Indexable hobbing cutter

Abstract

The utility model provides an indexable hobbing cutter which comprises a limiting shell and a threaded connection seat, the overlook cross section of the limiting shell is of a circular structure, the limiting shell is installed in an external machine tool cutter changing mechanism, and inner ring teeth used for limiting rotation of a plurality of sets of inner planet wheels are arranged on the inner side of the limiting shell. The inner side of the inner ring tooth is provided with three sets of inner planet gears used for driving the first gear hobbing cutter body, the second gear hobbing cutter body and the third gear hobbing cutter body to change the positions of the first gear hobbing cutter body, the second gear hobbing cutter body and the third gear hobbing cutter body. A power tooth groove is used for being meshed with an external motor driving end, a cutter power shaft hole is used for being communicated with a machine tool cutter driving shaft, and a threaded connection base is used for being in threaded limited connection with a first hobbing cutter body, a second hobbing cutter body and a third hobbing cutter body.

Description

Technical Field

[0001] The utility model belongs to the technical field of hobbing cutters for machine tools, and relates to an indexable hobbing cutter. Background Art

[0002] A hobbing cutter is a tool widely used in gear processing. It adopts a hobbing machining method. Through the rotation and feeding movement of the cutter, a high-precision gear tooth profile is gradually machined on the workpiece. During the hobbing process, the rotational movement of the hobbing cutter is the main movement. At the same time, the cutter also needs to have a feeding movement along the axis direction of the workpiece, as well as additional rotations as required to machine different types of gears. During the hobbing process, the quick replacement of multiple hobbing cutters is an important link to ensure production efficiency and machining quality. If the cutter cannot be quickly replaced during the replacement process, a series of problems will occur. These problems not only affect the production progress but may also have an adverse impact on machining quality and equipment safety. In the existing technology, on numerically controlled hobbing machines with a high degree of automation, the quick replacement of cutters is usually achieved through an automatic tool changer system. The internal tool changer system of its automatic tool changer system is relatively complex. If a malfunction occurs in the tool changer system, resulting in the cutter being unable to move to the predetermined position, then the machine tool will have to pause work and wait for manual intervention to repair or replace the cutter, which will undoubtedly waste a large amount of precious production time. The inability to quickly replace the cutter will lead to production interruptions, thereby affecting the overall production efficiency. Therefore, there is an urgent need for an indexable hobbing cutter to solve the above problems. Summary of the Utility Model

[0003] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide an indexable hobbing cutter to solve the problems raised in the above background art.

[0004] The utility model is realized through the following technical solutions: an indexable hobbing cutter, comprising: a limit shell and a threaded socket. The top view cross-section of the limit shell is a circular structure;

[0005] The limit shell is installed inside the external machine tool tool changer mechanism. An inner ring gear for limiting the rotation of several groups of inner planet gears is arranged inside the limit shell. Three inner planet gears for driving the hobbing cutter body one, the hobbing cutter body two, and the hobbing cutter body three to change positions are arranged inside the inner ring gear;

[0006] The three inner planet gears are annularly distributed inside the inner ring gear, and the outer sides of the three inner planet gears are all movably meshed with the inner ring gear. A set of inner power gears for providing rotational power to the three inner planet gears is arranged at the middle position inside the three inner planet gears. The outer side of the inner power gear is meshed with the three inner planet gears, and the inner ring gear can be used to limit the rotational movement of several groups of inner planet gears.

[0007] As a preferred embodiment, a power tooth groove for meshing with the driving end of an external motor is provided at the middle position inside the inner power gear. The inner side of the power tooth groove meshes with the driving end of the external motor, and the power tooth groove can be used to mesh with the driving end of the external motor.

[0008] As a preferred embodiment, a set of upper movable covers for keeping the three inner planet gears rotating synchronously are provided at the upper ends of the three inner planet gears. Three tool power shaft holes for penetrating the driving shaft of the machine tool tool are provided at the upper ends of the upper movable covers, and the tool power shaft holes can be used to penetrate the driving shaft of the machine tool tool.

[0009] As a preferred embodiment, a set of upper limit seats for limiting the upper ends of the inner planet gears are provided outside each set of the tool power shaft holes. Inner movable bearings for keeping the hob cutter body one, the hob cutter body two, and the hob cutter body three rotating independently are provided inside the inner planet gears.

[0010] As a preferred embodiment, the three inner movable bearings have the same specifications, and the inner movable bearings are a kind of limit bearings. A set of threaded connection seats for threadedly limiting and connecting with the hob cutter body one, the hob cutter body two, and the hob cutter body three are provided inside each set of the inner movable bearings, and the threaded connection seats can be used to threadedly limit and connect with the hob cutter body one, the hob cutter body two, and the hob cutter body three.

