Bearing force testing machine of slewing bearing

Abstract

The utility model discloses a bearing force testing machine of a slewing bearing, and belongs to the field of slewing bearing testing. A bearing force testing machine of a slewing bearing comprises a pair of extrusion blocks which are transversely arranged, a connecting piece is arranged in the middle position between the two extrusion blocks, and four hydraulic telescopic rods are evenly distributed on the outer portion of the connecting piece in a surrounding mode. According to the utility model, the problem that the tooth space on the inner wall of the slewing bearing is easy to damage in the testing process of the existing slewing bearing testing machine is solved, the slewing bearing inner ring is clamped through the first clamping sheet and the second clamping sheet, and after clamping and auxiliary fixing, the tooth space on the inner wall of the slewing bearing is not damaged. The limiting block can be pushed after the first threaded rod rotates, the limiting block can be embedded into the tooth groove of the inner ring of the slewing bearing after being pushed, the slewing bearing is further fixed, and the tooth groove of the inner ring of the slewing bearing cannot be damaged.

Description

Technical Field

[0001] The utility model relates to the field of slewing bearing testing, in particular to a bearing force testing machine for a slewing bearing. Background Art

[0002] The bearing force testing machine for slewing bearings is a device specifically designed to test the bearing capacity of slewing bearings. By simulating various stress conditions under actual working conditions, the slewing bearings are loaded and tested to evaluate their performance, durability, and reliability. The testing machine can accurately measure the deformation, stress distribution, and failure mode of the bearings when subjected to loads in different directions and sizes, providing an important basis for the design, manufacture, and quality inspection of slewing bearings.

[0003] Chinese patent publication number CN211967241U discloses an engineering slewing bearing testing machine, which includes a bearing support block, a support frame and a limit gap detection mechanism welded to the top of the outer wall of the base plate, and reinforcement rods welded to both sides of the inner surface of the support frame. By arranging the bearing support shaft, a first telescopic rod and the bearing support block, the movement of the bearing support block can be controlled by the first telescopic rod. The outer periphery of the bearing support shaft can be expanded or reduced to accommodate slewing bearings of different diameters, thereby realizing the width and narrowness test of the gap of various types of slewing bearings.

[0004] During the testing process of the slewing bearing testing machine of the above-mentioned patent, when adapting and testing slewing bearings of different sizes, the inner wall of the slewing bearing contacts the inner wall through the bearing support block. The inner wall of the inner ring of the slewing bearing has tooth grooves for transmission. After the bearing support block contacts the inner wall and squeezes the slewing bearing, the tooth grooves on the inner wall of the slewing bearing are easily damaged. Utility Model Content

[0005] The purpose of the utility model is to provide a bearing force testing machine for a slewing bearing, in which the inner ring of the slewing bearing is clamped by a first clamping piece and a second clamping piece. After clamping and auxiliary fixation, the limiting block pushes the limiting block after the rotation of the first threaded rod. After being pushed, the limiting block is embedded in the tooth groove of the inner ring of the slewing bearing, further completing the fixation of the slewing bearing without damaging the tooth groove of the inner ring of the slewing bearing, thereby solving the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a bearing force testing machine for a slewing bearing, comprising a pair of extrusion blocks arranged laterally, a connecting piece provided at the middle position between the two extrusion blocks, four hydraulic telescopic rods evenly distributed around the outside of the connecting piece, a transmission block provided at one end of each of the four hydraulic telescopic rods, a second clamping piece with a mounting hole welded to one side of the upper end of the transmission block, a first clamping piece with a mounting hole provided on the other side of the second clamping piece, after the first clamping piece and the second clamping piece move relative to each other, the limiting block can be pushed and moved toward the inner ring of the slewing bearing to avoid directly squeezing the tooth groove of the inner ring of the slewing bearing.

