Pitch measuring tool for half-open bearing holes of gearbox shell

Abstract

A hole pitch measuring tool for half-open bearing holes of a gearbox shell is supported on two axially aligned half-open bearing holes in the shell of the gearbox and comprises a support, a fixed measuring head fixed at one end of the support and matched with the half-open bearing hole in one side of the shell, and a movable measuring head matched with the half-open bearing hole in the other side of the shell. The device is characterized in that the support is provided with a pneumatic guide assembly capable of driving the movable measuring head to move in the axial direction and a displacement sensor located below the pneumatic guide assembly and connected with an upper computer, and the fixed measuring head abuts against the end face of a semi-open bearing hole in one side of the shell. The movable measuring head is driven by the pneumatic guide assembly to abut against the end face of the semi-open bearing hole in the other side of the shell. The device achieves the automatic measurement of the hole pitch of the semi-open bearing hole, improves the measurement efficiency and precision, is suitable for a gearbox assembly production line, and facilitates the acceleration of the assembly takt of a gearbox.

Description

Technical Field

[0001] This utility model relates to a tooling for measuring the hole spacing of semi-open bearing holes in a gearbox housing, used for measuring the hole spacing of semi-open bearing holes on the gearbox housing. Background Technology

[0002] The gearbox housing consists of a front housing and a rear housing. Both the front and rear housings have semi-open bearing holes. The front and rear housings are joined together to form a bearing hole. The bearings on the drive shaft in the gearbox are all installed in the bearing holes. The semi-open bearing holes corresponding to the bearings at both ends of the shaft are coaxially aligned on the housing. During the assembly process, in order to ensure the fit between the bearing holes, the shaft and the bearings, the end face distance (semi-open bearing hole distance) of the two coaxially aligned semi-open bearing holes on the housing needs to be measured. CN222528520U discloses an auxiliary tooling for measuring the hole spacing of a semi-open bearing hole, including a lever, a front measuring block slidably fitted onto the front end of the lever, a rear measuring block coaxially positioned at the rear end of the lever, and a push rod assembly that can push the lever to move on the front measuring block. The push rod assembly is used to move the lever to adjust the distance between the front and rear measuring blocks, so that the front and rear measuring blocks abut against the end faces of their respective semi-open bearing holes. Then, calipers are used to measure the distance from the front face of the front measuring block to the rear face of the rear measuring block, obtaining the hole spacing of the coaxially aligned semi-open bearing holes on the housing. In the above solution, the adjustment and measurement of the distance between the front and rear measuring blocks are done manually, which is inefficient and has low measurement accuracy, affecting the production cycle of gearbox assembly. The purpose of this solution is to improve the efficiency and accuracy of measuring the hole spacing of semi-open bearing holes. Utility Model Content

[0003] The tooling for measuring the hole spacing of the semi-open bearing holes in the gearbox housing provided by this utility model realizes the automatic measurement of the hole spacing of the semi-open bearing holes, improves the measurement efficiency and accuracy, is suitable for gearbox assembly production lines, and helps to speed up the gearbox assembly cycle.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A fixture for measuring the hole spacing of the semi-open bearing holes in a gearbox housing is supported on two axially aligned semi-open bearing holes on the gearbox housing. It includes a bracket, a fixed probe fixed to one end of the bracket and engaging with one of the semi-open bearing holes on one side of the housing, and a movable probe engaging with the other semi-open bearing hole on the other side of the housing. The fixture is characterized by having a pneumatic guide assembly mounted on the bracket, capable of driving the movable probe to move axially, and a displacement sensor located below the cylinder guide assembly and connected to a host computer. The fixed probe abuts against the end face of the semi-open bearing hole on one side of the housing, while the movable probe abuts against the end face of the semi-open bearing hole on the other side of the housing, driven by the pneumatic guide assembly.

[0006] Preferably, the pneumatic guide assembly includes a cylinder mounted axially along the half-open bearing hole below the bracket and connected to the moving probe, a guide rail mounted on the bracket and parallel to the cylinder, and a slider mounted on the guide rail for guiding cooperation. The slider is slidably fixed to the moving probe and moves on the guide rail as the cylinder extends and retracts.

