Detachable hobbing driving center

Abstract

The utility model discloses a detachable hobbing driving center which comprises a base, a driving support, a first bolt, a driving body, a second bolt, a first mounting hole, a second mounting hole, a third mounting hole, a center body, a spring mounting hole, a limiting ring, a connecting hole, a first gasket, a second gasket, a third bolt, a spring and a limiting strip. The base is connected with the working table of the gear hobbing machine through the bolt, and the base can be selected according to different positions of screw holes of different machine tools so as to adapt to various different machine tools. The tip can be selected according to the sizes of center holes of different workpieces so as to adapt to the different workpieces. The driving body can be selected according to the sizes of the end faces of different workpieces so as to adapt to the different workpieces. And the characteristic of adapting to different parts and different machine tools is achieved. And the structure is simple and easy to machine, and the pure mechanical structure can also be well suitable for old-fashioned gear hobbing machines.

Description

Technical Field

[0001] This utility model relates to the field of machine tool processing fixture technology, and in particular to a detachable gear hobbing drive center. Background Technology

[0002] Currently, shaft-type workpieces in gear hobbing fixtures are generally positioned using a center hole, with the center as the main body of the fixture. However, using only the center for positioning only restricts five degrees of freedom of the workpiece, indicating incomplete positioning and failing to meet the positioning requirements. In this case, a constraint is needed on the workpiece, such as clamping the outer diameter or using end-face drive, to prevent the workpiece from sliding with the spindle rotation during gear hobbing, thus causing product scrap. Currently, most fixtures on the market are either expansion sleeve type outer diameter clamping center positioning fixtures or end-face drive type clamping positioning fixtures. Expansion sleeve type fixtures are typically used in gear hobbing machines with hydraulic clamping, while end-face drive type fixtures are mostly one-piece structures, which are relatively expensive. Furthermore, the end-face size varies for different shaft parts, so there may be situations where different sized end-face drive centers need to be used to meet the processing requirements of different workpieces.

[0003] Because these fixtures are not flexible enough to assemble, slow to replace parts, and cannot be adapted to a wider range of machine tools, improvements must be made to address these shortcomings. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a detachable hobbing drive center, which solves the problems of low output and low working efficiency.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0006] A detachable gear hobbing drive center includes a base, a drive bracket on the base, the upper end face of the base contacting the lower end face of the drive bracket, the drive bracket being detachably connected to the base by a first bolt, a drive body on the drive bracket, the drive body being detachably connected to the drive bracket by a second bolt, a first mounting hole penetrating the base vertically in the middle, a second mounting hole penetrating the drive bracket vertically in the middle, the first mounting hole and the second mounting hole communicating with each other, a third mounting hole penetrating the drive body vertically in the middle, the second mounting hole and the third mounting hole communicating with each other, a center being disposed within the second mounting hole, the upper end of the center extending through the third mounting hole to the top of the drive body, and the lower end of the center extending to the bottom of the drive body. Within the first mounting hole, a spring mounting hole coaxial with the second mounting hole is provided on the lower end face of the drive bracket. The diameter of the spring mounting hole is larger than the diameter of the second mounting hole. A limiting ring is provided in the middle of the center of the spring mounting hole. A connecting hole with a diameter larger than the spring mounting hole is provided at the lower end of the spring mounting hole. A first washer fitted onto the center is provided in the connecting hole. The diameter of the hole at the upper end of the first mounting hole is smaller than the outer diameter of the first washer. A second washer is provided on the lower end face of the center. The second washer is fixed onto the center by a third bolt. The outer diameter of the second washer is larger than the inner diameter of the first washer. A spring is fitted onto the center between the limiting ring and the first washer. The spring is located within the spring mounting hole. Multiple circumferentially arranged limiting strips are evenly provided on the upper end face of the drive bracket.

[0007] Furthermore, the limiting ring and the top are integrally machined.

[0008] Furthermore, the upper surface of the base is provided with a protruding ring that inserts into the connecting hole.

[0009] Furthermore, the limiting strip is a triangular convex strip.

[0010] Furthermore, there are four restrictions.

[0011] Furthermore, the bottom of the base is provided with an installation step, and the installation step is provided with a plurality of base mounting holes.

[0012] Furthermore, the base mounting holes are six in number, evenly distributed.

[0013] Furthermore, the drive bracket is detachably connected to the base via six evenly distributed first bolts.

[0014] Furthermore, the drive body is detachably connected to the drive bracket by four evenly distributed second bolts.

[0015] The beneficial effects of this utility model are:

[0016] Using the above technical solution, the base of this structure is connected to the worktable of the gear hobbing machine by bolts. The base can be selected according to the different bolt hole positions of different machine tools, adapting to various machine tools. The center point can also be selected according to the size of the center hole of different workpieces, adapting to different workpieces. The drive body can also be selected according to the end face size of different workpieces, adapting to different workpieces. This achieves the characteristic of adapting to different parts and different machine tools. Moreover, the structure is simple and easy to manufacture, and the purely mechanical structure is also well-suited for older gear hobbing machines. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of one embodiment of a detachable gear hobbing drive center according to the present invention. Figure 1 ;

[0018] Figure 2 This is a three-dimensional structural diagram of one embodiment of a detachable gear hobbing drive center according to the present invention. Figure 2 ;

[0019] Figure 3 This is a top view schematic diagram of one embodiment of a detachable gear hobbing drive center according to the present invention.

