A center line to bottom surface perpendicular distance gauge for a reducer housing bearing hole

Abstract

The application discloses a center line to inner hole bottom surface vertical distance gauge for a reducer shell bearing hole, which comprises a base unit, a calibration unit, an auxiliary unit and a measuring unit; the measuring unit comprises a measuring table and a table seat for mounting the measuring table; the calibration unit comprises a calibration piece arranged on the plane of the base unit, and the height of the calibration piece is designed as the standard vertical distance between the lowest point of the bearing hole and the inner hole bottom surface minus the radius of the bearing hole; the auxiliary unit comprises an auxiliary base, and the calibration part of the auxiliary base is tightly attached to the plane of the base unit; the table seat is arranged on the auxiliary base; the mechanical reference conversion of the calibration piece and the auxiliary base converts the complex three-dimensional space measurement into simple height difference comparison, the single measurement time is greatly shortened, the efficiency is improved compared with the traditional three-coordinate measurement, the cost of the gauge is reduced, the enterprise cost is significantly reduced, and the operation is simple, so that workers can quickly and simply start and complete standardized detection.

Description

Technical Field

[0001] This application belongs to the field of measurement, and particularly relates to a gauge for measuring the vertical distance from the center line of the bearing hole of a reducer housing to the bottom surface of the inner hole. Background Technology

[0002] In the field of mechanical transmission, speed reducers, as a key transmission device, are widely used in various mechanical equipment. Their performance plays a crucial role in the operational stability, efficiency, and lifespan of the entire mechanical system. The speed reducer housing, as an important component of the speed reducer, provides support and protection for internal transmission components such as gears. Its design precision and manufacturing quality directly affect the overall performance of the speed reducer. In the design of the speed reducer housing, the vertical distance or projected distance from the centerline of the two bearing holes to the bottom surface of the inner hole is a critical control dimension. This dimension is closely related to the gear clearance, and the size of the gear clearance has a direct and significant impact on the assembly accuracy, transmission performance, and service life of the speed reducer.

[0003] When the gear clearance is too large, significant relative displacement and impact forces will occur between the gears during reducer operation. This not only leads to poor gear meshing, causing vibration and noise during transmission and reducing transmission efficiency, but also accelerates gear wear, shortens gear lifespan, and consequently affects the reliability and stability of the entire reducer. Conversely, if the gear clearance is too small, the gears will squeeze against each other due to thermal expansion and other factors during operation, increasing friction and potentially causing gear jamming. This not only increases reducer energy consumption and transmission efficiency but also causes serious damage to the gears and reducer housing, severely impacting the normal operation and service life of the reducer. Therefore, to ensure the assembly accuracy, transmission performance, and service life of the reducer, the critical dimension of the vertical distance or projected distance from the center line of the two bearing holes to the bottom surface of the inner hole must be accurately measured during the manufacturing process of the reducer housing. Currently, the industry commonly uses coordinate measuring machines (CMMs) to obtain the value of this critical dimension. Coordinate measuring machines (CMMs) require specialized instruments, which offer high accuracy but are prohibitively expensive, representing a significant financial investment for many small and medium-sized enterprises (SMEs). Furthermore, operating CMMs is complex, requiring skilled technicians, and measuring a single workpiece often takes considerable time, resulting in low efficiency. In large-scale production, this inefficient method severely impacts production schedules, reduces productivity, and fails to meet the demands for rapid and efficient manufacturing. Therefore, existing technologies require further improvement and enhancement. Utility Model Content

[0004] This utility model provides a gauge for measuring the vertical distance from the center line of the bearing hole of a reducer housing to the bottom surface of the inner hole. It is used to solve the problems of high cost and low efficiency of existing three-coordinate measuring machines for measuring the vertical distance or projected distance from the center line of the two bearing holes of a reducer housing to the bottom surface of the inner hole.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A gauge for measuring the vertical distance from the center line of the bearing hole in a reducer housing to the bottom surface of the inner hole.

