Assembly jig for sealing oil cavity of sensor

Abstract

The utility model discloses an assembling jig for sealing an oil cavity of a sensor. The assembling jig comprises a base, a support fixedly arranged on the base, a sensor fixing seat fixedly assembled on the support and a pressing column fixed through a connecting seat. The sensor fixing seat is provided with a fixing seat concave cavity for placing a sensor; the pressing column is vertically arranged above the concave cavity of the fixed seat; a driving shaft of the press-fit cylinder is fixedly connected with the connecting seat, so that the press-fit cylinder drives the connecting seat to ascend and descend so as to drive the press-fit column to vertically press downwards; an annular boss is arranged on the inner side wall of the fixing base concave cavity, and a concave hole is formed in the middle of the annular boss. A columnar pressing head is arranged at the end, facing the concave cavity of the fixing base, of the pressing column. According to the assembling jig, the sensor is placed through the sensor fixing seat, and the columnar pressing head is driven to press downwards through the pressing column, so that the metal ball is pressed in the circuit board through hole formed in the circuit board in the sensor, the oil cavity is tightly sealed, and bubbles caused in the sealing process of the oil cavity are avoided.

Description

Technical Field

[0001] This utility model relates to the field of processing fixture technology, and in particular to an assembly fixture for sealing the oil cavity of a sensor. Background Technology

[0002] To transmit minute deformations, high-precision sensors incorporate an oil cavity between the diaphragm and the sensing element. This oil cavity transmits the vibrational deformation of the diaphragm to the sensing element, enabling it to detect the deformation and generate a signal. Figure 3 The sensor shown requires a diaphragm to sense subtle structural changes and transmits vibrational deformation to a sensing chip on a circuit board via oil injected into an oil cavity. Since the oil cavity is used to transmit vibrational deformation to the sensing chip, a high degree of sealing is necessary. Existing technology typically involves injecting oil into the oil cavity, then heating and melting a metal ball (e.g., a solder ball) and inserting it into a through-hole on the circuit board to seal the oil cavity. However, this method causes heat to be conducted into the oil cavity during the heating process, leading to partial oil vaporization. This results in air bubbles in the oil cavity, in addition to liquid oil, affecting the sensor's detection accuracy. Therefore, the existing method of sealing the sensor's oil cavity with a molten metal ball presents a problem that impacts the sensor's detection accuracy. Summary of the Invention

[0003] The present invention provides an assembly fixture for sealing the oil cavity of a sensor, which aims to solve the problem of affecting the detection accuracy of the sensor by sealing the oil cavity of the sensor with molten metal balls in the prior art.

[0004] This utility model discloses an assembly fixture for sealing the oil cavity of a sensor, wherein the assembly fixture includes a base, a support fixedly disposed on the base, a sensor fixing seat fixedly assembled on the support, and a pressing column fixed by a connecting seat.

[0005] The sensor mounting base is provided with a mounting cavity for placing the sensor; the pressing column is vertically arranged above the mounting cavity; the drive shaft of the pressing cylinder is fixedly connected to the connecting seat, so as to drive the connecting seat to rise and fall through the pressing cylinder, thereby driving the pressing column to press down vertically.

[0006] The inner wall of the fixed seat cavity is provided with an annular boss, and a concave hole is formed in the middle of the annular boss; the end of the pressing column facing the fixed seat cavity is provided with a columnar pressure head.

[0007] The assembly fixture for sealing the oil cavity of the sensor is provided in such a way that the side wall of the sensor fixing seat is provided with at least one side wall groove, the side wall groove extends toward the annular boss and communicates with the concave hole.

[0008] The assembly fixture for sealing the oil cavity of the sensor is provided with two opposite sidewall grooves on the sidewall of the sensor mounting base.

[0009] The assembly fixture for sealing the oil cavity of the sensor, wherein the outer diameter of the cylindrical pressure head is smaller than the outer diameter of the pressing column, and the inner diameter of the concave hole is larger than the outer diameter of the pressing column.

[0010] The assembly fixture for sealing the oil cavity of the sensor, wherein the vertical distance between the opening of the fixed seat cavity and the top surface of the annular boss is not less than 1 / 4 of the inner diameter of the fixed seat cavity.

[0011] The assembly fixture for sealing the oil cavity of the sensor is provided with a support column at the bottom end of the sensor fixing base; the support column is embedded in the support through hole provided on the support for fixation.

