Improved clamp for machining and positioning center hole of steering gear shell

Abstract

The utility model relates to the technical field of steering gear shell processing, and discloses an improved fixture for processing and positioning a central hole of a steering gear shell, which comprises a positioning auxiliary fixture, a positioning auxiliary fixture, a clamping device, a clamping device and a clamping device, and is characterized in that the positioning auxiliary fixture comprises a three-jaw positioning support part, an auxiliary support sleeve, a base and a spring; through cooperation of the three-jaw positioning supporting piece, the base, the auxiliary supporting sleeve, the spring and the positioning bolt, the whole positioning auxiliary clamp can be conveniently installed on a machine tool to serve as a positioning mechanism, and when the steering gear shell is machined, the inner wall of the three-jaw positioning supporting piece is pushed through the spring to clamp the outer circle of a center hole of the steering gear shell. Therefore, the precision and stability of the positioning reference of the center hole in the machining process of the steering gear shell are guaranteed, the machining quality defects of hole deviation and uneven wall thickness caused by deviation of the positioning hole due to the fact that flashes exist in the steering gear shell blank are overcome, the machining quality is improved, and the scrapping and reworking cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a steering gear housing machining technical field, concretely is an improved fixture for steering gear housing machining center hole machining positioning. BACKGROUND

[0002] The automobile steering system is a very important system in the automobile system, and the steering gear housing is an important part in the automobile steering system. The steering gear housing is used for protecting the motor, chip and steering structure of the steering system in the steering system, and the assembly requirement is high. Therefore, the steering gear housing machining has high precision requirement, especially the positioning requirement of the center hole, so as to realize high assembly requirement.

[0003] The traditional center hole positioning in the steering gear housing machining process adopts positioning pin insertion into the inner wall of the center hole to realize positioning, and the positioning effect is poor. When the blank has defects such as flash, the positioning is easy to deviate, and then the steering gear hole deviation and uneven wall thickness problems are caused, which seriously affect the assembly, cause the parts to be reworked or scrapped, increase the enterprise cost, and therefore we need to put forward an improved fixture for steering gear housing machining center hole machining positioning. UTILITY MODEL CONTENT

[0004] The utility model discloses a kind of improved fixtures for steering gear housing machining center hole machining positioning, improve the positioning efficiency of steering gear housing, improve the stability of steering gear housing positioning, to eliminate the positioning hole deviation of steering gear blank existence influence, guarantee the thickness uniformity of processing hole wall, improve the processing quality, to solve the problems raised in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical scheme: an improved fixture for steering gear housing machining center hole machining positioning, comprising:

[0006] Positioning auxiliary fixture, the positioning auxiliary fixture includes three-jaw positioning support, auxiliary support sleeve, base and spring, the three-jaw positioning support can be detachably installed at the upper end of auxiliary support sleeve, the bottom hole for installing auxiliary support sleeve is set on the upper surface of base, and the cylindrical groove for installing spring is set at the lower end of auxiliary support sleeve;

[0007] Steering gear housing body, the steering gear housing body is provided with steering gear housing center hole outer circle, the steering gear housing center hole outer circle is provided with steering gear center hole, and the steering gear housing center hole outer circle is matched with three-jaw positioning support.

[0008] Preferably, a plurality of threaded holes are formed in the three-jaw positioning support, and a plurality of positioning bolts are arranged in the plurality of threaded holes and are threadedly connected with the auxiliary support sleeve, and the plurality of positioning bolts are arranged at equal angles.

[0009] Preferably, the three sets of claw clamps of the three-claw positioning support are arranged at equal angles, and the opposite sides of the three sets of claw clamps are in abutment with the outer circle of the center hole of the steering gear housing.

[0010] Preferably, one side of the base is provided with a mounting hole, and a limiting pin is arranged in the mounting hole; and the outer side of the auxiliary support sleeve is provided with a limiting key groove in which the limiting pin is slidably arranged.

[0011] Preferably, the length of the spring in the semi-compressed state is greater than the depth of the cylindrical groove, and a plurality of positioning holes are arranged on the upper surface of the base.

