CN217193074U

CN217193074U - Gear hobbing tool for sun gear

Info

Publication number: CN217193074U
Application number: CN202220481440.3U
Authority: CN
Inventors: 邹友华; 冯杰; 邹华焱; 孙渝兴
Original assignee: Chongqing Zhier Mechanical Equipment Co ltd
Current assignee: Chongqing Zhier Mechanical Equipment Co ltd
Priority date: 2022-03-07
Filing date: 2022-03-07
Publication date: 2022-08-16
Anticipated expiration: 2032-03-07

Abstract

The utility model provides a sun gear hobbing frock, including being used for installing on gear hobbing machine swivel work head and along with gear hobbing machine swivel work head pivoted mount pad, locate main top on the mount pad, it is top to be used for driving the sun gear along with mount pad pivoted card clamping part and locate on the lathe tailstock with main top dead center, card clamping part has a plurality of jack catchs of arranging around main top along the circumferencial direction, the jack catch is used for the card to go into the spline groove of the outer integral key shaft of sun gear and cooperates with the spline groove of the outer integral key shaft of sun gear, main top upper end is formed with big end down's first conic section, the top lower extreme of tailstock is formed with big end down's second conic section. Since the technical scheme is used, the utility model provides a pair of sun gear hobbing frock is very convenient when the clamping sun gear, and the clamping precision is high.

Description

Gear hobbing tool for sun gear

Technical Field

The utility model belongs to the technical field of frock clamp, specifically a sun gear hobbing frock.

Background

As shown in fig. 1, the sun gear 1 includes an external spline shaft 11 and an external gear 12 fixed to the external spline shaft 11 with a coaxial axis, a core hole 13 is formed in the sun gear with a coaxial axis with the external spline shaft 11, one end of the core hole 13 penetrates through an end face of the external spline shaft 11, and the other end penetrates through an end face of the external gear 12.

When the sun gear is processed, gear shaping processing is firstly carried out on a sun gear blank to process an external spline shaft, and then gear hobbing processing is carried out on the sun gear to process an external gear. The existing sun gear hobbing tool is complex in structure, troublesome in clamping the sun gear and low in clamping precision of the sun gear.

SUMMERY OF THE UTILITY MODEL

To the technical problem that above-mentioned prior art exists, the utility model provides a convenient and high sun gear hobbing frock of clamping precision of clamping.

The utility model aims at realizing through such technical scheme, it is including being used for installing on gear hobbing machine swivel work head and along with gear hobbing machine swivel work head pivoted mount pad, locate main top on the mount pad, locate and be used for driving the sun gear along with mount pad pivoted card solid portion and locate on the lathe tailstock with main top dead center just right tailstock, card solid portion has a plurality of jack catchs of arranging around main top along the circumferencial direction, the jack catch is used for the card to go into the spline groove of sun gear external spline axle and with the spline groove cooperation of the external spline axle of sun gear, main top upper end is formed with big-end-up's first conic section, the top lower extreme of tailstock is formed with big-end-up's second conic section.

Furthermore, the clamping part is also provided with a fixing ring which is annularly arranged around the main tip, the first conical section is positioned on the upper side of the fixing ring, and the clamping jaws are fixed on the upper end face of the fixing ring.

Further, the jaws are integrally formed with the fixing ring.

Furthermore, a step hole is formed in the fixing ring, a screw hole opposite to the step hole is formed in the mounting seat, and a bolt penetrates through the step hole and then is screwed in the screw hole.

Further, a cylindrical section matched with the inner hole of the fixing ring is formed at the lower end of the main tip, and the cylindrical section is located in the inner hole of the fixing ring and fixedly connected with the mounting seat.

