Hobbing clamp capable of being rapidly switched

Abstract

The utility model discloses a gear hobbing clamp capable of being rapidly switched, which belongs to the technical field of clamps and comprises a base, a core shaft is inserted into the base, two limiting openings are formed in the core shaft, a positioning component is detachably connected to the top end of the base and located in the two limiting openings, a cushion block is slidably inserted into the core shaft, and the cushion block is located in the limiting openings. The top end of the mandrel is in threaded connection with a nut which is located on the upper side of the cushion block. The mandrel is inserted into the base, the positioning assembly limits the mandrel through the two limiting openings, the cushion block and the nut are matched to clamp and fix a workpiece on the mandrel, a machine tool workbench drives the mandrel to rotate when controlling the base to rotate, the mandrel drives the clamped workpiece to rotate, and the good function of driving the hobbing clamp to rotate is achieved. And when the device is suitable for workpieces with different inner diameters, the mandrel is replaced, correction is not needed, and the remodeling time is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of clamps, and more particularly to a gear hobbing clamp capable of rapid switching. Background Art

[0002] Gear hobbing fixtures are important components in gear hobbing. They directly fix the workpiece being processed. They are usually installed on the workbench of the machine tool and work with the machine tool to process the workpiece. Different fixtures can be replaced to suit different products. However, most existing gear hobbing fixtures still have the following problems:

[0003] 1. When applying to products with different inner holes, it is necessary to replace the gear hobbing fixtures of different specifications, which takes a long time to change and correct;

[0004] 2. The positioning end face in the gear hobbing fixture is fixed and unchanged. It is only suitable for processing products with a root circle larger than the positioning end face. The range of products that can be processed is limited. During gear hobbing, there is a risk of collision between the tool and the gear hobbing fixture.

[0005] 3. The gear hobbing fixture has a large difference between the maximum and minimum outer diameters, resulting in a top-heavy structure. The center of gravity of the fixture body is offset from the center, which is not conducive to processing and manufacturing of the fixture body.

[0006] 4. There is a small gap when the workpiece is clamped in the gear hobbing fixture, which is prone to wear. After a certain number of uses, the gap increases, affecting the positioning accuracy and causing the entire gear hobbing fixture to be scrapped. Utility Model Content

[0007] 1. Technical problems to be solved

[0008] In response to the problems existing in the prior art, the purpose of the present utility model is to provide a quickly switchable gear hobbing fixture, aiming to solve the problem that the gear hobbing fixture in the prior art has a large difference between the maximum outer diameter and the minimum outer diameter of the entire body, which is a top-heavy structure, and the center of gravity of the fixture body is offset from the center. When processing and manufacturing the fixture body, it is not conducive to processing and manufacturing. When applying different inner hole products, different specifications of gear hobbing fixtures need to be replaced, and the changeover and correction time is long. The positioning end face in the gear hobbing fixture is fixed and unchanged, and it is only applicable to the processing of products whose product root circle is larger than the positioning end face. The range of processed products is limited. During gear hobbing, there is a risk of collision between the tool and the gear hobbing fixture. There is a small gap when the workpiece is clamped in the gear hobbing fixture, which is prone to wear. After a certain number of uses, the gap increases, affecting the positioning accuracy and causing the entire gear hobbing fixture to be scrapped.

[0009] 2. Technical solution

[0010] In order to solve the above problems, the present invention adopts the following technical solutions:

[0011] A quickly switchable gear hobbing fixture includes a base, a core shaft is inserted into the base, two limit openings are provided on the core shaft, a positioning component is detachably connected to the top end of the base, and the positioning component is located in the two limit openings, a pad is slidably inserted on the core shaft, a nut is threadedly connected to the top end of the core shaft, and the nut is located on the upper side of the pad.

[0012] As a preferred solution of the present invention, the core shaft includes a connecting section, a positioning section and a clamping section, the connecting section is slidably connected to the base, the positioning section and the clamping section are both fixedly connected to the top of the connecting section, and the positioning section is fixedly connected to the circumferential surface of the clamping section at the top of the base, the two limiting openings are both opened on the positioning section and correspond to the top of the base, the pad is slidably connected to the circumferential surface of the clamping section at the top of the positioning section, and the nut is threadedly connected to the top of the clamping section.