[0007] It includes a base unit, a calibration unit, an auxiliary unit, and a measurement unit;

[0008] The measuring unit includes a measuring instrument and a mounting base for mounting the measuring instrument;

[0009] The calibration unit includes a calibration component, which is disposed on the plane of the base unit. The height of the calibration component is designed to be the standard vertical distance between the lowest point of the bearing hole and the bottom surface of the inner hole minus the radius of the bearing hole.

[0010] The auxiliary unit includes an auxiliary base with a reference part. During zeroing, the reference part of the auxiliary base abuts against the plane of the base unit, the meter holder is placed on the auxiliary base, and the meter head contacts the end face of the calibration component. The measured value is the reference value, which is used to zero the meter. During measurement, the reference part of the auxiliary base abuts against the bottom surface of the inner hole of the reducer housing, the meter holder is placed on the auxiliary base, and the meter head contacts the lowest point of the bearing hole. The measured value is the actual value. The actual value and the reference value are compared and calculated to achieve rapid distance measurement.

[0011] The above structure transforms complex three-dimensional spatial measurement into simple height difference comparison by converting the mechanical reference between the calibration component and the auxiliary base. This greatly shortens the measurement time for a single component, improves efficiency compared to traditional coordinate measuring machines, and reduces the cost of inspection tools, thus significantly reducing enterprise costs. Furthermore, the operation is simple, allowing workers to quickly and easily learn and complete standardized inspections.

[0012] In a preferred implementation, the auxiliary base includes an auxiliary plate, and the table base is disposed on the plane of the auxiliary plate.

[0013] The auxiliary plate provides a highly flat reference surface for the gauge base, ensuring that the gauge base remains level and wobble-free when placed on it, thereby effectively eliminating measurement errors caused by tilting or wobbling of the gauge base.

[0014] In a preferred implementation, the base is connected to the auxiliary plate by magnetic attraction.

[0015] In a preferred embodiment, an auxiliary plate is connected to a base, and a positioning rod is provided on the lower side of the base. The positioning rod can be inserted into the inner hole of the reducer housing. The upper diameter of the positioning rod is larger than the lower diameter, forming a stepped surface. The reference part is provided on the stepped surface, and the stepped surface contacts the bottom surface of the inner hole.

[0016] In a preferred implementation, the base unit is provided with a process hole, the diameter of which is adapted to the lower diameter of the positioning rod. When the lower part of the positioning rod is inserted into the process hole, the stepped surface contacts the plane of the base unit.

[0017] The lower diameter of the positioning rod precisely matches the inner diameter of the reducer housing, forming a clearance-free fit after insertion. The lower part of the positioning rod also adapts to the process hole of the base unit. After insertion, the inner hole datum is transferred to the fixture itself through the contact between the stepped surface and the base plane. The stepped surface serves as a common datum surface, acting as both the contact surface between the positioning rod and the base, and the contact surface with the bottom surface of the inner hole. By designing the stepped surface diameter to match the effective contact area of ​​the inner hole bottom surface, it is ensured that the contact state with the datum surface is identical regardless of whether the positioning rod is inserted into the inner hole or the process hole, thereby eliminating errors introduced by differences in the datum surface.

[0018] In a preferred implementation, the base unit is provided with legs, the height of which is greater than the lower length of the positioning rod.

[0019] In a preferred implementation, the meter holder includes a support platform and an L-shaped meter frame on the support platform, with the meter mounted on the L-shaped meter frame.

[0020] In a preferred implementation, the L-shaped frame is detachably connected to the support platform.

[0021] In the preferred implementation, the L-shaped frame can rotate relative to the support platform.