Since the technical scheme is used, the beneficial effects of the utility model are that:

when the sun wheel blank is clamped on the hobbing tool, the external spline shaft on the sun wheel faces downwards, the external spline shaft on the sun wheel is inserted into a plurality of clamping jaws, the clamping jaws are clamped into corresponding spline grooves, the upper end of the first conical section is inserted into the lower end of the core hole, the tailstock center is moved downwards and inserted into the upper end of the core hole, the tailstock center provides downward pressure for the sun wheel, at the moment, the first conical section expands tightly at the lower end of the core hole, and the second conical section expands tightly at the upper end of the core hole. Thus, the clamping of the sun wheel is completed. The clamping of the sun wheel is very convenient. The first conical section and the second conical section are respectively expanded at two ends of the core hole to play a centering role, the plurality of clamping jaws are respectively clamped into the plurality of spline grooves on the outer spline shaft, and the clamping jaws are matched with the spline grooves, so that the clamping precision of the sun gear is further improved, and the clamping precision of the sun gear hobbing tool is high; sun gear hobbing frock simple structure, the cost of manufacture is low.

Drawings

FIG. 1 is a schematic view of the sun gear;

fig. 2 is a schematic structural view of a preferred embodiment of the sun gear hobbing tool of the present invention.

Fig. 3 is a use state diagram of the sun gear hobbing tool in fig. 1.

In the figure, 1, sun gear; 11. an external spline shaft; 12. an outer gear; 13. a core hole; 2. a mounting seat; 3. a main center; 4. a clamping part; 5. a tailstock center; 31. a first conical section; 32. a cylindrical section; 41. a fixing ring; 42. a stepped bore; 21. a screw hole; 6. a bolt; 43. a claw is provided.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand and understand, the present invention is further explained by combining with the specific drawings.

As shown in fig. 2, the present invention includes a mounting base 2, a main tip 3, a fastening portion 4 and a tailstock tip 5. The mounting seat 2 is used for being mounted on a rotary workbench of the gear hobbing machine, and therefore the mounting seat 2 can rotate along with the rotary workbench of the gear hobbing machine. The main centre 3 is arranged on the mounting seat 2, a first conical section 31 with a small upper part and a large lower part is formed at the upper end of the main centre 3, a cylindrical section 32 is formed at the lower end of the main centre 3, and the cylindrical section 32 is fixedly connected with the mounting seat 2. In the present embodiment, the cylindrical section 32 is formed integrally with the mounting base 2, but in some embodiments, the cylindrical section 32 can also be disposed on the mounting base 2 by other methods, for example, the cylindrical section 32 is disposed on the mounting base 2 by welding with the mounting base 2.

The clamping portion 4 is arranged on the mounting base 2, the clamping portion 4 is used for driving the sun gear 1 to rotate along with the mounting base 2, and the clamping portion 4 is provided with a fixing ring 41 which is annularly arranged around the main center 3. Specifically, the cylindrical section 32 is located in an inner hole of the fixing ring 41, the cylindrical section 32 is matched with the inner hole of the fixing ring 41, a step hole 42 is formed in the fixing ring 41, a screw hole 21 opposite to the step hole 42 is formed in the mounting base 2, and a bolt 6 penetrates through the step hole 42 and then is screwed in the screw hole 21. The fixing ring 41 can be fixed to the mount base 2 by inserting the bolts 6 through the stepped holes 42 and screwing them into the screw holes 21. The fixing ring 41 can be fixed to the mount base 2 by using the bolts 6, and when the fixing ring 41 is fixed to the mount base 2, the cylindrical section 32 can play a role in positioning the fixing ring 41, and the error in the mounting position of the fixing ring 41 can be reduced. The bolt 6 can be screwed out from the screw hole 21, so that the fixing ring 41 is convenient to detach and replace. In other embodiments, the fixing ring 41 can also be arranged on the mounting base 2 by welding.

The first tapered section 31 is located on the upper side of the fixing ring 41, and the first tapered section 31 is not shielded by the fixing ring 41 and can be smoothly inserted into the core hole 13 of the sun gear 1. The clamping portion 4 has a plurality of claws 43, the claws 43 are fixed on the upper end surface of the fixing ring 41, specifically, the claws 43 are formed integrally with the fixing ring 41, it is understood that the claws 43 and the fixing ring 41 are not limited to the connection manner described above, for example, in some embodiments, the claws 43 can also be fixed on the fixing ring 41 by welding. The clamping jaws 43 are arranged around the main tip 3 along the circumferential direction, the clamping jaws 43 are used for being clamped into the spline grooves of the external spline shaft 11 of the sun gear 1, and the clamping jaws 43 are matched with the spline grooves of the external spline shaft 11 of the sun gear 1.

