Box type balance protection device

Abstract

The utility model relates to a box type balance protection device, which comprises a balance front protection cover, a balance side protection cover, a balance rear protection cover, a support device and a pin shaft, the balance front protection cover, the balance side protection cover and the balance rear protection cover are connected with a box type balance fixing frame, and the support device is arranged between the balance fixing frame and a floating frame. And pin shafts are used for connection. According to the utility model, adverse effects and even damages on sensitive elements of the box-type balance caused by misoperation in the transportation and storage process are avoided, interference of airflow impurities, dust and the like on sensitive elements such as a bridge in the balance in the test, transportation and storage process of the box-type balance is isolated, and the stability of the box-type balance is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the field of experimental aerodynamics, and in particular relates to a box-type balance protection device. Background Art

[0002] A box balance is a commonly used instrument for measuring force and torque. This type of balance offers the advantages of fast response and a thorough decomposition of force and torque, making it widely used in applications such as wind tunnel force testing. Due to its large size and high weight, box balances often encounter complex load environments during transportation, storage, and installation. During these processes, the balance's elastic elements must be protected to limit excessive load transfer to them. Furthermore, interference with sensitive components such as the bridge due to airflow impurities and dust during testing, transportation, and storage is also necessary. Therefore, a protective device is needed to protect box balances and improve their reliability. Utility Model Content

[0003] The purpose of the utility model is to provide a box-type balance protection device in response to the protection needs of the box-type balance, which can effectively protect the balance elastic elements and improve the reliability of the balance.

[0004] The above-mentioned purpose of the present invention is mainly achieved through the following technical solutions:

[0005] A protective device for a cassette balance comprises a front protective cover, a side protective cover, a rear protective cover, a support device and a pin shaft. The bottom plates of the front protective cover, the side protective cover and the rear protective cover are respectively connected to the lower surface of the cassette balance fixed frame to form a cavity structure. A gap of 2 to 4 mm is reserved between the inner wall surface of the front protective cover and the inner wall surface of the rear protective cover and the two end surfaces of the cassette balance floating frame. A gap of 2 to 4 mm is reserved between the inner wall surface of the side protective cover and the two side surfaces of the cassette balance floating frame. The support device is placed between the cassette balance fixed frame and the cassette balance floating frame and is fixed by a pin shaft to protect the elastic structure of the cassette balance. An interface is provided on the front protective cover of the balance.

[0006] The front protective cover of the balance includes a first upper pressure plate, a first center plate, a first reinforcement block and a first lower pressure plate. The first center plate is located between the first upper pressure plate and the first lower pressure plate. The first upper pressure plate and the first lower pressure plate are parallel. The width of the first lower pressure plate is greater than the width of the first upper pressure plate. A through hole is provided on the first lower pressure plate. The screws fix the front protective cover of the balance to the cassette balance fixing frame through the through hole. A first reinforcement block is provided on the first center plate. The first reinforcement block is stepped. The lower bottom surface of the upper step contacts the upper surface of the cassette balance fixing frame. The interface is provided on the first reinforcement block.

[0007] The side protective cover of the balance includes a second upper pressure plate, a second reinforcement block, a second center plate and a second lower pressure plate. The two side protective covers of the balance are respectively installed on the left and right sides of the cassette balance; the second center plate is located between the second upper pressure plate and the second lower pressure plate, and the second upper pressure plate and the second lower pressure plate are parallel. A through hole is provided on the second lower pressure plate, and screws are used to fix the side protective cover of the balance to the cassette balance fixing frame through the through hole. A second reinforcement block is provided on the second center plate, and two bosses are provided on the second center plate, and the bosses are in contact with the upper surface of the cassette balance fixing frame.

[0008] The second reinforcement block is T-shaped.