[0022] In a preferred implementation, the measuring instrument is a dial indicator or a percentage indicator. Attached Figure Description

[0023] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain this application and do not constitute an undue limitation of the present invention. In the drawings:

[0024] Figure 1 A schematic three-dimensional structural diagram of one embodiment of the inspection tool of this application is shown;

[0025] Figure 2 A schematic three-dimensional structural diagram of the inspection tool of this application is shown from another perspective.

[0026] Figure 3 A schematic three-dimensional structural diagram of an auxiliary unit of this application is shown;

[0027] Figure 4 A schematic three-dimensional structural diagram of the inspection tool used in this application for a reducer housing is shown;

[0028] Figure 5 A schematic internal structure diagram of the inspection tool used in this application for a reducer housing is shown;

[0029] Label Explanation:

[0030] 1. Base unit; 10. Process hole; 11. Support leg; 2. Calibration unit; 3. Auxiliary unit; 30. Auxiliary plate; 31. Base; 32. Positioning rod; 320. Step surface; 4. Measuring unit; 40. Measuring gauge; 41. Gauge holder; 410. Support platform; 411. L-shaped gauge holder; 5. Reducer housing; 50. Bottom surface of inner hole; 51. Bearing hole. Detailed Implementation

[0031] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit and scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0032] In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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. In this utility model, unless otherwise expressly specified and limited, the first feature being "upper" or "lower" than the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium.

[0033] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral unit; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. However, specifying a direct connection indicates that the two main bodies at the connection point are not connected by an intermediate structure, but are simply connected to form a whole through a connecting structure. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0034] In this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature.

[0035] The present invention will now be described with reference to the accompanying drawings.

[0036] The specific solution adopted is as follows:

[0037] like Figure 1-5 As shown, this utility model provides a gauge for measuring the vertical distance from the center line of the bearing hole in a reducer housing to the bottom surface of the inner hole.

[0038] It includes a base unit 1, a calibration unit 2, an auxiliary unit 3, and a measurement unit 4;

[0039] The measuring unit 4 includes a measuring gauge 40 and a measuring base 41 for mounting the measuring gauge 40;

[0040] The calibration unit 2 includes a calibration component, which is disposed on the plane of the base unit 1. The height of the calibration component is designed to be the standard vertical distance between the lowest point of the bearing hole 51 and the bottom surface 50 of the inner hole minus the radius of the bearing hole 51.

[0041] The auxiliary unit 3 includes an auxiliary base with a reference part. During zeroing, the reference part of the auxiliary base abuts against the plane of the base unit 1, the gauge base 41 is placed on the auxiliary base, and the meter head of the measuring instrument 40 contacts the end face of the calibration component. The measured value at this time is the comparison value, which is used to zero the measuring instrument 40. During measurement, the reference part of the auxiliary base abuts against the bottom surface 50 of the inner hole of the reducer housing 5, the gauge base 41 is placed on the auxiliary base, and the meter head of the measuring instrument 40 contacts the lowest point of the bearing hole 51. The measured value at this time is the actual value. The actual value and the comparison value are compared and calculated to achieve rapid distance measurement.

[0042] In the specific measurement steps, the reference part of the auxiliary base is pressed tightly against the plane of the base unit 1, and the gauge base 41 is placed on the auxiliary base. The gauge head of the gauge 40 is adjusted to contact the end face of the calibration part, and the reading of the gauge 40 is recorded. If the reading is not zero, it is zeroed by using the fine-tuning knob of the gauge 40. During the actual measurement process, the reducer housing 5 is placed stably in the measurement position, ensuring that the bottom surface 50 of the inner hole is clean and free of foreign objects. The reference part of the auxiliary base is pressed tightly against the bottom surface 50 of the inner hole, and the gauge base 41 is placed on the auxiliary base. The gauge head of the gauge 40 is moved to contact the lowest point of the bearing hole 51, and the reading of the gauge 40 (actual value ΔH) is recorded. The actual vertical distance is calculated according to the formula: actual distance = 0 + ΔH + R. The calculated result is compared with the tolerance range to determine whether the housing size is qualified.

