Pressing rivet closing-up device of pressure sensor

Abstract

The utility model discloses a pressure riveting closing-up device of a pressure sensor, which comprises a lower die bottom plate and an upper die bottom plate, a lower die holder is arranged on the lower die bottom plate, a closing-up upper die is arranged on the upper die bottom plate, and a hold-down mechanism for pre-positioning the pressure sensor is arranged in the closing-up upper die; the pressing and holding mechanism comprises a mounting groove, the mounting groove is formed in the closing-in upper die, a compression spring is arranged in the mounting groove, one end of the compression spring is connected with a pressing rod, the pressing rod is movably arranged in the mounting groove, and a pre-pressing sleeve is further arranged at one end of the pressing rod; according to the press riveting device, in the press riveting process of the pressure sensor, longitudinal pre-pressing can be conducted on the pressure sensor, the shell edge closing-up uniformity is improved, the end of the pressure sensor can be transversely clamped and fixed, the pressure sensor is prevented from deviating, and the press riveting efficiency of the pressure sensor is improved. And the press-riveting precision of the upper cover and the shell is improved, and the qualified rate is increased.

Description

Technical Field

[0001] The utility model belongs to the technical field of riveting, and particularly relates to a riveting and closing device for a pressure sensor. Background Art

[0002] With the continuous progress of the automotive industry, the demand for pressure sensors is also increasing. An automotive pressure sensor is used for the oil pressure control of a braking system with an oil pressure booster device. It can detect the pressure of a pressure accumulator, output signals for closing or opening an oil pump, and give an alarm for abnormal oil pressure. It is internally provided with a semiconductor strain gauge, which utilizes the characteristic that the resistance changes when the shape of the strain gauge changes; in addition, it is also provided with a metal diaphragm, and the change in pressure is detected through the metal diaphragm strain gauge and converted into an electrical signal for external output.

[0003] The existing riveting and closing device for a pressure sensor uses a simple closing die to rivet and close the shell and the upper cover of the pressure sensor on a press; due to the use of a simple die, the workpiece cannot be reliably positioned, resulting in uneven closing of the shell edge and breakage. Also, because the die does not have a pre-pressing function, the upper cover of the pressure sensor sometimes cannot be pressed tightly, resulting in defective products. For this reason, we propose a riveting and closing device for a pressure sensor. Content of the Utility Model

[0004] The purpose of the utility model is to provide a riveting and closing device for a pressure sensor to solve the problems in the above-mentioned background art that the riveting and closing device cannot reliably position the workpiece, resulting in uneven closing of the shell edge and breakage, and also because the die does not have a pre-pressing function, the upper cover of the pressure sensor sometimes cannot be pressed tightly, resulting in defective products.

[0005] To achieve the above purpose, the utility model provides the following technical solution: a riveting and closing device for a pressure sensor, including a lower die base plate and an upper die base plate. A lower die seat is arranged on the lower die base plate, and a closing upper die is arranged on the upper die base plate. A pressing mechanism for pre-positioning the pressure sensor is arranged in the closing upper die.

[0006] The pressing mechanism includes an installation groove arranged in the closing upper die. A compression spring is arranged in the installation groove. One end of the compression spring is connected to a pressing rod, and the pressing rod is movably arranged in the installation groove. A pre-pressing sleeve is also arranged at one end of the pressing rod.

[0007] Wherein, a fixing mechanism for horizontally clamping the pressure sensor is also arranged on the lower die seat.

[0008] Preferably, a riveting opening is also arranged on the closing upper die, which can rivet the upper cover and the shell of the pressure sensor.

[0009] Preferably, a workpiece placement opening corresponding to the installation groove is provided on the lower die base, which can position the pressure sensor.

[0010] Preferably, the fixing mechanism includes a connecting frame, the connecting frame is arranged on the upper closing die, a upper wedge block is further arranged on the connecting frame, and a pressing component cooperating with the upper wedge block is further arranged on the lower die base.

[0011] Preferably, the pressing component includes a lower wedge block, the lower wedge block is arranged in a groove body, the groove body is arranged on the lower die base, a pressing rod is arranged on the lower wedge block, and the pressing rod extends into the workpiece placement opening. Through the transmission between the upper wedge block and the lower wedge block, the pressure sensor can be transversely clamped and fixed.

[0012] Preferably, a return spring is further arranged in the groove body, and one end of the return spring is connected to the lower wedge block, which can drive the lower wedge block to quickly reset and move.

[0013] Preferably, a pressing pad is arranged at one end of the pressing rod, and the pressing pad is attached to the end of the pressure sensor, further improving the stability during the pressing of the pressure sensor.