[0007] Preferably, a connecting frame parallel to the guide rail is fixed on the inner end of the moving probe, the free end of the connecting frame is connected to the telescopic end of the cylinder, and the slider is fixed on the connecting frame.

[0008] Preferably, the displacement sensor is arranged parallel to the bottom of the cylinder and is installed between the bracket and the connecting frame.

[0009] Preferably, a grip handle is fixed to the top of the bracket.

[0010] The beneficial effects of this utility model are:

[0011] This utility model discloses a fixture for measuring the hole spacing of semi-open bearing holes in a gearbox housing. A fixed measuring head is fixed to one end of a bracket. A pneumatic guide assembly drives the moving measuring head to move axially. Before measurement, the fixture is fitted with a calibration housing having standard semi-open bearing hole spacing dimensions. The fixed measuring head is abutted against the end face of the semi-open bearing hole on one side of the calibration housing, and the pneumatic guide assembly drives the moving measuring head to abut against the end face of the semi-open bearing hole on the other side of the calibration housing. At this time, the displacement sensor's sensing value is zeroed. During measurement, the fixture is fitted with the housing to be calibrated, and the fixed measuring head is abutted against the end face of the semi-open bearing hole on one side of the calibration housing. The fixed probe abuts against the end face of the half-open bearing hole on one side of the housing being measured, and is driven by a pneumatic guide assembly to abut against the end face of the half-open bearing hole on the other side of the housing being measured. The displacement sensor transmits real-time sensing data to the host computer. The host computer directly calculates the spacing of the half-open bearing hole in the housing being measured based on the received sensing data and the standard spacing of the half-open bearing hole in the calibrated housing, realizing automatic measurement of the spacing of the half-open bearing hole, improving measurement efficiency and accuracy, adapting to the gearbox assembly production line, and helping to speed up the gearbox assembly cycle. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the tooling for measuring the hole spacing of the semi-open bearing holes in the gearbox housing according to this utility model.

[0013] Figure 2 This is a schematic diagram showing the fit between the tooling for measuring the hole spacing of the semi-open bearing holes in the gearbox housing and the housing. Detailed Implementation

[0014] The following is combined Figures 1-2 The embodiments of this utility model will be described in detail below.

[0015] A fixture for measuring the hole spacing of the semi-open bearing holes in a gearbox housing is supported on two axially aligned semi-open bearing holes 100 on the gearbox housing. It includes a bracket 1, a fixed probe 2 fixed to one end of the bracket 1 and engaging with one of the semi-open bearing holes 100 on one side of the housing, and a movable probe 3 engaging with the other semi-open bearing hole 100 on the other side of the housing. The fixture is characterized in that: the bracket 1 is equipped with a pneumatic guide assembly 4 that can drive the movable probe 3 to move axially, and a displacement sensor 5 located below the pneumatic guide assembly 4 and connected to a host computer; the fixed probe 2 abuts against the end face of the semi-open bearing hole 100 on one side of the housing, and the movable probe 3 abuts against the end face of the semi-open bearing hole 100 on the other side of the housing as driven by the pneumatic guide assembly 4.

[0016] The above-described fixture for measuring the hole spacing of the semi-open bearing holes in the gearbox housing has a fixed measuring head 2 fixed to one end of the bracket 1. The pneumatic guide assembly 4 can drive the moving measuring head 3 to move axially. Before measurement, the fixture is fitted with a calibration housing with standard semi-open bearing hole spacing dimensions. The fixed measuring head 2 is abutted against the end face of the semi-open bearing hole on one side of the calibration housing, and the moving measuring head is abutted against the end face of the semi-open bearing hole on the other side of the calibration housing by the pneumatic guide assembly 4. At this time, the sensing value of the displacement sensor is zeroed. During measurement, the fixture is fitted with the housing to be calibrated, and the fixed measuring head 2 is... The probe 3 abuts against the end face of the half-open bearing hole 100 on one side of the housing, and is driven by the pneumatic guide assembly 4 to abut against the end face of the half-open bearing hole 100 on the other side of the housing being measured. The displacement sensor 5 transmits real-time sensing data to the host computer. The host computer directly calculates the spacing of the half-open bearing hole in the housing being measured based on the received sensing data and the standard half-open bearing hole spacing in the calibrated housing, thereby realizing automatic measurement of the half-open bearing hole spacing, improving measurement efficiency and accuracy, adapting to the gearbox assembly production line, and helping to speed up the gearbox assembly production cycle.

