Adjusting and locking structure for bearings and gear box

Abstract

The present disclosure discloses an adjusting locking structure for a bearing and a gear box, the adjusting locking structure comprising: an abutting piece, a bearing locking piece, a fixed shaft, and a locking pin, wherein the abutting piece is arranged on one side of the fixed shaft in the axial direction, and the bearing is arranged on the outer periphery of the fixed shaft; the bearing locking piece is threadedly connected with the fixed shaft in the axial direction of the fixed shaft, and the side of the bearing locking piece away from the abutting piece abuts against the bearing; and the locking pin is fixedly connected with the bearing locking piece and the fixed shaft on one side, and abuts against the abutting piece on the other side. The adjusting locking structure of the present disclosure embodiment can improve the stability of the locking mechanism by arranging the abutting piece, the fixed shaft, the bearing locking piece arranged around the fixed shaft, and the locking pin, wherein the bearing locking piece abuts against the bearing, the locking pin abuts against the fixed shaft on one side and abuts against the abutting piece on the other side.

Description

Technical Field

[0001] This disclosure generally relates to the field of transmission mechanism technology. More specifically, this disclosure relates to an adjustment and locking structure for bearings and a gearbox. Background Technology

[0002] In transmission systems such as those used in mining dump trucks, bearings are installed between the reducer frame and the output section, bearing the final stage of torque transmission and load-bearing in the drive system. Because these bearings bear high loads and large torques, specific requirements for the axial clearance of their inner and outer rings must be specified during design calculations. Since these requirements vary between different products, a bearing axial clearance adjustment device is necessary. Currently, most products on the market achieve bearing adjustment through a pressure plate and shim structure, coupled with threaded locking or axial retraction locking for final locking. However, pressure plates, shims, and threaded locking achieve locking by adjusting the position of the set screw to cause partial thread protrusion and misalignment, inherently carrying the risk of screw loosening. Axial retraction locking requires adjusting the pitch of a section of the thread in the two halves of the nut with bolts to lock the threads, not only posing a risk of bolt loosening but also requiring significant space, contradicting the compact design principle of drive systems. Furthermore, drive systems typically have a maintenance cycle of 4-5 years, making the prevention of loosening of the internal structure a critical requirement during this period.

[0003] In view of this, there is an urgent need to provide an adjustment and locking structure and gearbox for bearings in order to improve the stability of the locking structure. Utility Model Content

[0004] In order to at least solve one or more of the technical problems mentioned above, this disclosure proposes an adjustment locking structure for bearings and a gearbox in several aspects.

[0005] In a first aspect, this disclosure provides an adjustment and locking structure for a bearing, comprising: an abutment; a fixed shaft, the abutment being disposed on one side of the fixed shaft along its axial direction, and the bearing being disposed on the outer periphery of the fixed shaft; a bearing locking member threadedly connected to the fixed shaft along its axial direction, the side of the bearing locking member opposite to the abutment abutting against the bearing; and a locking pin fixedly connected to the bearing locking member and the fixed shaft, one side of the locking pin abutting against the fixed shaft, and the other side abutting against the abutment.

[0006] In some embodiments, the end of the bearing locking member facing the bearing is provided with a grinding section extending axially.

[0007] In some embodiments, the grinding section has an annular cross-section.

[0008] In some embodiments, the outer diameter of the grinding section is smaller than the maximum outer diameter of the bearing locking element.

[0009] In some embodiments, the outer diameter of the grinding section is set to be equal to the outer diameter of the axial exposed surface of the inner ring of the bearing.

[0010] In some embodiments, the thread angle of the bearing locking element is 30°.

[0011] In some embodiments, the thread of the bearing locking element is a trapezoidal thread.

[0012] In some embodiments, a locking pin is included, and the end of the bearing locking member has a plurality of locating pin grooves spaced apart around its axis.

[0013] In some embodiments, the locking pin is inserted between the bearing locking member and the fixed shaft, and is fixed relative to the bearing locking member and the fixed shaft by means of form fit.

[0014] In some embodiments, the locking pin is formed in the shape of an elongated strip.

[0015] In a second aspect, this disclosure provides a gearbox including an adjustment locking structure for bearings according to the first aspect and several embodiments.

