamping arm is close to the first end, the force arm of the elastic piece for driving the clamping arm to rotate can be increased, and therefore the clamping force on the workpiece is improved, and the installation stability of the workpiece is improved.

Description

Technical Field

[0001] This utility model relates to the field of CNC fixture technology, and in particular to an automatic clamping device. Background Technology

[0002] In related technologies, for the machining of small-sized parts, the fixture often has multiple mounting cavities for fixing the workpiece. Currently, the workpiece is assembled and disassembled from the fixture by manually tightening screws, which is inefficient and labor-intensive for workers. At the same time, manual operation is prone to problems such as loose clamping and material falling out, which can easily lead to machining defects and increase the defect rate. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an automatic clamping device that can achieve automatic clamping without manual operation, thereby improving production efficiency.

[0004] An automatic clamping device according to an embodiment of the present invention includes:

[0005] The body has multiple clamping arms and multiple cavities. The cavities are used to place the workpiece. The clamping arms are pivotally connected to the body. The clamping arms include a first end and a second end. The body is provided with an elastic element, which is used to push against the second end to make the clamping arm rotate, so that the first end presses against the workpiece to achieve workpiece clamping. The rotation center axis of the clamping arm is close to the first end.

[0006] An automatic clamping device according to an embodiment of the present invention has at least the following beneficial effects:

[0007] In this embodiment, the second end of the clamping arm is pushed by an elastic element, causing the clamping arm to rotate. This causes the first end to press against the workpiece, achieving automatic workpiece clamping without the need for manual screw tightening, which improves production efficiency. Furthermore, the rotation center axis of the clamping arm is close to the first end, which increases the lever arm for the elastic element to drive the clamping arm to rotate, thereby increasing the clamping force on the workpiece and improving the installation stability of the workpiece.

[0008] According to some embodiments of this utility model, the main body is provided with a rotating shaft, which is inserted into the clamping arm, and the clamping arm rotates around the rotating shaft.

[0009] According to some embodiments of the present invention, the main body is provided with a plurality of clamping arms arranged along its length direction, and an installation component is provided between two adjacent clamping arms. The main body is provided with a rotating shaft, and the clamping arms rotate around the rotating shaft. The rotating shaft is fixedly installed on the installation component.

[0010] According to some embodiments of the present invention, a clamping member is provided inside the main body, and a cavity is provided on the clamping member. When the first end presses against the clamping member, the inner wall of the cavity can press against the outer wall of the workpiece.

[0011] According to some embodiments of the present invention, a clamping member is provided inside the body. The clamping member has an elastic part and a first clamping part. The elastic part is used to elastically reset the first clamping part.

[0012] According to some embodiments of the present invention, the clamping member further includes a second clamping part, and the cavity is located between the first clamping part and the second clamping part.

[0013] According to some embodiments of the present invention, the clamping member has a hollowed-out portion, which is located below the first clamping portion and communicates with the cavity.

[0014] According to some embodiments of the present invention, a protrusion is provided at the first end, and a clamping member is provided on the body. The protrusion protrudes from the clamping arm toward the clamping member and can press against the clamping member.

[0015] According to some embodiments of the present invention, there is a gap between the first clamping part and the second clamping part, and the gap communicates with the cavity.

[0016] According to some embodiments of this utility model, the main body is provided with a plurality of mounting cavities, and the clamping member is embedded in the mounting cavity.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0019] Figure 1 This is a perspective view of an automatic clamping device according to an embodiment of the present utility model;

[0020] Figure 2 This is a first cross-sectional view of an automatic clamping device according to an embodiment of the present utility model;

[0021] Figure 3 This is a second cross-sectional view of an automatic clamping device according to an embodiment of the present utility model;

[0022] Figure 4 for Figure 3 A magnified view of A in the middle.

[0023] Figure label:

[0024] Body 100; mounting cavity 101; elastic element 102; clamping arm 103; first end 104; second end 105; protrusion 106; rotating shaft 107; workpiece 108; mounting component 109;

[0025] Clamping component 110; cavity 111; first clamping part 112; second clamping part 113; hollow part 114; elastic part 115; gap 116. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0027] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0029] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0030] Reference Figure 1An automatic clamping device according to an embodiment of the present invention includes a body 100, which has multiple clamping arms 103 and multiple cavities 111 for placing workpieces 108. The multiple cavities 111 and the multiple clamping arms 103 are arranged along the length direction of the body 100. It is understood that the clamping arms 103 are pivotally connected to the body 100, and each clamping arm 103 includes a first end 104 and a second end 105. An elastic element 102 is provided on the body 100, which pushes against the second end 105 to cause the clamping arm 103 to rotate, thereby causing the first end 104 to press against the workpiece 108, thus clamping the workpiece 108 without the need for manual screw tightening, which is beneficial to improving production efficiency. The rotation center axis of the clamping arm 103 is close to the first end 104, which increases the lever arm for the elastic element 102 to drive the clamping arm 103 to rotate, thereby increasing the clamping force on the workpiece 108 and improving the installation stability of the workpiece 108.

[0031] Specifically, refer to Figure 2 A mounting member 109 is provided between two adjacent clamping arms 103, and a rotating shaft 107 is provided on the main body 100. The clamping arms 103 rotate around the rotating shaft 107, and the rotating shaft 107 is fixedly installed on the mounting member 109. It can be understood that the mounting member 109 is fixedly installed on the outer walls of both sides of the main body 100 along the width direction, and the rotating shaft 107 passes through the clamping arms 103. Understandably, the central axis of the rotating shaft 107 is close to the first end 104. Specifically, the distance between the central axis of the rotating shaft 107 and the top wall of the first end 104 is less than the distance between the central axis of the rotating shaft 107 and the bottom wall of the second end 105. On the one hand, this can increase the lever arm of the elastic element 102 driving the clamping arm 103 to rotate, thereby increasing the clamping force on the workpiece 108. On the other hand, it can reduce the movement amplitude of the first end 104 when the clamping arm 103 rotates, preventing foreign objects from falling into the cavity 111 during loading and unloading. It can also reduce the gap 116 between the side wall of the cavity 111 and the workpiece 108, enabling preliminary positioning of the workpiece 108 during loading and unloading, which is beneficial to improving the installation accuracy of the workpiece 108.

