Torque testing device

Abstract

The utility model discloses a torque testing device which comprises a bottom frame, a bearing frame fixedly connected to the upper surface of the bottom frame, a transmission mechanism arranged above the bottom frame, a torque sensor fixedly installed on the upper surface of the bottom frame, a test piece placed above the bottom frame, a first coupler arranged above the bottom frame, and a clamping mechanism arranged above the bottom frame. By arranging the transmission mechanism, the torque can be efficiently amplified under the condition that a power source is not changed by utilizing a special transmission structure of a planetary gear set in the transmission mechanism, the amplified torque is transmitted to a test piece through the torque sensor and the first coupler in sequence, and the torque sensor monitors in real time and feeds back and outputs a torque value. Therefore, the testing device can simulate various different torque working conditions to test the test piece, the transmission efficiency is improved and can reach more than 90%, meanwhile, the energy loss is effectively reduced, the equipment operation cost is reduced, the energy utilization rate is improved, and the testing requirements of high precision and wide range can be met.

Description

Technical Field

[0001] This utility model relates to the field of mechanical transmission technology, and in particular to a torque testing device. Background Technology

[0002] With the increasing demands of modern industry on the performance of mechanical transmission systems, torque testing devices are being used more and more widely in the fields of automobiles, aerospace, and rail transportation. These devices are mainly used to simulate torque loading under different working conditions to verify the strength, durability, and reliability of the tested components. They are key equipment for product development and quality control.

[0003] Traditional torque testing devices typically use multi-stage reduction mechanisms to amplify torque, but these mechanisms have significant drawbacks. Multi-stage reduction mechanisms require multiple transmission chains such as gears or worm gears to transmit torque, resulting in low transmission efficiency, usually below 70%, high energy loss, and complex and bulky structures, making them difficult to adapt to high-precision and wide-range testing requirements, thus having certain shortcomings. Utility Model Content

[0004] The problem this invention aims to solve is to provide a torque testing device that features efficient transmission, compact structure, and wide testing range.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a torque testing device, including a base frame, a support frame fixedly connected to the upper surface of the base frame, a transmission mechanism provided above the base frame, a torque sensor fixedly installed on the upper surface of the base frame, a test piece placed above the base frame, a coupling provided above the base frame, a clamping mechanism provided above the base frame, and a limit groove formed on the upper surface of the base frame.

[0006] Preferably, in the torque testing device described above, the transmission mechanism includes a motor fixedly mounted on the outer surface of the support frame, a rotating shaft is fixedly connected to the output end of the motor, a coupling is provided at the end of the rotating shaft away from the motor, and a rotating shaft is fixedly connected inside the coupling.

[0007] Preferably, in the torque testing device described above, a sun gear is fixedly connected to the end of the second rotating shaft away from the second coupling, three planet gears are meshed on the outer surface of the sun gear, a connecting frame is fixedly connected to the outer surface of the planet gears, an output shaft is fixedly connected to the end of the connecting frame away from the planet gears, and the end of the output shaft away from the connecting frame is fixedly connected to the input end of the torque sensor.

[0008] Preferably, in the torque testing device described above, the outer surface of the planetary gear is meshed with a gear ring, and the bottom surface of the gear ring is fixedly connected to the upper surface of the base frame.

[0009] Preferably, in the torque testing device described above, the clamping mechanism includes a bidirectional lead screw rotatably connected to the inner wall of the base frame, and a crank handle is fixedly connected to the outer surface of the bidirectional lead screw.

[0010] Preferably, in the torque testing device described above, the outer surface of the bidirectional lead screw is threaded with two mutually symmetrical clamping plates, and the outer surface of the clamping plates is slidably connected to the inner wall of the limiting groove.

[0011] The advantages and beneficial effects of this utility model are as follows: By setting up a transmission mechanism, this utility model can utilize the special transmission structure of its internal planetary gear set to achieve efficient torque amplification without changing the power source. The amplified torque is transmitted to the test piece sequentially through the torque sensor and coupling. The torque sensor monitors and feeds back the output torque value in real time. This not only enables the testing device to simulate various different torque conditions to test the test piece, improving the transmission efficiency to over 90%, but also effectively reduces energy loss, reduces equipment operating costs, and improves energy utilization, thus meeting the needs of high-precision and wide-range testing. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a top view of the structure of this utility model;

[0014] Figure 3 This is a schematic diagram of the transmission mechanism of this utility model;

[0015] Figure 4 This is a schematic diagram of the clamping mechanism of this utility model.

