Hub oil seal journal sticking force detection tool

Abstract

The utility model relates to a hub oil seal journal sticking force detection tool, and relates to the detection tool technology field, the hub oil seal journal sticking force detection tool comprises an inner disc, an outer disc and a tension meter, the inner disc and the outer disc are coaxially arranged, the inner disc and the outer disc are rotatably connected, a gap is reserved between the inner disc and the outer disc, an oil seal is arranged in the gap, and when the inner disc and the outer disc do not have external force, the tension meter is arranged on the inner disc and the outer disc. Relative fixation is kept due to the oil seal effect; and one end of the tension meter is connected with the outer disc. The hub oil seal journal sticking force detection tool disclosed by the utility model is visual in measurement and strong in applicability.

Description

Technical Field

[0001] The utility model relates to a detection tool, in particular to a wheel hub oil seal axle holding force detection tool. Background Art

[0002] Oil seals are sealing components, which are simply used to seal lubricating oil and grease. During the use of seals, their sealing performance and leakage rate under service conditions are directly related to the contact pressure of the sealing interface. Since the contact pressure of the seal in the circumferential direction is difficult to measure directly, the contact pressure is generally determined by measuring the shaft holding force.

[0003] The Chinese utility model patent with publication number CN204286657U discloses an oil seal shaft holding force test device, which adopts the method of overall simulated shaft. When the oil seal moves at a uniform speed on the overall simulated shaft, the friction force generated by the uniform movement of the oil seal is equal to the force applied by the outside world, and the friction force is also equal to the product of the shaft holding force and the friction coefficient of the two materials. This principle is used to accurately calculate the shaft holding force.

[0004] The disadvantages of this measurement method are: (1) it is not intuitive and requires calculation to obtain the shaft seizure force; and (2) it is impossible to obtain the limit value of the shaft seizure force before the oil seal fails. Utility Model Content

[0005] Technical purpose: In order to overcome the deficiencies in the prior art, the utility model provides a wheel hub oil seal shaft force detection tooling.

[0006] Technical solution: To achieve the above-mentioned purpose, the utility model discloses a wheel hub oil seal axial force detection tooling, including a coaxially arranged inner disk and outer disk and a dynamometer, the inner disk and outer disk are rotationally connected and a gap is left between the inner disk and the outer disk, an oil seal is arranged in the gap, and the inner disk and outer disk remain relatively fixed due to the action of the oil seal when there is no external force; one end of the dynamometer is connected to the outer disk.

[0007] Preferably, it also includes a core shaft, a support ring and a support plate, the support ring is coaxially arranged with the core shaft and rotatably connected, the support plate is fixedly connected with the support ring, the outer disk is fixedly connected with the support plate; the inner disk is fixedly connected with the core shaft.

[0008] Preferably, a deep groove ball bearing is installed between the circumferential surface of the support ring and the circumferential surface of the core shaft; and a plane bearing is installed between the end surface of the support ring and the step surface of the core shaft.

[0009] Preferably, the inner disc includes a first tire and a second tire, the first tire has a circular plate portion and a skirt portion extending axially, the skirt portion is provided with grooves in an array along the circumferential direction; the second tire has an outer conical surface, the inner surface of the skirt portion has an inner conical surface that matches the second tire, and the outer conical surface and the inner conical surface fit each other.

[0010] Preferably, a sealing ring is provided on the surface of the outer disk that contacts the oil seal.

[0011] Preferably, the upper surface of the outer disk is provided with a protruding column for connecting with a dynamometer.

[0012] Preferably, the bottom of the mandrel is connected to a base.

[0013] The utility model discloses a wheel hub oil seal axle holding force detection tool, which has the following technical effects:

[0014] (1) Use a dynamometer to record the scale value when the inner and outer disks begin to rotate relative to each other. At the same time, record the scale value of the dynamometer when the outer disk is pulled without the oil seal installed. The difference between the two recorded scale values ​​is the shaft holding force of the oil seal. The measurement method is simple and intuitive.

[0015] (2) The inner plate is formed by using the first and second expanding tires, and the oil seal is fixed by the first and second expanding tires, which is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional view of the utility model;

[0017] Figure 2 This is the structural explosion diagram of the inner disk;

[0018] Figure 3 This is a schematic diagram of the principle of measuring the oil seal shaft force.

[0019] In the figure, 1. inner plate; 2. outer plate; 3. dynamometer; 4. oil seal; 5. tightening bolt; 6. core shaft; 7. support ring; 8. support plate; 9. deep groove ball bearing; 10. plane bearing; 11. first expansion tire; 12. second expansion tire; 13. plate part; 14. skirt part; 15. slot; 16. sealing ring; 17. boss; 18. base. DETAILED DESCRIPTION

[0020] The following is combined with Figure 1 To Attachment Figure 3 The principles and features of the present invention are described, and the examples given are only used to explain the present invention, and are not used to limit the scope of the present invention.

