Automatic measuring instrument for inner diameter of small raceway of water pump bearing outer ring

Abstract

The utility model discloses an automatic measuring instrument for the inner diameter of a small raceway of a water pump bearing outer ring, and belongs to the technical field of bearing measurement. The automatic measuring instrument for the inner diameter of the small raceway of the outer ring of the water pump bearing is characterized in that the axis is vertically arranged when the bearing is measured, the automatic measuring instrument comprises a driving unit and a measuring assembly located above the bearing, and the driving unit drives the measuring assembly to move along the vertical direction; the measuring assembly comprises a tapered pressing block, a small raceway measuring head, an outer ring positioning sleeve used for positioning a bearing outer ring and a measuring unit which are sequentially arranged from top to bottom, the driving unit is in transmission connection with the tapered pressing block, the driving unit drives the tapered pressing block to move in the vertical direction, the tapered pressing block is movably connected with the outer ring positioning sleeve, and the measuring unit is connected with the small raceway measuring head. The small raceway measuring head is arranged between the tapered pressing block and the outer ring positioning sleeve, the tapered pressing block moves downwards to drive the small raceway measuring head to generate elastic deformation, the measuring end of the measuring unit is in contact with the small raceway measuring head, and the inner diameter of the small raceway is detected by detecting the elastic deformation of the small raceway measuring head.

Description

Technical Field

[0001] The utility model relates to the technical field of bearing measurement, in particular to an automatic measuring instrument for the inner diameter of a small raceway of an outer ring of a water pump bearing. Background Art

[0002] In modern industrial manufacturing, water pump shaft bearings are key components, and their quality directly impacts the performance and lifespan of the entire machine. Stringent requirements are placed on the dimensional accuracy of the small raceway on the outer ring of water pump bearings. However, in existing production processes, measuring the inner diameter of the small raceway on the outer ring of water pump bearings often relies on manual labor. While this method offers a certain degree of measurement accuracy, since production lines typically operate in a continuous processing mode, sampling inspection is often the only option to ensure overall production efficiency.

[0003] The main drawback of manual measurement is that it is significantly limited by the stability of the machine tool. This means that each measurement requires the operator to adjust the equipment according to the actual situation. This not only increases the operator's workload but also makes it difficult to ensure the consistency and accuracy of each measurement. In addition, since the inspection is based on spot checks rather than full inspection, some products that do not meet the drawing requirements may be passed to the next process, which in turn affects the quality and reliability of the final product.

[0004] Therefore, it is particularly important to develop an instrument that can automatically measure the inner diameter of the bearing ring's minor raceway online and promptly determine whether its dimensions meet the drawing requirements. Such a device can not only significantly reduce the operator's labor intensity and improve the accuracy and efficiency of detection, but also effectively avoid quality problems caused by missed inspections, thereby further improving product competitiveness and the company's economic benefits. Utility Model Content

[0005] The purpose of the utility model is to provide an automatic measuring instrument for the inner diameter of the small raceway of the outer ring of a water pump bearing, so as to solve the technical problems mentioned in the above background technology.

[0006] The technical solution for achieving the purpose of this utility model is:

[0007] An automatic measuring instrument for the inner diameter of the small raceway of the outer ring of a water pump bearing. When measuring the bearing, the axis is placed vertically. The instrument comprises a driving unit and a measuring assembly located above the bearing. The driving unit drives the measuring assembly to move in a vertical direction. The measuring assembly comprises a tapered pressure block, a small raceway measuring head, an outer race locating sleeve for locating the outer ring of the bearing, and a measuring unit, which are arranged in sequence from top to bottom. The driving unit is in transmission connection with the tapered pressure block. The driving unit drives the tapered pressure block to move in a vertical direction. The tapered pressure block is movably connected to the outer race locating sleeve. The small raceway measuring head is arranged between the tapered pressure block and the outer race locating sleeve. The downward movement of the tapered pressure block drives the small raceway measuring head to undergo elastic deformation. The measuring end of the measuring unit contacts the small raceway measuring head, and the elastic deformation of the small raceway measuring head is detected to detect the inner diameter size of the small raceway of the outer ring of the bearing.

