Axial force transmission device applied to bearing detection platform

Abstract

The utility model discloses an axial force transmission device applied to a bearing detection platform. The axial force transmission device comprises a rack, a hydraulic oil cylinder, a mounting rack and a force transmission assembly, the force transmission assembly includes: a mounting housing; an ejector rod is rotationally mounted in the mounting shell; one end of the ejector rod is in butt joint with a cylinder rod of the hydraulic oil cylinder, and the other end extends out of the mounting shell and is in butt joint with a stress end of the to-be-tested bearing; a thrust bearing and a radial bearing are arranged in the mounting shell; the thrust bearing and the radial bearing are arranged on the periphery of the ejector rod in a sleeving mode, and the thrust bearing is located between the radial bearing and a cylinder rod of the hydraulic oil cylinder. The ejector rod forms an ejector ring between the thrust bearing and the radial bearing; the thrust bearing and the radial bearing abut against the two sides of the top ring respectively. The axial force transmission device applied to the bearing detection platform can effectively reduce the rotation friction force between the bearing to be detected and the hydraulic oil cylinder, thereby ensuring the detection precision of the radial loading force of the bearing to be detected.

Description

Technical Field

[0001] The utility model relates to an axial force transmission device applied to a bearing detection platform. Background Art

[0002] The sliding bearing is a non-standard part, and there are specific requirements for the performance of the sliding bearing in some specific occasions. If the sliding bearing is directly used without being tested, and some of its parameters do not meet the standards and are applied to the transmission structure, it will have a great impact on the transmission accuracy and structural reliability of the transmission structure. Therefore, it is necessary to test the applied bearing to detect its maximum load, rotational speed, and temperature change, so as to ensure that the bearing can be suitable for the required working conditions.

[0003] In the prior art, the radial load detection of the bearing to be tested is carried out by applying pressure through an oil cylinder. However, during the test, the test bearing is in a rotating state, while the piston rod of the oil cylinder does not rotate and only plays a role in pushing and applying the load. This results in a large rotational friction force between the two, which will affect the test data of the radial load force of the bearing to be tested, thereby affecting the detection accuracy. Summary of the Utility Model

[0004] The utility model provides an axial force transmission device applied to a bearing detection platform to solve the above-mentioned technical problems, and specifically adopts the following technical solutions:

[0005] An axial force transmission device applied to a bearing detection platform includes: a frame for installing the bearing to be tested, a hydraulic cylinder for applying axial thrust to the bearing to be tested, and a mounting frame for installing the hydraulic cylinder; a force transmission component for transmitting the thrust of the hydraulic cylinder is installed between the mounting frame and the bearing to be tested; the force transmission component includes: a mounting housing; a push rod for force transmission to axially press the bearing to be tested is rotatably installed in the mounting housing; one end of the push rod is butt-connected to the cylinder rod of the hydraulic cylinder, and the other end extends out of the mounting housing and is butt-connected to the force-receiving end of the bearing to be tested; a thrust bearing for evenly dispersing the top force of the hydraulic cylinder in the circumferential direction of the push rod and reversely transmitting the reverse thrust and a radial bearing for concentrating the top force of the hydraulic cylinder on the push rod and axially transmitting it to the bearing to be tested are arranged in the mounting housing; both the thrust bearing and the radial bearing are sleeved on the outer periphery of the push rod, and the thrust bearing is located between the radial bearing and the cylinder rod of the hydraulic cylinder; a top ring for transmitting thrust is formed between the thrust bearing and the radial bearing on the push rod; the thrust bearing and the radial bearing are respectively abutted against both sides of the top ring.

[0006] Further, a top block for abutting and pushing the mounting housing to drive the whole mounting housing to advance is provided at one end of the mounting housing away from the bearing to be measured; a part of the cylinder rod of the hydraulic cylinder is inserted into a round hole formed in the top block, and a pushing step for pushing the top block is formed; the pushing step abuts against the side wall of the top block.

