Gearbox bearing clearance measuring device

Abstract

The utility model relates to the technical field of gear boxes, in particular to a gear box bearing clearance measuring device. A connector of the gear box bearing clearance measuring device is used for being connected with an input shaft of a gear box, a positioner is connected with the connector, and a rotating seat can be connected to the positioner and achieves a rotating function through a built-in bearing; the rotating handle is connected with the positioner and is used for driving the positioner and the input shaft to rotate; the lifting assembly is used for being connected with a cover plate of the gearbox and connected with the rotating base through a fork rod. The lifting assembly is used for applying external force to the input shaft through the rotating seat; the support is used for being connected with a cover plate of the gearbox, the measuring dial indicator is connected with the support, and a measuring head of the measuring dial indicator abuts against the measuring face of the positioner. The gear box bearing clearance measuring device is simple in structure and convenient to use, can ensure free rotation of the input shaft in the use process of the device, can meet the detection requirements of gear boxes under different placement conditions, and can adapt to gear boxes with different parameters.

Description

Technical Field

[0001] This utility model relates to the field of gearbox technology, and more specifically, to a gearbox bearing clearance measuring device. Background Technology

[0002] In the gearbox industry, the actual axial clearance of each shaft system after product assembly significantly impacts bearing life, load-bearing stability, and shaft system operational stability. Therefore, detecting axial clearance after gearbox assembly is a key aspect of product quality control. In the rail transit gearbox sector, the input shaft system, being the highest-speed shaft system, has particularly important clearance parameters. Input shaft systems typically employ a common configuration of two cylindrical bearings and one four-point ball bearing, with the axial clearance determined after the four-point ball bearing assembly. As products enter their maintenance cycles, bearing clearance measurements after operational wear require more stringent conditions. Therefore, designing adjustable tools that meet process requirements and are suitable for various product models is essential.

[0003] Currently, after the input shaft system is assembled, it is placed vertically before measurement. The input shaft system is rotated in both directions to allow its own weight to press and correct the bearing position. A dial indicator is installed axially to measure and record the initial point data. The input shaft system is then lifted, and the dial indicator data is recorded. The difference between the initial data and the measured data is calculated; this difference is the axial clearance of the input shaft system.

[0004] However, rail transit gearboxes cannot be completely disassembled during maintenance and do not have the conditions for vertical placement. In most cases, the input shaft clearance measurement must be carried out in a horizontal state. However, in a horizontal state, the bearings cannot be corrected by the weight of the shaft system itself, which cannot guarantee the reliability of bearing contact and the stability of measurement data. In addition, the current working conditions for measuring the input shaft clearance of gearboxes in the rail transit industry are affected by different manufacturers and different designs, resulting in a variety of actual measurement conditions. Utility Model Content

[0005] The purpose of this utility model is to provide a gearbox bearing clearance measuring device, which has a simple structure and is easy to use. During the use of the device, the input shaft can still be freely rotated. It can be applied to the testing needs of gearboxes under different placement conditions and can be adapted to gearboxes with different parameters.

[0006] The embodiments of this utility model can be implemented as follows:

[0007] This utility model provides a gearbox bearing clearance measuring device, which includes a rotating connection assembly, a lifting assembly, a support, and a measuring dial indicator;

[0008] The rotary connection assembly includes a connector, a positioner, a rotating base, and a rotary handle; the connector is used to connect to the input shaft of the gearbox, the positioner is connected to the connector, the rotating base is connected to the positioner and achieves rotation through an internal bearing; the rotary handle is connected to the positioner and is used to drive the positioner and the input shaft to rotate under the action of external force.

[0009] The lifting assembly is used to connect with the cover plate of the gearbox, and the lifting assembly is connected to the rotating seat through the fork; the lifting assembly is used to apply external force to the input shaft along the axial direction of the input shaft through the rotating seat under the action of external force;

[0010] The support is used to connect with the cover plate of the gearbox, the dial indicator is connected to the support, and the probe of the dial indicator rests against the measuring surface of the positioner.