[0008] The utility model provides an automatic measuring instrument for the inner diameter of the small raceway of the outer ring of a water pump bearing, comprising a driving unit, a taper pressing block, a small raceway measuring head, an outer race positioning sleeve and a measuring unit. The specific working process is as follows: the driving unit drives the taper pressing block, the small raceway measuring head and the outer race positioning sleeve to move downward, so that the outer race positioning sleeve accurately positions the outer ring of the bearing. Then, the driving unit continues to drive the taper pressing block downward to cause the small raceway measuring head to produce elastic deformation. At this time, the measuring unit detects the elastic deformation of the small raceway measuring head to determine the inner diameter size of the small raceway of the outer ring of the bearing. Through this process, the automatic measurement of the inner diameter of the small raceway of the outer ring of the water pump bearing is realized, which can significantly reduce the labor intensity of the operating workers, improve the accuracy and efficiency of the detection, and effectively avoid quality problems caused by missed detection.

[0009] Furthermore, a second through hole is provided inside the small raceway measuring head, and a second conical surface is provided on the inner circumferential surface of the second through hole; the tapered pressure block includes a pressure block part that is transmission-connected to the driving unit and a first sleeve fixedly connected to the bottom of the pressure block part, and the driving unit drives the tapered pressure block to move in the vertical direction by driving the pressure block part. An annular convex portion is provided at the bottom of the first sleeve, and the outer circumferential surface of the annular convex portion is a first conical surface. The first sleeve extends coaxially downward into the second through hole, and the first conical surface is in contact with the second conical surface.

[0010] The utility model inserts a first sleeve with a tapered pressure block into the second through hole of the small raceway measuring head, and utilizes the first tapered surface on the first sleeve to fit with the second tapered surface in the second through hole. When the tapered pressure block applies downward pressure, the first tapered surface moves downward along the second tapered surface and applies an outward opening force to the inner circumference of the second through hole, thereby causing the small raceway measuring head to undergo elastic deformation. This design makes the measurement process more accurate and can effectively detect the inner diameter size of the small raceway of the bearing outer ring.

[0011] Furthermore, a third through hole and a fourth through hole are provided inside the outer ring positioning sleeve from top to bottom, the third through hole is coaxially connected to the fourth through hole, the diameter of the third through hole is smaller than the diameter of the fourth through hole, and the outer ring positioning sleeve is coaxially sleeved on the outer ring of the bearing through the fourth through hole to position and fix the outer ring of the bearing.

[0012] Furthermore, the small raceway measuring head includes a flange and a second sleeve. The interiors of the flange and the second sleeve are both hollow. The second sleeve is coaxially fixed to the bottom of the flange. A second through hole is formed inside the small raceway measuring head. The second sleeve coaxially penetrates into the third through hole and is connected to the inner circumferential surface of the third through hole through a connecting unit. The lower end surface of the flange contacts the upper end surface of the outer ring positioning sleeve, and a gap is left between the third through hole and the second sleeve.

[0013] The second sleeve of the small raceway measuring head of the utility model coaxially penetrates the third through hole of the outer ring positioning sleeve, and a certain gap is left between the third through hole and the second sleeve. This design provides the necessary space for the second sleeve to expand outward after being subjected to force, ensuring that the small raceway measuring head can accurately produce elastic deformation during the measurement process, thereby realizing accurate measurement of the inner diameter of the small raceway of the bearing outer ring.

[0014] Furthermore, the second sleeve is provided with a plurality of slots parallel to the central axis of the second sleeve along the circumferential direction, and an opening is provided at one end of the slot away from the flange.

[0015] The second sleeve of the utility model is provided with a plurality of slits parallel to its central axis along the circumferential direction, and an opening is provided at one end of these slits away from the flange. When the second sleeve is expanded outward by an external force, these slits can release stress, effectively preventing the second sleeve from being permanently deformed or broken due to excessive force, thereby ensuring the reliability and repeatability of the small raceway measuring head during use.

[0016] Furthermore, a buffer unit is provided between the upper end surface of the flange and the lower end surface of the tapered pressing block.

[0017] A buffer unit is provided between the upper end surface of the flange and the lower end surface of the tapered pressure block of the utility model. This design can provide a buffering effect when the tapered pressure block is pressed down, effectively preventing damage to the measured bearing due to excessive pressure. At the same time, it also protects the automatic measuring instrument for the inner diameter of the small raceway of the outer ring of the water pump bearing from damage, thereby ensuring the safety of the measurement process and the service life of the equipment.

[0018] Furthermore, the buffer unit includes a spring; a guide rod is provided in the spring.

