Device for modifying outer diameter of steering column

Abstract

The utility model discloses a device for shaping the outer diameter of a steering column, which comprises a base, a press-fitting shaping device body and a sensor fixing plate, the press-fitting shaping device body and the sensor fixing plate are arranged in the base, and the press-fitting shaping device body comprises a shaping group and a guide device; the shaping group comprises a shaping knife edge and a gland for fixing the shaping knife edge on the base; the guide device comprises a transition push block and a fixed rod which play a main guide role, and a spring for resetting; a servo above a base is controlled to push the base to move downwards in the direction of a fixing rod by receiving a driving signal, when a tubular column bearing is pressed, a transition push block compresses a spring, and a shaping knife edge makes contact with the outer diameter of a tubular column to start shaping; when the sensor controls the servo to retreat, the spring overcomes the dead weight of the pipe column, the part is separated from the device, and the shaping function during press fitting is achieved. According to the automatic press-fitting and shaping device, automatic press-fitting and shaping are integrated, the operation steps of workers are greatly reduced, the production efficiency is improved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to a shaping device, specifically a device for shaping the outer diameter of a column in an automotive EPS, belonging to the technical field of automotive parts processing. Background Art

[0002] According to the applicant's understanding, in the prior art, after the vehicle EPS column is press-fitted, there is a certain deformation, and the deformed part is the external interface dimension, with high dimensional accuracy requirements. Therefore, manual single-piece shaping is required. The process of this manual operation is to place a single-piece column on the positioned tooling and use a manual profiling tooling for shaping. The work intensity of employees is high, the efficiency is low, and the guarantee ability is poor, resulting in high labor costs for the enterprise and a large number of unqualified products at the same time. Summary of the Utility Model

[0003] The purpose of the utility model is to propose a device for shaping the outer diameter of a steering column, which can cooperate with a column press-fitting device and realize the function of automatically shaping the outer diameter of the column under the same positioning condition, aiming at the problems existing in the above-mentioned prior art.

[0004] To achieve the above purpose, the specific technical solution of the utility model is as follows: A device for shaping the outer diameter of a steering column includes a base and a sensor fixing plate. The appearance of the base is in the shape of a stepped shaft, and a milling plane is provided on the outer circle of its large end for installing the sensor fixing plate; A press-fitting and shaping device body for shaping the outer diameter of the column is installed in the base, and the press-fitting and shaping device body includes a shaping group and a guiding mechanism; The shaping group is fixedly installed on the lower end surface of the base through fasteners; The guiding mechanism is installed inside the base in the form of a bolt and nut structure and coaxially; The sensor fixing plate is fixed to the milling plane of the base through bolts, and a pressure sensor for detecting the force during the press-fitting and shaping process is installed on its upper surface.

[0005] Further, the shaping group consists of a shaping blade and a gland; The shaping blade is placed along the annular groove opened at the lower end inside the base, and the gland is located at the bottom of the base. The gland is fixedly connected to the base by symmetrically arranged bolts passing through the mounting holes on the gland, and at the same time covers and contacts the bottom surface of the base and the shaping blade, so that the shaping blade is fixed inside the base. The thickness of the shaping blade is the same as the depth of the annular groove, and its inner hole is in the shape of a frustum of a cone, with the diameter of the upper circular hole smaller than that of the lower circular hole.

[0006] Further, the guiding mechanism consists of a fixed rod, a transition push block and a spring; The fixed rod is vertically inserted into the mating hole opened at the center of the base, and a threaded hole is processed at its bottom for installing the transition push block;

[0007] The outer shape of the transition push block is cylindrical, with a round hole at the lower end, making it in a sleeve shape as the contact press-fitting surface. A second annular groove for placing a spring is provided at the upper end with the axis as the center, and the outer wall and inner wall of the second annular groove respectively correspond to the outer diameter and inner diameter dimensions of the spring. A through hole is machined along the center of the transition push block; when the guiding mechanism is installed in the base, the upper and lower end faces of the spring are respectively in contact with the inner wall of the base and the inside of the transition push block.

[0008] Furthermore, the outer shape of the fixing rod is bolt-shaped, consisting of a rod body and a rod head. The rod body is inserted into the mating hole of the base, so that all components in the guiding mechanism are coaxially arranged with the base; a threaded hole is provided at the bottom of the rod body. After the fastener passes through the through hole on the transition push block, it is tightened and fixed with the threaded hole.