[0007] Further, the mounting housing is formed with a mounting hole for limiting the axial stroke of the top block; the top block is fixedly arranged in the mounting hole by screws.

[0008] Further, the mounting bracket is provided with a support cushion block for supporting the mounting housing on the lower side of the mounting housing.

[0009] Further, the support cushion block is a cushion block made of polytetrafluoroethylene.

[0010] Further, the radial bearing is a deep groove ball bearing.

[0011] Further, the thrust bearing is a tapered roller thrust bearing.

[0012] Further, a limiting groove is formed at the force-bearing end of the bearing to be measured; one end of the ejector rod is formed with a top end for adapting to the limiting groove to allow relative rotation between the ejector rod and the force-bearing end of the bearing to be measured.

[0013] Further, the limiting groove is a tapered groove; the top end is tapered.

[0014] The beneficial effect of the present utility model lies in that the axial force transmission device applied to the bearing detection platform provided adopts a force transmission component, which can effectively reduce the rotational friction force between the bearing to be measured and the hydraulic cylinder, thereby avoiding the large influence of the rotational friction force on the test data of the radial load force of the bearing to be measured, and further ensuring the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model, and for those of ordinary skill in the art, other drawings can be obtained according to these drawings without creative efforts.

[0016] Figure 1 is a schematic diagram of the installation of the axial force transmission device applied to the bearing detection platform involved in the present application;

[0017] Figure 2 is Figure 1 a schematic diagram of the internal structure of the axial force transmission device applied to the bearing detection platform in

[0018] Axial force transmission device 10 applied to a bearing detection platform, frame 11, hydraulic cylinder 12, cylinder rod 121, pushing step 122, mounting bracket 13, support pad 131, force transmission component 14, mounting housing 141, mounting hole 1411, ejector rod 142, ejector ring 1421, top end 1422, thrust bearing 143, radial bearing 144, top block 145, force-receiving end 20, limiting groove 201. Detailed implementation mode

[0019] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention.

[0020] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher horizontal height than the second feature. The first feature being "below", "under", and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the first feature is at a lower horizontal height than the second feature.

[0022] Such as Figures 1 to 2As shown in the figure, an axial force transmission device 10 applied to a bearing detection platform of the present application includes: a hydraulic cylinder 12 and a bearing to be tested. The bearing to be tested is installed on a frame 11, and the hydraulic cylinder 12 is installed on a mounting bracket 13. During installation, the hydraulic cylinder 12 is installed on one side of the bearing to be tested through the mounting bracket 13. In this way, an axial thrust is applied to the connection end, i.e., the force receiving end 20, of the bearing to be tested through the output end of the hydraulic cylinder 12, and the radial load force of the bearing to be tested can be detected. A force transmission component 14 is installed between the hydraulic cylinder 12 and the bearing to be tested. Through the force transmission component 14, the thrust of the hydraulic cylinder 12 can be transmitted, and at the same time, the rotational friction force between the hydraulic cylinder 12 and the force receiving end 20 of the bearing to be tested can be reduced. In this way, the rotational friction force between the bearing to be tested and the hydraulic cylinder 12 is effectively reduced, and the influence of the rotational friction force on the test data of the radial load force of the bearing to be tested can be avoided, thereby ensuring the detection accuracy.

[0023] Specifically, the force transmission component 14 includes: a mounting housing 141. A push rod 142 is rotatably installed in the mounting housing 141. One end of the push rod 142 is butt-connected to the cylinder rod 121 of the hydraulic cylinder 12, and the other end extends out of the mounting housing 141 and is butt-connected to the force receiving end 20 of the bearing to be tested. In this way, the thrust of the hydraulic cylinder 12 can be transmitted to the force receiving end 20 of the bearing to be tested, so as to axially press the bearing to be tested to detect the radial load force of the bearing to be tested. A thrust bearing 143 and a radial bearing 144 are arranged in the mounting housing 141. Both the thrust bearing 143 and the radial bearing 144 are sleeved on the outer periphery of the push rod 142, and the thrust bearing 143 is located between the radial bearing 144 and the cylinder rod 121 of the hydraulic cylinder 12. A top ring 1421 is formed between the thrust bearing 143 and the radial bearing 144 on the push rod 142 for transmitting thrust, and the thrust bearing 143 and the radial bearing 144 are respectively abutted on both sides of the top ring 1421.

