Clamping jig

Abstract

An installation plate is arranged at one end of a sleeve of the clamping jig, a clamping cylinder is installed on the installation plate in the mode that the installation plate and the sleeve are coaxial, a plurality of containing grooves are formed in the circumferential side wall of the clamping cylinder, the inner wall and the outer wall of the clamping cylinder are communicated through the containing grooves, and a ball is movably connected into each containing groove. A driving mechanism for driving the moving block to move is arranged at the other end of the sleeve; a positioning column capable of being embedded into the clamping cylinder is arranged in the center of a cover plate, an annular clamping groove matched with the annular clamping part is formed in the circumferential side wall of the positioning column, limiting columns are arranged on the portions, located on the two sides of the positioning column, of the cover plate respectively, and limiting holes for the limiting columns to be embedded are formed in the mounting plate. According to the clamping jig, the accuracy of picking the cover plate is improved, the situation that picking is unstable and fails due to the fact that the cover plate inclines and deviates is reduced, the situation that the cover plate rotates is avoided, and the stability of the cover plate is improved.

Description

Technical Field

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

[0002] Jigs are indispensable in the field of mechanical manufacturing. The design of jigs is of great significance to the machining stability, molding accuracy and processing efficiency of products. The purpose is to be able to repeat specific actions, accurately process high-precision products, and make the workpiece size more accurate. In the processing of electronic products, it is usually necessary to place the shell on the positioning jig and install the cover on the shell. The traditional way is to move the cover manually.

[0003] In the prior art, the movement of the cover plate is achieved by a clamping jig, which includes a clamper and a positioning column. The positioning column is arranged on the cover plate, and the clamper cooperates with the positioning column on the cover plate to achieve a fixed connection between the clamper and the cover plate, thereby replacing the personnel to lift and lower the cover plate, greatly reducing the labor intensity of the personnel.

[0004] However, during the use of the clamping jig, it is difficult to ensure the accurate connection between the clamping jig and the cover plate, which causes the cover plate to easily tilt or even fall during the connection process. In addition, during the process of transferring the cover plate after clamping, the cover plate is prone to rotate, resulting in the clamped cover plate being unstable, which affects subsequent processing. Summary of the invention

[0005] The utility model aims to provide a clamping jig, which improves the accuracy of cover plate picking, reduces the situation of unstable picking and failure caused by cover plate tilting and deviation, avoids the situation of cover plate rotating, and improves the stability of the cover plate.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a clamping fixture, comprising: a clamping cylinder, a sleeve and a moving block located inside the sleeve, one end of the sleeve is provided with a mounting plate, and the clamping cylinder is mounted on the mounting plate in a coaxial manner with the sleeve, and a plurality of accommodating grooves are opened along the circumferential side wall of the clamping cylinder, the accommodating groove connects the inner wall and the outer wall of the clamping cylinder, and a ball is movably connected inside the accommodating groove;

[0007] A driving mechanism for driving the moving block to move is disposed at the other end of the sleeve. When the driving mechanism pushes the moving block to move along the outer wall of the clamping cylinder, the ball is exposed from the accommodating groove, and an annular clamping portion is formed on the inner wall of the clamping cylinder.

[0008] A positioning column capable of being embedded in a locking tube is arranged at the central position of a cover plate, and an annular groove cooperating with an annular locking portion is arranged on the circumferential side wall of the positioning column, a limiting column is respectively installed on both sides of the positioning column and on the cover plate, and a limiting hole for the limiting column to be embedded is opened on the mounting plate.

[0009] The further improved scheme in the above technical scheme is as follows:

[0010] 1. In the above solution, the annular groove comprises: an annular portion, and push-up inclined surfaces located on the upper and lower sides of the annular portion, and the outer wall diameter of the push-up inclined surfaces increases gradually in the direction away from the annular portion.

[0011] 2. In the above solution, the limiting hole is connected to the side wall of the mounting plate.

[0012] 3. In the above solution, the shape of the limiting hole is U-shaped.

[0013] 4. In the above solution, the number of the limiting columns is an even number, and the limiting columns are symmetrically distributed about the positioning column.

[0014] 5. In the above solution, the upper end of the limit column is a conical tip.

