CN220901923U - Four-jaw chuck - Google Patents

Abstract

The utility model relates to a bearing product turning auxiliary device, in particular to a four-jaw chuck, which comprises: the clamping chuck comprises a chuck body, four identical clamping jaws and supporting columns arranged at intervals with the four clamping jaws; the four clamping claws are uniformly arranged along the circumferential direction of the chuck and are respectively and movably connected with the chuck; the support columns which are arranged at intervals with the four clamping claws are respectively connected with the chuck in a sliding way; by additionally arranging the supporting columns with adjustable heights, the end face height positioning of the supporting columns is adjusted at any time according to different workpiece specifications, so that the contact between a lathe tool bit and a claw during processing is prevented, the claw is prevented from being damaged, and the cutting of a ferrule can be safely completed; time and trouble are saved, and the machining efficiency of the whole cutting is improved.

Description

Four-jaw chuck

Technical Field

The utility model relates to auxiliary equipment for turning of bearing products, in particular to a four-jaw chuck, and belongs to the technical field of bearing machining.

Background

In the process of turning the plane of the bearing ring, a mode is generally adopted in which a workpiece is horizontally placed on a claw arranged on a chuck, and a lathe tool bit extends into the inner wall of the ring to cut an inner diameter surface. The clamping jaw of the chuck is usually in a four-jaw form, and the structure of the clamping jaw is in a stepped table shape, so that an end face supporting table surface and an outer diameter side elevation matched with the ferrule are formed; during processing, the lower end face of the ferrule is matched with the upper surface of the end face supporting table surface of the clamping jaw, and the outer diameter face of the ferrule is attached to the outer diameter side elevation of the clamping jaw to realize supporting and clamping.

After the installation of the ferrule on the clamping jaw is completed, the ferrule is positioned on the upper end face of the end face supporting table of the clamping jaw, and the end face supporting table of the clamping jaw extends towards the inner diameter direction of the ferrule and is provided with an extension part with a certain length; when the cutter head stretches into the inner diameter of the ferrule to cut the inner diameter surface, the cutter head collides with the end surface supporting table of the claw, and the cutter head and the claw are cut together with the claw to cut the inner diameter surface of the ferrule, so that the claw is damaged;

In order to solve the problem, the position of the ferrule needs to be adjusted so that the clamping jaw does not interfere with the position of the cutter head during cutting; traditionally, this has been done by placing a spacer of a predetermined height on the chuck. The operation of the mode needs to use a lifting device to lift the ferrule on the end face supporting table surface of the claw, and the ferrule is clamped by the claw after the height is adjusted by the cushion block; the height of the cushion block with the preset height is not flexibly adjustable, and a plurality of different cushion blocks need to be replaced; time-consuming, inconvenient to operate, and reduces adjustment efficiency.

Disclosure of utility model

In view of the technical problems, the utility model aims to provide a four-jaw chuck, which is characterized in that the height of the end face of the chuck is adjusted at any time according to different workpiece specifications by additionally arranging a supporting column with adjustable height, so that the contact between a turning tool bit and a jaw during machining is prevented, the jaw is prevented from being damaged, and the cutting of a ferrule can be safely completed; time and trouble are saved, and the machining efficiency of the whole cutting is improved.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: a four-jaw chuck, comprising: the clamping chuck comprises a chuck body, four identical clamping jaws and supporting columns arranged at intervals with the four clamping jaws; the four clamping claws are uniformly arranged along the circumferential direction of the chuck and are respectively and movably connected with the chuck; the support columns which are arranged at intervals with the four clamping claws are respectively connected with the chuck in a sliding way;

The movable connection of the clamping jaw and the chuck, and the sliding connection of the supporting column and the chuck can realize the random position adjustment of the clamping jaw and the supporting column in the direction from the outer diameter to the center of the chuck, so as to adapt to products with different specifications.

Further, the included angle between every two adjacent claws is 90 degrees, and the included angle between every two adjacent support columns is 90 degrees; namely, the positions of the clamping jaw and the supporting column on the chuck are the positions of the eight equal parts of the chuck;

Further, each jaw is connected with the chuck in the form of a ball screw; the clamping jaw is of a ladder-shaped structure formed by an integrally formed horizontal supporting table and a vertical clamping part, and two sides of the clamping jaw are respectively provided with a fixed block and are fastened on the chuck through bolts; when the workpiece is installed, the outer wall of the workpiece is attached to the vertical inner surface of the clamping part;

further, the lower surface of the claw horizontal supporting table is fixedly connected to a nut in the ball screw assembly, the nut is sleeved on the screw rod, and the screw rod and the nut are embedded in the chuck; the screw rod rotates to enable the nut to move relative to the screw rod, so that the claw on the nut is driven to synchronously move;

