Design method of gasket and bearing clearance adjusting method for electric drive axle
The clearance of the electric drive axle bearing is accurately adjusted through the gasket design method, which solves the problem of imprecise bearing clearance adjustment in the prior art, and achieves the effect of uniform bearing load and vibration noise reduction.
Patent Information
- Application Number
- CN202411616664.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-13
- Publication Date
- 2025-02-28
AI Technical Summary
The prior art is difficult to accurately adjust the bearing clearance of the electric drive axle, resulting in uneven bearing load and high vibration noise.
The gasket design method is adopted to preset the clearance and number of gaskets suitable for bearing operation. According to the theoretical design of the shaft system and reducer housing, the prefabricated gasket set with a thickness gradient of ΔL is selected and adjusted through measurement and calculation.
Accurate adjustment of bearing clearance is achieved, avoiding the problem of excessive looseness or tightness of bearings, reducing vibration noise, and improving the load division uniformity of bearings.
Smart Images
Figure CN119538447A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of electric drive axle reducers, and in particular to a gasket design method and a bearing clearance adjustment method for electric drive axles. Background Art
[0002] In the existing technology of reducers for new energy vehicles, in order to ensure the load-bearing capacity of the electric drive axle and have excellent NVH performance, the gears of the multi-stage transmission system usually use helical gear transmission, and the support bearings on both sides of the shaft system usually use tapered roller bearings that can withstand large axial forces. The axial clearance of the tapered roller bearing has a direct impact on the bearing life. The appropriate bearing clearance can make the bearing load evenly distributed and reduce vibration and noise.
[0003] In the existing bearing clearance adjustment technology, the adjustment nut is usually used for adjustment. However, since the electric drive axle structure is relatively complex, it is difficult for workers to assemble it, and it is also difficult to accurately control the tightening torque of the adjustment nut, so it is not suitable to use the adjustment nut to adjust the bearing clearance of the electric drive axle. Summary of the invention
[0004] In view of this, the purpose of the present application is to provide a gasket design method and a bearing clearance adjustment method for an electric drive axle, so as to solve the problem of how to adjust the bearing clearance of the electric drive axle.
[0005] According to a first aspect of the present invention, a method for designing a gasket is provided, wherein the method for designing a gasket comprises: presetting a clearance suitable for bearing operation; ; The number of gaskets n used for adjusting the clearance is preset; according to the theoretical design of the shaft system and the reducer housing, the theoretical size of the shaft system is determined to be A, and the tolerance range is b to a; a set of gaskets with a thickness gradient of ΔL is prefabricated, in which the thickness of the starting gasket is (Ab) / n, and the thickness of the ending gasket is (A+a) / n.
[0006] Preferably, the distance between the inner bearing end face of the shaft system and the outer bearing end face of the shaft system is L1, the distance between the outer bearing end face of the shaft system and the end cover mounting surface of the shaft system is L2, the distance between the inner bearing end face of the shaft system and the end cover mounting surface of the shaft system is L3, and the theoretical dimension A of the shaft system is L1+L2-L3.
[0007] Preferably, in the gasket set, the total number of types of gaskets is (a+b) / (n×ΔL).
[0008] Preferably, the value of the number n of gaskets is selected according to the actual dimensions of the shaft system and the reducer housing, and the machining accuracy of the gaskets.
[0009] Preferably, the gasket set includes a plurality of gaskets of the same specification.
[0010] Preferably, the size of the thickness gradient is smaller than or equal to the size of the clearance, the thickness gradient ΔL>0 mm, and the thickness gradient ΔL<0.05 mm.
[0011] According to a second aspect of the present invention, a bearing clearance adjustment method for an electric drive axle is provided, wherein the bearing clearance adjustment method for the electric drive axle adopts a gasket designed by the gasket design method as described above, the electric drive axle comprises a reducer housing, a gear shaft, an outer bearing and an end cover, the outer bearing is installed between the gear and the reducer housing, the end cover is arranged at the end of the gear shaft, the end cover is installed on the reducer housing, and the gasket is installed between the reducer housing and the end cover, and the bearing clearance adjustment method for the electric drive axle comprises: measuring the distance between the outer bearing and the end face of the reducer housing as a first distance; measuring the distance between the mounting surface of the end cover and the supporting surface of the outer bearing as a second distance; calculating the adjustment distance of the gasket as the difference between the second distance and the first distance; selecting n gaskets from the gasket set so that the sum of the thicknesses of the n gaskets is closest to the value of the adjustment distance; and installing the selected n gaskets on the electric drive axle.
