A pump body form and position tolerance inspection tool

Abstract

This utility model relates to a pump body form and position tolerance inspection fixture, including a positioning mechanism connected to the pump body, a guide shaft coaxially rotatably connected to the pump body through the positioning mechanism, and a detection mechanism connected to the guide shaft. The positioning mechanism includes a positioning plate connected to the guide shaft and used for connecting the guide shaft to the pump body, and a mounting seat sleeved on the guide shaft to limit the axial displacement of the guide shaft. By setting the positioning mechanism, the guide shaft can be connected to the pump body, and the rotation of the guide shaft can be limited laterally and axially to improve the stability of the guide shaft rotation and improve the accuracy of detecting the form and position tolerance of the pump body. The positioning plate has multiple installation steps, so that the fixture can be adapted to different pump body inlet ring diameters. At the same time, the convenient adjustment between the two sets of positioning plates can shorten the installation time of the inspection and improve the inspection efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of pump body testing, and specifically designs a pump body form and position tolerance inspection tool. Background Technology

[0002] The dimensional and positional tolerances of the split-case pump body (such as coaxiality, roundness, and end face runout) directly affect the pump's operating efficiency and lifespan.

[0003] Traditional testing methods, which use general-purpose measuring tools (such as micrometers and dial indicators) combined with manual calibration, have the following drawbacks:

[0004] 1. Unstable positioning reference: Requires repeated adjustment of the fixture based on operational experience, easily introducing human error. 2. Poor adaptability: Different pump body specifications require different special tooling, resulting in low testing efficiency.

[0005] 3. Limited measurement range: Traditional guide rod structures cannot achieve 360° full circumference measurement and require multiple disassembly and assembly.

[0006] 4. Low rotational stability of the test piece: When the drive shaft drives the test piece to rotate coaxially with the pump body, the lack of a limiting structure on the axial direction of the drive shaft causes the axis to move, resulting in data deviations in the rotation of the test piece and affecting the accuracy of the measured values. Utility Model Content

[0007] In order to solve the above-mentioned problems in the existing technology, the purpose of this utility model is to provide a pump body form and position tolerance inspection tool.

[0008] The technical solution adopted by this utility model is as follows: it includes a positioning mechanism for connecting the pump body, a guide shaft coaxially rotatably connected to the pump body through the positioning mechanism, and a detection mechanism connected to the guide shaft; the positioning mechanism includes a positioning plate connected to the guide shaft and used for connecting the guide shaft to the pump body, and a mounting seat sleeved on the guide shaft to limit the axial displacement of the guide shaft; the guide shaft has a plurality of positioning holes equidistantly arranged on its circumferential surface along its length direction, and the detection mechanism includes a first detection element and a second detection element connected to the guide shaft and used for synchronous detection of multi-point form and position tolerances of the pump body.

[0009] In a preferred embodiment of this invention, the positioning disc is fitted onto the guide shaft via an installation ring, and the guide shaft is rotatably connected to the positioning disc via a bearing; the positioning disc is provided in two sets, and the two sets of positioning discs are connected by a connector to form a gap, and the circumferential surface of the positioning disc is formed with an installation step suitable for different pump body inlet ring diameters.

[0010] As a preferred embodiment of this utility model,

[0011] The connecting component includes a connecting rod through which the positioning disk passes, and the connecting rod is threaded with a limiting bolt that restricts the installation position of the positioning disk;

[0012] Alternatively, the connector may include a threaded hole formed on the positioning disk, and a screw connecting the two sets of positioning disks may be fitted into the threaded hole.

[0013] In a preferred embodiment of this invention, the mounting base and the guide shaft are rotatably connected by a bearing assembly; a connecting block is provided between the mounting base and the pump body; an adjustment groove is provided on the mounting base; an adjustment bolt with one end connected to the connecting block is provided in the adjustment groove; the adjustment bolt is used to lock the connecting block on the mounting base.

[0014] In a preferred embodiment of this invention, the connecting block is a magnetic connecting block.

[0015] In a preferred embodiment of this invention, the bearing assembly includes a bearing sleeve fitted on the guide shaft and a bearing connected between the mounting base and the bearing sleeve, wherein the bearing sleeve is provided with bolts on its circumferential surface that engage with the positioning hole.

[0016] In a preferred embodiment of the present invention, the first detection element includes a connecting seat connected to the guide shaft, a mounting block connected to the connecting seat, and a support connecting assembly for connecting the dial indicator to the mounting block, wherein the connecting seat is provided with a set screw that mates with the positioning hole.