[0016] By using the above-described adjustment and locking structure and gearbox for bearings, the embodiments disclosed herein improve the stability of the locking mechanism by providing an abutment, a fixed shaft, a bearing locking member arranged around the fixed shaft, and a locking pin, wherein the bearing locking member abuts against the bearing, and the locking pin abuts against the bearing locking member on one side and against the abutment on the other side. Attached Figure Description

[0017] The above and other objects, features, and advantages of exemplary embodiments of this disclosure will become readily apparent upon reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this disclosure are illustrated by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein: Figure 1 An exemplary cross-sectional view of a gearbox with an adjustment locking structure for bearings, according to some embodiments of this disclosure, is shown. Figure 2 It shows Figure 1 A magnified view of part A in the middle; Figure 3 An exemplary front view of a bearing locking member for an adjustment locking structure for a bearing, according to some embodiments of this disclosure, is shown; Figure 4 It shows Figure 3 A schematic diagram of a partial cross-section along line BB. Detailed Implementation

[0018] The technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, not all of them. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0019] It should be understood that the terms “comprising” and “including” used in this disclosure and claims indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0020] It should also be understood that the terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to limit this disclosure. As used in this disclosure and claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in this disclosure and claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations.

[0021] As used in this specification and claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if [described condition or event] is detected" may be interpreted, depending on the context, as "once determined," "in response to determination," "once [described condition or event] is detected," or "in response to detection of [described condition or event]."

[0022] This disclosure provides an adjustment and locking structure for bearings, which includes an abutment, a fixed shaft, a bearing locking member surrounding the fixed shaft, and a locking pin. The bearing locking member abuts against the bearing, and the locking pin abuts against the fixed shaft on one side and against the abutment on the other side, thereby improving the stability of the locking mechanism.

[0023] The specific embodiments disclosed herein will now be described in detail with reference to the accompanying drawings.

[0024] See Figures 1 to 2 , Figure 1 An exemplary cross-sectional view of a gearbox equipped with an adjustment locking structure for bearings, according to some embodiments of this disclosure, is shown. Figure 2 It shows Figure 1 A magnified view of part A in the diagram.

[0025] In this embodiment, the adjustment and locking structure 100 for the bearing includes: an abutment 90, a fixed shaft 10, a bearing locking member 20, and a locking pin 30. The abutment 90 is disposed on one side of the fixed shaft 10 along its axial direction, and the bearing 81 is sleeved on the outer periphery of the fixed shaft 10. The bearing locking member 20 is threadedly connected to the fixed shaft 10 along its axial direction, and the side of the bearing locking member 20 facing away from the abutment 90 abuts against the bearing 81. The locking pin 30 is fixedly connected to the bearing locking member 20 and the fixed shaft 10, and one side of the locking pin 30 abuts against the fixed shaft 10, while the other side abuts against the abutment 90.

[0026] Specifically, the adjustment and locking structure for bearings can be used in transmission structures such as planetary gearboxes, which require adjustable and fixed bearings, to provide axial support and locking for the bearings used therein. The abutment 90 is a structure in the planetary gearbox, such as a planetary gear, positioned on one side of the bearing's axial direction. The fixed shaft 10 is fixed relative to the abutment 90, which is located on one side of the fixed shaft 10's axial direction. The inner ring of the bearing 81 is fitted radially outward from the fixed shaft 10 to support the rotation of the fixed shaft 10. The bearing locking member 20 is a device for directly supporting the bearing 81 axially. It can be generally formed as a ring and surrounds the radially outward of the fixed shaft 10. The bearing locking member 20 can be adjusted relative to the fixed shaft 10 and fixed in an adjustable manner.

[0027] The locking pin 30 is used to fix the bearing locking member 20 and the fixed shaft 10 relative to each other by means of form fit or other methods. One end of the locking pin 30 abuts against an axial positioning surface formed on the fixed shaft 10, and the other end abuts against the abutment member 90 axially. The locking pin 30 can be formed into a generally elongated shape, and the fixed shaft 10 has a side that is adjacent to the bearing locking member 20 in the radial direction. The fixed shaft 10 and the bearing locking member 20 together form a locking pin hole at the position where they abut against each other, which is in a form fit with the locking pin 30. After the locking pin 30 is inserted into the locking pin hole, the fixed shaft 10 and the bearing locking member 20 are fixed relative to each other by the form fit between the fixed shaft 10 and the bearing locking member 20 and the locking pin 30. Thus, the bearing 81 surrounding the fixed shaft 10 is axially abutted by the bearing locking member 20, and the bearing locking member 20 and the fixed shaft 10 are further locked by the locking pin 30 to prevent relative rotation between the bearing locking member 20 and the fixed shaft 10, while the locking pin 30 is axially limited by the abutment member 90 to prevent the locking pin 30 from disengaging.

