Clamping device of connecting rod fatigue test device

Abstract

The utility model discloses a clamping device of a connecting rod fatigue test device, which comprises two upper connecting seats and two lower connecting seats, the two upper connecting seats are provided with upper elastic sleeves, the two lower connecting seats are provided with lower elastic sleeves, and the upper elastic sleeves are provided with lower elastic sleeves. Corresponding upper elastic sleeves and lower elastic sleeves are inserted into the mounting through holes in the upper part and the lower part of the connecting rod to be tested; the inner side walls of the left ends and the right ends of the upper elastic sleeve and the lower elastic sleeve are conical wall faces, the two transverse adjusting screw rods are inserted into the upper elastic sleeve and the lower elastic sleeve in a sleeved mode respectively, an axial screwing through hole is formed in the middle of the end supporting block, and the end supporting block is connected into the ends of the transverse adjusting screw rods in a screwed mode. The upper elastic sleeve and the lower elastic sleeve are connected with the connecting rod and are clamped and fixed with the connecting lining of the connecting rod, so that the connection tightness is ensured, the upper elastic sleeve and the lower elastic sleeve cannot collide with the connecting rod during detection, and the test accuracy is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to fatigue test equipment technical field more specifically relates to a kind of clamping device of connecting rod fatigue test device. BACKGROUND

[0002] Engine connecting rod is used to connect piston and crankshaft, and transmits the force suffered by piston to crankshaft. Therefore, connecting rod is subjected to non-equal amplitude alternating load of in-cylinder pressure and reciprocating inertia force, and fatigue fracture is its main failure mode.

[0003] Therefore, the fatigue test of engine connecting rod becomes an important link in the development of connecting rod.

[0004] And in the existing connecting rod fatigue test, its installation mode, such as the connecting rod fatigue test device with high reliability of Chinese patent application No. 201811065311.0, its connecting rod small end clamp and connecting rod large end clamp are connected with adapter flange I and adapter flange II respectively, and adapter flange I and adapter flange II are connected with fatigue test machine main drive shaft I and main drive shaft II through 8 connecting screws respectively. This connection mode makes the fatigue strength of connecting rod fatigue test device significantly higher than the connecting rod to be tested. The fatigue test device with high reliability ensures the continuity and effectiveness of connecting rod fatigue test, eliminates the risk of damage to the test device due to continuous connecting rod, and improves the reliability of camshaft driving device.

[0005] However, its connection is fixed by positioning shaft, and in order to be able to install connecting rod, there is gap between the positioning shaft and the mounting hole of connecting rod, which makes the connecting rod and the mounting shaft collide during detection, so the accuracy of detection. UTILITY MODEL CONTENTS

[0006] The utility model aims at overcoming the insufficient of prior art, and provides a kind of clamping device of connecting rod fatigue test device, it is connected with connecting rod by upper elastic sleeve and lower elastic sleeve, and its connecting bushing is fixed by clamping, guarantees the tightness of connection, so that upper elastic sleeve and lower elastic sleeve do not collide with connecting rod during detection, and the test accuracy is guaranteed.

[0007] The utility model solves the technical problem by the following scheme:

[0008] A kind of clamping device of connecting rod fatigue test device, including two upper connecting seats and two lower connecting seats, the upper elastic sleeve is installed on the two upper connecting seats, and the lower elastic sleeve is installed on the two lower connecting seats, the corresponding upper elastic sleeve and lower elastic sleeve are inserted into the installation through-hole of the upper part and the lower part of the connecting rod to be tested;

[0009] The inner side wall of the left and right ends of the upper and lower elastic sleeves is a tapered wall surface, two transverse adjusting screws are respectively inserted into the upper and lower elastic sleeves, the middle part of the end support block is formed with an axial screw hole, the end support block is screwed into the end part of the transverse adjusting screw, the outer side wall of the end support block is a tapered wall surface, which is pressed against the inner side wall of the end part of the upper or lower elastic sleeve, the outer side wall of the upper or lower elastic sleeve is pressed against the inner side wall of the corresponding mounting through hole of the upper and lower connecting seats, and the middle outer side wall of the upper or lower elastic sleeve is pressed against the inner side wall of the corresponding mounting through hole of the connecting rod.