[0009] The rear protective cover of the balance includes a third upper pressure plate, a third reinforcement block, a third center plate and a third lower pressure plate. The third center plate is located between the third upper pressure plate and the third lower pressure plate. The third upper pressure plate and the third lower pressure plate are parallel. A through hole is provided on the third lower pressure plate. The screws fix the rear protective cover of the balance to the cassette balance fixing frame through the through hole. The third center plate is provided with a third reinforcement block. The third reinforcement block is a stepped structure. The upper surface of the upper step is provided with a vertical plate, and the vertical plate is perpendicular to the upper surface of the upper step.

[0010] The supporting device is a cylindrical structure, and three coaxial cylindrical through holes of different diameters are sequentially arranged at the center position of the supporting device, namely, an upper matching section, a middle section and a lower matching section. The pin shaft passes through the through hole and matches with the supporting device. The size of the upper matching section is consistent with the size of the circular through hole on the floating frame, and the size of the lower matching section is consistent with the size of the countersunk hole on the fixed frame. The height of the supporting device is consistent with the distance between the inner surfaces of the box-type balance fixed frame and the box-type balance floating frame. The upper end face of the supporting device contacts the box-type balance floating frame, and the lower end face contacts the box-type balance fixed frame.

[0011] The supporting device has a diameter of 30 to 50 mm.

[0012] The pin shaft includes three coaxial cylinders of different diameters: an upper fitting section, a middle section and a lower fitting section. The diameter of the upper fitting section of the pin shaft is consistent with the size of the upper fitting section, the diameter of the lower fitting section of the pin shaft is consistent with the size of the lower fitting section, and the diameter of the middle section of the pin shaft is smaller than the diameter of the upper fitting section of the pin shaft.

[0013] A threaded hole is provided in the matching section on the pin shaft to facilitate removal of the pin shaft.

[0014] The pin shaft is higher than the height of the supporting device, and the upper end surface of the pin shaft is flush with or slightly lower than the upper surface of the box-type balance floating frame.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) The box-type balance protection device of the utility model can effectively protect the balance during transportation, storage and testing, and can isolate the box-type balance from interference and damage to sensitive components such as the bridge in the balance caused by airflow impurities and dust during testing, transportation and storage, thereby improving the stability of the balance.

[0017] (2) The utility model provides a protective device for a cassette balance, and a reserved interface position is provided on the front protective cover of the balance, so that the external leads of the balance can be quickly plugged in and out and stored, which is convenient for transportation and storage of the cassette balance.

[0018] (3) The box-type balance protection device of the present invention is provided with a reinforcing block on the protective cover to prevent the protective cover from being deformed due to its own stress.

[0019] (4) The box-type balance protection device of the utility model has a simple structure, is easy and convenient to operate, has strong applicability, and is easy to disassemble and assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a front cross-sectional view of the box-type balance protection device of the utility model;

[0021] Figure 2 This is a three-dimensional diagram of the box-type balance protection device of the utility model;

[0022] Figure 3 This is a three-dimensional diagram of the front protective cover of the box-type balance protection device of the utility model;

[0023] Figure 4 This is a three-dimensional diagram of the side protection cover of the box-type balance protection device of the utility model;

[0024] Figure 5 This is a three-dimensional diagram of the rear protective cover of the box-type balance protection device of the utility model;

[0025] Figure 6 This is a cross-sectional view of the support device of the box-type balance protection device of the utility model;

[0026] Figure 7 This is a cross-sectional view of the pin shaft of the box-type balance protection device of the utility model. DETAILED DESCRIPTION

[0027] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments:

[0028] like Figure 1 The figure shows the front cross-section of the box balance protection device. Figure 2The figure shows a three-dimensional view of a cassette balance protective device; the device includes a front balance protective cover 1, side balance protective covers 3, rear balance protective cover 5, a support device 2, and a pin 4. The bottom plates of the front balance protective cover 1, side balance protective covers 3, and rear balance protective cover 5 are respectively connected to the lower surface of the cassette balance fixed frame 6, forming a cavity structure. A 2-4 mm gap is reserved between the inner wall of the front balance protective cover 1 and the front end 702 of the cassette balance floating frame 7. A 2-4 mm gap is reserved between the inner wall of the side balance protective cover 3 and the first side 703 and second side 705 of the cassette balance floating frame 7, respectively. A 2-4 mm gap is reserved between the rear balance protective cover 5 and the rear end 704 of the cassette balance floating frame 7. The support device 2 is placed between the cassette balance fixed frame 6 and the cassette balance floating frame 7 and is fixed by the pin 4 to protect the elastic structure of the cassette balance. The front balance protective cover 1 is provided with an aviation plug interface.