[0020] Figure 4 for Figure 3 A schematic diagram of the AA cross-sectional structure.

[0021] Attachment numbers and their descriptions:

[0022] 1. Base; 2. Drive bracket; 3. Drive body; 4. Second bolt; 5. Center; 6. Restriction bar; 7. First bolt; 8. Mounting step; 9. Base mounting hole; 10. First mounting hole; 11. Third bolt; 12. Second washer; 13. First washer; 14. Spring mounting hole; 15. Limiting ring; 16. Spring; 17. Connecting hole; 18. Protruding ring. Detailed Implementation

[0023] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0024] Reference Figures 1 to 4This utility model provides a detachable gear hobbing drive center, including a base 1, a drive bracket 2 on the base 1, the upper end face of the base 1 contacting the lower end face of the drive bracket 2, the drive bracket 2 being detachably connected to the base 1 by a first bolt 7, a drive body 3 on the drive bracket 2, the drive body 3 being detachably connected to the drive bracket 2 by a second bolt 4, a first mounting hole 10 penetrating vertically through the base 1 in the middle, a second mounting hole penetrating vertically through the drive bracket 2 in the middle, the first mounting hole 10 and the second mounting hole communicating with each other, a third mounting hole penetrating vertically through the drive body 3 in the middle, the second mounting hole and the third mounting hole communicating with each other, a center 5 being provided in the second mounting hole, the upper end of the center 5 extending through the third mounting hole to above the drive body 3, and the lower end of the center 5 extending to the first mounting hole 10. Inside, the lower end face of the drive bracket 2 is provided with a spring mounting hole 14 coaxial with the second mounting hole. The diameter of the spring mounting hole 14 is larger than the diameter of the second mounting hole. The center of the tip 5 inside the spring mounting hole 14 is provided with a limiting ring 15. The lower end of the spring mounting hole 14 is provided with a connecting hole 17 with a diameter larger than the spring mounting hole 14. The connecting hole 17 is provided with a first gasket 13 sleeved on the tip 5. The diameter of the hole at the upper end of the first mounting hole 10 is smaller than the outer diameter of the first gasket 13. The lower end face of the tip 5 is provided with a second gasket 12. The second gasket 12 is fixed on the tip 5 by a third bolt 11. The outer diameter of the second gasket 12 is larger than the inner diameter of the first gasket 13. A spring 16 is sleeved on the tip 5 between the limiting ring 5 and the first gasket 13. The spring 16 is located inside the spring mounting hole 15. The upper end face of the drive bracket 2 is provided with a plurality of circumferentially arranged limiting strips 6. The base 1 has a large conical structure, and the first mounting hole 10 is a hole that is larger at the bottom and smaller at the top, corresponding to the large conical structure. The drive bracket 2 has a small conical structure, and the limiting strip 6 is integrally formed with the drive body 3. The first mounting hole 10, the second mounting hole, the third mounting hole, the spring mounting hole 14, and the connecting hole 17 are on the same axis.

[0025] In this technical solution, the base 1 is bolted to the gear hobbing machine's worktable. The base 1 can be selected according to the different bolt hole positions of various machine tools, adapting to different machine tools. The center 5 can also be selected according to the size of the center hole of different workpieces, adapting to different workpieces. The drive body 3 can also be selected according to the end face size of different workpieces, adapting to different workpieces. This achieves the characteristic of adapting to different parts and different machine tools. Furthermore, the structure is simple and easy to process, and the purely mechanical structure is also well-suited for older gear hobbing machines. Compared to the shortcomings of products on the market, the biggest advantage of this technical solution is its flexible and detachable assembly. It can assemble different drive centers according to the shape characteristics of different workpieces to meet the processing and clamping requirements.

[0026] In this technical solution, the purpose of the drive body 3 is as follows: after the center 5 locks the workpiece, the four equally divided limiting strips 6 on the drive body 3 can restrict the relative rotation between the workpiece and the center 5, so that the workpiece can only rotate with the rotation of the machine tool spindle; the purpose of the center 5 is to select a center 5 of appropriate size and a matching drive body 3 according to different workpiece sizes; the purpose of the first shim 13 and the second shim 12 is to restrict the up and down movement of the center 5; the purpose of the first bolt 7, the second bolt 4 and the third bolt 11 is to provide a fixed connection; the purpose of the base 1 is to connect to the machine tool worktable, and different bases can be selected according to different machine tools, or raised and connected to meet different needs; the purpose of the spring 16 is to compress after the workpiece contacts the center 5, so that the end face of the workpiece contacts the drive body 3; the purpose of the drive bracket 2 is to provide a connection.

