Gear ring support hobbing tool

Abstract

The utility model discloses a gear ring support hobbing tool which comprises a positioning assembly used for achieving positioning of a gear ring support and a pressing plate used for achieving fixing of the gear ring support, the positioning assembly comprises a positioning seat and a positioning shaft, and a mounting hole allowing the small end of the gear ring support to be inserted and mounted is formed in the positioning seat. The diameter of the mounting hole is larger than the maximum outer diameter of the small end of the gear ring support, the positioning shaft is arranged in the middle of the mounting hole and can be penetrated by an inner hole of the gear ring support, the pressing plate is arranged on the positioning shaft through a mounting structure, and the outer diameter of the upper end of the positioning seat and the outer diameter of the pressing plate are both smaller than the diameter of a root circle of a large-diameter outer tooth to be machined. In the fixing process, the small end of the gear ring support is inserted into the positioning hole downwards, the gear ring support is supported by the top face of the positioning base and the positioning shaft at the same time, then the gear ring support is pressed through the pressing plate, positioning and supporting of the gear ring support are achieved, the overall fixing mode is simple, and the stability of the gear ring support in the machining process can be effectively guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile parts processing, and in particular relates to a gear hobbing tool for a gear ring bracket. Background Art

[0002] like Figure 1 As shown, the gear ring bracket used as an automobile accessory has two different external teeth spaced apart on the upper and lower outer diameters. During processing, the external teeth with a small diameter at the upper end are usually processed first, and then the external teeth with a large diameter at the lower end are processed. When processing the external teeth with a small diameter, positioning and fixing are usually achieved through the outer side of the lower end. However, when processing the external teeth with a large diameter at the lower end, since the external teeth with a small diameter at the upper end have been processed, fixing and positioning during processing cannot be achieved through the outer side of the upper end. Utility Model Content

[0003] The utility model intends to provide a gear ring bracket gear hobbing tool, which can be used as a positioning and fixing tool when the gear ring bracket first processes small-diameter external teeth and then performs gear hobbing on large-diameter external teeth.

[0004] To this end, the technical solution adopted by the utility model is: a gear ring bracket hobbing tool, including a positioning assembly for realizing the positioning of the gear ring bracket and a pressure plate for realizing the fixation of the gear ring bracket, the positioning assembly includes a positioning seat and a positioning shaft, the positioning seat is provided with a mounting hole for the small end of the gear ring bracket to be inserted and installed, and the diameter of the mounting hole is larger than the maximum outer diameter of the small end of the gear ring bracket, the positioning shaft is arranged in the middle of the mounting hole and can be passed through the inner hole of the gear ring bracket, the pressure plate is arranged on the positioning shaft through the mounting structure, and the outer diameter of the upper end of the positioning seat and the outer diameter of the pressure plate are both smaller than the root circle diameter of the large-diameter external tooth to be processed.

[0005] As a preferred embodiment of the above scheme, the mounting structure includes a threaded section arranged at the upper end of the positioning shaft and having an outer diameter smaller than the middle part of the positioning shaft, the pressure plate is sleeved outside the threaded section, and the threaded section is equipped with a clamping nut that can clamp the pressure plate.

[0006] Further preferably, the pressing plate is provided with an open groove connected to the center of the pressing plate, and the width of the open groove is not less than the major diameter of the threaded segment.

[0007] Further preferably, the positioning seat includes an upper positioning plate and a lower positioning plate spaced apart from each other, and a plurality of support columns are evenly arranged circumferentially between the upper positioning plate and the lower positioning plate. When the ring gear bracket is installed, the small end of the ring gear bracket does not contact the lower positioning plate.

[0008] Further preferably, the support column is provided with mounting holes for bolts to pass through from top to bottom, the upper positioning plate is provided with mounting countersunk holes for bolts to pass through corresponding to each support column, and the upper end of the lower positioning plate is provided with a first bolt hole for tightening the bolt.

[0009] Further preferably, the lower end of the positioning shaft is provided with a fixed step for installing the lower positioning plate and located below the lower positioning plate, the fixed step is provided with a bolt through hole for the bolt to pass through, and the lower positioning plate is provided with a second bolt hole for tightening the bolt for the bolt through hole; the lower end of the positioning shaft is provided with an installation section located below the fixed step and capable of being inserted into the gear hobbing machine for installation.

[0010] Further preferably, a positioning sleeve for supporting the ring gear bracket from the inside is provided between the positioning shaft and the ring gear bracket, a positioning step for installing the positioning sleeve is provided on the positioning shaft, and a pin hole for fixing the positioning sleeve on the positioning shaft is provided on the positioning sleeve.

[0011] Further preferably, the positioning sleeve is arranged in a stepped shape with a smaller upper portion and a larger lower portion, and the pin hole is arranged at the upper end.

