Floating type self-adjusting manual chuck

Abstract

The utility model belongs to the technical field of chucks, and particularly relates to a floating type self-adjusting manual chuck which comprises a chuck base and a plurality of clamping units distributed in the circumferential direction of the chuck base at intervals, and each clamping unit comprises a clamping jaw and a driving mechanism driving the clamping jaw to move in the radial direction of the chuck base. The driving mechanism comprises a rotating disc, a lead screw nut pair used for pushing the rotating disc to rotate, a driving gear meshed with a tooth part on the rotating disc, a driven gear coaxially fixed to the driving gear and a rack meshed with the driven gear, and the rack is fixed to the clamping jaws. According to the utility model, the lead screw nut pair is matched with the gear rack to clamp the pipe fitting, and the lead screw nut pair, the turntable and the driving gear are approximately positioned on the same plane, so that the parts of the driving mechanism are matched with one another, the space is saved, the overall thickness of the chuck is reduced, and the residual amount of the pipe fitting in the chuck is greatly saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of chucks, and particularly relates to a floating self-adjusting manual chuck. Background Art

[0002] A chuck is usually installed on a machine tool for clamping pipe fittings for a cutting device to cut. It generally includes a disc base, a chuck jaw, and a driving mechanism for driving the chuck jaw to move radially along the disc base. A perforation is provided at the central part of the disc base, and the pipe fitting penetrates through the perforation. Multiple chuck jaws move closer synchronously to clamp the pipe fitting.

[0003] The power execution mechanism of the chuck in the prior art is usually a worm and worm gear mechanism, which occupies a large space, resulting in a very thick overall chuck. When it clamps a pipe fitting for cutting, the remaining pipe fitting in the chuck is long at the end of cutting, causing great waste of materials. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is: to solve the problem that the power execution mechanism of the chuck in the prior art is a worm and worm gear mechanism, which occupies a large space, resulting in a very thick overall chuck. When it clamps a pipe fitting for cutting, the remaining pipe fitting in the chuck is long at the end of cutting, causing great waste of materials. Now, a floating self-adjusting manual chuck is provided.

[0005] The technical solution adopted by the utility model to solve its technical problem is: a floating self-adjusting manual chuck, including a disc base and a plurality of clamping units distributed at intervals along the circumference of the disc base. Each clamping unit includes a chuck jaw and a driving mechanism for driving the chuck jaw to move radially along the disc base;

[0006] The driving mechanism includes a turntable, a lead screw nut pair for pushing the turntable to rotate, a driving gear meshing with the tooth part on the turntable, a driven gear coaxially fixed with the driving gear, and a rack meshing with the driven gear. The rack is fixed to the chuck jaw.

[0007] Further, the lead screw nut pair includes a lead screw and a nut seat threadedly connected with the lead screw. A dial block protrudes from the nut seat, and a dial groove for the dial block to be inserted into is provided on the turntable.

[0008] Further, an end nut is provided at the end of the lead screw.

[0009] Further, a disc cover is covered on the disc base, and the two enclose a containing cavity for accommodating the driving mechanism. The disc cover is provided with an operation hole communicating with the containing cavity for the end nut to extend out.

[0010] Further, there are four clamping units, including two relatively arranged transverse clamping units and two relatively arranged longitudinal clamping units.

[0011] Further, there are two turntables. One turntable corresponds to two transverse clamping units and is a transverse driving turntable, and the other turntable corresponds to two longitudinal clamping units and is a longitudinal driving turntable. Both the transverse driving turntable and the longitudinal driving turntable are provided with two oppositely arranged tooth parts.

[0012] Further, a connecting shaft is provided between the disk base and the disk cover, and both the transverse driving turntable and the longitudinal driving turntable are sleeved on the connecting shaft.

[0013] Further, a fixed seat is fixed on the disk base, the lead screw passes through the fixed seat, and an elastic member is provided between the fixed seat and the end nut.

[0014] Further, the disk base is provided with a first slide rail, and the bottom of the claw is provided with a first slider adapted to the first slide rail.

[0015] Further, the disk base or the disk cover is provided with a second slide rail, and the nut seat is provided with a second slider adapted to the second slide rail.

[0016] The beneficial effects of the present utility model are as follows: The present utility model utilizes the cooperation of the lead screw-nut pair and the gear-rack to realize the clamping of the pipe fitting. The lead screw-nut pair, the turntable and the driving gear are roughly located in the same plane, so that while the components of the driving mechanism cooperate with each other, space is saved, the overall thickness of the chuck is reduced, and thus the remaining amount of the pipe fitting inside the chuck is greatly saved.

