Pressurizing jig for sensor

Abstract

The utility model provides a sensor pressurization jig which comprises a bottom plate, a sliding rod is arranged on the bottom plate, a pressing plate set, a pressure maintaining mechanism and a locking sleeve are connected to the sliding rod in a sliding mode, and the locking sleeve is located above the pressing plate set and the pressure maintaining mechanism so that the pressing plate set and the pressure maintaining mechanism can be pressed to the bottom plate when the locking sleeve slides downwards. The pressing plate set comprises a plurality of pressing plates connected to the sliding rod in a sliding mode, the pressure maintaining mechanism comprises an elastic piece which can be pressed to deform and further store energy when the locking sleeve slides downwards, a containing groove surrounding the sliding rod is formed in the locking sleeve, and a self-locking cavity is defined by the groove wall of the containing groove and the cylindrical surface of the sliding rod. A rolling body is placed in the self-locking cavity, the width of the self-locking cavity is gradually reduced from top to bottom so as to prevent the rolling body from rolling to the bottom of the self-locking cavity, and the sensor pressurizing jig aims to overcome the defects in the prior art and can reduce the working intensity, improve the efficiency and improve the product quality.

Description

Technical Field

[0001] The utility model specifically relates to a sensor pressurizing fixture. Background Art

[0002] During the production process of pressure sensors, it is usually necessary to use a special patch adhesive to bond the aluminum elastomer and the strain gauge together. The patch adhesive needs to be cured under a high temperature environment and a certain pressure. Accurate operation is required when patching the pressure sensor. However, the current practice of pressurizing the sensor on the market is to manually place the sensor into a pressurizing jig, then place the entire pressurizing jig in a pressurizing machine to apply a fixed pressure to the jig, and then manually lock the jig by means of nuts, buckles, etc. Therefore, the existing manufacturing method is extremely dependent on manual work, with high labor intensity and low operating efficiency. Moreover, during the installation process, this type of manufacturing method causes the worker's operating error to apply different forces to the patch, resulting in inconsistent zero-position output of the pressure sensor, resulting in uneven product quality. Manufacturers need to add subsequent calibration procedures, which increases manufacturing costs.

[0003] The utility model is produced based on the above-mentioned shortcomings. Utility Model Content

[0004] The utility model aims to overcome the deficiencies of the prior art and provide a sensor pressurizing fixture which can reduce work intensity, improve efficiency and improve product quality.

[0005] The utility model is realized by the following technical solutions:

[0006] A sensor pressurizing fixture comprises a base plate, a sliding rod is provided on the base plate, a pressure plate group, a pressure maintaining mechanism and a locking sleeve are slidably connected to the sliding rod, the locking sleeve is located above the pressure plate group and the pressure maintaining mechanism, so that when the locking sleeve slides downward, the pressure plate group and the pressure maintaining mechanism can be pressed toward the base plate, the pressure plate group comprises a plurality of pressure plates slidably connected to the sliding rod, the pressure maintaining mechanism comprises an elastic member that can be compressed and deformed when the locking sleeve slides downward, and thus stores energy, the locking sleeve is provided with a receiving groove surrounding the sliding rod, the groove wall of the receiving groove and the cylindrical surface of the sliding rod form a self-locking cavity, a rolling body is placed in the self-locking cavity, and the width of the self-locking cavity gradually decreases from top to bottom, thereby preventing the rolling body from rolling to the bottom of the self-locking cavity.

[0007] In the sensor pressurizing jig as described above, the rolling body is a sphere.

[0008] In the sensor pressurizing fixture as described above, the accommodating groove is an annular groove surrounding the sliding rod, and the self-locking cavity is an annular cavity.

[0009] In the sensor pressurizing fixture as described above, the locking sleeve is provided with a plurality of top ball spring members, and the top of the slide rod is provided with a ball limiting groove for the top ball of the top ball spring member to enter.

[0010] In the sensor pressurizing jig as described above, the pressing plate group includes at least two pressing plates, and two adjacent pressing plates are provided with silicone pads on surfaces close to each other.

[0011] As for the sensor pressurizing jig as described above, the pressure-maintaining mechanism further includes an upper clamping plate and a lower clamping plate slidably connected to the slide rod, and the elastic member is arranged between the upper clamping plate and the lower clamping plate.

[0012] In the sensor pressurizing fixture as described above, silicone pads are provided on both upper and lower surfaces of the pressing plate, a silicone pad is provided on the upper surface of the bottom plate, the pressure maintaining mechanism is located above the pressing plate group, and a silicone pad is provided on the lower surface of the lower clamping plate.