Further, each support column is connected in the chuck in a sliding manner through a sliding block; the support column is of a cylindrical structure, the lower end of the support column is connected with a T-shaped sliding block, a sliding groove matched with the T-shaped sliding block is formed in the position, corresponding to the support column, of the upper surface of the chuck, and the support column can realize adjustment of any position through sliding of the sliding block in the sliding groove; the upper end face of the support column is provided with a threaded blind hole, and a nut with external threads is arranged in the threaded blind hole in a matching manner;

further, the upper part of the nut is a hexagonal area section, and the lower part of the nut is an external thread area section; the threaded region section of the nut can be randomly adjusted up and down in the threaded blind hole of the support column, so that the height of the end face of the nut is adjusted;

Further, the hexagonal body area section and the external thread area section of the nut are connected in an integral type;

Further, the outer diameter of the hexagonal region section of the nut is much smaller than the diameter of the support column; the two areas with the size difference are used for accommodating the tool bit of the turning tool, enough space is reserved for the tool bit, and the tool bit is prevented from touching the nut in the cutting process.

When the bearing ring is assembled with the four-jaw chuck with the structure, after the positions of the support columns are adjusted according to the diameters of the bearing ring, the bearing ring is placed on the nuts of the support columns, so that the lower end face of the bearing ring is in direct contact with the upper end face of the nuts of the support columns;

The height of each support column is adjusted before the bearing ring is placed, the lower edge of the nut hexagonal area section of each support column is higher than the upper end face of the claw horizontal support table, and the upper edge of the nut hexagonal area section of each support column is lower than the height of the upper end face of the claw vertical clamping part; the arrangement drives the bearing ring to rotate when the chuck rotates, and the lathe tool bit stretches into the inside of the ring to cut the inner diameter surface of the ring, so that the bit and the claw horizontal supporting table cannot interfere, and erroneous cutting of the claw is prevented.

When the overall horizontal height of the bearing ring is inconsistent in the cutting process of the bearing ring, and the position of a certain support column is a low point, a gap exists between the nut and the workpiece; the nuts of the supporting columns at the positions can be heightened by adopting a spanner, so that the nuts are contacted with the workpiece, and the leveling of the whole workpiece is realized.

The chuck of the utility model essentially enables the bearing ring to be erected through the height adjustment of the supporting column, and the lower edge of the hexagonal region section of the nut is higher than the upper end face of the claw horizontal supporting table, so as to prevent the cutter point from touching the upper end face of the claw horizontal supporting table during cutting; the purpose of enabling the upper edge of the hexagonal region section of the nut to be lower than the height of the upper end face of the vertical clamping part of the claw is to ensure that the vertical clamping part of the claw clamps the outer wall of the bearing ring.

The surface of the vertical clamping part of the claw, which is contacted with the workpiece, is also provided with a friction gasket, so that the friction force between the clamping surface and the workpiece is increased, and the clamping is facilitated.

The beneficial effects of the utility model are as follows: by additionally arranging the supporting columns with adjustable heights, the end face height positioning of the supporting columns is adjusted at any time according to different workpiece specifications, so that the contact between a lathe tool bit and a claw during processing is prevented, the claw is prevented from being damaged, and the cutting of a ferrule can be safely completed; time and trouble are saved, and the machining efficiency of the whole cutting is improved.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is a schematic diagram of the jaw structure of the chuck.

Fig. 3 is a side view of the jaws.

Fig. 4 is a schematic diagram of a support column structure.

Fig. 5 is a schematic diagram of a nut structure of a support post.

Fig. 6 is a partial cross-sectional view of a support post.

In the figure, 1, chuck, 2, jack catch, 3, support column, 4, horizontal support platform, 5, vertical clamping part, 6, fixed block, 7, bolt, 8, T-shaped slide block, 9, chute, 10, threaded blind hole, 11, nut, 11.1, hexagonal regional section, 11.2, external thread regional section, 12 and friction pad.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

A four jaw chuck as shown in fig. 1-6, comprising: chuck 1, four identical claws 2 and support columns 3 which are arranged at intervals with four claws 2; the four clamping claws 2 are uniformly arranged along the circumferential direction of the chuck 1 and are respectively and movably connected with the chuck 1; the support columns 3 which are arranged at intervals with the four clamping claws 2 are respectively connected with the chuck 1 in a sliding way;

In the embodiment, the included angle between every two adjacent claws 2 is 90 degrees, and the included angle between every two adjacent support columns 3 is 90 degrees; namely, the positions of the clamping jaw 2 and the supporting column 3 on the chuck 1 are the positions of the eight equal parts of the chuck;

Further, each of the jaws 2 is connected to the chuck 1 in the form of a ball screw; the clamping jaw 2 is of a ladder-shaped structure formed by an integrally formed horizontal supporting table 4 and a vertical clamping part 5, and two sides of the clamping jaw 2 are respectively provided with a fixed block 6 and are fastened on the chuck 1 through bolts 7; when the workpiece is installed, the outer wall of the workpiece is attached to the vertical inner surface of the clamping part 5;