[0017] Other features and advantages of the present application will become clear through the following detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings. Description of the Drawings

[0018] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0019] Figure 1 is the structural schematic diagram of the present utility model;

[0020] Figure 2 is the sectional view of the present utility model;

[0021] Figure 3 is the structural schematic diagram of the present utility model from the first perspective after removing the disk cover;

[0022] Figure 4 is the structural schematic diagram of the present utility model from the second perspective after removing the disk cover;

[0023] Figure 5 is the bottom view of the present utility model after removing the disk cover;

[0024] Figure 6 is the three-dimensional schematic diagram of one of the clamping units;

[0025] Figure 7 is a top view of one of the clamping units;

[0026] Figure 8 is a schematic structural view of a lead screw-nut pair.

[0027] In the figure:

[0028] 1. Disc base; 101. Perforation;

[0029] 2. Clamping unit; 201. Claw; 202. Turntable; 2021. Tooth part; 2022. Dial groove; 203. Lead screw; 2031. Protrusion; 204. Nut seat; 2041. Dial block; 205. Driving gear; 206. Driven gear; 207. Rack; 208. End nut; 209. Fixed seat; 210. Elastic member; 211. Plain bearing;

[0030] 3. Disc cover; 301. Operation hole;

[0031] 4. Connecting shaft;

[0032] 5. First slide rail;

[0033] 6. Second slide rail. Detailed implementation mode

[0034] Now, the present utility model will be further described in detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only schematically showing the basic structure of the present utility model. Therefore, they only show the components related to the present utility model. Directions and references (such as up, down, left, right, etc.) can only be used to assist in the description of the features in the drawings. Therefore, the following detailed implementation mode is not adopted in a restrictive sense, and the scope of the claimed subject matter is only defined by the appended claims and their equivalent forms.

[0035] As shown in Figure 1 and Figure 3 and

[0036] As shown in Figure 2 , Figure 4 and Figure 5As shown, the driving mechanism includes a turntable 202, a lead screw nut pair for pushing the turntable 202 to rotate, a driving gear 205 meshing with the tooth part 2021 on the outer peripheral wall of the turntable 202, a driven gear 206 coaxially fixed with the driving gear 205, and a rack 207 meshing with the driven gear 206. The rack 207 is fixed to the claw 201 through a claw seat. A perforation for the pipe fitting to pass through is also provided at the central part of the turntable 202. The turntable 202, the lead screw nut pair, and the driving gear 205 are located on one side of the disc seat 1, and the driven gear 206, the claw 201, and the rack 207 are located on the other side of the disc seat 1. A protective cover is provided outside the driven gear 206 and the rack 207, and a synchronizing shaft is provided between the driving gear 205 and the driven gear 206. The synchronizing shaft passes through the disc seat 1.

[0037] First, manually operate the lead screw nut pair. The output end of the lead screw nut pair moves linearly, pushing the turntable 202 to rotate. The driving gear 205 meshing with the tooth part 2021 on the turntable 202 rotates synchronously, driving the driven gear 206 to rotate. The driven gear 206 meshes with the rack 207, driving the claw 201 to move radially to realize the clamping or loosening of the claw 201. In this application, the cooperation of the lead screw nut pair and the gear rack 207 is used to clamp the pipe fitting. The lead screw 203 nut pair, the turntable 202, and the driving gear 205 are generally located in the same plane, and the lead screw nut pair and the driven gear 206 are located outside the turntable 202, so that while the components of the driving mechanism cooperate with each other, space is saved, the overall thickness of the chuck is reduced, and thus the remaining amount of the pipe fitting inside the chuck is greatly saved.

[0038] In some examples, the lead screw nut pair includes a lead screw 203 and a nut seat 204 threadedly connected to the lead screw 203. A dial block 2041 protrudes from the nut seat 204, and the turntable 202 is provided with a dial groove 2022 for the dial block 2041 to be inserted into. The rotation of the lead screw 203 drives the nut seat 204 to reciprocate axially along the lead screw 203. The cooperation between the dial block 2041 on the nut seat 204 and the dial groove 2022 drives the turntable 202 to rotate clockwise or counterclockwise.