[0019] The buffer unit of the utility model includes a spring, in which a guide rod is provided, which can prevent the spring from radially deforming when subjected to force and ensure that the spring maintains stable axial movement during the compression process. This not only improves the buffering effect, but also enhances the reliability and measurement accuracy of the entire device.

[0020] Furthermore, the structure of the movably connected tapered pressure block and the outer ring locating sleeve includes a locating pin fixedly mounted on the outer ring locating sleeve and extending radially toward the inside of the locating sleeve, and a first pin hole arranged on the tapered pressure block to match the locating pin, and the locating pin slides up and down along the first pin hole; the small raceway measuring head is provided with a second pin hole matching the locating pin, and the locating pin passes through the second pin hole and is slidably connected to the first pin hole.

[0021] The utility model provides a locating pin on the outer ring locating sleeve, and respectively provides a first pin hole and a second pin hole in the tapered pressure block and the small raceway measuring head. The locating pin passes through the second pin hole and is slidably connected to the first pin hole, thereby movably connecting the tapered pressure block and the outer ring locating sleeve together, and at the same time positioning and fixing the small raceway measuring head between the tapered pressure block and the outer ring locating sleeve. The utility model has a simple structure, and only needs a driving unit to drive the tapered pressure block to move, so that the outer ring locating sleeve and the small raceway measuring head can move together; in addition, the small raceway measuring head can also be positioned and fixed, effectively avoiding measurement data errors caused by movement of the small raceway measuring head during the measurement process.

[0022] Furthermore, the automatic measuring instrument for the inner diameter of the small raceway of the outer ring of the water pump bearing also includes a measuring station; the bearing is located on the measuring station, and the measuring station supports the outer ring of the bearing and makes the shaft core of the bearing vertical.

[0023] The utility model is also provided with a measuring station for vertically fixing the bearing to facilitate the testing of the sample, ensuring the stable position of the bearing during the measurement process, thereby improving the accuracy and reliability of the detection, simplifying the operation process, and making the entire measurement process more efficient and convenient.

[0024] Furthermore, the measuring unit is connected to an external host computer by telecommunication and sends the measurement data to the host computer.

[0025] The measuring unit of the utility model is connected to an external host computer via electrical signals, and can send measurement data to the host computer in real time. After receiving this data, the host computer can automatically determine whether the inner diameter size of the small raceway of the bearing outer ring meets the preset standard, thereby determining whether the product is qualified. This not only improves the degree of automation of measurement, but also greatly improves the efficiency and accuracy of data processing.

[0026] By adopting the above technical solution, the utility model has the following beneficial effects:

[0027] (1) The utility model provides an automatic measuring instrument for the inner diameter of the small raceway of the outer ring of a water pump bearing, comprising a driving unit, a taper pressing block, a small raceway measuring head, an outer race positioning sleeve and a measuring unit. The specific working process is as follows: the driving unit drives the taper pressing block, the small raceway measuring head and the outer race positioning sleeve to move downward, so that the outer race positioning sleeve accurately positions the outer ring of the bearing. Then, the driving unit continues to drive the taper pressing block downward to cause the small raceway measuring head to produce elastic deformation. At this time, the measuring unit detects the elastic deformation of the small raceway measuring head to determine the inner diameter of the small raceway of the outer ring of the bearing. Through this process, the automatic measurement of the inner diameter of the small raceway of the outer ring of the water pump bearing is realized, which can significantly reduce the labor intensity of the operating workers, improve the accuracy and efficiency of the detection, and effectively avoid quality problems caused by missed detection.

[0028] (2) The utility model inserts a first sleeve with a tapered pressure block into the second through hole of the small raceway measuring head, and utilizes the first tapered surface on the first sleeve to fit with the second tapered surface in the second through hole. When the tapered pressure block is pressed downward, the first tapered surface moves downward along the second tapered surface and applies an outward opening force to the inner circumference of the second through hole, thereby causing the small raceway measuring head to undergo elastic deformation. This design makes the measurement process more accurate and can effectively detect the inner diameter size of the small raceway of the bearing outer ring.

[0029] (3) The utility model provides a fourth through hole (2-3-2) in the outer ring positioning sleeve to position and fix the outer ring of the bearing. This structural design ensures the stability of the position of the outer ring of the bearing during the measurement process, thereby improving the accuracy and reliability of the measurement.

