A method of adjusting internal clearances in a gear box

Abstract

The application provides a gear box internal gap adjustment method, which comprises the following steps: installing a parallel box with a primary inner gear ring, measuring the gap n between the box body of the parallel box and the primary inner gear ring stop opening by using a plug gauge; measuring the thickness a of a tool ring; hoisting the parallel box, placing the tool ring on the primary planet carrier, then installing the parallel box on the primary gear ring, and again measuring the gap m between the box body of the parallel box and the primary inner gear ring stop opening by using the plug gauge; and calculating the theoretical thickness A of a support ring placed between the parallel box and the primary inner gear ring stop opening by using the thickness a of the tool ring and the gap m and n before and after placing the tool ring. The gap before and after installing the tool ring between the parallel box and the primary inner gear ring can be directly measured by using the plug gauge, the measurement is more convenient, the obtained result is more accurate, the axial gap can be quickly and simply measured, the grinding and matching times are effectively reduced, and the labor amount of the operator is obviously reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gear box bearing assembly, in particular to a gear box internal gap adjustment method. BACKGROUND

[0002] The transmission gear box refers to various gear structures that mesh with each other or are coupled with each other, is a key core component of a machine, and has a very wide application in various machines. Gear box transmission belongs to the category of precision transmission, and the determination of the entire gear box internal gap is an important index reflecting the precision of the gear box, which is affected by part machining precision, assembly means, bearing play and many other factors, and the setting of the gap affects the vibration, noise and even the service life of the entire gear box.

[0003] The traditional method is to measure the stop port size of the two parts that cooperate with each other multiple times by using a micrometer, and to calculate the axial gap. This method is limited by the structure, resulting in low precision of the obtained axial gap. SUMMARY

[0004] The present application provides a gear box internal gap adjustment method to solve the problem of low precision caused by measuring the stop port size between two parts by using a micrometer and then calculating the axial gap.

[0005] In order to achieve the above-mentioned application purposes, the present application provides the following technical solutions:

[0006] A gear box internal gap adjustment method comprises the following steps:

[0007] The parallel box and the first level inner gear ring are installed, and the stop port gap n between the box body of the parallel box and the first level inner gear ring is measured by using a plug gauge;

[0008] The thickness a of the tool ring is measured;

[0009] The parallel box is lifted, the tool ring is placed on the first level planet carrier, then the parallel box is installed on the first level gear ring, and the stop port gap m between the box body of the parallel box and the first level inner gear ring is measured again by using a plug gauge;

[0010] The theoretical thickness A of the support ring placed between the parallel box and the first level inner gear ring is calculated according to the stop port gap m, n of the box body of the parallel box and the first level inner gear ring before and after the placement of the tool ring and the thickness a of the tool ring.

[0011] Preferably, the theoretical thickness A of the support ring is a-(m-n).

[0012] Preferably, the step of installing the parallel box and the first level inner gear ring and measuring the stop port gap n between the box body of the parallel box and the first level inner gear ring by using a plug gauge comprises the following steps:

[0013] S11, then the self-aligning roller bearing is installed on the second level planet carrier,

[0014] S12, placing the tool to the horizontal plane, placing the installation cylinder to the tool, and installing the second-stage planet carrier to the installation cylinder;

[0015] S13, sequentially installing the second-stage sun gear, the second-stage inner gear ring, the middle box body, and the first-stage inner gear ring, and then hoisting the first-stage planet carrier, on which the first-stage planet wheel and the first-stage planet wheel shaft are installed, to the second-stage sun gear;

[0016] S14, hoisting the parallel box to the first-stage inner gear ring, and then measuring n.

[0017] Preferably, the step S11 requires heating the self-aligning roller bearing before being installed to the second-stage planet carrier. Preferably, the tool in the step S12 is placed vertically upward, and the installation cylinder is connected to the tool vertically.

[0018] Preferably, the axial clearance of the self-aligning roller bearing after being installed is L, the axial clearance of the gear box is P, and the actual thickness B of the support ring is a-(m-n)-P-L / 2.

