Gear hobbing tool
By designing a gear hobbing processing tool for gears including inner support and adjusting parts, the problems of tooth bladder jumping and difficulty in removing in the prior art are solved, and higher installation stiffness and more convenient product removal are achieved.
Patent Information
- Application Number
- CN202421615277.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-09
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-07-09
AI Technical Summary
After the existing gear hob machining tooling is completed, the product ring gear is prone to jump and difficult to remove from the tooling.
A gear hobbing processing tool is designed, including a base, an inner support, a center shaft and an adjusting member. The inner support is equipped with a cross-shaped groove, and threads and connecting holes are provided on the center shaft. The tension and stability of the tooth embryo are achieved through the adjustment member and the fastening plate.
The tooling improves the installation stiffness of the tooth embryo through the design of the cross-shaped grooves and adjusting parts of the inner support, reduces the tooth embryo beating, and simplifies the product removal process.
Smart Images
Figure CN222957654U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of gear hobbing machining, and particularly to a gear hobbing machining tooling fixture. Background Art
[0002] Gear hobbing machining is an efficient gear machining method, usually used for producing gears in large quantities. In this machining method, the tooth profile of the gear is formed by rolling a hob or a roller on the gear, rather than by cutting.
[0003] When hobbing with an ordinary hobbing tooling fixture, by embedding it into the existing hobbing tooling fixture, that is, by inserting the tooth blank outside the dead hobbing mandrel. In this installation method, after hobbing machining, the tooth circle runout of the product is large, and it is not easy to remove the machined product from the tooling fixture after machining. For this, a gear hobbing machining tooling fixture is proposed to solve the above-mentioned problems. Utility Model Content
[0004] Aiming at the deficiencies of the prior art, the present application provides a gear hobbing machining tooling fixture, which has the advantages of good installation rigidity, the tooth blank is not easy to generate runout during machining, and it is convenient to clamp and take the product.
[0005] To achieve the above object, the present application provides the following technical solution: A gear hobbing machining tooling fixture, including a base, an inner support member is fixedly installed on the top of the base, a perforation is opened in the middle of the inner support member, and a centering shaft passing through the perforation is fixedly installed on the top of the base;
[0006] External threads are opened on the outside of the centering shaft, and an adjusting member located in the perforation is threadedly installed on the outside of the centering shaft;
[0007] A connection hole is penetrated and opened at the top end of the centering shaft, a threaded pin for fastening the tooth blank part is threadedly installed in the connection hole, and a fastening plate is fixedly connected to the top end of the threaded pin.
[0008] Further, a cross-shaped groove is opened downward at the top of the inner support member, the groove does not penetrate through the inner support member, the inner support member is equally divided into four petals, and the bottoms of the four-petal structures are commonly connected to the base.
[0009] Further, the upper end of the perforation and the inner wall of the inner support member are in a conical transition, and the diameter of the centering shaft is smaller than the diameter of the perforation.
[0010] Further, a pressing plate is integrally extended at the top end of the adjusting member.
[0011] Further, a hexagonal counterbore is opened at the top of the adjusting member.
[0012] Further, the adjusting member is in a cylindrical shape with a threaded hole formed in its inner wall, and the threaded hole is in threaded fit with the centering shaft.
[0013] Further, a chamfer is provided at the lower end of the pressure plate, and the pressure plate is attached to the cylindrical inclined surface of the perforation.
[0014] Compared with the prior art, the technical solution of the present application has the following beneficial effects:
[0015] For this gear hobbing processing tooling, by providing a cross-shaped groove on the inner support member, the convenience of subsequent disassembly of the gear blank is improved compared with the plug-in connection method of the dead hobbing mandrel of the existing tooling. Only by rotating the adjusting member located in the inner support member can the inner support member be relaxed. By providing a connection hole on the centering shaft and arranging a threaded pin and a fastening plate to tension the gear blank, the phenomenon of gear blank jumping during the hobbing process is reduced, and the processing accuracy is improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 is a schematic diagram of the overall structure of the present application;
[0017] Figure 2 is a three-dimensional structure diagram of the adjusting member of the present application;
[0018] Figure 3 is a top view of the inner support member of the present application.
[0019] In the figure: 1, base; 2, inner support member; 3, groove; 4, perforation; 5, centering shaft; 6, adjusting member; 61, pressure plate; 62, threaded hole; 63, hexagon countersunk hole; 7, connection hole; 8, threaded pin; 9, fastening plate. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.
[0021] Please refer to Figures 1 to 3 , a gear hobbing processing tooling in this embodiment includes a base 1. The base 1 is connected to a driving rotating shaft to drive the gear blank to rotate. An inner support member 2 is also fixedly installed on the top of the base 1.
[0022] Preferably, a cross-shaped groove 3 is formed downward from the top of the inner support member 2. The groove 3 does not penetrate the inner support member 2, so that the inner support member 2 can be equally divided into four petals, and the bottoms of the four-petal structures are commonly connected to the base 1.
