Pin shear test tool for steering engine

Abstract

The utility model discloses a pin shear test tool for a steering engine, which comprises a sleeve seat, at least one pin mounting hole is arranged on the sleeve seat, and the axis of the pin mounting hole is perpendicular to the central axis of the sleeve seat; the shearing shaft is coaxially inserted into the sleeve seat, and the outer wall of the shearing shaft is in contact with the pin to be tested in the pin mounting hole; and the power input part is arranged at the top of the shearing shaft, comprises a wrench insertion hole penetrating through the shearing shaft and is used for being connected with a torque wrench to drive the shearing shaft to rotate. Through clearance fit and the design of the spiral shearing blade, shearing force is ensured to be transmitted uniformly, and deflection errors are avoided; the pin mounting holes distributed in the circumferential direction support simultaneous testing of pins of various specifications, and the testing efficiency is improved; operation stability is achieved, and the fixing reliability is enhanced through the design of anti-skid lines and a plane structure.

Description

Technical Field

[0001] This utility model relates to the field of mechanical testing tooling technology, and in particular to a pin shearing test tooling for servo motors. Background Technology

[0002] As a critical connecting component, the shear strength of the servo pin directly affects the safety performance of the equipment. In the existing technology, pin shear tests are mostly conducted using general-purpose fixtures and manual tools, which has the following drawbacks: the pin is prone to deflection during the test, resulting in inaccurate shear force data; it cannot be adapted to different types of pins, and frequent tooling changes are required.

[0003] The present invention aims to solve the above problems by providing a specialized testing fixture that is compact in structure, has high testing accuracy, and is highly adaptable. Utility Model Content

[0004] The purpose of this invention is to provide a pin shearing test fixture for servo motors, thereby solving the aforementioned problems existing in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A pin shearing test fixture for a servo motor includes:

[0007] A sleeve is provided with at least one pin mounting hole, the axis of which is perpendicular to the central axis of the sleeve.

[0008] The shearing shaft is coaxially inserted into the sleeve, and the outer wall of the shearing shaft contacts the pin to be tested in the pin mounting hole;

[0009] A power input unit is located at the top of the shearing shaft. The power input unit includes a wrench socket that passes through the shearing shaft for connecting a torque wrench to drive the shearing shaft to rotate.

[0010] In some specific embodiments, the contact surface between the sleeve and the shearing shaft is a clearance fit, with a clearance range of 0.05-0.1mm, and the bottom of the sleeve is provided with a planar structure for fixing in a vise.

[0011] In some specific embodiments, the pin mounting holes are evenly distributed along the circumference of the sleeve, and the diameter of each pin mounting hole corresponds to the diameter tolerance range of different pin models.

[0012] In some specific embodiments, the outer wall of the shearing shaft is provided with a spiral shearing blade, the spiral angle of the shearing blade is 15°-30°, and the hardness of the cutting edge is HRC45-50.

[0013] In some specific embodiments, the outer wall of the sleeve is provided with anti-slip texture, which is an array of staggered diamond-shaped protrusions.

[0014] The beneficial effects of this utility model are as follows: This utility model discloses a pin shearing test fixture for servo motors, comprising: a sleeve with at least one pin mounting hole, the axis of which is perpendicular to the central axis of the sleeve; a shearing shaft coaxially inserted into the sleeve, the outer wall of which contacts the pin to be tested in the pin mounting hole; and a power input unit located at the top of the shearing shaft, including a wrench insertion hole penetrating the shearing shaft for connecting a torque wrench to drive the shearing shaft to rotate. This utility model ensures uniform shearing force transmission and avoids skew errors through clearance fit and helical shearing blade design; multi-model compatibility: the circumferentially distributed pin mounting holes support simultaneous testing of multiple pin specifications, improving testing efficiency; operational stability: the anti-slip texture and planar structure design enhances fixing reliability. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a pin shearing test fixture for a servo motor according to the present invention.

[0016] In the attached diagram, 1 is the sleeve; 11 is the pin mounting hole; 2 is the shearing shaft; and 21 is the wrench insertion hole. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0018] Reference Figure 1 The servo motor pin shearing test fixture shown includes a sleeve 1, on which at least one pin mounting hole 11 is provided, and the axis of the pin mounting hole 11 is perpendicular to the central axis of the sleeve 1.

[0019] The shearing shaft 2 is coaxially inserted into the sleeve 1, and the outer wall of the shearing shaft 2 contacts the pin to be tested in the pin mounting hole 11.

[0020] The power input unit is located at the top of the shearing shaft 2. The power input unit includes a wrench socket 21 that passes through the shearing shaft 2 for connecting a torque wrench to drive the shearing shaft 2 to rotate.

[0021] In some specific embodiments, the contact surface between the sleeve 1 and the shearing shaft 2 is a clearance fit, with a clearance range of 0.05-0.1mm, and the bottom of the sleeve 1 is provided with a planar structure for fixing in a bench vise.

[0022] In some specific embodiments, the pin mounting holes 11 are evenly distributed around the sleeve 1, and the diameter of each pin mounting hole 11 corresponds to the diameter tolerance range of different types of pins.

