CN209110332U - A link structure of the cutter bar and the tail end of a gear hobbing machine - Google Patents

Abstract

A link structure of a cutter bar and a tail end of a gear hobbing machine, comprising a cutter bar, a jacking device at the tail end of the gear hobbing machine, the end of the cutter bar is matched with the jacking device, and characterized in that the end of the cutter bar is An adapter sleeve is included, and the outer side of the adapter sleeve is adapted to the pressing device. The utility model improves the integrated structure of the original cutter bar into the existing cutter bar and the split structure of the adapter sleeve. Different cutter bars have the same end protrusion size, so all the cutter bars can be connected with the same adapter. It is no longer necessary to replace or remake a new jacking device at the end of the gear hobbing machine when used together with the sleeve, saving the processing and management costs when adding or replacing new tools in the future. The protrusion at the end of the tool holder is a cylinder, and the adapter sleeve is a round table. When used together, the end of the new tool holder only needs to be processed into a cylinder, and the processing cost and machining accuracy of the cylinder are better than that of the round table. The protrusion on the end of the adapter sleeve and the tool shank has an arc transition, which is convenient for use.

Description

A link structure of the cutter bar and the tail end of a gear hobbing machine

technical field

The utility model relates to a gear hobbing machine, in particular to a link structure of a cutter bar and a tail end of the gear hobbing machine.

Background technique

Gear hobbing machine is one of the most widely used machine tools in gear processing machine tools. It can cut spur gears, helical gears, worm gears, sprockets, etc. on the gear hobbing machine. A gear processing machine tool that uses a hob to process spur, helical and herringbone cylindrical gears and worm gears according to the generation method. This machine tool can also process workpieces with various special tooth shapes such as splines and sprockets when using a special hob. The machining accuracy of ordinary gear hobbing machines is 7 to 6 grades (JB179-83), and the high-precision gear hobbing machines are 4 to 3 grades, with a maximum processing diameter of 15 meters.

When the current gear hobbing machine is used for processing, the processing tool of the gear hobbing is constantly replaced with the change of the gear to be processed, and the tool holder used with the processing tool is also replaced together. The size of the protrusions at the end of the cutter bar that fits with the hobbing machine tail end jacking device is smaller than the diameter of the shaft where the cutter bar is installed, so there are several protrusions of different sizes on a set of cutter bars. Therefore, it is very troublesome to replace the top clamping device at the end of the gear hobbing machine together with the cutter bar. The gear hobbing machine has many parts for the rear end jacking device, which is more troublesome to replace, time-consuming and laborious, and frequent replacement of the tail end jacking device will affect the installation accuracy of the tail end jacking device. A gear hobbing machine needs to be equipped with multiple sets of jacking devices, and the management and maintenance costs in later use are relatively high.

SUMMARY OF THE INVENTION

In order to solve the above problems, the utility model provides a link structure of the cutter bar and the tail end of the gear hobbing machine, which does not require the replacement of the tail end pressing device of the gear hobbing machine when replacing the cutter bar, which can save a lot of replacement time.

The utility model adopts the following technical scheme: a link structure of a cutter bar and a tail end of a gear hobbing machine, comprising a cutter bar and a top tightening device at the tail end of the gear hobbing machine. The end of the cutter bar includes an adapter sleeve, and the outer side of the adapter sleeve is adapted to the pressing device. The integrated structure of the original cutter bar is improved into two parts: the existing cutter bar and the adapter sleeve. The same adapter sleeve can be installed on the ends of different cutter bars. It is no longer necessary to replace the jacking device at the end of the gear hobbing machine. Reduce the post-maintenance cost of the tail end jacking device.

Compared with the above solution, further, the adapter sleeve and the cutter bar are connected in a sleeved manner. The sleeve is simple in structure, simple in processing and low in cost.

Compared with the above solution, further, the end of the cutter bar is provided with a protrusion, and the adapter sleeve is inserted on the protrusion, and the structure is simple.

Compared with the above solution, further, the protrusion is a cylinder. The cylindrical structure is convenient for processing and the processing cost is low.

Compared with the above solution, further, the adapter sleeve is a circular table. The taper of the round table has good self-locking performance, high positioning accuracy, convenient installation, and the influence of repeated assembly and disassembly on the positioning accuracy is small.

Compared with the above solution, further, the hole of the adapter sleeve is a through hole. The through-hole structure is easy to process, and the general type is good.

Compared with the above solution, further, both ends of the adapter sleeve have arc transitions, which is convenient for installation.