[0011] In an optional embodiment, the outer periphery of the rotating seat is provided with a pin mounting hole, and a transmission pin that is connected to the lifting assembly is installed in the pin mounting hole.

[0012] In an optional embodiment, the lifting assembly includes a lifting seat, a lifting rod, a positioning block, a fork, and a torque wrench;

[0013] One end of the lifting rod is threadedly connected to the lifting seat, and the other end of the lifting rod is rotatably connected to the positioning block;

[0014] The fork is hinged to the positioning block, and both ends of the fork are connected to the drive pin and the torque wrench, respectively; along the extension direction of the fork, the hinge point between the fork and the positioning block is located between the drive pin and the torque wrench.

[0015] The torque wrench is used to apply external force to the input shaft along the axial direction of the input shaft through the fork under the action of external force.

[0016] In an optional embodiment, the head of the fork is provided with a U-shaped groove that mates with the drive pin.

[0017] In an optional implementation, the tail of the fork is provided with a torque interface for connection to a torque wrench.

[0018] In an optional embodiment, the fork is provided with a plurality of locating pin holes in the middle, and the plurality of locating pin holes are spaced apart along the extension direction of the fork.

[0019] The lifting assembly also includes a hinged hole bolt, a limit nut, and a cotter pin; the hinged hole bolt is connected to the positioning block and mates with one of the positioning pin holes, and extends through the fork rod to connect with the limit nut and the cotter pin.

[0020] In an optional embodiment, the lifting assembly further includes a limiting ring connected to the lifting rod, and a rotating ring rotatably connected within the combined space of the positioning block and the limiting ring.

[0021] In an optional implementation, the head of the positioner is provided with a square head interface that connects to the rotating handle.

[0022] In an optional embodiment, the rotary connection assembly further includes an axial locking element; the positioner is configured with a limiting stage; the axial locking element is connected to the positioner and spaced apart from the limiting stage;

[0023] The rotating seat is fitted onto the positioner and is rotatably connected to the positioner. The two ends of the rotating seat abut against the limiting platform and the axial locking member, respectively.

[0024] In an optional embodiment, the axial locking element includes a thrust ball bearing, a clamping nut, a gland, and a set screw;

[0025] The rotating seat is rotatably connected to the positioner via a thrust ball bearing. The clamping nut is connected to the positioner and abuts against the end of the thrust ball bearing opposite to the rotating seat.

[0026] The gland is connected to the rotating seat by a set screw, and the gland is located at the end of the clamping nut away from the thrust ball bearing.

[0027] The beneficial effects of the gearbox bearing clearance measuring device provided in this embodiment of the invention include:

[0028] The gearbox bearing clearance measuring device includes a rotating connection assembly, a lifting assembly, a support, and a dial indicator. The rotating connection assembly includes a connector, a positioner, a rotating base, and a rotating handle. The connector is used to connect to the input shaft of the gearbox, the positioner is connected to the connector, and the rotating base is rotatably connected to the positioner. The rotating handle is connected to the positioner and is used to drive the positioner and the input shaft to rotate under the action of external force. The lifting assembly is used to connect to the cover plate of the gearbox and is connected to the rotating base. The lifting assembly is used to apply external force to the input shaft along the axial direction of the input shaft via the rotating base under the action of external force. The support is used to connect to the cover plate of the gearbox, the dial indicator is connected to the support, and the probe of the dial indicator rests against the measuring surface of the positioner.

[0029] This gearbox bearing clearance measuring device has a simple structure and is easy to use. During operation, it ensures free rotation of the input shaft, making it suitable for testing gearboxes under various placement conditions and adaptable to gearboxes with different parameters. It uses a torque wrench to apply force, ensuring reliable calibration, while an independent rotating handle allows free rotation of the shaft system under calibration force. Furthermore, it can cover different product interfaces by changing connectors, and the lifting assembly can adjust the input shaft parameters of various models, thus meeting the testing needs of gearbox input shafts under different placement conditions and satisfying diverse product requirements in the industry. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the gearbox bearing clearance measuring device provided in this embodiment from a first-view perspective.

