Novel rotating table

Abstract

The invention provides a novel rotating table, and belongs to the technical field of machine tool equipment. The positioning device solves the problem that positioning precision is low due to the fact that tooth space errors exist between teeth when an existing workbench is positioned in a mode that upper teeth and lower teeth are meshed. The device comprises a working table, a base and a driving part for driving the working table to lift, the working table comprises a table top and a positioning part fixedly arranged at the bottom of the table top, the transverse section of the positioning part is in a regular polygon shape, a positioning groove is formed in the base, the positioning part is embedded in the positioning groove, the table top abuts against the base, and the driving part drives the working table to lift. The bottom surface of the positioning part extends out of the positioning groove. The positioning device has the advantages that the positioning mode that the positioning parts are in interference fit with the positioning grooves is adopted, and positioning is more accurate.

Description

Technical Field

[0001] The invention belongs to the technical field of machine tool equipment and relates to a novel rotary table. Background Art

[0002] The traditional rotary table is a machine tool accessory with a rotatable tabletop for clamping workpieces and realizing rotation and indexing positioning. The tabletop has a center hole for workpiece positioning and a T-slot for clamping. A worm-worm gear pair is provided between the tabletop and the base for transmission and indexing. The end of the worm extending from the base is equipped with a subdivided dial and a handwheel. Turning the handwheel can drive the tabletop to rotate.

[0003] The Chinese invention patent with patent number CN 218193668 U discloses an automatic exchange workbench drilling and tapping center, including a base, a workbench rotatably arranged on the base, an upper end face tooth is arranged at the bottom of the workbench, and a lower end face tooth meshing with the upper end face tooth is arranged on the base. After the workbench is lifted, the upper end face tooth is separated from the lower end face tooth, and the workbench is driven to rotate a certain angle by a worm-worm gear pair. When the workbench is lowered, the upper end face tooth and the lower end face tooth mesh up and down to form a positioning.

[0004] This workbench is positioned by meshing the upper and lower teeth. Due to the backlash error between the teeth, there is a problem of low positioning accuracy. Summary of the invention

[0005] The purpose of the present invention is to solve the above problems existing in the existing rotary worktable and to provide a worktable which is accurately positioned with the base.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A new type of rotary worktable includes a worktable, a base, and a driving member for driving the worktable to rise and fall. The feature is that the worktable includes a table top and a positioning portion fixed to the bottom of the table top, the transverse cross-section of the positioning portion is a regular polygon, a positioning groove is provided on the base, the positioning portion is embedded in the positioning groove, the table top abuts against the base, and the driving member drives the worktable to rise until the bottom surface of the positioning portion extends out of the positioning groove.

[0008] In the above-mentioned new type of rotary workbench, a vertical guide hole is also opened on the inner bottom surface of the positioning groove, and a vertical guide shaft is fixedly provided at the bottom of the positioning part. The guide shaft is inserted into the guide hole. When the driving member drives the workbench to rise and fall, the guide shaft rises and falls synchronously along the guide hole.

[0009] In the above-mentioned new type of rotary worktable, the positioning groove and the positioning part are interference fit, and a plurality of inclined grooves are opened on the contact profile of at least one piece, and an inclined cantilever is formed between the two inclined grooves; when the two are matched, the cantilever produces elastic deformation to make the positioning groove and the positioning part fit tightly.

[0010] In the above-mentioned novel rotary worktable, the inclined grooves are evenly distributed on the contact contour.

[0011] In the above-mentioned new type of rotary worktable, when the contact contour is set in a square shape, the contact contour includes two pairs of corresponding edges arranged oppositely, and the inclination directions of the inclined grooves of the corresponding edges arranged oppositely are mirror-symmetrical; the four corner areas of the contact contour are all cut off to eliminate the plastic deformation zone.

[0012] In the above-mentioned novel rotary table, the inclined groove is processed by wire cutting, laser cutting, water jet cutting and the like.

[0013] In the above-mentioned novel rotary worktable, the angle between the inclined direction of the inclined groove and the normal direction of the contact profile at the inclined groove is 30-60°.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The original positioning method of upper and lower teeth meshing is changed to the positioning method of interference fit between the positioning part and the positioning groove, which makes the positioning more accurate. When in use, the driving part drives the workbench to rise until the bottom surface of the positioning part extends out of the positioning groove, and the workbench is driven to rotate a certain angle by electric or manual means, and the driving part drives the workbench to descend, so that the positioning part is embedded in the positioning groove to achieve accurate positioning;

[0016] 2. By opening an oblique groove on the contact profile of the locating hole or the locating key, when the locating key and the locating hole are in interference fit, the cantilever can provide elastic deformation to replace the plastic deformation, thereby improving the positioning accuracy and reducing the processing accuracy of the locating key and the locating hole, thereby improving work efficiency and simplifying the workflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the workbench of the present invention after it is lowered;

[0018] Figure 2 is a schematic diagram of a workbench of the present invention after being lifted;

[0019] Figure 3 It is a schematic diagram of the positioning groove of the present invention.

