Static locked-rotor torque testing device for electric tool

Abstract

The utility model relates to the technical field of torque testing, and discloses an electric tool static locked-rotor torque testing device, which comprises a bottom plate, a torque testing device is arranged on the bottom plate, a testing port is arranged on the torque testing device, a clamp is arranged on the bottom plate, two movable clamping plates are arranged on the clamp, and the clamping plates are arranged on the bottom plate. And a plurality of clamping structures are arranged on the two clamping plates. According to the utility model, through the design of the clamping plate and the pressing rod, the electric tool can be effectively fixed, it is ensured that the electric tool does not shake or move in the test process, the stability and accuracy of the test are improved, the torque generated by the electric tool in a static locked-rotor state can be accurately tested through the stable fixation of the electric tool, and the test efficiency is improved. And reliable data support is provided for evaluating the performance of the electric tool.

Description

Technical Field

[0001] The utility model relates to the technical field of torque testing, in particular to a static stall torque testing device for power tools. Background Technique

[0002] A static stall torque testing device for power tools is a device used to test the torque generated when a power tool stalls in a stationary state. This kind of device is usually used to evaluate the performance and safety of power tools.

[0003] When testing the torque of a power tool, it is necessary to clamp and fix the power tool to prevent the power tool from shaking during the test and ensure the accuracy of the test results. However, the applicability of existing power tool clamps is poor and cannot provide a stable clamping surface for the power tool because the outer surface of the power tool is generally irregular and not a flat surface. Therefore, under the clamping action of the clamp, the power tool may still shake. Especially when the output shaft of the power tool rotates, the power tool is very likely to shake under the action of high torque, which will affect the test accuracy of the device for the torque of the power tool.

[0004] Therefore, it is necessary to design a static stall torque testing device for power tools to solve the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to solve the deficiencies existing in the prior art and to provide a static stall torque testing device for power tools.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A static stall torque testing device for power tools includes a bottom plate. A torque testing device is arranged on the bottom plate. A testing port is opened on the torque testing device. A clamp is installed on the bottom plate. The clamp is provided with two movable clamping plates, and a number of clamping structures are arranged on both clamping plates.

[0008] As a preferred technical scheme of the utility model, the clamping structure includes a sealed outer cylinder, an opening, a sliding plug, a pressing rod, a spring, a number of through holes and a wire. The sealed outer cylinder is fixed on the clamping plate. The opening is opened at one end of the sealed outer cylinder. The sliding plug is hermetically and slidably connected to the inner surface of the sealed outer cylinder. One end of the pressing rod is fixedly connected to the sliding plug, and the other end of the pressing rod passes through the opening and extends to the outside of the sealed outer cylinder. One end of the spring is connected to the inner surface of the sealed outer cylinder, and the other end is connected to the sliding plug. A number of the through holes are all opened on the sliding plug. The wire is fixed inside the sealed outer cylinder, and the wire passes through one of the through holes. The inside of the sealed outer cylinder stores an electrorheological fluid.

[0009] As a preferred technical solution of the present utility model, there is a sealed connection between the outer surface of the pressing rod and the inner surface of the opening.

[0010] As a preferred technical solution of the present utility model, an anti-slip pad is provided at one end of the pressing rod located outside the sealed outer cylinder.

[0011] As a preferred technical solution of the present utility model, a plurality of clamping structures located on the same clamping plate are evenly distributed.

[0012] As a preferred technical solution of the present utility model, a power supply is installed on the bottom plate, a control switch is installed on the power supply, and a plurality of the wires are all electrically connected to the power supply.

[0013] The present utility model has the following beneficial effects:

[0014] Through the design of the clamping plate and the pressing rod, the electric tool can be effectively fixed, ensuring that there will be no shaking or movement during the test, improving the stability and accuracy of the test. Through the stable fixation of the electric tool, the torque generated by the electric tool in the static locked-rotor state can be accurately tested, providing reliable data support for evaluating the performance of the electric tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of a static locked-rotor torque test device for an electric tool proposed by the present utility model;

[0016] Figure 2 is a schematic structural diagram of the fixture and two clamping plates;

[0017] Figure 3 is a schematic structural diagram of the fixture and two clamping plates from another perspective;