[0032] Figure 2 This is a schematic diagram of the gearbox bearing clearance measuring device provided in this embodiment from a second perspective.

[0033] Figure 3 This is a schematic diagram of the rotating connection assembly provided in this embodiment;

[0034] Figure 4 This is a schematic diagram of the structure of the two connectors provided in this embodiment;

[0035] Figure 5 This is a structural schematic diagram of the lifting seat, lifting rod, and positioning block provided in this embodiment.

[0036] Icons: 100-Gearbox bearing clearance measuring device; 110-Rotary connection assembly; 130-Lifting assembly; 150-Support; 170-Measuring dial indicator; 111-Connector; 111A-First connector; 111B-Second connector; 112-Positioner; 113-Rotating seat; 114-Rotating handle; 10-Gearbox; 11-Input shaft; 12-Cover plate; 115-Pin mounting hole; 116-Transmission pin Shaft; 131-Lifting seat; 132-Lifting rod; 133-Positioning block; 134-Fork rod; 137-Torque interface; 138-Positioning pin hole; 139-Reaming bolt; 141-Limit nut; 142-Cotter pin; 143-Limit ring; 117-Square head interface; 118-Axial locking element; 119-Limiting platform; 121-Thrust ball bearing; 122-Pressure nut; 123-Pressure cap; 124-Set screw. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0039] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0040] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0041] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0042] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0043] Please refer to Figures 1-4 This embodiment provides a gearbox bearing clearance measuring device 100, which includes a rotating connection assembly 110, a lifting assembly 130, a support 150, and a measuring dial indicator 170.

[0044] The rotating connection assembly 110 includes a connector 111, a positioner 112, a rotating seat 113, and a rotating handle 114. The connector 111 is used to connect to the input shaft 11 of the gearbox 10. The positioner 112 is connected to the connector 111. The rotating seat 113 is connected to the positioner 112 and achieves rotation through an internal bearing. The rotating handle 114 is connected to the positioner 112 and is used to drive the positioner 112 and the input shaft 11 to rotate under the action of external force.

[0045] The lifting assembly 130 is used to connect with the cover plate 12 of the gearbox 10. The lifting assembly 130 is connected to the rotating seat 113 via the fork 134. The lifting assembly 130 is used to apply external force to the input shaft 11 along the axial direction of the input shaft 11 via the rotating seat 113 under the action of external force.

[0046] The support 150 is used to connect with the cover plate 12 of the gearbox 10. The measuring dial indicator 170 is connected to the support 150, and the probe of the measuring dial indicator 170 rests against the measuring surface of the positioner 112.

[0047] Please refer to Figures 1-4 The working principle of the gearbox bearing clearance measuring device 100 is as follows:

[0048] First, the gearbox bearing clearance measuring device 100 is used to detect the axial clearance of the input shaft 11. During the detection process, the input shaft 11 of the gearbox 10 can be placed horizontally, vertically, or in other positions. That is, the gearbox bearing clearance measuring device 100 is not limited by the position of the gearbox 10 during the detection process.

[0049] Specifically, the gearbox bearing clearance measuring device 100 includes a rotating connection assembly 110, a lifting assembly 130, a support 150, and a measuring dial indicator 170;

[0050] The rotating connection assembly 110 includes a connector 111, a positioner 112, a rotating seat 113, and a rotating handle 114. The connector 111 is used to connect to the input shaft 11 of the gearbox 10, the positioner 112 is connected to the connector 111, and the rotating seat 113 is rotatably connected to the positioner 112. The rotating handle 114 is connected to the positioner 112 and is used to drive the positioner 112 and the input shaft 11 to rotate under the action of external force. Thus, with this arrangement, the connector 111 can be used to dock with the end of the input shaft 11.

[0051] Furthermore, when setting the connector 111, the connector 111 is used to connect with the input shaft 11 interface of the gearbox 10 in the rail transit industry. In this way, by configuring various types of connectors 111, this embodiment provides a first connector 111A and a second connector 111B, and the connector 111 is used as a replaceable part. That is, by replacing the corresponding connector 111 for different types of gearbox 10 interfaces, the requirements of each type of interface can be met. In this way, when the input shaft 11 is tested, the corresponding compatible connector 111 can be selected for connection, thereby improving its adaptability.