The tailstock center 5 is arranged on a tailstock of the machine tool, the tailstock center 5 is opposite to the main tailstock center 3, and a second taper section with a large top and a small bottom is formed at the lower end of the tailstock center 5.

The use principle is as follows: as shown in fig. 3, when the blank sun gear 1 is mounted on the hobbing tool, the male spline shaft on the sun gear 1 is made to face downward, the male spline shaft on the sun gear 1 is inserted between the plurality of claws 43, the claws 43 are engaged in the corresponding spline grooves, the upper end of the first tapered section 31 is inserted into the lower end of the core hole 13, the tailstock center 5 is moved downward on the tailstock of the machine tool, the tailstock center 5 is inserted into the upper end of the core hole 13, the tailstock center 5 applies downward pressure to the sun gear 1, and at this time, the first tapered section 31 is expanded tightly at the lower end of the core hole 13, and the second tapered section is expanded tightly at the upper end of the core hole 13. Thus, the clamping of the sun gear 1 is completed. The clamping of the sun wheel 1 is very convenient. The first conical section 31 and the second conical section are respectively expanded at two ends of the core hole 13 to play a centering role, the plurality of clamping claws 43 are respectively clamped into the plurality of spline grooves on the outer spline shaft 11, the clamping claws 43 are matched with the spline grooves, and the clamping precision of the sun gear 1 is further improved, so that the clamping precision of the hobbing tool for the sun gear 1 of the utility model is high; 1 gear hobbing frock of sun gear simple structure, the cost of manufacture is low. In the hobbing process of the outer gear 12 of the sun gear 1, the rotary workbench of the hobbing machine drives the mounting base 2 to rotate, the fixing ring 41 and the clamping jaws 43 rotate along with the mounting base 2, and the clamping jaws 43 are clamped in the spline grooves of the outer spline shaft 11 of the sun gear 1, so that the sun gear 1 can be driven to rotate, and the clamping part 4 is driven to drive the sun gear 1 to rotate along with the mounting base 2.

The above is only the embodiment of the present invention, not the limitation of the patent scope of the present invention, all the equivalent structures made by the contents of the specification and the drawings are directly or indirectly applied to other related technical fields, all the same principle is within the patent protection scope of the present invention.

Claims

1. The utility model provides a sun gear hobbing frock which characterized in that: including being used for installing on gear hobbing machine swivel work head and along with gear hobbing machine swivel work head pivoted mount pad, locate main top on the mount pad, locate and be used for driving sun gear along with mount pad pivoted card solid portion and locate the lathe tailstock on the tailstock just right with main top, card solid portion has a plurality of jack catchs of arranging around main top along the circumferencial direction, the jack catch is used for the card to go into the spline groove of sun gear external spline shaft and cooperates with the spline groove of the external spline shaft of sun gear, the upper end of main top is formed with big end down's first conic section, the lower extreme of tailstock top is formed with big end down's second conic section.

2. The sun gear hobbing tool according to claim 1, characterized in that: the clamping part is further provided with a fixing ring which is annularly arranged around the main tip, the first conical section is located on the upper side of the fixing ring, and the clamping jaws are fixed on the upper end face of the fixing ring.

3. The sun gear hobbing tool according to claim 2, characterized in that: the jaws are integrally formed with the retaining ring.

4. The sun gear hobbing tool according to claim 2, characterized in that: the fixing ring is provided with a step hole, the mounting seat is provided with a screw hole opposite to the step hole, and a bolt penetrates through the step hole and then is screwed in the screw hole.

5. The sun gear hobbing tool according to claim 2, characterized in that: the lower end of the main tip is provided with a cylindrical section matched with the inner hole of the fixing ring, and the cylindrical section is located in the inner hole of the fixing ring and is fixedly connected with the mounting seat.