Finished product height measuring gauge for tapered roller bearing outer ring finished product

Abstract

The utility model discloses a finished product height measuring gauge for a tapered roller bearing outer ring finished product, which relates to the field of bearing detection and comprises a measuring instrument, a finished product height cushion block and a standard entity inner assembly used for simulating an inner assembly structure of a tapered roller bearing. An arc surface is arranged on the outer wall of the standard entity inner assembly, and the arc surface is matched with the inner wall surface of the to-be-detected outer ring, so that the to-be-detected outer ring is in contact with and sleeves the arc surface of the standard entity inner assembly; the finished product height cushion block contacts and is placed on the upper end face of the to-be-measured outer ring, the measuring instrument is arranged perpendicular to the finished product height cushion block, and a meter head of the measuring instrument contacts with the top of the finished product height cushion block. The problem that a standard inner assembly is difficult to manufacture is solved; and meanwhile, the problem of relatively large repeatability error is solved, and the influence of the error of the standard inner component on the accuracy of the measurement result is avoided.

Description

Technical Field

[0001] The utility model relates to the field of bearing detection, in particular to a finished product height measuring tool for a finished product outer ring of a tapered roller bearing. Background Art

[0002] like Figures 1 to 4 As shown:

[0003] T: Finished product height of the outer ring of the tapered roller bearing; di: Raceway diameter of the inner ring of the tapered roller bearing;

[0004] β: raceway angle of the inner ring of the tapered roller bearing; a0: rib thickness of the inner ring of the tapered roller bearing;

[0005] E: tapered roller bearing outer ring raceway size; α: tapered roller bearing outer ring raceway angle;

[0006] Dw: roller diameter; Roller angle; The angle between the outer ring raceway and the roller contact surface.

[0007] The formula for the finished height of the tapered roller bearing is:

[0008]

[0009] From the above formula, we can know that:

[0010] Based on the product design, the parameters that affect the finished outer ring height T include E, α, a0, Dw, The sixth parameter.

[0011] in:

[0012] E and α are the parameters of the outer ring;

[0013] a0 and di are the parameters of the inner circle;

[0014] Dw, are the parameters of the roller.

[0015] from Figure 1 It can be seen that the tapered roller bearing is a separable bearing. The outer ring (1') and the inner assembly (i.e. the inner ring 4', roller 3', and cage 2' combination) are separable. It is precisely because of the separable characteristics of the tapered roller bearing that in actual application, such as Figure 5 , 6 As shown, there is a situation where a model of tapered roller bearing is divided into two parts, the outer ring finished product (5') and the inner component finished product (6'), and assembled on different production lines. Therefore, it is necessary to control the finished product height of the outer ring finished product and the finished product height of the inner component finished product separately to ensure that the finished product height of any outer ring finished product and the inner component finished product after being assembled meets the requirements.

[0016] Normally, the standard outer ring is used to detect the finished product height of the inner component, and the standard inner component is used to detect the finished product height of the outer ring. The control requirements for the standard outer ring and standard inner component inspection can be calculated by formula (1). The finished outer ring and the finished inner component that have passed the standard inner component and standard outer ring inspection can be interchanged and assembled at will, and the finished product height meets the requirements.

[0017] However, the standard inner components are used to detect the finished product height of the outer ring. The standard inner components consist of three parts: inner ring, roller and cage. The large number of components will make it difficult to make the standard inner components. Generally, products with good precision are selected from the products as standard devices. It is too expensive to make standard inner components alone. At the same time, due to the large number of components, the repeatability error is relatively large, especially in products with large outer ring angle α. Utility Model Content

[0018] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a finished product height measuring fixture for the outer ring of a tapered roller bearing to solve the problem of difficulty in making standard inner components; at the same time, it solves the problem of large repeatability errors and avoids the influence of the errors of the standard inner components on the accuracy of the measurement results.

[0019] The purpose of the utility model is achieved through the following technical scheme: the finished product height measuring gauge of the finished product outer ring of the tapered roller bearing comprises a measuring instrument, a finished product height pad and a standard entity inner component, the standard entity inner component is used to simulate the inner component structure of the tapered roller bearing, an arc surface is arranged on the outer wall of the standard entity inner component, the arc surface matches the inner wall surface of the outer ring to be measured, so that the outer ring to be measured contacts and is sleeved on the arc surface of the standard entity inner component; the finished product height pad contacts and is placed on the upper end surface of the outer ring to be measured, the measuring instrument is arranged perpendicular to the finished product height pad, and the meter head of the measuring instrument contacts the top of the finished product height pad.