[0019] Compared with the prior art, the application has the following beneficial effects: compared with measuring the stop gap size between two parts by using a micrometer, the thickness of the tool ring of the application can be measured before being placed, the gap before and after the installation of the tool ring between the parallel box and the first-stage inner gear ring can be directly measured by using a plug gauge, the measurement is more convenient and the result is more accurate, the axial clearance can be quickly and simply measured by using this method, the number of grinding and fitting is effectively reduced, the labor of the operator is obviously reduced, the application only needs to use a plug gauge and a travelling crane to obtain the result, and time and labor are saved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 Fig. 1 is a structural schematic diagram of a gear box;

[0021] Figure 2 Fig. 2 is an assembly drawing of an adjusting method provided by the application;

[0022] Figure 3 Fig. 3 is an enlarged view of the position C. Figure 2 Fig. 4 is an enlarged view of the position D.

[0023] In the figure, 1 is an end cover, 2 is a first-stage planet carrier, 3 is a first-stage inner gear ring, 4 is a middle box body, 5 is a second-stage sun gear, 6 is a second-stage inner gear ring, 7 is a second-stage planet carrier, 8 is a self-aligning roller bearing, 9 is an installation cylinder, 10 is a tool, and 11 is a parallel box. DETAILED DESCRIPTION

[0024] The application will be described in detail below with reference to the drawings.

[0025] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and not to limit the present application.

[0026] In the description of the present application, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0027] In the description of the present application, unless otherwise specified and limited, it should be noted that the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be a mechanical connection or an electrical connection, it can be a communication between two elements, it can be directly connected or indirectly connected through an intermediate medium, and those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0028] The present application provides a method for adjusting the internal gap of a gear box, comprising:

[0029] Place the tooling 10 on the horizontal ground, place the installation cylinder 9 on the tooling 10, as shown in Figure 2 Heat the self-aligning roller bearing 8 and install it on the secondary planetary carrier 7, and the bearing end face must be firmly installed. Because the self-aligning roller bearing 8 needs to be baked and installed, it cannot be installed without heating.

[0030] Lift the secondary planetary carrier 7 as a whole and drop it into the installation cylinder 9. Before the secondary planetary carrier is installed on the installation cylinder 9, the planetary gear, the planetary gear shaft and the self-aligning roller bearing 8 have been installed on the secondary planetary carrier 7.

[0031] When installing the secondary planetary carrier 7 on the installation cylinder 9, the self-aligning roller bearing 8 outer ring end face must be firmly installed on the installation cylinder 9. Due to gravity, the inner and outer rings of the self-aligning roller bearing 8 are misaligned by half the axial play. The axial play of the self-aligning roller bearing before installation is 3.814mm-5.178mm, and the axial play of the self-aligning roller bearing 8 after installation is L. In the present application, the axial play of the self-aligning roller bearing after installation is generally 2.483mm-4.25mm, and L in the present application is generally considered as the average of the axial play after installation, which is 3.6mm.

[0032] The second sun gear 5, the second inner gear ring 6, the middle box body 4, and the first inner gear ring 3 are sequentially installed, and then the first planetary carrier 2 provided with the first planetary gear and the first planetary gear shaft is hoisted to the second sun gear 5, under the action of gravity, the first planetary carrier 2 falls on the second sun gear 5, and the positions of the parts are as shown in Figure 2 .

[0033] The parallel box is hoisted and falls on the first inner gear ring 3, the parallel box body and the end face of the first inner gear ring 3 abut, the plug gauge is used to measure the gap value n between the parallel box body and the first inner gear ring 3, and at this time, the gap value n is measured without installing the tool ring between the end cover 1 and the first inner gear ring 3.

[0034] The actual thickness a of the tool ring is measured by using the micrometer, the parallel box is hoisted by using the crane, the tool ring is placed between the end cover 1 and the first planetary carrier 2, the parallel box is again fallen on the first inner gear ring 3, and the gap value m between the parallel box body and the first inner gear ring is again measured by using the plug gauge, as shown in Figure 3 .