[0010] The inner side wall of the corresponding mounting through hole of the connecting rod is clamped with a connecting rod bushing, and the middle outer side wall of the upper or lower elastic sleeve is pressed against the inner side wall of the corresponding connecting rod bushing.

[0011] The upper and lower elastic sleeves are metal sleeves, and the outer side wall thereof is a cylindrical shape.

[0012] A plurality of left and right cutting grooves are formed on the side plates of the upper and lower elastic sleeves, the left cutting groove of the upper or lower elastic sleeve extends from the left end to the right part, and the right cutting groove of the upper or lower elastic sleeve extends from the right end to the left part.

[0013] The prominent effect of the utility model is:

[0014] Compared with the prior art, the upper and lower elastic sleeves are connected with the connecting rod, the connecting sleeve is clamped and fixed, the connection tightness is ensured, the upper and lower elastic sleeves do not collide with the connecting rod during detection, and the test accuracy is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a partial structure schematic view of the utility model;

[0016] Figure 2 is a partial sectional view of the utility model;

[0017] Figure 3 is an angle changing partial sectional view of the utility model;

[0018] Figure 4 is a partial structure schematic view of the upper or lower elastic sleeve;

[0019] Figure 5 is Figure 4 an angle changing partial structure schematic view of the utility model;

[0020] Figure 6 is a partial structure schematic view of the connecting sleeve. DETAILED DESCRIPTION

[0021] Embodiment, seeFigures 1 to 6 The clamping device of the connecting rod fatigue test device comprises two upper connecting seats 10 and two lower connecting seats 20. The upper connecting seat 10 comprises an upper fixed connecting block 11 and an upper connecting block 12 fixed on the bottom surface of the upper fixed connecting block 11 by bolts. A semicircular recess is formed in the middle of the bottom surface of the upper fixed connecting block 11. A semicircular recess is formed in the middle of the top surface of the upper connecting block 12. The semicircular recess and the semicircular recess form an installation hole. The end of the upper elastic sleeve 30 is inserted into the installation hole, and the outer side wall thereof is pressed against the inner side wall of the corresponding installation hole.

[0022] The lower connecting seat 20 comprises a lower fixed connecting block 21 and a lower connecting block 22 fixed on the top surface of the lower fixed connecting block 21 by bolts. A first semicircular recess is formed in the middle of the top surface of the lower fixed connecting block 21. A second semicircular recess is formed in the middle of the bottom surface of the lower connecting block 22. The first semicircular recess and the second semicircular recess form an installation hole. The end of the lower elastic sleeve 40 is inserted into the installation hole of the lower connecting seat 20, and the outer side wall thereof is pressed against the inner side wall of the corresponding installation hole.

[0023] The installation holes of the upper part and the lower part of the connecting rod 100 to be tested are inserted into the corresponding upper elastic sleeve 30 and lower elastic sleeve 40. The inner side wall of the corresponding installation hole of the connecting rod 100 is clamped with the connecting rod bushing 101 (fixed by interference fit). The middle outer side wall of the upper elastic sleeve 30 or the lower elastic sleeve 40 is pressed against the inner side wall of the corresponding connecting rod bushing 101. A lubrication groove is formed in the inner side wall of the connecting rod bushing 101.

[0024] Further, the inner side wall of the left and right ends of the upper elastic sleeve 30 and the lower elastic sleeve 40 is a tapered wall. Two transverse adjusting screws 50 are inserted into the upper elastic sleeve 30 and the lower elastic sleeve 40, respectively. An axial screw hole is formed in the middle of the end support block 51. The end support block 51 is screwed into the end of the transverse adjusting screw 50. The outer side wall of the end support block 51 is a tapered wall, which is pressed against the inner side wall of the end of the upper elastic sleeve 30 or the lower elastic sleeve 40. The outer side wall of the upper elastic sleeve 30 and the lower elastic sleeve 40 is pressed against the inner side wall of the corresponding installation hole of the upper connecting seat 10 and the lower connecting seat 20. The middle outer side wall of the upper elastic sleeve 30 or the lower elastic sleeve 40 is pressed against the inner side wall of the corresponding installation hole of the connecting rod 100.