[0012] The assembly fixture for sealing the oil cavity of the sensor is provided with a support groove at the end of the support away from the base. The support groove divides the end of the support away from the base into two clamping components that are arranged opposite to each other.

[0013] The two clamping components are located on both sides of the support column, and the fixing bolts are sequentially inserted into the screw holes provided on the two clamping components to clamp the two clamping components together.

[0014] The assembly fixture for sealing the oil cavity of the sensor, wherein the base includes a horizontally arranged base through hole, and one end of the support away from the support groove extends into the base through hole for fixation;

[0015] A base groove is provided above the base through hole, the base groove extends into the base through hole and divides the upper part of the base; the fixing bolt passes through the upper part of the base and locks the base through hole.

[0016] The assembly fixture for sealing the oil cavity of the sensor, wherein the connecting seat includes a connecting plate, a transverse support rod and a pressing plate;

[0017] The pressing plate is pressed and fixed onto the connecting plate, and the transverse support rod is embedded in the through hole between the pressing plate and the connecting plate for fixation;

[0018] The transverse support rod has a support rod through hole at one end away from the pressing plate, and the pressing column passes into the support rod through hole.

[0019] The assembly fixture for sealing the oil cavity of the sensor is provided with a support rod groove at the end of the transverse support rod away from the pressure plate. The support rod groove divides the end of the transverse support rod away from the pressure plate into two opposing support parts.

[0020] The two support parts are located on both sides of the pressing column, and the fixing bolts pass through the screw holes provided on the two support parts in sequence to clamp the two support parts together.

[0021] This utility model discloses an assembly fixture for sealing the oil cavity of a sensor. The fixture includes a base, a support fixedly mounted on the base, a sensor mounting base fixedly mounted on the support, and a pressing column fixed by a connecting seat. The sensor mounting base has a mounting cavity for placing the sensor. The pressing column is vertically positioned above the mounting cavity. A drive shaft of a pressing cylinder is fixedly connected to the connecting seat, so that the pressing cylinder drives the connecting seat to rise and fall, thereby causing the pressing column to press down vertically. The inner wall of the mounting cavity has an annular boss, and a recess is formed in the middle of the annular boss. One end of the pressing column facing the mounting cavity has a columnar pressure head. This assembly fixture, by placing the sensor on the sensor mounting base and using the pressing column to drive the columnar pressure head downwards, presses a metal ball into the circuit board through-hole on the circuit board of the sensor, thereby achieving a tight seal of the oil cavity, preventing air bubbles from forming in the oil cavity during the sealing process, and improving the detection accuracy of the sensor with the oil cavity sealed. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is an overall structural diagram of the assembly fixture for sealing the oil cavity of a sensor provided in an embodiment of the present invention;

[0024] Figure 2 A partial structural diagram of the assembly fixture for sealing the oil cavity of a sensor provided in an embodiment of this utility model;

[0025] Figure 3 This is a cross-sectional view of the sensor assembled using the assembly fixture for sealing the oil cavity of the sensor provided in this embodiment of the utility model.

[0026] Reference numerals: 1. Base; 2. Support; 3. Sensor mounting base; 4. Connecting base; 5. Pressing column; 31. Mounting base cavity; 32. Annular boss; 321. Hole; 51. Columnar pressure head; 33. Side wall groove; 34. Support column; 21. Support groove; 6. Fixing bolt; 11. Base groove; 41. Connecting plate; 42. Horizontal support rod; 43. Pressing plate; 44. Drive shaft; 421. Support rod groove; 7. Sensor; 71. Diaphragm; 72. Sensor base; 73. Circuit board; 74. Metal ball; 731. Circuit board through hole; 75. Oil cavity. Detailed Implementation

[0027] 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, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0028] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0029] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0030] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0031] This utility model discloses an assembly fixture for sealing the oil cavity of a sensor, such as... Figures 1 to 2As shown, the assembly fixture includes a base 1, a support 2 fixedly mounted on the base 1, a sensor mounting base 3 fixedly mounted on the support 2, and a pressing column 5 fixed by a connecting seat 4; the sensor mounting base 3 is provided with a mounting cavity 31 for placing the sensor 7; the pressing column 5 is vertically arranged above the mounting cavity 31; the drive shaft 44 of the pressing cylinder is fixedly connected to the connecting seat 4, so as to drive the connecting seat 4 to rise and fall by the pressing cylinder, thereby driving the pressing column 5 to press down vertically; the inner side wall of the mounting cavity 31 is provided with an annular boss 32, and a concave hole 321 is formed in the middle of the annular boss 32; a columnar pressure head 51 is provided at one end of the pressing column 5 facing the mounting cavity 31.