[0028] By setting a locking pin 30 between the bearing locking member 20 and the fixed shaft 10, and using the abutment member 90 to prevent the locking pin 30 from disengaging, the limited axial space between the abutment member 90 such as the planetary carrier and the bearing locking member 20 in the existing structure can be utilized to achieve axial limiting of the locking pin 30, thereby reducing the risk of the locking structure becoming loose.

[0029] See also Figures 2 to 4 , Figure 3 An exemplary front view of a bearing locking member for an adjustment locking structure for a bearing, according to some embodiments of this disclosure, is shown. Figure 4 It shows Figure 3 A partial cross-sectional view along line BB. Further, or optionally, the bearing locking member 20 has an axially extending grinding section 21 at its end facing the bearing. The end face of this grinding section 21 facing the bearing is used to abut against the axial side of the bearing's inner ring. The required axial clearance of the bearing can be measured on-site, and the required machining allowance can be calculated before removing the corresponding length of the grinding section 21 material to achieve axial length adjustment. In this embodiment, the grinding section 21 has an annular cross-section, and its outer diameter is set to be equal to the outer diameter of the axial exposed surface of the bearing's inner ring. Therefore, the grinding section 21, formed with an annular cross-section, can uniformly abut against the side of the bearing's inner ring, reducing the probability of bearing misalignment due to uneven distribution of axial support force. The thread of the bearing locking member 20 terminates axially at the radially inner side of the grinding section 21, thereby avoiding thread deformation caused by the grinding process.

[0030] Furthermore, the outer diameter of the grinding section 21 is smaller than the maximum outer diameter of the bearing locking member 20. The axial length of the grinding section 21 can be set to be equal to the expected limit adjustment amount, while the outer diameter of the grinding section 21 can be set to be equal to the outer diameter of the axial exposed surface of the bearing inner ring. The maximum outer diameter of the bearing locking member 20 can be set to be larger to obtain higher overall structural strength and reduce the possibility of deformation under pressure. By setting the outer diameter of the grinding section 21 to be smaller than the maximum outer diameter of the bearing locking member 20, the amount of machining required to adjust the grinding section 21 can be reduced, thereby improving the efficiency of assembly production.

[0031] In this embodiment, the bearing locking member 20 is connected to the fixed shaft 10 via a thread, and the locking pin 30 is inserted between the bearing locking member 20 and the fixed shaft 10, and is fixed relative to the locking pin 30 and the fixed shaft 10 through a form fit or other means. Because the locking pin 30 forms a form fit with the bearing locking member 20 and the fixed shaft 10, the bearing locking member 20 cannot rotate relative to the fixed shaft 10, thereby preventing the threaded connection between the bearing locking member 20 and the fixed shaft 10 from loosening. The thread profile angle of the bearing locking member 20 is 30°. Compared with conventional locking nuts using 60° or 55° thread profile angles, setting the thread of the bearing locking member 20 to a 30° thread profile angle not only gives the bearing locking member 20 better transmission performance, but also makes the installation and disassembly of the bearing locking member 20 easier and more convenient when the size of the related transmission components is large. Further or optionally, the thread of the bearing locking member 20 is a trapezoidal thread. Compared with the conventional locking nut using a triangular thread, by setting the thread of the bearing locking component 20 to a trapezoidal thread, its thread profile thickness is larger, and its ability to bear the axial load of the bearing is stronger, thus making the bearing locking component 20 more suitable for large-size transmission components.

[0032] See you again Figures 2 to 4 In this embodiment, a locking pin 30 is provided, and the end of the bearing locking member 20 may be provided with a plurality of positioning pin grooves 210 spaced apart around the axis of the bearing locking member 20. The positioning pin grooves 210 are generally semi-cylindrical grooves. During installation, one of the plurality of positioning pin grooves 210 can be rotated to align with a positioning groove on the fixed shaft 10 to accommodate and lock the locking pin 30 together. By providing a plurality of positioning pin grooves 210, when adjusting the axial position of the bearing locking member 20 by means of machining with the mating grinding section 21, the rotation adjustment angle required for the positioning pin groove 210 to align with the positioning groove on the fixed shaft 10 is smaller, thereby improving the position adjustment accuracy.

