CN211135800U - Hobbing clamp - Google Patents

Abstract

The utility model discloses a gear hobbing fixture, which comprises a base, a mandrel, a sleeve, a rubber sleeve, a pressing sleeve, a nut and a cover plate. The top surface is the reference surface of the side of the positioning gear; the mandrel is set in the base, and the top of the mandrel extends to the top of the base; the sleeve is sleeved on the mandrel, and the sleeve is located above the base; the rubber sleeve Set outside the sleeve, and the rubber sleeve is located at the upper end of the base; the pressure sleeve is sleeved on the mandrel, and the pressure sleeve is located at the upper end of the sleeve. The nut is screwed on the threaded shaft located on the upper part of the mandrel, and the nut connects the sleeve, The pressing sleeve is defined between the base and the nut; the cover plate is arranged on the upper end of the base, and the cover plate defines the rubber sleeve between the base and the cover plate. When the nut of the utility model compresses the pressing sleeve and the sleeve, the rubber sleeve is urged to expand around, the gear is positioned, the reliable clamping of the gear can be realized, and the machining accuracy of the gear is improved.

Description

A gear hobbing fixture

technical field

The utility model relates to the technical field of machining process equipment, in particular to a gear hobbing fixture.

Background technique

When the gear hobbing method is used for finishing gears, it is necessary to use a clamping device to position the gear to be processed on the worktable, and then roll the gear to the desired tooth shape. The existing clamping device is used in the actual processing process. , After a long time of processing, the centering parts will be deformed and worn, resulting in poor machining accuracy of the gears.

Utility model content

In view of the above problems, the utility model provides a gear hobbing fixture capable of improving the machining accuracy of gears.

The technical scheme adopted by the present utility model to solve the above problems is:

A gear hobbing fixture, comprising:

a base, the bottom surface of the base is the reference surface installed on the machine tool worktable, and the top surface of the base is the reference surface of the side surface of the positioning gear;

a mandrel, the mandrel is arranged in the base, and the top end of the mandrel extends above the base;

a sleeve, the sleeve is sleeved on the mandrel, and the sleeve is located above the base;

a rubber sleeve, the rubber sleeve is sleeved outside the sleeve, and the rubber sleeve is located at the upper end of the base;

a compression sleeve, the compression sleeve is sleeved on the mandrel, and the compression sleeve is located at the upper end of the sleeve;

a nut, the nut is screwed on the threaded shaft located on the upper part of the mandrel, and the nut confines the sleeve and the pressing sleeve between the base and the nut;

A cover plate is provided on the upper end of the base, and the cover plate defines the rubber sleeve between the base and the cover plate.

Preferably, the rubber sleeve is provided with a first straight hole, a tapered hole and a second straight hole which are communicated in sequence, the large end of the tapered hole is communicated with the first straight hole, and the small hole of the tapered hole is in communication with the first straight hole. The end communicates with the second straight hole, the first straight hole and the tapered hole form an installation hole, and the sleeve is located in the installation hole.

Preferably, a plurality of U-shaped grooves are formed on the side wall of the mounting hole.

Preferably, the base comprises a bottom plate, a circular truncated column, a connecting column and a top plate that are connected in sequence, the large end of the circular truncated column is connected with the bottom plate, and the small end of the circular truncated column is connected with the connecting column, so the A stepped hole is opened in the base, the connecting plate located at the lower end of the mandrel is fixed on the stepped surface of the stepped hole, and the mounting shaft located at the upper end of the connecting plate extends through the small hole of the stepped hole to the bottom of the stepped hole. above the top plate.

Preferably, the cover plate comprises a first annular plate, a cone and a second annular plate connected in sequence, the first annular plate is connected to the top plate, and the large end of the cone is connected to the first annular plate. The inner circumference of the plate is connected, the small end of the cone is connected with the outer circumference of the second annular plate, and the pressing sleeve penetrates the inner hole of the second annular plate.

Preferably, several U-shaped grooves are evenly distributed on the side wall of the mounting hole.

Preferably, 3 to 6 U-shaped grooves are formed on the mounting hole.

Preferably, six U-shaped grooves are formed on the mounting hole.

