Back-pulling clamping plate primary and secondary claw structure

Abstract

The utility model relates to a rear-pulling clamping plate female claw structure, and belongs to the technical field of turning machine tool fixtures. According to the structure, a backward pulling chuck is movably connected with chuck sliding seats, and the three chuck sliding seats are evenly distributed in the circumferential direction; the upper surface of each chuck sliding seat is movably connected with a female claw; a first T-shaped groove is formed in the female claw in the radial direction, the T-shaped block is in sliding fit with the first T-shaped groove, and lower positioning teeth are arranged on the upper surface of the female claw. Upper positioning teeth are arranged on the lower surfaces of the sub-claws, the upper positioning teeth are meshed with the lower positioning teeth, and the length direction of the meshed teeth is the tangential direction of the circumference; a countersunk head groove is formed in the upper surface of the sub claw, and a first screw is in threaded connection with the T-shaped block through the countersunk head groove. According to the primary-secondary claw structure, a comb tooth meshed connecting structure is adopted, positioning is accurate, adjustment is convenient, the clamping range of the secondary claw is large, and the using effect is good.

Description

Technical Field

[0001] The utility model relates to a rear pull card plate female claw structure, belonging to the technical field of a turning machine tool fixture. Background Art

[0002] The clamping jaws of the back-pull chuck and the chuck slide are positioned and locked by the cross key structure, and different jaws need to be replaced for different diameters. The connection part of the clamping jaws has high technical requirements, and the production cost of a single set of clamping jaws is high. If the positioning surfaces are not close together, the clamping effect of the workpiece will also be affected. At present, in the case of frequent replacement of processed parts, the clamping jaws of the back-pull chuck are made into a mother-and-child jaw mechanism. Common mother-and-child jaw structures include structures that are locked by positioning arc surface positioning screws, and structures that are connected by cross keys.

[0003] The cross key structure has the same high cost problem as before, and the gap between the parent and child jaws of the cross key structure is small, which makes it inconvenient to replace the child jaws and takes a long time to assist, affecting the processing efficiency. The parent and child jaws of the arc positioning structure, when the operator replaces the child jaws, if there is a gap between the child jaw and the positioning arc of the mother jaw, the clamping effect of the child jaw cannot be guaranteed. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a rear pull-plate mother claw structure, which adopts a comb-teeth meshing connection structure, which is not only accurate in positioning and convenient in adjustment, but also has a large clamping range of the child claw and good use effect.

[0005] In order to solve the above problems, the specific technical scheme of the utility model is as follows: a rear-pull chuck plate and female claw structure, which is movably connected to the chuck slide on the rear-pull chuck, and three chuck slides are evenly distributed along the circumferential direction; the female claw is movably connected to the upper surface of each chuck slide; a first T-slot is provided in the radial direction of the female claw, and the T-block slides with the first T-slot slidingly cooperate, and a lower positioning tooth is provided on the upper surface of the female claw; an upper positioning tooth is provided on the lower surface of the sub-claw, and the upper positioning tooth is meshed with the lower positioning tooth, and the length direction of the meshing tooth type is the tangential direction of the circumference; a countersunk groove is provided on the upper surface of the sub-claw, and the first screw is threadedly connected to the T-block through the countersunk groove.

[0006] The chuck slide is provided with a radial second T-slot, and the second screw passes through the female claw and is connected with the second T-slot of the chuck slide.

[0007] The outer edge of the chuck slide is provided with a boss, and the outer edge of the bottom of the female claw is provided with a limit platform, and the limit platform is seated and limited on the boss.

[0008] A countersunk groove is provided below the first T-slot of the female claw, the top diameter of the countersunk groove is larger than the width of the first T-slot, and the second screw is located in the countersunk groove at the lower end of the female claw.

[0009] The inner end of the sub-claw extends out of the end surface of the female claw and contacts the outer circumferential surface of the workpiece.

[0010] The tooth shape of the upper positioning teeth and the lower positioning teeth is 1.5 mm×90°.

[0011] The rear pull plate female claw structure of the utility model adopts a positioning tooth meshing structure of the female claw and the child claw, which not only has accurate positioning but also can be adjusted radially in micro amounts, thus saving processing costs and repeated installation and adjustment procedures, and greatly improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is the front view of the rear pull card plate female claw structure.

[0013] Figure 2 It is a side view of the female claw structure of the rear pull card plate.

