Installation and Adjustment Method and Apparatus for the Intermediate Shaft Bearing of an Electric Drive Reducer

Abstract

The present invention relates to a method and apparatus for installing and adjusting an intermediate shaft bearing of an electric drive reducer, including: comparing and measuring the thickness values of a pair of standard blocks with the thickness values of a pair of tapered roller bearings to determine the thickness difference between the two; cryopreserving the separated outer rings of the tapered roller bearings; simulating the assembly of a pair of standard blocks on the reducer housing, measuring the depth value between the bearing hole on the right end face of the reducer housing and the standard block, measuring the height value of the mating installation part between the bearing right end cover and the bearing hole on the right end face of the reducer housing, and determining the adjustment parameters of the bearing clearance according to the thickness difference, depth value, height value and a preset standard value of the bearing clearance, so as to determine the selected thickness of the gasket; assembling, and using cryogenic assembly for the outer ring of the bearing. The technical solution of the present application effectively solves the problems of difficult installation and measurement of tapered roller bearings under the structure of an integral reducer housing, and has the beneficial effect of ensuring that the bearing clearance after installation meets the design standard.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and particularly to a method and an apparatus for installing and adjusting an intermediate shaft bearing of an electric drive reducer. Background Art

[0002] Currently, there are two types of selections for the intermediate shaft bearing of the electric drive axle reducer assembly. One is a deep groove ball bearing, and the other is a tapered roller bearing. When a tapered roller bearing is selected, the structure of the reducer housing is divided into a split type and an integral type. When the integral reducer housing structure is selected, the large end of the tapered opening of the outer ring of the tapered roller bearing must be inserted from both ends of the bearing hole of the reducer housing with the large end facing forward. Since the outer ring of the tapered roller bearing is in interference fit with the reducer housing, the axial clearance cannot be adjusted after the bearing is assembled; when the tapered roller bearing is being installed, there is a lack of space and position for the support of the reducer housing, resulting in problems such as difficult assembly and poor reliability; at the same time, the inner ring of the intermediate shaft bearing and other components such as gears must be installed in the reducer housing before the outer ring of the bearing is assembled, and cannot be removed after being installed. Therefore, it is necessary to measure the mating dimensions of the assembled components before assembly and determine the thickness of the adjustment shims. Summary of the Invention

[0003] In view of the above-mentioned disadvantages of the prior art, the purpose of the present invention is to provide a method and an apparatus for installing and adjusting an intermediate shaft bearing of an electric drive reducer, which are used to solve the problems of difficult assembly and difficulty in measuring and determining the bearing clearance adjustment parameters when assembling a tapered roller bearing under the existing integral reducer housing structure.

[0004] To achieve the above purpose and other related purposes, the present invention provides a method for installing and adjusting an intermediate shaft bearing of an electric drive reducer, including:

[0005] Comparatively measure the thickness values of a pair of standard blocks and the thickness values of a pair of the tapered roller bearings to determine the thickness difference between the two;

[0006] Freeze and store, separate the inner ring and the outer ring of the tapered roller bearing, and freeze and store the outer ring;

[0007] Depth measurement, install the intermediate shaft and a pair of the standard blocks on the reducer housing, install a bearing end cover on one side of the reducer housing, and measure the depth value between the end face on the side of the reducer housing where the bearing end cover is not installed and the standard block;

[0008] Height measurement, measure the height value of the other bearing end cover;

[0009] Based on the thickness difference, the depth value, the height value, and a preset bearing clearance standard value, determine the bearing clearance adjustment parameters of the tapered roller bearing;

[0010] Assemble, press-fit the inner ring of the tapered roller bearing, and fit the frozen outer ring of the tapered roller bearing into the bearing hole of the reducer housing.

[0011] In an exemplary embodiment of the present invention, compare and measure the thickness values of a pair of standard blocks and the thickness values of a pair of the tapered roller bearings, and determine the thickness difference between the two, including:

[0012] By installing a pair of the standard blocks in the base of the comparison measurement platform;

[0013] Install the upper pressing block on the standard block;

[0014] Use the comparison measuring instrument provided on the comparison measurement platform to contact the highest point of the upper pressing block, and read the standard quantity parameter;

[0015] By installing a pair of the tapered roller bearings pre-installed in the bearing holes at both ends of the reducer housing in the base of the comparison measurement platform;

[0016] Install the upper pressing block on the tapered roller bearing;

[0017] Use the comparison measuring instrument provided on the comparison measurement platform to contact the highest point of the upper pressing block, and read the measured parameter;

[0018] According to the measured parameter and the standard quantity parameter, determine the thickness difference between a pair of the tapered roller bearings and a pair of the standard blocks.

