Locked-rotor and calibration device of large-torque sensor for test bench

Abstract

The invention provides a locked-rotor and calibration device of a large torque sensor for a test bench, which is characterized in that the locked-rotor and calibration device comprises a bench dynamometer, a shafting equipment protection cover, a torque flange, an adapter flange and a calibration arm which are connected in sequence, the side surface of the adapter flange is provided with a locked-rotor device, and the torque sensor is arranged between the adapter flange and the calibration arm; a calibration tension applying device is arranged on the side surface of the calibration arm; a limiting groove used for locked-rotor is formed in the side face of the adapter flange, the locked-rotor device comprises a locked-rotor block and a rotating piece, and the locked-rotor block is pushed to be matched with the limiting groove through rotation of the rotating piece. Safety limiting is achieved by screwing a set screw, operation is easy and safe, and time and labor are saved.

Description

Technical Field

[0001] The present invention relates to a test bench stall and large torque calibration device, which is suitable for various test bench shaft parts stall and application scenarios requiring torque calibration, including but not limited to engine benches, motor benches, vehicle test benches, drive axle test benches and other fields. The device is overall safe, efficient and low-cost, and can be used in various stall and large torque calibration occasions. Background Art

[0002] Traditional stalling mostly adopts a bolt and slider design. Although the hardware cost is low, the operation is slightly complicated. It requires removing the peripheral shaft system protection cover, loosening the slider limit bolt, moving the slider to contact the stall plate, installing the positioning bolts, installing the protective cover, etc.

[0003] In addition, the calibration of traditional torque sensors is usually done with weight plates for small torques (less than 3000Nm). For large torques (≥5000Nm), the calibration with weights requires the manufacture of a large number of weights, which require multiple people to carry out, which is time-consuming and labor-intensive. The whole process is subject to the risk of weights falling and injuring operators. For large torque calibration, a longer calibration arm needs to be processed, which is usually 2 to 4 meters in total. For some laboratories with smaller spaces, it is impossible to unfold it and the weight calibration cannot be implemented. At present, the most commonly used method for large torque calibration is to use tension and pressure sensors for calibration. Most of them use hydraulic systems to provide tension and pressure, and use shorter calibration arms to achieve torque calibration. Although this method solves the problem of large torque calibration very well, it has obvious disadvantages. It needs to be equipped with a complex hydraulic system, which is costly, inconvenient to install on site, and prone to oil leakage. Since the hydraulic system is sensitive to temperature, hydraulic oil cleanliness, and pressure fluctuations, the hydraulic system has a slow dynamic response and poor control accuracy of the calibrated tension and pressure. Therefore, it has certain limitations and may not be applicable to some applications or equipment with higher requirements. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention proposes a locking and calibration device for a large torque sensor for a test bench. The locking design of the present invention replaces the above complicated operations with a knob. The locking disk limit and free state can be achieved only by manually rotating the knob. A safety limit is achieved by tightening a set screw. The operation is simple, safe, time-saving and labor-saving. A standard screw machine is used to replace a complex hydraulic system. The screw machine can be reasonably selected according to different calibration torque requirements. Only the handwheel is turned to provide pulling force, which is convenient for installation and operation, safe and efficient, and reduces the procurement and use and maintenance costs.

[0005] To achieve the above object, the present invention provides the following technical solutions: A locking and calibration device for a large torque sensor for a test bench, comprising a bench dynamometer, a shaft equipment protection cover, a torque flange, an adapter flange and a calibration arm connected in sequence, wherein a locking device is arranged on the side of the adapter flange, and a torque sensor is arranged between the adapter flange and the calibration arm; a calibration tension applying device is arranged on the side of the calibration arm; a limiting groove for locking is arranged on the side of the adapter flange, and the locking device comprises a locking block and a rotating part, and the locking block is pushed to cooperate with the limiting groove through the rotation of the rotating part.

