Automotive air pressure sensor inner core bushing press fitting tooling

Abstract

This utility model belongs to the field of sensor processing technology, specifically disclosing a tooling for pressing and fitting the inner core bushing of an automotive air pressure sensor. It addresses the technical problem of stress concentration caused by the deformation of the bushing edge area due to differences in elastic modulus during a single pressing operation, which then compresses the inner core sidewall. The tooling includes a base plate, a vertical plate mounted on the upper rear side of the base plate, an axial cylinder at the upper end of the vertical plate, and a telescopic column connected to the output end of the axial cylinder. The bushing and inner core are pre-aligned, and accurate pressing is achieved by combining an axial vertical pressing action with a circumferential wrapping centripetal pressing action. This process ensures that the deformation caused by the elastic modulus of the bushing edge area is eliminated during the pressing and fitting of the bushing and inner core, thus improving the processing efficiency of automotive air pressure sensors.

Description

Technical Field

[0001] This utility model relates to the field of sensor processing technology, and in particular to a tooling for press-fitting the inner core bushing of an automotive air pressure sensor. Background Technology

[0002] With the accelerated development of automotive intelligence, the requirements for the accuracy and reliability of automotive pressure sensors have significantly increased. The press-fitting process of the sensor core and bushing is a core manufacturing step that directly affects the sealing performance, signal stability, and product lifespan. The current mainstream process adopts one-time integral press-fitting. However, in high-precision scenarios (such as flexible sensor bushing assembly), due to the fragility of the core material (such as ceramic substrate) and the low deformation tolerance of the bushing (tolerance often needs to be ≤0.05mm), traditional single-point pressure can easily lead to micro-cracks in the core or misalignment of the bushing coaxiality, thereby causing signal drift. Existing press-fitting tooling mostly relies on rigid guide structures (CN206393550U) or rotary multi-station designs (CN221494949U). Although these can improve assembly efficiency, they still have the following problems: during one-time vertical press-fitting, the bushing edge area deforms first due to the difference in elastic modulus, which squeezes the inner core sidewall and causes micro-stress concentration. Therefore, a solution is proposed to address the aforementioned technical deficiencies. Utility Model Content

[0003] The purpose of this invention is to provide a tooling for pressing and fitting the inner core bushing of an automotive air pressure sensor, in order to solve the problem that the edge area of ​​the bushing deforms first due to the difference in elastic modulus during a single pressing, which in turn squeezes the side wall of the inner core and causes stress concentration.

[0004] The objective of this utility model can be achieved through the following technical solution: a tooling for press-fitting the inner core bushing of an automotive air pressure sensor, comprising a base plate, a vertical plate mounted on the upper rear side of the base plate, an axial cylinder disposed on the upper end of the vertical plate, a telescopic column connected to the output end of the axial cylinder, a rotating ring sleeved on the outside of the telescopic column, an offset cylinder hinged to the outside of the rotating ring, a main pressure block mounted on the bottom of the telescopic column, a secondary pressure block hinged to the output end of the offset cylinder, and the main pressure block and the secondary pressure block being rotatably connected at their proximal ends; a rotating platform rotatably disposed on the upper side of the base plate corresponding to the telescopic column, and a locking plate intermittently vertically corresponding to the main pressure block mounted on the rotating platform.

[0005] Preferably, a hinge rod is installed between the main pressure block and the auxiliary pressure block, and the auxiliary pressure block is deflected up and down outside the main pressure block by the extension and retraction of the offset cylinder.

[0006] Preferably, at least three of the aforementioned mounting plates are disposed on the upper side of the rotary table, a top plate is installed on the inner bottom of the rotary table, and a motor is disposed on the base plate corresponding to the lower center of the rotary table, the output end of the motor being connected to the rotary table.

[0007] Preferably, a top seat is installed on the upper front side of the upright plate, and a lifting seat for axial cylinder mounting is installed at the middle of the front end of the top seat.

[0008] Preferably, a second motor is installed at the bottom of the telescopic column, and the output end of the second motor is connected to the main pressure block.

[0009] Preferably, pressure pads are installed at the bottom of both the main pressure block and the auxiliary pressure block.

[0010] Preferably, a lifting rod is installed in the middle of the top plate, the lifting rod extends through the rotary table to the bottom, and the lower end of the lifting rod is provided with a lifting cylinder for vertical movement of the top plate.