[0012] Preferably, the electric drive axle further includes an inner bearing and a gear, the inner bearing and the outer bearing are respectively arranged at both ends of the gear shaft, the gear shaft is mounted on the reducer housing through the inner bearing and the outer bearing, and the gear is mounted on the gear shaft.
[0013] Preferably, before measuring the distance between the outer bearing and the end face of the reducer housing to be the first distance, the inner bearing, the gear, the gear shaft and the outer bearing are installed in the reducer housing, and the outer bearing is pressed.
[0014] Preferably, the selected n gaskets include gaskets with the same specifications.
[0015] The design method of the gasket and the bearing clearance adjustment method for the electric drive axle of the embodiment of the present invention first preset the clearance suitable for the operation of the bearing And the number of shims n used to adjust the clearance, and then according to the theoretical design of the shaft system and the reducer housing, determine the theoretical size A of the shaft system and the tolerance range from b to a. Then prefabricate a set of shims with a thickness gradient of ΔL, and determine the thickness of the starting shim and the thickness of the ending shim. In this way, the smaller the thickness gradient ΔL of the shim, the more accurate the bearing clearance adjustment. The design method of the adjustment shim is simple to use and can be used for the bearing clearance adjustment of tapered rollers in a variety of scenarios. The bearing clearance adjustment method only requires two measurements, which can avoid measurement errors caused by multiple measurements. The use of adjustment shims to adjust the bearing clearance is simple for workers to operate and easy to install, and can effectively avoid the phenomenon that the tightening torque is not accurate enough when adjusting the adjustment nut, resulting in the bearing being too loose or too tight. And then it can effectively solve the problem of how to adjust the bearing clearance of the electric drive axle.
[0016] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.
[0018] Figure 1 Schematic diagram of the structure of the electric drive bridge according to the present invention.
[0019] Figure markings: 1-reducer housing; 10-cover body; 2-inner bearing; 3-gear shaft; 4-gear; 5-outer bearing; 6-gasket; 71-first distance; 72-second distance; 8-end cover; 91-third distance; 92-fourth distance; 93-fifth distance. DETAILED DESCRIPTION
[0020] The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the methods, devices and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be apparent. For example, the order of operations described herein is merely an example, and is not limited to the order set forth herein, but in addition to the operations that must occur in a particular order, changes that will be apparent after understanding the disclosure of the present application may be made. In addition, in order to improve clarity and brevity, descriptions of features known in the art may be omitted.
[0021] The features described herein may be implemented in different forms and should not be interpreted as being limited to the examples described herein. Rather, the examples described herein have been provided only to illustrate some of the many possible ways of implementing the methods, devices and / or systems described herein that will be apparent after understanding the disclosure of the present application.
[0022] Throughout the specification, when an element (such as a layer, a region, or a substrate) is described as being “on”, “connected to”, “bound to”, “over”, or “covering” another element, it may be directly “on”, “connected to”, “bound to”, “over”, or “covering” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on”, “directly connected to”, “directly bound to”, “directly over”, or “directly covering” another element, there may be no other elements present between them.
[0023] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.
[0024] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are only used to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Therefore, without departing from the teachings of the examples described herein, the first member, component, region, layer, or portion referred to may also be referred to as the second member, component, region, layer, or portion.
[0025] For ease of description, spatial relational terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element will subsequently be "below" or "lower" relative to the other element. Therefore, the term "above" includes both "above" and "below" orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relational terms used herein will be interpreted accordingly.
[0026] The terms used herein are only used to describe various examples and are not used to limit the examples. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "include", "comprising" and "having" list the existence of the stated features, quantities, operations, components, elements and / or their combinations, but do not exclude the existence or addition of one or more other features, quantities, operations, components, elements and / or their combinations.