[0013] As a preferred solution of the present invention, the positioning assembly includes two positioning blocks and two hexagonal bolts, the two positioning blocks are arranged at the top of the base, and the two positioning blocks are respectively located in the two limiting openings, the two hexagonal bolts are respectively threadedly connected between the two positioning blocks and the base, and the two hexagonal bolts are respectively located in the two limiting openings.

[0014] As a preferred solution of the present invention, a plurality of mounting holes are provided on the base, and the plurality of mounting holes are evenly distributed around the central axis of the base.

[0015] 3. Beneficial effects

[0016] Compared with the prior art, the advantages of the present invention are:

[0017] (1) In this solution, the core shaft is inserted into the base, the positioning assembly limits the core shaft through two limit ports, the pad and nut cooperate to clamp the workpiece on the core shaft, and the machine tool worktable controls the base to rotate to drive the core shaft to rotate, and the core shaft drives the clamped workpiece to rotate, achieving a good function of driving the gear hobbing fixture to rotate. When using workpieces with different inner diameters, the core shaft can be replaced without correction, shortening the changeover time.

[0018] (2) In this solution, the spacer is fitted with the clamping section through the inner hole, the top of the spacer is fitted with the bottom of the workpiece, and the bottom of the spacer is fitted with the top of the positioning section, thereby axially limiting the freedom of the workpiece. The spacer allows the positioning assembly to have sufficient height space, so that a complete tooth shape can be machined and the head can be produced during gear hobbing, and the tool and the gear hobbing fixture are less likely to collide.

[0019] (3) In this solution, the core shaft consists of a plug-in section, a positioning section and a clamping section. The plug-in section and the base are connected by a taper fit to achieve a detachable function. The overall center of gravity of each component tends to its own center, which is convenient for processing and manufacturing when manufacturing the fixture, and the manufacturing cost is greatly reduced. When the workpiece is assembled and used multiple times, resulting in a decrease in the accuracy of the fixture, only the core shaft needs to be replaced, and the replacement cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is the main view of the utility model;

[0021] Figure 2 It is a cross-sectional view of the utility model;

[0022] Figure 3 This is an exploded view of the present invention.

[0023] Description of the numbers in the figure:

[0024] 1. Base; 2. Mandrel; 21. Connecting section; 22. Positioning section; 23. Clamping section; 3. Limit opening; 4. Positioning assembly; 41. Positioning block; 42. Hexagonal bolt; 5. Spacer; 6. Nut; 7. Mounting hole. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts are within the scope of protection of the present invention.

[0026] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "mounted / connected," and "connected" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to the specific circumstances.

[0028] Example:

[0029] See also Figure 1-3 A quickly switchable gear hobbing fixture includes a base 1, a core shaft 2 is inserted in the base 1, two limit openings 3 are provided on the core shaft 2, a positioning component 4 is detachably connected to the top of the base 1, and the positioning component 4 is located in the two limit openings 3, a pad 5 is slidably inserted on the core shaft 2, a nut 6 is threadedly connected to the top of the core shaft 2, and the nut 6 is located on the upper side of the pad 5.

[0030] In this embodiment, the base 1 is installed on the machine tool workbench, and by correcting its outer circle for alignment, the core shaft 2 is inserted into the base 1 and positioned through two limit openings 3 and the positioning assembly 4. The pad 5 is slidably inserted into the core shaft 2, and the workpiece is inserted into the core shaft 2. The top of the pad 5 contacts the bottom end of the workpiece, and then is threadedly connected to the core shaft 2 through the nut 6. The bottom end of the nut 6 has good form and position tolerances after grinding, and can stably press the workpiece, so that the machine tool drives the base 1 to rotate to perform gear hobbing processing on the workpiece; among them, the pad 5 can select different specifications according to different workpiece types.

[0031] Specifically, the core shaft 2 includes a connecting section 21, a positioning section 22 and a clamping section 23. The connecting section 21 is slidably inserted into the base 1. The positioning section 22 and the clamping section 23 are both fixedly connected to the top of the connecting section 21, and the positioning section 22 is fixedly connected to the circumferential surface of the clamping section 23 at the top of the base 1. The two limit openings 3 are both opened on the positioning section 22 and correspond to the top of the base 1. The pad 5 is slidably inserted into the circumferential surface of the clamping section 23 at the top of the positioning section 22, and the nut 6 is threadedly connected to the top of the clamping section 23.

