An anti-rotation mechanism for machining steering gear housing

Abstract

This utility model provides an anti-rotation mechanism for machining steering gear housings, relating to the field of steering gear housing machining technology. It includes: a jig ejector seat, an ejector shaft penetrating the inner side of the jig ejector seat, an internally threaded slot on the front end face of the jig ejector seat, a limit screw threaded through the inner side of the internally threaded slot, an anti-rotation groove on the axial surface of the ejector shaft, and a limit screw inserted into the anti-rotation groove. The front end of the limit screw is limited in the internally threaded slot by a flat head. This utility model solves the problem that during the machining of steering gear housing holes, the ejector shaft easily rotates under cutting torque, causing machining errors in the steering gear housing holes.

Description

Technical Field

[0001] This utility model relates to the field of steering gear housing processing technology, and specifically to an anti-rotation mechanism for steering gear housing processing. Background Technology

[0002] The steering gear housing is the "skeleton" of a car's steering system. Its main function is to house and protect the internal transmission mechanisms (such as gears, racks, and worm gears), while also providing mounting support and sealing. It directly determines steering accuracy and driving safety. With the development of new energy vehicles and intelligent driving, the requirements for steering gear housings are becoming increasingly stringent, and their machining accuracy directly affects steering performance (such as play and abnormal noise). When machining the circumferential holes in the steering gear housing, a common fixture positioning method is to use the center holes at both ends for axial positioning, fixing one end and tightening the other. The tightening end usually uses an ejector shaft in the inner hole of the ejector seat for tightening. However, during the machining of the steering gear housing holes, the ejector shaft is prone to rotation under cutting torque, leading to machining errors in the steering gear housing holes. Utility Model Content

[0003] To overcome the shortcomings of the existing technology, an anti-rotation mechanism for machining steering gear housing is provided to solve the problem that the ejector shaft is prone to rotation when subjected to cutting torque during the machining of steering gear housing holes, resulting in machining errors in the steering gear housing holes.

[0004] To achieve the above objectives, an anti-rotation mechanism for machining a steering gear housing is provided, comprising: a clamp ejector seat, wherein an ejector shaft extends through the inner side of the clamp ejector seat.

[0005] The front end face of the ejector seat of the clamp is provided with an internal threaded slot, and a limit screw is threaded through the inner side of the internal threaded slot. The axial surface of the ejector shaft is provided with an anti-rotation groove, and a limit screw is inserted into the anti-rotation groove. The front end of the limit screw is limited in the internal threaded slot by a flat head.

[0006] Furthermore, a positioning hole is provided on the inner side of the ejector seat of the clamp, and an ejector shaft is in contact with the positioning hole.

[0007] Furthermore, the internal threaded slot is located at the front end of the positioning hole; and the wall of the positioning hole is connected to the internal threaded slot.

[0008] Furthermore, the left side of the ejector shaft is tightly fitted against the steering gear housing via the pressing end.

[0009] Furthermore, the right end of the ejector shaft is connected to a hydraulic system via a piston rod.

[0010] Furthermore, a washer is fitted onto the surface of the limiting screw, and the flat head is in contact with the groove surface of the internal threaded hole through the washer.

[0011] Furthermore, the anti-rotation groove opening is shaped like a transition arc.

[0012] The beneficial effects of this utility model are that the anti-rotation mechanism for machining the steering gear housing utilizes the anti-rotation groove opened on the surface of the ejector shaft. The limiting screw, which is screwed into the slot hole of the ejector seat of the fixture, is inserted into the anti-rotation groove of the ejector shaft to form a mechanical constraint on the ejector shaft, thereby removing the circumferential degree of freedom of the ejector shaft. The structure is simple, the modification cost is low, and there is no energy consumption. It is easy to effectively limit the circumferential rotation of the ejector shaft when subjected to cutting torque, reduce the machining error of the steering gear housing, and improve the machining accuracy and efficiency of the steering gear housing. Attached Figure Description

[0013] Figure 1 This is a front view structural schematic diagram of the anti-rotation mechanism for processing the steering gear housing according to an embodiment of the present utility model.

[0014] Figure 2 This is a partial cross-sectional view of the anti-rotation mechanism for processing the steering gear housing according to an embodiment of the present invention.

[0015] Figure 3 This is a side cross-sectional view of the anti-rotation mechanism for processing the steering gear housing according to an embodiment of the present invention.

[0016] In the diagram: 1. Fixture ejector seat; 11. Positioning hole; 12. Internal threaded slot; 2. Ejector shaft; 21. Pressing end; 22. Anti-rotation groove; 3. Limit screw; 31. Flat head; 32. Washer; 4. Hydraulic system; 41. Piston rod. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Reference Figures 1 to 3 As shown, this utility model provides an anti-rotation mechanism for machining a steering gear housing, including: a clamp ejector seat 1, with an ejector shaft 2 penetrating through the inner side of the clamp ejector seat 1.

[0019] The front end face of the ejector seat 1 of the fixture is provided with an internal threaded slot 12, and a limit screw 3 is threaded through the inner side of the internal threaded slot 12. The shaft surface of the ejector shaft 2 is provided with an anti-rotation groove 22, and a limit screw 3 is inserted into the groove of the anti-rotation groove 22. The front end of the limit screw 3 is limited in the internal threaded slot 12 through the flat head 31.