[0007] Preferably, a movable rail is provided in the recess on the other side of the transmission block, and a second threaded rod is provided laterally inside the movable rail, which passes through the first clamping piece. The outer portion of the second threaded rod is threadedly engaged with the through position of the first clamping piece. The rotation of the second threaded rod and the restriction of the transmission block on the first clamping piece can make the first clamping piece move laterally and adjust its position. After the first clamping piece is adjusted in position, it is used to clamp the inner ring of the slewing bearing with the second clamping piece.

[0008] Preferably, five limiting blocks are evenly distributed laterally between the movable rail and the second clamping piece. The limiting blocks continuously move toward the tooth groove of the inner ring of the slewing bearing. After continuous movement, the limiting blocks will be embedded in the tooth groove of the inner ring of the slewing bearing. The embedding of the limiting blocks can facilitate the fixation of the inner ring of the slewing bearing.

[0009] Preferably, the lower ends of the five limiting blocks are each provided with a mounting groove, and a transmission plate is laterally provided at the lower end of the mounting groove. The transmission plate is welded with a spring toward the inside of the mounting groove, and the rotation of the first threaded rod can continuously move toward the inside of the transmission block. After continuously moving toward the inside of the transmission block, the transmission plate can be pushed to move longitudinally upward, and the longitudinal upward movement of the transmission plate can be driven by the spring to push the limiting block.

[0010] Preferably, the lower end of the transmission plate passes through the transmission block and extends to the lower end of the transmission block, where a first threaded rod is provided. The penetration position of the transmission block cooperates with the external thread of the first threaded rod. The transmission plate can be transmitted and supported by passing the first threaded rod through the transmission block, and the transmission and support can also facilitate the transmission of the transmission plate.

[0011] Preferably, the mounting hole inside the second clamping piece overlaps with the circular mounting hole inside the first clamping piece, and the overlapping mounting holes facilitate the insertion of bolts to fix the position of the slewing bearing inner ring and the transmission block.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0013] When the utility model fixes the inner ring and the outer ring of the slewing bearing and performs a bearing force test, the inner ring of the slewing bearing is first clamped by the first clamping piece and the second clamping piece after relative movement. Then, a bolt is passed through the mounting hole and the hole reserved in the inner ring of the slewing bearing to perform connection. Then, the first threaded rod is rotated to push the limiting block through the spring, and the limiting block is pushed and moves toward the tooth groove of the inner ring of the slewing bearing. The limiting block adapts to the tooth groove shape and further improves the stability of the connection. The inner ring of the slewing bearing is clamped and fixed without damaging the tooth groove, thereby improving the accuracy of the bearing force test of the slewing bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a three-dimensional diagram of the overall external structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the position relationship of the first clamping piece of the present invention;

[0016] Figure 3 This is a cross-sectional view of the transmission structure of the transmission plate of the present utility model;

[0017] Figure 4 For the utility model Figure 3 A partial enlarged view of area A in the middle;

[0018] Figure 5 This is a cross-sectional view of the first clamping piece transmission structure of the present utility model.

[0019] In the figure: 1. Extrusion block; 2. Connecting plate; 3. Hydraulic telescopic rod; 4. Transmission block; 5. First clamping plate; 6. Second clamping plate; 7. Mounting hole; 8. Movable rail; 9. Limiting block; 10. First threaded rod; 11. Transmission plate; 12. Mounting slot; 13. Spring; 14. Second threaded rod. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to specific embodiments.

[0021] Example 1

[0022] like Figure 1 As shown, a bearing force testing machine for a slewing bearing in this embodiment includes an extrusion block 1. A pair of extrusion blocks 1 are arranged in a transverse mirror image. The pair of extrusion blocks 1 can move relative to each other to fit the outer ring of the slewing bearing. After the extrusion blocks 1 fit the outer ring of the slewing bearing, it can be initially fixed. A connecting piece 2 is provided in the middle position between the two extrusion blocks 1. A motor is provided in a circular position at one end of the connecting piece 2. After the inner part of the slewing bearing is fixed to the outer part of the connecting piece 2 and between the pair of extrusion blocks 1, the rotation of the connecting piece 2 can drive the externally fixed slewing bearing to rotate. After the inner and outer rings of the slewing bearing rotate relative to each other, it is convenient to insert a gap detection needle for subsequent detection to test the bearing force test of the slewing bearing.