[0027] Variations in the shapes shown in the drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include variations in shapes that occur during manufacturing.
[0028] The features of the examples described herein can be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.
[0029] like Figure 1 As shown, according to a first aspect of the present invention, a gasket design method is provided, the gasket design method comprising the following steps:
[0030] Preset clearance suitable for bearing operation ;
[0031] The number of shims n used to adjust the clearance is preset;
[0032] According to the theoretical design of the shaft system and the reducer housing 1, the theoretical size of the shaft system is determined to be A, and the tolerance range is b to a;
[0033] A set of gaskets with a prefabricated thickness gradient of ΔL is prepared, in which the thickness of the starting gasket 6 is (Ab) / n, and the thickness of the ending gasket 6 is (A+a) / n.
[0034] In the following description, reference will be made to Figure 1 The above steps of the gasket design method are described in detail.
[0035] like Figure 1 As shown, in the embodiment, the gasket 6 designed by the gasket design method can be applied to the electric drive axle. In the process of designing the gasket 6, the parameters of the gasket 6 can be determined according to the specific size of the structure in the electric drive axle.
[0036] Preferably, Figure 1 As shown, in the embodiment, the clearance suitable for the bearing operation can be preset first. The clearance The value is determined by the properties of the bearing itself, the clearance The clearance can be adjusted adaptively according to the different bearings. The actual value can be provided by the bearing manufacturer.
[0037] Preferably, Figure 1 As shown, in the embodiment, the number of shims n used for adjusting the clearance can be preset. Wherein, the number of shims n≥1. Further, preferably, in the actual design process, the value of the number of shims n can be selected according to the actual size of the shaft system and the reducer housing 1, and the processing accuracy of the shims 6. The value of the number of shims n can be adaptively adjusted according to different actual conditions, and usually the number of shims can be one or two.
[0038] Preferably, Figure 1 As shown, in the embodiment, the theoretical dimension of the shaft system can be determined as A and the tolerance range can be b to a according to the theoretical design of the shaft system and the reducer housing 1. The theoretical dimension of the shaft system and the tolerance range are determined by the actual parameters of the structure in the electric drive axle. Further, preferably, the theoretical dimension of the shaft system A = L1 + L2 - L3. Among them, the end face of the inner bearing 2 of the shaft system (which can be as follows) Figure 1 The left end face shown in the figure) and the end face of the outer bearing 5 of the shaft system (which can be as shown in the figure) Figure 1 The theoretical calculated value of the distance between the right end face shown in FIG. 1 and the right end face shown in FIG. 2 is L1 (i.e., the third distance 91). The end face of the outer bearing 5 of the shaft system (which can be Figure 1 The theoretical calculated value of the distance between the right end face of the shaft system (as shown in FIG. 1 ) and the mounting surface of the end cover 8 of the shaft system is L2 (i.e., the fourth distance 92). The end face of the inner bearing 2 of the shaft system (which can be as shown in FIG. Figure 1 The theoretical calculated value of the distance between the left end face shown in FIG. 1 and the mounting surface of the end cover 8 of the shaft system is L3 (ie, the fifth distance 93). From this, the theoretical dimension A of the shaft system can be obtained.
[0039] Preferably, Figure 1 As shown, in the embodiment, a set of shims with a thickness gradient of ΔL can be prefabricated, in which the thickness of the starting shim 6 is (Ab) / n, and the thickness of the ending shim 6 is (A+a) / n. This arrangement makes it easy to select the shim 6, and the operator can quickly find the required shim 6 in the shim set. And only one set of shims can meet the adjustment requirements of the clearance, reducing the transportation cost and storage cost, and is easy to store and manage.
[0040] More preferably, Figure 1As shown, in the embodiment, in the shim set, the total number of types of shims 6 is (a+b) / (n×ΔL). That is, when the thickness gradient ΔL of the shim 6 is constant, the larger the number of shims n used for adjusting the clearance, the smaller the total number of shims 6 in the shim set. In addition, in the shim set, the smaller the thickness gradient ΔL of the shim 6 is, the more accurate the bearing clearance adjustment is. When the total number of types of shims 6 is obtained as a non-integer, the closest integer can be selected as the actual total number of types of shims 6.