[0033] Furthermore, those skilled in the art will understand that this disclosure does not limit the number of locking pins 30, locating pin grooves 210, and locating grooves on the fixed shaft 10. For example, in some embodiments not shown, a locking pin 30 is provided, and only one locating pin groove 210 is provided on the end of the bearing locking member 20, which can be aligned with a locating groove provided on the fixed shaft 10 to jointly accommodate and lock the locking pin 30.

[0034] In some other embodiments (not shown), the adjusting locking structure includes multiple locking pins 30. The end of the bearing locking member 20 has multiple locating pin grooves spaced apart around its axis. Simultaneously, the fixed shaft 10 also has multiple corresponding locating grooves. During the screwing of the bearing locking member 20 relative to the fixed shaft 10, the multiple locating grooves and locating pin grooves can be rotated to align one-to-one by machining the grinding section 21, forming multiple locking pin holes. By providing multiple locking pin holes and correspondingly multiple locking pins 30, the bearing locking member 20 can be supported by the multiple locking pins 30 at the corresponding positions of the multiple pin holes, making the axial restraint on the bearing locking member 20 more uniform and reducing the probability of bearing locking assembly misalignment due to misalignment of the restraining support.

[0035] According to some embodiments of the present disclosure, an adjustment and locking structure for bearings includes an abutment member, a fixed shaft, a bearing locking member arranged around the fixed shaft, and a locking pin. The bearing locking member abuts against the bearing, and the locking pin abuts against the bearing locking member on one side and against the abutment member on the other side. This adjustment and locking structure for bearings can be used in space-constrained structures such as mining dump truck drive systems. By utilizing an existing abutment member structure to achieve a locking function and prevent loosening, it improves the stability of the bearing axial locking mechanism.

[0036] See you again Figure 1 The embodiments disclosed herein also provide a gearbox 200, which includes an adjustment and locking structure 100 for a bearing according to several embodiments of the present disclosure, and a transmission assembly 83 and a bearing 81 disposed within the gearbox 200. One or more fixed shafts on the transmission assembly 83 can cooperate with the adjustment and locking structure 100 for the bearing to fix the axial position of the bearing 81.

[0037] While numerous embodiments of this disclosure have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many modifications, alterations, and alternatives will occur to those skilled in the art without departing from the spirit and intent of this disclosure. It should be understood that various alternatives to the embodiments of this disclosure described herein may be employed in the practice of this disclosure. The appended claims are intended to define the scope of this disclosure and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. An adjustment and locking structure for a bearing, characterized in that, include: Connecting piece (90); A fixed shaft (10) is provided on one side of the axial direction of the fixed shaft (10), and the bearing is provided on the outer periphery of the fixed shaft (10). The bearing locking member (20) is threadedly connected to the fixed shaft (10) along the axial direction of the fixed shaft (10), and the bearing locking member (20) abuts against the bearing on the side opposite to the abutment member (90); The locking pin (30) is fixedly connected to the bearing locking member (20) and the fixed shaft (10), and one side of the locking pin (30) abuts against the fixed shaft (10), and the other side abuts against the abutting member (90).

2. The adjustment and locking structure according to claim 1, characterized in that, The bearing locking member (20) has an axially extending grinding section (21) at the end facing the bearing.

3. The adjustment and locking structure according to claim 2, characterized in that, The grinding section (21) has an annular cross section.

4. The adjustment and locking structure according to claim 3, characterized in that, The outer diameter of the grinding section (21) is smaller than the maximum outer diameter of the bearing locking member (20).

5. The adjustment and locking structure according to claim 3, characterized in that, The outer diameter of the grinding section (21) is set to be equal to the outer diameter of the axial exposed surface of the inner ring of the bearing.

6. The adjustment and locking structure according to claim 1, characterized in that, The thread angle of the bearing locking member (20) is 30°.

7. The adjustment and locking structure according to claim 1, characterized in that, The thread of the bearing locking part (20) is a trapezoidal thread.

8. The adjustment and locking structure according to claim 1, characterized in that, Includes a locking pin (30), and the end of the bearing locking member (20) has a plurality of locating pin grooves spaced apart around its axis.

9. The adjustment and locking structure according to claim 1, characterized in that, The locking pin (30) is inserted between the bearing locking member (20) and the fixed shaft (10), and is fixed relative to the bearing locking member (20) and the fixed shaft (10) by means of shape fit.

10. The adjustment and locking structure according to claim 1, characterized in that, The locking pin (30) is formed in the shape of an elongated strip.

11. A gearbox, characterized in that, Includes an adjustment locking structure for bearings according to any one of claims 1 to 10.

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