A static torque testing device

Abstract

This utility model discloses a static torque testing device, including a fixed base, on which a housing is fixed. A drive shaft is connected to the housing via a backstop. One end of the drive shaft is detachably connected to the test piece, and the other end is detachably connected to a force-applying rod. The length direction of the force-applying rod is perpendicular to the circumferential direction of the drive shaft. Several distance-dividing grooves are formed on the force-applying rod. This utility model has a simple structure, low cost, small footprint, and low testing cost. It can effectively prevent springback during testing, which could make torque difficult to detect, and avoid accidents caused by springback injuring testing personnel.

Description

Technical Field

[0001] This utility model belongs to the field of machinery, and in particular relates to a static torque testing device. Background Technology

[0002] Torque testing utilizes a lever mechanism that converts the weight of an object multiplied by the arm length into torque, transferring the required torque to the load testing end. It features a simple, reliable structure and high safety performance, and is now widely used in various industries. For example, utility model patent 2022222438422 discloses a static torque testing fixture that tests the torque-bearing capacity of internal steel and external nylon components by applying torque to a wrench. However, many test pieces, such as torsion spring structures, have unknown rotational turns to reach maximum torque. After applying a certain torque, the wrench needs to be removed and returned to its original position before applying torque again. Existing torque testing devices cannot prevent the test piece from rebounding, making it difficult for existing static torque testing devices to perform torque testing. This often necessitates dynamic testing structures that are large in footprint and expensive. Therefore, improvements to existing static torque testing devices are needed. Utility Model Content

[0003] To address the aforementioned problems, this utility model discloses a static torque testing device. To achieve the above objective, the technical solution of this utility model is as follows:

[0004] A static torque testing device includes a fixed base, on which a housing is fixed. A drive shaft is connected to the housing via a backstop. One end of the drive shaft is detachably connected to the test piece, and the other end is detachably connected to a force-applying rod. The length direction of the force-applying rod is perpendicular to the circumferential direction of the drive shaft. Several distance dividing grooves are formed on the force-applying rod.

[0005] In a further improvement, the other end of the drive shaft is connected to the force-applying rod via a coupling, a flat key, or a spline.

[0006] In a further improvement, the mounting base is fixed to the ground or tabletop with bolts.

[0007] In a further improvement, both ends of the drive shaft are sealed to the housing via oil seals.

[0008] A further improvement is that the tested component is a speed reducer.

[0009] In a further improvement, there are no fewer than two distance dividing slots, and the interval between adjacent distance dividing slots is the same.

[0010] Advantages of this utility model:

[0011] This invention has a simple structure, low cost, small footprint, and low testing cost. It can effectively prevent springback during the testing process from causing difficulty in detecting torque and avoid accidents that could injure testing personnel due to springback. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0013] Figure 2 This is a cross-sectional structural diagram of the present utility model;

[0014] Figure 3 This is a front structural diagram of the present invention. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Example

[0017] like Figure 1-3 The static torque testing device shown includes a housing 1, a backstop 2, an oil seal 3, a drive shaft 4, a coupling 5, a force-applying rod 6, a bolt 7, a fixed base 8, and a distance dividing groove 9.

[0018] The fixed base 8 is located at the bottom of the housing 1. Inside the housing 1, a drive shaft 4 is connected via a backstop 2. One end of the drive shaft 4 is connected to the test piece 10 via a coupling, and the other end is connected to a force-applying rod 6 via a coupling 5. The coupling 5 can be replaced with a detachable connection structure such as a flat key or spline.

[0019] The length direction of the force-adding rod 6 is perpendicular to the circumferential direction of the drive shaft 4; four distance dividing grooves 9 are formed on the force-adding rod 6.

[0020] The fixed base 8 is fixed to the ground or tabletop by bolts 7. The two ends of the drive shaft 4 are sealed to the housing 1 by oil seals 3.

[0021] The usage method is as follows:

[0022] First, fix the base 8 to the ground and connect the test piece 10, such as a 10R series AD shaft input gear reducer and the force-applying rod 6. Suspend a weight, such as a counterweight, on the distance dividing groove 9. The torque applied at this time is calculated by multiplying the force by the lever arm, which equals the maximum torque. When the force-applying rod 6 does not rotate without a weight, but rotates when a weight is suspended, it indicates that it can bear the current torque, and the number of rotations of the force-applying rod 6 is unknown. Then, remove the force-applying rod 6 from the connecting shaft 5 to make it horizontal again, and add more weight to increase the torque. During disassembly, the backstop 2's inability to rotate in the opposite direction is used to counteract the stress release of the structure and prevent rotation. Gradually increase the weight in this way until the test piece 10 is damaged, such as the housing cracking or the internal structure is damaged, thus obtaining its maximum torsional capacity.

[0023] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A static torque testing device comprising a fixed base (8) on which a housing (1) is fixed, characterized in that, The housing (1) is connected to a drive shaft (4) via a backstop (2). One end of the drive shaft (4) is detachably connected to the test piece (10), and the other end is detachably connected to a force rod (6). The length direction of the force rod (6) is perpendicular to the circumferential direction of the drive shaft (4). Several distance dividing grooves (9) are formed on the force rod (6).

2. The static torque testing device of claim 1, wherein, The other end of the drive shaft (4) is connected to the force rod (6) via a coupling (5), a flat key, or a spline.

3. The static torque testing device of claim 1, wherein, The fixed base (8) is fixed to the ground or tabletop by bolts (7).

4. The static torque testing device of claim 1, wherein, The two ends of the drive shaft (4) are sealed to the housing (1) by oil seals (3).

5. The static torque testing device of claim 1, wherein, The tested component (10) is a speed reducer.

6. The static torque testing device of claim 1, wherein, There are at least two distance dividing slots (9), and adjacent distance dividing slots (9) are spaced at the same interval.

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