[0023] In some specific embodiments, the outer wall of the shearing shaft 2 is provided with a spiral shearing blade, the spiral angle of the shearing blade is 15°-30°, and the hardness of the blade edge is HRC45-50.

[0024] In some specific embodiments, the outer wall of the sleeve 1 is provided with anti-slip texture, which is an array of staggered diamond-shaped protrusions.

[0025] In this embodiment, the sleeve 1 is a hollow cylindrical structure with anti-slip texture on its outer wall. The anti-slip texture is an array of staggered diamond-shaped protrusions used to enhance the friction when held by hand or clamped in a vise. The bottom of the sleeve 1 is machined with a flat structure to facilitate fixation by a vise. At least one pin mounting hole 11 is evenly opened in the circumferential direction on the side wall of the sleeve 1. The axis of each pin mounting hole 11 is perpendicular to the central axis of the sleeve 1, and the hole diameter is designed according to the diameter tolerance range of the pin model (e.g., Φ3±0.05mm, Φ5±0.05mm, etc.).

[0026] Shearing shaft 2: It is coaxially inserted into the inside of the sleeve 1 and has a clearance fit with the inner wall of the sleeve 1 (fitting clearance 0.05-0.1mm) to ensure that the shearing shaft 2 can rotate freely while reducing friction loss; the outer wall of the shearing shaft 2 is machined with a spiral shearing blade with a spiral angle of 15°-30° to reduce instantaneous impact force through progressive shearing; the shearing blade is heat-treated to achieve a cutting edge hardness of HRC45-50, taking into account both wear resistance and impact resistance.

[0027] Power input section: Located at the top of the shearing shaft 2, it includes a wrench insertion hole 21 that passes through the shearing shaft 2 for inserting the drive rod of a torque wrench, and applying shearing force to the pin by rotating the shearing shaft 2.

[0028] Example 1

[0029] The sleeve 1 has an outer diameter of Φ50mm and a height of 80mm, with three pin mounting holes 11, with diameters of Φ3.05mm, Φ5.05mm, and Φ8.05mm respectively. The shearing shaft 2 has an outer diameter of Φ49.9mm, forming a 0.1mm clearance fit with the sleeve. The spiral shearing blade 22 has a spiral angle of 25°, and the cutting edge is high-frequency hardened to HRC48. During testing, a torque wrench with a range of 0-200 N·m was used to drive the shearing shaft, and the average shearing torque of the Φ5mm pin was measured to be 75 N·m, with a data repeatability error of less than 3%.

[0030] Working principle:

[0031] The sleeve 1 is fixed to the vise via the bottom flat structure;

[0032] Insert the pin to be tested into the pin mounting hole 11 of the corresponding specification;

[0033] Insert the torque wrench into the wrench socket 21 of the shear shaft 2, slowly rotate the shear shaft 2, and apply a progressive shearing force to the pin using the spiral shear blade;

[0034] When the pin breaks, record the peak torque value displayed by the torque wrench as the shear strength data of the pin.

[0035] By adopting the above-disclosed technical solution of this utility model, the following beneficial effects are obtained:

[0036] High-precision measurement: Through clearance fit and spiral shear blade design, the shearing force is ensured to be transmitted evenly, avoiding skew errors;

[0037] Multi-model compatibility: The circumferentially distributed pin mounting holes 11 support simultaneous testing of multiple pin specifications, improving testing efficiency;

[0038] Operational stability: The anti-slip texture and planar structure design enhance the reliability of the fixation, and the limiting components prevent overload rotation;

[0039] Long lifespan: High-hardness shearing blades and bluing treatment extend the service life of tooling.

[0040] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A rudder pin shear test tool for a steering gear, characterized by, The application relates to a pin shearing device, which comprises the following parts: a sleeve (1) provided with at least one pin mounting hole (11), the axis of the pin mounting hole (11) being perpendicular to the central axis of the sleeve (1); a shearing shaft (2) coaxially inserted into the sleeve (1), the outer wall of the shearing shaft (2) being in contact with the pin to be tested in the pin mounting hole (11); a power input part arranged at the top of the shearing shaft (2), the power input part comprising a spanner insertion hole (21) penetrating through the shearing shaft (2) and being used for connecting a torque spanner to drive the shearing shaft (2) to rotate.

2. The pin shear test tool for a steering engine according to Claim 1, wherein The contact surface of the sleeve (1) and the shearing shaft (2) is in clearance fit, the fitting clearance ranges from 0.05 mm to 0.1 mm, and the bottom of the sleeve (1) is provided with a flat structure for fixing a bench clamp.

3. The pin shear test tool for a steering engine according to claim 1 or 2, characterized by The pin mounting holes (11) are uniformly distributed along the circumference of the sleeve (1), and the diameters of the pin mounting holes (11) respectively correspond to the diameter tolerance ranges of different types of pins.

4. The pin shear test tool for a steering engine according to claim 3, characterized by The outer wall of the shearing shaft (2) is provided with a spiral shearing blade, the spiral angle of the shearing blade ranges from 15 DEG to 30 DEG, and the blade edge hardness ranges from HRC45 to HRC50.

5. The pin shear test tool for a steering engine according to Claim 1, wherein The outer wall of the sleeve (1) is provided with anti-skid lines, and the anti-skid lines are an array of staggered rhombic convexes.

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