Further, the lower surface of the claw horizontal supporting table 4 is fixedly connected to a nut in the ball screw assembly, the nut is sleeved on a screw rod, and the screw rod and the nut are embedded in the chuck 1; the screw rod rotates to enable the nut to move relative to the screw rod, so that the clamping jaw 2 on the nut is driven to synchronously move;

Further, each support column 3 is slidably connected to the chuck 1 through a slide block; the support column 3 is of a cylindrical structure, the lower end of the support column 3 is connected with a T-shaped sliding block 8, a sliding groove 9 matched with the T-shaped sliding block 8 is formed in the position, corresponding to the support column 3, of the upper surface of the chuck 1, and the support column 3 can realize adjustment of any position through sliding of the sliding block 8 in the sliding groove 9; the upper end face of the support column 3 is provided with a threaded blind hole 10, and a nut 11 with external threads is arranged in the threaded blind hole 10 in a matching manner;

Further, the upper part of the nut 11 is a hexagonal area section 11.1, and the lower part is an external thread area section 11.2; the external thread region section 11.2 of the nut can be randomly adjusted up and down in the threaded blind hole 10 of the support column 3, so that the end surface height of the nut 11 is adjusted;

further, the hexagonal area section 11.1 of the nut 11 is excessively connected with the external thread area section 11.2 in an integral manner;

Further, the outer diameter of the hexagonal section 11.1 of the nut 11 is much smaller than the diameter of the support post 3; the two areas with different sizes are used for accommodating the tool bit of the turning tool, enough space is reserved for the tool bit, and the tool bit is prevented from touching the nut 11 in the cutting process.

When the bearing ring is assembled with the four-jaw chuck with the structure, after the positions of the support columns 3 are adjusted according to the diameters of the bearing ring, the bearing ring is placed on the nuts 11 of the support columns 3, so that the lower end face of the bearing ring is in direct contact with the upper end face of the nuts 11 of the support columns;

The height of each support column 3 is adjusted before the bearing ring is placed, the lower edge of the nut hexagonal area section 11.1 of each support column 3 is higher than the upper end face of the claw horizontal support table 4, and the upper edge of the nut hexagonal area section 11.1 of each support column 3 is lower than the height of the upper end face of the claw vertical clamping part 5; when the chuck 1 rotates to drive the bearing ring to rotate, the lathe tool bit stretches into the inside of the ring to cut the inner diameter surface of the ring, so that the bit and the claw horizontal supporting table 4 cannot interfere, and erroneous cutting of the claw 2 is prevented. The surface of the claw vertical clamping part 5, which is in contact with the workpiece, is also provided with a friction gasket 12, so that the friction force between the clamping surface and the workpiece is increased, and the clamping is facilitated.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Claims (9)

1. A four-jaw chuck, comprising: the clamping chuck comprises a chuck body, four identical clamping jaws and supporting columns arranged at intervals with the four clamping jaws; the four clamping claws are uniformly arranged along the circumferential direction of the chuck and are respectively and movably connected with the chuck; support columns which are arranged at intervals with the four clamping claws are respectively connected with the chuck in a sliding way.

2. A four-jaw chuck as set forth in claim 1, wherein: the included angle between every two adjacent claws is 90 degrees, and the included angle between every two adjacent support columns is 90 degrees; the positions of the clamping jaws and the supporting columns on the chuck are the positions of the eight equal parts of the chuck.

3. A four-jaw chuck as set forth in claim 1, wherein: each jaw is connected with the chuck in the form of a ball screw; the clamping jaw is of a ladder-shaped structure formed by an integrally formed horizontal supporting table and a vertical clamping part, and fixing blocks are respectively arranged on two sides of the clamping jaw and are fastened on the chuck through bolts.

4. A four-jaw chuck as set forth in claim 3, wherein: the lower surface of the claw horizontal supporting table is fixedly connected to a nut in the ball screw assembly, the nut is sleeved on the screw rod, and the screw rod and the nut are embedded in the chuck.

5. A four-jaw chuck as set forth in claim 1, wherein: each support column is connected in the chuck in a sliding way through a sliding block; the support column is of a cylindrical structure, the lower end of the support column is connected with a T-shaped sliding block, and a sliding groove matched with the T-shaped sliding block is formed in the position, corresponding to the support column, of the upper surface of the chuck; the upper end face of the support column is provided with a threaded blind hole, and a nut with external threads is matched in the threaded blind hole.

6. A four-jaw chuck as set forth in claim 5, wherein: the upper part of the nut is a hexagonal area section, and the lower part is an external thread area section.

7. A four-jaw chuck as set forth in claim 6, wherein: the hexagonal body area section and the external thread area section of the nut are connected in an integral type.

8. A four-jaw chuck as set forth in claim 5, wherein: the outer diameter of the hexagonal region of the nut is much smaller than the diameter of the support post.

9. A four-jaw chuck as set forth in claim 3, wherein: the surface of the claw vertical clamping part, which is contacted with the workpiece, is also provided with a friction gasket.