[0027] How the whole solution works:

[0028] When the base 1 is installed on the machine tool, the center point 5 presses against the center hole of the product. After locking, the workpiece will squeeze the center point 5, the spring 16 will be compressed, and the center point 5 will move downward, so that the tip of the limiting bar 6 on the drive body 3 contacts the end face of the workpiece, thereby limiting the rotation between the workpiece and the fixture.

[0029] For example, in some embodiments, the limiting ring 15 and the tip 5 are integrally machined. This ensures stability during use.

[0030] For example, in some embodiments, the upper surface of the base 1 is provided with a protruding ring 18 that inserts into the connecting hole 17. The protruding ring 18 can further limit the drive bracket 2 on the base 1, and also facilitate the installation and fixation of the drive bracket 2.

[0031] For example, in some embodiments, the limiting strip 6 is a triangular protrusion. There are four limiting strips 6. Of course, the triangular protrusions can be set to three, six, or other numbers evenly distributed, depending on the usage requirements, and are not limited to four in the preferred embodiment.

[0032] For example, in some embodiments, the bottom of the base 1 is provided with a mounting step 8, and the mounting step 8 is provided with a plurality of base mounting holes 9. This facilitates fixing the base 1 to the gear hobbing machine worktable with bolts.

[0033] For example, in some embodiments, the base mounting holes 9 are six evenly distributed. Of course, the number of base mounting holes 9 can be set to five, seven, or other numbers depending on the usage requirements, and is not limited to the six in the preferred embodiment.

[0034] For example, in some embodiments, the drive bracket 2 is detachably connected to the base 1 by six evenly distributed first bolts 7. Of course, the number of first bolts 7 can be four, eight, or other depending on the usage requirements, and is not limited to six in the preferred embodiment.

[0035] For example, in some embodiments, the drive body 3 is detachably connected to the drive bracket 2 via four evenly distributed second bolts 4. Of course, the number of second bolts 4 can be six, eight, or other depending on the usage requirements, and is not limited to four in the preferred embodiment.

[0036] In summary, the base of this utility model is connected to the worktable of the gear hobbing machine by bolts. The base can be selected according to the different bolt hole positions of different machine tools, thus adapting to various machine tools. The center point can also be selected according to the size of the center hole of different workpieces, adapting to different workpieces. The drive body can also be selected according to the end face size of different workpieces, adapting to different workpieces. This achieves the characteristic of adapting to different parts and different machine tools. Furthermore, the structure is simple and easy to manufacture, and the purely mechanical structure is also well-suited for older gear hobbing machines.

[0037] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A detachable gear hobbing drive center, characterized in that, The utility model provides a drive base, the drive base is provided with drive support on the base, the upper end surface of the base is in contact with the lower end surface of the drive support, the drive support is detachably connected with the base through the first bolt, the drive support is provided with drive body on the upper surface, the drive body is detachably connected with the drive support through the second bolt, the middle of the base is equipped with the first installation hole which penetrates the base up and down, the middle of the drive support is equipped with the second installation hole which penetrates the drive support up and down, the first installation hole and the second installation hole are communicated, the middle of the drive body is equipped with the third installation hole which penetrates the drive body up and down, the second installation hole and the third installation hole are communicated, the second installation hole is equipped with the centre, the upper end of the centre penetrates the third installation hole and extends to the drive body above, the lower end of the centre extends to the first installation hole, the lower end surface of the drive support is equipped with the spring installation hole which is coaxial with the second installation hole, the diameter of the spring installation hole is greater than the diameter of the second installation hole, the centre of the centre in the spring installation hole is equipped with the limiting ring, the lower end of the spring installation hole is equipped with the connecting hole which is greater than the diameter of the spring installation hole, the connecting hole is equipped with the first gasket which is sleeved on the centre, the hole diameter of the first installation hole upper end is less than the outer diameter of the first gasket, the lower end surface of the centre is equipped with the second gasket, the second gasket is fixed on the centre through the third bolt, the outer diameter of the second gasket is greater than the inner diameter of the first gasket, the spring is sleeved on the centre between the limiting ring and the first gasket, the spring is arranged in the spring installation hole, the upper end surface of the drive support is evenly equipped with a plurality of circumferential arrangement limit strips.

2. The detachable hobbing drive center according to claim 1, characterized in that The limiting ring and the centre are integrally processed and formed.

3. The detachable hobbing drive center according to claim 1, characterized in that The upper end surface of the base is provided with a convex ring inserted into the connecting hole.

4. The detachable hobbing drive center of claim 1, wherein, The limit strip is a triangular convex strip.

5. The detachable hobbing drive center of claim 1, wherein, The limit strip is four.

6. The detachable hobbing drive center of claim 1, wherein, The bottom of the base is provided with a mounting step, and the mounting step is provided with a plurality of base mounting holes.

7. The detachable hobbing drive center according to claim 6, characterized in that The base mounting holes are evenly distributed six.

8. The detachable hobbing drive center of claim 1, wherein, The drive support is detachably connected with the base through six evenly distributed first bolts.

9. The detachable hobbing drive center of claim 1, wherein, The drive body is detachably connected with the drive support through four evenly distributed second bolts.

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