[0052] During the testing process, the positioner 112 is connected to the connector 111, so that when the handle is rotated, the input shaft 11 can be driven to rotate through the positioner 112 and the connector 111. The rotating seat 113 is rotatably connected to the positioner 112. Therefore, when the input shaft 11 is driven to rotate, the rotating seat 113 can maintain its position while connected to the lifting assembly 130.

[0053] The lifting assembly 130 is used to connect with the cover plate 12 of the gearbox 10 and is also connected to the rotating seat 113. The lifting assembly 130 is used to apply external force to the input shaft 11 along the axial direction of the input shaft 11 via the rotating seat 113 under the action of external force. Thus, with this arrangement, during the detection process, the lifting assembly 130 applies axial force to the input shaft 11 via the rotating seat 113, the positioner 112, and the connector 111, thereby driving the input shaft 11 to move along its axial direction. Based on this arrangement, the detection work of the input shaft 11 clearance can be avoided from being affected by the position of the input shaft 11 of the gearbox 10.

[0054] The support 150 is used to connect with the cover plate 12 of the gearbox 10. The measuring dial indicator 170 is connected to the support 150, and the probe of the measuring dial indicator 170 abuts against the measuring surface of the positioner 112. Thus, during the testing process, the clearance test data of the input shaft 11 can be obtained based on the test data of the measuring dial indicator 170.

[0055] In summary, the gearbox bearing clearance measuring device 100 has a simple structure and is easy to use. It is suitable for the testing needs of gearboxes 10 under different placement conditions and can be adapted to gearboxes 10 with different parameters. It uses a torque wrench to apply force to ensure the reliability of the calibration force, while the independent rotating handle 114 enables the shaft system to rotate freely under the calibration force. Moreover, it can achieve full coverage of different product interfaces by changing the connector 111, and the lifting and adjusting component 130 can cover the parameter requirements of the input shaft 11 of various models. Thus, it can meet the testing needs of the input shaft 11 of gearboxes 10 under different placement conditions and meet the different product needs of the existing industry.

[0056] Please refer to Figures 1-4 The testing steps of the gearbox bearing clearance measuring device 100 are as follows:

[0057] First, select the appropriate connector 111, mate the connector 111 with the positioner 112 and the input shaft 11, and install the lifting assembly 130, the support 150 and the measuring dial indicator 170.

[0058] After applying the specified clamping force to the input shaft 11 to be measured by operating the lifting assembly 130, rotate the handle 114 more than 5 full revolutions in both directions and record the reading of the dial indicator 170.

[0059] After applying the lifting force by operating the lifting assembly 130, repeat the above operation and compare the readings of the dial indicator 170 twice. The difference between the two readings is the axial clearance of the input shaft 11.

[0060] Further, please refer to Figures 1-4In this embodiment, to facilitate the connection between the lifting assembly 130 and the rotating seat 113, and to apply axial force to the input shaft 11 via the rotating seat 113, a pin mounting hole 115 is provided on the outer periphery of the rotating seat 113. A transmission pin 116, which is connected to the lifting assembly 130, is mounted in the pin mounting hole 115. It should be noted that this arrangement facilitates the assembly of the lifting assembly 130 and the rotating seat 113. Simultaneously, this structural arrangement facilitates the connection between the lifting assembly 130 and the rotating seat 113, thereby maintaining the docking state between the rotating seat 113 and the lifting assembly 130. That is, during the connection between the lifting assembly 130 and the rotating seat 113 via the transmission pin 116, when the positioner 112 rotates the input shaft 11 around its axis under the rotation of the rotating handle, the rotating seat 113 will not rotate with the rotation of the positioner 112.