[0032] Support 2 is fixedly mounted on base 1, sensor mounting base 3 is fixedly mounted on support 2, and sensor 7 is fixedly placed in mounting cavity 31 of sensor mounting base 3; wherein, the specific structure of sensor 7 is as follows Figure 3 As shown, the sensor 7 mainly includes a diaphragm 71, a sensor base 72, and a circuit board 73. The circuit board 73 has a through-hole 731 for oil injection. The space between the circuit board 73 and the diaphragm 71 forms an oil cavity 75, which holds oil. A metal ball 74 is used to seal the through-hole 731. During assembly, the sensor 7 is placed upside down in the mounting cavity 31, with the through-hole 731 facing upwards. To ensure the sensor 7 is securely placed in the mounting cavity 31 and to prevent displacement, the shape of the mounting cavity 31 needs to be designed according to the sensor 7's external structure. Since the sensor base 72 has an outwardly protruding flange at its bottom, a ring-shaped boss 32 can be provided in the mounting cavity 31. The recess 321 formed in the center of the ring-shaped boss 32 is used to place the sensor 7, and the outer flange of the sensor 7 rests on the top surface of the ring-shaped boss 32.

[0033] The end of the pressing column 5 facing the cavity 31 of the fixing seat is provided with a columnar pressing head 51. The columnar pressing head 51 can be used to concentrate the pressing force and increase the pressure applied to the metal ball 74, thereby deforming the metal ball 74 and embedding it into the circuit board through hole 731 through the strong pressure. At the same time, the metal ball 74 can be a solder ball or any other spherical component made of a metal material that is easy to deform; the metal ball 74 can also be replaced by a non-spherical metal part, such as a wedge-shaped metal part, a conical metal part, a columnar metal part with a cut-off tip, etc.

[0034] In a more specific embodiment, the sidewall of the sensor mounting base 3 is provided with at least one sidewall groove 33, which extends toward the annular boss 32 and communicates with the recess 321. Specifically, two sidewall grooves 33 are provided opposite to each other on the sidewall of the sensor mounting base 3. The outer diameter of the columnar pressure head 51 is smaller than the outer diameter of the pressing column 5, and the inner diameter of the recess 321 is larger than the outer diameter of the pressing column 5.

[0035] Furthermore, to enable the sensor 7 to be quickly detached from the mounting cavity 31 after assembly, at least one sidewall groove 33 can be provided on the sidewall of the sensor mounting base 3. The clamping assembly can then extend into the sidewall groove 33 and quickly detach the sensor 7 from the mounting cavity 31. Furthermore, to improve the detachment efficiency of the clamping assembly, two sidewall grooves 33 can be provided opposite each other on the sidewall of the sensor mounting base 3, as shown in the specific configuration below. Figure 2 As shown.

[0036] Furthermore, to ensure reliable pressing of the metal ball 74 by the pressing column 5, the outer diameter of the columnar pressing head 51 can be set to be smaller than the outer diameter of the pressing column 5. In a preferred embodiment, the outer diameter of the columnar pressing head 51 is 0.2-0.6 times the outer diameter of the pressing column 5. At the same time, in order to allow the pressing column 5 to smoothly extend into the recessed hole 321, the inner diameter of the recessed hole 321 can be set to be larger than the outer diameter of the pressing column 5. In a preferred embodiment, the inner diameter of the recessed hole 321 can be set to be 1.5-4 times the outer diameter of the pressing column 5.

[0037] In a more specific embodiment, the vertical distance between the opening of the fixed seat cavity 31 and the top surface of the annular boss 32 is not less than 1 / 4 of the inner diameter of the fixed seat cavity 31.