[0041] Further, preferably, Figure 1 As shown, in the embodiment, the size of the thickness gradient ΔL is less than or equal to the size of the clearance. The thickness gradient ΔL may preferably be greater than 0 mm and less than 0.05 mm. Such a configuration can ensure the adjustment accuracy of the bearing clearance while avoiding an excessive number of gaskets 6 in the gasket set, thereby saving costs and facilitating the use of operators.
[0042] Preferably, Figure 1 As shown, in the embodiment, the gasket set includes multiple gaskets 6 of the same specification. That is, in the gasket set, there can be multiple gaskets 6 of the same specification. Since in the actual selection of gaskets, it takes a long time to search when the operator selects from multiple groups of gaskets. Therefore, when the gasket set includes multiple gaskets 6 of the same specification, the operator can directly select multiple gaskets 6 of the same specification, thereby shortening the time of searching for the gasket 6.
[0043] In actual application, the design method of the gasket is relatively simple, the installation is easy, and the specifications of the prefabricated gasket 6 are relatively few, and it can be used for adjusting the clearance of tapered roller bearings in various scenarios. By using the gasket 6 to adjust the clearance of the high-speed tapered roller bearing, the working clearance of the bearing can be made more accurate, avoiding the phenomenon of the bearing being too loose or too tight.
[0044] In addition, if Figure 1 As shown, according to a second aspect of the present invention, a method for adjusting the bearing clearance of an electric drive axle is provided, wherein the method for adjusting the bearing clearance of an electric drive axle adopts a gasket 6 designed by the gasket design method described above.
[0045] Preferably, Figure 1 As shown, in an embodiment, the electric drive axle may include a reducer housing 1, a gear shaft 3, an outer bearing 5 and an end cover 8. The outer bearing 5 may be installed between the gear 4 and the reducer housing 1. The end cover 8 may be provided at the end of the gear shaft 3, and the end cover 8 may be installed on the reducer housing 1. The gasket 6 may be installed between the reducer housing 1 and the end cover 8.
[0046] Specifically, Figure 1As shown, in the embodiment, the gear shaft 3 can be along a first direction (which can be Figure 1 The first end of the gear shaft 3 (which may be as shown in the horizontal direction) is arranged inside the reducer housing 1. Figure 1 The left end as shown in the figure) can be arranged close to the interior of the reducer housing 1, and the second end of the gear shaft 3 (can be ... Figure 1 The right end shown in the figure) can be arranged close to the outside of the reducer housing 1. A gear portion protruding in the radial direction can also be formed in the middle of the gear shaft 3. Figure 1 The right end of the gear shaft 3 as shown in the figure) may be provided with a cover body 10. The second end of the gear shaft 3 is located on the inner side of the cover body 10. The outer bearing 5 may be sleeved on the second end of the gear shaft 3. The inner ring of the outer bearing 5 may fit with the second end of the gear shaft 3, and the outer ring of the outer bearing 5 may fit with the inner surface of the cover body 10. The end cover 8 may be installed on the cover body 10 by bolts. The gasket 6 may be installed between the end face of the reducer housing 1 in the first direction and the end face of the end cover 8 in the first direction.
[0047] Preferably, Figure 1 As shown, in an embodiment, the bearing clearance adjustment method for the electric drive axle includes:
[0048] The distance between the outer bearing 5 and the end surface of the reducer housing 1 is measured as a first distance 71;
[0049] The distance between the mounting surface of the end cover 8 and the supporting surface of the outer bearing 5 is measured as a second distance 72;
[0050] Calculate the adjustment distance of the gasket 6 as the difference between the second distance 72 and the first distance 71;
[0051] Selecting n gaskets 6 from the gasket set so that the sum of the thicknesses of the n gaskets 6 is closest to the value of the adjustment distance;
[0052] The selected n gaskets 6 are installed on the electric drive axle.
[0053] In the following description, reference will be made to Figure 1 The above steps of the bearing clearance adjustment method for the electric drive axle are specifically described.
[0054] Preferably, in the embodiment, the distance between the outer bearing 5 and the end face of the reducer housing 1 can be measured as a first distance 71. The end face of the reducer housing 1 can be the end face of the cover body 10 in the first direction close to the end cover 8 (i.e. Figure 1 As shown, the right end face of the reducer housing 1).