[0013] As described above, the sensor pressurizing fixture, the locking sleeve is composed of a base, a middle seat and a top seat, the middle part of the middle seat is provided with a through hole whose diameter gradually decreases from top to bottom, and the upper surface of the base, the inner wall of the through hole and the lower surface of the top seat form the accommodating groove.

[0014] In the sensor pressurizing jig as described above, a limiting member is provided on the top of the slide rod for preventing the locking sleeve from escaping upwards.

[0015] Compared with the prior art, the utility model has the following advantages:

[0016] The sensor pressurizing jig of the utility model disclosed in this patent can realize the same pressure on the sensor in each layer of the jig. The one-way locking sleeve with innovative design has less resistance when moving downward and greater resistance when moving upward. This feature can be used to achieve one-way locking, that is, only allow the locking sleeve to move downward, so that the pressure on the sensor patch surface of each layer is equal and can be maintained for a long time, thereby reducing the labor intensity of workers, improving work efficiency, and the force applied by the patch is more uniform, thereby improving the stability of product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the sensor pressurizing fixture of the utility model in use;

[0018] Figure 2 It is a schematic three-dimensional diagram of the sensor pressurizing fixture of the utility model;

[0019] Figure 3 It is an exploded schematic diagram of the sensor pressurizing fixture of the utility model;

[0020] Figure 4It is a partial cross-sectional view of the sensor pressurizing fixture of the utility model;

[0021] Figure 5 It is an exploded schematic diagram of the locking sleeve of the utility model. DETAILED DESCRIPTION

[0022] The utility model is further described below in conjunction with the accompanying drawings:

[0023] The directions described in the utility model specification, such as "up", "down", "left", "right", "front", "back", etc., are based on the directions of the drawings and are intended to facilitate the description of the relationship between the various components. They do not indicate the unique or absolute positional relationship between the various components. They are only one of the implementation methods of the utility model and are not a limitation on its implementation method.

[0024] like Figure 1 As shown, sensor pressurizing jig A is used on pressurizing machine B.