[0030] (4) The second sleeve of the small raceway measuring head of the utility model coaxially penetrates the third through hole of the outer ring positioning sleeve, and a certain gap is left between the third through hole and the second sleeve. This design provides the necessary space for the second sleeve to expand outward after being subjected to force, ensuring that the small raceway measuring head can accurately produce elastic deformation during the measurement process, thereby realizing accurate measurement of the inner diameter of the small raceway of the bearing outer ring.

[0031] (5) The second sleeve of the present invention is provided with a plurality of slits parallel to its central axis along the circumferential direction, and an opening is provided at one end of these slits away from the flange. When the second sleeve is expanded outward by an external force, these slits can release stress, effectively preventing the second sleeve from being permanently deformed or broken due to excessive force, thereby ensuring the reliability and repeatability of the small raceway measuring head during use.

[0032] (6) A buffer unit is provided between the upper end face of the flange and the lower end face of the tapered pressure block of the utility model, which can provide a buffering effect when the tapered pressure block is pressed down, effectively preventing the measured bearing from being damaged due to excessive pressure, and at the same time protecting the automatic measuring instrument for the inner diameter of the small raceway of the outer ring of the water pump bearing from damage, thereby ensuring the safety of the measurement process and the service life of the equipment.

[0033] (7) The buffer unit of the present invention includes a spring, and a guide rod is provided in the spring to prevent the spring from undergoing radial deformation when subjected to force, thereby ensuring that the spring maintains stable axial movement during the compression process. This not only improves the buffering effect, but also enhances the reliability and measurement accuracy of the entire device.

[0034] (8) The utility model provides a locating pin on the outer ring locating sleeve, and respectively provides a first pin hole and a second pin hole in the tapered pressure block and the small raceway measuring head. The locating pin passes through the second pin hole and is slidably connected to the first pin hole, thereby movably connecting the tapered pressure block and the outer ring locating sleeve together, and at the same time positioning and fixing the small raceway measuring head between the tapered pressure block and the outer ring locating sleeve. The structure is simple, and only the driving unit is required to drive the tapered pressure block to move, so that the outer ring locating sleeve and the small raceway measuring head can move together; in addition, the small raceway measuring head can also be positioned and fixed, effectively avoiding the measurement data error caused by the movement of the small raceway measuring head during the measurement process.

[0035] (9) The present invention is also provided with a measuring station for vertically fixing the bearing to facilitate the testing of the sample, ensuring the stability of the position of the bearing during the measurement process, thereby improving the accuracy and reliability of the test, simplifying the operation process, and making the entire measurement process more efficient and convenient.

[0036] (10) The measuring unit of the present invention is connected to an external host computer through electrical signals, and can send measurement data to the host computer in real time. After receiving this data, the host computer can automatically determine whether the inner diameter size of the small raceway of the bearing outer ring meets the preset standard, thereby determining whether the product is qualified. This not only improves the degree of measurement automation, but also greatly improves the efficiency and accuracy of data processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings, wherein

[0038] Figure 1 This is a schematic cross-sectional view of an automatic measuring instrument for the inner diameter of the small raceway of the outer ring of a water pump bearing according to an embodiment of the present invention;

[0039] Figure 2 This is an isometric structural diagram of a tapered pressing block according to an embodiment of the present invention;

[0040] Figure 3 This is a front view of a tapered pressing block according to an embodiment of the present invention;

[0041] Figure 4 for Figure 3 Cross-sectional view of the BB surface;

[0042] Figure 5 It is a schematic diagram of the cross-sectional structure of the connection state of the tapered pressing block and the small raceway measuring head;

[0043] Figure 6 This is an isometric structural diagram of a small raceway measuring head according to an embodiment of the present invention;

[0044] Figure 7 A top view of a small raceway measuring head according to an embodiment of the present invention;

[0045] Figure 8 for Figure 7 The cross-sectional view of the AA surface;

[0046] Figure 9 This is a cross-sectional structural diagram of an outer ring positioning sleeve according to an embodiment of the present invention;

[0047] Figure 10 This is a schematic diagram of the cross-sectional structure of the connection between the small raceway measuring head and the outer ring locating sleeve.