[0009] The rod head is in contact with the top end face of the base, so that the spring is pre-compressed and fixed inside the base under the limitation of the length of the fixing rod, the head of the fixing rod, and the tightened bolt.

[0010] Furthermore, the sensor fixing plate is formed into an L-shaped structure by bending a polygonal plate by 90 degrees. Its vertical section is fixed to the milled plane of the base by bolts, and its width is equal to the width of the milled plane. A number of through holes for installing pressure sensors for detecting the force during the press-fitting and finishing process are provided on the horizontal section.

[0011] The outstanding progress of the present utility model compared with the prior art is as follows: The present utility model adopts a coaxially integrated shaping group and guiding device. Under the same positioning state, the outer diameter of the pipe column can be accurately shaped, replacing the instability caused by the original manual operation, providing guarantee for the process control in the production site, greatly reducing the appearance of defective products on the production line, and improving the production efficiency.

[0012] The present utility model has a reasonable layout and low manufacturing cost, is suitable for mass production, and can meet the market demand for carrying out this work. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present utility model will be further described below with reference to the drawings.

[0014] Figure 1 is a schematic structural diagram of the present utility model.

[0015] Figure 2 is Figure 1 a cross-sectional view of

[0016] BRIEF DESCRIPTION OF THE DRAWINGS: 1 - Sensor fixing plate, 2 - Base, 3 - Fixing rod, 4 - Spring, 5 - Transition push block, 6 - Shaping blade, 7 - Pressure cover. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] A device for shaping the outer diameter of a steering column provided in this embodiment has a structure as Figure 1As shown, it includes a sensor fixing plate 1, a base 2, and a press fitting and shaping device body installed inside the base.

[0018] Among them, the sensor fixing plate is a polygonal plate with a 90° bend. The base is in the shape of a stepped shaft, and a milling plane is provided on the outer circle of its large end. The vertical section of the sensor fixing plate is fixed at the milling plane through fasteners, and the width of the milling plane is equal to the width of the vertical section of the sensor fixing plate. A number of through holes for installing pressure sensors for detecting the force during the press fitting and shaping process are provided on the horizontal section of the sensor fixing plate.

[0019] The press fitting and shaping device body is used for the outer diameter shaping of the pipe string and is composed of a shaping group and a guiding mechanism.

[0020] Among them, the shaping group is fixedly installed on the lower end face of the base through fasteners and includes a shaping blade 6 and a gland 8. The shaping blade is placed along the annular groove opened at the lower end inside the base. The gland is located at the bottom of the base and is fixedly connected to the base by symmetrically arranged bolts passing through the mounting holes on the gland, and at the same time covers and contacts the bottom surface of the base and the shaping blade, so that the shaping blade is fixed inside the base. At the same time, the thickness of the shaping blade is the same as the depth of the annular groove, and its inner hole is in the shape of a frustum of a cone, with the diameter of the upper circular hole smaller than that of the lower circular hole.

[0021] The guiding mechanism includes a transition push block 5 that plays a leading guiding role, a fixing rod 3, and a spring 4 for resetting. The transition push block is in the shape of a cylinder, with a circular hole opened at the lower end, making it in the shape of a sleeve and serving as the contact press fitting surface. A second annular groove for placing the spring is opened at the upper end centered on the axis, and the outer wall and inner wall of the second annular groove respectively correspond to the outer and inner diameters of the spring. A through hole is machined along the center of the transition push block; when the guiding mechanism is installed in the base, the upper and lower end faces of the spring respectively contact the inner wall of the base and the inside of the transition push block.

[0022] The fixing rod is in the shape of a bolt and consists of a rod body and a rod head. The rod body is inserted into the mating hole of the base, so that all components in the guiding mechanism are coaxially arranged with the base; a threaded hole is opened at the bottom of the rod body. When the fastener passes through the through hole on the transition push block, it is tightened and fixed to the threaded hole; the rod head contacts the top end face of the base, so that the spring is pre-compressed and fixed inside the base under the limitation of the length of the fixing rod, the head of the fixing rod, and the tightened bolt.

