CN201089015Y - External bracket centre of gear hobbing machine - Google Patents

Abstract

The utility model discloses a centre of an outer support of a gear hobbing, which consists of the outer support and the centre arranged on the outer support; one side of the outer support is vertically provided with a support cylinder; a centre sleeve is embedded in the support cylinder from bottom to top; the centre is arranged in the centre sleeve and connected with the centre sleeve through a swing bearing and a tail bearing; a check ring is arranged on the upper end of a centre tail shaft. The utility model effectively solves the problems of low machining precision and efficiency of gears caused by long cantilever and large friction of the prior gear hobbing; the utility model has a simple structure, high precision and small friction, and is worthy to promote and use.

Description

Gear Hobbing Machine Outer Bracket Top

technical field

The utility model relates to a mechanical processing equipment, in particular to a tip of an outer bracket of a gear hobbing machine with low friction and high precision.

Background technique

As we all know, the traditional live top is generally installed with the top shell, and the front end of the top shell, the top shell and the top are installed with the top slewing bearing and the top bearing bearing, that is, the bearing is located in the top shell cavity, and the top cantilever longer. When in use, insert the live center into the taper reducing sleeve, and then install it into the end sleeve. The supporting bearing is located outside the end. Due to the limitation of the size of the end sleeve, the radial dimension of the journal where the center is inserted is small , so the rigidity of the tip shaft diameter is poor, easy to deform, and the bearing capacity is small during processing. It is easy for the workpiece to deviate from the axial centerline during processing, and it is difficult to meet the requirements of processing accuracy. Therefore, when the gear hobbing machine is used for gear hobbing, the fixed center is usually used, but the fixed center will not rotate, the friction force is large, and the cantilever of the center is also long.

Utility model content

In order to solve the problems in the prior art, the utility model provides a tip of an outer bracket of a gear hobbing machine with low friction and high precision.

The specific technical scheme adopted by the utility model to achieve the above technical purpose is: the top of the outer bracket of the gear hobbing machine is composed of the outer bracket and the top set on the outer bracket, one side of the outer bracket is vertically provided with a bracket tube, the top sleeve is from bottom The top is embedded in the bracket tube, the top is set in the top sleeve and connected with the top sleeve through the slewing bearing and the tail bearing, and the upper end of the top tail shaft is provided with a retaining ring. The tip is set in the tip sleeve, and the tip sleeve is embedded in the bracket tube. Only the tip part of the whole tip is exposed from the bracket tube. The tip has no cantilever, the radial load is large, and the tip rotates flexibly.

Preferably, the middle part of the top is the top center shaft, and the top center shaft is provided with an inner spacer, and the slewing bearings are arranged at both ends of the top center shaft, which are divided into upper slewing bearings and lower slewing bearings, and the upper end of the inner spacer is connected to the upper slewing Bearing, the lower end is connected with the lower slewing bearing. The inner spacer is used for positioning the upper and lower slewing bearings, and the upper and lower slewing bearings are used to ensure the flexibility of the top rotation.

Preferably, the lower end of the tip sleeve is provided with an outer ring, the upper end of the outer ring is connected to the lower end of the bracket tube, and the upper end of the tip sleeve is provided with an inner ring whose inner diameter matches the outer diameter of the tip and tail shaft.

Preferably, the diameter of the center shaft is smaller than that of the center shaft, a tail bearing is arranged on the center shaft, and the upper end surface of the tail bearing is connected with the lower end surface of the inner ring of the center sleeve. The setting of the tail bearing can ensure that the top can rotate flexibly when subjected to axial pressure.

Preferably, the lower end of the tip is provided with a raised edge, and the upper end of the raised edge is connected with the lower end of the lower slewing bearing. The function of the raised edge is to prevent the lower slewing bearing from sliding out of the top sleeve.

Preferably, the retaining ring is positioned above the top sleeve, and the lower end surface of the retaining ring is close to the upper end surface of the inner ring of the top sleeve. The function of the retaining ring is to prevent the tip from slipping out of the tip sleeve.

The beneficial effects of the utility model are: it effectively solves the problems of low gear processing precision and low efficiency of the current gear hobbing machine due to the long top cantilever and large friction force. The utility model has simple structure, high precision and small friction force. It is worth promoting and using.

Description of drawings

Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is described further.