[0012] The beneficial effects of the utility model are as follows: when fixing, the small end of the ring gear bracket is inserted downward into the positioning hole, so that the ring gear bracket is supported by the top surface of the positioning seat and the positioning shaft at the same time, and then the ring gear bracket is pressed by the pressure plate, thereby realizing the positioning support of the ring gear bracket. The overall fixing method is simple and can effectively ensure the stability of the ring gear bracket during processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Schematic diagram of the ring gear bracket.

[0014] Figure 2 It is a schematic diagram of the utility model.

[0015] Figure 3 It is a cross-sectional view of the utility model.

[0016] Figure 4 It is a schematic diagram of the positioning seat in the utility model.

[0017] Figure 5 It is a schematic diagram of the positioning shaft in the utility model.

[0018] Figure 6 It is a schematic diagram of the positioning sleeve in the utility model.

[0019] Figure 7 for Figure 2 Schematic diagram after installing the ring gear bracket.

[0020] Figure 8 for Figure 3 Schematic diagram after installing the ring gear bracket.

[0021] Figure markings: pressure plate-1, opening groove-1a, positioning seat-2, mounting hole-2a, positioning shaft-3, threaded section-3a, fixing step-3b, bolt through hole-3c, mounting section-3d, positioning step-3e, gear ring bracket-4, positioning plate-5, mounting countersunk hole-5a, support column-6, mounting hole-6a, first bolt hole-6b, positioning sleeve-7, pin hole-7a, lower positioning plate-8, second bolt hole-8a, first bolt hole-8b. DETAILED DESCRIPTION

[0022] The present invention will be further described below by way of embodiments and in conjunction with the accompanying drawings:

[0023] like Figure 2-Figure 8 As shown, a gear ring bracket gear hobbing tool is mainly composed of a pressure plate 1 and a positioning assembly. The positioning assembly is used to realize the positioning of the gear ring bracket 4, the pressure plate 1 is used to realize the fixing of the gear ring bracket 4, and the pressure plate is arranged on the positioning seat through the mounting structure.

[0024] The specific structure of the positioning assembly includes a positioning seat 2 and a positioning shaft 3. A mounting hole 2a is provided in the positioning seat 2 for the small end of the ring gear bracket 4 to be inserted and installed, and the diameter of the mounting hole 2a is larger than the maximum outer diameter of the small end of the ring gear bracket 4. The positioning shaft 3 is arranged in the middle of the mounting hole 2a and can be passed through the inner hole of the ring gear bracket 4. Specifically, the pressure plate 1 is arranged on the positioning shaft 3 through the mounting structure and can be pressed on the ring gear bracket placed in the mounting hole. In order to ensure that the large end of the ring gear bracket can be smoothly hobbed, the outer diameter of the upper end of the positioning seat 2 and the outer diameter of the pressure plate 1 are both smaller than the root circle diameter of the large diameter external teeth to be processed. For the convenience of placing the ring gear bracket, the upper end of the mounting hole is provided with a chamfer of a relatively large depth.

[0025] The specific structure of the mounting structure includes a threaded section 3a which is arranged at the upper end of the positioning shaft 3 and has an outer diameter smaller than the middle part of the positioning shaft 3, and the pressing plate 1 is sleeved outside the threaded section 3a, and a clamping nut which can clamp the pressing plate 1 is provided on the threaded section 3a. In order to facilitate the removal and insertion of the pressing plate, an open groove 1a which is connected to the center of the pressing plate 1 is provided on the pressing plate 1, and the width of the open groove 1a is not less than the major diameter of the threaded section 3a.

[0026] In order to lighten the structure of the positioning seat and facilitate processing, the positioning seat 2 includes an upper positioning plate 5 and a lower positioning plate 8 spaced apart from each other, and a plurality of support columns 6 are evenly arranged circumferentially between the upper positioning plate 5 and the lower positioning plate 8. When the ring gear bracket 4 is installed, the small end of the ring gear bracket 4 does not contact the lower positioning plate 8.

[0027] To facilitate the installation of the support column, installation holes 6a for bolts to pass through are set through the upper and lower parts of the support column 6, and installation countersunk holes 5a for bolts to pass through are set on the upper positioning plate 5 corresponding to each support column 6. At the same time, a first bolt hole 8b for tightening the bolt is set at the upper end of the lower positioning plate 8. By changing the height of the support column, it can be suitable for gear ring brackets of different heights.

