Three-jaw clamping unit and three-jaw clamping jig

Abstract

The three-jaw clamping unit comprises a chuck, three positioning blocks and three clamping jaws, the three positioning blocks are evenly distributed on the circumference of the chuck, a gap is reserved between every two adjacent positioning blocks to form an avoiding channel, and the three positioning blocks jointly define a positioning space. The three clamping jaws are installed on the chuck in a sliding mode, the positions of the three clamping jaws are matched with the positions of the receding channels, the three clamping jaws synchronously slide into or slide out of the positioning space through the corresponding receding channels, and the purpose that a workpiece is located in the center of the chuck every time the clamping jaws clamp the workpiece is achieved. The clamping and positioning precision can be improved, clamping and positioning are rapid, the repeated clamping stability is high, the productivity is improved, the reject ratio is reduced, and therefore the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of clamping jigs, in particular to a three-jaw clamping unit and a three-jaw clamping jig. Background Art

[0002] When drilling workpieces such as center shafts, due to the different outer diameters of the workpieces, they are easily misaligned and the clamping and positioning accuracy is poor, resulting in poor drilling accuracy, low processing efficiency, and low qualified rate of processed products, thereby increasing production costs. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a three-jaw clamping unit and a three-jaw clamping fixture that can quickly clamp and position, improve processing accuracy and processing efficiency, and reduce defective rates and production costs.

[0004] In one aspect, an embodiment of the present invention provides a three-jaw clamping unit comprising a chuck, three positioning blocks, and three jaws. The three positioning blocks are evenly distributed along the circumference of the chuck, with a gap between two adjacent positioning blocks forming an escape channel. The three positioning blocks collectively enclose a positioning space. The three jaws are slidably mounted on the chuck and positioned to align with the escape channels. The three jaws slide synchronously into and out of the positioning space through the corresponding escape channels.

[0005] According to some embodiments of the present invention, the chuck is provided with a slot, the bottom of the claw is provided with a groove, a plunger is installed in the matching space formed by the slot and the groove, and the chuck is movably connected to the claw through the plunger.

[0006] According to some embodiments of the present invention, the chuck is provided with a guide rail, the claw is provided with a slider, and the slider is mounted on the guide rail;

[0007] Alternatively, the chuck is provided with a guide rail, the clamping claw is provided with a sliding groove, and the clamping claw is connected to the clamping claw via the sliding groove.

[0008] According to some embodiments of the present invention, the claw is provided with a contoured surface, and the contoured surface faces the positioning space.

[0009] According to some embodiments of the present invention, the positioning block includes a connected abutment segment and a base segment, the base segment is mounted on the chuck, and the abutment segments of the three positioning blocks together enclose the positioning space.

[0010] According to some embodiments of the present invention, the abutting section is detachably mounted on the base section.

[0011] On the other hand, an embodiment of the present invention further provides a three-jaw clamping fixture, comprising the above-mentioned three-jaw clamping unit and a base, wherein the three-jaw clamping unit is installed on the base.

[0012] According to some embodiments of the present invention, there are multiple three-jaw clamping units, and the multiple three-jaw clamping units are distributed in a queue on the base.

[0013] According to some embodiments of the present invention, the base is provided with an oil pipe connecting block and an oil pipe, the oil pipe is embedded in the base, the oil pipe connecting block is provided with an oil pipe joint, and the oil pipe joint is connected to the oil pipe.

[0014] According to some embodiments of the present invention, the base is equipped with a chip guard plate, and the chip guard plate is vertically arranged on the base.

[0015] The embodiments of the present invention have at least the following beneficial effects:

[0016] The three-jaw clamping unit comprises a chuck, three positioning blocks, and three jaws. The three positioning blocks are evenly distributed along the circumference of the chuck, with a gap between two adjacent positioning blocks forming an escape channel. The three positioning blocks collectively enclose a positioning space. The three jaws are slidably mounted on the chuck and adapted to fit within the escape channel, allowing the jaws to slide into or out of the positioning space through the escape channel. This ensures that the workpiece is always centered on the chuck when the jaws are clamped, improving clamping and positioning accuracy, enabling rapid clamping and positioning, and high stability during repeated clamping. This improves productivity, reduces defect rates, and thus reduces production costs.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 This is a schematic structural diagram of a three-claw clamping unit according to an embodiment of the present invention;

[0020] Figure 2 for Figure 1 A schematic structural diagram of the positioning block of the three-jaw clamping unit is shown;

[0021] Figure 3 for Figure 1 A schematic structural diagram of the clamping jaws of the three-jaw clamping unit is shown;

[0022] Figure 4This is a schematic structural diagram of a three-jaw clamping fixture according to an embodiment of the present invention;

[0023] Figure 5 for Figure 4 A top view of a three-jaw gripping fixture is shown.