[0019] In an exemplary embodiment of the present invention, for cryopreservation, separate the inner ring and the outer ring of the tapered roller bearing, and during cryopreserving the outer ring, further include:

[0020] Separate the inner ring and the outer ring of the tapered roller bearing, and make the same marks on the separated inner ring and outer ring of the same tapered roller bearing;

[0021] Cryopreserve the outer ring.

[0022] In an exemplary embodiment of the present invention, for depth measurement, install the intermediate shaft and the standard block on the reducer housing, install a bearing end cover on one side of the reducer housing, and measure the depth value of the side of the reducer housing where the bearing end cover is not installed, including:

[0023] Install a pair of the standard blocks at both ends of the reducer housing for press-fitting the intermediate shaft respectively;

[0024] Install the left bearing end cover on the reducer housing;

[0025] Measure the depth value between the end face on one side of the reducer housing where the bearing right end cover is not installed and the standard block installed near the side where the bearing right end cover is not installed;

[0026] Remove the standard block installed on the reducer housing.

[0027] In an exemplary embodiment of the present invention, for height measurement, measuring the height value of the other bearing end cover includes:

[0028] Measure the height value of the mating installation part between the bearing right end cover and the reducer housing.

[0029] In an exemplary embodiment of the present invention, based on the thickness difference, the depth value, the height value, and a preset bearing clearance standard value, determining the clearance adjustment parameter of the tapered roller bearing includes:

[0030] Subtract the standard quantity parameter from the measured parameter to obtain the thickness difference;

[0031] Subtract the height value from the depth value, then subtract the thickness difference, and then add the preset bearing clearance standard value to obtain the clearance adjustment parameter of the tapered roller bearing.

[0032] In an exemplary embodiment of the present invention, after subtracting the height value from the depth value, then subtracting the thickness difference, and then adding the preset bearing clearance standard value to obtain the clearance adjustment parameter of the tapered roller bearing, it further includes:

[0033] Press-fit the inner ring of the tapered roller bearing into the reducer housing;

[0034] Take out the outer ring of the tapered roller bearing cooled to the preset temperature, and perform the original pair matching assembly of the outer ring and the inner ring of the tapered roller bearing with the same mark.

[0035] In an exemplary embodiment of the present invention, after taking out the outer ring of the tapered roller bearing cooled to the preset temperature and performing the original pair matching assembly of the outer ring and the inner ring of the tapered roller bearing with the same mark, it further includes:

[0036] Install the bearing left end cover on the reducer housing, and determine the thickness of the gasket to be selected according to the clearance adjustment parameter of the tapered roller bearing;

[0037] Install the gasket between the tapered roller bearing and the bearing right end cover to complete the clearance adjustment of the tapered roller bearing.

[0038] An installation and adjustment tool for the intermediate shaft bearing of an electric drive reducer includes:

[0039] A comparison measurement platform, including a base, an upper pressing block and a comparison measuring instrument arranged on the comparison measurement platform. The base is used for installing the standard block or the tapered roller bearing. The upper pressing block is used for installing on the standard block or the tapered roller bearing. The comparison measuring instrument is used for comparing and measuring the thickness difference between a pair of the tapered roller bearings and a pair of the standard blocks;

[0040] A depth measuring tool, used for measuring the depth value between the right end face of the bearing hole of the reducer housing and the standard block installed on one side close to the right end face of the bearing hole of the reducer housing.

[0041] Optionally, the comparison measuring instrument is a dial indicator, and the depth measuring tool is a depth vernier caliper.

[0042] As described above, the present invention has the following beneficial effects: By comparing and measuring a pair of standard blocks and a pair of tapered roller bearings, the thickness difference between a pair of tapered roller bearings and a pair of standard blocks is obtained. By simulating the assembly of the intermediate shaft and the standard block on the reducer housing, the depth value parameter of installing the standard block is measured. Then, by measuring the assembly height value parameter of the mating installation part of the bearing right end cover and the reducer housing. The thickness difference, depth value parameter and the assembly height value parameter of the right end cover measured in the above way, combined with the preset standard value parameter of the bearing clearance, can determine the clearance adjustment parameter of the tapered roller bearing, that is, the selected thickness value parameter of the gasket, so as to ensure that the bearing clearance after installation meets the design standard, and can effectively improve the use reliability and service life of the bearing; After freezing the outer ring of the tapered roller bearing, and then performing cryogenic assembly, the installation of the outer ring of the bearing does not require external force from the operator, and the outer ring of the bearing can be easily installed into the bearing hole of the reducer housing, effectively avoiding the beneficial effects of easy scratching and damage of the bearing hole of the reducer housing during the process of external force driving. Description of the Drawings

[0043] Figure 1 Shown as a schematic diagram of the comparison measurement structure of a pair of standard blocks and a pair of tapered roller bearings;

[0044] Figure 2 Shown as a schematic diagram of the structure of the reducer housing press-fitting the intermediate shaft;

[0045] Figure 3 Shown as a schematic diagram of the standard block simulating the assembly of the tapered roller bearing;

[0046] Figure 4 Shown as a schematic diagram of the structure of the bearing right end cover;

[0047] Figure 5 Shown as a schematic diagram of the structure of the reducer housing press-fitting the intermediate shaft and the inner ring of the tapered roller bearing;

[0048] Figure 6 Shown is a schematic structural view of assembling an intermediate shaft and a tapered roller bearing on an integral reducer housing.