[0025] In this embodiment, a sensor pressurizing fixture is provided, such as Figure 2 As shown, the fixture includes a bottom plate 1, on which a slide bar 2 is provided, on which a pressure plate group 3, a pressure-maintaining mechanism 4 and a locking sleeve 5 are slidably connected. In this embodiment, two slide bars 2 are provided on the bottom plate 1, and the pressure plate group 3, the pressure-maintaining mechanism 4 and the locking sleeve 5 are all simultaneously sleeved on the two slide bars 2. Of course, one, three or more slide bars 2 can also be provided, as long as the pressure plate group 3, the pressure-maintaining mechanism 4 and the locking sleeve 5 can slide on the slide bars 2. Figure 2 and Figure 3 As shown, the locking sleeve 5 is located above the pressure plate group 3 and the pressure holding mechanism 4, so that when the locking sleeve 5 slides downward, the pressure plate group 3 and the pressure holding mechanism 4 can be pressed toward the bottom plate 1. The pressure plate group 3 includes a plurality of pressure plates 31 slidably connected to the slide rod 2. The pressure holding mechanism 4 includes an elastic member 41 that can be compressed and deformed when the locking sleeve 5 slides downward, and then store energy. The elastic member 41 can be a spring, and the spring sleeve can be arranged on the slide rod 2. Of course, the elastic member 41 can also be an air spring, a spring sheet, a rubber block or other parts with elastic energy storage function, as long as the two ends of the elastic member 41 can respectively abut against the pressure plate group 3 and the locking sleeve 5, or respectively abut against the pressure plate group 3 and the bottom plate 1. In the present embodiment, the pressure holding mechanism 4 also includes an upper clamping plate 42 and a lower clamping plate 43 slidably connected to the slide rod 2. The elastic member 41 is arranged between the upper clamping plate 42 and the lower clamping plate 43. The elastic member 41 adopts a spring and its two ends are respectively connected to the upper clamping plate 42 and the lower clamping plate 43. like Figure 4 and Figure 5As shown, the locking sleeve 5 is provided with a receiving groove 50 surrounding the sliding rod 2, and the groove wall of the receiving groove 50 and the cylindrical surface of the sliding rod 2 form a self-locking cavity 6, and a rolling body 51 is placed in the self-locking cavity 6. The rolling body 51 generally adopts a sphere, such as a metal ball or a metal bead. Of course, a regular polyhedron can also be adopted, and the width of the self-locking cavity 6 gradually decreases from top to bottom to prevent the rolling body 51 from rolling to the bottom of the self-locking cavity 6, that is, the width distance H between the groove bottom wall 501 of the receiving groove 50 and the cylindrical surface of the sliding rod 2, the width distance H gradually decreases from top to bottom until it can prevent the rolling body 51 from rolling to the bottom of the self-locking cavity 6, so that when the locking sleeve 5 has a relative position to the sliding rod 2 When there is a tendency to slide upward, the rolling body 51 falls downward due to its own gravity, so that the rolling body 51 respectively abuts against the bottom wall 501 of the accommodating groove 50 and the cylindrical surface of the slide rod 2. At this time, if the locking sleeve 5 has a tendency to slide upward, the rolling body 51 is squeezed by the bottom wall 501 of the accommodating groove 50 and the cylindrical surface of the slide rod 2, so that the resistance that the rolling body 51 needs to overcome when rolling is greatly increased, and then the resistance of the locking sleeve 5 sliding upward is also increased, thereby preventing the locking sleeve 5 from sliding upward; when the locking sleeve 5 needs to slide upward, it only needs to turn the pressurizing fixture upside down so that the rolling body 51 rolls to the top of the self-locking cavity 6 with a larger width distance H, so that the locking sleeve 5 can slide upward. When in use, the parts for manufacturing the sensor are first placed between the two pressing plates 31, and the parts include patch glue, aluminum elastomer, strain gauge, etc., and the sensor elements are pressed by a pressurizing machine B or other pressurizing equipment or manually, and the locking sleeve 5 is slid downward, thereby applying a certain pressure to the parts. After a certain pressure is applied, the elastic member 41 of the pressure-maintaining mechanism 4 is compressed and stored, and the locking sleeve 5 is locked due to the large resistance to sliding up and down, so that the entire sensor pressurizing jig is maintained, and the pressure between the two pressing plates 31 is maintained in a relatively stable state due to the pressure-maintaining mechanism 4. The pressurizing jig disclosed in this patent can realize that the sensor is subjected to the same pressure in each layer of the jig. By using this innovatively designed one-way locking sleeve, the resistance is small when it moves downward and large when it moves upward. By using this characteristic, one-way locking can be achieved, that is, only the locking sleeve is allowed to move downward, so that the pressure on the sensor patch surface of each layer is equal and can be maintained for a long time, thereby reducing the labor intensity of workers, high work efficiency, and the force applied by the patch is more uniform, improving the stability of product quality.

[0026] As a preferred solution of this embodiment, Figure 4 and Figure 5 As shown, the receiving groove 50 is an annular groove surrounding the slide rod 2, and the self-locking cavity 6 is an annular cavity. Of course, the self-locking cavity 6 can also be a semi-annular cavity or a fan-shaped cavity.

[0027] As a preferred solution of this embodiment, Figures 2 to 4As shown, the locking sleeve 5 is provided with a plurality of top ball spring members 52, and the top of the slide rod 2 is provided with a ball limiting groove 21 for the top ball of the top ball spring member 52 to enter. The top ball spring member 52 generally includes a spring sleeve 521, a top ball 522 and a top ball spring 523 resting therebetween, so that the locking sleeve 5 can be moved to a position corresponding to the ball limiting groove 21, so that the locking sleeve 5 is temporarily locked in this position, and when the locking sleeve 5 is not required to slide downward, the locking sleeve 5 is prevented from sliding downward under the action of its own gravity.

[0028] As a preferred solution of this embodiment, Figure 2 and Figure 3 As shown, the pressure plate group 3 includes at least two pressure plates 31. Two adjacent pressure plates 31 are provided with silicone pads 7 on surfaces close to each other. The silicone pads 7 are adhered to the pressure plates 31. In this way, it is only necessary to put the aluminum elastomer and the strain gauge between the silicone pads 7 of the two pressure plates 31. After high temperature and pressurization, the silicone pads 7 bond the aluminum elastomer and the strain gauge to form a finished product, saving the work of manually adding the silicone pads 7.

