Auxiliary fixing tool for measuring crankshaft clearance of air-cooled diesel engine

Abstract

The utility model discloses an air-cooled diesel engine crankshaft clearance measurement fixing assistive device, which relates to the technical field of fixing assistive devices, and comprises a bearing sleeve, a base body is movably arranged at the side end part of the bearing sleeve, a clamping claw is arranged at the side end part of the base body, and clamping claws are arranged at the two side end parts of the bearing sleeve. A first spring is installed at the side end of the clamping claw, a first cylindrical pin is rotatably installed at the top end of the clamping claw, a guide body is fixedly installed on the outer side of the bearing sleeve, a trapezoidal clamping plate is movably installed at the side end of the guide body, and stable return force is provided through the first spring. The clamping claws can be adjusted in a sliding mode at one time of the bearing sleeve to clamp and fix the bearing sleeve, meanwhile, the base body and the bearing sleeve are installed through the small round nuts, the small round nuts play a role in preventing bolts or screws from loosening, and the first cylindrical pins are used for connecting the clamping claws and the bearing sleeve to achieve positioning installation between parts. And the relative position accuracy of the assembled part is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of fixing aids, in particular to a fixing aid for measuring the clearance of a crankshaft of an air-cooled diesel engine. Background Art

[0002] The existence of the crankshaft axial clearance during the diesel engine assembly process is to avoid the hidden dangers of the crankshaft sticking when heated. If the clearance is too small, it will increase the movement resistance of the crankshaft and cause overheating; if it is too large, it will cause axial movement of the crankshaft, which will cause the piston to deviate from the cylinder and the connecting rod to bend.

[0003] When measuring the axial clearance of the crankshaft, it is usually necessary to manually push the crankshaft in order to read the size of the clearance more accurately. However, the force applied when pushing the crankshaft may not be uniform or stable enough, which may cause a certain deviation in the measurement result. The measurement result will be affected by human factors and have certain errors, affecting the accuracy of the detection. Utility Model Content

[0004] (1) Technical problems solved

[0005] In response to the shortcomings of the existing technology, the utility model provides an air-cooled diesel engine crankshaft clearance measurement and fixing aid to solve the technical problem that the force applied when pushing the crankshaft may not be uniform or stable enough, which may lead to certain deviations in the measurement results, resulting in certain errors in the measurement results due to human factors, thus affecting the accuracy of the detection.

[0006] (2) Technical solution

[0007] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A fixing aid for measuring the crankshaft clearance of an air-cooled diesel engine comprises a bearing sleeve, a base body being movably mounted on the side end portion of the bearing sleeve, a clamping claw being provided on the side end portion of the base body, clamping claws being provided on both side end portions of the bearing sleeve, a first spring being mounted on the side end portion of the clamping claw, a first cylindrical pin being rotatably mounted on the top end portion of the clamping claw, a guide body being fixedly mounted on the outer side of the bearing sleeve, a trapezoidal clamping plate being movably mounted on the side end portion of the guide body, and a second spring being fixedly mounted on the side end portion of the trapezoidal clamping plate.

[0009] Preferably: a threaded core shaft is rotatably installed inside the bearing sleeve, a tailstock shaft is fixedly installed on the side end of the bearing sleeve, a cover plate is fixedly installed on the side end of the bearing sleeve, a first screw is rotatably installed on the side end of the cover plate, a second cylindrical pin is provided on the side end of the bearing sleeve, a handle body is provided on the outside of the second cylindrical pin, a handle ball head is fixedly installed on one end of the handle body, a disk body is provided inside the guide body, a second screw is rotatably installed on the side end of the guide body, a third cylindrical pin is rotatably installed inside the guide body, a card is fixedly installed on the side end of the guide body, and a lever is fixedly installed on the side end of the card.

[0010] (3) Beneficial effects

[0011] 1. Fix the measuring dial indicator to the rear end face of the crankcase, make the pointer contact with the rear end face of the crankshaft and adjust it to zero, fix the clamping claws with the rear end inner surface of the crankcase, then shake the first cylindrical pin to make the guide slide to one side to press against the rear end face of the crankshaft, and use the gripping force of the clamping claws to push the crankshaft forward to the limit position. At this time, the axial clearance value is obtained by observing the dial indicator pointer reading. By comparing it with the design value, check whether it is within the qualified requirements. If the clearance value exceeds the qualified range, the crankshaft needs to be repaired or replaced to ensure the normal operation of the machine and increase the accuracy of the detection.