[0024] Reference numerals:

[0025] Base 100 , oil pipe connecting block 110 , oil pipe joint 111 , chip guard plate 130 , handle 140 , chuck 200 , slot 210 , through hole 220 , claw 300 , clamping surface 310 , groove 320 , positioning block 400 , abutment section 410 , base section 420 . DETAILED DESCRIPTION

[0026] The following describes embodiments of the present invention in detail. 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 intended only to explain the present invention and are not to be construed as limiting the present invention.

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

[0028] In the description of this utility model, "several" means one or more, "multiple" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, and "above," "below," and "within" are understood to include the number itself. The use of terms such as "first" and "second" is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, or implicitly indicating the number or order of the technical features indicated.

[0029] In the description of the present invention, unless otherwise clearly defined, words such as “set,” “install,” “connect,” and “connected” should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above words in the present invention based on the specific content of the technical solution.

[0030] Please refer to Figures 1 to 4, this embodiment discloses a three-jaw clamping fixture, including a chuck 200, three positioning blocks 400 and three jaws 300. The three positioning blocks 400 are evenly distributed on the circumference of the chuck 200, and a gap is left between two adjacent positioning blocks 400 to form an avoidance channel. The three positioning blocks 400 together enclose a positioning space. The three jaws 300 are respectively slidably mounted on the chuck 200 and their positions are adapted to the positions of the avoidance channels. The three jaws 300 synchronously slide in or out of the positioning space through the corresponding avoidance channels. During processing, the three jaws 300 move inward simultaneously along the avoidance channel, and the jaws 300 clamp the workpiece. After processing, the three jaws 300 move outward simultaneously along the avoidance channel, and the jaws 300 release the workpiece to take out the processed workpiece. The three positioning blocks 400 are evenly distributed on the circumference of the chuck 200, and the three claws 300 are respectively slidably installed on the chuck 200 and adapted to the avoidance channel, so that the workpiece is in the center position of the chuck 200 every time the claws 300 are clamped; the clamping positioning accuracy is improved, and the repeated clamping stability is high, which can improve productivity, reduce defective rate, and thus reduce production costs.

[0031] Please refer to Figure 2 and Figure 3 The chuck 200 is provided with a slot 210, and the bottom of the jaw 300 is provided with a groove 320. A plunger is installed in the space formed by the slot 210 and the groove 320, and the chuck 200 is movably connected to the jaw 300 via the plunger. The plunger is inserted into the slot 210, and the chuck 200 is movably connected to the jaw 300 via the plunger, thereby installing the jaw 300 on the chuck 200. The plunger drives the jaw 300 to move inward or outward along the slot 210, clamping or loosening the workpiece.

[0032] It should be noted that the jaw 300 can also slide into or out of the positioning space via a guide rail. In this case, the chuck 200 is provided with a guide rail and the jaw 300 is provided with a slider. Alternatively, the chuck 200 is provided with a guide rail and the jaw 300 is provided with a slide groove, and the jaw 300 is connected to the jaw 300 via the slide groove. The slider of the jaw 300 is mounted on the guide rail. The jaw 300 slides inward or outward along the guide rail to clamp or release the workpiece.

[0033] Please refer to Figure 2 and Figure 3 The clamping claw 300 is provided with a contoured surface 310, which faces the positioning space, thereby improving the clamping and positioning accuracy and achieving high stability in repeated clamping.

[0034] Please refer to Figure 2 and Figure 4The positioning block 400 includes a connected abutment section 410 and a base section 420. The base section 420 is mounted on the chuck 200. The abutment sections 410 of the three positioning blocks 400 collectively form a positioning space. The abutment sections 410 are detachably mounted on the base section 420. A gap is left between two adjacent abutment sections 410, forming an escape space. The jaws 300 can move in the escape space to clamp and release the workpiece.

[0035] Please refer to Figure 2 and Figure 5 The chuck 200 is provided with a through hole 220, i.e., the chuck 200 is a hollow structure, which reduces the weight of the chuck 200 while maintaining its strength and functionality. After the workpiece is placed in the through hole 220, the jaws 300 move inward or outward along the clamping groove 210 to clamp or release the workpiece.

[0036] Please refer to Figure 4 This embodiment also provides a three-jaw clamping fixture, including the above-mentioned three-jaw clamping unit and a base 100, and the three-jaw clamping unit is installed on the base 100.

