Cylindrical workpiece clamping mechanism and device

Abstract

The utility model discloses a cylindrical workpiece clamping mechanism and device, and relates to the technical field of cylindrical workpiece clamping. One end of the first swing arm is connected with a power mechanism, and the other end of the first swing arm is provided with a first arc-shaped abutting part; one end of the second swing arm is connected with the power mechanism, and the other end is provided with a second arc-shaped abutting part; the concave arc-shaped surfaces of the first arc-shaped abutting part and the second arc-shaped abutting part are oppositely arranged, and the concave arc-shaped surfaces of the first arc-shaped abutting part and the second arc-shaped abutting part are respectively provided with a first conical surface structure and a second conical surface structure; the conical end of the first conical surface structure and the conical end of the second conical surface structure are arranged in the same direction; the clamping device aims at solving the problems that when an existing clamping device is used for clamping a cylindrical workpiece with an annular flange outer wall, the cylindrical workpiece is prone to falling off, and clamping is not stable.

Description

Technical Field

[0001] The utility model relates to the technical field of clamping of cylindrical workpieces, and specifically, to a clamping mechanism and device for cylindrical workpieces. Background Art

[0002] An industrial robot is a multi-joint manipulator or a robot with multiple degrees of freedom widely used in the industrial field. An industrial robot has a certain degree of automation. It can be controlled to move by manually operating a teach pendant by a human, or it can run according to a pre-programmed procedure. It can perform various industrial processing and manufacturing functions relying on its own power source and control ability. At present, with the continuous development of China's social economy and the continuous improvement of the automation level, industrial robots are widely used in various industrial fields such as automobile manufacturing, welding, and chemical industry, and the demand for special fixtures for industrial robots is also increasing day by day. Industrial robot fixtures can be classified according to their usage characteristics as: General fixtures: such as vises, chucks, etc., which are universal and can clamp workpieces of different types and shapes, including but not limited to cylindrical workpieces, rectangular workpieces, etc. The shapes and sizes of such fixtures have been standardized. Special fixtures: are manufactured separately for the need of clamping or fixing a workpiece during single-piece processing. The working object of such a fixture is single, and it is manufactured and used separately by a processing manufacturer, and the scope of use is small. Modular fixtures: such fixtures are composed of various standard parts, and they are usually assembled by a manufacturer for single-piece or small-batch production.

[0003] Most of the industrial robot fixtures for clamping cylindrical workpieces currently sold on the market use frictional fixation and rely on the contact area between the workpiece and the fixture to fix the workpiece. If the side wall of the workpiece to be clamped has a flange, then during clamping, the flange contacts the fixture, and due to the reduced contact area, there is a high probability of safety accidents such as the workpiece falling off, resulting in accidents. Therefore, in order to effectively improve the clamping stability and safety of the fixture and enable it to achieve reliable and safe positioning when clamping workpieces, it is now necessary to improve the fixture structure.

[0004] For example, Chinese Patent CN220994511U discloses an industrial robot fixture for clamping a grooved workpiece with an open cover, including a cylinder, a first clamping portion, and a second clamping portion; two pneumatic joints are rotatably arranged in the cylinder; the two pneumatic joints are respectively connected to the first clamping portion and the second clamping portion; an air pipe joint is arranged on the cylinder; the air pipe joint supplies air pressure into and out of the cylinder to drive the two pneumatic joints to swing, and drives the first clamping portion and the second clamping portion to move away from or close to each other; an open cover claw is further arranged at the end of the first clamping portion; the utility model solves the problem that the existing open cover fixture cannot clamp a bottle body or other cylindrical workpiece where the cover is located.

[0005] However, in the prior art, there are still problems of unstable clamping of cylindrical materials with prominent outer edges and difficulty in changing diameters. Summary of the Utility Model

[0006] The utility model discloses a clamping mechanism and device for cylindrical workpieces to solve the problems that the existing clamping devices are prone to falling off and have unstable clamping when clamping cylindrical workpieces with annular flange outer walls.

[0007] To solve the above problems, the utility model adopts the following technical means:

[0008] A clamping mechanism for cylindrical workpieces includes:

[0009] A first swing arm, one end of which is connected to a power mechanism, and the other end is configured with a first arc-shaped abutting portion;

[0010] A second swing arm, one end of which is connected to a power mechanism, and the other end is configured with a second arc-shaped abutting portion;

[0011] The concave arc surfaces of the first arc-shaped abutting portion and the second arc-shaped abutting portion are arranged opposite to each other, and the concave arc surfaces of the first arc-shaped abutting portion and the second arc-shaped abutting portion are respectively configured with a first conical surface structure and a second conical surface structure;

[0012] The conical ends of the first conical surface structure and the second conical surface structure are arranged in the same direction.