[0061] In this embodiment, the function of the configured lifting assembly 130 is to apply an axial force to the input shaft 11 via the rotating connection assembly 110. The steps for applying the axial force are as described above and will not be repeated here. Based on this, please refer to... Figures 1-5 The lifting assembly 130 provided in this embodiment may include a lifting seat 131, a lifting rod 132, a positioning block 133, and a torque wrench;

[0062] One end of the lifting rod 132 is threadedly connected to the lifting seat 131, and the other end of the lifting rod 132 is rotatably connected to the positioning block 133; thereby realizing the threaded lifting adjustment function.

[0063] The fork 134 is hinged to the positioning block 133, and both ends of the fork 134 are connected to the drive pin 116 and the torque wrench, respectively; along the extension direction of the fork 134, the hinge point between the fork 134 and the positioning block 133 is located between the drive pin 116 and the torque wrench.

[0064] The torque wrench is used to apply external force to the input shaft 11 along the axial direction of the input shaft 11 through the fork 134 under the action of external force.

[0065] With the above-described structural arrangement, since the fork 134 is hinged to the positioning block 133, and both ends of the fork 134 are connected to the transmission pin 116 and the torque wrench respectively, and the hinge point between the fork 134 and the positioning block 133 is located between the transmission pin 116 and the torque wrench along the extension direction of the fork 134, a lever effect can be formed through this structural arrangement. Thus, when an external force is applied to the fork 134 by the torque wrench, the end of the fork 134 connected to the transmission pin 116 is subjected to an external force along the axial direction of the input shaft 11, thereby pressing down or pulling up the input shaft 11. Moreover, the torque wrench can apply an axial force to the input shaft 11 as needed. Based on the above, after the lifting seat 131 is connected to the cover plate 12 of the gearbox 10, the height of the positioning block 133 can be adjusted by rotating the lifting rod 132, thereby adapting to input shafts 11 with different parameters.

[0066] When configuring the fork 134, since both ends of the fork 134 are connected to the drive pin 116 and the torque wrench respectively, in order to facilitate the connection between the fork 134 and the drive pin 116 and the torque wrench, the head of the fork 134 is provided with a U-shaped groove that mates with the drive pin 116, and the tail of the fork 134 is provided with a torque interface 137 that connects to the torque wrench.

[0067] It should be noted that the purpose of configuring the U-shaped groove at the head of the fork 134 is to allow relative rotation between the transmission pin 116 and the U-shaped groove during the application of axial force to the input shaft 11 via a torque wrench, thereby ensuring that the external force acting on the input shaft 11 is an external force along the axial direction of the input shaft 11. Therefore, the opening of the U-shaped groove is made to a certain length to accommodate slight displacement of the input shaft 11.

[0068] Further, please refer to Figures 1-5 Since the middle area of ​​the fork 134 needs to be hinged to the positioning block 133, and as mentioned above, the fork 134 is designed to act as a lever during operation. Therefore, to adjust the force applied, the middle of the fork 134 is provided with multiple positioning pin holes 138, spaced apart along the extension direction of the fork 134. This arrangement facilitates adjusting the external force applied to the input shaft 11 based on the lever action, according to measurement requirements, or to reduce effort during measurement. It should be noted that the operating torque can be adjusted using different positioning pin holes 138 through a torque calculation formula. Taking three positioning pin holes 138 as an example, the positioning pin holes 138 on both sides can respectively accommodate a 1.4-fold increase and a 0.7-fold decrease in operating torque.

[0069] Based on this, please refer to Figures 1-5When the fork 134 is connected to the positioning block 133, this embodiment adopts the following method: the lifting assembly 130 also includes a hinged hole bolt 139, a limit nut 141 and a cotter pin 142; the hinged hole bolt 139 is connected to the positioning block 133 and cooperates with one of the positioning pin holes 138, and after passing through the fork 134, it is connected to the limit nut 141 and the cotter pin 142.

[0070] When connecting the lifting rod 132 to the positioning block 133, this embodiment uses a lifting assembly 130 that also includes a limiting ring 143. The limiting ring 143 is connected to the lifting rod 132, and the limiting ring 143 is rotatably connected within the combined space of the positioning block 133 and the limiting ring 143.