[0023] With such a design, the cylindrical inner support member 2 can be divided into four petals that open outward to load the gear blank. Since the inner support member 2 has a certain toughness, although the bottom of the inner support member 2 is fixedly connected to the base 1, the part where the groove 3 is opened at the upper end can still be adjusted to a certain extent, which is convenient for taking out the gear blank after hobbing.
[0024] In this embodiment, a perforation 4 is further opened in the middle of the inner support member 2, and a centering shaft 5 passing through the perforation 4 is fixedly installed at the top of the base 1.
[0025] Preferably, the upper end of the perforation 4 and the inner wall of the inner support member 2 are in a conical transition, and the diameter of the centering shaft 5 is smaller than the diameter of the perforation 4, so as to provide an installation space for parts to be placed inside the perforation 4.
[0026] It should be noted that an external thread is opened on the outside of the centering shaft 5, and an adjusting member 6 located in the perforation 4 is installed on the external thread of the centering shaft 5. The adjusting member 6 is in a cylindrical shape and a threaded hole 62 is opened on the inner wall. The threaded hole 62 is in threaded cooperation with the centering shaft 5, and the outer diameter of the adjusting member 6 fits with the inner wall of the perforation 4 to improve the stability of the adjusting member 6.
[0027] Furthermore, a pressing plate 61 is integrally extended at the top end of the adjusting member 6 in this embodiment. A chamfer is opened at the lower end of the pressing plate 61, and the pressing plate 61 fits on the cylindrical inclined surface of the perforation 4.
[0028] With such a design, the adjusting member 6 can move relative to the centering shaft 5 under rotation, and the pressing plate 61 presses down on the perforation 4 to open the inner support member 2.
[0029] In this embodiment, a hexagonal counterbore 63 is further opened at the top of the adjusting member 6. By opening the hexagonal counterbore 63, it is convenient to use a tool to rotate the adjusting member 6.
[0030] It should be noted that a connecting hole 7 is penetrated and opened at the top end of the centering shaft 5, and a threaded pin 8 for fastening the gear blank is installed in the connecting hole 7 by internal thread. A fastening plate 9 is fixedly connected to the top end of the threaded pin 8. By assembling the fastening plate 9 at the upper end of the centering shaft 5 and pressing the gear blank close to the base 1, the jumping phenomenon of the gear blank can be weakened and the machining accuracy can be improved.
[0031] The working principle of the above embodiment is as follows:
[0032] By aligning the adjusting member 6 with the perforation 4 opened at the top of the inner support member 2 and using a tool to cooperate with the hexagonal counterbore 63 at the top end of the adjusting member 6, the adjusting member 6 is rotated, causing the adjusting member 6 and the centering shaft 5 to move downward in a threaded fit. The pressing plate 61 on the adjusting member 6 contacts the conical inclined surface on the perforation 4 downward, thereby squeezing the inner support member 2 to expand outward along the groove 3 and tightly adhere to the inner hole of the gear blank to complete the tensioning. Subsequently, the fastening plate 9 and the threaded pin 8 are assembled above the inner support member 2 by being threadedly connected to the centering shaft 5 and pressed downward against the gear blank, so as to weaken the jumping phenomenon of the gear blank during hobbing.
[0033] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the element.
[0034] Although the embodiments of the present application have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present application. The scope of the present application is defined by the appended claims and their equivalents.
Claims
1. A gear hobbing tool, comprising a base (1), characterized in that: An inner support member (2) is fixedly mounted on the top of the base (1), a through hole (4) is provided in the middle of the inner support member (2), and a centering shaft (5) passing through the through hole (4) is fixedly mounted on the top of the base (1); The centering shaft (5) is provided with an external thread on its exterior, and an adjusting member (6) located in the through hole (4) is installed on the external thread of the centering shaft (5); A connecting hole (7) is formed through the top end of the centering shaft (5), a threaded pin (8) for fastening the tooth blank is installed in the internal thread of the connecting hole (7), and a fastening plate (9) is fixedly connected to the top end of the threaded pin (8).
2. The gear hobbing tool according to claim 1, characterized in that: A cross-shaped groove (3) is provided downwardly at the top of the inner support member (2); the groove (3) does not penetrate the inner support member (2); the inner support member (2) is equally divided into four petals, and the bottom of the four-petal structure is commonly connected to the base (1).
3. The gear hobbing tool according to claim 1, characterized in that: The upper end of the through hole (4) and the inner wall of the inner support member (2) are in a conical transition, and the diameter of the centering shaft (5) is smaller than the diameter of the through hole (4).
4. The gear hobbing tool according to claim 1, characterized in that: A pressure plate (61) is also integrally extended from the top end of the adjusting member (6).
5. The gear hobbing tool according to claim 1, characterized in that: The top of the adjusting member (6) is also provided with a hexagonal countersunk hole (63).
6. The gear hobbing tool according to claim 1, characterized in that: The adjusting member (6) is cylindrical and has a threaded hole (62) on its inner wall. The threaded hole (62) and the centering shaft (5) are threadably matched.
7. The gear hobbing tool according to claim 4, characterized in that: The lower end of the pressure plate (61) is chamfered, and the pressure plate (61) fits against the cylindrical inclined surface of the through hole (4).