[0012] 2. The first spring provides a stable return force, allowing the clamping claw to slide and adjust once on the bearing sleeve to clamp and fix it. At the same time, the base and the bearing sleeve are installed through a small round nut. The small round nut prevents the bolt or screw from loosening. The first cylindrical pin is used to connect the clamping claw and the bearing sleeve, and plays a role in positioning and installing the parts to ensure the relative position of the parts after assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and to implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0014] Figure 1 This is a structural diagram of the bearing sleeve of the utility model;

[0015] Figure 2 This is a structural diagram of the trapezoidal plywood of the present invention;

[0016] Figure 3 This is a structural diagram of the clamping claw of the utility model;

[0017] Figure 4 This is a structural diagram of the guide body of the utility model.

[0018] Legend: 11. Clamping claw; 12. First spring; 13. First cylindrical pin; 14. Tail stock shaft; 17. Base; 18. Threaded core shaft; 19. Bearing sleeve; 21. First screw; 22. Cover plate; 23. Handle body; 24. Second cylindrical pin; 25. Handle ball head; 27. Lever; 28. Card; 29. Disc body; 31. Guide body; 32. Second screw; 33. Third cylindrical pin; 34. Second spring; 35. Trapezoidal splint. DETAILED DESCRIPTION

[0019] The embodiment of the present application provides an air-cooled diesel engine crankshaft clearance measurement and fixing aid, which effectively solves the problem that the force applied when pushing the crankshaft may not be uniform or stable, which may lead to certain deviations in the measurement results, and the measurement results may be affected by human factors and have certain errors, affecting the accuracy of the detection. The measuring micrometer is fixed to the rear end face of the crankcase, the pointer contacts the rear end face of the crankshaft and is adjusted to zero point, the clamping claws are respectively fixed using the rear end inner cavity surface of the crankcase, and then the first cylindrical pin is shaken to make the guide body slide to one side to support the rear end face of the crankshaft, and the gripping force of the clamping claw is used to push the crankshaft forward to the limit position. At this time, the axial clearance value is obtained by observing the micrometer pointer reading, and by comparing it with the design value, it is checked whether it is within the qualified requirements. If the clearance value exceeds the qualified range, the crankshaft needs to be repaired or replaced to ensure the normal operation of the machine and increase the accuracy of the detection.

[0020] Example

[0021] like Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, the technical solution in the embodiment of the present application effectively solves the problem that the force applied when pushing the crankshaft may not be uniform or stable enough, which may lead to certain deviations in the measurement results, resulting in certain errors in the measurement results due to human factors, and affecting the accuracy of the detection. The overall idea is as follows:

[0022] In response to the problems existing in the prior art, the utility model provides an air-cooled diesel engine crankshaft clearance measuring and fixing auxiliary device, including a bearing sleeve 19, a base 17 is movably installed on the side end of the bearing sleeve 19, a clamping claw 11 is provided on the side end of the base 17, and the two side ends of the bearing sleeve 19 are provided with clamping claws 11, the side ends of the clamping claws 11 are installed with a first spring 12, and the top end of the clamping claws 11 is rotatably installed with a first cylindrical pin 13, and a guide body 31 is fixedly installed on the outer side of the bearing sleeve 19. Shaking the first cylindrical pin 13 causes the guide body 31 to slide to one side and press against the rear end surface of the crankshaft. The gripping force of the clamping claws 11 is used to push the crankshaft forward to the limit position. At this time, the axial clearance value is obtained by observing the micrometer pointer reading, and by comparing it with the design value, it is checked whether it is within the qualified requirements. The side end of the guide body 31 is movably installed with a trapezoidal clamping plate 35, and the side end of the trapezoidal clamping plate 35 is fixedly installed with a second spring 34.

[0023] The threaded core shaft 18 is rotatably installed inside the bearing sleeve 19, the tailstock shaft 14 is fixedly installed on the side end of the bearing sleeve 19, the cover plate 22 is fixedly installed on the side end of the bearing sleeve 19, the first screw 21 is rotatably installed on the side end of the cover plate 22, the side end of the bearing sleeve 19 is provided with a second cylindrical pin 24, the outside of the second cylindrical pin 24 is provided with a handle body 23, one end of the handle body 23 is fixedly installed with a handle ball head 25, the inside of the guide body 31 is provided with a disk body 29, the side end of the guide body 31 is rotatably installed with the second screw 32, the inside of the guide body 31 is rotatably installed with the third cylindrical pin 33, the side end of the guide body 31 is fixedly installed with a card 28, and the side end of the card 28 is fixedly installed with a lever 27.