[0037] Please refer to Figure 4 and Figure 5 The number of the three-jaw clamping units is multiple, and the multiple three-jaw clamping units are arranged in a queue on the base 100. This enables multi-station simultaneous processing and improves processing efficiency.

[0038] Please refer to Figure 4 and Figure 5 The base 100 is equipped with a tubing block 110 and tubing embedded within the base 100. The tubing block 110 is equipped with a tubing connector 111, which is connected to the tubing. The three-jaw clamping fixture connects to an external oil station via tubing connector 111, achieving automatic clamping and loosening functions.

[0039] Please refer to Figure 4 and Figure 5 The base 100 is provided with a chip guard plate 130, which is vertically arranged on the base 100. The chip guard plate 130 blocks the chips flying out during processing, protecting the processing machine tool and the operator from being hurt by the chips.

[0040] Please refer to Figure 4 and Figure 5 Handles 140 are provided on both sides of the base 100 to facilitate grabbing and moving operations, thereby improving work efficiency and safety.

[0041] During use, the jig is connected to an external oil station via the oil pipe connector 111. The workpiece to be processed is placed on the chuck 200, and the abutment section 410 supports the workpiece for initial positioning, eliminating the need for the operator to manually hold the workpiece. The jig is activated, and the three jaws 300 simultaneously move inward along the slot 210, clamping the workpiece. After processing, the three jaws 300 simultaneously move outward along the slot 210, releasing the workpiece and removing the processed workpiece. The three positioning blocks 400 are evenly distributed on the circumference of the chuck 200, with a gap between two adjacent positioning blocks 400 to form an escape channel. The three positioning blocks 400 together enclose a positioning space. The three jaws 300 are slidably mounted on the chuck 200 and adapted to the escape channel. The jaws 300 slide in and out of the positioning space through the escape channel, ensuring that the workpiece is always centered on the chuck 200 when the jaws 300 clamp. Improve the clamping and positioning accuracy, fast clamping and positioning, high stability of repeated clamping, which can improve productivity, reduce defective rate, and thus reduce production costs.

[0042] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A three-claw clamping unit, characterized in that: include: chuck(200); Three positioning blocks (400), the three positioning blocks (400) are evenly distributed on the circumference of the chuck (200), a gap is left between two adjacent positioning blocks (400) to form an avoidance channel, and the three positioning blocks (400) together enclose a positioning space; Three clamping claws (300), the three clamping claws (300) are respectively slidably mounted on the chuck (200) and their positions are adapted to the positions of the avoidance channels, and the three clamping claws (300) synchronously slide into or out of the positioning space through the corresponding avoidance channels.

2. The three-jaw clamping unit according to claim 1, characterized in that: The chuck (200) is provided with a slot (210), the bottom of the claw (300) is provided with a groove (320), a plunger is installed in the matching space formed by the slot (210) and the groove (320), and the chuck (200) is movably connected to the claw (300) via the plunger.

3. The three-jaw clamping unit according to claim 1, characterized in that: The chuck (200) is provided with a guide rail, and the claw (300) is provided with a slider, and the slider is mounted on the guide rail; Alternatively, a guide rail is provided on the chuck (200), a sliding groove is provided on the clamping claw (300), and the clamping claw (300) is connected to the clamping claw (300) via the sliding groove.

4. The three-jaw clamping unit according to claim 2 or 3, characterized in that: The clamping claw (300) is provided with a contoured surface (310), and the contoured surface (310) faces the positioning space.

5. The three-jaw clamping unit according to claim 1, characterized in that: The positioning block (400) comprises a connected abutment section (410) and a base section (420); the base section (420) is mounted on the chuck (200); and the abutment sections (410) of the three positioning blocks (400) together enclose the positioning space.

6. The three-jaw clamping unit according to claim 5, characterized in that: The abutting section (410) is detachably mounted on the base section (420).

7. A three-jaw clamping fixture, characterized in that: It comprises the three-jaw clamping unit according to any one of claims 1 to 6 and a base (100), wherein the three-jaw clamping unit is mounted on the base (100).

8. The three-jaw clamping fixture according to claim 7, wherein the number of the three-jaw clamping units is multiple, and the multiple three-jaw clamping units are distributed in a queue on the base (100).

9. The three-jaw clamping fixture according to claim 7, characterized in that: The base (100) is provided with an oil pipe connecting block (110) and an oil pipe, the oil pipe is embedded in the base (100), the oil pipe connecting block (110) is provided with an oil pipe joint (111), and the oil pipe joint (111) is communicated with the oil pipe.

10. The three-jaw clamping fixture according to claim 7, 8 or 9, characterized in that: The base (100) is installed with a chip guard plate (130), and the chip guard plate (130) is vertically arranged on the base (100).

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