[0013] Preferably, the conical ends of the first conical surface structure and the second conical surface structure are arranged downward.

[0014] Furthermore, the first conical surface structure includes a first arc-shaped cylinder constructed on the lower side of the concave arc surface of the first arc-shaped abutting portion. The first arc-shaped cylinder is coaxially arranged with the concave arc surface of the first arc-shaped abutting portion. The top end of the first arc-shaped cylinder is coaxially connected to a first conical arc-shaped plate, and the inner diameter of the first conical arc-shaped plate gradually decreases from bottom to top.

[0015] Even further, the second conical surface structure includes a second arc-shaped cylinder constructed on the lower side of the concave arc surface of the second arc-shaped abutting portion. The second arc-shaped cylinder is coaxially arranged with the concave arc surface of the second arc-shaped abutting portion. The top end of the second arc-shaped cylinder is coaxially connected to a second conical arc-shaped plate, and the inner diameter of the second conical arc-shaped plate gradually decreases from bottom to top.

[0016] Even further, the first swing arm includes a first positioning block detachably connected to the power mechanism. One end of the first positioning block is connected to the first arc-shaped abutting portion, and the other end is configured with a first clamping groove detachably connected to the power mechanism.

[0017] Furthermore, the second swing arm includes a second positioning block detachably connected to the power mechanism, one end of the second positioning block is connected to the second arc-shaped abutting portion, and the other end is configured with a second slot detachably connected to the power mechanism.

[0018] In addition, a cylindrical workpiece clamping device includes the aforementioned cylindrical workpiece clamping mechanism;

[0019] It also includes a working cylinder as a power mechanism, wherein the working end of the working cylinder is connected to an arc-shaped push plate, and one end of the first swing arm and the second swing arm are respectively connected to the arc-shaped push plate;

[0020] The operating cylinder is used to drive the first swing arm and the second swing arm to move toward each other or relative to each other.

[0021] Furthermore, a flange is installed at the end of the working cylinder opposite to the first swing arm or the second swing arm, the axis of the flange is arranged parallel to the axis of the first arc-shaped abutment portion or the second arc-shaped abutment portion, the top surface of the flange is coaxially structured with an abutment plate, and the flange is structured with a plurality of positioning holes around the abutment plate.

[0022] During use, the utility model has the following beneficial effects:

[0023] When a clamping mechanism is used to clamp a cylindrical workpiece with a flange on the outer wall, a power mechanism is used to control the first swing arm and the second swing arm to move toward or relative to each other, so that the cylindrical workpiece is clamped when the first swing arm and the second swing arm move toward each other, and the cylindrical workpiece is released when the first swing arm and the second swing arm move relative to each other. The first conical surface structure on the first swing arm and the second conical surface structure on the second swing arm can be used to allow the outer edge of the workpiece to be clamped to be supported on the conical surface surrounded by the first conical surface structure and the second conical surface structure, thereby preventing the existing clamp from directly clamping an object with a protruding outer edge and causing it to fall.

[0024] The conical surface of the conical surface is used to fit into the groove formed by the protruding outer edge of the outer wall of the cylindrical workpiece, so that it is convenient to fix it using the conical surface instead of using friction and the force generated by high-pressure gas to push the clamping jaws like traditional clamps. It will not fall off in the event of an accident, thereby increasing safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of the utility model from the first viewing angle.

[0026] Figure 2 This is a schematic diagram of the structure of the utility model from a second viewing angle.

[0027] Among them, 100 - the first swing arm, 110 - the first conical surface structure, 111 - the first arc-shaped cylinder, 112 - the first conical arc-shaped plate, 120 - the first positioning block, 130 - the first arc-shaped abutting portion, 200 - the second swing arm, 300 - the first card slot, 400 - the operating cylinder, 500 - the flange, 600 - the abutting disc, 700 - the positioning hole. Detailed implementation manners

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. Usually, the components of the embodiments of the present utility model described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0030] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0031] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0032] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship when the product of the present utility model is normally placed, or the orientation or positional relationship commonly understood by those skilled in the art. It 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 should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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.