[0011] As a preferred embodiment, each set of the threaded connection seats is correspondingly and internally limitedly connected with a set of inner movable bearings, and the hob cutter body one, the hob cutter body two, and the hob cutter body three are installed according to the required dimensions.

[0012] As a preferred embodiment, a set of inner screw groove joints for threadedly locking with the threaded connection seats are provided at the upper ends of the hob cutter body one, the hob cutter body two, and the hob cutter body three. A set of inner fixing holes for connecting and fixing with the corresponding threaded connection seats by bolts are provided inside the hob cutter body one, the hob cutter body two, and the hob cutter body three.

[0013] After adopting the above technical solutions, the beneficial effects of the present utility model are as follows: By using the inner ring teeth to limit the rotation of several groups of inner planet gears, by using the power tooth groove to mesh with the driving end of the external motor, by using the tool power shaft holes to penetrate the driving shaft of the machine tool tool, by using the threaded connection seats to threadedly limit and connect with the hob cutter body one, the hob cutter body two, and the hob cutter body three, and by using the three inner planet gears, the hob cutter body one, the hob cutter body two, and the hob cutter body three can be quickly driven to perform tool changing operations. Description of the Drawings

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0015] Figure 1 It is a front-side top view structural schematic diagram of a indexable hobbing cutter of the present invention;

[0016] Figure 2 It is a bottom structural schematic diagram of a indexable hobbing cutter of the present invention;

[0017] Figure 3 It is a front-side top view structural schematic diagram of hobbing cutter body one of a indexable hobbing cutter of the present invention;

[0018] Figure 4 It is a structural schematic diagram of the bottom of the inner movable bearing inside the inner planet gear of a indexable hobbing cutter of the present invention;

[0019] In the figure: 100 - limit shell, 110 - inner ring gear, 120 - inner planet gear, 130 - upper movable cover plate, 140 - upper limit seat, 150 - cutter power shaft hole, 160 - inner power gear, 170 - power tooth groove, 180 - hobbing cutter body one, 190 - inner fixing hole, 200 - hobbing cutter body two, 210 - hobbing cutter body three, 220 - inner movable bearing, 230 - threaded socket. Detailed implementation manners

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0021] Please refer to Figures 1 - 4 , a indexable hobbing cutter, including: a limit shell 100, an inner planet gear 120, a hobbing cutter body one 180 and a threaded socket 230. The limit shell 100 has a circular cross-section in a top view;

[0022] The limit housing 100 is installed inside the external tool changing mechanism of the machine tool. Inside the limit housing 100, there is an inner ring gear 110 for limiting the rotation of several groups of inner planet gears 120. Inside the inner ring gear 110, there are three groups of inner planet gears 120 for driving the hobbing tool body one 180, the hobbing tool body two 200, and the hobbing tool body three 210 to change positions.

[0023] The three groups of inner planet gears 120 are annularly distributed inside the inner ring gear 110, and the outer sides of the three groups of inner planet gears 120 are all movably meshed with the inner ring gear 110. In the middle position inside the three groups of inner planet gears 120, there is an inner power gear 160 for providing rotational power to the three groups of inner planet gears 120. The outer side of the inner power gear 160 is meshed with the three groups of inner planet gears 120, and the inner ring gear 110 can be used to limit the rotation of several groups of inner planet gears 120.

[0024] In the middle position inside the inner power gear 160, there is a power tooth groove 170 for meshing with the driving end of the external motor. The inside of the power tooth groove 170 is meshed with the driving end of the external motor, and the power tooth groove 170 can be used to mesh with the driving end of the external motor.

[0025] Above the three groups of inner planet gears 120, there is an upper movable cover plate 130 for keeping the three groups of inner planet gears 120 rotating synchronously. Above the upper movable cover plate 130, there are three tool power shaft holes 150 for penetrating the tool driving shaft of the machine tool, and the tool driving shaft of the machine tool can penetrate through the tool power shaft holes 150.

[0026] Outside each tool power shaft hole 150, there is an upper limit seat 140 for limiting the upper end of the inner planet gear 120. Inside the inner planet gear 120, there is an inner movable bearing 220 for keeping the hobbing tool body one 180, the hobbing tool body two 200, and the hobbing tool body three 210 rotating independently.

[0027] The three groups of inner movable bearings 220 have the same specifications, and the inner movable bearing 220 is a kind of limit bearing. Inside each inner movable bearing 220, there is a threaded connection seat 230 for threadedly limiting the connection with the hobbing tool body one 180, the hobbing tool body two 200, and the hobbing tool body three 210, and the threaded connection seat 230 can be used to threadedly limit the connection with the hobbing tool body one 180, the hobbing tool body two 200, and the hobbing tool body three 210.