[0011] The beneficial effects of this utility model are: (1) This utility model pre-connects the bushing and the inner core, and completes the accurate pressing by combining the axial vertical pressing action with the circumferential wrapping centripetal pressing action. In this process, it can ensure that the deformation caused by the elastic modulus is eliminated in the bushing edge area during the pressing of the bushing and the inner core, which is beneficial to improving the processing efficiency of the automotive air pressure sensor. (2) The main pressure block is vertically pressed down by the extension and retraction of the axial cylinder. At the same time, the auxiliary pressure block can tilt at an angle with the main pressure block under the extension and retraction of the offset cylinder. Finally, the main pressure block and the auxiliary pressure block are pressed down synchronously to complete the accurate pressing. When the axial vertical pressing action is combined with the circumferential wrapping centripetal pressing action, the auxiliary pressure block is tilted and pressed on the top side of the inner core. In this process, the motor drives the main pressure block and the auxiliary pressure block to rotate together. Together with the vertical pressing action of the axial cylinder, the inner core is accurately pressed into the bushing, preventing stress concentration caused by pressing deformation and ensuring improved assembly efficiency of the bushing and the inner core. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings; Figure 1 This is a three-dimensional structural view of the entire utility model; Figure 2 This is a bottom view structural diagram of this utility model; Figure 3 This is a partial structural schematic diagram of the press-fit assembly of this utility model; Figure 4 This is a schematic diagram of the installation structure of the bushing retaining plate of this utility model; Figure 5 This is a side sectional view of the present invention.

[0013] Legend: 1. Base plate; 2. Vertical plate; 3. Top seat; 4. Lifting seat; 5. Axial cylinder; 6. Telescopic column; 7. Rotary table; 8. Locking plate; 9. Motor 1; 10. Lifting rod; 11. Offset cylinder; 12. Motor 2; 13. Main pressure block; 14. Secondary pressure block; 15. Hinge rod; 16. Pressure pad; 17. Top plate; 18. Rotating ring. Detailed Implementation

[0014] 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.

[0015] Example 1: This example is used to solve the problem that the bushing edge area deforms first due to the difference in elastic modulus during a single press-fitting process, which in turn squeezes the inner core sidewall and causes stress concentration.

[0016] Please see Figure 1 - Figure 5 As shown, this embodiment is a tooling for press-fitting the inner core bushing of an automotive air pressure sensor, including a base plate 1. A vertical plate 2 is mounted on the upper rear side of the base plate 1. An axial cylinder 5 is provided on the upper end of the vertical plate 2. The output end of the axial cylinder 5 is connected to a telescopic column 6. A rotating ring 18 is sleeved on the outside of the telescopic column 6. An offset cylinder 11 is hinged to the outside of the rotating ring 18. A main pressure block 13 is mounted on the bottom of the telescopic column 6. A secondary pressure block 14 is hinged to the output end of the offset cylinder 11. The main pressure block 13 and the secondary pressure block 14 are rotatably connected at their proximal ends. A rotating platform 7 is rotatably provided on the upper side of the base plate 1 corresponding to the telescopic column 6. A locking plate 8 is mounted on the rotating platform 7, which is intermittently vertically corresponding to the main pressure block 13. For the press-fitting process of the inner core and bushing of the pressure sensor, the press-fitting process is completed by combining the direct pressing of the main pressing block 13 and the auxiliary outer ring pressing of the secondary pressing block 14. Specifically, the main pressing block 13 is vertically pressed down under the extension and retraction of the axial cylinder 5, while the secondary pressing block 14 can tilt at an angle with the main pressing block 13 under the extension and retraction of the offset cylinder 11, so as to achieve accurate press-fitting by synchronous pressing of the main pressing block 13 and the secondary pressing block 14.

[0017] Reference Figure 3As shown, a hinge rod 15 is installed between the main pressure block 13 and the auxiliary pressure block 14. The auxiliary pressure block 14 is tilted up and down outside the main pressure block 13 by the extension and retraction of the bias cylinder 11. The auxiliary outer ring pressure action of the auxiliary pressure block 14 is achieved by the extension and retraction of the bias cylinder 11. Specifically, when the bias cylinder 11 is activated, it causes the auxiliary pressure block 14 to tilt outside the main pressure block 13. At this time, the main pressure block 13 and the auxiliary pressure block 14 simultaneously contact the inner core, thereby forming a centering press fit with the bushing. At least three mounting plates 8 are disposed on the upper side of the rotating table 7. A top plate 17 is installed on the inner bottom of the rotating table 7. A motor 9 is disposed on the lower center of the base plate 1 corresponding to the rotating table 7. The output end of the motor 9 is connected to the rotating table 7. It should be noted that: In this utility model, when pressing the inner core and the bushing together, the bushing is pre-placed in the mounting plate 8. The bushing is picked up by the robot / suction cup in the prior art and placed into the mounting plate 8. Then, the inner core is moved above the bushing by the robot / suction cup for placement. Then, the accurate pressing is completed by the cooperative action of the main pressing block 13 and the auxiliary pressing block 14.

[0018] The basic principle of this utility model is as follows: When assembling the bushing and inner core of an automotive air pressure sensor, the bushing and inner core are pre-aligned, and the accurate pressing is completed by combining the axial vertical pressing action with the circumferential wrapping centripetal pressing action. In this process, it can ensure that the deformation caused by the elastic modulus is eliminated in the edge area of ​​the bushing during the pressing process of the bushing and inner core, which is beneficial to improving the processing efficiency of automotive air pressure sensors.

