Multi-disc friction loading device

Abstract

The invention relates to the field of performance tests, in particular to a multi-disc friction loading device. The loading device comprises a positioning shaft, a hexagon nut, a compression nut, an inner friction plate, an outer friction plate, a shell, a sliding rack, a guide rail, a gear, a bearing, a rotating shaft, a bottom plate and a supporting assembly.

Description

Technical Field

[0001] The invention relates to the field of performance testing, in particular to a multi-disc friction loading device. Background Art

[0002] Currently, in aircraft control systems, electric mechanisms are used to transmit control commands and drive other components to move. They are also subject to certain loads. Whether the load they can withstand meets the requirements of design and product performance requires load performance testing of the assembled electric mechanisms. However, the manufacturing cycle of test equipment is long and its cost is close to the manufacturing cost of the product. Therefore, a test equipment with a short manufacturing cycle and low cost is needed. Summary of the invention

[0003] The present invention provides a multi-disc friction loading device, which can effectively solve the test requirements for the performance of an electric mechanism in a control system, improve product quality, and play an important role in new product development and small-batch production.

[0004] Technical solution:

[0005] Provided is a multi-disc friction loading device, comprising: a positioning shaft, a hexagonal nut, a clamping nut, an inner friction plate, an outer friction plate, a housing, a sliding rack, a guide rail, a gear, a bearing, a rotating shaft, a bottom plate, and a support assembly;

[0006] The support assembly is installed on the bottom plate, and three arms, high, medium and low, are extended horizontally, and concentric mounting holes are provided in the three arms along the height direction of the support assembly;

[0007] The upper section of the positioning shaft is installed and fixed in the mounting hole of the high support arm; the middle section of the positioning shaft is provided with an external thread, and a hexagonal nut and a compression nut are installed in sequence from top to bottom, and the internal thread of the hexagonal nut matches the external thread; a radial groove is provided on the outer circle of the lower section of the positioning shaft;

[0008] A stepped hole is provided in the shell, the small end of the stepped hole faces downward, and the small end is connected to the upper end of the rotating shaft. A radial groove is provided in the inner arm of the large hole, and the inner friction plate and the outer friction plate are alternately installed in the large hole; the inner ring protrusion of the inner friction plate is installed corresponding to the radial groove to achieve fixed connection, and the outer ring protrusion of the outer friction plate is installed corresponding to the radial groove to achieve fixed connection; bearings are installed in the mounting holes of the middle support arm and the lower support arm, and the two bearings are respectively matched with the two ends of the rotating shaft;

[0009] A gear is installed on the rotating shaft between the two arms; a guide rail for sliding the sliding rack is installed on the bottom plate; the sliding rack is fixedly connected to the output shaft of the motor;

[0010] The sliding rack and gear mesh.

[0011] Further, the loading device also includes: a sensor;

[0012] The sensor is installed between the compression nut and the top inner friction plate to sense the locking force of the hexagonal nut.

[0013] Furthermore, the sensor is also connected to a display for responding to the applied force in real time and converting the force value into a measurable quantity for display.

[0014] Further, the support assembly includes: a support and a bracket;

[0015] The support is an inverted H-shaped structure, the transverse structure serves as the middle support arm and the lower support arm, the structure extending out of the lower support arm is fixedly connected with the longitudinal arm of the support, and the transverse arm at the top of the support serves as the high support arm.

[0016] Furthermore, a V-shaped groove is provided on the lower end surface of the rotating shaft, and a gap exists between the V-shaped groove and the bottom plate, which is supported by the balls.

[0017] Furthermore, a key connection is adopted between the rotating shaft and the gear, which acts as a circumferential fixed gear to transmit rotational motion and torque.

[0018] Furthermore, the number of the outer friction plates and the number of the inner friction plates are 3 each.

[0019] Furthermore, a pressure spring is added between the clamping nut and the positioning shaft, which is used to adjust the pressure and provide a stable supporting force for the clamping nut to alleviate the impact.