[0021] A wheel hub oil seal shaft holding force detection tool comprises an inner disc 1, an outer disc 2, a dynamometer 3, a core shaft 6, a support ring 7, a support plate 8 and a base 18.

[0022] The inner disk 1 and the outer disk 2 are coaxially sleeved, and the outer disk 2 is arranged around the inner disk 1. A gap is left between the inner wall of the outer disk 2 and the inner wall of the outer disk 2, and an oil seal 4 to be measured for the shaft holding force is arranged in the gap. When there is no external force, the inner disk 1 and the outer disk 2 remain relatively fixed due to the action of the oil seal 4. A protrusion 17 for connecting with the dynamometer 3 is arranged on the upper surface of the outer disk 2. The outer disk 2 is pulled by the dynamometer 3 and the reading when the outer disk 2 and the inner disk 1 initially rotate relative to each other is recorded, which is recorded as F1. At the same time, the reading of the dynamometer 3 when the outer disk 2 is pulled without the oil seal 4 is recorded, which is recorded as F2. Then the shaft holding force of the oil seal 4 is F=F1-F2.

[0023] The support ring 7 is coaxially arranged with the mandrel 6 and rotatably connected. Specifically, a deep groove ball bearing 9 is installed between the circumferential surface of the support ring 7 and the circumferential surface of the mandrel 6, and a plane bearing 10 is installed between the end surface of the support ring 7 and the step surface of the mandrel 6, so as to reduce friction. The support plate 8 is fixedly connected to the support ring 7. The outer disk 2 is fixedly connected to the support plate 8, and the inner disk 1 is fixedly connected to the mandrel 6. The bottom of the mandrel 6 is connected to a base 18, so as to increase the stability of the entire device.

[0024] The inner disc 1 includes a first tire 11 and a second tire 12. The first tire 11 has a circular plate portion 13 and a skirt portion 14 extending in the axial direction. The skirt portion 14 is provided with slots 15 in an array along the circumferential direction. The second tire 12 has an outer conical surface. The inner surface of the skirt portion 14 has an inner conical surface that matches the second tire 12. The outer conical surface and the inner conical surface fit each other. The second tire 12 is fixed to the core shaft 6 by a set bolt 5. The second tire 12 opens the skirt portion 14 of the first tire 11, thereby fixing the oil seal 4. At the same time, in order to increase the friction between the outer disc 2 and the oil seal 4, an O-ring 16 is provided on the surface of the outer disc 2 that fits the oil seal 4.

[0025] The device is simple and direct in measuring the shaft holding force of the oil seal. By reading the reading when the outer disk 2 and the inner disk 1 initially rotate relative to each other, the shaft holding force of the oil seal 4 to be measured can be known.

[0026] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A wheel hub oil seal axle holding force detection tool, characterized in that: The invention comprises an inner disk (1) and an outer disk (2) which are coaxially arranged, and a tensile gauge (3); the inner disk (1) and the outer disk (2) are rotationally connected and a gap is left between the inner disk (1) and the outer disk (2); an oil seal (4) is arranged in the gap; when there is no external force, the inner disk (1) and the outer disk (2) remain relatively fixed due to the action of the oil seal (4); one end of the tensile gauge (3) is connected to the outer disk (2).

2. The wheel hub oil seal axle holding force detection tool according to claim 1, characterized in that: It also comprises a core shaft (6), a support ring (7) and a support plate (8), wherein the support ring (7) is coaxially arranged with the core shaft (6) and rotatably connected, the support plate (8) is fixedly connected to the support ring (7), the outer disk (2) is fixedly connected to the support plate (8); and the inner disk (1) is fixedly connected to the core shaft (6).

3. The wheel hub oil seal axle holding force detection tool according to claim 2, characterized in that: A deep groove ball bearing (9) is installed between the circumferential surface of the support ring (7) and the circumferential surface of the core shaft (6); and a plane bearing (10) is installed between the end surface of the support ring (7) and the step surface of the core shaft (6).

4. The wheel hub oil seal axle holding force detection tool according to claim 1, characterized in that: The inner disc (1) comprises a first tire (11) and a second tire (12), wherein the first tire (11) has a circular plate portion (13) and a skirt portion (14) extending in the axial direction, wherein the skirt portion (14) is provided with slots (15) arranged in an array along the circumferential direction; the second tire (12) has an outer conical surface, and the inner surface of the skirt portion (14) has an inner conical surface that matches the second tire (12), and the outer conical surface and the inner conical surface are in contact with each other.

5. The wheel hub oil seal axle holding force detection tool according to claim 1, characterized in that: A sealing ring (16) is provided on the surface of the outer disk (2) that contacts the oil seal (4).

6. The wheel hub oil seal axle holding force detection tool according to claim 1, characterized in that: The upper surface of the outer disk (2) is provided with a protruding column (17) for connecting with the tension gauge (3).

7. The wheel hub oil seal axle holding force detection tool according to claim 2, characterized in that: The bottom of the core shaft (6) is connected to a base (18).

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