Retarder bearing selection pad mechanism

Abstract

The utility model discloses a kind of reducer bearing pad selection mechanisms, it is related to the field of automobile reducer assembly, including dial gauge, dial gauge fixed seat, movable measuring head and fixed positioning head, dial gauge is installed on dial gauge fixed seat, dial gauge fixed seat frame is connected in the top end of fixed positioning head, the measuring head of dial gauge is downward inserted into fixed positioning head from the barrel through-hole that dial gauge fixed seat is equipped;The lower end of fixed positioning head is open end, movable measuring head is inserted into the fixed positioning head from open end place and is slidably connected in the fixed positioning head, the top end of this movable measuring head is contacted with the measuring head of dial gauge, compared with prior art, the relative height size H1 of the present application is realized to quickly measure bearing cover installation surface and bearing outer ring top and measures the relative height size H2 of bearing outer ring top and reducer shell bearing installation surface, calculate gasket thickness quickly by formula, guarantee bearing play, improve the production efficiency of this kind of reducer, reduce dismounting frequency and knock and hit risk.

Description

Technical Field

[0001] This utility model relates to the field of automotive reducer assembly technology, and in particular to a reducer bearing pad selection mechanism. Background Technology

[0002] As a crucial load-bearing component of an automotive transmission system, the reducer mainly consists of important parts such as the reducer housing 100, bearing cover 101, adjusting shims 102, bearing outer ring 103, and gears. Figure 1 As shown, the main function of the reducer is to reduce speed and increase torque during power transmission. Because the reducer operates under harsh conditions of high torque and high speed for extended periods, the control of its assembly precision, the adjustment of bearing clearance, and the protection against impacts during bearing assembly are all key process indicators affecting product reliability and service life. Among these, the proper matching of bearing clearance directly affects the reducer's transmission efficiency and operational stability, and the selection of shim thickness is the core element for achieving precise control of bearing clearance. Therefore, shim fitting is necessary to ensure that the bearing clearance meets design requirements.

[0003] However, existing technologies lack an effective process for directly and accurately determining the thickness of the adjusting shims, leading to reliance on operator experience for bearing clearance adjustment. During assembly, the operator randomly selects adjusting shims and places them at the bottom of the bearing outer ring, then assembles the bearing cover to the reducer housing. The clearance is then assessed by testing the bearing's starting force. If the starting force does not meet the preset standard (e.g., excessive force indicates the shim is too thick, insufficient force indicates the shim is too thin), the bearing cover must be removed, the bearing outer ring tapped off, and adjusting shims of different thicknesses replaced before reassembly and testing. This process requires repeated disassembly and reassembly until the bearing starting force meets the standard, resulting in cumbersome assembly procedures, low production efficiency, and a high risk of damage to the bearing outer ring from repeated disassembly and tapping, directly shortening the bearing's lifespan. Furthermore, the experience-based shim selection method leads to poor product quality consistency and unstable clearance control accuracy, making it difficult to meet the quality control requirements of large-scale mass production and hindering improvements in production efficiency and product reliability. Utility Model Content

[0004] The purpose of this invention is to provide a reducer bearing shim selection mechanism, which can solve the problem that the quality of existing reducer bearing shim selection is uncontrollable and not conducive to mass production.

[0005] To solve the above problems, the technical solution adopted by this utility model is as follows: This reducer bearing selection mechanism includes a dial indicator, a dial indicator mounting base, a movable measuring head, and a fixed positioning head. The dial indicator is mounted on the dial indicator mounting base, and the dial indicator mounting base is connected to the top of the fixed positioning head. The measuring head of the dial indicator extends downward into the fixed positioning head through a through hole provided in the dial indicator mounting base. The lower end of the fixed positioning head is an open end, and the movable measuring head extends into the fixed positioning head from the open end and slides up and down inside the fixed positioning head. The top of the movable measuring head contacts the measuring head of the dial indicator.

[0006] In the above-mentioned technical solution of the reducer bearing pad selection mechanism, a more specific technical solution can be: a limiting groove is provided symmetrically on both sides of the fixed positioning head, and a limiting pin is provided on both sides of the outer side of the movable measuring head. The limiting pin is inserted into the limiting groove, and the height of the limiting groove is greater than the thickness of the limiting pin.