[0049] Part number description

[0050] Reducer housing 1, intermediate shaft 2, tapered roller bearing 3, inner ring 301, outer ring 302, standard block 4, left end cover of bearing 5, right end cover of bearing 6, comparison measurement platform 7, base 701, upper pressing block 702, comparison measuring instrument 703, gasket 8. Specific implementation manners

[0051] The following uses specific examples to illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0052] Please refer to Figures 1 to 6 . It should be noted that the diagrams provided in this embodiment only illustrate the basic concept of the present invention in a schematic manner. Therefore, only the components related to the present invention are shown in the diagrams, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and proportion of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex. The structures, proportions, sizes, etc. shown in the diagrams of this specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the limiting conditions under which the present invention can be implemented. Therefore, they do not have technical essence. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of clear narration and are not used to limit the scope under which the present invention can be implemented. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope under which the present invention can be implemented.

[0053] Before describing the embodiments of the present invention in detail, the application environment of the present invention is first described. The technology of the present invention is mainly applied to the field of vehicle technology. The present invention solves the problems that there are difficulties in assembling a tapered roller bearing under the structure of the existing integral reducer housing and it is not easy to measure and determine the bearing clearance adjustment parameters.

[0054] Please refer to Figures 1 to 6 As shown, the present invention provides a method for installing and adjusting an intermediate shaft bearing of an electric drive reducer, including:

[0055] In an exemplary embodiment of the present application, the method for installing and adjusting the bearings of the intermediate shaft 2 of the electric drive reducer at least includes steps S110 to S160, which are introduced in detail as follows:

[0056] Step S110: Compare and measure the thickness values of a pair of standard blocks 4 and the thickness values of a pair of tapered roller bearings 3 to determine the thickness difference between the two.

[0057] Exemplarily, by stacking a pair of standard blocks 4 or a pair of tapered roller bearings 3 in the base 701 of the comparison measurement platform 7, a base 701 gasket is provided in the base 701. The base 701 gasket is in direct contact with the comparison measurement platform 7, and the standard block 4 or the tapered roller bearing 3 is in contact with the base 701 gasket. Then, the upper pressing block 702 is installed on the standard block 4 or the tapered roller bearing 3 to avoid measurement deviation of the thickness of the standard block 4 or the tapered roller bearing 3. After the upper pressing block 702 is installed, through the comparison measurement instrument 703 provided on the comparison measurement platform 7, that is, a dial indicator, the measurement end of the dial indicator is in contact with the highest point of the upper pressing block 702 installed on the standard block 4 or the tapered roller bearing 3 for measurement. When measuring the standard block 4, the standard quantity parameter is read, and when measuring the tapered roller bearing 3, the measured parameter is read. The measured parameter is compared with the standard quantity parameter to determine the thickness difference (δ) between a pair of tapered roller bearings 3 and a pair of standard blocks 4. The thickness difference (δ) = measured parameter - standard quantity parameter.

[0058] Step 120: Freeze and store. Separate the inner ring 301 and the outer ring 302 of the tapered roller bearing 3, and freeze and store the outer ring 302.

[0059] Exemplarily, separate the inner ring 301 and the outer ring 302 of the tapered roller bearing 3, and make the same marks for storage to ensure the original pairing of the inner ring 301 and the outer ring 302 of the tapered roller bearing 3 during assembly. Among them, the outer ring 302 is frozen and stored, and the temperature is set according to the needs of assembly verification. Generally, the outer ring 302 of the tapered roller bearing 3 is frozen to -80 °C. After freezing, the outer diameter of the bearing outer ring 302 becomes smaller, and it can be easily and smoothly installed into the bearing hole of the housing, with strong operability. If not frozen, the outer diameter of the outer ring 302 is larger than the bearing hole diameter, and external force must be used to force it (drive it in), and the assembly operability is poor. The housing will be deformed by the external force, the accuracy will be damaged, the bearing hole is easily scratched and damaged, and the outer ring 302 of the bearing is not properly assembled, etc. The embodiment of the present application effectively solves the problem that the outer ring 302 of the bearing is easily scratched and damaged during the process of being installed into the bearing hole of the reducer housing 1 by adopting the method of freezing and assembling the outer ring 302 of the bearing.

[0060] Step S130, depth measurement: Install the intermediate shaft 2 and the standard block 4 on the reducer housing 1. Install a bearing end cover on one side of the reducer housing 1, and measure the depth value (D) between the end face on the side of the reducer housing 1 where the bearing end cover is not installed and the standard block 4.