[0038] Furthermore, to improve the reliability of fixing the sensor 7, the vertical distance between the opening of the fixing seat cavity 31 and the top surface of the annular boss 32 can be set to be no less than 1 / 4 of the inner diameter of the fixing seat cavity 31; the vertical distance between the opening of the fixing seat cavity 31 and the top surface of the annular boss 32 is set to a certain height to prevent the sensor 7 from sliding out of the fixing seat cavity 31 during the pressing and assembly of the metal ball 74.

[0039] In a more specific embodiment, the bottom end of the sensor mounting base 3 is provided with a support column 34; the support column 34 is embedded in the through hole of the support 2 provided on the support 2 for fixation. The end of the support 2 away from the base 1 is also provided with a support groove 21, which divides the end of the support 2 away from the base 1 into two opposing clamping components; the two clamping components are respectively located on both sides of the support column 34, and fixing bolts 6 are sequentially inserted into the screw holes provided on the two clamping components to clamp the two clamping components together.

[0040] Specifically, to securely fix the sensor mounting base 3, a support column 34 can be provided at the bottom of the sensor mounting base 3. Simultaneously, a through hole is provided on the support 2, allowing the support column 34 to be embedded within the through hole for fixation. Alternatively, a support groove 21 can be provided to divide the end of the support 2 away from the base 1 into two clamping components. Fixing bolts 6 are then inserted sequentially into the screw holes on the two clamping components. Tightening the fixing bolts 6 clamps the components, thus securing the sensor mounting base 3 securely. The specific structure is as follows... Figure 1 As shown.

[0041] In a more specific embodiment, the base 1 includes a horizontally arranged base 1 through hole, and the end of the support 2 away from the support groove 21 extends into the base 1 through hole for fixation; a base groove 11 is provided above the base 1 through hole, the base groove 11 extends into the base 1 through hole and divides the upper part of the base 1; the fixing bolt 6 passes through the upper part of the base 1 and locks the base 1 through hole.

[0042] Similarly, a through hole can be provided on the base 1. When the fixing bolt 6 is loosened, the support 2 can be pushed to slide within the through hole of the base 1 by external force, thereby quickly adjusting the horizontal position of the support 2. A base groove 11 is provided to divide the upper part of the base 1. The fixing bolt 6 passes through the upper part of the base 1. By tightening the fixing bolt 6, the upper part of the base 1 can be locked to the through hole of the base 1, thus achieving a stable fixation of the support 2. The specific structure is as follows. Figure 1 As shown.

[0043] In a more specific embodiment, the connecting seat 4 includes a connecting plate 41, a transverse support rod 42, and a pressing plate 43; the pressing plate 43 is pressed and fixed onto the connecting plate 41, and the transverse support rod 42 is embedded in the through hole between the pressing plate 43 and the connecting plate 41 for fixation; the end of the transverse support rod 42 away from the pressing plate 43 is provided with a support rod through hole, and the pressing column 5 passes through the support rod through hole. The end of the transverse support rod 42 away from the pressing plate 43 is also provided with a support rod groove 421, which divides the end of the transverse support rod 42 away from the pressing plate 43 into two opposing support parts; the two support parts are respectively located on both sides of the pressing column 5, and fixing bolts 6 sequentially pass through the screw holes provided on the two support parts to clamp the two support parts together.

[0044] Specifically, a transverse support rod 42 can be fixed by embedding it into the through hole between the pressing plate 43 and the connecting plate 41. When the fixing bolt 6 is loosened, the transverse support rod 42 can be pushed to slide along the through hole by external force, thereby quickly adjusting the horizontal position of the transverse support rod 42. The end of the connecting plate 41 away from the pressing plate 43 is fixedly connected to the drive shaft 44. Further, a support rod groove 421 is provided to cut the end of the transverse support rod 42 away from the pressing plate 43 into two support parts. The fixing bolt 6 is connected to the screw holes provided on the two support parts in sequence. By tightening the fixing bolt 6, the two support parts can be clamped together, thus achieving a stable fixation of the pressing column 5. The specific structure is as follows. Figure 1 As shown.