[0006] As a further solution of the present invention, the blocking device also includes a hollow shaft, a fully threaded stud and a blocking support. The hollow shaft and the fully threaded stud are threadedly matched, the blocking support and the blocking block are limited by grooves, the blocking block is placed in a sunken groove of the blocking support, and moves left and right along the length of the stud. The fully threaded stud and the blocking block are fixedly connected, and one end of the hollow shaft is fixedly connected to the rotating part.

[0007] As a further solution of the present invention, the blocking device also includes a locking screw, a deep groove ball bearing, a bearing seat, a bearing cover and a cover bolt. The locking screw is used to pass through the upper and lower ends of the hollow shaft to limit and fix the full-threaded stud; the deep groove ball bearing is used to limit the other end of the hollow shaft, and the bearing seat, bearing cover and cover bolt are used to fix the blocking device to the blocking support of the shaft system equipment.

[0008] As a further solution of the present invention, the calibration tension applying device includes an H-shaped connector, a tension pressure sensor, a bearing pull rod, a pin shaft, a rotating wheel and a base connected in sequence, and the upper end of the H-shaped connector is connected to the side of the calibration arm.

[0009] As a further solution of the present invention, a level bubble is provided on the calibration arm for calibrating the level of the calibration arm.

[0010] As a further solution of the present invention, a limiting groove is respectively provided on both sides of the adapter flange, and a corresponding blocking device is respectively provided.

[0011] As a further solution of the present invention, calibration tension applying devices are respectively provided on both sides of the calibration arm.

[0012] The present invention has the following beneficial effects: 1. The present invention improves the stall module, does not need to remove the protective cover, does not need to tighten multiple bolts, makes its operation more convenient, saves time, and solves the problem that traditional stalls mostly use bolts and sliders. Although the hardware cost is low, the operation is slightly complicated, and it is necessary to remove the peripheral shaft system protective cover, loosen the slider limit bolts, move the slider to contact the stall disk, install the positioning bolts, install the protective cover, etc. The present invention can greatly improve the efficiency of calibration through a simple structural design.

[0013] 2. The calibration arm structure is optimized and a level bubble is integrated to facilitate leveling without the need for additional tools such as a level ruler.

[0014] 3. Use standard screw machine instead of complex hydraulic system. According to different calibrated torque requirements, you can reasonably select the screw machine. Only the hand wheel needs to be turned to provide pulling force, which is convenient for installation and operation, safe and efficient, and reduces the purchase and maintenance costs.

[0015] In order to more clearly illustrate the structural features and effects of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a stereoscopic diagram of a locking and calibration device for a large torque sensor for a test bench mentioned in the present invention.

[0017] Figure 2 It is a structural schematic diagram of the stalling device mentioned in the present invention.

[0018] Figure 3 It is an axial cross-sectional view of a stalling and calibration device for a large torque sensor for a test bench mentioned in the present invention.

[0019] Figure 4 It is a schematic diagram of the main structure of a blocking and calibration device for a large torque sensor for a test bench mentioned in the present invention.

[0020] Figure 5 It is a side view of a locking and calibration device for a large torque sensor for a test bench mentioned in the present invention. DETAILED DESCRIPTION

[0021] The present invention will be further explained below in conjunction with the accompanying drawings and related knowledge, and described clearly and completely. Obviously, the described application is only a part of the embodiments of the present invention, rather than all the embodiments.

[0022] Reference Figure 1 As shown, the present invention provides a blocking and calibration device for a large torque sensor for a test bench, comprising a bench dynamometer 9, a shafting equipment protection cover 10, a torque flange 11, an adapter flange 12 and a calibration arm 14 connected in sequence, and the output shaft of the bench dynamometer 9 is connected to the adapter flange 12 through the torque flange 11; A blocking device is provided on the side of the adapter flange 12, and a torque sensor 5 is provided between the adapter flange 12 and the calibration arm 14; a calibration tension applying device is provided on the side of the calibration arm 14; a limiting groove 25 for blocking is provided on the side of the adapter flange 12, and the blocking device includes a blocking block and a rotating member, and the blocking block is pushed to cooperate with the limiting groove by the rotation of the rotating member. The present invention can quickly block the adapter flange 12 through the blocking block 21 and the rotating member 15. Compared with the prior art, a lot of time for screw installation can be saved during the calibration process, and the adjustment of the blocking can be quickly realized.