[0020] Beneficial effects:

[0021] The present invention provides a multi-disc friction loading device, which has a simple structure, is easy to operate and has a low manufacturing cost. The use of gears and racks greatly improves the transmission efficiency, thereby ensuring product quality and improving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1a is a front view of a multi-disc friction loading device;

[0023] Figure 1b is a top view of a multi-disc friction loading device;

[0024] Figure 2 is a partial cross-sectional view of a multi-disc friction loading device;

[0025] Figure 3a It is a partial schematic diagram of a friction plate loading assembly of a multi-disc friction loading device;

[0026] Figure 3b is a top view of a friction plate loading assembly of a multi-disc friction loading device;

[0027] Figure 4a It is a schematic diagram of the inner friction plate of a multi-disc friction loading device;

[0028] Figure 4b is a side view of an inner friction plate of a multi-disc friction loading device;

[0029] Figure 5a It is a schematic diagram of the outer friction plate of a multi-disc friction loading device;

[0030] Figure 5b is a side view of an outer friction plate of a multi-disc friction loading device;

[0031] Figure 6a is a partial cross-sectional view of a multi-disc friction loading device;

[0032] Figure 6b It is a partial top view of a multi-disc friction loading device. DETAILED DESCRIPTION

[0033] The present invention provides a multi-disc friction loading device, such as Figure 1a-6b As shown, it includes: a cylindrical pin 1, a knurled nut 2, a positioning shaft 3, a hexagonal nut 4, a clamping nut 5, a pressure spring 6, a sensor 7, a washer 8, an inner friction plate 9, an outer friction plate 10, a housing 11, a slotted cylindrical head screw 12, a rubber washer 13, a sliding rack 14, a guide rail 15, a gear 16, a bearing 17, a ball 18, a rotating shaft 19, a key 20, a base plate 21, a support 22, a cylindrical pin 23, a cylindrical head hexagon socket screw 24, and a bracket 25; wherein,

[0034] The positioning shaft 3 is fixedly connected to the bracket 25 by a cylindrical pin 1 and a knurled nut 2 (such as Figure 2 shown);

[0035] A pressure spring 6 (such as Figure 2 As shown), it can be used to adjust the pressure and provide a stable support force for the compression nut 5 to alleviate the impact;

[0036] The three inner friction plates 9 (such as Figure 4a and 4b The three outer friction plates 10 (as shown) are respectively connected to the upper end of the rotating shaft 19 Figure 5a and 5b Cross-stacked (as shown) Figure 3a and 3b As shown), during operation, the inner friction plate 9 and the outer friction plate 10 rub against each other, which can generate a large load;

[0037] A stepped hole is provided in the shell 11, with the small end of the stepped hole facing downward and connected to the upper end of the rotating shaft 19. The inner arm of the large hole is provided with a radial groove, and the inner friction plate 9 and the outer friction plate 10 are alternately installed in the large hole; the inner ring protrusion of the inner friction plate 9 is installed corresponding to the radial groove to achieve a fixed connection, and the outer ring protrusion of the outer friction plate 10 is installed corresponding to the radial groove to achieve a fixed connection; bearings 17 are installed in the mounting holes of the middle support arm and the lower support arm, and the two bearings are respectively matched with the two ends of the rotating shaft 19.

[0038] The upper and lower ends of the support 22 are each equipped with a deep groove ball bearing 17 (such as Figure 2 As shown), the rotating shaft 19 reduces friction, improves the operation efficiency of the machine, and can withstand the combined load of radial and axial forces acting simultaneously;

[0039] The lower end of the rotating shaft 19 is provided with a ball 18 (such as Figure 2 As shown), the pressure generated when the compression nut 5 is twisted prevents the deep groove ball bearing 17 from being pressed out, and the structural design of the ball 18 makes the friction between the rotating shaft 19 and the ball 18 very small when the rotating shaft 19 rotates;

[0040] The rotating shaft 19 and the gear 16 are connected by a key 20 (such as Figure 6a As shown), it acts as a circumferential fixed gear 16 to transmit rotational motion and torque;

[0041] The gear 16 is meshed with the sliding rack 14 (eg Figure 6b As shown), it has high precision, can realize the conversion from rotational motion to linear motion, and can also withstand large loads;

[0042] The sliding rack 14 is used to connect the electric mechanism to be tested. The sliding rack 14 is installed on the guide rail 15 (such as Figure 6a and 6b As shown), it is to ensure that the sliding rack 14 and the connected test electric mechanism obtain accurate linear displacement in a specific direction to prevent the sliding rack 14 from swinging or moving in a directional manner;

[0043] The sensor 7 (such as Figure 2 The force sensor (as shown) is connected to a display and can directly respond to the applied force and convert the force value into a measurable quantity for display.

[0044] The present invention provides a multi-disc friction loading device, which can effectively solve the test requirements for the performance of electric mechanism components in the control system, improve the quality of products, and play an important role in the development of new products and small-batch production.