[0061] Exemplarily, press-fit the intermediate shaft 2 into the reducer housing 1, install a pair of standard blocks 4 in the bearing holes at both ends of the reducer housing 1 respectively, install the left bearing end cover 5 on the reducer housing 1, and measure the depth value (D) between the right end face of the bearing hole of the reducer housing 1 and the standard block 4 installed near the right end face of the bearing hole of the reducer housing 1 with a depth vernier caliper.

[0062] Step S140, height measurement: Measure the height value (H) of the other bearing end cover.

[0063] Exemplarily, use a depth measurement tool, i.e., a depth vernier caliper, to measure the height value (H) of the part of the right bearing end cover 6 for fitting with the bearing hole of the reducer housing 1.

[0064] Step S150, determine the clearance adjustment parameter of the tapered roller bearing 3 based on the thickness difference (δ), depth value (D), height value (H), and the preset bearing clearance standard value.

[0065] Exemplarily, substitute the thickness difference (δ), depth value (D), height value (H), and the preset bearing clearance standard value measured by the above method into the formula for the required thickness of the spacer 8, i.e., the selected thickness value (B) of the spacer 8 = depth value (D) - height value (H) - thickness difference (δ) + bearing clearance standard value, so as to calculate and determine the selected thickness value (B) of the spacer 8, thereby adjusting the axial clearance of the tapered roller bearing 3 to make the clearance of the installed tapered roller bearing 3 meet the design standard, so as to meet the service reliability of the bearing and improve the service life of the bearing.

[0066] Step S160, assembling: Press-fit the inner ring 301 of the tapered roller bearing 3, and install the frozen outer ring 302 of the tapered roller bearing 3 into the bearing hole of the reducer housing 1 for assembly.

[0067] Exemplarily, install the outer ring 302 of the bearing frozen to the preset temperature with the large end facing inward into the bearing hole of the reducer housing 1. After installing the left bearing end cover 5 first, then install the spacer 8 with the selected thickness value obtained by calculation between the right bearing end cover 6 and the tapered roller bearing 3, thereby completing the installation of the bearing of the intermediate shaft 2 of the electric drive reducer of the present application.

[0068] In this embodiment, by comparing and measuring a pair of standard blocks 4 and a pair of tapered roller bearings 3, the thickness difference (δ) between the pair of tapered roller bearings 3 and the pair of standard blocks 4 is obtained, and by simulating the assembly of the intermediate shaft 2 and the standard block 4 on the reducer housing 1, the depth value parameter of the installation standard block 4 is measured, and then the assembly height value parameter of the matching installation part of the right end cover 6 of the bearing and the reducer housing 1 is measured. The thickness difference, depth value parameter and assembly height value parameter of the right end cover measured in the above manner are combined with the preset bearing clearance standard value. Parameters can be used to determine the clearance adjustment parameters of the tapered roller bearing 3, that is, the selected thickness value parameters of the gasket 8, so as to ensure that the bearing clearance after installation meets the design standard, which can effectively improve the reliability and service life of the bearing; by freezing the outer ring 302 of the tapered roller bearing 3 and then assembling it, the frozen assembly makes it possible to install the bearing outer ring 302 without the need for external force from the operating personnel, and the bearing outer ring 302 can be easily installed in the bearing hole of the reducer housing 1, which effectively avoids the beneficial effect that the bearing hole of the reducer housing 1 is easily strained or damaged during the external force injection process.

[0069] In an exemplary embodiment of the present application, the thickness values ​​of a pair of standard blocks 4 and the thickness values ​​of a pair of tapered roller bearings 3 are measured by comparison to determine the thickness difference between the two, which at least includes steps S210 to S270.

[0070] Step S210 , a pair of standard blocks 4 are installed in the base 701 of the comparison measurement platform 7 .

[0071] Step S220 , installing the upper pressing block 702 on the standard block 4 .

[0072] Exemplarily, measurement deviation is effectively avoided and the accuracy of measurement results is improved.

[0073] Step S230: The comparison measuring device 703 disposed on the comparison measuring platform 7 is brought into contact with the highest point of the upper pressing block 702 to read the standard quantity parameters.

[0074] Step S240 , installing a pair of tapered roller bearings 3 pre-installed in the bearing holes at both ends of the reducer housing 1 into the base 701 of the comparison measurement platform 7 .

[0075] Step S250 , installing the upper pressing block 702 on the tapered roller bearing 3 .

[0076] Exemplarily, the thickness measurement of the tapered roller bearing 3 is ensured to be the same as the thickness measurement standard of the standard block 4, so as to further ensure the accuracy of the measurement.

[0077] Step S260: Use the comparison measuring device 703 disposed on the comparison measuring platform 7 to contact the highest point of the upper pressing block 702 to read the measured parameter.