[0048] The numbers in the accompanying drawings are: drive unit 1, measuring assembly 2, tapered pressure block 2-1, pressure block part 2-1-1, first sleeve 2-1-2, annular convex portion 2-1-2-1, first conical surface 2-1-2-1-1, first pin hole 2-1-3, small raceway measuring head 2-2, flange 2-2-1, second sleeve 2-2-2, second conical surface 2-2-3, second pin hole 2-2-4, outer ring locating sleeve 2-3, third through hole 2-3-1, fourth through hole 2-3-2, locating pin 2-3-3, measuring unit 2-4, spring 2-5, bearing 3, measuring station 4. DETAILED DESCRIPTION

[0049] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0050] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0051] 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 rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0052] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0053] In the description of the embodiments of the present invention, it should be understood that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0054] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "setting", "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The present invention is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the scope of protection of the present invention.

[0055] (Example 1)

[0056] See Figures 1 to 10 An automatic measuring instrument for the inner diameter of the small raceway of the outer ring of a water pump bearing comprises a drive unit 1, a measuring assembly 2, and a measuring station 4 for vertically fixing the bearing. The drive unit 1 drives the measuring assembly 2 to move in a vertical direction. In this embodiment, the drive unit is a cylinder. The measuring station 4 comprises two parallel conveyor belts on the same horizontal plane. The outer ring of the bearing 3 is positioned on the two conveyor belts, and a gap is left between the two conveyor belts for the shaft core of the bearing 3 to pass through. The bearing 3 is placed with its shaft core vertically centered.

[0057] The measuring assembly 2 includes a tapered pressure block 2-1, a small raceway measuring head 2-2, an outer ring positioning sleeve 2-3, a measuring unit 2-4, and a spring 2-5. The cylinder is transmission-connected to the tapered pressure block 2-1, and the driving unit 1 drives the tapered pressure block 2-1 to move in the vertical direction.

[0058] A third through hole 2-3-1 and a fourth through hole 2-3-2 are provided inside the outer ring locating sleeve 2-3 from top to bottom. The third through hole 2-3-1 is coaxially connected to the fourth through hole 2-3-2. The diameter of the third through hole 2-3-1 is smaller than the diameter of the fourth through hole 2-3-2. The fourth through hole 2-3-2 matches the outer ring of the bearing. The outer ring locating sleeve can be coaxially sleeved on the outer ring of the bearing through the fourth through hole 2-3-2 to position and fix the outer ring of the bearing. A locating pin 2-3-3 is fixedly installed on the outer ring locating sleeve 2-3, and the locating pin 2-3-3 extends radially toward the inside of the locating sleeve.

[0059] A second through hole is provided inside the small raceway measuring head 2-2, and the small raceway measuring head 2-2 includes a flange 2-2-1 and a second sleeve 2-2-2. The interiors of the flange 2-2-1 and the second sleeve 2-2-2 are both hollow, and the second sleeve 2-2-2 is coaxially fixed to the bottom of the flange 2-2-1. A second through hole is formed inside the small raceway measuring head 2-2, and a second conical surface 2-2-3 is provided on the inner circumferential surface of the second through hole. The second sleeve 2-2-2 is provided with a plurality of gaps parallel to the central axis of the second sleeve along the circumferential direction, and an opening is provided at the end of the gap away from the flange; a first pin hole 2-1-3 and a second pin hole 2-2-4 are respectively provided in the tapered pressure block and the small raceway measuring head.

[0060] The tapered pressure block 2-1 includes a pressure block part 2-1-1 connected to the cylinder transmission and a first sleeve 2-1-2 fixedly connected to the bottom of the pressure block part 2-1-1. The bottom of the first sleeve 2-1-2 is provided with an annular convex part 2-1-2-1, and the outer peripheral surface of the annular convex part is the first conical surface 2-1-2-1-1.

[0061] Among them, the first sleeve 2-1-2 with the tapered pressure block 2-1 coaxially extends downward into the second through hole of the small raceway measuring head 2-2, and the first tapered surface 2-1-2-1-1 can fit the second tapered surface 2-2-3; the second sleeve 2-2-2 of the small raceway measuring head 2-2 coaxially penetrates into the third through hole 2-3-1 of the outer ring locating sleeve 2-3, until the lower end surface of the flange 2-2-1 of the small raceway measuring head 2-2 contacts the upper end surface of the outer ring locating sleeve, and a gap is left between the third through hole and the second sleeve. Then the locating pin 2-3-3 of the outer ring locating sleeve 2-3 passes through the second pin hole 2-2-4 and is slidably connected to the first pin hole 2-1-3, and the locating pin 2-3-3 slides up and down along the first pin hole 2-1-3, so that the tapered pressure block and the outer ring locating sleeve are movably connected together, and at the same time, the small raceway measuring head is positioned and fixed between the tapered pressure block and the outer ring locating sleeve.