[0032] It is understood that the main body 100 has a mounting cavity 101, and a clamping member 110 is embedded in the mounting cavity 101. The clamping member 110 has a cavity 111. When the first end 104 presses against the clamping member 110, the inner wall of the cavity 111 can press against the outer wall of the workpiece 108. Specifically, the clamping member 110 includes a first clamping part 112 and a second clamping part 113. There is a gap 116 between the first clamping part 112 and the second clamping part 113, and the gap 116 communicates with the cavity 111. Further, the second clamping part 113 is fixed to the main body 100, and the first clamping part 112 can move relative to the second clamping part 113, so that the width of the gap 116 changes, thereby realizing the clamping and releasing of the workpiece 108.

[0033] Furthermore, the clamping member 110 is provided with a hollow portion 114, which is located below the first clamping portion 112 and communicates with the gap 116. Thus, by providing the hollow portion 114, an elastic portion 115 is formed below the first clamping portion 112. The elastic portion 115 can generate elastic bending, thereby enabling the first clamping portion 112 to move relative to the second clamping portion 113, thereby realizing the clamping and releasing of the workpiece 108.

[0034] It is understood that the clamping member 110 is made of metal and has good strength. Therefore, in this application, the central axis of the rotating shaft 107 is close to the first end 104, which can reduce the movement of the first end 104 pushing the first clamping part 112 when the clamping arm 103 rotates, and reduce the bending amplitude of the elastic part 115, thereby avoiding fatigue and damage to the elastic part 115, and ensuring that the clamping member 110 can clamp and release well.

[0035] Furthermore, the first end 104 is provided with a protrusion 106, which protrudes from the clamping arm 103 toward the clamping member 110 and can press against the clamping member 110. It is understood that at least two protrusions 106 are provided, extending along the length of the body 100. The clamping arm 103 can press against the first clamping part 112 via the protrusions 106, causing the clamping member 110 to clamp the workpiece 108. It is understood that when the clamping arm 103 rotates, the first end 104 rotates around the pivot 107, and the movement trajectory is an arc. Therefore, when the first end 104 presses against and pushes the first clamping part 112 to move, there is sliding friction between the first end 104 and the first clamping part 112. The protrusion 106 that contacts the clamping member 110 can reduce the contact area between the first end 104 and the first clamping part 112, thereby reducing the frictional resistance between the first end 104 and the first clamping part 112. This helps to reduce the rotational resistance of the clamping arm 103, improve the smoothness of the clamping arm 103's movement, and thus improve the efficiency of the movement.

[0036] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. An automatic clamping device, characterized in that, include: The body (100) is provided with multiple clamping arms (103) and multiple cavities (111). The cavities (111) are used to place workpieces (108). The clamping arms (103) are pivotally connected to the body (100). The clamping arms (103) include a first end (104) and a second end (105). The body (100) is provided with an elastic element (102). The elastic element (102) is used to push against the second end (105) to make the clamping arm (103) rotate, so that the first end (104) presses against the workpiece (108) to achieve clamping of the workpiece (108). The rotation center axis of the clamping arm (103) is close to the first end (104).

2. The automatic clamping device according to claim 1, characterized in that, The main body (100) is provided with a rotating shaft (107), the rotating shaft (107) is inserted into the clamping arm (103), and the clamping arm (103) rotates around the rotating shaft (107).

3. The automatic clamping device according to claim 1, characterized in that, The main body (100) is provided with a plurality of clamping arms (103) arranged along its length direction, and a mounting member (109) is provided between two adjacent clamping arms (103). The main body (100) is provided with a rotating shaft (107), and the clamping arms (103) rotate around the rotating shaft (107). The rotating shaft (107) is fixedly installed on the mounting member (109).

4. An automatic clamping device according to claim 1, characterized in that, The body (100) is provided with a clamping member (110), and the clamping member (110) is provided with a cavity (111). When the first end (104) presses against the clamping member (110), the inner wall of the cavity (111) can press against the outer wall of the workpiece (108).

5. An automatic clamping device according to claim 1, characterized in that, The body (100) is provided with a clamping member (110), which has an elastic part (115) and a first clamping part (112). The elastic part (115) is used to elastically reset the first clamping part (112).

6. An automatic clamping device according to claim 5, characterized in that, The clamping member (110) further includes a second clamping part (113), and the cavity (111) is located between the first clamping part (112) and the second clamping part (113).

7. An automatic clamping device according to claim 5, characterized in that, The clamping member (110) has a hollow portion (114) located below the first clamping portion (112) and connected to the cavity (111).

8. An automatic clamping device according to claim 1, characterized in that, The first end (104) is provided with a protrusion (106), and the body (100) is provided with a clamping member (110). The protrusion (106) protrudes from the clamping arm (103) toward the clamping member (110) and can press against the clamping member (110).

9. An automatic clamping device according to claim 6, characterized in that, There is a gap (116) between the first clamping part (112) and the second clamping part (113), and the gap (116) communicates with the cavity (111).

10. An automatic clamping device according to claim 4, characterized in that, The main body (100) is provided with a plurality of mounting cavities (101), and the clamping member (110) is embedded in the mounting cavity (101).

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