[0071] Based on the above, please refer to Figures 1-5 When configuring the rotating connection assembly 110, in order to facilitate the connection between the rotating handle and the positioner 112, and thus drive the positioner 112 to rotate under the action of the rotating handle, the head of the positioner 112 is provided with a square head interface 117 that is connected to the rotating handle 114.

[0072] Furthermore, when the lifting assembly 130 applies an axial force to the input shaft 11 through the force between the fork 134 and the rotating seat 113, in order to prevent the rotating seat 113 from moving or displacing relative to the locator 112, the rotating connection assembly 110 also includes an axial locking member 118. The purpose of this is to prevent the rotating seat 113 from displacing relative to the locator 112 along the axis of the input shaft 11. The locator 112 is equipped with a limiting platform 119. The axial locking member 118 is connected to the locator 112 and spaced apart from the limiting platform 119. The rotating seat 113 is sleeved on the locator 112 and rotatably connected to the locator 112. The two ends of the rotating seat 113 abut against the limiting platform 119 and the axial locking member 118, respectively.

[0073] For details, please refer to Figures 1-5 The axial locking component 118 includes a thrust ball bearing 121, a clamping nut 122, a pressure cap 123, and a set screw 124. The rotating seat 113 is rotatably connected to the positioner 112 via the thrust ball bearing 121. The clamping nut 122 is connected to the positioner 112 and abuts against the end of the thrust ball bearing 121 opposite to the rotating seat 113. The pressure cap 123 is connected to the rotating seat 113 via the set screw 124, and the pressure cap 123 is limited to the end of the clamping nut 122 opposite to the thrust ball bearing 121. The thrust ball bearing 121 ensures that the rotating seat 113 can still rotate normally after being subjected to axial force.

[0074] Therefore, through the above structural arrangement, the rotating seat 113 can be rotatably connected to the positioner 112, transmit force along the axial direction of the input shaft 11, and keep the position of the rotating seat 113 and the positioner 112 unchanged along the axial direction of the input shaft 11, thereby improving the detection accuracy of axial clearance.

[0075] In summary, please refer to Figures 1-5 The operating steps of the gearbox bearing clearance measuring device 100 are as follows:

[0076] First, select the corresponding connector 111 according to the input shaft 11 interface of different types of gearboxes 10, install the connector 111 onto the input shaft 11, and after assembling the positioner 112 and the rotating seat 113, install them into the connector 111 connection interface.

[0077] Select the appropriate locating pin hole 138 on the fork 134 according to the required torque value and the radial position of the input shaft 11, and install the fork 134 onto the locating block 133;

[0078] Install the assembled lifting assembly 130 into the threaded interface of the cover plate 12 of the gearbox 10, and insert the fork 134 into the transmission pin 116. Adjust the height of the lifting rod 132 according to the height of the input shaft 11. Install the quick-connect rotating handle 114 to the four-way interface of the positioner 112. Through the measuring dial indicator 170 on the support 150, the indicator head hits the measuring surface of the positioner 112.

[0079] Subsequently, the torque wrench of the lifting assembly 130 is used to apply the specified clamping force to the input shaft 11 to be measured. The handle 114 is rotated more than 5 full revolutions in both directions, and the reading of the dial gauge 170 is recorded.

[0080] After applying the lifting force by operating the torque wrench of the lifting assembly 130, repeat the above operation and compare the readings of the dial indicator 170 twice. The difference between the two readings is the axial clearance of the input shaft 11.

[0081] The gearbox bearing clearance measuring device 100 has the following advantages:

[0082] Multiple selectable interfaces are added to the fork 134 to reduce the torque value as required and amplify the torque value as required, effectively improving the convenience of operation. Adopting a multi-component combination, the interfaces of the rotating connection assembly 110 and the input shaft 11 can be directly replaced according to different requirements, and the loss of a single component can be independently replaced, effectively improving the versatility and economy of the equipment. A quick-connect rotating handle is located on the outside of the entire rotating connection assembly 110, allowing convenient free circular rotation of the input shaft 11 system in both forward and reverse directions under load to meet existing maintenance requirements in the industry. The lifting assembly 130 can be adjusted in overall height using a conventional open-end wrench to cover the input shaft 11 parameter requirements of various models, effectively increasing the practicality of the equipment.