[0012] Preferably, the auxiliary support sleeve is arranged in a T-shaped cross section, the bottom hole on the base is arranged in a stepped shape, and the auxiliary support sleeve is slidably arranged in the bottom hole.

[0013] Preferably, the inner wall of the claw clamp of the three-claw positioning support is arranged in an arc shape, and the axis of the center hole of the steering gear and the axis of the auxiliary support sleeve are arranged on the same straight line.

[0014] Compared with the prior art, the utility model has the advantages that:

[0015] The utility model mainly through the cooperation between three-claw positioning support, base, auxiliary support sleeve, spring and positioning bolt, positioning auxiliary clamp whole is convenient for installation on lathe as positioning mechanism, when processing steering gear housing, through spring promotes the inner wall of three-claw positioning support and clamps the outer circle of steering gear housing center hole, thereby guarantee the precision and stability of steering gear housing machining process center hole positioning datum, eliminate the positioning hole deviation caused by the flash of steering gear housing blank, and further cause the machining quality defect of hole deviation and uneven wall thickness, improve the machining quality, reduce the scrap and rework cost. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is base structure schematic view of the utility model;

[0017] Figure 2 It is three-claw positioning support structure schematic view of the utility model;

[0018] Figure 3 It is steering gear housing body structure schematic view of the utility model;

[0019] Figure 4 It is auxiliary support sleeve cross section structure schematic view of the utility model.

[0020] In the figure: 1, three claw positioning support; 2, positioning bolt; 3, auxiliary support sleeve; 4, cylindrical groove; 5, limit keyway; 6, spring; 7, steering gear housing center hole outer circle; 8, base; 9, steering gear center hole; 10, steering gear housing body. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0022] Please refer to Figures 1-4 The utility model provides a kind of technical scheme: an improved fixture for steering gear housing machining center hole machining positioning, comprising:

[0023] Positioning auxiliary fixture, positioning auxiliary fixture includes three claw positioning support 1, auxiliary support sleeve 3, base 8 and spring 6, three claw positioning support 1 can be detachably installed in the upper end of auxiliary support sleeve 3, bottom hole is set in the upper surface of base 8 for the installation of auxiliary support sleeve 3, and cylindrical groove 4 is set in the lower end of auxiliary support sleeve 3 for the installation of spring 6;

[0024] Steering gear housing body 10 is provided with steering gear housing center hole outer circle 7, steering gear housing center hole outer circle 7 is provided with steering gear center hole 9, and steering gear housing center hole outer circle 7 is matched with three claw positioning support 1.

[0025] A plurality of threaded holes are formed in three claw positioning support 1, and positioning bolt 2 for threadedly connecting with auxiliary support sleeve 3 is arranged in the plurality of threaded holes, and the plurality of positioning bolts 2 are arranged at equal angles, so that three claw positioning support 1 can be quickly installed on auxiliary support sleeve 3 through the threaded holes and positioning bolt 2, the dismounting efficiency of three claw positioning support 1 is improved, and the replacement and maintenance of three claw positioning support 1 are facilitated.

[0026] Three sets of claw clamps of three claw positioning support 1 are arranged at equal angles, and the opposite sides of the three sets of claw clamps are in abutment with steering gear housing center hole outer circle 7, so that the positioning stability of three claw positioning support 1 to steering gear housing center outer circle is improved by the equal-angle arrangement of the claw clamps of three claw positioning support 1, and the clamping force is uniformly distributed.

[0027] The base 8 is provided with a mounting hole on one side, and a limiting pin is arranged in the mounting hole, and the outer side of the auxiliary supporting sleeve 3 is provided with a limiting key groove 5 for slidingly arranging the limiting pin, and the travel of the auxiliary supporting sleeve 3 is limited through the limiting key groove 5, so that the auxiliary supporting sleeve 3 is prevented from being separated from the base 8, and the service life is improved.

[0028] The length of the spring 6 in the half-compressed state is greater than the depth of the cylindrical groove 4, a plurality of positioning holes are arranged on the upper surface of the base 8, the three-jaw positioning support 1 is pushed by the spring 6 to clamp the outer circle 7 of the center hole of the steering gear housing, and the positioning of the center hole 9 of the steering gear is realized.