[0014] Preferably, a fixed seat is arranged on the lower die bottom plate, a guide post is arranged on the fixed seat, one end of the guide post is movably arranged in a guide sleeve, and the guide sleeve is arranged on the upper die bottom plate, which can guide the movement of the bottom of the upper die.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] (1) Through the elastic force of the compression spring, during the riveting process of the pressure sensor, the present utility model can longitudinally pre-press the pressure sensor during the riveting process, improving the uniformity of the closing of the outer shell edge.

[0017] (2) When the pressure sensor is riveted, the present utility model can transversely clamp and fix the end of the pressure sensor, avoiding the occurrence of the situation of the pressure sensor shifting, improving the riveting accuracy of the upper cover and the outer shell, and increasing the qualified rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the front view structural schematic diagram of the present utility model;

[0019] Figure 2 is Figure 1 the sectional structural schematic diagram at A-A in

[0020] Figure 3 is Figure 2 the enlarged structural schematic diagram of part B in

[0021] Figure 4 is the front view sectional structural schematic diagram of the fixing mechanism in the present utility model;

[0022] Figure 5 For Figure 4 The enlarged structural schematic diagram of part C in

[0023] In the figure: 1. Lower die bottom plate; 2. Lower die base; 3. Upper die bottom plate; 4. Fixed seat; 5. Guide pillar; 6. Guide sleeve; 7. Flaring upper die; 8. Pressure sensor; 9. Sensor bracket; 10. Workpiece placement opening; 11. Pre-pressing sleeve; 12. Pressing rod; 13. Compression spring; 14. Installation groove; 15. Riveting opening; 21. Connecting frame; 22. Upper wedge block; 23. Lower wedge block; 24. Return spring; 25. Groove body; 26. Pressing rod; 27. Pressing pad. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] Please refer to Figures 1 - 3 , the present invention provides a technical solution: a riveting and flaring device for a pressure sensor, including a lower die bottom plate 1 and an upper die bottom plate 3. A lower die base 2 is arranged on the lower die bottom plate 1, and a flaring upper die 7 is arranged on the upper die bottom plate 3. A pressing mechanism for pre-positioning the pressure sensor 8 is arranged in the flaring upper die 7;

[0026] The pressing mechanism includes an installation groove 14 arranged in the flaring upper die 7. A compression spring 13 is arranged in the installation groove 14. One end of the compression spring 13 is connected to a pressing rod 12. The pressing rod 12 is movably arranged in the installation groove 14, and a pre-pressing sleeve 11 is further arranged at one end of the pressing rod 12.

[0027] During the riveting process of the upper cover and the outer shell of the pressure sensor 8, the pre-pressing sleeve 11 fits with the upper cover. At the same time, the compression spring 13 is compressed by the pressing rod 12. Through the elastic force of the compression spring 13, the pre-pressing sleeve 11 can be made to fit with the upper cover and pre-fix the upper cover. Then, the upper cover and the outer shell are riveted by the flaring upper die 7.

[0028] Furthermore, a riveting opening 15 is also arranged on the flaring upper die 7, which can rivet the upper cover and the outer shell of the pressure sensor 8.

[0029] Furthermore, a workpiece placement opening 10 corresponding to the installation groove 14 is arranged on the lower die base 2. By placing the end of the pressure sensor 8 in the workpiece placement opening 10, the pressure sensor 8 can be positioned.

[0030] As a specific embodiment of the present application, please refer to Figure 4 and Figure 5 , a fixing mechanism for laterally clamping the pressure sensor 8 is further provided on the lower die base 2. The fixing mechanism includes an adapter bracket 21 which is arranged on the closing upper die 7. An upper wedge block 22 is further arranged on the adapter bracket 21, and one end of the adapter bracket 21 is also connected to the closing upper die 7. A pressing component cooperating with the upper wedge block 22 is further arranged on the lower die base 2. The pressing component includes a lower wedge block 23 which is arranged in a groove body 25. The groove body 25 is arranged on the lower die base 2. A pressing rod 26 is arranged on the lower wedge block 23. The pressing rod 26 extends into the workpiece placing opening 10. Through the transmission between the upper wedge block 22 and the lower wedge block 23, the pressure sensor 8 can be laterally clamped and fixed.

[0031] When the closing upper die 7 descends, it drives the upper wedge block 22 to move downward. Through the transmission between the upper wedge block 22 and the lower wedge block 23, the pressing rod 26 can be driven to move, and the end of the pressure sensor 8 is clamped and fixed through the pressing rod 26.

[0032] Furthermore, a return spring 24 is further arranged in the groove body 25. One end of the return spring 24 is connected to the lower wedge block 23. During the movement of the lower wedge block 23, the lower wedge block 23 compresses the return spring 24, and the lower wedge block 23 can be driven to quickly return and move.