The advantages of the utility model are: the pressing sleeve of the present utility model seals the rubber sleeve in the space formed by the sleeve, the cover plate and the upper plane of the top plate. Expansion, fixing the gear, and then hobbing the gear. Obviously, the rubber sleeve as an elastic pressure member is not easy to wear. Even if it wears, the expansion force applied to the gear after deformation can still realize Reliable clamping, thus improving the machining accuracy of gears.

In addition to the objects, features and advantages described above, the present invention has other objects, features and advantages. The present utility model will be described in further detail below with reference to the drawings.

Description of drawings

The accompanying drawings, which constitute a part of this specification and are used for further understanding of the present invention, illustrate preferred embodiments of the present invention, and together with the description, serve to explain the principles of the present invention. In the attached image:

Fig. 1 is the sectional view of the present utility model;

Fig. 2 is the structural representation of the rubber sleeve of the present utility model; And

3 is a top view of the rubber sleeve of the present invention.

Among them, the figure is marked as:

Base-10, Bottom-plate-11, Round Column-12, Connecting Post-13, Top Plate-14, Step Hole-15, Mandrel-20, Threaded Shaft-21, Connecting Plate-22, Mounting Shaft-23, Sleeve -30, rubber sleeve-40, first straight hole-41, tapered hole-42, second straight hole-43, mounting hole-44, U-shaped groove-441, pressing sleeve-50, nut-60, cover plate- 70. First annular plate-71, cone-72, second annular plate-73.

Detailed ways

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways defined and covered by the claims.

Referring to FIGS. 1 to 3 , a gear hobbing fixture as shown in FIG. 1 includes a base 10 , a mandrel 20 , a sleeve 30 , a rubber sleeve 40 , a pressing sleeve 50 , a nut 60 and a cover plate 70 . The seat 10 includes a bottom plate 11 , a truncated column 12 , a connecting column 13 and a top plate 14 which are connected in sequence. The base 10 is provided with a stepped hole 15, the bottom surface of the bottom plate 11 is the reference surface installed on the machine tool table, and the top surface of the top plate 14 is the reference surface of the side surface of the positioning gear.

In this embodiment, the diameter of the bottom plate 11 is greater than the diameter of the large end of the truncated column 12 , the diameter of the top plate 14 is greater than the diameter of the connecting column 13 , and the diameter of the top plate 14 is smaller than the diameter of the bottom plate 11 diameter of.

As shown in FIG. 1 , the mandrel 20 includes a connecting plate 22 , a mounting shaft 23 and a threaded shaft 21 that are connected in sequence from bottom to top. The connecting plate 22 is fixed on the stepped surface of the stepped hole 15 . The shaft 23 extends through the small hole 151 of the stepped hole 15 to the top of the top plate 14 .

The sleeve 30 is sleeved on the installation shaft 23 , and the sleeve 30 is located above the top plate 14 , the rubber sleeve 40 is sleeved outside the sleeve 30 , and the rubber sleeve 40 is Located at the upper end of the top plate 14, the pressure sleeve 50 is sleeved on the installation shaft 23, the pressure sleeve 50 is located at the upper end of the sleeve 30, and the upper part of the pressure sleeve 50 is located on the threaded shaft 21 , the nut 60 is screwed on the threaded shaft 21 , and the nut 60 confines the sleeve 30 and the pressing sleeve 50 between the top plate 14 and the nut 60 .

As shown in FIG. 1 , the cover plate 70 includes a first annular plate 71 , a cone 72 and a second annular plate 73 connected in sequence, the first annular plate 71 is connected to the top plate 14 , and the cone 72 The big end is connected to the inner circumference of the first annular plate 71 , the small end of the cone 72 is connected to the outer circumference of the second annular plate 73 , and the pressing sleeve 50 penetrates the second annular plate 73 . The second annular plate 73 defines the rubber sleeve 40 between the base 10 and the cover plate 70 .

As shown in FIG. 1 , FIG. 2 and FIG. 3 , the rubber sleeve 40 is provided with a first straight hole 41 , a tapered hole 42 and a second straight hole 43 which are communicated in sequence, and the large end of the tapered hole 42 is connected to the The first straight hole 41 is communicated with, the small end of the tapered hole 42 is communicated with the second straight hole 43, and the first straight hole 41 and the tapered hole 42 form a mounting hole 44, the sleeve 30 is located in the installation hole 44, and a plurality of U-shaped grooves 441 are opened on the side wall of the installation hole 44.