[0023] Among them, four hydraulic telescopic rods 3 are evenly distributed around the outside of the connecting piece 2, and one end of the four hydraulic telescopic rods 3 is provided with a transmission block 4. The transmission block 4, the hydraulic telescopic rod 3 and the connecting piece 2 are fixedly connected in sequence by bolts, and the inner ring of the slewing bearing is fixed by the position of the transmission block 4 to facilitate subsequent transmission;

[0024] In addition, if Figure 2 and Figure 3 As shown, a second clamping piece 6 is provided on one side of the upper end of the transmission block 4, and the second clamping piece 6 is welded and fixed to the transmission block 4. A first clamping piece 5 is provided on the other side of the upper end of the transmission block 4. The first clamping piece 5 moves toward the second clamping piece 6, and the second clamping piece 6 and the first clamping piece 5 can clamp the inner ring of the slewing bearing;

[0025] The other side of the transmission block 4 is recessed with a movable rail 8, and the first clamping piece 5 is embedded in the movable rail 8 and slidably connected to the movable rail 8. During the lateral movement of the first clamping piece 5, the first clamping piece 5 will slide laterally along the movable rail 8. Figure 5 As shown, a second threaded rod 14 is laterally arranged inside the movable rail 8, and the second threaded rod 14 passes through the first clamping piece 5 and extends to both sides of the first clamping piece 5. The penetration position inside the first clamping piece 5 cooperates with the external thread of the second threaded rod 14. When the inner ring of the slewing bearing is fixed, rotating the second threaded rod 14 can drive the first clamping piece 5 to move laterally inside the movable rail 8;

[0026] In order to facilitate the connection between the first clamping piece 5 and the second clamping piece 6 and the inner ring of the slewing bearing, as shown in FIG. Figure 1 and Figure 2 As shown, the second clamping piece 6 and the first clamping piece 5 are both provided with mounting holes 7, and the mounting holes 7 pass through and extend to the front and rear ends of the second clamping piece 6 and the first clamping piece 5. Subsequent bolts pass through the pair of mounting holes 7 and the holes reserved in the slewing bearing inner ring to fix the slewing bearing inner ring;

[0027] Among them, in order to adapt to the tooth grooves of different slewing bearing inner rings, such as Figure 3 and Figure 4 As shown, five limiting blocks 9 are evenly distributed laterally between the movable rail 8 and the second clamping piece 6. By pushing the limiting blocks 9, the limiting blocks 9 can be moved toward the tooth grooves of the inner ring of the slewing bearing. After the limiting blocks 9 are embedded in the tooth grooves, the stability of the connection to the inner ring of the slewing bearing can be further improved.

[0028] In addition, the lower ends of the five limiting blocks 9 are each provided with a mounting groove 12, and a transmission piece 11 is laterally provided at the lower end of the mounting groove 12. A spring 13 is provided on the transmission piece 11 toward the inside of the mounting groove 12, and the two ends of the spring 13 are respectively welded to the limiting block 9 and the transmission piece 11. After pushing the transmission piece 11, the transmission piece 11 can push the limiting block 9 through the spring 13. After being pushed, the limiting block 9 can move toward the tooth groove of the inner ring of the slewing bearing. After colliding with the tooth groove of the inner ring of the slewing bearing, the resilience of the spring 13 can stop the limiting block 9 from extending and retracting and adapt the tooth groove.

[0029] In order to facilitate the pushing of the transmission plate 11, as Figure 1 and Figure 4 As shown, a first threaded rod 10 is provided at the lower end of the transmission plate 11. The first threaded rod 10 passes through the transmission block 4 and extends to the lower end of the transmission block 4. The penetration position of the transmission block 4 cooperates with the external thread of the first threaded rod 10. Through the rotation of the first threaded rod 10 and the restriction of the transmission block 4 on the transmission plate 11, the transmission plate 11 is able to push the upper end restriction block 9 to move longitudinally.