[0024] Specifically, when the hydraulic cylinder 12 applies an axial thrust, the thrust bearing 143 can evenly disperse the jacking force of the hydraulic cylinder 12 in the circumferential direction of the ejector rod 142, that is, distribute it on the top ring 1421, so as to ensure the stability of the overall advancement of the ejector rod 142. Then, the radial bearing 144 aggregates the jacking force of the hydraulic cylinder 12 on the ejector rod 142 and makes the thrust drive the ejector rod 142 to jack against the stressed end 20 of the bearing under test along the axial direction of the ejector rod 142, thereby realizing the transfer of the thrust of the hydraulic cylinder 12 to the bearing under test. In this process, the radial bearing 144 defines the pushing stroke of the ejector rod 142. The force transmission assembly 14 stably and with low loss transfers the overall thrust of the hydraulic cylinder 12 to the bearing under test, with high force application accuracy, improving the load force detection accuracy. At the same time, the ejector rod 142 can rotate relative to the bearing under test and the hydraulic cylinder 12. Then, during the rotation of the bearing under test, the ejector rod 142 can be driven to rotate, which can be understood as changing the direct sliding friction in the prior art into rolling friction, reducing the frictional force, and thus improving the detection accuracy of the radial load force of the bearing under test.

[0025] In this solution, the radial bearing 144 is a deep groove ball bearing with high radial force-bearing strength. The thrust bearing 143 is a tapered roller thrust bearing 143 with strong transfer capabilities of converging and dispersing radial and axial forces. During the rotation of the bearing under test, the thrust bearing 143 contacts the top ring 1421. The thrust bearing 143 can dispersedly receive the reaction force brought by the bearing under test during the application of the load, thereby improving the structural strength of the force transmission assembly 14 and being not easily damaged due to high thrust.

[0026] As a specific implementation manner, a top block 145 is provided at one end of the mounting housing 141 away from the bearing under test. The top block 145 is used to abut and push the mounting housing 141, thereby transferring the thrust of the hydraulic cylinder 12 to the mounting housing 141, and then applying a thrust to the bearing under test through the ejector rod 142. A part of the cylinder rod 121 of the hydraulic cylinder 12 is inserted into a circular hole formed in the top block 145, and the cylinder rod 121 is also formed with a pushing step 122. By abutting the pushing step 122 against the side wall of the top block, the top block 145 can be stably pushed, thereby pushing the above-mentioned mounting housing 141. The mounting housing 141 drives the ejector rod 142 to advance through the thrust bearing 143, the top ring 1421, and the radial bearing 144, and the radial bearing 144 defines the ejector rod 142 to apply a thrust to the stressed end 20 of the bearing under test along the axial direction.

[0027] Specifically, the mounting housing 141 is formed with a mounting hole 1411 for fixing the top block 145, and the top block 145 is fixed in the mounting hole 1411 by screws.

[0028] As a specific implementation manner, the mounting bracket 13 is provided with a support cushion block 131 on the lower side of the mounting housing 141 for supporting the mounting housing 141. The support cushion block 131 is a cushion block made of polytetrafluoroethylene, and the support structure has high stability. The force transmission assembly 14 of this solution is not fixed on the mounting bracket 13. Since there is an installation gap between the part of the cylinder rod 121 of the hydraulic cylinder 12 inserted into the top block 145 and the inner wall of the round hole of the top block 145, and the cylinder rod 121, the mounting housing 141, and the ejector rod 142 are all rotatable connection structures that can rotate relative to each other. In this way, during the micro-movement of the bearing under test in the vertical direction, the force transmission device can synchronously micro-move with it, thereby ensuring the accuracy of the thrust action and further ensuring the accuracy of the test results.