[0029] like Figure 3 The figure shows a stereoscopic view of a front protective cover 1 of a box-type balance protection device, wherein the front protective cover 1 of the balance is composed of a first upper pressing plate 101, a first center plate 102, a first reinforcing block 103 and a first lower pressing plate 104. The entire front protective cover 1 of the balance is processed in one piece, the first center plate 102 connects the first upper pressing plate 101 and the first lower pressing plate 104, the first upper pressing plate 101 and the first lower pressing plate 104 are parallel, the first lower pressing plate 104 is provided with a through hole, the front protective cover 1 of the balance is fixed to the box-type balance fixing frame 6 by screws, the first reinforcing block 103 is provided on the first center plate 102 to prevent the front protective cover 1 of the balance from being deformed due to its own stress, and an aviation plug interface position is reserved on the first reinforcing block 103, the external lead of the balance can be quickly plugged in and stored, and the external lead of the balance is prevented from being damaged during transportation and storage; the first reinforcing block 103 is stepped, and the lower bottom surface of the upper step contacts the upper surface of the box-type balance fixing frame (6).

[0030] like Figure 4 The figure shows a three-dimensional view of the side shield 3 of the box-type balance protection device. The structure of the side shield 3 of the balance is similar to that of the front shield 1. It is composed of a second upper pressure plate 301, a second reinforcement block 302, a second center plate 303, and a second lower pressure plate 304. Two need to be processed and installed on the left and right sides of the box-type balance respectively. The second center plate 303 is located between the second upper pressure plate 301 and the second lower pressure plate 304. The second upper pressure plate 301 and the second lower pressure plate 304 are parallel. A through hole is provided on the second lower pressure plate 304. The side shield 3 of the balance is fixed to the box-type balance fixing frame 6 by screws. The second center plate 303 is provided with a second reinforcement block 302. The second reinforcement block 302 is T-shaped to prevent the side shield 3 of the balance from deformation due to its own stress. The second center plate 303 is provided with two bosses, which are in contact with the upper surface of the box-type balance fixing frame 6.

[0031] like Figure 5 The figure shows a three-dimensional view of the rear protective cover 5 of the box-type balance protection device. The structure of the rear protective cover 5 of the balance is similar to that of the front protective cover 1 of the balance. It is composed of a third upper pressure plate 501, a third reinforcement block 502, a third center plate 503 and a third lower pressure plate 504. The third center plate 503 is located between the third upper pressure plate 501 and the third lower pressure plate 504. The third upper pressure plate 501 and the third lower pressure plate 504 are parallel. The third lower pressure plate 504 is provided with a through hole. The rear protective cover 5 of the balance is fixed to the box-type balance fixing frame 6 by screws to prevent the rear protective cover 5 of the balance from being deformed due to its own stress. The third reinforcement block 502 is a stepped structure. The upper surface of the upper step is provided with a vertical plate, and the vertical plate is perpendicular to the upper surface of the upper step.