[0016] In the diagram: 1. Base frame; 2. Bearing frame; 3. Transmission mechanism; 301. Motor; 302. Shaft 1; 303. Coupling 2; 304. Shaft 2; 305. Sun gear; 306. Planet gears; 307. Connecting frame; 308. Output shaft; 309. Gear ring; 4. Torque sensor; 5. Coupling 1; 6. Test piece; 7. Clamping mechanism; 701. Handle; 702. Double-acting lead screw; 703. Clamping plate; 8. Limiting groove. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0018] like Figures 1 to 4 As shown, a torque testing device includes a base frame 1, which is typically made of high-strength cast iron and is designed as a plate with a certain thickness and strength, providing a stable support foundation for the entire device.

[0019] The upper surface of the base frame 1 is fixedly connected to the support frame 2. The support frame 2 is made of high-quality aluminum alloy profile and is tightly connected to the base frame 1 by welding or bolting. Aluminum alloy material has the characteristics of light weight and high strength, which reduces the weight of the entire device while ensuring load-bearing capacity. The support frame 2 has a frame structure and its shape is adapted to the base frame 1, providing a stable installation platform for components such as the transmission mechanism 3.

[0020] A transmission mechanism 3 is provided above the base frame 1.

[0021] The transmission mechanism 3 includes a motor 301 fixedly installed on the outer surface of the support frame 2. The motor 301 is a high-performance DC motor, and its housing is made of aluminum alloy with good heat dissipation, which can effectively reduce the temperature of the motor 301 during operation and ensure the stable operation of the motor 301.

[0022] The output end of motor 301 is fixedly connected to a rotating shaft 302. The rotating shaft 302 is made of high-strength alloy steel and its surface is hardened and ground, giving it high hardness and smoothness, which reduces frictional resistance during rotation.

[0023] A coupling 303 is provided at the end of shaft 302 away from motor 301. The coupling 303 is an elastic coupling, which is composed of a rubber elastic element and a metal connecting part. This coupling can effectively compensate for the possible coaxiality deviation between shaft 302 and shaft 304, avoid unstable transmission and component wear caused by shaft misalignment, and ensure stable torque transmission.

[0024] The internal fixed connection of the coupling 303 is the rotating shaft 304, which is also made of high-strength alloy steel. It works in conjunction with the rotating shaft 302 to transmit the power of the motor to the subsequent components.

[0025] The end of the rotating shaft 304 away from the coupling 303 is fixedly connected to the sun gear 305. The sun gear 305 is forged from high-quality alloy steel, and the tooth surface is carburized and quenched, which makes it hard and wear-resistant.

[0026] The outer surface of the sun gear 305 is meshed with three planet gears 306. The planet gears 306 are also made of the same alloy steel and are evenly distributed around the sun gear 305. This layout allows the load to be evenly distributed to each planet gear 306, improving the load-bearing capacity and stability of the transmission mechanism 3.

[0027] The outer surface of the planetary gear 306 is fixedly connected to the connecting frame 307, which is generally made of high-strength aluminum alloy by die casting, and has good structural strength and lightweight characteristics.

[0028] The end of the connecting frame 307 away from the planetary gear 306 is fixedly connected to the output shaft 308. The output shaft 308 is also made of high-strength alloy steel, and its diameter is carefully designed to ensure sufficient strength to transmit the amplified torque. The end of the output shaft 308 away from the connecting frame 307 is fixedly connected to the input end of the torque sensor 4, so that the output torque value can be measured in real time.

[0029] The outer surface of the planetary gear 306 is also meshed with a gear ring 309. The gear ring 309 is made of wear-resistant alloy steel, and its bottom surface is fixedly connected to the upper surface of the base frame 1 by bolts. The gear ring 309 provides a stable meshing track for the planetary gear 306. Together with the sun gear 305 and the planetary gear 306, it forms a planetary gear transmission system to realize the torque amplification function.

[0030] A torque sensor 4 is fixedly installed on the upper surface of the base frame 1. The torque sensor 4 is a high-precision strain gauge sensor, which has the characteristics of high accuracy and fast response speed. It can accurately measure the torque transmitted by the output shaft 308 and convert the torque signal into an electrical signal output.

[0031] Test piece 6 is placed on top of base frame 1. Test piece 6 can be replaced according to different test requirements. Coupling 5 is set on top of base frame 1. Coupling 5 is used to connect output shaft 308 and test piece 6. It can be a rigid coupling to ensure efficient torque transmission, reduce torque loss, and ensure that test piece 6 can accurately withstand the amplified torque.

[0032] A clamping mechanism 7 is provided above the base frame 1.

[0033] The clamping mechanism 7 includes a bidirectional lead screw 702 rotatably connected to the inner wall of the base frame 1. The bidirectional lead screw 702 is made of high-strength stainless steel and its surface is precision ground, resulting in high thread accuracy.