[0015] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0016] The utility model discloses a clamping fixture, wherein a plurality of accommodating grooves are provided along the circumferential side wall of the engaging cylinder, the accommodating grooves connect the inner wall and the outer wall of the engaging cylinder, and a ball is movably connected inside the accommodating groove, a positioning post which can be embedded in the engaging cylinder is provided at the central position of the cover plate, a limiting post is respectively installed on the cover plate at both sides of the positioning post, and a limiting hole for embedding the limiting post is provided on the mounting plate, and the connection between the engaging cylinder and the positioning post is guided by correspondingly embedding the limiting post in the limiting hole, and then, by embedding the positioning post of the cover plate into the engaging cylinder, the moving block is driven to move along the outer wall of the engaging cylinder, so that the ball is exposed from the inner wall of the engaging cylinder and is engaged in the annular groove, thereby realizing the connection between the engaging cylinder and the positioning post, which is beneficial to guiding the engagement of the engaging cylinder and the positioning post, improving the accuracy of picking up the cover plate, reducing the situation that the picking up is unstable and failed due to the tilting and offset of the cover plate, and avoiding the situation that the cover plate rotates by itself, thereby improving the stability of the cover plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Attached Figure 1 This is a schematic diagram of the structure of the clamping fixture of the utility model;

[0018] Attached Figure 2 It is a partial structural schematic diagram of the clamping fixture of the utility model;

[0019] Attached Figure 3 It is a partial structural sectional view of the clamping fixture of the utility model.

[0020] In the above figures: 1. cover plate; 2. positioning column; 201. annular groove; 2011. annular portion; 2012. push-up slope; 3. driving mechanism; 4. moving block; 401. conical inner wall; 5. sleeve; 6. engaging cylinder; 601. ball; 602. annular slope; 603. accommodating groove; 7. mounting plate; 701. limiting hole; 8. limiting column. DETAILED DESCRIPTION

[0021] The present invention can be further understood through the specific embodiments given below, but they are not intended to limit the present invention.

[0022] Embodiment 1: A clamping fixture comprises: a clamping cylinder 6, a sleeve 5 and a moving block 4 located inside the sleeve 5, wherein one end of the sleeve 5 is provided with a mounting plate 7, and the clamping cylinder 6 is mounted on the mounting plate 7 in a coaxial manner with the sleeve 5, and a plurality of receiving grooves 603 are opened along the circumferential side wall of the clamping cylinder 6, the receiving groove 603 connects the inner wall and the outer wall of the clamping cylinder 6, and a ball 601 is movably connected inside the receiving groove 603;

[0023] The other end of the sleeve 5 is provided with a driving mechanism 3 for driving the moving block 4 to move. When the driving mechanism 3 pushes the moving block 4 to move along the outer wall of the clamping tube 6, the ball 601 is exposed from the receiving groove 603, and an annular clamping portion is formed on the inner wall of the clamping tube 6.

[0024] The locking cylinder inside the sleeve can be aligned with the positioning column, and the limiting holes on both sides of the mounting plate are aligned with the limiting columns. The sleeve is continued to be moved so that the positioning column is embedded in the locking cylinder and the limiting column is embedded in the limiting hole. At this time, the driving mechanism drives the moving block away from the locking cylinder, and the ball can move in the receiving groove. When the positioning column is embedded in the locking cylinder, the upper end of the positioning column squeezes the ball so that the ball is retracted into the receiving groove.

[0025] A positioning column 2 capable of being embedded in the clamping tube 6 is provided at the central position of a cover plate 1, and an annular clamping groove 201 cooperating with the annular clamping portion is provided on the circumferential side wall of the positioning column 2, and a limiting column 8 is respectively installed on both sides of the positioning column 2 and on the cover plate 1, and a limiting hole 701 for the limiting column 8 to be embedded is provided on the mounting plate 7;

[0026] When the locking cylinder is engaged with the positioning column, the driving mechanism drives the moving block to approach the locking cylinder, so that the conical inner wall of the moving block contacts the annular inclined surface of the locking cylinder, so that the moving block pushes the ball out of the accommodating groove, so that the ball contacts the upper pushing inclined surface of the annular locking groove, so that the locking cylinder and the positioning column are fixed, so that the cover plate can be clamped and moved. When it moves to the specified position, the locking cylinder is separated from the positioning column, and the moving block moves away from the locking cylinder. Through the gravity of the cover plate, the pushing inclined surface on the upper side of the annular locking groove can push the ball back into the accommodating groove, thereby separating the cover plate from the locking cylinder.