[0029] As a specific implementation manner, a limiting groove 201 is formed at the force-receiving end 20 of the bearing under test, and one end of the ejector rod 142 is formed with a top end 1422, and the top end 1422 is adapted to the limiting groove 201 to allow relative rotation between the ejector rod 142 and the force-receiving end 20 of the bearing under test, so as to reduce the influence of friction.

[0030] Specifically, the above-mentioned limiting groove 201 is a tapered groove, and the above-mentioned top end 1422 is tapered, and the friction force of the tapered pressing structure is smaller.

[0031] In this solution, a force measuring sensor is further provided between the hydraulic cylinder 12 and the force transmission assembly 14 to detect the actual thrust of the hydraulic cylinder 12.

[0032] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the above embodiments do not limit the present invention in any form. Any technical solutions obtained by means of equivalent replacement or equivalent transformation fall within the protection scope of the present invention.

Claims

1. An axial force transmission device applied to a bearing detection platform, comprising: A frame for mounting a bearing to be tested, a hydraulic cylinder for applying axial thrust to the bearing to be tested, and a mounting frame for mounting the hydraulic cylinder; characterized in that: The mounting frame is provided with a force transmission component for transmitting the thrust of the hydraulic cylinder between the hydraulic cylinder and the bearing to be tested; The force transfer assembly includes: a mounting housing; A push rod for transmitting force to axially pressurize the bearing to be tested is rotatably installed in the installation housing; One end of the mounting housing is butt-jointed with the cylinder rod of the hydraulic cylinder, and one end of the push rod extends out of the mounting housing and is butt-jointed with the force-bearing end of the bearing to be tested; The mounting housing is provided with a thrust bearing for evenly dispersing the jacking force of the hydraulic cylinder in the circumferential direction of the push rod and transmitting the reverse thrust in the reverse direction, and a radial bearing for gathering the jacking force of the hydraulic cylinder on the push rod and transmitting it to the bearing to be tested along the axial direction of the push rod; The thrust bearing and the radial bearing are both sleeved on the outer circumference of the push rod, and the thrust bearing is located between the radial bearing and the cylinder rod of the hydraulic cylinder; The push rod is formed with a push ring between the thrust bearing and the radial bearing for transmitting thrust; The thrust bearing and the radial bearing are respectively disposed on both sides of the top ring in abutment with each other.

2. The axial force transmission device applied to the bearing detection platform according to claim 1 is characterized in that: An end of the mounting shell away from the bearing to be tested is provided with a top block for resisting and pushing the mounting shell to drive the mounting shell to advance as a whole; A portion of the cylinder rod of the hydraulic oil cylinder is inserted into a circular hole formed in the top block, and a pushing step for pushing the top block is formed; The pushing step abuts against the side wall of the top block.

3. The axial force transmission device applied to the bearing detection platform according to claim 2 is characterized in that: The mounting housing is formed with a mounting hole for limiting the axial travel of the top block; The top block is fixed in the mounting hole by screws.

4. The axial force transmission device applied to the bearing detection platform according to claim 1 is characterized in that: The mounting frame is provided with a supporting pad block for supporting the mounting shell at the lower side of the mounting shell.

5. The axial force transmission device applied to the bearing detection platform according to claim 4 is characterized in that: The supporting pad is a pad made of polytetrafluoroethylene.

6. The axial force transmission device applied to the bearing detection platform according to claim 1 is characterized in that: The radial bearing is a deep groove ball bearing.

7. The axial force transmission device applied to the bearing detection platform according to claim 1 is characterized in that: The thrust bearing is a tapered roller thrust bearing.

8. The axial force transmission device applied to the bearing detection platform according to claim 1, characterized in that: A limit groove is formed at the force-bearing end of the bearing to be tested; One end of the push rod is formed with a top end for fitting into the limiting groove to allow relative rotation between the push rod and the force-bearing end of the bearing to be tested.

9. The axial force transmission device applied to the bearing detection platform according to claim 8, characterized in that: The limiting groove is a tapered groove; The top end is conical.

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