Compared with the original scheme, the improvement point of the present utility model is that the integrated structure of the original cutter bar is improved to the existing cutter bar and the split structure of the adapter sleeve, and different cutter bars have the same end protrusion size, so all the All the tool holders can be used with the same adapter sleeve, and it is no longer necessary to replace or remake a new clamping device, saving the processing and management costs when adding or replacing new tools in the future. The protrusion at the end of the tool holder is a cylinder, and the adapter sleeve is a round table. When used together, the end of the new tool holder only needs to be processed into a cylinder of the same size, and the processing cost and machining accuracy of the cylinder are better than that of the round table. The protrusion on the end of the adapter sleeve and the tool shank has an arc transition, which is convenient for use.

Description of drawings

FIG. 1 is a schematic diagram of a conventional cutter bar.

FIG. 2 is a schematic view of the utility model when the cutter bar and the adapter sleeve are assembled together.

FIG. 3 is a schematic diagram of the utility model when the cutter bar and the adapter sleeve are separated.

FIG. 4 is a schematic diagram of the adapter sleeve of the present invention.

FIG. 5 is a schematic view of the installation of the cutter bar and the adapter sleeve of the utility model on the gear hobbing machine.

FIG. 6 is a schematic diagram of the connection between the cutter bar and the adapter sleeve of the utility model after being assembled with the tail end pressing device of the gear hobbing machine.

FIG. 7 is the second embodiment of the adapter sleeve of the present invention.

FIG. 8 is the protrusion structure corresponding to the second embodiment of the tool bar and the adapter sleeve of the present invention.

FIG. 9 is a cross-sectional view of the first embodiment of the adapter sleeve of the present invention.

FIG. 10 is a front view of the first embodiment of the adapter sleeve of the present invention.

Detailed ways

FIG. 3 is a schematic view of the cutter bar 1 and the adapter sleeve 3 after assembly. The circular table of the cutter bar 1 on the right side of Fig. 3 is adapted to the front end device 5 of the gear hobbing machine, and the repeatability of the taper is better. The cutter bar 1 is installed on the front end device 5 and is connected with the driving device of the front end device 5, and the driving device will drive the cutter bar to rotate and perform gear hobbing processing on the parts. The driving device of the utility model is a built-in hollow motor, the hollow motor directly drives the cutter bar 1, and the built-in motor can reduce the connection parts between the motor and the cutter bar 1, reduce the volume and weight of the gear hobbing machine, and improve the stability of the equipment to a certain extent. The cutter bar 1 is connected to the rear end jacking device 4 of the gear hobbing machine corresponding to the round table on the left side of FIG. 3 . The jacking device 4 has a hole that matches the cutter bar 1 corresponding to the circular table on the left side of FIG. 3 . When the tool bar 1 is installed on the front end device 5, the jacking device 4 moves towards the front end device 5 to move the tool bar 1. Hold tight.

The gear hobbing cutter has an inner hole, which is matched with the shank corresponding to the elongated shaft on the left side of FIG. 3 . During installation, the hobbing cutter is installed into the cutter bar from the left side of Fig. 3 along the symmetrical axis of the cutter bar, so the diameter of the original cutter bar corresponding to the circular table at the left end of Fig. 1 is less than or equal to the diameter of the slender shaft, otherwise the hobbing cutter cannot be installed . Gear hobbing machines are generally equipped with multiple knives. When the size deviation of the knives is large, the original shank will have several sizes corresponding to the round table on the left side of Figure 1, and there will also be several sets of end clamping devices suitable for it. It needs to be replaced when necessary, and each set needs to be maintained later (such as adding lubricating grease, replacing wearing parts, etc.), and the cost is high.

The utility model divides the existing cutter bar into a cutter bar 1 and an adapter sleeve 3, and the adapter sleeve 3 and the cutter bar 1 are inserted through a sleeve (the adapter sleeve 3 is inserted into the cutter bar 1 or the inner hole sleeve of the cutter bar 1 is inserted and rotated The adapter sleeve 3 has a universal type and can be installed and used on all the cutter bars 1 of the gear hobbing machine.