[0078] Exemplarily, the thickness difference between a pair of standard blocks 4 and a pair of tapered roller bearings 3 is determined by subtracting the standard quantity parameter from the measured parameter read by the comparison measuring instrument 703.

[0079] Step S270: Determine the thickness difference between a pair of the tapered roller bearings and a pair of the standard blocks according to the measured parameter and the standard quantity parameter.

[0080] Exemplarily, the thickness difference (δ) = measured parameter - standard quantity parameter.

[0081] In this embodiment, through the comparison measuring platform 7 and the comparison measuring instrument 703, the standard quantity parameter when the comparison measuring instrument 703 calibrates a pair of standard blocks 4 is read, and the measured parameter read when comparing a pair of tapered roller bearings 3 is obtained. The thickness difference between a pair of standard blocks 4 and a pair of tapered roller bearings 3 is determined according to the standard quantity parameter and the measured parameter.

[0082] In an exemplary embodiment of the present application, for cryopreservation, the inner ring 301 and the outer ring 302 of the tapered roller bearing 3 are separated, and during the cryopreservation of the outer ring 302, at least steps S310 to S320 are included.

[0083] Step S310: Separate the inner ring 301 and the outer ring 302 of the tapered roller bearing 3, and make the same marks on the separated inner ring 301 and outer ring 302 of the same tapered roller bearing 3.

[0084] Exemplarily, the same marks are made on the separated bearing inner ring 301 and bearing outer ring 302 of the same tapered roller bearing 3. When the separated inner ring 301 and outer ring 302 of the tapered roller bearing 3 are respectively installed into the reducer housing 1, the original assembly pair is ensured.

[0085] Step S320: Perform cryopreservation on the outer ring 302.

[0086] Exemplarily, cryopreservation is performed on the separated bearing outer ring 302 of the tapered roller bearing 3. After cryopreservation, the outer diameter of the bearing outer ring 302 becomes smaller, and it can be more easily and smoothly installed into the bearing hole of the reducer housing 1, and the operability of cryogenic assembly is relatively strong.

[0087] In this embodiment, by separating and marking, the original assembly pair is ensured when the inner ring 301 and the outer ring 302 of the tapered roller bearing 3 are assembled. By performing cryopreservation on the outer ring 302, the installation is made more relaxed and convenient, effectively avoiding the problems that when the unfrozen bearing outer ring 302 is forced into the reducer housing 1, it is easy to cause the bearing hole of the reducer housing 1 to be scratched and damaged and the bearing outer ring 302 to be misassembled.

[0088] In an exemplary embodiment of the present application, for depth measurement, the reducer housing 1 mounts the intermediate shaft 2 and the standard block 4, and a bearing end cover is mounted on one side of the reducer housing 1. The depth value of the side of the reducer housing 1 where the bearing end cover is not mounted is measured, and it at least includes steps S410 to S440.

[0089] Step S410: Mount a pair of standard blocks 4 at both ends of the reducer housing 1 where the intermediate shaft 2 is press-fitted.

[0090] Exemplarily, the standard block 4 is used to replace the tapered roller bearing 3 for simulated assembly.

[0091] Step S420: Mount the left bearing end cover 5 on the reducer housing 1.

[0092] Step S430: Measure the depth value between the end face of the side of the reducer housing 1 where the right bearing end cover 6 is not mounted and the standard block 4 mounted on the side close to where the right bearing end cover 6 is not mounted.

[0093] Exemplarily, use a depth measurement tool, i.e., a depth vernier caliper, to measure the depth value between the right end face of the bearing hole of the reducer housing 1 and the nearest standard block 4.

[0094] Step S440: Dismount the standard block 4 mounted on the reducer housing 1.

[0095] Exemplarily, after the simulated assembly measurement is completed, dismount the standard block 4.

[0096] In this embodiment, the simulated assembly is mainly to measure the depth value between the standard block 4 and the end face of the right bearing hole of the reducer housing 1 when the standard block 4 is installed in the reducer housing 1.

[0097] In an exemplary embodiment of the present application, for height measurement, to measure the height value of the other bearing end cover, it at least includes step S510.

[0098] Step S510: Measure the height value of the part where the right bearing end cover 6 is fitted and mounted with the reducer housing 1.

[0099] Exemplarily, use a depth measurement tool, i.e., a depth vernier caliper, to measure the height value of the part of the right bearing end cover 6 for fitting and mounting with the bearing hole of the reducer housing 1.

[0100] In this embodiment, according to the thickness difference between a pair of standard blocks 4 and a pair of tapered roller bearings 3 obtained from the previous steps, the depth value between the standard block 4 and the end face of the right bearing hole of the reducer housing 1 when the standard block 4 is installed in the reducer housing 1, the height value of the part of the right bearing end cover 6 for fitting and mounting with the bearing hole of the reducer housing 1, and the preset standard value of the bearing clearance, determine the adjustment parameter of the bearing clearance, so as to determine the selected thickness of the gasket 8.