[0033] Furthermore, a pressing pad 27 is arranged at one end of the pressing rod 26. The pressing pad 27 is in contact with the end of the pressure sensor 8, increasing the contact area with the end of the pressure sensor 8 and further improving the stability when pressing the pressure sensor 8.

[0034] Specifically, a fixing seat 4 is arranged on the lower die bottom plate 1. A guide post 5 is arranged on the fixing seat 4. One end of the guide post 5 is movably arranged in a guide sleeve 6. The guide sleeve 6 is arranged on the upper die bottom plate 3. When the upper die bottom plate 3 moves, it drives the guide sleeve 6 to move along the guide post 5, and the movement of the bottom of the upper die can be guided.

[0035] Furthermore, a sensor bracket 9 is further arranged on the lower die bottom plate 1, which can install an infrared displacement sensor to detect whether the pressure sensor 8 is placed or not.

[0036] The working principle and usage process of the present utility model:

[0037] First, install the upper die base plate 3 on the press. Place the pressure sensor 8 in the workpiece placement opening 10. Drive the bottom of the upper die to move through the press. The upper die base plate 3 drives the necking upper die 7 to move. The necking upper die 7 drives the pre-pressing sleeve 11 and the upper wedge block 22 to move downward. When the upper wedge block 22 is in good contact with the lower small wedge block, the upper wedge block 22 drives the lower wedge block 23 to move horizontally. The lower wedge block 23 drives the holding rod 26 to move horizontally. The holding rod 26 drives the holding pad 27 to move horizontally. Fix the end of the pressure sensor 8 through the holding pad 27. At the same time, after the pre-pressing sleeve 11 in the necking upper die 7 fits with the upper cover of the pressure sensor 8, as the necking upper die 7 continues to move downward, the pressing rod 12 compresses the compression spring 13. The compression spring 13, through its elastic force, fits the pre-pressing sleeve 11 with the upper cover and positions the upper cover. Then, rivet the upper cover of the pressure sensor 8 to the housing through the riveting opening 15.

[0038] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pressure riveting device for a pressure sensor, characterized in that: It comprises a lower die base plate (1) and an upper die base plate (3), wherein a lower die seat (2) is arranged on the lower die base plate (1), a closing upper die (7) is arranged on the upper die base plate (3), and a holding mechanism for pre-positioning a pressure sensor (8) is arranged inside the closing upper die (7); The holding mechanism comprises a mounting groove (14), the mounting groove (14) is arranged in the closing upper die (7), a compression spring (13) is arranged in the mounting groove (14), one end of the compression spring (13) is connected to the clamping rod (12), the clamping rod (12) is movably arranged in the mounting groove (14), and a pre-compression sleeve (11) is also arranged at one end of the clamping rod (12); Wherein, a fixing mechanism for laterally clamping the pressure sensor (8) is also provided on the lower die base (2).

2. The riveting device for a pressure sensor according to claim 1, characterized in that: The closing upper die (7) is also provided with a riveting opening (15).

3. The riveting device for a pressure sensor according to claim 1, characterized in that: The lower die base (2) is provided with a workpiece placement opening (10) corresponding to the mounting groove (14).

4. The riveting device for a pressure sensor according to claim 1, characterized in that: The fixing mechanism comprises a connecting frame (21), the connecting frame (21) is arranged on the closing upper die (7), an upper wedge block (22) is also arranged on the connecting frame (21), and a pressing component matched with the upper wedge block (22) is also arranged on the lower die base (2).

5. The riveting device for a pressure sensor according to claim 4, characterized in that: The holding assembly comprises a lower wedge block (23), wherein the lower wedge block (23) is arranged in a groove body (25), wherein the groove body (25) is arranged on a lower die base (2), and a holding rod (26) is arranged on the lower wedge block (23), wherein the holding rod (26) extends into a workpiece placement opening (10).

6. The riveting device for a pressure sensor according to claim 5, characterized in that: A return spring (24) is also arranged in the groove body (25), and one end of the return spring (24) is connected to the lower wedge block (23).

7. The riveting device for a pressure sensor according to claim 5, characterized in that: A pressure pad (27) is provided at one end of the pressure rod (26), and the pressure pad (27) is fitted with the end of the pressure sensor (8).

8. A riveting device for a pressure sensor according to any one of claims 1 to 7, characterized in that: A fixing seat (4) is arranged on the lower die bottom plate (1), a guide column (5) is arranged on the fixing seat (4), one end of the guide column (5) is movably arranged in a guide sleeve (6), and the guide sleeve (6) is arranged on the upper die bottom plate (3).

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