[0017] As a preferred embodiment of this invention, the mounting block is a magnetic mounting block.

[0018] In a preferred embodiment of this invention, the second detection element includes a connecting rod passing through the positioning hole. The connecting rod is connected to a dial indicator via a support connection assembly. A locking element for locking the connecting rod on the guide shaft is provided on the guide shaft.

[0019] In a preferred embodiment of this invention, the locking element is a locking screw that is threadedly engaged with the guide shaft, and one end of the locking screw abuts against the connecting rod.

[0020] The beneficial effects of this utility model are as follows: By setting a positioning mechanism, the guide shaft can be connected to the pump body, and the rotation of the guide shaft is limited laterally and axially to improve the stability of the guide shaft rotation and improve the accuracy of detecting the form and position tolerances of the pump body. The positioning plate has multiple installation steps, which allows the fixture to be adapted to different pump body inlet ring diameters. At the same time, the convenient adjustment between the two sets of positioning plates shortens the installation time for inspection and improves the inspection efficiency. The guide rod shaft is coaxial with the pump body, and the guide shaft can rotate without resistance through the bearing, driving the inspection mechanism to rotate freely along the circumference of the pump body. The dial indicator is used to simultaneously detect coaxiality, roundness or end face runout, and obtain the full circumferential form and position tolerance data at one time. The rotary full circumferential inspection structure can break through the limitation of the measurement range. When inspecting different inspection surfaces, only the position of the inspection piece needs to be adjusted, without disassembling the positioning mechanism, realizing the measurement fixture without disassembling it, thereby reducing measurement errors. Attached Figure Description

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific implementation methods.

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the structure of this utility model;

[0024] Figure 3 This is a schematic diagram of the structure of this utility model.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1 guide shaft, 11 positioning holes;

[0027] 2 Positioning mechanism, 21 Positioning disc, 211 Connecting rod, 212 Mounting step, 22 Mounting base, 23 Connecting block, 24 Adjusting groove, 25 Adjusting bolt, 26 Bearing assembly, 261 Bearing sleeve;

[0028] 3. Testing mechanism; 31. First testing component; 311. Connecting seat; 312. Mounting block; 313. Supporting connection assembly; 314. Dial indicator; 32. Second testing component; 321. Connecting rod; 322. Locking screw;

[0029] 4. Pump body. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0031] 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.

[0032] The following is combined with Figure 1-3This invention describes a specific embodiment of a pump body form and position tolerance inspection tool, comprising: a positioning mechanism 2 connected to the pump body 4; a guide shaft 1 rotatably connected to the pump body 4 via the positioning mechanism 2; and a detection mechanism 3 connected to the guide shaft 1. The positioning mechanism 2 connects the guide shaft 1 to the open surface of the pump body 4, and the detection mechanism 3 is connected to the guide shaft 1 to detect the form and position tolerances (such as coaxiality, roundness, and end face runout) of the pump body 4, thereby determining the operating efficiency and service life of the pump body 4. Component 2 includes a positioning disk 21 connected to the guide shaft 1 and used for connecting the guide shaft 1 to the pump body 4, and a mounting base 22 sleeved on the guide shaft 1 to limit the axial displacement of the guide shaft 1. The guide shaft 1 is rotatably connected to the positioning disk 21. The positioning disk 21 is used to position the guide shaft 1 in a lateral position on the pump body 4, so that the guide shaft 1 can be coaxially rotatably connected to the pump body 4, and drives the detection mechanism 3 connected to the guide shaft 1 to rotate to detect the form and position tolerances of the pump body 4. The mounting base 22 is rotatably connected to the guide shaft 1. The mounting base 22 is connected to the pump body 4 to limit the axial rotation of the drive shaft 1, preventing the guide shaft 1 from moving along its circumferential surface during rotation, thereby improving the stability of the guide shaft 1's rotation and the accuracy of the form and position tolerance inspection of the pump body 4. The guide shaft 1 has multiple positioning holes 11 equidistantly spaced along its length on its circumferential surface. These positioning holes 11 are used for the adjustable installation of the first inspection piece 31 and the second inspection piece 32, enabling the inspection fixture to be applicable to the inspection of different pump body 4 models. The inspection mechanism 3 includes a first inspection piece connected to the guide shaft 1. The measuring component 31 and the second measuring component 32 are used for synchronous detection of the multi-point form and position tolerances of the pump body 4. The sequential assembly of the positioning components enables synchronous detection of multiple points of the testing equipment and convenient disassembly and installation of the measuring components. In this fixture, the positioning connection of the positioning plate 21 is used to position the guide shaft 1 on the pump body 4. The mounting base 22 is used to limit the rotation of the guide shaft 1 to prevent it from moving axially when rotating, thereby improving the accuracy of the detection mechanism 3 in detecting the pump body 4 when the guide shaft 1 rotates.