[0018] Figure 4 is Figure 2 an enlarged view of the structure at A of

[0019] In the figure: 1 bottom plate, 2 torque test device, 3 test port, 4 fixture, 5 clamping plate, 61 sealed outer cylinder, 62 opening, 63 sliding plug, 64 pressing rod, 65 spring, 66 through hole, 67 wire. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0021] Refer to Figures 1-4, A static locked-rotor torque testing device for power tools, comprising a base plate 1, a torque testing device 2 is arranged on the base plate 1, a testing port 3 is opened on the torque testing device 2, a clamp 4 is installed on the base plate 1, two movable clamping plates 5 are arranged on the clamp 4, and a plurality of clamping structures are arranged on both clamping plates 5. The plurality of clamping structures located on the same clamping plate 5 are evenly distributed. The clamping structure includes a sealed outer cylinder 61, an opening 62, a sliding plug 63, a pressing rod 64, a spring 65, a plurality of through holes 66 and a wire 67. The sealed outer cylinder 61 is fixed on the clamping plate 5, the opening 62 is opened at one end of the sealed outer cylinder 61, the sliding plug 63 is hermetically and slidably connected to the inner surface of the sealed outer cylinder 61, one end of the pressing rod 64 is fixedly connected to the sliding plug 63, and the other end of the pressing rod 64 passes through the opening 62 and extends to the outside of the sealed outer cylinder 61. When a plurality of pressing rods 64 are all in contact with the power tool, the staff controls the clamp 4 to make the two clamping plates 5 stop moving. At this time, a plurality of pressing rods 64 can jointly form two clamping surfaces adapted to the outer shape of the power tool. A sealed connection is provided between the outer surface of the pressing rod 64 and the inner surface of the opening 62. An anti-slip pad is arranged at the end of the pressing rod 64 located outside the sealed outer cylinder 61. One end of the spring 65 is connected to the inner surface of the sealed outer cylinder 61, and the other end is connected to the sliding plug 63. A plurality of through holes 66 are all opened on the sliding plug 63. The wire 67 is fixed inside the sealed outer cylinder 61, and the wire 67 passes through one of the through holes 66. When the staff energizes a plurality of wires 67, the electrorheological fluid in the sealed outer cylinder 61 can be "solidified", the position of the sliding plug 63 will also be fixed, and the pressing rod 64 cannot move either. At this time, a plurality of pressing rods 64 can jointly fix the power tool, ensuring the stability of the power tool during the test, preventing the power tool from shaking during the test, thereby ensuring the test accuracy. A power supply is installed on the base plate 1, a control switch is installed on the power supply, and a plurality of wires 67 are all electrically connected to the power supply. The sealed outer cylinder 61 stores electrorheological fluid.

[0022] The specific working principle of the present utility model is as follows:

[0023] When the static locked-rotor torque testing device for power tools proposed by the present utility model is in use, first, the staff fixes the power tool between two clamping plates 5, then inserts the output shaft of the power tool into the test port 3, starts the power tool, and tests its torque. When fixing the power tool, the staff operates the fixture 4 to make the two clamping plates 5 approach each other. In this process, a number of pressing rods 64 will first come into contact with the power tool. When the pressing rod 64 contacts the power tool, the pressing rod 64 cannot move. Subsequently, with the continuous movement of the clamping plate 5, the pressing rod 64 will retract into the interior of the sealed outer cylinder 61, which causes the sliding plug 63 to slide inside the sealed outer cylinder 61. During the sliding process of the sliding plug 63, the electrorheological fluid inside the sealed outer cylinder 61 will pass through a number of through holes 66. When a number of pressing rods 64 all come into contact with the power tool, the staff controls the fixture 4 to make the two clamping plates 5 stop moving. At this time, a number of pressing rods 64 can jointly form two clamping surfaces adapted to the outer shape of the power tool. Further, the electrorheological fluid is a suspension under normal conditions, and it can undergo a liquid-to-solid transformation under the action of an electric field. When the externally applied electric field strength is much lower than a certain critical value, the electrorheological fluid is in a liquid state. When the electric field strength is much higher than this critical value, it becomes solid. When the staff energizes a number of wires 67, the electrorheological fluid inside the sealed outer cylinder 61 can be "solidified", and the position of the sliding plug 63 will also be fixed, and the pressing rod 64 cannot move either. At this time, a number of pressing rods 64 can jointly fix the power tool, ensuring the stability of the power tool during the test and preventing the power tool from shaking during the test, thereby ensuring the test accuracy;

[0024] A power supply is provided on the bottom plate 1, and a control switch is provided on the power supply. The staff can control the energization and de-energization of a number of wires 67 through the control switch. The circuit connection mode between a number of wires 67 and the power supply is prior art and is not an innovative part of this technical solution, which is not shown in the figure and will not be elaborated here.

[0025] The above is only a preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present utility model.

Claims

1. A static stall torque test device for an electric tool, comprising a base plate (1), a torque test device (2) being arranged on the base plate (1), a test port (3) being provided on the torque test device (2), a fixture (4) being installed on the base plate (1), two movable clamping plates (5) being arranged on the fixture (4), characterized in that: A plurality of clamping structures are provided on the two clamping plates (5); The clamping structure comprises a sealing outer cylinder (61), an opening (62), a sliding plug (63), a pressing rod (64), a spring (65), a plurality of through holes (66) and a wire (67); the sealing outer cylinder (61) is fixed on the clamping plate (5); the opening (62) is formed at one end of the sealing outer cylinder (61); the sliding plug (63) is sealingly and slidably connected to the inner surface of the sealing outer cylinder (61); one end of the pressing rod (64) is fixedly connected to the sliding plug (63); the pressing rod (64) is fixedly connected to the sliding plug (63); and the pressing rod (65) is fixedly connected to the clamping plate (5). The other end of the tightening rod (64) passes through the opening (62) and extends to the outside of the sealing outer cylinder (61). One end of the spring (65) is connected to the inner surface of the sealing outer cylinder (61), and the other end is connected to the sliding plug (63). A plurality of through holes (66) are provided on the sliding plug (63). The wire (67) is fixed inside the sealing outer cylinder (61), and the wire (67) passes through one of the through holes (66). Electrorheological fluid is stored inside the sealing outer cylinder (61).

2. The static stall torque test device for electric tools according to claim 1, characterized in that: The outer surface of the pressing rod (64) is sealed to the inner surface of the opening (62).

3. The static stall torque test device for electric tools according to claim 2, characterized in that: An anti-slip pad is provided at one end of the pressing rod (64) located outside the sealing outer cylinder (61).

4. The static stall torque test device for electric tools according to claim 1, characterized in that: The plurality of clamping structures located on the same clamping plate (5) are evenly distributed.

5. The electric tool static stall torque test device according to claim 2, characterized in that: A power supply is installed on the base plate (1), a control switch is installed on the power supply, and the plurality of wires (67) are electrically connected to the power supply.

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