[0024] Working principle:

[0025] The first step is to use bolts and gaskets to firmly install the bearing sleeve 19 on the diesel engine crankshaft. Before starting the measurement, the measuring head needs to contact the reference zero point for zeroing. By rotating the first cylindrical pin 13 clockwise, the first cylindrical pin 13 drives the threaded core shaft 18 inside the bearing sleeve 19 to rotate, and the position of the measuring head can be accurately adjusted to coincide with the reference point. By rotating the first cylindrical pin 13, the first cylindrical pin 13 drives the threaded core shaft 18 to rotate, so that the measuring head contacts the gap between the crankshaft and the bearing. During the contact process, the first spring 12 provides a stable return force, allowing the clamping claw 11 to slide and adjust once in the bearing sleeve 19 to clamp and fix it. At the same time, the base 17 and the bearing sleeve 19 are installed by a small round nut. The small round nut prevents the bolts or screws from loosening. The first cylindrical pin 13 is used to connect the clamping claw 11 and the bearing sleeve 19, and plays a positioning installation between the parts to ensure that the relative position of the parts after assembly is accurate.

[0026] In the second step, the first spring 12 is installed to the side end of the bearing sleeve 19 by rotating the clamping claw 11 at the side end of the bearing sleeve 19 to play the role of sealing connection. After the crankshaft is installed, the measuring dial indicator is fixed to the rear end face of the crankcase. The pointer contacts the rear end face of the crankshaft and is adjusted to zero. The clamping claw 11 is fixed using the rear end inner cavity surface of the crankcase, and then the first cylindrical pin 13 is shaken to make the guide body 31 slide to one side to support the rear end surface of the crankshaft. The gripping force of the clamping claw 11 is used to push the crankshaft forward to the limit position. At this time, the axial clearance value is obtained by observing the dial indicator pointer reading, and compared with the design value to check whether it is within the qualified requirements.

[0027] Finally, it should be noted that the above embodiments are merely examples for the purpose of illustrating the present invention and are not intended to limit the embodiments. Those skilled in the art will readily appreciate that other variations or modifications based on the above description are possible. It is not necessary and impossible to provide an exhaustive list of all possible embodiments. However, any obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A fixing device for measuring the crankshaft clearance of an air-cooled diesel engine, comprising a bearing sleeve (19), characterized in that: The side end of the bearing sleeve (19) is movably mounted with a base (17), the side end of the base (17) is provided with a clamping claw (11), both side ends of the bearing sleeve (19) are provided with a clamping claw (11), the side end of the clamping claw (11) is mounted with a first spring (12), the top end of the clamping claw (11) is rotatably mounted with a first cylindrical pin (13), the outer side of the bearing sleeve (19) is fixedly mounted with a guide body (31), the side end of the guide body (31) is movably mounted with a trapezoidal clamping plate (35), and the side end of the trapezoidal clamping plate (35) is fixedly mounted with a second spring (34).

2. The air-cooled diesel engine crankshaft clearance measuring fixture according to claim 1, characterized in that: A threaded core shaft (18) is rotatably mounted inside the bearing sleeve (19), and a tailstock shaft (14) is fixedly mounted on the side end portion of the bearing sleeve (19).

3. The air-cooled diesel engine crankshaft clearance measuring fixture according to claim 1, characterized in that: A cover plate (22) is fixedly mounted on the side end of the bearing sleeve (19), and a first screw (21) is rotatably mounted on the side end of the cover plate (22).

4. The air-cooled diesel engine crankshaft clearance measuring fixture according to claim 1, characterized in that: A second cylindrical pin (24) is provided at the side end of the bearing sleeve (19), a handle body (23) is provided on the outside of the second cylindrical pin (24), and a handle ball head (25) is fixedly mounted on one end of the handle body (23); A gasket is installed between the handle body (23) and the handle ball head (25).

5. The air-cooled diesel engine crankshaft clearance measuring fixture according to claim 1, characterized in that: A disc (29) is provided inside the guide body (31), a second screw (32) is rotatably mounted on the side end of the guide body (31), and a third cylindrical pin (33) is rotatably mounted inside the guide body (31).

6. The air-cooled diesel engine crankshaft clearance measuring fixture according to claim 1, characterized in that: A card (28) is fixedly mounted on the side end of the guide body (31), and a lever (27) is fixedly mounted on the side end of the card (28).

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