[0027] The annular groove 201 comprises an annular portion 2011 and push-up inclined surfaces 2012 located at the upper and lower sides of the annular portion 2011 , and the outer wall diameter of the push-up inclined surfaces 2012 increases in a direction away from the annular portion 2011 .

[0028] The limiting hole 701 is connected to the side wall of the mounting plate 7 .

[0029] The limiting hole 701 is in a U-shape.

[0030] The number of the above-mentioned limiting posts 8 is 2, and the limiting posts 8 are symmetrically distributed with respect to the positioning posts 2; the upper ends of the above-mentioned limiting posts 8 are tapered tips.

[0031] An annular inclined surface 602 is disposed at one end of the locking tube 6 close to the moving block 4 and along its circumference.

[0032] The moving block 4 has a conical inner wall 401 corresponding to the annular inclined surface 602, and the diameter of the conical inner wall 401 decreases from bottom to top.

[0033] The driving mechanism 3 is a cylinder, and the movable rod of the cylinder can extend into the interior of the sleeve 5 and be fixedly connected with the moving block 4 .

[0034] The opening diameter of the accommodating groove 603 is 0.82 times the diameter of the ball 601 .

[0035] Embodiment 2: A clamping fixture, comprising: a clamping cylinder 6, a sleeve 5, and a moving block 4 located inside the sleeve 5, wherein one end of the sleeve 5 is provided with a mounting plate 7, and the clamping cylinder 6 is mounted on the mounting plate 7 in a coaxial manner with the sleeve 5, and a plurality of receiving grooves 603 are opened along the circumferential side wall of the clamping cylinder 6, the receiving groove 603 connects the inner wall and the outer wall of the clamping cylinder 6, and a ball 601 is movably connected inside the receiving groove 603;

[0036] The other end of the sleeve 5 is provided with a driving mechanism 3 for driving the moving block 4 to move. When the driving mechanism 3 pushes the moving block 4 to move along the outer wall of the clamping tube 6, the ball 601 is exposed from the receiving groove 603, and an annular clamping portion is formed on the inner wall of the clamping tube 6.

[0037] By embedding the positioning column of the cover plate into the inside of the clamping cylinder, and then driving the moving block to move along the outer wall of the clamping cylinder, the ball is exposed from the inner wall of the clamping cylinder and is clamped in the annular clamping groove, thereby realizing the connection between the clamping cylinder and the positioning column, realizing the picking up of the cover plate, avoiding the deformation of the cover plate caused by uneven force during the flipping process, and reducing the safety risk;

[0038] A positioning column 2 capable of being embedded in the clamping tube 6 is provided at the central position of a cover plate 1, and an annular clamping groove 201 cooperating with the annular clamping portion is provided on the circumferential side wall of the positioning column 2, and a limiting column 8 is respectively installed on both sides of the positioning column 2 and on the cover plate 1, and a limiting hole 701 for the limiting column 8 to be embedded is provided on the mounting plate 7;

[0039] The limit column is embedded in the limit hole to guide the connection between the locking cylinder and the positioning column. Then, the positioning column of the cover plate is embedded in the locking cylinder, and the moving block is driven to move along the outer wall of the locking cylinder, so that the ball is exposed from the inner wall of the locking cylinder and is engaged in the annular groove, thereby realizing the connection between the locking cylinder and the positioning column, which is beneficial to guiding the engagement of the locking cylinder and the positioning column, improving the accuracy of picking up the cover plate, reducing the situation of unstable picking and failure caused by tilting and offsetting of the cover plate, and avoiding the situation of self-rotation of the cover plate, thereby improving the stability of the cover plate.

[0040] The annular groove 201 comprises: an annular portion 2011, and push-up inclined surfaces 2012 located on the upper and lower sides of the annular portion 2011, and the outer wall diameter of the push-up inclined surfaces 2012 increases in a direction away from the annular portion 2011;

[0041] When the locking cylinder is separated from the positioning column, the pushing inclined surface located on the lower side of the annular groove can push the ball back into the accommodating groove. When the locking cylinder is engaged with the positioning column, the moving block pushes the ball out of the accommodating groove, so that the ball is pushed into contact with the pushing inclined surface on the upper side of the annular groove, which improves the clamping stability and is also beneficial to reducing the gap between the locking cylinder and the positioning column, reducing the wear between the ball and the annular groove, and extending the service life.