[0032] Figure 6 The figure shows a cross-sectional view of the support device 2 of the box-type balance protection device. The support device 2 is a cylindrical structure with a diameter within the range of 30 to 50 mm, which can be appropriately adjusted according to the size of the internal space of different box-type balances. The center of the cylinder is provided with three coaxial cylindrical through holes of different diameters, namely an upper mating section 201, a middle section 202, and a lower mating section 203, which are mated with the pin 4. In terms of the selection of the through hole diameter, the size of the upper mating section 201 must be consistent with the size of the circular through hole 701 on the box-type balance floating frame 7, and the size of the lower mating section 203 must be consistent with the size of the countersunk hole 601 on the box-type balance fixed frame 6. The height of the support device 2 is consistent with the distance between the inner surfaces of the corresponding box-type balance fixed frame 6 and the box-type balance floating frame 7. The upper end face contacts the box-type balance floating frame 7, and the lower end face contacts the box-type balance fixed frame 6.

[0033] like Figure 7 The figure shows a cross-sectional view of the pin shaft 4 of the protective device of the box-type balance. The pin shaft 4 comprises three coaxial cylinders of different diameters, namely, the upper matching section 401, the middle section 403 and the lower matching section 404. The lower end face is provided with a chamfer for easy installation. After the pin shaft 4 is installed, the support device 2 can be fixed inside the box-type balance. To achieve this function, the diameter of the upper matching section 401 of the pin shaft is consistent with the size of the circular through hole 701 on the floating frame 7 of the box-type balance, and the diameter of the lower matching section 404 of the pin shaft is consistent with the size of the countersunk hole 6 on the fixed frame 6 of the box-type balance. 01, the diameter of the middle section 403 of the pin needs to be smaller than the diameter of the upper matching section 401 of the pin. When the above size requirements are met, the pin 4 can fix the supporting device 2 between the cassette balance floating frame 7 and the cassette balance fixed frame 6. A threaded hole 402 is provided in the upper matching section 401 of the pin to facilitate the removal of the pin 4. The height of the pin 4 should be higher than the height of the supporting device 2. After installation, the upper end surface of the pin 4 is flush with or slightly lower than the upper surface of the cassette balance floating frame 7.

[0034] The support device 2 is placed in the designed position during the daily storage, transportation and installation of the box balance. Before the test begins, the side protection cover 3 of the balance should be removed, and the pin 4 and the support device 2 should be removed to carry out the test.

[0035] Here's how it works:

[0036] 1. During the transportation, storage and installation of the balance, the support device 2 is installed in the designed position to support the box balance fixed frame 6 and the box balance floating frame 7, protect the balance elastic element, and prevent the elastic element from plastic deformation under overload conditions and causing damage to the balance.

[0037] 2. During the transportation, storage and testing of the balance, the interference of airflow impurities and other factors on the balance components can be isolated to improve the stability of the balance and the test accuracy.

[0038] The contents not described in detail in the specification of this utility model belong to the common knowledge of professionals in this field.

Claims

1. A box-type balance protection device, characterized in that: The invention comprises a front protective cover (1), a side protective cover (3), a rear protective cover (5), a supporting device (2) and a pin (4). The bottom plates of the front protective cover (1), the side protective cover (3) and the rear protective cover (5) are respectively connected to the lower surface of the box-type balance fixed frame (6) to form a cavity structure. The inner wall surfaces of the front protective cover (1) and the rear protective cover (5) are respectively reserved with two end surfaces at both ends of the box-type balance floating frame (7) with a gap of 2 to 4 mm. The inner wall surface of the side protective cover (3) and the two side surfaces of the box-type balance floating frame (7) are respectively reserved with a gap of 2 to 4 mm. The supporting device (2) is placed between the box-type balance fixed frame (6) and the box-type balance floating frame (7) and is fixed by the pin (4) to protect the elastic structure of the box-type balance. An interface is provided on the front protective cover (1).

2. A cassette balance protection device according to claim 1, characterized in that: The front protective cover (1) of the balance comprises a first upper pressing plate (101), a first center plate (102), a first reinforcing block (103) and a first lower pressing plate (104); the first center plate (102) is located between the first upper pressing plate (101) and the first lower pressing plate (104); the first upper pressing plate (101) and the first lower pressing plate (104) are parallel; the width of the first lower pressing plate (104) is greater than the width of the first upper pressing plate (101); a through hole is provided on the first lower pressing plate (104); screws are passed through the through hole to fix the front protective cover (1) of the balance to the box-type balance fixing frame (6); a first reinforcing block (103) is provided on the first center plate (102); the first reinforcing block (103) is stepped; the lower bottom surface of the upper step contacts the upper surface of the box-type balance fixing frame (6); and the interface is provided on the first reinforcing block (103).