[0083] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A gearbox bearing clearance measuring device, characterized in that: The gearbox bearing clearance measuring device includes a rotating connection assembly, a lifting assembly, a support, and a measuring dial indicator; The rotating connection assembly includes a connector, a positioner, a rotating seat, and a rotating handle; the connector is used to connect to the input shaft of the gearbox, the positioner is connected to the connector, the rotating seat is connected to the positioner and achieves rotation through an internal bearing; the rotating handle is connected to the positioner and is used to drive the positioner and the input shaft to rotate under the action of external force. The lifting assembly is used to connect with the cover plate of the gearbox, and the lifting assembly is connected to the rotating seat through a fork; the lifting assembly is used to apply an external force to the input shaft along the axial direction of the input shaft through the rotating seat under the action of an external force; The support is used to connect with the cover plate of the gearbox, the dial indicator is connected to the support, and the probe of the dial indicator abuts against the measuring surface of the positioner.

2. The gearbox bearing clearance measuring device according to claim 1, characterized in that: The outer periphery of the rotating seat is provided with a pin mounting hole, and a transmission pin that is connected to the lifting assembly is installed in the pin mounting hole.

3. The gearbox bearing clearance measuring device according to claim 2, characterized in that: The lifting assembly includes a lifting base, a lifting rod, a positioning block, and a torque wrench; One end of the lifting rod is threadedly connected to the lifting seat, and the other end of the lifting rod is rotatably connected to the positioning block; The fork is hinged to the positioning block, and both ends of the fork are respectively connected to the transmission pin and the torque wrench; along the extension direction of the fork, the hinge point between the fork and the positioning block is located between the transmission pin and the torque wrench; The torque wrench is used to apply external force to the input shaft along the axial direction of the input shaft through the fork under the action of external force.

4. The gearbox bearing clearance measuring device according to claim 3, characterized in that: The head of the fork is provided with a U-shaped groove that mates with the drive pin.

5. The gearbox bearing clearance measuring device according to claim 3, characterized in that: The tail of the fork is provided with a torque interface for connection to the torque wrench.

6. The gearbox bearing clearance measuring device according to claim 3, characterized in that: The fork has multiple positioning pin holes in its middle section, and these positioning pin holes are spaced apart along the extension direction of the fork. The lifting assembly also includes a hinged hole bolt, a limit nut, and a cotter pin; the hinged hole bolt is connected to the positioning block and engages with one of the positioning pin holes, and extends through the fork rod to connect with the limit nut and the cotter pin.

7. The gearbox bearing clearance measuring device according to claim 3, characterized in that: The lifting assembly also includes a limiting ring, which is connected to the lifting rod, and the lifting rod is rotatably connected within the combined space of the positioning block and the limiting ring.

8. The gearbox bearing clearance measuring device according to claim 1, characterized in that: The head of the positioner is provided with a square head interface that connects to the rotating handle.

9. The gearbox bearing clearance measuring device according to any one of claims 1-8, characterized in that: The rotary connection assembly further includes an axial locking element; the positioner is configured with a limiting stage; the axial locking element is connected to the positioner and spaced apart from the limiting stage; The rotating seat is sleeved on the positioner and rotatably connected to the positioner. The two ends of the rotating seat abut against the limiting platform and the axial locking member, respectively.

10. The gearbox bearing clearance measuring device according to claim 9, characterized in that: The axial locking component includes a thrust ball bearing, a clamping nut, a pressure cap, and a set screw; The rotating seat is rotatably connected to the positioner via the thrust ball bearing, and the clamping nut is connected to the positioner and abuts against the end of the thrust ball bearing opposite to the rotating seat; The pressure cap is connected to the rotating seat via the set screw, and the pressure cap is located at the end of the clamping nut away from the thrust ball bearing.

Images