[0025] Further, the middle of the outer end of the end support block 51 is formed with an outwardly protruding rotating part. The outer end of the axial screw hole protrudes from the outer end surface of the rotating part.

[0026] Further, the upper elastic sleeve 30 and the lower elastic sleeve 40 are metal sleeves, and the outer side wall thereof is cylindrical.

[0027] The side plates of the upper elastic sleeve 30 and the lower elastic sleeve 40 are formed with a plurality of left cutting grooves 31 and right cutting grooves 32, the left cutting grooves 31 extend from the left end of the upper elastic sleeve 30 or the lower elastic sleeve 40 to the right part, and the right cutting grooves 32 extend from the right end of the upper elastic sleeve 30 or the lower elastic sleeve 40 to the left part.

[0028] Further, all the left cutting grooves 31 and the right cutting grooves 32 in the upper elastic sleeve 30 and the lower elastic sleeve 40 are arranged at intervals.

[0029] Further, the upper elastic sleeve 30 and the lower elastic sleeve 40 are each formed with three left cutting grooves 31 and three right cutting grooves 32, the three left cutting grooves 31 are evenly distributed on the upper elastic sleeve 30 or the lower elastic sleeve 40 with the center axis of the upper elastic sleeve 30 or the lower elastic sleeve 40 as the center, and the three right cutting grooves 32 are evenly distributed on the upper elastic sleeve 30 or the lower elastic sleeve 40 with the center axis of the upper elastic sleeve 30 or the lower elastic sleeve 40 as the center.

[0030] In the installation of the embodiment, first, the middle part of the upper elastic sleeve 30 and the lower elastic sleeve 40 is inserted into the connecting bush 101 at the corresponding installation through hole of the connecting rod 100, then, the two ends of the upper elastic sleeve 30 and the lower elastic sleeve 40 are inserted into the installation through hole of the corresponding upper connecting seat 10 and the installation through hole of the corresponding lower connecting seat 20, the two transverse adjusting screw rods 50 are inserted into the upper elastic sleeve 30 and the lower elastic sleeve 40 respectively, the end support block 51 is screwed into the end part of the transverse adjusting screw rod 50, the rotating part formed in the middle part of the outer end surface of the end support block 51 is rotated, so that the end support block 51 is rotated, the outer side wall of the end support block 51 is pressed against the inner side wall at the end part of the upper elastic sleeve 30 or the lower elastic sleeve 40, and the outer side wall of the upper elastic sleeve 30 and the lower elastic sleeve 40 is expanded outwardly as the end support block 51 moves inwardly, so that the outer side wall of the upper elastic sleeve 30 and the lower elastic sleeve 40 is pressed against the inner side wall of the corresponding installation through hole of the upper connecting seat 10 and the lower connecting seat 20, and the middle part of the outer side wall of the upper elastic sleeve 30 or the lower elastic sleeve 40 is pressed against the inner side wall of the connecting bush 101 of the corresponding installation through hole of the connecting rod 100, so as to be clamped and fixed.

[0031] After the installation is completed, the inner side wall of the connecting bush 101 of the connecting rod 100 and the outer side wall of the upper elastic sleeve 30 or the lower elastic sleeve 40 are in close connection without any gap, so that no collision occurs between them in the subsequent test, and the accuracy of the test is ensured.

[0032] Finally, it should be pointed out that the above embodiment is only a representative example of the present application. Obviously, the present application is not limited to the above embodiment, and many modifications can be made. Any simple modification, equivalent change and modification made according to the technical essence of the present application to the above embodiment shall be considered as falling within the protection scope of the present application.