[0043] By converting the mechanical reference between the calibration part and the auxiliary base, the complex three-dimensional spatial measurement is transformed into a simple height difference comparison, which greatly shortens the measurement time of a single part, improves efficiency compared with traditional coordinate measuring machines, and reduces the cost of inspection tools, thus significantly reducing enterprise costs; moreover, the operation is simple and workers can quickly and easily get started to complete standardized inspection.

[0044] As a preferred embodiment of this application, the auxiliary base includes an auxiliary plate 30, and the table base 41 is disposed on the plane of the auxiliary plate 30.

[0045] The auxiliary plate 30 provides a highly flat reference surface for the gauge base 41, ensuring that the gauge base 41 remains level and undisturbed when placed on it, thereby effectively eliminating measurement errors caused by tilting or shaking of the gauge base 41. The gauge base 41 is placed directly on the plane of the auxiliary plate 30, and the two do not need to be connected or fixed. This allows the operator to easily adjust the position of the gauge head to accurately contact the lowest point of the bearing hole 51, thus improving measurement efficiency.

[0046] Furthermore, considering the stability of the base 41 during measurement, the base 41 is connected to the auxiliary plate 30 by magnetic attraction. The magnetic attraction force firmly fixes the base 41 to the auxiliary plate 30, ensuring that the measuring instrument 40 remains vertical and stable in a static state, thereby improving the stability of the measurement reference. When it is necessary to move the base 41, the operator only needs to apply a slight external force to overcome the magnetic attraction force.

[0047] See Figure 3 An auxiliary plate 30 is connected to a base 31. A positioning rod 32 is provided on the lower side of the base 31. The positioning rod 32 can be inserted into the inner hole of the reducer housing. The upper diameter of the positioning rod 32 is larger than the lower diameter, forming a stepped surface 320. A reference part is provided on the stepped surface 320, and the stepped surface 320 contacts the bottom surface 50 of the inner hole. The base unit 1 is provided with a process hole 10. The diameter of the process hole 10 is adapted to the lower diameter of the positioning rod 32. When the lower part of the positioning rod 32 is inserted into the process hole 10, the stepped surface 320 contacts the plane of the base unit 1.

[0048] The lower diameter of the positioning rod 32 strictly matches the inner hole size of the reducer housing 5, forming a clearance-free fit after insertion. The lower part of the positioning rod 32 also adapts to the process hole 10 of the base unit 1. After insertion, the inner hole reference is transferred to the fixture itself through the contact between the stepped surface 320 and the plane of the base 31. The stepped surface 320 serves as a common reference surface, acting as both the contact surface between the positioning rod 32 and the base 31, and the contact surface with the bottom surface 50 of the inner hole. By designing the diameter of the stepped surface 320 to match the effective contact area of ​​the bottom surface 50 of the inner hole, it is ensured that the contact state with the reference surface is exactly the same regardless of whether the positioning rod 32 is inserted into the inner hole or the process hole 10, thereby eliminating errors introduced by differences in the reference surface.

[0049] Furthermore, the base unit 1 is provided with a support leg 11, the height of which is greater than the lower length of the positioning rod 32. The greater height of the support leg 11 ensures that after the positioning rod 32 is inserted into the process hole 10, there is a safe gap between its lower end and other surfaces below the base 31 (such as the workbench or support structure). By controlling the height of the support leg 11, the stepped surface 320 of the positioning rod 32 can contact the plane of the base 31, thereby ensuring high repeatability of the measurement results.

[0050] See Figure 1 The meter holder 41 includes a support platform 410 and an L-shaped meter bracket 411 on the support platform 410, and the meter 40 is mounted on the L-shaped meter bracket 411. Specifically, the L-shaped meter bracket 411 is detachably connected to the support platform 410, for example, by bolts.