[0032] In this embodiment, the plug-in section 21 is designed with a Morse taper, and a taper is provided inside the base 1. The plug-in section 21 and the base 1 are connected through the taper to realize the detachable function. Each component realizes that the overall center of gravity tends to its own center. The positioning section 22 is located in the middle of the core shaft 2, and is positioned by cooperating with the positioning component 4 through the two limit openings 3 opened. The pad 5 and the nut 6 are set on the clamping section 23 to clamp the workpiece to fix the workpiece.

[0033] Specifically, the positioning assembly 4 includes two positioning blocks 41 and two hexagonal bolts 42. The two positioning blocks 41 are both arranged at the top of the base 1, and the two positioning blocks 41 are respectively located in the two limiting openings 3. The two hexagonal bolts 42 are respectively threadedly connected between the two positioning blocks 41 and the base 1, and the two hexagonal bolts 42 are respectively located in the two limiting openings 3.

[0034] In this embodiment, the two positioning blocks 41 are fixed to the base 1 by two hexagonal bolts 42 , and cooperate with the two limiting openings 3 to position the core shaft 2 , thereby achieving a good fixture rotation function.

[0035] Specifically, a plurality of mounting holes 7 are formed on the base 1 , and the plurality of mounting holes 7 are evenly distributed around the central axis of the base 1 .

[0036] In this embodiment, the plurality of mounting holes 7 are used in conjunction with bolts so that the base 1 can be stably mounted on the machine tool workbench.

[0037] Working principle: The base 1 is installed on the workbench of the machine tool. By correcting its outer circle for alignment, the connecting section 21 is inserted into the base 1 so that the positioning section 22 is located at the top of the base 1. The two positioning blocks 41 are respectively placed in the two limit openings 3 and contact with the top of the base 1. The two positioning blocks 41 are fixed on the base 1 by two hexagonal bolts 42, thereby realizing the positioning of the core shaft 2. Then the pad 5 is slidably inserted into the clamping section 23, and the workpiece is inserted into the clamping section 23 and contacts with the top of the pad 5. The nut 6 is threadedly connected to the top of the clamping section 23 to press the workpiece, so that the machine tool drives the base 1 to rotate to perform gear hobbing processing on the workpiece.

[0038] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and improved ideas of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A quick-switch gear hobbing fixture, comprising a base (1), characterized in that: A core shaft (2) is inserted into the base (1), and two limiting openings (3) are provided on the core shaft (2). A positioning component (4) is detachably connected to the top end of the base (1), and the positioning component (4) is located in the two limiting openings (3). A cushion block (5) is slidably inserted into the core shaft (2), and a nut (6) is threadedly connected to the top end of the core shaft (2), and the nut (6) is located on the upper side of the cushion block (5).

2. The fast-switch gear hobbing fixture according to claim 1, characterized in that: The core shaft (2) includes a plug-in section (21), a positioning section (22) and a clamping section (23), the plug-in section (21) is slidably plugged into the base (1), the positioning section (22) and the clamping section (23) are both fixedly connected to the top of the plug-in section (21), and the positioning section (22) is fixedly connected to the circumferential surface of the clamping section (23) and is located at the top of the base (1), the two limit openings (3) are both excavated on the positioning section (22) and correspond to the top of the base (1), the pad (5) is slidably plugged into the circumferential surface of the clamping section (23) and is located at the top of the positioning section (22), and the nut (6) is threadedly connected to the top of the clamping section (23).

3. The fast-switch gear hobbing fixture according to claim 2, characterized in that: The positioning assembly (4) comprises two positioning blocks (41) and two hexagonal bolts (42), the two positioning blocks (41) are both arranged at the top of the base (1), and the two positioning blocks (41) are respectively located in the two limiting openings (3), the two hexagonal bolts (42) are respectively threadedly connected between the two positioning blocks (41) and the base (1), and the two hexagonal bolts (42) are respectively located in the two limiting openings (3).

4. The fast-switch gear hobbing fixture according to claim 3, characterized in that: The base (1) is provided with a plurality of mounting holes (7), and the plurality of mounting holes (7) are evenly distributed around the central axis of the base (1).

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