[0028] Each set of threaded connectors 230 is correspondingly and internally limitedly connected to a set of inner movable bearings 220. The hob tool body one 180, the hob tool body two 200, and the hob tool body three 210 are installed according to the required dimensions. A set of inner fixing holes 190 for being fixedly connected to the corresponding threaded connectors 230 by bolts are provided inside the hob tool body one 180, the hob tool body two 200, and the hob tool body three 210.

[0029] Please refer to Figures 1 - 4 , as the first embodiment of the present invention: First, the staff installs the present invention in the hobbing machine tool. Since a power tooth groove 170 for meshing with the driving end of the external motor is provided at the middle position inside the inner power tooth, and the inner side of the power tooth groove 170 meshes with the driving end of the external motor. When the staff needs to perform a tool change operation, the inner power tooth is driven to rotate by the driving end of the external motor, and the inner power tooth simultaneously drives the three sets of inner planet gears 120 to rotate synchronously. Until the tool to be switched is located directly below the tool driving end of the hobbing machine tool, the tool driving end of the hobbing machine tool is inserted into the tool power shaft hole 150, and the selected hob tool can be driven, while simplifying the complexity of the existing tool change mechanism of the hobbing machine tool and reducing the probability of failure.

[0030] Please refer to Figures 1 - 4 , as the second embodiment of the present invention: Based on the description in the above embodiment, further, since a set of inner screw groove joints for mutually thread-locking with the threaded connectors 230 are provided at the upper ends of the hob tool body one 180, the hob tool body two 200, and the hob tool body three 210. When the staff needs to batch replace the hob tool bodies, the multiple hob tool bodies at the upper ends of the threaded connectors 230 can be directly screwed out and disassembled, thereby improving the tool installation speed.

[0031] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An indexable hobbing tool, comprising: A limit housing (100), an internal planet gear (120), a hobbing cutter body I (180), and a threaded socket (230), characterized in that: the limit housing (100) has a circular cross-section in a top view; The limit housing (100) is installed inside an external machine tool tool changing mechanism. An inner ring gear (110) for limiting the rotation of a plurality of groups of internal planet gears (120) is provided inside the limit housing (100). Three internal planet gears (120) for driving the hobbing cutter body I (180), the hobbing cutter body II (200), and the hobbing cutter body III (210) to change positions are provided inside the inner ring gear (11); The three internal planet gears (120) are annularly distributed inside the inner ring gear (110), and the outer sides of the three internal planet gears (120) are all movably engaged with the inner ring gear (110). An internal power gear (160) for providing rotational power to the three internal planet gears (120) is provided at the middle position inside the three internal planet gears (120). The outer side of the internal power gear (160) is engaged with the three internal planet gears (120).

2. The indexable hobbing cutter according to claim 1, characterized in that: A power tooth groove (170) for engaging with the driving end of an external motor is provided at the middle position inside the internal power gear (160), and the inside of the power tooth groove (170) is engaged with the driving end of the external motor.

3. The indexable gear hobbing tool according to claim 1, characterized in that: An upper movable cover plate (130) for keeping the three internal planet gears (120) rotating synchronously is provided at the upper ends of the three internal planet gears (120). Three tool power shaft holes (150) for penetrating through the tool driving shaft of the machine tool are provided at the upper end of the upper movable cover plate (130).

4. The indexable hobbing cutter according to claim 3, characterized in that: An upper limit seat (140) for limiting the upper end of the internal planet gear (120) is provided outside each tool power shaft hole (150). An internal movable bearing (220) for keeping the hobbing cutter body I (180), the hobbing cutter body II (200), and the hobbing cutter body III (210) rotating independently is provided inside the internal planet gear (120).

5. The indexable gear hobbing tool according to claim 4, characterized in that: The three internal movable bearings (220) have the same specifications, and the internal movable bearing (220) is a kind of limit bearing. A threaded socket (230) for threadedly limiting and connecting with the hobbing cutter body I (180), the hobbing cutter body II (200), and the hobbing cutter body III (210) is provided inside each internal movable bearing (220).

6. The indexable hobbing cutter according to claim 5, characterized in that: Each threaded socket (230) is correspondingly and limitedly connected inside a group of internal movable bearings (220).

7. A indexable hobbing cutter according to claim 4, characterized in that: An internal thread groove joint for threadedly locking with the threaded socket (230) is provided at the upper ends of the hobbing cutter body I (180), the hobbing cutter body II (200), and the hobbing cutter body III (210); An internal fixing hole (190) for fixedly connecting with the corresponding threaded socket (230) by bolts is provided inside the hobbing cutter body I (180), the hobbing cutter body II (200), and the hobbing cutter body III (210).

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