[0062] The measuring unit 2-4 and the spring 2-5 are arranged between the upper end surface of the flange 2-2-1 and the lower end surface of the tapered pressure block 2-1. A guide rod is provided in the spring to prevent the spring from radially deforming when subjected to force, ensuring that the spring maintains stable axial movement during compression. The guide rod is movably arranged between the upper end surface of the flange 2-2-1 and the lower end surface of the tapered pressure block 2-1. The measuring end of the measuring unit 2-4 contacts the small raceway measuring head 2-2, and detects the elastic deformation of the small raceway measuring head 2-2 to detect the inner diameter size of the small raceway of the bearing outer ring. The measuring unit 2-4 is electrically connected to an external host computer and sends the measurement data to the host computer.

[0063] For ease of understanding, combined with the above embodiments, the specific working process of the automatic measuring instrument for the inner diameter of the small raceway of the outer ring of the water pump bearing is as follows:

[0064] The bearing is conveyed to the measuring station 4 via the conveyor belt. At this time, the spring is in a relaxed state and the sensor is in its original position, which is zero position. Then the driving unit drives the tapered pressure block to move downward, together with the outer ring locating sleeve and the small raceway measuring head. The outer ring locating sleeve is set on the outer ring of the bearing. Since the bearing is against the bottom of the outer ring locating sleeve, the outer ring locating sleeve no longer moves downward, and the small raceway measuring head stops moving. The tapered pressure block continues to press down, and the annular convex part of the tapered pressure block moves downward against the second cone surface. The first sleeve squeezes the second The measuring head of the small raceway of the sleeve undergoes elastic deformation, causing the second sleeve to be forced to open outward, and the outer edge of the corresponding flange to open upward in the vertical direction. During this period, the spring contraction sensor data changes. When the outer peripheral surface of the bottom of the second sleeve contacts the small raceway of the outer ring, the tapered pressure block can no longer move downward, and the outer edge of the flange no longer continues to open upward in the vertical direction. A certain distance is formed between the lower end face of the flange and the upper end face of the outer ring locating sleeve. At this time, the sensor data stops changing, and the measured data ① is the distance from the measuring head to the small raceway of the outer ring.

[0065] After the measurement is completed, the driving unit drives the tapered pressure block to move upward, and the annular convex part of the tapered pressure block moves upward against the second conical surface. The external force applied to the second sleeve is slowly removed, and the second sleeve returns to its original position from the open state. The second conical surface continues to move upward, and the outer ring locating sleeve and the small raceway measuring head move upward together. At this time, the spring returns to the relaxed state, and the sensor also returns to its original position, which is zero position, waiting for the next measurement.

[0066] At the same time, a limit sample M with a lower difference in the outer ring small raceway size and a limit sample N with an upper difference in the size are made. According to the above method, the degree of sensor change of the two limit samples is measured respectively, and they are data I and data II.

[0067] If: data I < data ① < data II, then the outer ring small raceway size of the bearing is determined to be qualified; if data ① < data I, then the outer ring small raceway size of the bearing is determined to be too small; if data ① > data II, then the outer ring small raceway size of the bearing is determined to be too large.

[0068] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An automatic measuring instrument for the inner diameter of the small raceway of the outer ring of a water pump bearing, wherein the axis of the bearing (3) is placed vertically during measurement, and is characterized in that: The invention comprises a driving unit (1) and a measuring assembly (2) located above a bearing (3), wherein the driving unit (1) drives the measuring assembly (2) to move in a vertical direction; the measuring assembly (2) comprises a tapered pressure block (2-1) and an outer ring positioning sleeve (2-3) movably connected together from top and bottom, a small raceway measuring head (2-2) arranged between the tapered pressure block (2-1) and the outer ring positioning sleeve (2-3), and a measuring unit (2-4); the tapered pressure block moves downward to drive the small raceway measuring head (2-2) to undergo elastic deformation, and the measuring end of the measuring unit (2-4) contacts the small raceway measuring head (2-2), and detects the elastic deformation of the small raceway measuring head (2-2) to detect the inner diameter size of the small raceway of the bearing outer ring.