[0045] The present invention provides a multi-disc friction loading device, such as Figure 1a-6bAs shown, it includes: a cylindrical pin 1, a knurled nut 2, a positioning shaft 3, a hexagonal nut 4, a clamping nut 5, a pressure spring 6, a sensor 7, a washer 8, an inner friction plate 9, an outer friction plate 10, a housing 11, a slotted cylindrical head screw 12, a rubber washer 13, a sliding rack 14, a guide rail 15, a gear 16, a bearing 17, a ball 18, a rotating shaft 19, a key 20, a base plate 21, a support 22, a cylindrical pin 23, a cylindrical head hexagon socket screw 24, and a bracket 25;

[0046] First, connect the electric mechanism to the sliding rack 14 through the slotted cylindrical head screws 12 and the rubber washers 13, and connect the electric mechanism to the connecting holes on the base plate 21 to prevent movement during the test. Then twist the clamping nut 5 to press the sensor 7, washer 8, inner friction plate 9, outer friction plate 10 downward until the required force value is displayed on the display, and then twist the hexagonal nut 4 to lock the clamping nut 5. At this time, turn on the electric mechanism, drive the gear 16, rotating shaft 19 and housing 11 and other components to rotate through the sliding rack 14, and transmit the loading force to the electric mechanism to be tested, so as to simulate the load test.

Claims

1. A multi-disc friction loading device, characterized in that: include: A positioning shaft (3), a hexagonal nut (4), a clamping nut (5), an inner friction plate (9), an outer friction plate (10), a housing (11), a sliding rack (14), a guide rail (15), a gear (16), a bearing (17), a rotating shaft (19), a base plate (21), and a support assembly; The support assembly is mounted on the bottom plate (21) and has three arms extending transversely, namely, high, medium and low arms. The three arms are provided with concentric mounting holes along the height direction of the support assembly. The upper section of the positioning shaft is fixedly installed in the mounting hole of the high support arm; the middle section of the positioning shaft is provided with an external thread, and a hexagonal nut (4) and a clamping nut (5) are installed in sequence from top to bottom, and the internal thread of the hexagonal nut (4) matches the external thread; the outer circle of the lower section of the positioning shaft is provided with a radial groove; A stepped hole is provided in the housing (11), the small end of the stepped hole faces downward and is connected to the upper end of the rotating shaft (19), the inner arm of the large hole is provided with a radial groove, and the inner friction plate (9) and the outer friction plate (10) are alternately installed in the large hole; the inner ring protrusion of the inner friction plate (9) is installed correspondingly to the radial groove to achieve fixed connection, and the outer ring protrusion of the outer friction plate (10) is installed correspondingly to the radial groove to achieve fixed connection; bearings (17) are installed in the installation hole of the middle support arm and the installation hole of the lower support arm, and the two bearings are respectively matched with the two ends of the rotating shaft (19); A gear (16) is installed on the rotating shaft (19) between the two supporting arms; a guide rail (15) for sliding the sliding rack (14) is installed on the bottom plate (21); the sliding rack (14) is fixedly connected to the output shaft of the motor; The sliding rack (14) and the gear (16) are meshed.

2. The loading device according to claim 1, characterized in that: Also includes: Sensor (7); The sensor is installed between the compression nut (5) and the uppermost inner friction plate and is used to sense the locking force of the hexagonal nut (4).

3. The loading device according to claim 2, characterized in that: The sensor is also connected to a display for responding to the applied force in real time and converting the force value into a measurable quantity for display.

4. The loading device according to claim 1, characterized in that: The support assembly comprises: a support (22) and a bracket (25); The support (22) is an inverted H-shaped structure, the transverse structure serves as the middle support arm and the lower support arm, the structure extending out of the lower support arm cooperates with and is fixedly connected to the longitudinal arm of the bracket (25), and the transverse arm at the top of the bracket serves as the high support arm.

5. The loading device according to claim 1, characterized in that: A V-shaped groove is provided on the lower end surface of the rotating shaft (19), and a gap exists between the V-shaped groove and the bottom plate (21), which is supported by the ball bearing (18).

6. The loading device according to claim 1, characterized in that: The rotating shaft (19) is connected to the gear (16) by a key (20), and plays the role of fixing the gear (16) in the circumferential direction to transmit the rotational motion and torque.

7. The loading device according to claim 1, characterized in that: The number of outer friction plates and inner friction plates is 3 each.

8. The loading device according to claim 1, characterized in that: A pressure spring (6) is added between the clamping nut (5) and the positioning shaft (3), which is used to adjust the pressure and provide a stable supporting force for the clamping nut (5) to alleviate the impact.

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