[0101] In an exemplary embodiment of the present application, based on the thickness difference, the depth value, the height value, and a preset bearing clearance standard value, the clearance adjustment parameter of the tapered roller bearing 3 is determined, which at least includes steps S610 to S620.

[0102] Step S610: Subtract the standard quantity parameter from the measured parameter to obtain the thickness difference (δ).

[0103] Exemplarily, the thickness difference (δ) = the measured parameter - the standard quantity parameter.

[0104] Step S620: Subtract the height value (H) and the thickness difference (δ) from the depth value (D), and then add the preset bearing clearance standard value to obtain the clearance adjustment parameter of the tapered roller bearing 3.

[0105] Exemplarily, the clearance adjustment parameter of the tapered roller bearing 3 = the depth value (D) - the height value (H) - the thickness difference (δ) + the preset bearing clearance standard value.

[0106] In this embodiment, the parameters obtained by measurement are substituted into the calculation formula to determine the clearance adjustment parameter of the tapered roller bearing 3, and then the selected thickness of the gasket 8 is determined, so as to achieve the purpose of adjusting the clearance of the tapered roller bearing 3 to meet the design standard.

[0107] In an exemplary embodiment of the present application, after subtracting the height value and the thickness difference from the depth value and then adding the preset bearing clearance standard value to obtain the clearance adjustment parameter of the tapered roller bearing 3, it at least further includes steps S710 to S720.

[0108] Step S710: Press-fit the inner ring 301 of the tapered roller bearing 3 into the reducer housing 1.

[0109] Exemplarily, install the inner ring 301 of the tapered roller bearing 3 in the bearing hole of the reducer housing 1, with the large end of the inner ring 301 of the tapered roller bearing 3 facing the bearing hole of the reducer housing 1, and the tapered roller bearing 3 sleeved on the intermediate shaft 2.

[0110] Step S720: Take out the outer ring 302 of the tapered roller bearing 3 cooled to the preset temperature, and perform original pair matching assembly of the outer ring 302 of the tapered roller bearing 3 with the same mark and the inner ring 301.

[0111] Exemplarily, take out the outer ring 302 of the tapered roller bearing 3 frozen to the preset temperature (-80 °C) from the freezing bin, check whether the marks of the outer ring 302 and the inner ring 301 installed on the reducer housing 1 are paired, and install the originally assembled inner ring 301 and outer ring 302 combination.

[0112] In this embodiment, the outer ring 302 of the tapered roller bearing 3 is assembled by cryogenic fitting. After cryogenic treatment, the outer diameter of the bearing outer ring 302 becomes smaller, and it can be easily and smoothly installed into the bearing hole of the reducer housing 1, with strong assembly operability. Cryogenic fitting effectively avoids the following problems. Without cryogenic treatment, the outer diameter of the outer ring 302 is larger than the bearing hole diameter of the reducer housing 1, and external force must be used to force it in or press it in, resulting in poor assembly operability. The housing will be deformed by the external force, causing damage to the accuracy, and the bearing hole is easily scratched and damaged, and the outer ring 302 of the bearing is not properly assembled, etc.

[0113] In an exemplary embodiment of the present application, the outer ring 302 of the tapered roller bearing 3 cooled to a preset temperature is taken out, and after the outer ring 302 and the inner ring 301 of the tapered roller bearing 3 with the same mark are originally paired and assembled, at least steps S810 to S820 are further included.

[0114] Step S810: Install the bearing left end cover 5 on the reducer housing 1, and determine the thickness of the gasket 8 to be selected according to the clearance adjustment parameters of the tapered roller bearing 3.

[0115] Exemplarily, after the outer ring 302 of the tapered roller bearing 3 is assembled, the bearing left end cover 5 of the bearing hole of the reducer housing 1 is assembled, and according to the calculated adjustment parameters of the tapered roller bearing 3, the gasket 8 with the determined thickness is installed into the right end bearing hole of the reducer housing 1.

[0116] Step S820: Install the gasket 8 between the tapered roller bearing 3 and the bearing right end cover 6 to complete the clearance adjustment of the tapered roller bearing 3.

[0117] Exemplarily, after the gasket 8 is assembled, the bearing right end cover 6 is assembled to complete the clearance adjustment of the tapered roller bearing 3, and at the same time, the assembly work of the integral reducer housing 1 and the tapered roller bearing 3 of the intermediate shaft 2 is completed.

[0118] In this embodiment, the present application effectively solves the problem of difficult assembly between the tapered roller bearing 3 and the integral reducer housing 1, and enables the electro-drive reducer assembly product to achieve more excellent characteristics in terms of efficiency and NVH.