The utility model adopts the way of inserting three sets of adapter sleeves on the protrusion 2 of the cutter bar 1 for installation. The way in which the adapter sleeve 3 is inserted into the tool bar 1 is that the light hole of the adapter sleeve 3 is adapted to the protrusion 2 of the tool bar 1 . The left end of the cutter bar 1 corresponding to FIG. 3 is provided with a protrusion 2, and the protrusion 2 can be any structure whose size is smaller than the long axis diameter of the cutter bar 1 corresponding to the left side of FIG. ,Round table. The protrusion 2 of the present invention is designed as a cylinder, and the diameter of the cylinder is less than or equal to the long axis of the cutter bar 1 on the left side of FIG. 3 . Compared with the round table, the cylindrical structure is more convenient to process, which can ensure the machining accuracy and reduce the machining cost. Different cutter bars 1 of the gear hobbing machine are all provided with cylinders of the same structural size. When it is necessary to add or replace a new tool bar 1 in the future, it is only necessary to process a cylinder of the same size at one end of the tool bar 1 , so that the adapter sleeve 3 can be installed on all the tool bars 1 . The adapter sleeve 3 is provided with an inner hole corresponding to the protrusion 2 , the inner hole is matched with the protrusion 2 , and the inner hole is coaxial with the adapter sleeve 3 . When installing the cutter bar 1 on the gear hobbing machine, it is only necessary to insert the 3 adapter sleeves into the protrusion 2 of the cutter bar 1. The adapter sleeve 3 is in the shape of a truncated cone. Compared with the cylinder, the truncated adapter sleeve 3 has good taper self-locking performance, high positioning accuracy, and convenient installation when the tail end clamping device is matched with the positioning accuracy. less impact. Because the adapter sleeve 3 can be installed after the gear cutter is installed, the adapter sleeve 3 can be larger than the long axis of the tool bar 1 corresponding to the left side of FIG. 2 .

When the cutter bar 1 and the adapter sleeve 3 move after being assembled outside the hobbing machine, the cutter bar 1 and the adapter sleeve 3 may be separated, and when the adapter sleeve is small, it is easy to lose. In order to keep the cutter bar 1 and the adapter sleeve 3 from being separated by themselves after assembly, the present invention provides the following two solutions.

Embodiment 1: The inner hole of the adapter sleeve 3 is provided with an internal thread, the protrusion 2 of the tool shank 1 is provided with an external thread, the adapter sleeve 3 and the tool shank 1 are connected by a thread, and the rotation direction of the thread is rotated with the gear hobbing tool. In the opposite direction, the adapter sleeve 3 and the cutter bar 1 can be turned more and more tightly when they are used on the hobbing machine. To remove the adapter sleeve 3, two parallel planes are machined on the outer circumferential surface of the adapter sleeve 3, and the adapter sleeve can be unscrewed with a wrench. The structure of the adapter sleeve 3 is shown in Figures 9 and 10.

Embodiment 2: An elastic device 7 is arranged in the inner wall of the adapter sleeve 3. The elastic device 7 is a spring, and the end of the spring is provided with a ball 6. Part of the ball 6 is exposed in the inner hole of the adapter sleeve 3, and the protrusion 2 A first groove 9 is provided at a position corresponding to the ball 6 . After assembly, the part of the ball exposed in the inner hole will be in the first groove 9, which is an annular groove for the convenience of assembly. The specific structural parts are shown in Figure 7 and Figure 8.

The working principle of the present invention will be explained below. One end of all cutter bars 1 of the gear hobbing machine is provided with cylindrical protrusions 3 of the same size, and the structural dimensions of the protrusions 3 correspond to the holes of the adapter sleeve 3 . When in use, the adapter sleeve 3 is inserted into the cutter bar 1, and the jacking device 4 is against the adapter sleeve 3 to tighten the cutter bar 1. When the gear hobbing machine needs to replace the cutter and cutter bar, after removing the jacking device 4, it is only necessary to remove the adapter sleeve 3 from the cutter bar 1, and then insert it into the new cutter bar 1 with the cutter to be replaced, and finally Just install it on the gear hobbing machine.

Claims (7)

1. a kind of knife bar of gear-hobbing machine and the link structure of tail end, including knife bar (1), the holding device (4) of gear hobbing machine tail end, institute The end for stating knife bar (1) is matched with the holding device (4), which is characterized in that the end of the knife bar (1) includes switching It covers (3), is adapted on the outside of the reducing sleeve (3) with holding device (4).

2. a kind of knife bar of gear-hobbing machine as described in claim 1 and the link structure of tail end, which is characterized in that the reducing sleeve (3) it is connect by way of being arranged with the knife bar (1).

3. a kind of knife bar of gear-hobbing machine as claimed in claim 2 and the link structure of tail end, which is characterized in that the knife bar (1) end is provided with protrusion (2), and the reducing sleeve (3) is set in the protrusion (2) of the knife bar (1).

4. a kind of knife bar of gear-hobbing machine as described in claim 1 and the link structure of tail end, which is characterized in that the reducing sleeve It (3) is rotary table.

5. a kind of knife bar of gear-hobbing machine as claimed in claim 3 and the link structure of tail end, which is characterized in that the protrusion It (2) is cylinder.

6. a kind of knife bar of gear-hobbing machine as described in claim 1 and the link structure of tail end, which is characterized in that the reducing sleeve (3) inner hole is through-hole.

7. a kind of knife bar of gear-hobbing machine as described in claim 1 and the link structure of tail end, which is characterized in that the reducing sleeve (3) there is arc transition at both ends.