[0039] In some examples, as Figure 6 and Figure 7 shown, an end nut 208 is provided at the end of the lead screw 203. By turning the end nut 208, the lead screw 203 can be driven to rotate synchronously, thereby driving the nut seat 204 to make a linear reciprocating motion. The setting of the end nut 208 facilitates the operator to apply force.

[0040] In some examples, as Figure 1As shown, a disk cover 3 is provided outside the disk base 1. The disk base 1 is generally in a flat plate shape. A flange is formed on the outer peripheral wall of the disk cover 3 extending towards the disk base 1, so that the disk base 1 and the disk cover 3 enclose a receiving cavity for accommodating a driving mechanism. And the disk cover 3 is provided with an operation hole 301 communicating with the receiving cavity for the end nut 208 to extend out. An operator can turn the end nut 208 through the operation hole 301.

[0041] In some examples, such as Figure 1 and Figure 3 As shown, there are four clamping units 2, including two relatively arranged transverse clamping units and two relatively arranged longitudinal clamping units. The transverse clamping units and the longitudinal clamping units clamp the pipe fittings from the transverse and longitudinal directions respectively, and the transverse clamping units and the longitudinal clamping units are distributed in a vertically staggered manner, which can improve the straightening effect of small pipe fittings.

[0042] In some examples, such as Figure 2 and Figure 4 As shown, there are two turntables 202. One turntable 202 corresponds to two transverse clamping units and is a transverse driving turntable, and the other turntable 202 corresponds to two longitudinal clamping units and is a longitudinal driving turntable. Two relatively arranged tooth parts 2021 are provided on both the transverse driving turntable and the longitudinal driving turntable. The two tooth parts 2021 on the transverse driving turntable are respectively engaged with the two driving gears 205 on the transverse clamping units, and the two tooth parts 2021 on the longitudinal driving turntable are respectively engaged with the two driving gears 205 on the longitudinal clamping units; for the sake of clear display, Figure 4 The screw-nut pair of the two transverse clamping units is shown, while the screw-nut pair of the two longitudinal clamping units is not shown.

[0043] Each clamping unit 2 can correspond to a screw-nut pair, that is, the four clamping units 2 include four screw-nut pairs, or the two transverse clamping units correspond to one screw-nut pair, and the two longitudinal clamping units correspond to one screw-nut pair. At this time, the four clamping units 2 include two screw-nut pairs. The two transverse clamping units drive the transverse driving turntable to rotate through one screw-nut pair. The two tooth parts 2021 on the transverse driving turntable drive the two driving gears 205 to rotate, and then drive the two transverse jaws 201 to clamp or loosen. Similarly, the two longitudinal clamping units drive the longitudinal driving turntable to rotate through the other screw-nut pair. The two tooth parts 2021 on the longitudinal driving turntable drive the two driving gears 205 to rotate, and then drive the two longitudinal jaws 201 to clamp or loosen.

[0044] In some examples, a connecting shaft 4 is provided between the disk base 1 and the disk cover 3, and clamping grooves for the connecting shaft 4 to be inserted are formed on the end faces of the mutually approaching ends of the disk base 1 and the disk cover 3. The clamping grooves and the end face of the connecting shaft 4 are fixed by bolts. The transverse driving turntable and the longitudinal driving turntable are sleeved on the connecting shaft 4, and a gasket is provided between the two.

[0045] In some examples, as Figures 6 - 8 shown, a fixed seat 209 is fixed on the disk base 1. The lead screw 203 passes through the fixed seat 209, and an elastic member 210 is provided between the fixed seat 209 and the end nut 208. The elastic member 210 is a spring. A through hole for the lead screw 203 to pass through is formed in the central part of the fixed seat 209, and the lead screw 203 can rotate in the through hole. When cutting a pipe fitting, the position of the clamping jaw 201 is adjusted by rotating the lead screw 203 to clamp the pipe fitting. During the cutting process of the same pipe fitting, the adjustment amount of the lead screw 203 is usually unchanged, so that the position of the clamping jaw 201 remains unchanged. However, for the same pipe fitting, the pipe diameter is slightly different, and it may be too large or too small, resulting in the pipe fitting not being clamped tightly, causing looseness during cutting, or being clamped too tightly, causing deformation of the pipe fitting. The setting of the elastic member 210 can enable the entire lead screw nut pair to have a displacement space to prevent the above situation from occurring.