[0023] Reference Figure 2 As shown, in the present invention, the blocking device also includes a hollow shaft 17, a full-thread stud 18 and a blocking support 20, the hollow shaft 17 and the full-thread stud 18 are threadedly matched, and the blocking support 20 and the blocking block 21 are limited by a groove. Specifically, the blocking block is placed in the sunken notch of the blocking support, and moves left and right along the length direction of the stud, the full-thread stud 18 and the blocking block 21 are fixedly connected, and one end of the hollow shaft 17 is fixedly connected to the rotating member 15. The present invention can realize the left and right movement of the blocking block 21 by rotating the rotating member 15 through the threaded matching between the hollow shaft 17 and the full-thread stud 18, and then the fixed connection between the full-thread stud 18 and the blocking block 21, and the groove limiting matching between the blocking support 20 and the blocking block 21, and realize the blocking of the transfer flange 12 when it moves to the side close to the transfer flange 12. The design of the blocking structure is ingenious and convenient.

[0024] The stalling device mentioned in the present invention also includes a set screw 16, a bearing seat 22, a bearing gland 23 and a gland bolt 24. The set screw 16 is used to pass through the upper and lower ends of the hollow shaft 17 to limit and fix the full-thread stud 18; the deep groove ball bearing (bearing seat 22) is used to limit the other end of the hollow shaft 17, and the bearing seat 22, the bearing gland 23 and the gland bolt 24 are used to fix the stalling device to the stalling support of the shafting equipment. The present invention uses the set screw 16 to limit and fix the full-thread stud 18 of the stalling device, so as to achieve a more stable stalling device.

[0025] The calibration tension applying device of the present invention comprises an H-shaped connector 8, a tension and pressure sensor 7, a bearing pull rod 6, a pin 4, a rotating wheel 3 and a base 2 which are connected in sequence. The base is located on the equipment installation base platform 1 and is used for equipment installation and fixing. The upper end of the H-shaped connector 8 is connected to the side of the calibration arm 14. In the present invention, the rotating wheel 3 is a finished self-locking lifting screw machine, which is used to provide tension; the output signal line of the tension and pressure sensor 7 is connected to an amplifier for measuring the axial tension value generated by the rotating wheel 3. After the amplifier is connected, the torque value measured is multiplied by the effective length of the force arm on one side of the calibration arm, which can be converted into torque through the bench system.

[0026] The calibration arm 14 of the present invention is provided with a level bubble 13 for calibrating the level of the calibration arm. Specifically, it is connected by bolts. There is a gap between the bolts and the holes. If the bolts are tightened directly, the calibration arm may be tilted. To avoid the calibration arm from tilting, during the installation process, the bolts are loosened, and the position of the bubble in the level bubble 13 is observed to adjust the calibration arm. When the bubble of the calibration arm is in the middle position, the fastening bolts between the level bubble 13 and the calibration arm 14 are tightened to complete the leveling of the calibration arm.

[0027] The adapter flange 12 of the present invention is provided with a limiting groove 5 on both sides, and a corresponding blocking device is provided respectively, so that more stable blocking can be achieved.

[0028] In the present invention, calibration tension applying devices are respectively provided on both sides of the calibration arm 14, so that calibration can be performed in different directions.

[0029] The working process of the present invention is: The principle of blocking: when torque calibration is required, first loosen the set screw 16, manually rotate the part 15 counterclockwise until it stops when there is resistance, and rotate the shaft system parts. If they can continue to rotate, it means that the limit grooves 5 on both sides of the adapter flange 12 are not rotated and aligned. After the shaft system is aligned, the resistance of the rotating part 15 disappears, and the part 15 can be continued to be rotated until the resistance reappears, which means that the blocking block has penetrated into the inside of the adapter flange 12. At this time, tighten the set screw to complete the blocking. The present invention improves the blocking module, does not need to remove the protective cover, and does not need to tighten multiple bolts, making it more convenient to operate and saving time.