[0051] In addition, the L-shaped gauge holder 411 can be set to rotate relative to the support platform 410, which makes it easy to adjust the position of the gauge 40 and facilitates quick measurement of the two bearing holes 51.

[0052] In a preferred embodiment of this application, the measuring instrument is a dial gauge or a percentage gauge.

[0053] For any parts not mentioned in this utility model, existing technologies can be used or referenced.

[0054] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this utility model, and these should all be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A gauge for measuring the vertical distance from the center line of the bearing hole in a reducer housing to the bottom surface of the inner hole, characterized in that, It includes a base unit, a calibration unit, an auxiliary unit, and a measurement unit; The measuring unit includes a measuring instrument and a mounting base for mounting the measuring instrument; The calibration unit includes a calibration component, which is disposed on the plane of the base unit. The height of the calibration component is designed to be the standard vertical distance between the lowest point of the bearing hole and the bottom surface of the inner hole minus the radius of the bearing hole. The auxiliary unit includes an auxiliary base with a reference part. During zeroing, the reference part of the auxiliary base abuts against the plane of the base unit, the meter holder is placed on the auxiliary base, and the meter head contacts the end face of the calibration component. The measured value is the reference value, which is used to zero the meter. During measurement, the reference part of the auxiliary base abuts against the bottom surface of the inner hole of the reducer housing, the meter holder is placed on the auxiliary base, and the meter head contacts the lowest point of the bearing hole. The measured value is the actual value. The actual value and the reference value are compared and calculated to achieve rapid distance measurement.

2. The gauge for measuring the vertical distance from the center line of the bearing hole in the reducer housing to the bottom surface of the inner hole according to claim 1, characterized in that, The auxiliary base includes an auxiliary plate, and the table base is disposed on the plane of the auxiliary plate.

3. The gauge for measuring the vertical distance from the center line of the bearing hole in the reducer housing to the bottom surface of the inner hole, as described in claim 2, is characterized in that... The base is connected to the auxiliary plate by magnetic attraction.

4. The gauge for measuring the vertical distance from the center line of the bearing hole in the reducer housing to the bottom surface of the inner hole according to claim 2, characterized in that, A base is connected to the auxiliary plate, and a positioning rod is provided on the lower side of the base. The positioning rod can be inserted into the inner hole of the reducer housing. The upper diameter of the positioning rod is larger than the lower diameter, forming a stepped surface. The reference part is located on the stepped surface, and the stepped surface contacts the bottom surface of the inner hole.

5. The gauge for measuring the vertical distance from the center line of the bearing hole in the reducer housing to the bottom surface of the inner hole according to claim 4, characterized in that, The base unit is provided with a process hole, the diameter of which is adapted to the lower diameter of the positioning rod. When the lower part of the positioning rod is inserted into the process hole, the stepped surface contacts the plane of the base unit.

6. The gauge for measuring the vertical distance from the center line of the bearing hole in the reducer housing to the bottom surface of the inner hole according to claim 5, characterized in that, The base unit is equipped with legs, and the height of the legs is greater than the lower length of the positioning rod.

7. The gauge for measuring the vertical distance from the center line of the bearing hole in the reducer housing to the bottom surface of the inner hole according to claim 1, characterized in that, The meter base includes a support platform and an L-shaped meter frame on the support platform, and the meter is installed on the L-shaped meter frame.

8. The gauge for measuring the vertical distance from the center line of the bearing hole in the reducer housing to the bottom surface of the inner hole according to claim 7, characterized in that, The L-shaped display stand and support platform are detachably connected.

9. The gauge for measuring the vertical distance from the center line of the bearing hole in the reducer housing to the bottom surface of the inner hole according to claim 7, characterized in that, The L-shaped stand can rotate relative to the support platform.

10. The gauge for measuring the vertical distance from the center line of the bearing hole in the reducer housing to the bottom surface of the inner hole according to claim 1, characterized in that, The measuring instrument is a dial indicator or a percentage indicator.

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