[0023] In this embodiment, by receiving a drive signal, the servo above the base is controlled to push the base downward along the fixing rod. When the pipe string bearing is press-fitted, the transition push block compresses the spring, and the shaping blade contacts the outer diameter of the pipe string to start shaping; when the sensor controls the servo to retract, the spring overcomes the self-weight of the pipe string and separates the part from the device, realizing the function of shaping during press fitting.

[0024] When this embodiment is in use, the specific use steps are as follows:

[0025] (1) Externally send a signal to push the base of the servo actuator 2 downward.

[0026] (2) When the bearing part on the transition push block of part 5 contacts the pipe string, start compressing the spring of part 4, but the base of part 2 still moves downward. At this time, the profiling blade of part 6 contacts the outer circle of the pipe string for profiling.

[0027] (3) After the pressure sensor on the sensor fixing plate of part 1 monitors that the force is qualified, send a servo signal to retract. The stress of the spring of part 4 is released, separating the device body from the pipe string and returning to the original position. Wait for the next signal to execute a cyclic action to achieve the function of profiling the outer diameter of the pipe string.

[0028] In addition to the above embodiments, the present utility model may also have other embodiments. All technical solutions using equivalent replacements or equivalent transformation forms fall within the protection scope required by the present utility model.

Claims

1. A device for shaping the outer diameter of a steering column, characterized in that: It includes a base and a sensor fixing plate, the base has a stepped shaft appearance, and a milling plane is set on the outer circle of its large end for installing the sensor fixing plate; the base is installed with a press-fitting device body for shaping the outer diameter of the pipe column, and the press-fitting device body includes a shaping group and a guiding mechanism; the shaping group is fixedly installed on the lower end surface of the base by fasteners; the guiding mechanism is installed inside the base in a bolt and nut structure and in a coaxial form; the sensor fixing plate is fixed to the milling plane of the base by bolts, and a pressure sensor for detecting the force of the press-fitting process is installed on its upper surface.

2. The device for trimming the outer diameter of a steering column according to claim 1, characterized in that: The shaping group consists of a shaping blade and a pressure cover; the shaping blade is placed along the annular groove opened at the lower end of the base, and the pressure cover is located at the bottom of the base. It is fixedly connected to the base after symmetrically arranged bolts penetrate the mounting holes on the pressure cover, and at the same time covers the contact base and the bottom surface of the shaping blade, so that the shaping blade is fixed inside the base.

3. The device for trimming the outer diameter of a steering column according to claim 2, characterized in that: The thickness of the trimming blade is the same as the depth of the annular groove, and the inner hole is in a truncated cone shape, and the diameter of the upper circular hole is smaller than the diameter of the lower circular hole.

4. The device for trimming the outer diameter of a steering column according to claim 1, characterized in that: The guide mechanism is composed of a fixed rod, a transition push block and a spring; the fixed rod is vertically inserted into a matching hole provided in the center of the base, and a threaded hole is processed at the bottom thereof for installing the transition push block; The transition push block is cylindrical in shape, with a circular hole at the lower end, making it sleeve-shaped and serving as a contact press-fitting surface. A second annular groove for placing a spring is provided at the upper end with the axis as the center, and a through hole is processed along the center of the transition push block. When the guide mechanism is installed into the base, the upper and lower end surfaces of the spring are in contact with the inner wall of the base and the interior of the transition push block respectively.

5. The device for trimming the outer diameter of a steering column according to claim 4, characterized in that: The outer wall and the inner wall of the second annular groove correspond to the outer circle and the inner circle size of the spring respectively.

6. The device for trimming the outer diameter of a steering column according to claim 4, characterized in that: The fixing rod is in the shape of a bolt, and is composed of a rod body and a rod head. The rod body is inserted into the matching hole of the base, so that all components in the guide mechanism are coaxially arranged with the base. A threaded hole is opened at the bottom of the rod body. When the fastener passes through the through hole on the transition push block, it is tightened and fixed with the threaded hole. The rod head contacts the top surface of the base, so that the spring is pre-compressed inside the base by the length of the fixing rod and the head of the fixing rod and the tightening bolts, so that it is fixed.

7. The device for trimming the outer diameter of a steering column according to claim 1, characterized in that: The sensor fixing plate is an L-shaped structure formed by bending a polygonal plate 90 degrees. Its vertical section is fixed to the milling plane of the base by bolts, and its width is equal to the width of the milling plane. The horizontal section is provided with a number of through holes for installing pressure sensors for detecting the force of the press fitting process.

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