[0020] First, one end of the steering gear housing to be machined is fixed by a fixing fixture, and the other end is pushed by a hydraulic mechanism 4 to push the ejector shaft 2 in the ejector seat 1 of the fixture to tighten. The anti-rotation groove 22 on the shaft surface of the ejector shaft 2 and the limit screw 3 form an anti-rotation mechanism, so that the limit screw 3 screwed into the ejector seat 1 of the fixture is inserted into the anti-rotation groove 22 of the ejector shaft 2, forming a mechanical constraint on the ejector shaft 2, removing the circumferential degree of freedom of the ejector shaft 2, which can effectively limit the circumferential rotation of the ejector shaft when subjected to cutting torque, reduce the machining error of the steering gear housing, and improve the machining accuracy and machining efficiency of the steering gear housing.

[0021] In this embodiment, a positioning hole 11 is provided on the inner side of the jig ejector seat 1, and an ejector shaft 2 is in contact with the positioning hole 11. The internal threaded slot 12 is located at the front end of the positioning hole 11; and the wall of the positioning hole 11 is connected to the internal threaded slot 12.

[0022] In a preferred embodiment, the positioning hole 11 facilitates the horizontal movement of the ejector shaft 2 within the ejector seat 1 of the fixture, allowing the moving ejector shaft 2 to press against one end of the steering gear housing. The internal threaded slot 12 (one or more internal threaded slots can be set according to actual needs) is used to connect the limiting screw 3, so that the limiting screw 3 is inserted into the anti-rotation groove 22 of the ejector shaft 2, thereby limiting the circumferential rotation of the ejector shaft 2 when subjected to cutting torque, thus preventing displacement of the steering gear housing. Furthermore, the mating surfaces of the limiting screw 3 and the anti-rotation groove 22 can be lubricated with grease to reduce friction and wear.

[0023] In this embodiment, the left side of the ejector shaft 2 is tightly fitted against the steering gear housing via the pressing end 21. The right end of the ejector shaft 2 is connected to the hydraulic system 4 via the piston rod 41.

[0024] As a preferred implementation, the hydraulic system 4 is used to provide axial clamping force to achieve the clamping operation on the steering gear housing. The hydraulic system 4 is a system that uses liquid (usually hydraulic oil) as the working medium and transmits pressure energy through closed pipelines to achieve power transmission or control. It mainly consists of accessories such as hydraulic pump (which converts mechanical energy into hydraulic energy), hydraulic cylinder (which converts hydraulic energy into mechanical energy), valves (which regulate pressure, flow and direction), oil tank, filter, cooler and hydraulic oil.

[0025] In this embodiment, a washer 32 is fitted onto the surface of the limiting screw 3, and the flat head 31 is in contact with the groove surface of the internal threaded slot 12 through the washer 32.

[0026] As a preferred embodiment, the washer 32 facilitates increasing the contact area between the flat head 31 and the internal threaded slot 12, distributing pressure, and preventing loosening. The limit screw 3 is made of high-strength alloy steel, and its strength and toughness can be balanced through heat treatment.

[0027] In this embodiment, the anti-rotation groove 22 has a transitional arc shape at the groove opening.

[0028] As a preferred embodiment, the anti-rotation groove 22 bears the rotational torque generated during the cutting of the steering gear housing. The groove material is selected as hardened steel with a hardness of HRC 58-62 and excellent wear resistance, which makes it easy for the anti-rotation groove 22 to work stably in the environment of cutting fluid and metal chips. In addition, the transition arc-shaped anti-rotation groove 22 helps to avoid stress concentration at the end of the groove.

[0029] This utility model's anti-rotation mechanism for steering gear housing machining effectively solves the problem that the ejector shaft easily rotates under cutting torque during steering gear housing hole machining, causing machining errors in the steering gear housing holes. It has a simple structure, low modification cost, and no energy consumption. It effectively limits the circumferential rotation of the ejector shaft under cutting torque, reduces the machining error of the steering gear housing, and improves the machining accuracy and efficiency of the steering gear housing. It is suitable for anti-rotation mechanisms used in steering gear housing machining.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An anti-rotation mechanism for machining a steering gear housing, comprising: The clamp ejector seat (1) has an ejector shaft (2) penetrating its inner side, characterized in that: The front end face of the ejector seat (1) of the clamp is provided with an internal threaded slot (12), and a limit screw (3) is threaded through the inner side of the internal threaded slot (12). The shaft surface of the ejector shaft (2) is provided with an anti-rotation groove (22), and a limit screw (3) is inserted into the groove of the anti-rotation groove (22). The front end of the limit screw (3) is limited in the internal threaded slot (12) through a flat head (31).

2. The anti-rotation mechanism for machining a steering gear housing according to claim 1, characterized in that, The clamp ejector seat (1) has a positioning hole (11) on its inner side, and the ejector shaft (2) is in contact with the positioning hole (11).

3. The anti-rotation mechanism for machining a steering gear housing according to claim 2, characterized in that, The internal threaded slot (12) is located at the front end of the positioning hole (11); and the wall of the positioning hole (11) is connected to the internal threaded slot (12).

4. The anti-rotation mechanism for machining a steering gear housing according to claim 1, characterized in that, The left side of the ejector shaft (2) is tightly fitted to the steering gear housing through the top pressing end (21).

5. The anti-rotation mechanism for machining a steering gear housing according to claim 4, characterized in that, The right end of the ejector shaft (2) is connected to a hydraulic system (4) via a piston rod (41).

6. The anti-rotation mechanism for machining a steering gear housing according to claim 1, characterized in that, The limiting screw (3) has a washer (32) fitted on its surface, and the flat head (31) is in contact with the groove surface of the internal threaded slot (12) through the washer (32).

7. The anti-rotation mechanism for machining a steering gear housing according to claim 1, characterized in that, The anti-rotation groove (22) has a transitional arc shape at the groove opening.

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