[0020] In the figure, 1, workbench; 2, base; 3, table top; 4, positioning part; 5, positioning groove; 6, guide hole; 7, guide shaft; 8, inclined groove; 9, cantilever. DETAILED DESCRIPTION

[0021] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0022] like Figure 1 and Figure 2 As shown, a new type of rotary table described in the present invention comprises a table 1, a base 2, and a driving member for driving the table 1 to rise and fall. The table 1 comprises a table top 3 and a positioning portion 4 fixedly arranged at the bottom of the table top 3. The transverse cross-sectional shape of the positioning portion 4 is a regular polygon. A positioning groove 5 is provided on the base 2. The positioning portion 4 is embedded in the positioning groove 5. The table top 3 abuts against the base 2. A vertical guide hole 6 is also provided on the inner bottom surface of the positioning groove 5. A vertical guide shaft 7 is fixedly arranged at the bottom of the positioning portion 4. The guide shaft 7 is inserted into the guide hole 6. When the driving member drives the table 1 to rise and fall, the guide shaft 7 rises and falls synchronously along the guide hole 6.

[0023] When in use, the driving member drives the workbench 1 to rise until the bottom surface of the positioning portion 4 extends out of the positioning groove 5, and drives the workbench 1 to rotate a certain angle by electric or manual means. The driving member drives the workbench 1 to descend, so that the positioning portion 4 is embedded in the positioning groove 5 to achieve precise positioning.

[0024] The positioning groove 5 and the positioning part 4 are interference fit, and at least one of the contact profiles is provided with a plurality of inclined grooves 8, and an inclined cantilever 9 is formed between the two inclined grooves 8; when the two are matched, the cantilever 9 produces elastic deformation to make the positioning groove 5 and the positioning part 4 fit tightly. The inclined grooves 8 are evenly distributed on the contact profile. The inclined grooves 8 are processed by wire cutting, laser cutting, water jet cutting, etc. The angle between the inclined direction of the inclined groove 8 and the normal direction of the contact profile at the inclined groove 8 is 30-60°.

[0025] When the cross-sectional shape of the positioning groove 5 and the positioning portion 4 described in the present invention is a square, the workbench 1 can be rotated 90° and multiples of 90°. When the cross-sectional shape is a regular hexagon, the workbench 1 can be rotated 60° and multiples of 60°. By analogy, the cross-sectional shape of the positioning groove 5 and the positioning portion 4 can be freely changed according to different usage environments.

[0026] like Figure 3 As shown, when the contact profile is arranged in a square shape, the contact profile includes two pairs of corresponding edges arranged oppositely, and the inclination directions of the inclined grooves 8 of the corresponding edges arranged oppositely are mirror-symmetrical; the four corner areas of the contact profile are all cut off to eliminate the plastic deformation zone.

[0027] It should be understood that in the claims and description of the present invention, all "including..." should be understood as an open-ended meaning, that is, its meaning is equivalent to "at least contains...", and should not be understood as a closed meaning, that is, its meaning should not be understood as "only includes...".

[0028] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A novel rotary table, comprising a table (1), a base (2), and a driving member for driving the table (1) to move up and down, characterized in that: The workbench (1) comprises a tabletop (3) and a positioning portion (4) fixedly arranged at the bottom of the tabletop (3); the transverse cross-section of the positioning portion (4) is a regular polygon; a positioning groove (5) is provided on the base (2); the positioning portion (4) is embedded in the positioning groove (5); the tabletop (3) abuts against the base (2); the driving member drives the workbench (1) to rise until the bottom surface of the positioning portion (4) extends out of the positioning groove (5); the positioning groove (5) and the positioning portion (4) are interference-fitted; and a plurality of inclined grooves (8) are provided on the contact profile of at least one of the plurality of inclined grooves (8); an inclined cantilever (9) is formed between the inclined grooves (8); when the two are fitted, the cantilever (9) generates elastic deformation so that the positioning groove (5) and the positioning portion (4) are closely fitted.

2. A new rotary table according to claim 1, characterized in that: A vertical guide hole (6) is also formed on the inner bottom surface of the positioning groove (5), and a vertical guide shaft (7) is fixedly provided at the bottom of the positioning portion (4). The guide shaft (7) is inserted into the guide hole (6). When the driving member drives the workbench (1) to rise or fall, the guide shaft (7) rises or falls synchronously along the guide hole (6).

3. A new type of rotary table according to claim 1, characterized in that: The inclined grooves (8) are evenly distributed on the contact profile.

4. A new type of rotary table according to claim 1, characterized in that: When the contact profile is arranged in a square shape, the contact profile comprises two pairs of corresponding edges arranged opposite to each other, and the inclination directions of the inclined grooves (8) of the corresponding edges arranged opposite to each other are mirror-symmetrical; the four corner areas of the contact profile are all cut off to eliminate the plastic deformation area.

5. The novel rotary table according to claim 1 is characterized in that: The angle between the inclined direction of the inclined groove (8) and the normal direction of the contact profile at the inclined groove (8) is 30-60°.

Images