[0119] The present application also provides an installation and adjustment tool for the intermediate shaft bearing of an electro-drive reducer, including:

[0120] In an exemplary embodiment of the present application, the comparison measurement platform 7 includes a base 701, an upper pressing block 702, and a comparison measuring instrument 703 disposed on the comparison measurement platform 7. The base 701 is used to mount the standard block 4 or the tapered roller bearing 3. The upper pressing block 702 is used to be mounted on the standard block 4 or the tapered roller bearing 3. The comparison measuring instrument 703 is used to comparatively measure the thickness difference between a pair of standard blocks 4 and a pair of tapered roller bearings 3. A depth measuring tool is used to measure the depth value between the right end face of the bearing hole of the reducer housing 1 and the standard block 4 mounted on one side close to the right end face of the bearing hole of the reducer housing 1.

[0121] In this embodiment, the comparison measurement work of a pair of standard blocks 4 and a pair of tapered roller bearings 3 is completed through the cooperation of the base 701, the upper pressing block 702, and the comparison measuring instrument 703, effectively ensuring the measurement accuracy and avoiding measurement value deviation.

[0122] In an exemplary embodiment of the present application, the comparison measuring instrument 703 is a dial indicator, and the depth measuring tool is a depth vernier caliper.

[0123] Working principle: Place a pair of standard blocks 4 into the base 701 on the comparison measurement platform 7, install the upper pressing block 702 on the standard blocks 4, make the comparison measurement instrument 703 contact the highest point of the comparison measurement platform 7 in comparison with the upper pressing block 702, read the standard quantity parameters obtained when the comparison measurement instrument measures a pair of standard blocks 4, repeat the above steps to replace a pair of standard blocks 4 with a pair of tapered roller bearings 3, read the measured parameters obtained when the comparison measurement instrument measures a pair of tapered roller bearings 3, and then subtract the standard quantity parameters from the measured parameters, so as to compare and measure the thickness difference (δ) between a pair of tapered roller bearings 3 and a pair of standard blocks 4; Separate the inner ring 301 and the outer ring 302 of the tapered roller bearing 3, make the same marks on the separated inner ring 301 and outer ring 302 of the same tapered roller bearing 3, and then freeze and store the outer ring 302 of the tapered roller bearing 3; Press-fit the intermediate shaft 2 into the reducer housing 1, simulate the tapered roller bearing 3 with the standard block 4 and assemble it on the reducer housing 1, assemble the bearing left end cover 5, measure the depth value (D) between the right end face of the bearing hole of the reducer housing 1 and the adjacent standard block 4 with a depth measuring tool, after the measurement is completed, disassemble the standard block 4 from the reducer housing 1, measure the height value (H) of the mating assembly part of the bearing right end cover 6 and the right end bearing hole of the reducer housing 1 with a depth measuring tool, substitute the thickness difference (δ), the depth value (D), the height value (H) and the standard value of the bearing clearance into the calculation formula: bearing clearance adjustment parameter (the selected thickness of the gasket 8) = depth value (D) - height value (H) - thickness difference (δ) + standard value of the bearing clearance, determine the selected thickness value of the gasket 8, then press-fit the bearing inner ring 301 into the bearing hole of the reducer housing 1, and the bearing inner ring 301 is sleeved on the intermediate shaft 2, check that the marks on the bearing outer ring 302 and the inner ring 301 are consistent, install the large end of the frozen bearing outer ring 302 facing inward into the bearing hole of the reducer housing 1, and the bearing outer ring 302 is originally paired and mated with the bearing inner ring 301, assemble the bearing left end cover 5, install the gasket 8 with the determined thickness into the right end bearing hole of the reducer housing 1, and assemble the bearing right end cover 6 to complete the assembly and clearance adjustment of the "integral reducer housing 1, intermediate shaft 2 and tapered roller bearing 3" of the electric drive reducer assembly. Adopting the technical solution of the present application effectively solves the problem of great difficulty in the installation and measurement of the tapered roller bearing 3 under the structure of the integral reducer housing 1, and has the beneficial effect of ensuring that the bearing clearance after installation meets the design standard, so as to meet the use reliability and life requirements of the bearing.