2. The automatic measuring instrument for the inner diameter of the small raceway of the outer ring of a water pump bearing according to claim 1 is characterized in that: A second through hole is provided inside the small raceway measuring head (2-2), and a second conical surface (2-2-3) is provided on the inner circumference of the second through hole; the tapered pressure block (2-1) comprises a pressure block portion (2-1-1) connected to the drive unit (1) in a transmission manner and a first sleeve (2-1-2) fixedly connected to the bottom of the pressure block portion (2-1-1); an annular convex portion (2-1-2-1) is provided at the bottom of the first sleeve (2-1-2); the outer circumference of the annular convex portion is the first conical surface (2-1-2-1-1); the first sleeve (2-1-2) coaxially extends downward into the second through hole, and the first conical surface (2-1-2-1-1) is in contact with the second conical surface (2-2-3).

3. The automatic measuring instrument for the inner diameter of the small raceway of the outer ring of a water pump bearing according to claim 1, characterized in that: A third through hole (2-3-1) and a fourth through hole (2-3-2) are provided inside the outer ring positioning sleeve (2-3) from top to bottom. The third through hole (2-3-1) and the fourth through hole (2-3-2) are coaxially connected. The diameter of the third through hole (2-3-1) is smaller than the diameter of the fourth through hole (2-3-2). The outer ring positioning sleeve is coaxially sleeved on the outer ring of the bearing through the fourth through hole (2-3-2) to position and fix the outer ring of the bearing.

4. The automatic measuring instrument for the inner diameter of the small raceway of the outer ring of a water pump bearing according to claim 3 is characterized in that: The small raceway measuring head (2-2) comprises a flange (2-2-1) and a second sleeve (2-2-2). The interiors of the flange (2-2-1) and the second sleeve (2-2-2) are both hollow. The second sleeve (2-2-2) is coaxially fixed to the bottom of the flange (2-2-1). A second through hole is formed inside the small raceway measuring head (2-2). The second sleeve (2-2-2) coaxially penetrates into the third through hole (2-3-1) and is connected to the inner circumference of the third through hole (2-3-1) through a connecting unit. The lower end surface of the flange (2-2-1) contacts the upper end surface of the outer ring positioning sleeve, and a gap is left between the third through hole and the second sleeve.

5. The automatic measuring instrument for the inner diameter of the small raceway of the outer ring of a water pump bearing according to claim 4, characterized in that: The second sleeve (2-2-2) is provided with a plurality of slits parallel to the central axis of the second sleeve along the circumferential direction, and an opening is provided at one end of the slit away from the flange.

6. The automatic measuring instrument for the inner diameter of the small raceway of the outer ring of a water pump bearing according to claim 4, characterized in that: A buffer unit is provided between the upper end surface of the flange (2-2-1) and the lower end surface of the tapered pressing block (2-1).

7. The automatic measuring instrument for the inner diameter of the small raceway of the outer ring of a water pump bearing according to claim 6, characterized in that: The buffer unit comprises a spring (2-5); a guide rod is provided in the spring (2-5).

8. The automatic measuring instrument for the inner diameter of the small raceway of the outer ring of a water pump bearing according to claim 1, characterized in that: The structure for the movable connection between the tapered pressure block (2-1) and the outer ring positioning sleeve (2-3) comprises a positioning pin fixedly mounted on the outer ring positioning sleeve (2-3) and extending radially toward the interior of the positioning sleeve, and a first pin hole provided on the tapered pressure block (2-1) and matching the positioning pin, wherein the positioning pin slides up and down along the first pin hole; and the small raceway measuring head (2-2) is provided with a second pin hole matching the positioning pin, wherein the positioning pin passes through the second pin hole and is slidably connected to the first pin hole.

9. The automatic measuring instrument for the inner diameter of the small raceway of the outer ring of a water pump bearing according to claim 1, characterized in that: The automatic measuring instrument for the inner diameter of the small raceway of the outer ring of the water pump bearing further comprises a measuring station (4); the bearing (3) is located on the measuring station (4), and the measuring station (4) supports the outer ring of the bearing (3) and allows the shaft core of the bearing (3) to be vertical, thereby fixing the bearing and facilitating the detection of the sample.

10. The automatic measuring instrument for the inner diameter of the small raceway of the outer ring of a water pump bearing according to claim 1, characterized in that: The measuring unit (2-4) is connected to an external host computer by telecommunication, and sends the measured data to the host computer, which can then judge whether the data is qualified.

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