[0034] Please refer to Figure 1 and Figure 2 As shown, a cylindrical workpiece clamping mechanism comprises:

[0035] A first swing arm 100, one end of which is connected to the power mechanism, and the other end of which is configured with a first arc-shaped abutment portion 130;

[0036] A second swing arm 200, one end of which is connected to the power mechanism and the other end of which is provided with a second arc-shaped abutment portion;

[0037] The first arc-shaped abutting portion 130 and the concave arc-shaped surface of the second arc-shaped abutting portion are arranged opposite to each other, and the concave arc-shaped surfaces of the first arc-shaped abutting portion 130 and the second arc-shaped abutting portion are respectively configured with a first conical surface structure 110 and a second conical surface structure;

[0038] The tapered ends of the first tapered surface structure 110 and the second tapered surface structure are arranged in the same direction.

[0039] In this way, when the clamping mechanism is used to clamp a cylindrical workpiece with a flange on the outer wall, the power mechanism is used to control the first swing arm 100 and the second swing arm 200 to move toward or relative to each other, so that the cylindrical workpiece is clamped when the first swing arm 100 and the second swing arm 200 move toward each other, and the cylindrical workpiece is released when the first swing arm 100 and the second swing arm 200 move relative to each other. The first conical surface structure 110 on the first swing arm 100 and the second conical surface structure on the second swing arm 200 can be used to allow the outer edge of the workpiece to be clamped to be supported on the conical surface surrounded by the first conical surface structure 110 and the second conical surface structure, thereby avoiding the situation where the existing clamp is easy to fall when directly clamping an object with a protruding outer edge.

[0040] The conical surface of the conical surface is used to fit into the groove formed by the protruding outer edge of the outer wall of the cylindrical workpiece, so that it is convenient to fix it using the conical surface instead of using friction and the force generated by high-pressure gas to push the clamping jaws like traditional clamps. It will not fall off in the event of an accident, thereby increasing safety.

[0041] Furthermore, the conical ends of the first conical surface structure 110 and the second conical surface structure are arranged downward.

[0042] The conical surface formed by the first conical surface structure 110 and the second conical surface structure forms an inverted conical structure, thereby facilitating receiving the workpiece.

[0043] Furthermore, the first conical structure 110 includes a first arc tube 111 constructed on the lower side of the sunken arc surface of the first arc abutting portion 130, the first arc tube 111 is coaxially arranged with the sunken arc surface of the first arc abutting portion 130, the top end of the first arc tube 111 is coaxially connected to the first conical arc plate 112, and the inner diameter of the first conical arc plate 112 gradually decreases from bottom to top.

[0044] Moreover, the second conical surface structure includes a second arc tube constructed on the lower side of the indented arc surface of the second arc-shaped abutting portion, the second arc tube is coaxially arranged with the indented arc surface of the second arc-shaped abutting portion, the top end of the second arc tube is coaxially connected to the second conical arc plate, and the inner diameter of the second conical arc plate gradually decreases from bottom to top.

[0045] In this way, the cylindrical clamping cavity formed by the first arc-shaped cylinder 111 and the second arc-shaped cylinder can be embedded in the groove formed between the outer wall of the cylindrical component and the protruding outer edge, so as to achieve good support for the workpiece during the clamping process and prevent the workpiece from slipping. In addition, the conical clamping cavity formed by the first conical surface arc plate 112 and the second conical surface arc plate can use its conical surface to provide good support to the bottom side of the protruding outer edge.

[0046] Moreover, the use of the conical surface arrangement can also allow the clamping mechanism of the present application to have a larger diameter variation range, and can stably clamp objects of different sizes.

[0047] In order to enable the first swing arm 100 and the second swing arm 200 to be installed, the first swing arm 100 includes a first positioning block 120 that is detachably connected to the power mechanism, one end of the first positioning block 120 is connected to the first arc-shaped abutment portion 130, and the other end is constructed with a first slot 300 that is detachably connected to the power mechanism.

[0048] Moreover, the second swing arm 200 includes a second positioning block detachably connected to the power mechanism, one end of the second positioning block is connected to the second arc-shaped abutting portion, and the other end is configured with a second slot detachably connected to the power mechanism.

[0049] In addition, the present application also provides a cylindrical workpiece clamping device, comprising the aforementioned cylindrical workpiece clamping mechanism;

[0050] It further includes an operating cylinder 400 as a power mechanism. An arc-shaped push plate is connected to the operating end of the operating cylinder 400. One ends of the first swing arm 100 and the second swing arm 200 are respectively connected to the arc-shaped push plate;

[0051] The operating cylinder 400 is used to drive the first swing arm 100 and the second swing arm 200 to move towards each other or move relative to each other.

[0052] In this way, only by controlling the start and stop of the operating cylinder 400, the movement of the first swing arm 100 and the second swing arm 200 can be realized.