[0042] The limiting hole 701 is connected to the side wall of the mounting plate 7 .

[0043] The number of the limiting posts 8 is four, and the limiting posts 8 are symmetrically distributed with respect to the positioning posts 2 .

[0044] An annular inclined surface 602 is disposed at one end of the locking tube 6 close to the moving block 4 and along its circumference.

[0045] The driving mechanism 3 is a telescopic rod, and the movable rod of the telescopic rod can extend into the interior of the sleeve 5 and be fixedly connected with the moving block 4 .

[0046] The accommodating grooves 603 are arranged at equal intervals.

[0047] The opening diameter of the accommodating groove 603 is 0.96 times the diameter of the ball 601 .

[0048] The working principle is:

[0049] When in use, the locking cylinder inside the sleeve can be aligned with the positioning column, the limiting holes on both sides of the mounting plate are aligned with the limiting columns, and the sleeve is continued to be moved so that the positioning column is embedded in the locking cylinder and the limiting column is embedded in the limiting hole. At this time, the driving mechanism drives the moving block away from the locking cylinder, and the ball can move in the receiving groove. When the positioning column is embedded in the locking cylinder, the upper end of the positioning column squeezes the ball so that the ball is retracted into the receiving groove.

[0050] When the locking cylinder is engaged with the positioning column, the driving mechanism drives the moving block to approach the locking cylinder, so that the conical inner wall of the moving block contacts the annular inclined surface of the locking cylinder, so that the moving block pushes the ball out of the accommodating groove, so that the ball contacts the upper pushing inclined surface of the annular locking groove, so that the locking cylinder and the positioning column are fixed, so that the cover plate can be clamped and moved. When it moves to the specified position, the locking cylinder is separated from the positioning column, and the moving block moves away from the locking cylinder. Through the gravity of the cover plate, the pushing inclined surface on the upper side of the annular locking groove can push the ball back into the accommodating groove, thereby separating the cover plate from the locking cylinder.

[0051] When the above-mentioned clamping fixture is used, it is helpful to guide the engagement of the locking tube and the positioning column, improve the accuracy of cover plate picking, reduce the situation of unstable picking and failure caused by cover plate tilting and offset, and avoid the cover plate rotating, thereby improving the stability of the cover plate.

[0052] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A clamping fixture, characterized in that: include: A locking cylinder (6), a sleeve (5), and a moving block (4) located inside the sleeve (5), wherein one end of the sleeve (5) is provided with a mounting plate (7), and the locking cylinder (6) is mounted on the mounting plate (7) in a coaxial manner with the sleeve (5), and a plurality of receiving grooves (603) are provided along the circumferential side wall of the locking cylinder (6), wherein the receiving groove (603) connects the inner wall and the outer wall of the locking cylinder (6), and a ball (601) is movably connected inside the receiving groove (603); A driving mechanism (3) for driving the moving block (4) to move is disposed at the other end of the sleeve (5); when the driving mechanism (3) pushes the moving block (4) to move along the outer wall of the locking cylinder (6), the ball (601) is exposed from the accommodating groove (603), and an annular locking portion is formed on the inner wall of the locking cylinder (6); A positioning column (2) capable of being embedded in a locking cylinder (6) is provided at the central position of a cover plate (1), and an annular locking groove (201) cooperating with an annular locking portion is provided on the circumferential side wall of the positioning column (2), a limiting column (8) is respectively installed on both sides of the positioning column (2) and on the cover plate (1), and a limiting hole (701) is provided on the mounting plate (7) for the limiting column (8) to be embedded.

2. The clamping fixture according to claim 1, characterized in that: The annular groove (201) comprises an annular portion (2011), and push-up inclined surfaces (2012) located on the upper and lower sides of the annular portion (2011), and the outer wall diameter of the push-up inclined surfaces (2012) increases in sequence in a direction away from the annular portion (2011).

3. The clamping fixture according to claim 1, characterized in that: The limiting hole (701) is in communication with the side wall of the mounting plate (7).

4. The clamping fixture according to claim 1, characterized in that: The limiting hole (701) is in a U-shape.

5. The clamping fixture according to claim 1, characterized in that: The number of the limiting columns (8) is an even number, and the limiting columns (8) are symmetrically distributed with respect to the positioning columns (2).

6. The clamping fixture according to claim 1, characterized in that: The upper end of the limiting column (8) is a conical tip.

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