[0035] The actual value of A = a-(m-n) is calculated by the actually measured a, m, and n, and the value of A is the theoretical thickness of the position of the supporting ring installed on the end cover 1 and the first planetary carrier 2 in the state. Figure 2 After the assembly is completed, in order to control the axial gap of the gear box in a reasonable range, the general axial gap is (2±0.5) mm, the theoretical axial gap is P, and therefore the actual thickness B of the supporting ring = a-(m-n)-P-L / 2, that is, B = a-(m-n)-2-1.8 mm. Thus, the precise measurement of the axial gap can be realized, and the operation is simple, fast, time-saving and labor-saving. 2 mm is the axial gap of the gear box in the normal working state, and 2 mm is subtracted, that is, the reserved gap is 2 mm.

[0036] The gear box is normally in the state as shown in Figure 1 , that is, the gear box is horizontally placed, so that when the gap value between the parallel box body and the first inner gear ring 3 is measured, the contact between the parts may have a gap or an interference, and the measurement result has a large error. The gear box is rotated by 90° in the application, and then the measurement is performed. Since the parts are in the falling and pressing state under the action of gravity, the error is reduced.

[0037] The parallel box structure is adopted as the input transmission part in the application, the parallel gear box and the planetary gear transmission are used to transmit the torque in cooperation with each other, and the parallel shaft transmission and the planetary transmission are included. The plug gauge, the crane, and the micrometer can be used to measure various data, and the process of measuring the data is time-saving and labor-saving. In addition, the measurement accuracy of the axial gap is improved by the tool and the trial assembly method, the axial gap can be quickly and simply measured, the number of grinding and assembling is effectively reduced, and the labor of the operator is obviously reduced.

[0038] The above merely describes preferred embodiments of the present application, and is not used to limit the present application, any modification, equivalent replacement and improvement within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method of adjusting the internal clearance of a gear box, characterized in that, The application relates to a method for measuring the thickness of a support ring between a parallel box and a primary planetary carrier. The parallel box is installed with the primary inner gear ring, the gap n between the box body of the parallel box and the primary inner gear ring is measured by using a feeler gauge; The thickness a of the tool ring is measured; The parallel box is hoisted, the tool ring is placed on the primary planetary carrier, the parallel box is installed on the primary gear ring, and the gap m between the box body of the parallel box and the primary inner gear ring is measured by using a feeler gauge again; The theoretical thickness A of the support ring placed between the parallel box and the primary planetary carrier is calculated according to the gap m and n between the box body of the parallel box and the primary inner gear ring before and after the tool ring is placed and the thickness a of the tool ring; The theoretical thickness A of the support ring is a-(m-n); The method for installing the parallel box with the primary inner gear ring and measuring the gap n between the box body of the parallel box and the primary inner gear ring by using a feeler gauge comprises the following steps: S11, then the self-aligning roller bearing is installed on the secondary planetary carrier, S12, the tool is placed on a horizontal plane, the installation cylinder is placed on the tool, and the secondary planetary carrier is installed on the installation cylinder; S13, the secondary sun gear, the secondary inner gear ring, the middle box body and the primary inner gear ring are sequentially installed, and then the primary planetary carrier provided with the primary planet wheel and the primary planet wheel shaft is hoisted on the secondary sun gear; S14, the parallel box is hoisted and fallen on the primary inner gear ring, and then n is measured. The actual thickness B of the support ring is a-(m-n)-P-L / 2, wherein L is the axial play after the self-aligning roller bearing is installed, and P is the axial gap of the gear box.

2. The method of adjusting the internal clearance of a gear case according to claim 1, wherein, The self-aligning roller bearing needs to be heated before being installed on the secondary planetary carrier in the step S11.

3. The method of adjusting the internal clearance of a gear case of claim 1, wherein, In the step S12, the tool is placed vertically upward, and the installation cylinder is vertically connected with the tool.

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