[0053] Moreover, a flange plate 500 is installed at one end of the operating cylinder 400 opposite to the first swing arm 100 or the second swing arm 200. The axis of the flange plate 500 is arranged parallel to the axis of the first arc-shaped abutting portion 130 or the axis of the second arc-shaped abutting portion. Abutting disk 600 is coaxially constructed on the top surface of the flange plate 500, and a number of positioning holes 700 are constructed on the flange plate 500 around the abutting disk 600.

[0054] Genorui uses the flange plate 500 with a vertical axis to connect with the robotic arm. The arrangement of the abutting disk and the positioning holes 700 can stably abut against the connection position of the robotic arm by using the abutting disk 600, so as to cooperate with the surrounding positioning holes 700 to achieve a stable connection with the robotic arm.

[0055] Specifically, the aforementioned arc-shaped push plate and the operating cylinder 400 can refer to the description in the Chinese patent CN220994511U in the prior art.

[0056] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A cylindrical workpiece clamping mechanism, characterized in that: include: A first swing arm (100), one end of which is connected to the power mechanism and the other end of which is provided with a first arc-shaped abutment portion (130); A second swing arm (200), one end of which is connected to the power mechanism and the other end of which is provided with a second arc-shaped abutment portion; The first arc-shaped abutting portion (130) and the concave arc-shaped surface of the second arc-shaped abutting portion are arranged opposite to each other, and the concave arc-shaped surfaces of the first arc-shaped abutting portion (130) and the second arc-shaped abutting portion are respectively configured with a first conical surface structure (110) and a second conical surface structure; The conical ends of the first conical surface structure (110) and the second conical surface structure are arranged in the same direction.

2. A cylindrical workpiece clamping mechanism according to claim 1, characterized in that: The conical ends of the first conical surface structure (110) and the second conical surface structure are arranged downwards.

3. A cylindrical workpiece clamping mechanism according to claim 1, characterized in that: The first conical surface structure (110) comprises a first arc-shaped cylinder (111) constructed on the lower side of the inwardly sunken arc surface of the first arc-shaped abutting portion (130); the first arc-shaped cylinder (111) is coaxially arranged with the inwardly sunken arc surface of the first arc-shaped abutting portion (130); the top end of the first arc-shaped cylinder (111) is coaxially connected to a first conical surface arc plate (112); and the inner diameter of the first conical surface arc plate (112) gradually decreases from bottom to top.

4. A cylindrical workpiece clamping mechanism according to claim 1, characterized in that: The second conical surface structure includes a second arc tube constructed on the lower side of the inwardly sunken arc surface of the second arc-shaped abutting portion, the second arc tube is coaxially arranged with the inwardly sunken arc surface of the second arc-shaped abutting portion, the top end of the second arc tube is coaxially connected to the second conical arc plate, and the inner diameter of the second conical arc plate gradually decreases from bottom to top.

5. A cylindrical workpiece clamping mechanism according to claim 1, characterized in that: The first swing arm (100) comprises a first positioning block (120) detachably connected to the power mechanism, one end of the first positioning block (120) is connected to the first arc-shaped abutment portion (130), and the other end is provided with a first clamping groove (300) detachably connected to the power mechanism.

6. A cylindrical workpiece clamping mechanism according to claim 1, characterized in that: The second swing arm (200) comprises a second positioning block detachably connected to the power mechanism, one end of the second positioning block is connected to the second arc-shaped abutment portion, and the other end is provided with a second clamping groove detachably connected to the power mechanism.

7. A cylindrical workpiece clamping device, characterized in that: A cylindrical workpiece clamping mechanism comprising any one of claims 1 to 6; It also includes an operating cylinder (400) as a power mechanism, the operating end of the operating cylinder (400) is connected to an arc-shaped push plate, and one end of the first swing arm (100) and one end of the second swing arm (200) are respectively connected to the arc-shaped push plate; The operating cylinder (400) is used to drive the first swing arm (100) and the second swing arm (200) to move toward each other or relative to each other.

8. A cylindrical workpiece clamping device according to claim 7, characterized in that: A flange (500) is installed at the end of the working cylinder (400) opposite to the first swing arm (100) or the second swing arm (200); the axis of the flange (500) is arranged parallel to the axis of the first arc-shaped abutting portion (130) or the second arc-shaped abutting portion; the top surface of the flange (500) is coaxially configured with an abutting plate (600); and a plurality of positioning holes (700) are configured on the flange (500) around the abutting plate (600).

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