[0033] Please refer to Figure 3As shown, the positioning disk 21 is sleeved on the guide shaft 1 via an installation ring 213. The guide shaft 1 is rotatably connected to the positioning disk 21 via a bearing, thereby connecting the positioning disk 21 and the guide shaft 1. The positioning disk 21 has two sets, which are connected by a connector to form a gap. The circumference of the positioning disk 21 has an installation step 212 suitable for installation with different pump body 4-hole ring diameters. When installing the positioning disk 21, the distance between the pump body 4-hole rings is measured, and the distance between the same installation step 212 on the two sets of positioning disks 21 is adjusted to be equal to the distance between the pump body 4-hole rings. The guide shaft 1 is connected to the positioning disk 21 via a connecting block 23, so that the two sets of positioning disks 21 are installed inside the pump body 4-hole ring, thereby connecting the guide shaft 1 on the pump body 4.

[0034] Please refer to Figure 3 As shown, in one embodiment of the connector, the connector includes a connecting rod 211 that passes through the positioning disk 21. The connecting rod 211 has an installation thread, and a limiting bolt that restricts the installation position of the positioning disk 21 is threaded onto the connecting rod 211. The connecting rod 211 passes through the positioning disk 21, and a bolt is rotatably mounted on the connecting rod 211. Rotating the bolt abuts against both sides of the positioning disk 21 to achieve positioning adjustment of the positioning disk 21 on the connecting rod 211. Through the above adjustment method, the distance between the two sets of positioning disks 21 can be adjusted to meet the installation requirements on the pump body 4.

[0035] In another embodiment of the connector, the connector may include a threaded hole formed on the positioning disk 21, and a screw connecting two sets of positioning disks 21 is fitted in the threaded hole. The screw is threaded into the threaded hole formed on the positioning disk 21 to adjust the distance between the two sets of positioning disks 21 on the screw.

[0036] Please refer to Figures 1-2As shown, the mounting base 22 is rotatably connected to the guide shaft 1 via a bearing assembly 26. The mounting base 22 is connected to the pump body 4 through an open surface, and the mounting base 22 is rotatably sleeved on the guide shaft 1. That is, the guide shaft 1 and the mounting base 22 can be rotatably connected via the bearing assembly 26. At the same time, the mounting base 22 can limit the rotation of the guide shaft 1 to avoid axial movement when the guide shaft 1 rotates, so as to ensure the accuracy of the rotation of the guide shaft 1. The mounting base 22 is connected to the pump body 4 via a connecting block 23. The mounting base 22 is provided with an adjustment groove 24. The adjustment groove 24 is provided with a space for the connecting block 23 to be mounted on the mounting base. The adjusting bolt 25 is locked on the top of the connecting block 23. In the connection between the connecting block 23 and the mounting base 22, the adjusting bolt 25 is set with a threaded fit on the top of the connecting block 23. The top of the adjusting bolt 25 can be slidably connected in the adjusting groove 24. The position of the connecting block 23 on the mounting base 22 can be adjusted in the length direction of the adjusting groove 24. After adjustment, the clamping and positioning on the mounting base 22 is achieved by the cooperation between the adjusting bolt 25 and the connecting block 23 to prevent the mounting base 22 from moving on the pump body 4. At the same time, the adjustable installation between the connecting block 23 and the mounting base 22 improves the connection of the mounting base 22 to different specifications and models of pump bodies 4.

[0037] Please refer to Figure 3 As shown, the connecting block 23 is a magnetic connecting block 23. The magnetic movable connecting block 23 can improve the ease of installation and removal of the mounting base 22 on the pump body 4, while satisfying the connection between the connecting block 23 and the open surface of the pump body 4, so as to facilitate the adjustment or installation of the detection mechanism 3. The magnetic movable connecting block is a conventional technology. The magnetic force of the connecting block itself can be controlled by the rotating part, which will not be described in detail here.