[0124] The above embodiments are only illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A method for installing and adjusting the intermediate shaft bearing of an electric drive reducer, including an integral reducer housing, an intermediate shaft for installing and transmitting torque within the reducer housing, and a tapered roller bearing for installing within the bearing hole of the reducer housing, characterized in that: The method includes: Comparatively measuring the thickness values of a pair of standard blocks and the thickness values of a pair of the tapered roller bearings to determine the thickness difference therebetween; cryopreserving, separating the inner ring and the outer ring of the tapered roller bearing, and cryopreserving the outer ring; Depth measurement, installing the intermediate shaft and a pair of the standard blocks on the reducer housing, installing a bearing end cover on one side of the reducer housing, and measuring the depth value between the end face on the side of the reducer housing where the bearing end cover is not installed and the standard block; Height measurement, measuring the height value of the other bearing end cover; Based on the thickness difference, the depth value, the height value, and a preset bearing clearance standard value, determining the clearance adjustment parameter of the tapered roller bearing; Assembly, press-fitting the inner ring of the tapered roller bearing, and fitting the cryopreserved outer ring of the tapered roller bearing into the bearing hole of the reducer housing for assembly; Comparatively measuring the thickness values of a pair of standard blocks and the thickness values of a pair of the tapered roller bearings to determine the thickness difference therebetween, including: Installing a pair of the standard blocks in the base of the comparative measurement platform; Installing the upper pressing block on the standard block; Using a comparative measuring instrument provided on the comparative measurement platform to contact the highest point of the upper pressing block, and reading the standard quantity parameter; Installing a pair of the tapered roller bearings pre-installed in the bearing holes at both ends of the reducer housing in the base of the comparative measurement platform; Installing the upper pressing block on the tapered roller bearing; Using a comparative measuring instrument provided on the comparative measurement platform to contact the highest point of the upper pressing block, and reading the measured parameter; According to the measured parameter and the standard quantity parameter, determining the thickness difference between a pair of the tapered roller bearings and a pair of the standard blocks; Depth measurement, installing the intermediate shaft and the standard block on the reducer housing, installing a bearing end cover on one side of the reducer housing, and measuring the depth value on the side of the reducer housing where the bearing end cover is not installed, including: Respectively installing a pair of the standard blocks at both ends of the reducer housing for press-fitting the intermediate shaft; Installing the left bearing end cover on the reducer housing; Measuring the depth value between the end face on the side of the reducer housing where the right bearing end cover is not installed and the standard block installed near the side where the right bearing end cover is not installed; Removing the standard blocks installed on the reducer housing; Based on the thickness difference, the depth value, the height value, and a preset bearing clearance standard value, determining the clearance adjustment parameter of the tapered roller bearing, including: Subtracting the standard quantity parameter from the measured parameter to obtain the thickness difference; Subtracting the height value and the thickness difference from the depth value, and then adding a preset bearing clearance standard value to obtain the clearance adjustment parameter of the tapered roller bearing.

2. The method for installing and adjusting the intermediate shaft bearing of the electric drive reducer according to claim 1, characterized in that: Cryopreserving, separating the inner ring and the outer ring of the tapered roller bearing, and cryopreserving the outer ring, further includes: Separating the inner ring and the outer ring of the tapered roller bearing, and making the same marks on the separated inner ring and outer ring of the same tapered roller bearing; Cryopreserving the outer ring.

3. The method for installing and adjusting the intermediate shaft bearing of the electric drive reducer according to claim 1, wherein: Height measurement, measuring the height value of the other bearing end cover, including: Measure the height value of the mating and installation part of the right end cover of the bearing and the reducer housing.

4. The method for installing and adjusting the intermediate shaft bearing of the electric drive reducer according to claim 1, characterized in that: Subtract the height value and the thickness difference from the depth value, and then add the preset standard value of the bearing clearance, After obtaining the clearance adjustment parameter of the tapered roller bearing, it further includes: Press-fit the inner ring of the tapered roller bearing into the reducer housing; Take out the outer ring of the tapered roller bearing cooled to the preset temperature, and perform the original pair matching assembly of the outer ring and the inner ring of the tapered roller bearing with the same mark.

5. The method for installing and adjusting the intermediate shaft bearing of the electric drive reducer according to claim 4, wherein: After taking out the outer ring of the tapered roller bearing cooled to the preset temperature and performing the original pair matching assembly of the outer ring and the inner ring of the tapered roller bearing with the same mark, it further includes: Install the left end cover of the bearing on the reducer housing, and determine the thickness of the gasket to be selected according to the clearance adjustment parameter of the tapered roller bearing; Install the gasket between the tapered roller bearing and the right end cover of the bearing to complete the clearance adjustment of the tapered roller bearing.

6. An installation and adjustment tool for the intermediate shaft bearing of an electric drive reducer, characterized in that: Applied to the installation and adjustment method of the intermediate shaft bearing of the electric drive reducer according to any one of claims 1-5, the apparatus includes: a comparison measurement platform, including a base, an upper pressing block and a comparison measurement instrument arranged on the comparison measurement platform, the base is used to install the standard block or the tapered roller bearing, the upper pressing block is used to install on the standard block or the tapered roller bearing, and the comparison measurement instrument is used to compare and measure the thickness difference between a pair of tapered roller bearings and a pair of standard blocks; A depth measurement tool for measuring the depth value between the right end face of the bearing hole of the reducer housing and the standard block installed on the side close to the right end face of the bearing hole of the reducer housing.

7. The intermediate shaft bearing installation and adjustment tool for an electric drive reducer according to claim 6, characterized in that: The comparison measurement instrument is a dial indicator, and the depth measurement tool is a depth vernier caliper.

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