[0030] Working principle: After using the device and fixing the slewing bearing, a pair of extrusion blocks 1 move relative to each other to squeeze and fix the outer wall of the slewing bearing, and at the same time, the four hydraulic telescopic rods 3 are started. The extension of the four hydraulic telescopic rods 3 can push the transmission block 4, and push the transmission block 4 toward the inner wall of the slewing bearing until the mounting hole 7 inside the second clamping piece 6 overlaps with the hole for connection of the inner ring of the slewing bearing, and the second threaded rod 14 is rotated. The rotation of the second threaded rod 14 is restricted by the transmission block 4, which can make the first clamping piece 5 slide horizontally. The first clamping piece 5 and the second clamping piece 6 can clamp the inner ring of the slewing bearing, and the bolts pass through the mounting holes 7 inside the first clamping piece 5 and the mounting holes inside the second clamping piece 6 in turn. After the mounting hole 7 and the connecting hole of the inner ring of the slewing bearing are connected, the inner ring of the slewing bearing is connected, and the first threaded rod 10 is rotated. The rotation of the first threaded rod 10 can push the limiting block 9 connected by the spring 13 through the transmission plate 11, so that the limiting block 9 extends from the transmission block 4, extends and moves toward the tooth groove of the inner ring of the slewing bearing. With the continuous rotation of the first threaded rod 10, the limiting block 9 can be embedded in the inside of the tooth groove of the inner ring of the slewing bearing, further improving the connection with the inner ring of the slewing bearing. The motor drives the connecting piece 2 to rotate, and the rotation of the connecting piece 2 can drive the inner ring of the slewing bearing to rotate. During rotation, the gap detector at the front end of the connecting piece 2 detects the gap of the slewing bearing, and the width data of the gap are recorded and analyzed.

[0031] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0032] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A bearing force testing machine for a slewing bearing, comprising a pair of extrusion blocks (1) arranged laterally, characterized in that: A connecting piece (2) is provided at the middle position between the two extrusion blocks (1), four hydraulic telescopic rods (3) are evenly distributed around the outside of the connecting piece (2), one end of each of the four hydraulic telescopic rods (3) is provided with a transmission block (4), a second clamping piece (6) having a mounting hole (7) is welded to one side of the upper end of the transmission block (4), and a first clamping piece (5) having a mounting hole (7) is provided on the other side of the second clamping piece (6).

2. A slewing bearing bearing force testing machine according to claim 1, characterized in that: A movable rail (8) is provided in a recessed manner on the other side of the transmission block (4), and a second threaded rod (14) is transversely provided inside the movable rail (8) and passes through the first clamping piece (5), and the outer portion of the second threaded rod (14) is threadedly engaged with the passing position of the first clamping piece (5).

3. A slewing bearing bearing force testing machine according to claim 2, characterized in that: Five limiting blocks (9) are evenly distributed laterally between the movable rail (8) and the second clamping piece (6).

4. A slewing bearing bearing force testing machine according to claim 3, characterized in that: The lower ends of the five limiting blocks (9) are each provided with a mounting groove (12), the lower ends of the mounting grooves (12) are laterally provided with a transmission plate (11), and the transmission plate (11) is welded with a spring (13) toward the inside of the mounting grooves (12).

5. The bearing force testing machine for a slewing bearing according to claim 4, characterized in that: The lower end of the transmission plate (11) passes through the transmission block (4) and extends to the lower end of the transmission block (4) where a first threaded rod (10) is provided. The penetration position of the transmission block (4) cooperates with the external thread of the first threaded rod (10).

6. The bearing force testing machine for a slewing bearing according to claim 1, characterized in that: The mounting hole (7) inside the second clamping piece (6) overlaps with the mounting hole (7) inside the first clamping piece (5) in circular position.

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