[0038] Please refer to Figure 3 As shown, the bearing assembly 26 includes a bearing sleeve 261 sleeved on the guide shaft 1 and a bearing connected between the mounting base 22 and the bearing sleeve 261. The bearing sleeve 261 has bolts on its circumferential surface that are inserted into the positioning hole 11. The bearing sleeve 261 is connected to the guide shaft 1 by the bolts on its circumferential surface and the positioning hole 11. The guide shaft 1 is rotatably connected to the mounting base 22 under the action of the bearing and the bearing sleeve 261, and the rotation of the guide shaft 1 is limited by the mounting base 22 and cannot move axially.

[0039] Please refer to Figure 3As shown, the first detection component 31 includes a connecting seat 311 connected to the guide shaft 1, a mounting block 312 connected to the connecting seat 311, and a support connection assembly 313 for connecting the dial indicator 314 to the mounting block 312. The connecting seat 311 is provided with a set screw that mates with the positioning hole 11. The connecting seat 311 is connected to the guide shaft 1 by mates with the positioning hole 11 through the set screw connected thereon. At the same time, the mounting block 312 is connected to the connecting seat 311, and the mounting block 312 is connected to the dial indicator 314 by the fixed connection of the support connection assembly 313. The support connection assembly 313 enables the dial indicator 314 to be connected to the mounting block 312. The support connection assembly 313 is a conventional technology that provides support for the dial indicator 314 while allowing for multi-angle adjustment to ensure that the detection tip is in contact with the surface to be measured. This is a conventional technology in the field and will not be described in detail here.

[0040] Please refer to Figure 3 As shown, the mounting block 312 is a magnetic mounting block 312, which enables convenient installation and removal of the dial indicator 314 connected to the mounting block 312, thereby improving the convenience of measurement and adjustment.

[0041] Please refer to Figures 2-3 As shown, the second detection element 32 includes a connecting rod 321 passing through the positioning hole 11. A dial indicator 314 is connected to the connecting rod 321 via a support connecting assembly 313. A locking member is provided on the guide shaft 1 for locking the connecting rod 321 on the guide shaft 1. The second detection element 32 is used to detect the form and position tolerances of another circular surface of the pump body 4. The connecting rod 321 in the second detection element 32 passes through the positioning hole 11. The support connecting assembly 313 is connected to the connecting rod 321 and the dial indicator 314 is connected to it via the support connecting assembly 313. That is, the dial indicator 314 is connected to the guide shaft 1 via the connecting rod 321.

[0042] Please refer to Figures 2-3 As shown, the locking component is a locking screw 322 that is threaded into the guide shaft 1. One end of the locking screw 322 abuts against the connecting rod 321. After the connecting rod 321 is connected, the locking screw 322 is inserted through the guide shaft 1 and one end is rotated to abut against the connecting rod 321 to prevent the connecting rod 321 from moving through the positioning hole 11. Preferably, the axis of the connecting rod 321 is perpendicular to the axis of the locking screw 322 so that the locking screw 322 can firmly lock the connecting rod 321, thereby reducing the measurement error of the dial indicator 314.

[0043] Working principle of this utility model:

[0044] 1. Positioning Preparation: Select the corresponding positioning plate 21 and install the step 212 according to the diameter of the pump body 4 inlet ring, and adjust the distance between the two sets of positioning plates 21 so that the distance can be positioned inside the pump body 4 inlet ring after adjustment; adjust the installation position of the mounting base 22 on the pump body 4, and after the position is adjusted, turn on the magnetic base switch to make the connecting block 23 magnetically connected to the pump body 4; pass the guide shaft 1 through the mounting base 22 and the positioning plate 21, and lock the guide shaft 1 in the mounting base 22 and the positioning plate 21 to ensure that the guide shaft 1 is rotatably connected to the positioning plate 21 and the mounting base 22 respectively. The axial position of the mounting base 22 on the guide shaft 1 can be limited by the bearing sleeve 261 in the mounting base 22 to avoid axial movement of the guide shaft 1 when it rotates. The positioning plate 21 connects the guide shaft 1 to the pump body 4, which can prevent the lateral movement of the guide shaft 1.

[0045] 2. Adjust the detection point: In the first detection piece 31, slide the connecting seat 311 to the position to be detected (such as the inner wall or end face of the pump body 4), and lock the connecting seat 311 to the guide shaft 1 through the set screw. Magnetically connect the mounting block 312 to the connecting seat 311, and adjust the dial indicator 314 connected to the connecting seat 311 to fit against the surface to be tested.