[0029] The cross section of the auxiliary supporting sleeve 3 is arranged in a T shape, the bottom hole on the base 8 is arranged in a stepped shape, the auxiliary supporting sleeve 3 is slidingly arranged in the bottom hole, the auxiliary supporting sleeve 3 is slidingly arranged in the bottom hole on the base 8, cooperates with the limiting key groove 5, and the stability of the auxiliary supporting sleeve 3 is improved.

[0030] The inner wall of the claw clamp of the three-jaw positioning support 1 is arranged in an arc shape, the axis of the center hole 9 of the steering gear and the axis of the auxiliary supporting sleeve 3 are arranged on the same straight line, the claw clamp is better combined with the outer circle 7 of the center hole of the steering gear housing through the structural arrangement of the claw clamp of the three-jaw positioning support 1, and the stability of clamping is improved.

[0031] In use, the base 8 is fixed on the auxiliary clamp of the machine tool, the outer circle 7 of the center hole of the steering gear housing of the steering gear housing body 10 to be machined is abutted against the inner wall of the claw clamp of the three-jaw positioning support 1, the claw clamp of the three-jaw positioning support 1 is clamped to the outer circle 7 of the center hole of the steering gear housing through pressure, and the three-jaw positioning support 1 is compressed in the spring 6 in the cylindrical groove 4 at the same time of being compressed, and the limiting key groove 5 limits the descending travel of the auxiliary support, so that the clamped steering gear housing body 10 is reset under the action of the spring 6, the positioning of the center hole 9 of the steering gear is realized, the deviation of the positioning hole caused by the flash of the steering gear housing blank is eliminated, the high-precision and high-stability center hole positioning is realized, and the machining quality is improved.

[0032] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. An improved fixture for steering gear housing machining center hole machining positioning, characterized in that, The utility model relates to a positioning auxiliary fixture, including three claw positioning supports (1), auxiliary support sleeve (3), base (8) and spring (6), three claw positioning supports (1) can be detachably installed at the upper end of auxiliary support sleeve (3), the upper surface of base (8) is provided with bottom hole for the installation of auxiliary support sleeve (3), and the lower end of auxiliary support sleeve (3) is provided with cylindrical groove (4) for the installation of spring (6); The steering gear housing body (10) is provided with a steering gear housing center hole outer circle (7), the steering gear housing center hole outer circle (7) is provided with a steering gear center hole (9), and the steering gear housing center hole outer circle (7) is matched with the three claw positioning support (1). A plurality of threaded holes are formed in the three claw positioning support (1), and a positioning bolt (2) is arranged in each threaded hole and is screwed with the auxiliary support sleeve (3).

2. An improved fixture for machining center hole of a steering housing according to claim 1, wherein: The three sets of claw clamps of the three claw positioning support (1) are arranged at equal angles, and the opposite sides of the three sets of claw clamps are in contact with the steering gear housing center hole outer circle (7).

3. An improved fixture for center hole machining positioning of a diverter housing according to claim 2, wherein: The base (8) is provided with a mounting hole on one side, and a limiting pin is arranged in the mounting hole.

4. An improved fixture for machining center hole of a steering housing according to claim 3, wherein: The length of the spring (6) in the half-compressed state is greater than the depth of the cylindrical groove (4), and a plurality of positioning holes are formed in the upper surface of the base (8).

5. An improved fixture for center hole machining positioning of a diverter housing according to claim 4, wherein: The cross section of the auxiliary support sleeve (3) is T-shaped, the bottom hole of the base (8) is step-shaped, and the auxiliary support sleeve (3) is slidingly arranged in the bottom hole.

6. An improved fixture for center hole machining positioning of a diverter housing according to claim 5, wherein: The inner wall of the claw clamp of the three claw positioning support (1) is arc-shaped, and the axis of the steering gear center hole (9) and the axis of the auxiliary support sleeve (3) are arranged on the same straight line.

7. An improved fixture for center hole machining positioning of a diverter housing according to claim 6, wherein: ​

Images