[0030] Installation and leveling of the calibration arm: The level bubble 13 and the calibration arm 14 are connected by bolts. There is a gap between the bolts and the holes. If the bolts are tightened directly, the calibration arm may tilt. To avoid the calibration arm from tilting, loosen the bolts during installation and adjust the calibration arm by observing the position of the bubble in the level bubble 13. When the bubble of the calibration arm is in the middle position, tighten the fastening bolts between the level bubble 13 and the calibration arm 14 to complete the leveling of the calibration arm.

[0031] Installation of calibration arm accessories and application of calibration tension: Complete the installation of calibration arm accessories. Pull the supporting electrical circuit of pressure sensor 7 and connect it to the bench system to complete the installation of calibration arm accessories.

[0032] Manually rotate the rotating wheel 3 to ensure that the calibration arm attachment is in a vertical stretched state. At this time, the gantry control computer will display the current tension and converted torque value in real time. Turn the handwheel according to the required torque target value to adjust the tension to the target value. At this time, the application of tension is completed.

[0033] The technical principle of the present invention is described above in combination with the specific embodiments, which are only preferred implementations of the present invention. The protection scope of the present invention is not limited to the above embodiments, and all technical solutions under the idea of ​​the present invention belong to the protection scope of the present invention. Those skilled in the art can think of other specific implementations of the present invention without creative work, and these methods will fall within the protection scope of the present invention.

Claims

1. A device for blocking and calibrating a large torque sensor for a test bench, characterized in that: It includes a bench dynamometer, a shaft equipment protection cover, a torque flange, an adapter flange and a calibration arm which are connected in sequence. A locking device is arranged on the side of the adapter flange, and a torque sensor is arranged between the adapter flange and the calibration arm; a calibration tension applying device is arranged on the side of the calibration arm; a limiting groove for locking is arranged on the side of the adapter flange, and the locking device includes a locking block and a rotating part, and the locking block is pushed to cooperate with the limiting groove through the rotation of the rotating part.

2. The device for blocking and calibrating a large torque sensor for a test bench according to claim 1, characterized in that: The blocking device also includes a hollow shaft, a fully threaded stud and a blocking support. The hollow shaft and the fully threaded stud are threadedly matched. The blocking block is placed in a sunken groove of the blocking support and moves left and right along the length of the stud. The fully threaded stud and the blocking block are fixedly connected, and one end of the hollow shaft is fixedly connected to the rotating part.

3. The device for blocking and calibrating a large torque sensor for a test bench as claimed in claim 2, characterized in that: The blocking device also includes a locking screw, a bearing seat, a bearing cover and a cover bolt. The locking screw is used to pass through the hollow shaft, and the upper and lower ends are used to limit and fix the full-threaded stud; the deep groove ball bearing is used to limit the other end of the hollow shaft, and the bearing seat, bearing cover and cover bolt are used to fix the blocking device to the blocking support of the shaft system equipment.

4. The device for blocking and calibrating a large torque sensor for a test bench as claimed in claim 3, characterized in that: The calibration tension applying device comprises an H-shaped connecting piece, a tension pressure sensor, a bearing pull rod, a pin shaft, a rotating wheel and a base which are connected in sequence, and the upper end of the H-shaped connecting piece is connected to the side surface of the calibration arm.

5. The device for blocking and calibrating a large torque sensor for a test bench as claimed in claim 4, characterized in that: The calibration arm is provided with a level bubble for calibrating the level of the calibration arm.

6. The device for blocking and calibrating a large torque sensor for a test bench as claimed in claim 5, characterized in that: A limiting groove is respectively arranged on both sides of the adapter flange, and a blocking device is correspondingly arranged thereon.

7. The device for blocking and calibrating a large torque sensor for a test bench according to claim 6, characterized in that: Calibration tension applying devices are respectively arranged on both sides of the calibration arm.

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