[0046] In the second testing component 32, the connecting rod 321 is passed through the positioning hole 11, and the locking screw 322 is connected to the guide shaft 1 to lock the connecting rod 321, thereby realizing the connection of the dial indicator 314 in the second testing component 32 on the guide shaft 1, and the tip of the dial indicator 314 in the second testing component 32 is adjusted to fit the surface to be measured through the support connection component 313.

[0047] 3. Data Acquisition: Manually rotate the guide rod shaft to drive the dial indicator 314 in the first detection component 31 and the second detection component 32 to rotate around the axis of the pump body 4 for one revolution, and record the difference between the maximum and minimum values ​​to calculate the form and position tolerances; or drive the guide rod shaft to rotate at a constant speed by a motor, and wirelessly transmit the data of the dial indicator 314 to the terminal to generate a three-dimensional error map.

[0048] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0049] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

Claims

1. A pump body form tolerance gauge, characterized by: The system includes a positioning mechanism (2) connecting the pump body (4), a guide shaft (1) coaxially rotatably connected to the pump body (4) via the positioning mechanism (2), and a detection mechanism (3) connected to the guide shaft (1). The positioning mechanism (2) includes a positioning disk (21) connected to the guide shaft (1) and used for connecting the guide shaft (1) to the pump body (4), and a mounting seat (22) sleeved on the guide shaft (1) to limit the axial displacement of the guide shaft (1). The guide shaft (1) has a plurality of positioning holes (11) equidistantly arranged along its length direction on its circumferential surface. The detection mechanism (3) includes a first detection element (31) and a second detection element (32) connected to the guide shaft (1) and used for synchronous detection of the multi-point form and position tolerances of the pump body (4).

2. A pump body form tolerance gauge according to claim 1, wherein: The positioning disk (21) is sleeved on the guide shaft (1) through the mounting ring (213), and the guide shaft (1) is rotatably connected to the positioning disk (21) through the bearing; the positioning disk (21) is provided in two sets, and the two sets of positioning disks (21) are connected by a connector to form a gap, and the circumferential surface of the positioning disk (21) is formed with mounting steps (212) suitable for different pump body (4) inlet ring diameters.

3. The pump body form and position tolerance inspection tool according to claim 2, characterized in that: The connecting member includes a connecting rod (211) that passes through the positioning disk (21), and the connecting rod (211) is threaded with a limiting bolt that restricts the installation position of the positioning disk (21); Alternatively, the connector may include a threaded hole formed on the positioning disk (21), and a screw connecting the two sets of positioning disks (21) may be fitted inside the threaded hole.

4. The pump body form tolerance gauge of claim 1, wherein: The mounting base (22) and the guide shaft (1) are rotatably connected by a bearing assembly (26); a connecting block (23) is provided between the mounting base (22) and the pump body (4); an adjustment groove (24) is provided on the mounting base (22); an adjustment bolt (25) with one end connected to the connecting block (23) is provided in the adjustment groove (24); the adjustment bolt (25) is used to lock the connecting block (23) on the mounting base (22).

5. A pump body form tolerance gauge according to claim 4, wherein: The connecting block (23) is a magnetic connecting block (23).

6. A pump body form and position tolerance inspection tool according to claim 4, characterized in that: The bearing assembly (26) includes a bearing sleeve (261) fitted on the guide shaft (1) and a bearing connected between the mounting base (22) and the bearing sleeve (261). The bearing sleeve (261) has a bolt on its circumferential surface that is inserted into the positioning hole (11).

7. A pump body form and position tolerance inspection tool according to claim 1, characterized in that: The first detection element (31) includes a connecting seat (311) connected to the guide shaft (1), a mounting block (312) connected to the connecting seat (311), and a support connection assembly (313) for connecting the dial indicator (314) to the mounting block (312). The connecting seat (311) is provided with a set screw that mates with the positioning hole (11).

8. A pump body form and position tolerance inspection tool according to claim 7, characterized in that: The mounting block (312) is a magnetic mounting block (312).

9. A pump body form and position tolerance inspection tool according to claim 1, characterized in that: The second detection element (32) includes a connecting rod (321) passing through the positioning hole (11), the connecting rod (321) is connected to a dial indicator (314) via a support connection assembly (313), and the guide shaft (1) is provided with a locking element for locking the connecting rod (321) on the guide shaft (1).

10. A pump body form and position tolerance inspection tool according to claim 9, characterized in that: The locking component is a locking screw (322) that is threadedly engaged with the guide shaft (1), and one end of the locking screw (322) abuts against the connecting rod (321).

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