3. A cassette balance protection device according to claim 1, characterized in that: The balance side protection cover (3) includes a second upper pressing plate (301), a second reinforcing block (302), a second center plate (303) and a second lower pressing plate (304), and the two balance side protection covers (3) are respectively installed on the left and right sides of the box-type balance; the second center plate (303) is located between the second upper pressing plate (301) and the second lower pressing plate (304), the second upper pressing plate (301) and the second lower pressing plate (304) are parallel, the second lower pressing plate (304) is provided with a through hole, and screws are used to fix the balance side protection cover (3) on the box-type balance fixing frame (6) through the through hole, the second center plate (303) is provided with a second reinforcing block (302), and the second center plate (303) is provided with two bosses, and the bosses are in contact with the upper surface of the box-type balance fixing frame (6).

4. A cassette balance protection device according to claim 3, characterized in that: The second reinforcement block (302) is T-shaped.

5. The cassette balance protection device according to claim 1, characterized in that: The balance rear protective cover (5) comprises a third upper pressing plate (501), a third reinforcing block (502), a third center plate (503) and a third lower pressing plate (504), wherein the third center plate (503) is located between the third upper pressing plate (501) and the third lower pressing plate (504), the third upper pressing plate (501) and the third lower pressing plate (504) are parallel, the third lower pressing plate (504) is provided with a through hole, and screws are used to fix the balance rear protective cover (5) to the box-type balance fixing frame (6) through the through hole, the third center plate (503) is provided with a third reinforcing block (502), the third reinforcing block (502) is a stepped structure, and a vertical plate is provided on the upper surface of the upper step, and the vertical plate is perpendicular to the upper surface of the upper step.

6. A cassette balance protection device according to claim 1, characterized in that: The support device (2) is a cylindrical structure. The center position of the support device (2) is sequentially provided with three coaxial cylindrical through holes of different diameters, namely an upper matching section (201), a middle section (202) and a lower matching section (203). The pin shaft (4) passes through the through hole and matches with the support device (2). The size of the upper matching section (201) is consistent with the size of the circular through hole (701) on the floating frame (7). The size of the lower matching section (203) is consistent with the size of the countersunk hole (601) on the fixed frame (6). The height of the support device (2) is consistent with the distance between the inner surfaces of the box-type balance fixed frame (6) and the box-type balance floating frame (7). The upper end face of the support device (2) contacts the box-type balance floating frame (7), and the lower end face contacts the box-type balance fixed frame (6).

7. A cassette balance protection device according to claim 6, characterized in that: The supporting device (2) has a diameter of 30 to 50 mm.

8. The cassette balance protection device according to claim 6, characterized in that: The pin shaft (4) comprises three coaxial cylinders of different diameters, namely an upper pin shaft fitting section (401), a middle pin shaft section (403) and a lower pin shaft fitting section (404). The diameter of the upper pin shaft fitting section (401) is consistent with the size of the upper pin shaft fitting section (201), the diameter of the lower pin shaft fitting section (404) is consistent with the size of the lower pin shaft fitting section (203), and the diameter of the middle pin shaft section (403) is smaller than the diameter of the upper pin shaft fitting section (401).

9. The cassette balance protection device according to claim 8, characterized in that: A threaded hole (402) is provided in the matching section (401) on the pin shaft to facilitate removal of the pin shaft (4).

10. The cassette balance protection device according to claim 1, characterized in that: The pin shaft (4) is higher than the height of the supporting device (2), and the upper end surface of the pin shaft (4) is flush with or slightly lower than the upper surface of the box-type balance floating frame (7).

Images