[0019] Example 2: This example is used to solve the problem of how to ensure accurate pressing when the vertical pressing action is skewed during the pressing process.

[0020] Please see Figure 1 , Figure 4 - Figure 5 As shown, the press-fit fixture for the inner core bushing of the vehicle air pressure sensor in this embodiment includes a top seat 3 installed on the upper front side of the vertical plate 2, and a lifting seat 4 for axial cylinder 5 installed in the middle of the front end of the top seat 3. A second motor 12 is installed at the bottom of the telescopic column 6. The output end of the second motor 12 is connected to the main pressure block 13. Pressure pads 16 are installed at the bottom of both the main pressure block 13 and the auxiliary pressure block 14. The second motor 12 added here provides rotation drive for the auxiliary pressure block 14 when performing axial wrapping centripetal pressing action. The second motor 12 drives the main pressure block 13 and the auxiliary pressure block 14 to rotate together, so as to achieve accurate pressing of the inner core into the bushing. A lifting rod 10 is installed in the middle of the top plate 17. The lifting rod 10 extends through the rotary table 7 to the bottom. The lower end of the lifting rod 10 is equipped with a lifting cylinder for vertical movement of the top plate 17. Each assembled bushing and inner core is moved upward by the lifting cylinder, and the top plate 17 lifts the bushing and inner core upward. Then, the finished product is transferred by a robot arm / suction cup. Please see Figure 3 - Figure 5 As shown, the basic principle of this embodiment is as follows: When the axial vertical pressing action is combined with the circumferential wrapping centripetal pressing action in conjunction with the first embodiment, the auxiliary pressing block 14 is precisely pressing the top side of the inner core at an angle. During this process, the motor 12 drives the main pressing block 13 and the auxiliary pressing block 14 to rotate together, and together with the vertical pressing action of the axial cylinder 5, they complete the accurate pressing of the inner core into the bushing, preventing stress concentration caused by pressing deformation and ensuring improved assembly efficiency of the bushing and the inner core.

[0021] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

Claims

1. A tooling for press-fitting the inner core bushing of an automotive air pressure sensor, comprising a substrate (1), characterized in that, A vertical plate (2) is installed on the upper rear side of the base plate (1). An axial cylinder (5) is provided on the upper end of the vertical plate (2). A telescopic column (6) is connected to the output end of the axial cylinder (5). A rotating ring (18) is sleeved on the outside of the telescopic column (6). An offset cylinder (11) is hinged to the outside of the rotating ring (18). A main pressure block (13) is installed at the bottom of the telescopic column (6). A secondary pressure block (14) is hinged to the output end of the offset cylinder (11). The main pressure block (13) and the secondary pressure block (14) are rotatably connected at their close ends. A rotating platform (7) is rotatably provided on the upper side of the base plate (1) corresponding to the telescopic column (6). A clamping plate (8) is installed on the rotating platform (7) that is intermittently vertically corresponding to the main pressure block (13).

2. The press-fit tooling for the inner core bushing of the vehicle pressure sensor according to claim 1, characterized in that, A hinge rod (15) is installed between the main pressure block (13) and the secondary pressure block (14). The secondary pressure block (14) is tilted up and down outside the main pressure block (13) by the extension and retraction of the offset cylinder (11).

3. The press-fit fixture for the inner core bushing of the vehicle pressure sensor according to claim 1, characterized in that, At least three of the aforementioned card plates (8) are disposed on the upper side of the rotating platform (7), and a top plate (17) is installed on the inner bottom of the rotating platform (7). A motor (9) is disposed on the base plate (1) at the lower center of the rotating platform (7), and the output end of the motor (9) is connected to the rotating platform (7).

4. The press-fit fixture for the inner core bushing of the vehicle pressure sensor according to claim 1, characterized in that, A top seat (3) is installed on the upper front side of the upright plate (2), and a lifting seat (4) for axial cylinder (5) is installed in the middle of the front end of the top seat (3).

5. The press-fit fixture for the inner core bushing of the vehicle pressure sensor according to claim 3, characterized in that, The bottom end of the telescopic column (6) is equipped with a second motor (12), and the output end of the second motor (12) is connected to the main pressure block (13).

6. The press-fit fixture for the inner core bushing of the vehicle pressure sensor according to claim 1, characterized in that, Pressure pads (16) are installed at the bottom of both the main pressure block (13) and the auxiliary pressure block (14).

7. The press-fit fixture for the inner core bushing of the vehicle pressure sensor according to claim 3, characterized in that, Each of the top plates (17) is equipped with a lifting rod (10) in the middle. The lifting rod (10) extends through the rotating table (7) to the bottom. The lower end of the lifting rod (10) is provided with a lifting cylinder for vertical movement of the top plate (17).

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