[0017] The pneumatic guide assembly 4 includes a cylinder 41 mounted axially along the half-open bearing hole below the bracket 1 and connected to the movable probe 3, a guide rail 42 mounted on the bracket 1 and parallel to the cylinder 41, and a slider 43 mounted on the guide rail 42 for guiding engagement. The slider 43 is fixedly connected to the movable probe 3 and moves on the guide rail 42 as the cylinder extends and retracts. The cylinder 10 is axially positioned along the half-open bearing hole. When it extends and retracts, it drives the movable probe 3 to move axially and causes the slider 43 to slide on the guide rail 42, thus guiding the movement of the movable probe 3. This ensures that the movable probe 3 moves axially and abuts against the end face of the half-open bearing hole on the other side of the housing, achieving automatic movement and guidance of the movable probe 3 and avoiding manual adjustment.

[0018] The movable probe 3 has a connecting frame 31 fixed to its inner end, parallel to the guide rail 42. The free end of the connecting frame 31 is connected to the telescopic end of the cylinder 41, and the slider 43 is fixed on the connecting frame 31. The connection between the connecting frame 31 and the cylinder 41 allows the movable probe 3 to move when the cylinder 41 extends or retracts, enabling the measurement of the hole spacing of semi-open bearing holes of various specifications and sizes, thus offering high practicality.

[0019] The displacement sensor 5 is arranged parallel to the cylinder 41 below and is mounted between the bracket 1 and the connecting frame 31. The displacement sensor 5 is a linear displacement sensor to accurately measure the displacement of the moving probe. The displacement sensor 5 is mounted between the bracket 1 and the connecting frame 21, which is conducive to accurate measurement and does not occupy the lateral space of the bracket 1, making the entire tooling structure compact.

[0020] The bracket 1 has a gripping handle 11 fixed to its top. The gripping handle 11 facilitates the gripping and movement of the tooling, making it easy to move the tooling to different test housings, thus further improving its practicality.

[0021] The technical solutions of the embodiments of this utility model have been fully described above with reference to the accompanying drawings. It should be noted that the described embodiments are only a part of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

Claims

1. A hole distance measuring tool for half-open bearing holes of a gearbox housing, which is supported on two axially aligned half-open bearing holes of the housing of the gearbox, comprising a support, a fixed measuring head fixed at one end of the support and matched with one half-open bearing hole of one side of the housing, and a moving measuring head matched with the other half-open bearing hole of the other side of the housing, characterized in that: The support is provided with a pneumatic guiding assembly for driving the moving measuring head to move along the axial direction and a displacement sensor connected with the upper computer and located below the pneumatic guiding assembly. The fixed measuring head abuts against the end face of the half-open bearing hole on one side of the shell, and the moving measuring head abuts against the end face of the half-open bearing hole on the other side of the shell. ​ 2. The gear box housing half bearing bore hole pitch measuring tool of claim 1, wherein: The pneumatic guiding assembly comprises a cylinder connected with the moving measuring head and arranged below the support along the half-open bearing hole, a guide rail parallel to the cylinder and arranged on the support, and a sliding block arranged on the guide rail in a guiding and matching mode, and the sliding block is fixed with the moving measuring head and moves on the guide rail along with the expansion and contraction of the cylinder.

3. The gear box housing half bearing bore hole pitch measuring tool of claim 2, wherein: The inner end of the moving measuring head is fixed with a connecting frame parallel to the guide rail, and the free end of the connecting frame is connected with the expansion end of the cylinder, and the sliding block is fixed on the connecting frame.

4. The gear box housing half bearing bore hole pitch measuring tool of claim 3, wherein: The displacement sensor is arranged below the cylinder in parallel and between the support and the connecting frame.

5. The gear case half-bore hole pitch measuring tool of claim 1, wherein: The top of the support is fixed with a gripping handle.

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