[0028] In order to realize the installation between the positioning shaft and the positioning seat, a fixing step 3b for installing the lower positioning plate and located below the lower positioning plate is provided at the lower end of the positioning shaft 3, and a bolt through hole 3c for the bolt to pass through is provided on the fixing step 3b, and a second bolt hole 8a for tightening the bolt is provided on the lower positioning plate for the bolt through hole 3c. In order to facilitate the installation of the entire tooling, an installation section 3d is provided at the lower end of the positioning shaft 3, which is located below the fixing step 3b and can be inserted into the gear hobbing machine for installation.

[0029] In order to facilitate the support of the ring gear bracket from the inside, a positioning sleeve 7 for supporting the ring gear bracket 4 from the inside is provided between the positioning shaft 3 and the ring gear bracket 4. In order to facilitate the installation between the positioning sleeve and the positioning shaft, a positioning step 3e is provided on the positioning shaft 3 for the installation of the positioning sleeve 7, and a pin hole 7a for fixing on the positioning shaft is provided on the positioning sleeve 7. In order to prevent the fixing pin inserted in the pin hole from causing damage to the appearance of the ring gear bracket, the positioning sleeve 7 is set in a stepped shape with a small top and a large bottom, and the pin hole 7a is set at the upper end. Of course, the pin hole can also be set as a screw hole.

Claims

1. A gear hobbing tool for a gear ring bracket, characterized in that: The invention comprises a positioning assembly for realizing the positioning of a ring gear bracket (4) and a pressure plate (1) for realizing the fixing of the ring gear bracket (4), wherein the positioning assembly comprises a positioning seat (2) and a positioning shaft (3), wherein a mounting hole (2a) is provided in the positioning seat (2) for inserting and installing the small end of the ring gear bracket (4), and the diameter of the mounting hole (2a) is larger than the maximum outer diameter of the small end of the ring gear bracket (4), wherein the positioning shaft (3) is arranged in the middle of the mounting hole (2a) and can be passed through the inner hole of the ring gear bracket (4), wherein the pressure plate (1) is arranged on the positioning shaft (3) through a mounting structure, and the outer diameter of the upper end of the positioning seat (2) and the outer diameter of the pressure plate (1) are both smaller than the root circle diameter of the large-diameter external tooth to be processed.

2. The gear hobbing tool for the gear ring bracket according to claim 1, characterized in that: The mounting structure comprises a threaded section (3a) arranged at the upper end of the positioning shaft (3) and having an outer diameter smaller than the middle part of the positioning shaft (3); the pressing plate (1) is sleeved outside the threaded section (3a); and the threaded section (3a) is provided with a clamping nut capable of clamping the clamping plate (1).

3. The gear ring bracket gear hobbing tool according to claim 2, characterized in that: The pressing plate (1) is provided with an open groove (1a) which is connected to the center of the pressing plate (1), and the width of the open groove (1a) is not less than the major diameter of the threaded section (3a).

4. The gear ring bracket gear hobbing tool according to claim 1, characterized in that: The positioning seat (2) comprises an upper positioning plate (5) and a lower positioning plate (8) which are spaced apart from each other, and a plurality of support columns (6) are evenly arranged circumferentially between the upper positioning plate (5) and the lower positioning plate (8); when the ring gear bracket (4) is installed, the small end of the ring gear bracket (4) does not contact the lower positioning plate (8).

5. The gear hobbing tool for the gear ring bracket according to claim 4, characterized in that: The support column (6) is provided with mounting holes (6a) for bolts to pass through from top to bottom, and each support column (6) on the upper positioning plate (5) is provided with a mounting countersunk hole (5a) for bolts to pass through, and the upper end of the lower positioning plate (8) is provided with a first bolt hole (8b) for bolts to be tightened.

6. The gear hobbing tool for the gear ring bracket according to claim 4, characterized in that: The lower end of the positioning shaft (3) is provided with a fixing step (3b) for installing the lower positioning plate (8) and located below the lower positioning plate (8); the fixing step (3b) is provided with a bolt through hole (3c) for the bolt to pass through; the lower positioning plate (8) is provided with a second bolt hole (8a) for tightening the bolt corresponding to the bolt through hole (3c); the lower end of the positioning shaft (3) is provided with an installation section (3d) located below the fixing step (3b) and capable of being inserted into a gear hobbing machine for installation.

7. The gear ring bracket gear hobbing tool according to claim 1, characterized in that: A positioning sleeve (7) for supporting the ring gear bracket (4) from the inside is provided between the positioning shaft (3) and the ring gear bracket (4); a positioning step (3e) for installing the positioning sleeve (7) is provided on the positioning shaft (3); and a pin hole (7a) for fixing the positioning sleeve (7) on the positioning shaft is provided on the positioning sleeve (7).

8. The gear hobbing tool for the gear ring bracket according to claim 7, characterized in that: The positioning sleeve (7) is arranged in a stepped shape with a smaller top and a larger bottom, and the pin hole (7a) is arranged at the upper end.

Images