[0007] In some possible implementations, the bottom of the fixed positioning head is provided with wing plates that extend to both sides, and the wing plates are provided with support feet underneath. The bottom of the movable measuring head is correspondingly provided with measuring wing plates that extend to both sides, and the measuring wing plates are provided with measuring support feet underneath.

[0008] In some possible implementations, the bottom end of the measuring support foot is an arc-shaped contact end face, which is used to make contact with the bearing bore end face or the bearing outer ring end face.

[0009] In some possible implementations, the bottom end of the support leg is a planar contact end face, which is used to make contact with the bearing cover mounting surface or the gearbox housing bearing cover mounting surface.

[0010] In some possible implementations, the dial indicator mounting base is fixedly connected to the dial indicator by fastening bolts, and the dial indicator mounting base is fixedly connected to the top of the fixed positioning head by bolts.

[0011] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art: The shim selection mechanism of this utility model consists of a dial indicator, a dial indicator base, a movable measuring head, and a fixed positioning head. It features a simple structure, controllable shim selection quality, convenient operation, and strong practicality. By measuring two key height differences, H1 and H2, and combining this with a calculation formula, the shim thickness can be quickly determined without relying on operator experience, achieving precise one-time selection of shim thickness. Compared to existing technologies, this utility model reduces the number of times the bearing cap and bearing outer ring are disassembled and assembled, increasing assembly efficiency by more than 50% and effectively reducing the risk of bearing impact damage, thus extending bearing life. Simultaneously, the standardized measurement and calculation process ensures product quality stability, fully meeting the needs of mass production and solving the problem of uncontrollable quality in existing processes. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a speed reducer in the prior art.

[0013] Figure 2 This is a schematic diagram of the structure of this utility model.

[0014] Figure 3 This is a schematic diagram of the usage state of the pad selection mechanism of this utility model when measuring H1.

[0015] Figure 4 This is a schematic diagram showing the usage state of the pad selection mechanism of this utility model when measuring H2.

[0016] In the diagram: 1. Dial indicator, 1-1. Probe, 1-2. Probe protective tube, 2. Dial indicator mounting base, 2-1. Cylinder through hole, 3. Bolt, 4. Limit pin, 5. Movable measuring head, 5-1. Measuring wing plate, 5-2. Measuring support foot, 6. Fixed positioning head, 6-1. Limit groove, 6-2. Wing plate, 6-3. Support foot, 7. Fastening bolt, 100. Reducer housing, 101. Bearing cover, 102. Adjusting shim, 103. Bearing outer ring. Detailed Implementation

[0017] To make the above-mentioned objectives, features, and advantages of this utility model more readily understood, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model; however, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0018] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "fixation," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0019] like Figure 2 The embodiment shown proposes a reducer bearing shim selection mechanism, including a dial indicator 1, a dial indicator mounting base 2, a movable measuring head 5, and a fixed positioning head 6. The dial indicator 1 is mounted on the dial indicator mounting base 2, which is supported on the top of the fixed positioning head 6. The dial indicator mounting base includes a hollow cylinder with openings at the top and bottom in the middle, and connecting plates fixedly connected to both sides of the cylinder. The connecting plates are used to connect and fix to the fixed positioning head. The measuring head 1-1 of the dial indicator 1 extends downward into the fixed positioning head 6 through the through hole 2-1 of the cylinder of the dial indicator mounting base 2. The lower end of the fixed positioning head 6 is an open end, and the movable measuring head 5... The movable measuring head 5 extends into the fixed positioning head 6 from the open end and slides up and down inside the fixed positioning head 6. The top of the movable measuring head contacts the measuring head 1-1 of the dial indicator 1, which can accurately transmit the height change of the surface to be measured to the dial indicator. Limiting grooves 6-1 are provided symmetrically on both sides of the fixed positioning head 6. Limiting pins 4 are provided on both sides of the outer side of the movable measuring head 5. The limiting pins 4 are inserted into the limiting grooves 6-1. The height of the limiting grooves 6-1 is greater than the thickness of the limiting pins 4, so that the limiting pins can move up and down in the limiting grooves. The setting of the limiting pins is to limit the movement of the movable measuring head to protect the dial indicator. The bottom of the fixed positioning head 6 is provided with wing plates 6-2 that extend to both sides. Under the wing plates are support feet 6-3. The bottom end of the support feet 6-3 is a flat contact end face, which is used to fit and contact the bearing cover mounting surface or the reducer housing bearing cover mounting surface. The bottom of the movable measuring head 5 is provided with measuring wing plates 5-1 that extend to both sides. Under the measuring wing plates are measuring support feet 5-2. The bottom end of the measuring support feet 5-2 is an arc-shaped contact end face, which is used to fit and contact the bearing hole end face or the bearing outer ring end face. A threaded hole is provided laterally on the side wall of the dial indicator fixing seat. The fastening bolt 7 is screwed into the threaded hole and abuts against the dial indicator's probe protective tube 1-2 to fix the dial indicator. The two sides of the dial indicator fixing seat 2 are fixedly connected to the top of the fixed positioning head 6 by bolts 3 to ensure the stability of the measurement reference.