Claims

1. A clamping device for a connecting rod fatigue testing device comprising two upper connecting seats (10) and two lower connecting seats (20), characterized in that: The upper elastic sleeve (30) is installed on the two upper connecting seats (10), the lower elastic sleeve (40) is installed on the two lower connecting seats (20), the upper part and the lower part of the connecting rod (100) to be tested are inserted into the corresponding upper elastic sleeve (30) and lower elastic sleeve (40); The inner side wall of the left and right ends of the upper elastic sleeve (30) and the lower elastic sleeve (40) is a tapered wall surface, the two transverse adjusting screws (50) are inserted into the upper elastic sleeve (30) and the lower elastic sleeve (40) respectively, the middle part of the end support block (51) is formed with an axial screw hole, the end support block (51) is screwed into the end of the transverse adjusting screw (50), the outer side wall of the end support block (51) is a tapered wall surface, which is pressed against the inner side wall at the end of the upper elastic sleeve (30) or the lower elastic sleeve (40), the outer side wall of the upper elastic sleeve (30) and the lower elastic sleeve (40) is pressed against the inner side wall of the corresponding mounting hole of the upper connecting seat (10) and the lower connecting seat (20), and the middle outer side wall of the upper elastic sleeve (30) or the lower elastic sleeve (40) is pressed against the inner side wall of the corresponding mounting hole of the connecting rod (100).

2. A clamping device for a connecting rod fatigue testing apparatus according to claim 1, characterized in that: The inner side wall of the corresponding mounting hole of the connecting rod (100) is clamped with the connecting rod bushing (101), and the middle outer side wall of the upper elastic sleeve (30) or the lower elastic sleeve (40) is pressed against the inner side wall of the corresponding connecting rod bushing (101).

3. The clamping device of a connecting rod fatigue testing apparatus according to claim 1, characterized by: The upper connecting seat (10) comprises an upper fixed connecting block (11) and an upper connecting block (12) fixed to the bottom surface of the upper fixed connecting block (11), the middle part of the bottom surface of the upper fixed connecting block (11) is formed with an upper semicircular recess, the middle part of the top surface of the upper connecting block (12) is formed with a lower semicircular recess, the upper semicircular recess and the lower semicircular recess form a mounting hole, and the end of the upper elastic sleeve (30) is inserted into the mounting hole and the outer side wall thereof is pressed against the inner side wall of the corresponding mounting hole; The lower connecting seat (20) comprises a lower fixed connecting block (21) and a lower connecting block (22) fixed to the top surface of the lower fixed connecting block (21), the middle part of the top surface of the lower fixed connecting block (21) is formed with a first lower semicircular recess, the middle part of the bottom surface of the lower connecting block (22) is formed with a second lower semicircular recess, the first lower semicircular recess and the second lower semicircular recess form a mounting hole, and the end of the lower elastic sleeve (40) is inserted into the mounting hole of the lower connecting seat (20) and the outer side wall thereof is pressed against the inner side wall of the corresponding mounting hole.

4. The clamping device of a connecting rod fatigue testing apparatus according to claim 1, characterized by: The outer end of the end support block (51) is formed with an outwardly protruding rotating portion, and the outer end of the axial screw hole protrudes from the outer end surface of the rotating portion.

5. The clamping device of a connecting rod fatigue testing apparatus according to claim 1, characterized by: The upper elastic sleeve (30) and the lower elastic sleeve (40) are metal sleeves, and the outer side wall thereof is cylindrical; A plurality of left cutting grooves (31) and right cutting grooves (32) are formed on the side plates of the upper elastic sleeve (30) and the lower elastic sleeve (40), the left cutting grooves (31) extend from the left end of the upper elastic sleeve (30) or the lower elastic sleeve (40) to the right part, and the right cutting grooves (32) extend from the right end of the upper elastic sleeve (30) or the lower elastic sleeve (40) to the left part.

6. A clamping device for a connecting rod fatigue testing apparatus as defined in claim 5, characterized in that: All left cutting grooves (31) and right cutting grooves (32) in the upper elastic sleeve (30) and the lower elastic sleeve (40) are arranged at intervals.

7. A clamping device for a connecting rod fatigue testing apparatus as defined in claim 6, characterized in that: Three left cutting grooves (31) and three right cutting grooves (32) are formed on the upper elastic sleeve (30) and the lower elastic sleeve (40), and the three left cutting grooves (31) are uniformly distributed on the upper elastic sleeve (30) or the lower elastic sleeve (40) with the center axis of the upper elastic sleeve (30) or the lower elastic sleeve (40) as the center, and the three right cutting grooves (32) are uniformly distributed on the upper elastic sleeve (30) or the lower elastic sleeve (40) with the center axis of the upper elastic sleeve (30) or the lower elastic sleeve (40) as the center.

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