Device for flexibly rotating front end face of engine crankshaft

Abstract

The utility model discloses a device for realizing flexible rotation of the front end face of an engine crankshaft, belongs to the technical field of crankshaft detection, and solves the problems of low detection efficiency, high labor intensity and damage to the surface of the front end of the crankshaft in the traditional crankshaft detection method. The device for achieving flexible rotation of the front end face of the engine crankshaft comprises a telescopic handle, a detachable first sleeve is arranged at one end of the handle, a first cavity is formed in the first sleeve, one end of the first cavity extends to the end face of one end of the first sleeve, and the other end of the first cavity extends to the end face of the other end of the first sleeve. A second groove extending in the radial direction of the first sleeve is formed in the portion, in the first cavity, of the first sleeve, a limiting block is arranged in the second groove in a sliding mode, sliding grooves are formed in the side walls of the two sides of the second groove, and sliding blocks matched with the sliding grooves are arranged on the two sides of the limiting block. The device for flexibly rotating the front end face of the engine crankshaft effectively reduces the labor intensity of detection workers and improves the detection efficiency.

Description

Technical Field

[0001] This utility model relates to the field of crankshaft detection technology, and more specifically, it relates to a device for enabling flexible rotation of the front end face of an engine crankshaft. Background Technology

[0002] The crankshaft is the most important component in an engine. It bears the force transmitted from the connecting rod and converts it into torque, which is then output through the crankshaft to drive other accessories on the engine. The crankshaft is subjected to the combined effects of centrifugal force from the rotating mass, periodically changing gas inertial force, and reciprocating inertial force, which subject the crankshaft to bending and torsional loads. Therefore, the crankshaft is required to have sufficient strength and rigidity.

[0003] Therefore, after installation, the crankshaft needs to undergo a rotational test to ensure its quality. However, there are no specialized auxiliary tools for this test; typically, inspectors manually rotate the crankshaft or use pliers to clamp the front end. The former, manual rotation, is not only inefficient but also physically demanding, while the latter can easily damage the crankshaft's front end surface. Therefore, there is an urgent need to design a device that allows for flexible rotation of the engine crankshaft's front end face. Utility Model Content

[0004] The technical problem to be solved by this utility model is to address the above-mentioned shortcomings of the prior art by providing a device that enables flexible rotation of the front end face of an engine crankshaft, effectively reducing the labor intensity of inspection workers, improving inspection efficiency, and avoiding damage to the surface of the crankshaft front end during inspection, thereby effectively extending its service life.

[0005] The technical solution of this utility model is as follows: a device for flexibly rotating the front end face of an engine crankshaft includes a retractable handle, one end of which is provided with a detachable first sleeve. The first sleeve contains a first cavity, one end of which extends to the end face of one end of the first sleeve. The first sleeve within the first cavity has a second groove extending radially therein. A limiting block is slidably provided within the second groove. Sliding grooves are provided on the side walls on both sides of the second groove. Sliding blocks adapted to the sliding grooves are provided on both sides of the limiting block. The sliding blocks are slidably installed within the sliding grooves. A circular column is provided at the top of the limiting block. The top of the circular column penetrates the first sleeve. A spring is fitted on the circular column within the second groove. One end of the spring is connected to the top surface of the limiting block, and the other end of the spring is connected to the top surface of the second groove. A transverse rod is provided at the top of the circular column.

[0006] As a further improvement, a rubber pad is provided at the bottom of the limiting block.

[0007] Furthermore, the handle is provided with a threaded hole, and the first sleeve is connected to the threaded hole through an external thread.

[0008] Furthermore, a third groove is provided at the end of the first cavity near the handle.

[0009] Furthermore, a second sleeve is provided at one end of the handle.

[0010] Furthermore, the lower part of the handle has anti-slip textured surfaces.

[0011] Beneficial effects

[0012] Compared with the prior art, this utility model has the following advantages:

[0013] This invention relates to a device for flexibly rotating the front end face of an engine crankshaft. The device is attached to the front end of the crankshaft by a first sleeve, and then the crankshaft is rotated by turning the handle, which effectively reduces the labor intensity of inspection workers and improves inspection efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the front cross-sectional structure of the present invention in use;

[0015] Figure 2 This is a schematic diagram of the front cross-sectional structure of this utility model;

[0016] Figure 3 for Figure 2 Enlarged structural diagram of A in the middle;

[0017] Figure 4 This is a schematic diagram of the front cross-sectional structure of the crankshaft front end in this utility model.

[0018] Wherein: 1-Crankshaft front end, 2-Handle, 3-First sleeve, 4-First cavity, 5-Keyway, 6-Second sleeve, 7-Second groove, 8-Limiting block, 9-Slide groove, 10-Slider, 11-Circular column, 12-Spring, 13-Horizontal rod, 14-Rubber pad, 15-Third groove. Detailed Implementation

[0019] The present invention will be further described below with reference to specific embodiments shown in the accompanying drawings.