[0055] Further, in the embodiment, the distance between the mounting surface of the end cover 8 and the supporting surface of the outer bearing 5 can be measured as a second distance 72. The mounting surface of the end cover 8 can be the end surface of the end cover 8 facing the cover body 10 in the first direction.
[0056] Further, in an embodiment, the adjustment distance of the gasket 6 is calculated as the difference between the second distance 72 and the first distance 71 .
[0057] Further, in the embodiment, n (i.e., in the above-mentioned gasket design method, the number of gaskets used for adjusting the clearance is preset n) gaskets 6 are selected from the gasket set, so that the sum of the thicknesses of the n gaskets 6 is closest to the value of the adjustment distance. That is, when n gaskets 6 of different specifications are selected, the sum of the thicknesses of the n gaskets 6 can be multiple, and the operator needs to select the gasket 6 combination that is closest to the value of the adjustment distance from the multiple sums of thicknesses.
[0058] Furthermore, in the embodiment, the selected n gaskets 6 can be finally installed on the electric drive axle, that is, the n gaskets 6 are installed between the end surface of the reducer housing 1 in the first direction and the end surface of the end cover 8 in the first direction, and the gaskets 6 can be sleeved on the end cover 8.
[0059] In addition, preferably, the electric drive axle may further include an inner bearing 2 and a gear 4. The inner bearing 2 may be sleeved on the first end of the gear shaft 3. The inner ring of the inner bearing 2 may fit with the first end of the gear shaft 3, and the outer ring of the inner bearing 2 may fit with the inner surface of the reducer housing 1. The inner bearing 2 and the outer bearing 5 are respectively arranged at both ends of the gear shaft 3. The gear shaft 3 is rotatably mounted on the reducer housing 1 through the inner bearing 2 and the outer bearing 5. The gear 4 may be sleeved between the gear portion of the gear shaft 3 and the inner bearing 2.
[0060] Further, preferably, in the embodiment, before measuring the distance between the outer bearing 5 and the end face of the reducer housing 1 to be the first distance 71, the operator can first install the inner bearing 2, the gear 4, the gear shaft 3 and the outer bearing 5 on the reducer housing 1, and use a certain external force to press the outer bearing 5 to ensure that the values of the first distance 71 and the second distance 72 can be kept accurate during the subsequent measurement process. In addition, while pressing the outer bearing 5, the operator can rotate the gear shaft 3 to determine whether the bearing clearance is appropriate.
[0061] Furthermore, preferably, in the embodiment, the selected n gaskets 6 may include gaskets 6 of the same specifications, so as to shorten the time for searching and selecting the gaskets 6 and facilitate the operation for the operator.
[0062] Specifically, as shown in the embodiment, step 1: according to the parameters provided by the bearing manufacturer, determine that the clearance suitable for the bearing operation is 0.02 mm;
[0063] Step 2: Considering the theoretical dimensions of the shaft system and the machining accuracy of the gasket 6, the number of gaskets used for adjusting the clearance is preset to 2;
[0064] Step 3: According to the theoretical design of the shaft system and the supporting shell, the theoretical size of the shaft system is determined to be 4 mm, and the tolerance range is (-0.3 to 0.5) mm;
[0065] Step 4: Prefabricate a set of gaskets with a thickness gradient of 0.02mm. The thickness of the starting gasket 6 in the gasket set is 1.85mm, and the thickness of the ending gasket 6 in the gasket set is 2.25mm. Since the thickness gradient of gasket 6 is 0.02mm. In order to facilitate the matching and selection of gasket 6, the starting thickness of gasket 6 can be set to 1.84mm and the ending thickness to 2.26mm. The total number of gasket 6 types is 20, and the gasket set is {1.84mm, 1.86mm, 1.88mm...2.24mm, 2.26mm};
[0066] Step 5: After the gear 4, gear shaft 3, inner bearing 2 and outer bearing 5 are installed in the reducer housing 1, the outer bearing 5 is pressed with a pressing force of 4kN, and the gear shaft 3 is rotated until the bearing clearance is judged to be appropriate;
[0067] Step 6: The distance between the outer bearing 5 and the end surface of the reducer housing 1 is measured to be 149.94 mm, the distance between the mounting surface of the end cover 8 and the supporting surface of the outer bearing 5 is measured to be 154.02 mm, and the adjustment distance of the gasket 6 is 4.08 mm. Two gaskets 6 with a thickness of 2.04 mm are selected from the prefabricated adjustment gasket 6 group;
[0068] Step 7: Install the two selected gaskets 6 with a thickness of 2.04 mm on the electric drive axle.