[0020] The beneficial effects of the utility model are as follows: through the application of standard entity internal components, the original combination of three standard parts is only required, and now only one is needed, thus avoiding the error caused by the combination of inner ring, roller and retainer. As long as the D2 value and angle α1 are controlled when designing the standard internal components, the inspection efficiency and accuracy can be effectively improved through the inspection fixture, and the difficulty of manufacturing the standard device can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a tapered roller bearing in the prior art.

[0022] Figure 2 It is a structural schematic diagram of the inner ring in the prior art.

[0023] Figure 3It is a structural schematic diagram of the outer ring in the prior art.

[0024] Figure 4 It is a structural schematic diagram of a roller in the prior art.

[0025] Figure 5 It is a structural schematic diagram of the outer ring finished product in the prior art.

[0026] Figure 6 It is a structural schematic diagram of a finished product of an internal component in the prior art.

[0027] Figure 7 It is a structural schematic diagram of the utility model.

[0028] Figure 8 It is a schematic diagram of the structure of the outer ring to be tested in the utility model.

[0029] Fig. 9 It is a structural schematic diagram of the components within the standard entity in the utility model.

[0030] Explanation of reference numerals: outer ring 1', retaining frame 2', roller 3', inner ring 4', finished outer ring 5', finished inner component 6'; measuring instrument 1, finished product height spacer 2, outer ring to be measured 3, inner wall surface 31, upper end surface 32, standard solid inner component 4, arc surface 41. DETAILED DESCRIPTION

[0031] The utility model will be described in detail below with reference to the accompanying drawings:

[0032] Example: As shown in the attached Figures 7 to 9 As shown, the finished product height measuring fixture of the tapered roller bearing outer ring comprises a measuring instrument 1, a finished product height spacer 2, an outer ring to be measured 3, an inner wall surface 31, an upper end surface 32, a standard solid inner component 4 and an arc surface 41.

[0033] like Fig. 9 As shown, the standard solid inner component 4 is used to simulate the inner component structure of a tapered roller bearing, replacing the original inner component consisting of three parts with only one part, thus avoiding the error caused by the combination of the inner ring, roller, and cage. Furthermore, a circular arc surface 41 is provided on the outer wall of the standard solid inner component 4, and the circular arc surface 41 matches the inner wall surface 31 of the outer ring 3 to be tested. Figure 7 As shown, during the test, the outer ring 3 to be tested contacts and is mounted on the arc surface 41 of the standard solid inner component 4; at the same time, the finished product height block 2 contacts and is placed on the upper end surface 32 of the outer ring 3 to be tested, the measuring instrument 1 is arranged perpendicular to the finished product height block 2, and the meter head of the measuring instrument 1 contacts the top of the finished product height block 2.

[0034] The inspection steps of the utility model are as follows:

[0035] 1. Measure the D2 value (i.e. the raceway size of the standard entity inner component) and the angle α1 (i.e. the raceway angle of the standard entity inner component) of the standard entity inner component 4 to obtain the measured value, and the finished product height detection range of the outer ring can be obtained by calculating the formula T=D2*E. Specifically, E is the common name for the upper and lower difference of the outer ring raceway diameter, generally expressed as Emax\Emin. By calculating the range, the product is qualified within this range, and unqualified if it exceeds it.

[0036] 2. Align the finished height block with the height gauge block and remove the correction value. For example, if a 25mm height gauge block is actually made to be 24.975mm, then its correction value is -0.025. Aligning the gauge to -0.025 is the correct value for the height of 25.

[0037] 3. Fit the physical standard inner component 4 and the outer ring together for inspection. The actual measurement range is as shown in step 1.

[0038] The present invention mainly changes the original standard inner assembly consisting of the inner ring, roller and cage into a solid block inner assembly ( Figure 4 ), reduce the errors caused by the inner ring, roller, and inspection process, and calculate the finished product height range of the outer ring by marking the actual measured values ​​of the entity inner component dimensions, which can intuitively reflect the finished product height value.

[0039] It is understandable that, for those skilled in the art, any equivalent replacement or change to the technical solution and the concept of the utility model should fall within the protection scope of the claims attached to the utility model.

Claims

1. A finished product height measuring fixture for a tapered roller bearing outer ring, characterized in that: The invention comprises a measuring instrument (1), a finished height pad (2) and a standard entity inner component (4), wherein the standard entity inner component (4) is used to simulate the inner component structure of the tapered roller bearing, and an arc surface (41) is arranged on the outer wall of the standard entity inner component (4), and the arc surface (41) matches the inner wall surface (31) of the outer ring (3) to be measured, so that the outer ring (3) to be measured contacts and is sleeved on the arc surface (41) of the standard entity inner component (4); the finished height pad (2) contacts and is placed on the upper end surface (32) of the outer ring (3) to be measured, and the measuring instrument (1) is arranged perpendicular to the finished height pad (2), and the meter head of the measuring instrument (1) contacts the top of the finished height pad (2).

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