[0020] See Figure 1-4A device for flexibly rotating the front end face of an engine crankshaft includes a telescopic handle 2, which is a telescopic rod whose length can be adjusted according to actual use. One end of the handle 2 is provided with a first sleeve 3, and the first sleeve 3 contains a first cavity 4. One end of the first cavity 4 extends to the end face of one end of the first sleeve 3. The first sleeve 3 within the first cavity 4 has a second groove 7 extending radially therein. A limiting block 8 is slidably disposed within the second groove 7, and the second groove 7 is adapted to the limiting block 8. Sliding grooves 9 are provided on the side walls of both sides of the second groove 7. Sliding blocks 10, adapted to the sliding grooves 9, are provided on both sides of the limiting block 8. The sliding blocks 10 are slidably installed within the sliding grooves 9, guiding the sliding of the limiting block 8 within the second groove 7 and limiting its movement. A circular column 11 is provided at the top of the limiting block 8. The top of the first sleeve 3 passes through the first sleeve 3. A spring 12 is fitted on the circular column 11 in the second groove 7. One end of the spring 12 is connected to the top surface of the limiting block 8, and the other end of the spring 12 is connected to the top surface of the second groove 7. A horizontal rod 13 is provided on the top of the circular column 11. After the crankshaft is inspected, the first sleeve 3 needs to be removed from the front end 1 of the crankshaft. The inspector can lift the horizontal rod 13 and move the limiting block 8 upward so that the bottom of the limiting block 8 is separated from the bottom of the keyway 5, making it easier to remove the first sleeve 3. When the first sleeve 3 is idle, the limiting block 8 falls under the action of gravity, the spring 12 is stretched, and the limiting block 8 is subjected to the tension of the spring 12. When the upward tension of the spring 12 on the limiting block 8 is equal to the weight of the limiting block 8, the limiting block 8 is in a stationary state. At this time, the bottom surface of the limiting block 8 is located in the first cavity 4.

[0021] In use, the crankshaft front end 1 is provided with a keyway 5 that connects to the pulley. The limiting block 8 is aligned with the keyway 5, and then the first sleeve 3 is fitted into the crankshaft front end 1. The limiting block 8 moves upward, the spring 12 is compressed, and the limiting block 8 is subjected to the pressure of the spring 12. The bottom surface of the limiting block 8 and the bottom surface of the keyway 5 are pressed against each other. Then, the handle 2 is turned, which drives the first sleeve 3 to rotate, thereby driving the crankshaft to rotate, completing the rotation detection of the crankshaft. This device is connected to the crankshaft front end body 1 by the first sleeve 3, and then the crankshaft is rotated by turning the handle 2, which effectively reduces the labor intensity of the inspection workers and improves the inspection efficiency.

[0022] In this embodiment, a rubber pad 14 is provided at the bottom of the limiting block 8. The rubber pad 14 installed at the bottom of the limiting block 8 increases the friction between the limiting block 8 and the keyway 5, thereby improving the firmness of the limiting block 8 when the crankshaft is rotated, and at the same time making the limiting block 8 and the keyway 5 in flexible contact, so as to avoid damage to the keyway 5 on the front end 1 of the crankshaft.

[0023] In this embodiment, the handle 2 is provided with a threaded hole, and the first sleeve 3 is connected to the threaded hole through an external thread. The first sleeve 3 is threadedly connected to the handle 2, which facilitates the disassembly of the first sleeve 3. The corresponding first sleeve 3 can be replaced according to the different diameters of the crankshaft, thus expanding its application range and making it easy to disassemble the first sleeve 3 for maintenance.

[0024] In this embodiment, a third groove 15 is provided at one end of the first cavity 4 near the handle 2, which effectively reduces the overall weight of the first sleeve 3. The width of the third groove 15 is smaller than the diameter of the crankshaft front end 1. When the first sleeve 3 is placed on the crankshaft front end 1, the insertion depth of the crankshaft front end 1 can be limited.

[0025] In this embodiment, a second sleeve 6 is provided at one end of the handle 2. The second sleeve 6 can be an internal hexagonal socket, which can be used to tighten bolts. At the same time, the second sleeve 23 can be temporarily used as a hammer to strike small objects, thus expanding the scope of use of the device.

[0026] In this embodiment, the lower part of the handle 2 is provided with anti-slip texture, which increases the roughness of the surface of the handle 2, thereby increasing the friction between the handle 2 and the surface of the inspector's palm, and preventing the inspector's hand from slipping when holding the handle 2 during the crankshaft inspection process.

[0027] 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 modifications and improvements can be made without departing from the structure of the present utility model. These modifications and improvements will not affect the effectiveness of the present utility model or the practicality of the patent.

Claims

1. A device for enabling flexible rotation of the front end face of an engine crankshaft, characterized in that, Includes a retractable handle (2), one end of which is provided with a detachable first sleeve (3). The first sleeve (3) contains a first cavity (4), one end of which extends to the end face of one end of the first sleeve (3). The first sleeve (3) inside the first cavity (4) is provided with a second groove (7) extending radially therein. A limiting block (8) is slidably provided in the second groove (7). Sliding grooves (9) are provided on the sidewalls on both sides of the second groove (7). The limiting block (8) is provided with sliding grooves (9) on both sides. A slider (10) adapted to the groove (9) is slidably installed in the groove (9). A circular column (11) is provided on the top of the limiting block (8). The top of the circular column (11) passes through the first sleeve (3). A spring (12) is sleeved on the circular column (11) in the second groove (7). One end of the spring (12) is connected to the top surface of the limiting block (8), and the other end of the spring (12) is connected to the top surface of the second groove (7). A horizontal rod (13) is provided on the top of the circular column (11).

2. The device for enabling flexible rotation of the front end face of an engine crankshaft according to claim 1, characterized in that, The bottom of the limiting block (8) is provided with a rubber pad (14).

3. The device for enabling flexible rotation of the front end face of an engine crankshaft according to claim 1, characterized in that, The handle (2) is provided with a threaded hole, and the first sleeve (3) is connected to the threaded hole through an external thread.

4. The device for enabling flexible rotation of the front end face of an engine crankshaft according to claim 1, characterized in that, The first cavity (4) has a third groove (15) at one end near the handle (2).

5. The device for enabling flexible rotation of the front end face of an engine crankshaft according to claim 1, characterized in that, The handle (2) is also provided with a second sleeve (6) at one end.

6. The device for enabling flexible rotation of the front end face of an engine crankshaft according to claim 1, characterized in that, The lower part of the handle (2) is provided with anti-slip texture.

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