[0014] Figure 3 This is a top view of the rear pull card plate mother claw structure. DETAILED DESCRIPTION

[0015] like Figures 1 to 3 As shown, a rear pull chuck plate and female claw structure, a rear pull chuck 1 is movably connected to a chuck slide 2, and three chuck slides 2 are evenly distributed along the circumferential direction; a female claw 3 is movably connected to the upper surface of each chuck slide 2; a first T-shaped slot 6 is provided in the radial direction of the female claw 3, and a T-shaped block 5 is slidably matched with the first T-shaped slot 6, and a lower positioning tooth 7 is provided on the upper surface of the female claw 3, and the tooth shape of the positioning tooth is 1.5mm×90°; an upper positioning tooth 8 is provided on the lower surface of the sub-claw 4, and the upper positioning tooth 8 is meshed with the lower positioning tooth 7, and the length direction of the meshing tooth shape is the tangential direction of the circumference; a first countersunk groove is provided on the upper surface of the sub-claw 4, and a first screw 9 is threadedly connected to the T-shaped block 5 through the first countersunk groove. The inner end of the sub-claw 4 extends out of the end face of the female claw 3 and contacts the outer cylindrical surface of the workpiece.

[0016] The chuck slide 2 is provided with a radial second T-slot 10, and the second screw 11 passes through the female claw 3 and is connected to the second T-slot 10 of the chuck slide 2. A boss 12 is provided on the outer edge of the chuck slide 2, and a limit platform is provided on the outer edge of the bottom of the female claw 3. The limit platform is seated and limited on the boss 12, ensuring the radial positioning reference of the female claw.

[0017] A second countersunk groove is provided below the first T-slot 6 of the female claw 3, the top diameter of the second countersunk groove is larger than the width of the first T-slot 6, and the second screw 11 is located in the second countersunk groove at the lower end of the female claw 3. The female claw 3 is positioned with the chuck slide 2 by the second screw 11 in the second countersunk groove below the first T-slot 6.

[0018] The working process of adjusting the structure of the mother jaw of the rear pull chuck is as follows: since the upper positioning teeth 8 on the lower surface of the child jaw 4 are meshed with the lower positioning teeth 7, the distance value of each inward or outward movement of a tooth pitch is fixed, so according to the actual adjustment amount, the first screw 9 is loosened, and the T-block 5 slides in the first T-slot 6. When the position is adjusted, the first screw 9 is tightened to press the upper positioning teeth 8 and the lower positioning teeth 7. After starting the rear pull chuck 1, the child jaw 4 can achieve clamping cooperation with the workpiece. The position of the mother jaw 3 of the tooling is always fixed with the position of the chuck slide 2, and relies on the boss 12 as a reference, so the adjustment value deviation of the child jaw 4 is small, thereby improving the clamping accuracy.

Claims

1. A rear pull plate female claw structure, characterized in that: A chuck slide (2) is movably connected to the rear pull chuck (1), and three chuck slides (2) are evenly distributed along the circumferential direction; a female claw (3) is movably connected to the upper surface of each chuck slide (2); a first T-shaped groove (6) is provided in the radial direction of the female claw (3), and the T-shaped block (5) is slidably matched with the first T-shaped groove (6); a lower positioning tooth (7) is provided on the upper surface of the female claw (3); an upper positioning tooth (8) is provided on the lower surface of the sub-claw (4), and the upper positioning tooth (8) is meshed with the lower positioning tooth (7), and the length direction of the meshing tooth profile is the tangential direction of the circumference; a countersunk groove is provided on the upper surface of the sub-claw (4), and a first screw (9) is threadedly connected to the T-shaped block (5) through the countersunk groove.

2. The rear pull plate female claw structure according to claim 1, characterized in that: The chuck slide (2) is provided with a radial second T-slot (10), and the second screw (11) passes through the female claw (3) and is connected to the second T-slot (10) of the chuck slide (2).

3. The rear pull plate female claw structure according to claim 2, characterized in that: The outer edge of the chuck slide (2) is provided with a boss (12), and the outer edge of the bottom of the female claw (3) is provided with a limit platform, which is seated on and limited on the boss (12).

4. The rear pull plate female claw structure according to claim 2, characterized in that: A countersunk groove is provided below the first T-slot (6) of the female claw (3), the top diameter of the countersunk groove being larger than the width of the first T-slot (6), and the second screw (11) is located in the countersunk groove at the lower end of the female claw (3).

5. The rear pull plate female claw structure according to claim 1, characterized in that: The inner end of the sub-claw (4) extends out of the end surface of the female claw (3) and contacts the outer cylindrical surface of the workpiece.

6. The rear pull plate female claw structure according to claim 1, characterized in that: The tooth shape of the upper positioning teeth (8) and the lower positioning teeth (7) is 1.5 mm×90°.

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