[0020] like Figure 3 and Figure 4 The measurement method of the pad selection mechanism of this utility model, as shown in the embodiment, is as follows: S1: Zero point calibration of pad selection mechanism: Place the pad selection mechanism on the inspection platform, so that both the fixed positioning head and the movable measuring head are in contact with the surface of the inspection platform, adjust the dial indicator to zero point and lock the dial. S2: Measure the relative height difference between the bearing cover mounting surface and the bearing hole end face. H1: Clean the bearing hole end face of the bearing cover to remove oil, iron filings and burrs. Place the cleaned reducer bearing cover with the bearing hole facing upwards. Place the fixed positioning head of the shim selection mechanism against the bearing cover mounting surface. Insert the movable measuring head into the bearing hole end face and read the change value of the dial indicator relative to zero point. Record it as H1. S3: Measure the relative height difference between the bearing outer ring end face and the bearing cover mounting surface of the reducer housing. H2: Clean the bearing cover mounting surface and the bearing outer ring end face of the reducer housing to ensure that there are no impurities interfering with the measurement surface. Place the cleaned reducer housing upwards, so that the fixed positioning head of the shim selection mechanism is in contact with the bearing cover mounting surface of the reducer housing, and the movable measuring head is in contact with the bearing outer ring end face. Read the change value of the dial indicator relative to zero point and record it as H2. S4: Calculate the thickness of the adjusting shim H = H1 + H2, and select an adjusting shim with a thickness of H; S5: Place the selected adjusting shim inside the bearing cover at the bottom of the bearing outer ring, press the bearing outer ring into place, assemble the bearing cover into the reducer housing, tighten the bolts, and then test the bearing starting force to control the bearing clearance.

[0021] This utility model can be modified and varied in various ways. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model shall be included within the protection scope of this utility model.

Claims

1. A reducer bearing pad selection mechanism, characterized in that: The device includes a dial indicator, a dial indicator mounting base, a movable measuring head, and a fixed positioning head. The dial indicator is mounted on the dial indicator mounting base, which is connected to the top of the fixed positioning head. The measuring head of the dial indicator extends downward into the fixed positioning head through a cylindrical through-hole provided in the dial indicator mounting base. The lower end of the fixed positioning head is an open end, and the movable measuring head extends into the fixed positioning head from the open end and slides up and down within the fixed positioning head. The top of the movable measuring head contacts the measuring head of the dial indicator.

2. The reducer bearing selection shim mechanism according to claim 1, characterized in that: The fixed positioning head has symmetrically positioned limiting grooves on its two side walls, and the movable measuring head has limiting pins on its two side outer side walls. The limiting pins are inserted into the limiting grooves, and the height of the limiting grooves is greater than the thickness of the limiting pins.

3. The reducer bearing selection shim mechanism according to claim 1 or 2, characterized in that: The bottom of the fixed positioning head is provided with wing plates that extend to both sides, and the wing plates are provided with support feet. The bottom of the movable measuring head is correspondingly provided with measuring wing plates that extend to both sides, and the measuring wing plates are provided with measuring support feet.

4. The reducer bearing pad selection mechanism according to claim 3, characterized in that: The bottom end of the measuring support foot is an arc-shaped contact end face, which is used to make contact with the bearing hole end face or the bearing outer ring end face.

5. The reducer bearing selection shim mechanism according to claim 3, characterized in that: The bottom end of the support leg is a planar contact end surface, which is used to make contact with the bearing cover mounting surface or the reducer housing bearing cover mounting surface.

6. The reducer bearing pad selection mechanism according to claim 3, characterized in that: The dial indicator mounting base is fixedly connected to the dial indicator by fastening bolts, and the dial indicator mounting base is fixedly connected to the top of the fixed positioning head by bolts.

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