Accompanying drawing 1 is a kind of structural sectional view of the tip of the outer bracket of the gear hobbing machine of the present invention.

Accompanying drawing 2 is a kind of structural cross-sectional view of the top comparison technology of the outer bracket of the gear hobbing machine of the present invention.

Detailed ways

Example 1

In embodiment 1 shown in Figure 1, the top of the outer bracket of the gear hobbing machine is composed of an outer bracket and a top set on the outer bracket. One side of the outer bracket 1 is vertically provided with a bracket tube 5, and the top sleeve 6 is from bottom to top. Embedded in the support tube 5, the lower end of the top sleeve 6 is provided with an outer ring 14, the upper end surface of the outer ring 14 is connected with the lower end surface of the bracket tube 5, and the upper end of the top sleeve 6 is provided with an inner ring 12, and the inner diameter of the inner ring 12 is the same as The outer diameter of the top tail shaft 11 is suitable. The top 2 is arranged in the top sleeve 6 and connected with the top sleeve 6 through the slewing bearing and the tail bearing 9. The middle part of the top 2 is the top center shaft 13, and the top center shaft 13 is provided with an inner spacer 7, and the slewing bearing is arranged on The two ends of the top center shaft 13 are divided into an upper slewing bearing 8 and a lower slewing bearing 4 , the upper end of the inner spacer 7 is connected to the upper slewing bearing 8 , and the lower end is connected to the lower slewing bearing 4 .

The upper end of the top tail shaft 11 is provided with a retaining ring 10, the position of the retaining ring 10 is above the top sleeve 6, and the lower end surface of the retaining ring 10 is close to the upper end surface of the inner ring 12 of the top sleeve 6. The diameter of the top tail shaft 11 is smaller than the top middle shaft 13, and the tail bearing 9 is arranged on the top tail shaft 11, and the upper end surface of the tail bearing 9 is connected with the lower end surface of the inner ring 12 of the top sleeve 6. The lower end of the tip 2 is provided with a convex edge 3, and the upper end of the convex edge 3 is connected with the lower end of the lower slewing bearing 4.

Claims (6)

1. A top of the outer bracket of a gear hobbing machine, which is composed of an outer bracket and a top located on the outer bracket, and is characterized in that: one side of the outer bracket (1) is vertically provided with a bracket tube (5), and the top sleeve (6) automatically Embedded in the bracket tube (5) from bottom to top, the top (2) is set in the top sleeve (6) and connected with the top sleeve (6) through the slewing bearing and tail bearing (9), the top and tail shaft (11) The upper end is provided with a retaining ring (10). 2. The top of the outer bracket of the gear hobbing machine according to claim 1, characterized in that the middle part of the top (2) is a top center shaft (13), and the top center shaft (13) is provided with an inner spacer (7), so The above-mentioned slewing bearings are arranged at both ends of the top center shaft (13), and are divided into an upper slewing bearing (8) and a lower slewing bearing (4). The upper end of the inner spacer (7) is connected to the upper slewing bearing (8), and the lower end is connected to Lower swing bearing (4). 3. The tip of the outer bracket of the gear hobbing machine according to claim 1, characterized in that the lower end of the tip sleeve (6) is provided with an outer ring (14), and the upper end surface of the outer ring (14) is in contact with the bracket tube (5) The lower end faces are connected, and the top sleeve (6) upper end is provided with an inner ring (12), and the inner diameter of the inner ring (12) is adapted to the outer diameter of the top tail shaft (11). 4. The top of the outer bracket of the gear hobbing machine according to claim 1, characterized in that the diameter of the top and tail shaft (11) is smaller than the top middle shaft (13), and the tail bearing (9) is arranged on the top and tail shaft (11), The upper end surface of the tail bearing (9) is connected with the lower end surface of the inner ring (12) of the top sleeve (6). 5. The tip of the outer bracket of the gear hobbing machine according to claim 1, characterized in that the lower end of the tip (2) is provided with a convex edge (3), and the upper end of the convex edge (3) is connected with the lower end of the lower slewing bearing (4) . 6. The top of the outer bracket of the gear hobbing machine according to claim 1, characterized in that the position of the retaining ring (10) is above the top sleeve (6), and the lower end surface of the retaining ring (10) is close to the top sleeve (6) ) the upper end face of the inner ring (12).

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