[0069] During use, the bearing clearance adjustment method for the electric drive axle only requires two measurements, thereby avoiding measurement errors caused by multiple measurements. Using the gasket 6 to adjust the clearance of the high-speed tapered roller bearing can make the working clearance of the bearing more accurate and avoid the bearing from being too loose or too tight.
[0070] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed in the present application, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims
1. A gasket design method, characterized in that: The design method of the gasket includes: Preset clearance suitable for bearing operation The number of shims n used to adjust the clearance is preset; According to the theoretical design of the shaft system and reducer housing, the theoretical size of the shaft system is determined to be A, and the tolerance range is b to a; A set of gaskets with a prefabricated thickness gradient of ΔL is provided, wherein the thickness of the starting gasket is (Ab) / n and the thickness of the ending gasket is (A+a) / n.
2. The gasket design method according to claim 1, characterized in that: The distance between the inner bearing end face of the shaft system and the outer bearing end face of the shaft system is L1, the distance between the outer bearing end face of the shaft system and the end cover mounting surface of the shaft system is L2, the distance between the inner bearing end face of the shaft system and the end cover mounting surface of the shaft system is L3, and the theoretical size of the shaft system A=L1+L2-L3.
3. The gasket design method according to claim 1, characterized in that: In the gasket set, the total number of gasket types is (a+b) / (n×ΔL).
4. The gasket design method according to claim 1, characterized in that: The value of the number n of gaskets is selected according to the actual dimensions of the shaft system and the reducer housing, as well as the processing accuracy of the gaskets.
5. The gasket design method according to claim 1, characterized in that: The gasket set includes a plurality of gaskets of the same specification.
6. The gasket design method according to claim 1, characterized in that: The size of the thickness gradient is less than or equal to the size of the clearance, the thickness gradient ΔL is greater than 0 mm, and the thickness gradient ΔL is less than 0.05 mm.
7. A method for adjusting the bearing clearance of an electric drive bridge, characterized in that: A gasket designed by the gasket design method according to any one of claims 1 to 6, an electric drive axle includes a reducer housing, a gear shaft, an outer bearing and an end cover, the outer bearing is installed between the gear and the reducer housing, the end cover is arranged at the end of the gear shaft, the end cover is installed in the reducer housing, the gasket is installed between the reducer housing and the end cover, and the bearing clearance adjustment method for the electric drive axle includes: Measuring the distance between the outer bearing and the end surface of the reducer housing as a first distance; Measuring the distance between the mounting surface of the end cover and the supporting surface of the outer bearing as a second distance; calculating the adjustment distance of the gasket as the difference between the second distance and the first distance; Select n gaskets from the gasket set so that the sum of the thicknesses of the n gaskets is closest to the value of the adjustment distance; The selected n gaskets are installed on the electric drive axle.
8. The method for adjusting the bearing clearance of an electric drive axle according to claim 7, characterized in that: The electric drive axle also includes an inner bearing and a gear. The inner bearing and the outer bearing are respectively arranged at two ends of the gear shaft. The gear shaft is installed on the reducer housing through the inner bearing and the outer bearing, and the gear is installed on the gear shaft.
9. The method for adjusting the bearing clearance of an electric drive axle according to claim 8, characterized in that: Before measuring the distance between the outer bearing and the end surface of the reducer housing to be a first distance, the inner bearing, the gear, the gear shaft and the outer bearing are installed in the reducer housing, and the outer bearing is pressed.
10. The method for adjusting the bearing clearance of an electric drive axle according to claim 7, characterized in that: The selected n gaskets include gaskets with the same specifications.