In this embodiment, the rubber cover 40 is made of polyurethane rubber.

In this embodiment, several U-shaped grooves 441 are evenly distributed on the side wall of the mounting hole 44 .

Preferably, three to six U-shaped grooves 441 are formed on the mounting hole 44 .

In this embodiment, the mounting holes 44 are provided with six U-shaped grooves 441, so that the outer diameter of the rubber sleeve 40 has a large deformation space, which can adapt to the workpiece with a large inner diameter of the gear, and expand the rolling Scope of application of tooth clamps.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims (8)

1. a gear hobbing fixture, is characterized in that, comprises: A base (10), the bottom surface of the base (10) is a reference surface installed on a machine tool workbench, and the top surface of the base (10) is a reference surface for positioning the side surface of the gear; a mandrel (20), the mandrel (20) is arranged in the base (10), and the top end of the mandrel (20) extends above the base (10); a sleeve (30), the sleeve (30) is sleeved on the mandrel (20), and the sleeve (30) is located above the base (10); a rubber sleeve (40), the rubber sleeve (40) is sleeved outside the sleeve (30), and the rubber sleeve (40) is located at the upper end of the base (10); a pressing sleeve (50), the pressing sleeve (50) is sleeved on the mandrel (20), and the pressing sleeve (50) is located at the upper end of the sleeve (30); A nut (60), the nut (60) is screwed on the threaded shaft (21) located on the upper part of the mandrel (20), and the nut (60) connects the sleeve (30), the press sleeve ( 50) is defined between the base (10) and the nut (60); A cover plate (70), the cover plate (70) is provided on the upper end of the base (10), and the cover plate (70) confines the rubber sleeve (40) on the base (10) ) and the cover plate (70). 2 . The gear hobbing jig according to claim 1 , wherein the rubber sleeve ( 40 ) is provided with a first straight hole ( 41 ), a tapered hole ( 42 ) and a second straight hole ( 43 ) that are communicated in sequence. 3 . ), the large end of the tapered hole (42) is communicated with the first straight hole (41), the small end of the tapered hole (42) is communicated with the second straight hole (43), and the The first straight hole (41) and the tapered hole (42) form an installation hole (44), and the sleeve (30) is located in the installation hole (44). 3 . The gear hobbing jig according to claim 2 , wherein a plurality of U-shaped grooves ( 441 ) are formed on the side wall of the mounting hole ( 44 ). 4 . 4. The gear hobbing fixture according to claim 3, characterized in that, the base (10) comprises a bottom plate (11), a circular truncated column (12), a connecting column (13) and a top plate (14) connected in sequence, The big end of the pedestal column (12) is connected with the bottom plate (11), the small end of the pedestal column (12) is connected with the connecting column (13), and the base (10) is provided with a step A hole (15), the connecting plate (22) at the lower end of the mandrel (20) is fixed on the stepped surface of the stepped hole (15), and the mounting shaft (23) at the upper end of the connecting plate (22) passes through the hole (15). The small hole (151) passing through the stepped hole (15) extends to the top of the top plate (14). 5. The gear hobbing jig according to claim 4, wherein the cover plate (70) comprises a first annular plate (71), a cone (72) and a second annular plate (73) which are connected in sequence, The first annular plate (71) is connected to the top plate (14), the large end of the cone (72) is connected to the inner circumference of the first annular plate (71), and the cone (72) The small end of the second annular plate (73) is connected to the outer circumference of the second annular plate (73), and the pressing sleeve (50) penetrates through the inner hole of the second annular plate (73). 6 . The gear hobbing jig according to claim 3 , wherein a plurality of U-shaped grooves ( 441 ) are evenly distributed on the side wall of the mounting hole ( 44 ). 7 . 7 . The gear hobbing jig according to claim 6 , wherein 3 to 6 U-shaped grooves ( 441 ) are formed on the mounting hole ( 44 ). 8 . 8 . The gear hobbing jig according to claim 7 , wherein six U-shaped grooves ( 441 ) are formed on the mounting hole ( 44 ). 9 .

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