[0045] This utility model discloses an assembly fixture for sealing the oil cavity of a sensor. The assembly fixture includes a base 1, a support 2 fixedly mounted on the base 1, a sensor mounting base 3 fixedly mounted on the support 2, and a pressing column 5 fixed by a connecting seat 4. The sensor mounting base 3 is provided with a mounting cavity 31 for placing a sensor 7. The pressing column 5 is vertically arranged above the mounting cavity 31. The drive shaft 44 of the pressing cylinder is fixedly connected to the connecting seat 4 so that the pressing cylinder drives the connecting seat 4 to rise and fall, thereby driving the pressing column 5 to press down vertically. The inner sidewall of the mounting cavity 31 is provided with an annular boss 32, and a concave hole 321 is formed in the middle of the annular boss 32. The pressing column 5 is provided with a columnar pressure head 51 at one end facing the mounting cavity 31. The aforementioned assembly fixture places the sensor 7 on the sensor mounting base 3 and drives the columnar pressure head 51 to press down, thereby pressing the metal ball 74 into the circuit board through hole 731 provided on the circuit board 73 of the sensor 7. This achieves a tight seal on the oil cavity 75, preventing air bubbles from appearing in the oil cavity 75 during the sealing process and improving the detection accuracy of the sensor 7 when sealing the oil cavity 75.

[0046] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. An assembly fixture for sealing the oil cavity of a sensor, characterized in that, The assembly fixture includes a base, a support fixedly mounted on the base, a sensor mounting base fixedly mounted on the support, and a pressing column fixed by a connecting seat. The sensor mounting base is provided with a mounting cavity for placing the sensor; the pressing column is vertically arranged above the mounting cavity; the drive shaft of the pressing cylinder is fixedly connected to the connecting seat, so as to drive the connecting seat to rise and fall through the pressing cylinder, thereby driving the pressing column to press down vertically. The inner wall of the fixed seat cavity is provided with an annular boss, and a concave hole is formed in the middle of the annular boss; the end of the pressing column facing the fixed seat cavity is provided with a columnar pressure head.

2. The assembly fixture for sealing the oil cavity of a sensor according to claim 1, characterized in that, The side wall of the sensor mounting base is provided with at least one side wall groove, which extends toward the annular boss and communicates with the concave hole.

3. The assembly fixture for sealing the oil cavity of a sensor according to claim 2, characterized in that, The sensor mounting base has two opposite sidewall grooves.

4. The assembly fixture for sealing the oil cavity of a sensor according to claim 3, characterized in that, The outer diameter of the columnar pressure head is smaller than the outer diameter of the pressing column, and the inner diameter of the concave hole is larger than the outer diameter of the pressing column.

5. The assembly fixture for sealing the oil cavity of a sensor according to claim 4, characterized in that, The vertical distance between the opening of the fixed seat cavity and the top surface of the annular boss is not less than 1 / 4 of the inner diameter of the fixed seat cavity.

6. The assembly fixture for sealing the oil cavity of a sensor according to any one of claims 1-5, characterized in that, The bottom end of the sensor mounting base is provided with a support column; the support column is embedded in the support through hole provided on the support for fixation.

7. The assembly fixture for sealing the oil cavity of a sensor according to claim 6, characterized in that, The support is further provided with a support groove at the end away from the base, and the support groove divides the end of the support away from the base into two clamping components that are arranged opposite to each other. The two clamping components are located on both sides of the support column, and the fixing bolts are sequentially inserted into the screw holes provided on the two clamping components to clamp the two clamping components together.

8. The assembly fixture for sealing the oil cavity of a sensor according to claim 7, characterized in that, The base includes a horizontally arranged base through hole, and the end of the support away from the support groove extends into the base through hole for fixation; A base groove is provided above the base through hole, the base groove extends into the base through hole and divides the upper part of the base; the fixing bolt passes through the upper part of the base and locks the base through hole.

9. The assembly fixture for sealing the oil cavity of a sensor according to any one of claims 1-5, characterized in that, The connecting seat includes a connecting plate, a transverse support rod, and a pressing plate; The pressing plate is pressed and fixed onto the connecting plate, and the transverse support rod is embedded in the through hole between the pressing plate and the connecting plate for fixation; The transverse support rod has a support rod through hole at one end away from the pressing plate, and the pressing column passes into the support rod through hole.

10. The assembly fixture for sealing the oil cavity of a sensor according to claim 9, characterized in that, The end of the transverse support rod away from the pressing plate is also provided with a support rod groove, which divides the end of the transverse support rod away from the pressing plate into two opposing support parts; The two support parts are located on both sides of the pressing column, and the fixing bolts pass through the screw holes provided on the two support parts in sequence to clamp the two support parts together.

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