[0046] The fixed seat 209 is provided with a through hole for the lead screw 203 to pass through. Both ends of the through hole expand to form two stepped holes. The one close to the end nut 208 is the first stepped hole, and the one far from the end nut 208 is the second stepped hole. A plain bearing 211 is installed inside the first stepped hole, and the lead screw 203 protrudes radially to form a protruding portion 2031 that abuts against the second stepped hole.

[0047] In some examples, the disk base 1 is provided with a first slide rail 5, and the bottom of the clamping jaw 201 is provided with a first slider that cooperates with the first slide rail 5. The cooperation between the first slide rail 5 and the first slider can provide guidance for the radial movement of the clamping jaw 201.

[0048] In some examples, the disk base 1 or the disk cover 3 is provided with a second slide rail 6, and the nut seat 204 is provided with a second slider that cooperates with the second slide rail 6. The cooperation between the second slide rail 6 and the second slider can provide guidance for the linear movement of the nut seat 204.

[0049] Working principle:

[0050] First, the end nut 208 can be screwed through the operation hole 301, and the lead screw 203 rotates synchronously, thereby driving the nut seat 204 to perform a linear reciprocating motion. The dial block 2041 on the nut seat 204 cooperates with the dial groove 2022 on the turntable 202 to drive the turntable 202 to rotate. The driving gear 205 meshing with the tooth portion 2021 on the turntable 202 rotates synchronously, driving the driven gear 206 to rotate. The driven gear 206 meshes with the rack 207, driving the clamping jaw 201 to move radially to realize the clamping or loosening of the clamping jaw 201.

[0051] Based on the inspiration of the ideal embodiments of the present utility model, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this utility model. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A floating self-adjusting manual chuck, characterized in that: It includes a disk base (1) and a plurality of clamping units (2) circumferentially and spaced apart along the disk base (1). Each clamping unit (2) includes a claw (201) and a driving mechanism for driving the claw (201) to move radially along the disk base (1). The driving mechanism includes a turntable (202), a lead screw nut pair for pushing the turntable (202) to rotate, a driving gear (205) meshing with the tooth part (2021) on the outer peripheral wall of the turntable (202), a driven gear (206) coaxially fixed with the driving gear (205), and a rack (207) meshing with the driven gear (206). The rack (207) is fixed to the claw (201).

2. The floating self-adjusting manual chuck according to claim 1, wherein: The lead screw nut pair includes a lead screw (203) and a nut seat (204) threadedly connected to the lead screw (203). A dial block (2041) protrudes from the nut seat (204), and the turntable (202) is provided with a dial groove (2022) for the dial block (2041) to snap into.

3. The floating self-adjusting manual chuck according to claim 2, characterized in that: An end nut (208) is provided at the end of the lead screw (203).

4. The floating self-adjusting manual chuck according to claim 3, wherein: A disk cover (3) is covered on the disk base (1), and the two enclose a receiving cavity for accommodating the driving mechanism. The disk cover (3) is provided with an operation hole (301) communicating with the receiving cavity for the end nut (208) to protrude.

5. The floating self-adjusting manual chuck according to claim 4, characterized in that: There are four clamping units (2), including two relatively arranged horizontal clamping units and two relatively arranged vertical clamping units.

6. The floating self-adjusting manual chuck according to claim 5, wherein: There are two turntables (202). One turntable (202) corresponding to the two horizontal clamping units is a horizontal driving turntable, and the other turntable (202) corresponding to the two vertical clamping units is a vertical driving turntable. Both the horizontal driving turntable and the vertical driving turntable are provided with two relatively arranged tooth parts (2021).

7. The floating self-adjusting manual chuck according to claim 6, characterized in that: A connecting shaft (4) is provided between the disk base (1) and the disk cover (3). Both the horizontal driving turntable and the vertical driving turntable are sleeved on the connecting shaft (4).

8. The floating self-adjusting manual chuck according to claim 2, wherein: A fixing seat (209) is fixed on the disk base (1). The lead screw (203) passes through the fixing seat (209), and an elastic member (210) is provided between the fixing seat (209) and the end nut (208).

9. The floating self-adjusting manual chuck according to claim 1, characterized in that: The disk base (1) is provided with a first slide rail (5), and a first slider cooperating with the first slide rail (5) is provided at the bottom of the claw (201).

10. The floating self-adjusting manual chuck according to claim 2, wherein: The disk base (1) or the disk cover (3) is provided with a second slide rail (6), and a second slider cooperating with the second slide rail (6) is provided on the nut seat (204).

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