[0034] A crank handle 701 is fixedly connected to the outer surface of the two-way lead screw 702. The crank handle 701 is made of ergonomically designed plastic material, which is convenient for operators to hold and apply force.

[0035] The outer surface of the bidirectional lead screw 702 is threaded with two symmetrical clamping plates 703. The clamping plates 703 are generally made of carbon steel. The surface of the clamping plates 703 that contacts the test piece 6 is treated to increase friction, which can more firmly clamp the test piece 6. The outer surface of the clamping plates 703 is slidably connected to the inner wall of the limiting slide groove 8. The limiting slide groove 8 is opened on the upper surface of the base frame 1 and is made of stainless steel. Its shape is a long strip groove. This structural design allows the clamping plates 703 to move smoothly along the limiting slide groove 8 under the drive of the bidirectional lead screw 702, so as to achieve precise clamping and loosening of the test piece 6, ensure the stability of the position of the test piece 6 during the test, and improve the accuracy of the test.

[0036] Working principle: When torque testing is required on test piece 6, the double-acting lead screw 702 is first rotated by the crank handle 701. The double-acting lead screw 702 drives the clamping plate 703 to move along the limiting slide groove 8, clamping and fixing the test piece 6. After starting the motor 301, the output torque of the motor 301 is transmitted to the second shaft 304 through the first shaft 302 and the second coupling 303, driving the sun gear 305 to rotate. The sun gear 305 meshes with three planet gears 306. The planet gears 306 revolve and rotate under the constraint of the gear ring 309. The revolution of the planet gears 306 drives the output shaft 308 to rotate through the connecting bracket 307, thereby transmitting the torque input from the sun gear 305. The torque is amplified and output through the transmission ratio i=1+Z3 / Z1 of the planetary gear set, where Z3 is the number of teeth on the ring gear 309 and Z1 is the number of teeth on the sun gear 305. The amplified torque is transmitted to the test piece 6 through the output shaft 308, the torque sensor 4, and the coupling 5. The torque sensor 4 monitors and provides feedback on the output torque value in real time. After the test is completed, the handle 701 is turned in the opposite direction to loosen the clamp 703, and the test piece 6 can be replaced. Throughout the process, the symmetrical layout of the planetary gear set ensures uniform load distribution, effectively reducing vibration and noise. At the same time, by adjusting the fixed state of the ring gear 309 or the tooth ratio, it can flexibly adapt to the test requirements of different torque ranges.

[0037] In the description of this utility model, it should be understood that the terms "upper," "lower," "left," and "right," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on this utility model. Furthermore, "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "multiple" means two or more.

[0038] It should be noted that all standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, which will not be described in detail here.

[0039] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A torque testing device, characterized by: The application relates to a torque testing device, which comprises a chassis (1), the upper surface of the chassis (1) is fixedly connected with a bearing frame (2), a transmission mechanism (3) is arranged above the chassis (1), a torque sensor (4) is fixedly installed on the upper surface of the chassis (1), a test piece (6) is placed above the chassis (1), a shaft coupling (5) is arranged above the chassis (1), a clamping mechanism (7) is arranged above the chassis (1), and a limiting sliding groove (8) is formed in the upper surface of the chassis (1). The transmission mechanism (3) comprises a motor (301) fixedly installed on the outer surface of the bearing frame (2), the output end of the motor (301) is fixedly connected with a rotating shaft (302), the rotating shaft (302) is provided with a shaft coupling (303) at the end away from the motor (301), and the shaft coupling (303) is fixedly connected with a rotating shaft (304) in the inside. The rotating shaft (304) is fixedly connected with a sun gear (305) at the end away from the shaft coupling (303), the outer surface of the sun gear (305) is meshingly connected with three planetary gears (306), the outer surface of the planetary gears (306) is fixedly connected with a connecting frame (307), the connecting frame (307) is fixedly connected with an output shaft (308) at the end away from the planetary gears (306), and the output shaft (308) is fixedly connected with the input end of the torque sensor (4) at the end away from the connecting frame (307). The outer surface of the planetary gear (306) is meshingly connected with a gear ring (309), and the bottom surface of the gear ring (309) is fixedly connected with the upper surface of the chassis (1).

2. The torque testing device of claim 1, wherein: The clamping mechanism (7) comprises a bidirectional screw rod (702) rotatably connected with the inner wall of the chassis (1), and the outer surface of the bidirectional screw rod (702) is fixedly connected with a rocking handle (701).

3. A torque testing device according to claim 2, wherein: The outer surface of the bidirectional screw rod (702) is threadedly connected with two symmetrical clamping plates (703), and the outer surface of the clamping plate (703) is slidably connected with the inner wall of the limiting sliding groove (8).

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