[0029] As a preferred solution of this embodiment, Figure 2 and Figure 3 As shown, in order to add more parts workstations, silicone pads 7 are provided on the upper and lower surfaces of the pressing plate 31, the upper surface of the base plate 1 is provided with a silicone pad 7, the pressure holding mechanism 4 is located above the pressing plate group 3, and the lower surface of the lower clamping plate 43 is provided with a silicone pad 7, so that aluminum elastomers and strain gauges can also be placed between the pressing plate 31 located at the bottom layer and the base plate 1, and aluminum elastomers and strain gauges can also be placed between the pressing plate 31 located at the top layer and the lower clamping plate 43, so as to improve manufacturing efficiency.

[0030] In detail, Figure 4 and Figure 5 As shown, the locking sleeve 5 is composed of a base 53, a middle seat 54 and a top seat 55. A through hole 541 with a diameter gradually decreasing from top to bottom is provided in the middle of the middle seat 54. The upper surface of the base 53, the inner wall of the through hole 541 and the lower surface of the top seat 55 form the accommodating groove 50.

[0031] As a preferred solution of this embodiment, Figure 2 and Figure 3 As shown, a limiter 7 is provided on the top of the slide bar 2 for preventing the locking sleeve 5 from slipping out upwards. The limiter can be a general bolt, which is threadedly connected to the top of the slide bar 2. The size of the bolt head can be larger than the axial hole size of the locking sleeve 5.

[0032] The above is only an embodiment of the utility model, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A sensor pressurizing fixture, characterized in that: The invention comprises a bottom plate (1), a slide bar (2) being provided on the bottom plate (1), a pressure plate group (3), a pressure-maintaining mechanism (4) and a locking sleeve (5) being slidably connected to the slide bar (2), the locking sleeve (5) being located above the pressure plate group (3) and the pressure-maintaining mechanism (4), so that when the locking sleeve (5) slides downward, the pressure plate group (3) and the pressure-maintaining mechanism (4) can be pressed toward the bottom plate (1), the pressure plate group (3) comprises a plurality of pressure plates (31) slidably connected to the slide bar (2), the pressure-maintaining mechanism (4) comprises an elastic member (41) which can be deformed by pressure and store energy when the locking sleeve (5) slides downward, the locking sleeve (5) is provided with a receiving groove (50) surrounding the sliding rod (2), the groove wall of the receiving groove (50) and the cylindrical surface of the sliding rod (2) form a self-locking cavity (6), a rolling body (51) is placed in the self-locking cavity (6), and the width of the self-locking cavity (6) gradually decreases from top to bottom to prevent the rolling body (51) from rolling to the bottom of the self-locking cavity (6).

2. The sensor pressurizing jig according to claim 1, characterized in that: The rolling body (51) is a sphere.

3. The sensor pressurizing jig according to claim 1, characterized in that: The accommodating groove (50) is an annular groove surrounding the sliding rod (2), and the self-locking cavity (6) is an annular cavity.

4. The sensor pressurizing jig according to claim 1, characterized in that: The locking sleeve (5) is provided with a plurality of top ball spring components (52), and the top of the slide rod (2) is provided with a ball limiting groove (21) for the top ball of the top ball spring component (52) to enter.

5. The sensor pressurizing jig according to claim 1, characterized in that: The pressing plate group (3) comprises at least two pressing plates (31), and two adjacent pressing plates (31) are provided with silicone pads (7) on surfaces close to each other.

6. The sensor pressurizing jig according to claim 5, characterized in that: The pressure-maintaining mechanism (4) further comprises an upper clamping plate (42) and a lower clamping plate (43) which are slidably connected to the slide rod (2), and the elastic member (41) is arranged between the upper clamping plate (42) and the lower clamping plate (43).

7. The sensor pressurizing jig according to claim 6, characterized in that: The upper and lower surfaces of the pressure plate (31) are both provided with silicone pads (7), the upper surface of the base plate (1) is provided with a silicone pad (7), the pressure-maintaining mechanism (4) is located above the pressure plate group (3), and the lower surface of the lower clamping plate (43) is provided with a silicone pad (7).

8. The sensor pressurizing jig according to claim 2, characterized in that: The locking sleeve (5) is composed of a base (53), a middle seat (54) and a top seat (55); a through hole (541) whose diameter gradually decreases from top to bottom is provided in the middle of the middle seat (54); the upper surface of the base (53), the inner wall of the through hole (541) and the lower surface of the top seat (55) form the accommodating groove (50).

9. The sensor pressurizing jig according to claim 1, characterized in that: A limiting member (8) is provided at the top of the slide rod (2) for preventing the locking sleeve (5) from slipping out upwards.

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